nail.h

   1 /*@ S-nail - a mail user agent derived from Berkeley Mail.
   2  *@ Header inclusion, macros, constants, types and the global var declarations.
   3  *
   4  * Copyright (c) 2000-2004 Gunnar Ritter, Freiburg i. Br., Germany.
   5  * Copyright (c) 2012 - 2016 Steffen (Daode) Nurpmeso <steffen@sdaoden.eu>.
   6  */
   7 /*
   8  * Copyright (c) 1980, 1993
   9  *      The Regents of the University of California.  All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 /*
  37  * Mail -- a mail program
  38  *
  39  * Author: Kurt Shoens (UCB) March 25, 1978
  40  */
  41
  42 #include "config.h"
  43
  44 #include <sys/stat.h>
  45 #include <sys/types.h>
  46
  47 #ifdef HAVE_GETTIMEOFDAY
  48 # include <sys/time.h>
  49 #endif
  50
  51 #include <errno.h>
  52 #include <fcntl.h>
  53 #include <limits.h>
  54 #include <setjmp.h>
  55 #include <signal.h>
  56 #include <stdarg.h>
  57 #include <stdio.h>
  58 #include <stdlib.h>
  59 #include <string.h>
  60 #include <termios.h>
  61 #include <time.h>
  62 #include <unistd.h>
  63
  64 #if defined __STDC_VERSION__ && __STDC_VERSION__ + 0 >= 199901L
  65 # include <stdint.h>
  66 #else
  67 # include <inttypes.h>
  68 #endif
  69
  70 #ifdef HAVE_C90AMEND1
  71 # include <wchar.h>
  72 # include <wctype.h>
  73 #endif
  74 #ifdef HAVE_DEBUG
  75 # include <assert.h>
  76 #endif
  77 #ifdef HAVE_ICONV
  78 # include <iconv.h>
  79 #endif
  80 #ifdef HAVE_REGEX
  81 # include <regex.h>
  82 #endif
  83
  84 #ifdef HAVE_SSL_MD5
  85 # include <openssl/md5.h>
  86 #endif
  87
  88 /*
  89  * Constants, some nail-specific macros
  90  */
  91
  92 #if !defined NI_MAXHOST
  93 # define NI_MAXHOST     1025
  94 #endif
  95
  96 /* TODO PATH_MAX: fixed-size buffer is always wrong (think NFS) */
  97 #ifndef PATH_MAX
  98 # ifdef MAXPATHLEN
  99 #  define PATH_MAX      MAXPATHLEN
 100 # else
 101 #  define PATH_MAX      1024        /* _XOPEN_PATH_MAX POSIX 2008/Cor 1-2013 */
 102 # endif
 103 #endif
 104
 105 #ifndef HOST_NAME_MAX
 106 # ifdef _POSIX_HOST_NAME_MAX
 107 #  define HOST_NAME_MAX _POSIX_HOST_NAME_MAX
 108 # else
 109 #  define HOST_NAME_MAX 255
 110 # endif
 111 #endif
 112
 113 #ifndef NAME_MAX
 114 # ifdef _POSIX_NAME_MAX
 115 #  define NAME_MAX      _POSIX_NAME_MAX
 116 # else
 117 #  define NAME_MAX      14
 118 # endif
 119 #endif
 120 #if NAME_MAX < 8
 121 # error NAME_MAX too small
 122 #endif
 123
 124 #ifndef STDIN_FILENO
 125 # define STDIN_FILENO   0
 126 #endif
 127 #ifndef STDOUT_FILENO
 128 # define STDOUT_FILENO  1
 129 #endif
 130 #ifndef STDERR_FILENO
 131 # define STDERR_FILENO  2
 132 #endif
 133
 134 #ifdef NSIG_MAX
 135 # undef NSIG
 136 # define NSIG           NSIG_MAX
 137 #elif !defined NSIG
 138 # define NSIG           ((sizeof(sigset_t) * 8) - 1)
 139 #endif
 140
 141 #ifdef O_CLOEXEC
 142 # define _O_CLOEXEC        O_CLOEXEC
 143 # define _CLOEXEC_SET(FD)  do {;} while(0)
 144 #else
 145 # define _O_CLOEXEC        0
 146 # define _CLOEXEC_SET(FD)  \
 147    do { (void)fcntl((FD), F_SETFD, FD_CLOEXEC); } while (0)
 148 #endif
 149
 150 #ifdef O_NOFOLLOW
 151 # define n_O_NOFOLLOW      O_NOFOLLOW
 152 #else
 153 # define n_O_NOFOLLOW      0
 154 #endif
 155
 156 /*  */
 157
 158 #if BUFSIZ + 0 > 2560               /* TODO simply use BUFSIZ? */
 159 # define LINESIZE       BUFSIZ      /* max readable line width */
 160 #else
 161 # define LINESIZE       2560
 162 #endif
 163 #define BUFFER_SIZE     (BUFSIZ >= (1u << 13) ? BUFSIZ : (1u << 14))
 164
 165 /* Network protocol newline */
 166 #define NETNL           "\015\012"
 167 #define NETLINE(X)      X NETNL
 168
 169 /* Number of Not-Yet-Dead calls that are remembered */
 170 #if defined HAVE_DEBUG || defined HAVE_DEVEL || defined HAVE_NYD2
 171 # ifdef HAVE_NYD2
 172 #  define NYD_CALLS_MAX (25 * 84)
 173 # elif defined HAVE_DEVEL
 174 #  define NYD_CALLS_MAX (25 * 42)
 175 # else
 176 #  define NYD_CALLS_MAX (25 * 10)
 177 # endif
 178 #endif
 179
 180 #define APPEND                   /* New mail goes to end of mailbox */
 181 #define CBAD            (-15555)
 182 #define DOTLOCK_TRIES   5        /* Number of open(2) calls for dotlock */
 183 #define FILE_LOCK_TRIES 10       /* Maximum tries before n_file_lock() fails */
 184 #define FILE_LOCK_MILLIS 200     /* If UIZ_MAX, fall back to that */
 185 #define ERRORS_MAX      1000     /* Maximum error ring entries TODO configable*/
 186 #define ESCAPE          '~'      /* Default escape for sending */
 187 #define HIST_SIZE       242      /* tty.c: history list default size */
 188 #define HSHSIZE         23       /* Hash prime TODO make dynamic, obsolete */
 189 #define MAXARGC         1024     /* Maximum list of raw strings */
 190 #define MAXEXP          25       /* Maximum expansion of aliases */
 191 #define PROMPT_BUFFER_SIZE 80    /* getprompt() bufsize (> 3!) */
 192 #define REFERENCES_MAX  20       /* Maximum entries in References: */
 193 #define FTMP_OPEN_TRIES 10       /* Maximum number of Ftmp() open(2) tries */
 194
 195 #define ACCOUNT_NULL    "null"   /* Name of "null" account */
 196
 197 /* Some environment variables for pipe hooks */
 198 #define AGENT_USER      "NAIL_USER"
 199 #define AGENT_USER_ENC  "NAIL_USER_ENC"
 200 #define AGENT_HOST      "NAIL_HOST"
 201 #define AGENT_HOST_PORT "NAIL_HOST_PORT"
 202
 203 /* Colour stuff */
 204 #ifdef HAVE_COLOUR
 205 # define n_COLOUR(X)       X
 206 #else
 207 # define n_COLOUR(X)
 208 #endif
 209
 210 /* Special FD requests for run_command() / start_command() */
 211 #define COMMAND_FD_PASS -1
 212 #define COMMAND_FD_NULL -2
 213
 214 /*  */
 215 #define FROM_DATEBUF    64    /* Size of RFC 4155 From_ line date */
 216 #define DATE_DAYSYEAR   365L
 217 #define DATE_SECSMIN    60L
 218 #define DATE_MINSHOUR   60L
 219 #define DATE_HOURSDAY   24L
 220 #define DATE_SECSDAY    (DATE_SECSMIN * DATE_MINSHOUR * DATE_HOURSDAY)
 221
 222 /* *indentprefix* default as of POSIX */
 223 #define INDENT_DEFAULT  "\t"
 224
 225 /* Default *encoding* as enum mime_enc below */
 226 #define MIME_DEFAULT_ENCODING MIMEE_QP
 227
 228 /* Maximum allowed line length in a mail before QP folding is necessary), and
 229  * the real limit we go for */
 230 #define MIME_LINELEN_MAX   998   /* Plus CRLF */
 231 #define MIME_LINELEN_LIMIT (MIME_LINELEN_MAX - 48)
 232
 233 /* Ditto, SHOULD */
 234 #define MIME_LINELEN    78    /* Plus CRLF */
 235
 236 /* And in headers which contain an encoded word according to RFC 2047 there is
 237  * yet another limit; also RFC 2045: 6.7, (5). */
 238 #define MIME_LINELEN_RFC2047 76
 239
 240 /* Locations of mime.types(5) */
 241 #define MIME_TYPES_USR  "~/.mime.types"
 242 #define MIME_TYPES_SYS  "/etc/mime.types"
 243
 244 /* Fallback MIME charsets, if *charset-7bit* and *charset-8bit* or not set.
 245  * (Keep in SYNC: ./nail.1:"Character sets", ./nail.h:CHARSET_*!) */
 246 #define CHARSET_7BIT    "US-ASCII"
 247 #ifdef HAVE_ICONV
 248 # define CHARSET_8BIT      "UTF-8"
 249 # define CHARSET_8BIT_OKEY charset_8bit
 250 #else
 251 # define CHARSET_8BIT      "ISO-8859-1"
 252 # define CHARSET_8BIT_OKEY ttycharset
 253 #endif
 254
 255 /* Some environment variables for pipe hooks etc. */
 256 #define NAILENV_TMPDIR              "NAIL_TMPDIR"
 257 #define NAILENV_FILENAME            "NAIL_FILENAME"
 258 #define NAILENV_FILENAME_GENERATED  "NAIL_FILENAME_GENERATED"
 259 #define NAILENV_FILENAME_TEMPORARY  "NAIL_FILENAME_TEMPORARY"
 260 #define NAILENV_CONTENT             "NAIL_CONTENT"
 261 #define NAILENV_CONTENT_EVIDENCE    "NAIL_CONTENT_EVIDENCE"
 262
 263 /* Is *W* a quoting (ASCII only) character? */
 264 #define ISQUOTE(W) \
 265    ((W) == n_WC_C('>') || (W) == n_WC_C('|') ||\
 266     (W) == n_WC_C('}') || (W) == n_WC_C(':'))
 267
 268 /* Maximum number of quote characters (not bytes!) that'll be used on
 269  * follow lines when compressing leading quote characters */
 270 #define QUOTE_MAX       42
 271
 272 /* How much spaces should a <tab> count when *quote-fold*ing? (power-of-two!) */
 273 #define QUOTE_TAB_SPACES 8
 274
 275 /* Smells fishy after, or asks for shell expansion, dependent on context */
 276 #define n_SHEXP_MAGIC_PATH_CHARS "|&;<>{}()[]*?$`'\"\\"
 277
 278 /* Maximum size of a message that is passed through to the spam system */
 279 #define SPAM_MAXSIZE    420000
 280
 281 /* String dope: dynamic buffer size, and size of the single builtin one that's
 282  * used first; note that these value include the size of the structure */
 283 #define SBUFFER_SIZE    ((0x10000u >> 1u) - 0x400)
 284 #define SBUFFER_BUILTIN (0x10000u >> 1u)
 285
 286 /* Switch indicating necessity of terminal access interface (termcap.c) */
 287 #if defined HAVE_TERMCAP || defined HAVE_COLOUR || defined HAVE_MLE
 288 # define n_HAVE_TCAP
 289 #endif
 290
 291 /*
 292  * OS, CC support, generic macros etc.
 293  */
 294
 295 /* OS: we're not a library, only set what needs special treatment somewhere */
 296 #define OS_DRAGONFLY    0
 297 #define OS_SOLARIS      0
 298 #define OS_SUNOS        0
 299
 300 #ifdef __DragonFly__
 301 # undef OS_DRAGONFLY
 302 # define OS_DRAGONFLY   1
 303 #elif defined __solaris__ || defined __sun
 304 # if defined __SVR4 || defined __svr4__
 305 #  undef OS_SOLARIS
 306 #  define OS_SOLARIS    1
 307 # else
 308 #  undef OS_SUNOS
 309 #  define OS_SUNOS      1
 310 # endif
 311 #endif
 312
 313 /* CC */
 314 #define CC_CLANG           0
 315 #define PREREQ_CLANG(X,Y)  0
 316 #define CC_GCC             0
 317 #define PREREQ_GCC(X,Y)    0
 318 #define CC_TCC             0
 319 #define PREREQ_TCC(X,Y)    0
 320
 321 #ifdef __clang__
 322 # undef CC_CLANG
 323 # undef PREREQ_CLANG
 324 # define CC_CLANG          1
 325 # define PREREQ_CLANG(X,Y) \
 326    (__clang_major__ + 0 > (X) || \
 327     (__clang_major__ + 0 == (X) && __clang_minor__ + 0 >= (Y)))
 328 # define __EXTEN           __extension__
 329
 330 #elif defined __GNUC__
 331 # undef CC_GCC
 332 # undef PREREQ_GCC
 333 # define CC_GCC            1
 334 # define PREREQ_GCC(X,Y)   \
 335    (__GNUC__ + 0 > (X) || (__GNUC__ + 0 == (X) && __GNUC_MINOR__ + 0 >= (Y)))
 336 # define __EXTEN           __extension__
 337
 338 #elif defined __TINYC__
 339 # undef CC_TCC
 340 # define CC_TCC            1
 341 #endif
 342
 343 #ifndef __EXTEN
 344 # define __EXTEN
 345 #endif
 346
 347 /* Suppress some technical warnings via #pragma's unless developing.
 348  * XXX Wild guesses: clang(1) 1.7 and (OpenBSD) gcc(1) 4.2.1 don't work */
 349 #ifndef HAVE_DEVEL
 350 # if PREREQ_CLANG(3, 4)
 351 #  pragma clang diagnostic ignored "-Wassign-enum"
 352 #  pragma clang diagnostic ignored "-Wdisabled-macro-expansion"
 353 #  pragma clang diagnostic ignored "-Wformat"
 354 #  pragma clang diagnostic ignored "-Wunused-result"
 355 # elif PREREQ_GCC(4, 7)
 356 #  pragma GCC diagnostic ignored "-Wunused-local-typedefs"
 357 #  pragma GCC diagnostic ignored "-Wunused-result"
 358 #  pragma GCC diagnostic ignored "-Wformat"
 359 # endif
 360 #endif
 361
 362 /* For injection macros like DBG(), NATCH_CHAR() */
 363 #define COMMA           ,
 364
 365 #define EMPTY_FILE()    typedef int CONCAT(avoid_empty_file__, n_FILE);
 366
 367 /* Pointer to size_t */
 368 #define PTR2SIZE(X)     ((size_t)(uintptr_t)(X))
 369
 370 /* Pointer comparison (types from below) */
 371 #define PTRCMP(A,C,B)   ((uintptr_t)(A) C (uintptr_t)(B))
 372
 373 /* Ditto, compare (maybe mixed-signed) integers cases to T bits, unsigned;
 374  * Note: doesn't sign-extend correctly, that's still up to the caller */
 375 #define UICMP(T,A,C,B)  ((ui ## T ## _t)(A) C (ui ## T ## _t)(B))
 376
 377 /* Align something to a size/boundary that cannot cause just any problem */
 378 #define n_ALIGN(X)      (((X) + 2*sizeof(void*)) & ~((2*sizeof(void*)) - 1))
 379 #define n_ALIGN_SMALL(X) (((X) + sizeof(void*)) & ~((sizeof(void*)) - 1))
 380
 381 /* Members in constant array */
 382 #ifndef NELEM
 383 # define NELEM(A)       (sizeof(A) / sizeof(A[0]))
 384 #endif
 385
 386 /* sizeof() for member fields */
 387 #define SIZEOF_FIELD(T,F) sizeof(((T *)NULL)->F)
 388
 389 /* Casts-away (*NOT* cast-away) */
 390 #define UNUSED(X)       ((void)(X))
 391 #define UNCONST(P)      ((void*)(uintptr_t)(void const*)(P))
 392 #define UNVOLATILE(P)   ((void*)(uintptr_t)(void volatile*)(P))
 393 /* To avoid warnings with modern compilers for "char*i; *(si32_t*)i=;" */
 394 #define UNALIGN(T,P)    ((T)(uintptr_t)(P))
 395 #define UNXXX(T,C,P)    ((T)(uintptr_t)(C)(P))
 396
 397 /* __STDC_VERSION__ is ISO C99, so also use __STDC__, which should work */
 398 #if defined __STDC__ || defined __STDC_VERSION__ /*|| defined __cplusplus*/
 399 # define STRING(X)      #X
 400 # define XSTRING(X)     STRING(X)
 401 # define CONCAT(S1,S2)  _CONCAT(S1, S2)
 402 # define _CONCAT(S1,S2) S1 ## S2
 403 #else
 404 # define STRING(X)      "X"
 405 # define XSTRING        STRING
 406 # define CONCAT(S1,S2)  S1/**/S2
 407 #endif
 408
 409 #if defined __STDC_VERSION__ && __STDC_VERSION__ + 0 >= 199901L
 410 # define n_FIELD_INITN(N) CONCAT(., N) =
 411 # define n_FIELD_INITI(I) [I] =
 412 #else
 413 # define n_FIELD_INITN(N)
 414 # define n_FIELD_INITI(N)
 415 #endif
 416
 417 #if defined __STDC_VERSION__ && __STDC_VERSION__ + 0 >= 199901L
 418 # define VFIELD_SIZE(X)
 419 # define VFIELD_SIZEOF(T,F) (0)
 420 # define VSTRUCT_SIZEOF(T,F) sizeof(T)
 421 #else
 422 # define VFIELD_SIZE(X) \
 423   ((X) == 0 ? sizeof(size_t) \
 424    : ((ssize_t)(X) < 0 ? sizeof(size_t) - ABS(X) : (size_t)(X)))
 425 # define VFIELD_SIZEOF(T,F) SIZEOF_FIELD(T, F)
 426 # define VSTRUCT_SIZEOF(T,F) (sizeof(T) - SIZEOF_FIELD(T, F))
 427 #endif
 428
 429 #ifdef HAVE_INLINE
 430 # define SINLINE        n_INLINE /* TODO obsolete */
 431 #else
 432 # define SINLINE        static
 433 #endif
 434
 435 #undef __FUN__
 436 #if defined __STDC_VERSION__ && __STDC_VERSION__ + 0 >= 199901L
 437 # define __FUN__        __func__
 438 #elif CC_CLANG || PREREQ_GCC(3, 4)
 439 # define __FUN__        __extension__ __FUNCTION__
 440 #else
 441 # define __FUN__        uagent   /* Something that is not a literal */
 442 #endif
 443
 444 #if defined __predict_true && defined __predict_false
 445 # define LIKELY(X)      __predict_true(X)
 446 # define UNLIKELY(X)    __predict_false(X)
 447 #elif CC_CLANG || PREREQ_GCC(2, 96)
 448 # define LIKELY(X)      __builtin_expect(X, 1)
 449 # define UNLIKELY(X)    __builtin_expect(X, 0)
 450 #else
 451 # define LIKELY(X)      (X)
 452 # define UNLIKELY(X)    (X)
 453 #endif
 454
 455 #undef HAVE_NATCH_CHAR
 456 #undef NATCH_CHAR
 457 #if defined HAVE_SETLOCALE && defined HAVE_C90AMEND1 && defined HAVE_WCWIDTH
 458 # define HAVE_NATCH_CHAR
 459 # define NATCH_CHAR(X)  X
 460 #else
 461 # define NATCH_CHAR(X)
 462 #endif
 463
 464 /* Compile-Time-Assert
 465  * Problem is that some compilers warn on unused local typedefs, so add
 466  * a special local CTA to overcome this */
 467 #define CTA(TEST)       _CTA_1(TEST, n_FILE, __LINE__)
 468 #define LCTA(TEST)      _LCTA_1(TEST, n_FILE, __LINE__)
 469
 470 #if defined __STDC_VERSION__ && __STDC_VERSION__ + 0 >= 201112L
 471 # define n_CTA(T,M) _Static_assert(T, M)
 472 # define n_LCTA(T,M) _Static_assert(T, M)
 473 #else
 474 # define n_CTA(T,M)  _CTA_1(T, n_FILE, __LINE__)
 475 # define n_LCTA(T,M) _LCTA_1(T, n_FILE, __LINE__)
 476 #endif
 477 #define n_CTAV(T) n_CTA(T, "Unexpected value of constant")
 478 #define n_LCTAV(T) n_LCTA(T, "Unexpected value of constant")
 479
 480 #ifdef n_MAIN_SOURCE
 481 # define n_MCTA(T,M) n_CTA(T, M);
 482 #else
 483 # define n_MCTA(T,M)
 484 #endif
 485
 486 #define _CTA_1(T,F,L)   _CTA_2(T, F, L)
 487 #define _CTA_2(T,F,L)  \
 488    typedef char ASSERTION_failed_in_file_## F ## _at_line_ ## L[(T) ? 1 : -1]
 489 #define _LCTA_1(T,F,L)  _LCTA_2(T, F, L)
 490 #define _LCTA_2(T,F,L) \
 491 do {\
 492    typedef char ASSERTION_failed_in_file_## F ## _at_line_ ## L[(T) ? 1 : -1];\
 493    ASSERTION_failed_in_file_## F ## _at_line_ ## L __i_am_unused__;\
 494    UNUSED(__i_am_unused__);\
 495 } while (0)
 496
 497 #define UNINIT(N,V)     N = V
 498
 499 #undef ISPOW2
 500 #define ISPOW2(X)       ((((X) - 1) & (X)) == 0)
 501 #undef MIN
 502 #define MIN(A, B)       ((A) < (B) ? (A) : (B))
 503 #undef MAX
 504 #define MAX(A, B)       ((A) < (B) ? (B) : (A))
 505 #undef ABS
 506 #define ABS(A)          ((A) < 0 ? -(A) : (A))
 507
 508 /* Create a bit mask for the bit range LO..HI -- HI can't use highest bit! */
 509 #define n_BITENUM_MASK(LO,HI) (((1u << ((HI) + 1)) - 1) & ~((1u << (LO)) - 1))
 510
 511 #undef DBG
 512 #undef NDBG
 513 #ifndef HAVE_DEBUG
 514 # undef assert
 515 # define assert(X)      UNUSED(0)
 516 # define DBG(X)
 517 # define NDBG(X)        X
 518 # define DBGOR(X,Y)     Y
 519 #else
 520 # define DBG(X)         X
 521 # define NDBG(X)
 522 # define DBGOR(X,Y)     X
 523 #endif
 524
 525 /* Translation (init in main.c) */
 526 #undef _
 527 #undef N_
 528 #undef V_
 529 #define _(S)            S
 530 #define N_(S)           S
 531 #define V_(S)           S
 532
 533 /*
 534  * Types TODO v15: n_XX_t
 535  */
 536
 537 #ifdef UINT8_MAX
 538 # define UI8_MAX        UINT8_MAX
 539 # define SI8_MIN        INT8_MIN
 540 # define SI8_MAX        INT8_MAX
 541 typedef uint8_t         ui8_t;
 542 typedef int8_t          si8_t;
 543 #elif UCHAR_MAX != 255
 544 # error UCHAR_MAX must be 255
 545 #else
 546 # define UI8_MAX        UCHAR_MAX
 547 # define SI8_MIN        CHAR_MIN
 548 # define SI8_MAX        CHAR_MAX
 549 typedef unsigned char   ui8_t;
 550 typedef signed char     si8_t;
 551 #endif
 552
 553 #if !defined PRIu8 || !defined PRId8
 554 # undef PRIu8
 555 # undef PRId8
 556 # define PRIu8          "hhu"
 557 # define PRId8          "hhd"
 558 #endif
 559
 560 #ifdef UINT16_MAX
 561 # define UI16_MAX       UINT16_MAX
 562 # define SI16_MIN       INT16_MIN
 563 # define SI16_MAX       INT16_MAX
 564 typedef uint16_t        ui16_t;
 565 typedef int16_t         si16_t;
 566 #elif USHRT_MAX != 0xFFFFu
 567 # error USHRT_MAX must be 0xFFFF
 568 #else
 569 # define UI16_MAX       USHRT_MAX
 570 # define SI16_MIN       SHRT_MIN
 571 # define SI16_MAX       SHRT_MAX
 572 typedef unsigned short  ui16_t;
 573 typedef signed short    si16_t;
 574 #endif
 575
 576 #if !defined PRIu16 || !defined PRId16
 577 # undef PRIu16
 578 # undef PRId16
 579 # if UI16_MAX == UINT_MAX
 580 #  define PRIu16        "u"
 581 #  define PRId16        "d"
 582 # else
 583 #  define PRIu16        "hu"
 584 #  define PRId16        "hd"
 585 # endif
 586 #endif
 587
 588 #ifdef UINT32_MAX
 589 # define UI32_MAX       UINT32_MAX
 590 # define SI32_MIN       INT32_MIN
 591 # define SI32_MAX       INT32_MAX
 592 typedef uint32_t        ui32_t;
 593 typedef int32_t         si32_t;
 594 #elif ULONG_MAX == 0xFFFFFFFFu
 595 # define UI32_MAX       ULONG_MAX
 596 # define SI32_MIN       LONG_MIN
 597 # define SI32_MAX       LONG_MAX
 598 typedef unsigned long int  ui32_t;
 599 typedef signed long int    si32_t;
 600 #elif UINT_MAX != 0xFFFFFFFFu
 601 # error UINT_MAX must be 0xFFFFFFFF
 602 #else
 603 # define UI32_MAX       UINT_MAX
 604 # define SI32_MIN       INT_MIN
 605 # define SI32_MAX       INT_MAX
 606 typedef unsigned int    ui32_t;
 607 typedef signed int      si32_t;
 608 #endif
 609
 610 #if !defined PRIu32 || !defined PRId32
 611 # undef PRIu32
 612 # undef PRId32
 613 # if UI32_MAX == ULONG_MAX
 614 #  define PRIu32        "lu"
 615 #  define PRId32        "ld"
 616 # else
 617 #  define PRIu32        "u"
 618 #  define PRId32        "d"
 619 # endif
 620 #endif
 621
 622 #ifdef UINT64_MAX
 623 # define UI64_MAX       UINT64_MAX
 624 # define SI64_MIN       INT64_MIN
 625 # define SI64_MAX       INT64_MAX
 626 typedef uint64_t        ui64_t;
 627 typedef int64_t         si64_t;
 628 #elif ULONG_MAX <= 0xFFFFFFFFu
 629 # if !defined ULLONG_MAX || (ULLONG_MAX >> 31) < 0xFFFFFFFFu
 630 #  error We need a 64 bit integer
 631 # else
 632 #  define UI64_MAX      ULLONG_MAX
 633 #  define SI64_MIN      LLONG_MIN
 634 #  define SI64_MAX      LLONG_MAX
 635 __EXTEN typedef unsigned long long  ui64_t;
 636 __EXTEN typedef signed long long    si64_t;
 637 # endif
 638 #else
 639 # define UI64_MAX       ULONG_MAX
 640 # define SI64_MIN       LONG_MIN
 641 # define SI64_MAX       LONG_MAX
 642 typedef unsigned long   ui64_t;
 643 typedef signed long     si64_t;
 644 #endif
 645
 646 #if !defined PRIu64 || !defined PRId64 || !defined PRIX64
 647 # undef PRIu64
 648 # undef PRId64
 649 # undef PRIX64
 650 # if defined ULLONG_MAX && UI64_MAX == ULLONG_MAX
 651 #  define PRIu64        "llu"
 652 #  define PRId64        "lld"
 653 #  define PRIX64        "llX"
 654 # else
 655 #  define PRIu64        "lu"
 656 #  define PRId64        "ld"
 657 #  define PRIX64        "lX"
 658 # endif
 659 #endif
 660
 661 /* (So that we can use UICMP() for size_t comparison, too) */
 662 typedef size_t          uiz_t;
 663 typedef ssize_t         siz_t;
 664
 665 #undef PRIuZ
 666 #undef PRIdZ
 667 #if defined __STDC_VERSION__ && __STDC_VERSION__ + 0 >= 199901L
 668 # define PRIuZ          "zu"
 669 # define PRIdZ          "zd"
 670 # define UIZ_MAX        SIZE_MAX
 671 #elif defined SIZE_MAX
 672   /* UnixWare has size_t as unsigned as required but uses a signed limit
 673    * constant (which is thus false!) */
 674 # if SIZE_MAX == UI64_MAX || SIZE_MAX == SI64_MAX
 675 #  define PRIuZ         PRIu64
 676 #  define PRIdZ         PRId64
 677 n_MCTA(sizeof(size_t) == sizeof(ui64_t),
 678    "Format string mismatch, compile with ISO C99 compiler (-std=c99)!")
 679 # elif SIZE_MAX == UI32_MAX || SIZE_MAX == SI32_MAX
 680 #  define PRIuZ         PRIu32
 681 #  define PRIdZ         PRId32
 682 n_MCTA(sizeof(size_t) == sizeof(ui32_t),
 683    "Format string mismatch, compile with ISO C99 compiler (-std=c99)!")
 684 # else
 685 #  error SIZE_MAX is neither UI64_MAX nor UI32_MAX (please report this)
 686 # endif
 687 # define UIZ_MAX        SIZE_MAX
 688 #endif
 689 #ifndef PRIuZ
 690 # define PRIuZ          "lu"
 691 # define PRIdZ          "ld"
 692 n_MCTA(sizeof(size_t) == sizeof(unsigned long),
 693    "Format string mismatch, compile with ISO C99 compiler (-std=c99)!")
 694 # define UIZ_MAX        ULONG_MAX
 695 #endif
 696
 697 #ifndef UINTPTR_MAX
 698 # ifdef SIZE_MAX
 699 #  define uintptr_t     size_t
 700 #  define UINTPTR_MAX   SIZE_MAX
 701 # else
 702 #  define uintptr_t     unsigned long
 703 #  define UINTPTR_MAX   ULONG_MAX
 704 # endif
 705 #endif
 706
 707 #if !defined PRIuPTR || !defined PRIXPTR
 708 # undef PRIuPTR
 709 # undef PRIXPTR
 710 # if UINTPTR_MAX == ULONG_MAX
 711 #  define PRIuPTR       "lu"
 712 #  define PRIXPTR       "lX"
 713 # else
 714 #  define PRIuPTR       "u"
 715 #  define PRIXPTR       "X"
 716 # endif
 717 #endif
 718
 719 #ifdef HAVE_C90AMEND1
 720 typedef wchar_t         wc_t;
 721 # define n_WC_C(X)      L ## X
 722 #else
 723 typedef char            wc_t; /* Yep: really 8-bit char */
 724 # define n_WC_C(X)      X
 725 #endif
 726
 727 enum {FAL0, TRU1, TRUM1 = -1};
 728 typedef si8_t           bool_t;
 729
 730 /* Add shorter aliases for "normal" integers TODO v15 -> n_XX_t */
 731 typedef unsigned long   ul_i;
 732 typedef unsigned int    ui_i;
 733 typedef unsigned short  us_i;
 734 typedef unsigned char   uc_i;
 735
 736 typedef signed long     sl_i;
 737 typedef signed int      si_i;
 738 typedef signed short    ss_i;
 739 typedef signed char     sc_i;
 740
 741 typedef void (          *sighandler_type)(int); /* TODO v15 obsolete */
 742 typedef void (          *n_sighdl_t)(int);
 743
 744 enum authtype {
 745    AUTHTYPE_NONE     = 1<<0,
 746    AUTHTYPE_PLAIN    = 1<<1,  /* POP3: APOP is covered by this */
 747    AUTHTYPE_LOGIN    = 1<<2,
 748    AUTHTYPE_CRAM_MD5 = 1<<3,
 749    AUTHTYPE_GSSAPI   = 1<<4
 750 };
 751
 752 enum expand_addr_flags {
 753    EAF_NONE       = 0,        /* -> EAF_NOFILE | EAF_NOPIPE */
 754    EAF_RESTRICT   = 1<<0,     /* "restrict" (do unless interaktive / -[~#]) */
 755    EAF_FAIL       = 1<<1,     /* "fail" */
 756    /* Bits reused by enum expand_addr_check_mode! */
 757    EAF_FILE       = 1<<3,     /* +"file" targets */
 758    EAF_PIPE       = 1<<4,     /* +"pipe" command pipe targets */
 759    EAF_NAME       = 1<<5,     /* +"name"s (non-address) names / MTA aliases */
 760    EAF_ADDR       = 1<<6,     /* +"addr" network address (contain "@") */
 761
 762    EAF_TARGET_MASK  = EAF_FILE | EAF_PIPE | EAF_NAME | EAF_ADDR,
 763    EAF_RESTRICT_TARGETS = EAF_NAME | EAF_ADDR /* (default set if not set) */
 764 };
 765
 766 enum expand_addr_check_mode {
 767    EACM_NONE      = 0,        /* Don't care about *expandaddr* */
 768    EACM_NORMAL    = 1<<0,     /* Use our normal *expandaddr* checking */
 769    EACM_STRICT    = 1<<1,     /* Never allow any file or pipe addresse */
 770    EACM_MODE_MASK = 0x3,      /* _NORMAL and _STRICT are mutual! */
 771
 772    EACM_NOLOG     = 1<<2,     /* Don't log check errors */
 773
 774    /* Some special overwrites of EAF_TARGETs.
 775     * May NOT clash with EAF_* bits which may be ORd to these here! */
 776
 777    EACM_NONAME    = 1<<16
 778 };
 779
 780 enum n_cmd_arg_desc_flags{/* TODO incomplete, misses getmsglist() */
 781    /* - A type */
 782    n_CMD_ARG_DESC_STRING = 1<<0,    /* A !blankspacechar() string */
 783    n_CMD_ARG_DESC_WYSH = 1<<1,      /* sh(1)ell-style quoted */
 784
 785    n__CMD_ARG_DESC_TYPE_MASK = n_CMD_ARG_DESC_STRING | n_CMD_ARG_DESC_WYSH,
 786
 787    /* - Optional flags */
 788    /* It is not an error if an optional argument is missing; once an argument
 789     * has been declared optional only optional arguments may follow */
 790    n_CMD_ARG_DESC_OPTION = 1<<16,
 791    /* GREEDY: parse as many of that type as possible; must be last entry */
 792    n_CMD_ARG_DESC_GREEDY = 1<<17,
 793    /* Honour an overall "stop" request in one of the arguments (\c@ or #) */
 794    n_CMD_ARG_DESC_HONOUR_STOP = 1<<18,
 795
 796    n__CMD_ARG_DESC_FLAG_MASK = n_CMD_ARG_DESC_OPTION | n_CMD_ARG_DESC_GREEDY |
 797          n_CMD_ARG_DESC_HONOUR_STOP
 798 };
 799
 800 #ifdef HAVE_COLOUR
 801 /* We do have several contexts of colour IDs; since only one of them can be
 802  * active at any given time let's share the value range */
 803 enum n_colour_ctx{
 804    n_COLOUR_CTX_SUM,
 805    n_COLOUR_CTX_VIEW,
 806    n_COLOUR_CTX_MLE,
 807    n__COLOUR_CTX_MAX
 808 };
 809
 810 enum n_colour_id{
 811    /* Header summary */
 812    n_COLOUR_ID_SUM_DOTMARK = 0,
 813    n_COLOUR_ID_SUM_HEADER,
 814    n_COLOUR_ID_SUM_THREAD,
 815
 816    /* Message display */
 817    n_COLOUR_ID_VIEW_FROM_ = 0,
 818    n_COLOUR_ID_VIEW_HEADER,
 819    n_COLOUR_ID_VIEW_MSGINFO,
 820    n_COLOUR_ID_VIEW_PARTINFO,
 821
 822    /* Mailx-Line-Editor */
 823    n_COLOUR_ID_MLE_POSITION = 0,
 824    n_COLOUR_ID_MLE_PROMPT,
 825
 826    n__COLOUR_IDS = n_COLOUR_ID_VIEW_PARTINFO + 1
 827 };
 828
 829 /* Colour preconditions, let's call them tags, cannot be an enum because for
 830  * message display they are the actual header name of the current header.  Thus
 831  * let's use constants of pseudo pointers */
 832 # define n_COLOUR_TAG_SUM_DOT ((char*)-2)
 833 # define n_COLOUR_TAG_SUM_OLDER ((char*)-3)
 834 #endif /* HAVE_COLOUR */
 835
 836 enum conversion {
 837    CONV_NONE,        /* no conversion */
 838    CONV_7BIT,        /* no conversion, is 7bit */
 839    CONV_FROMQP,      /* convert from quoted-printable */
 840    CONV_TOQP,        /* convert to quoted-printable */
 841    CONV_8BIT,        /* convert to 8bit (iconv) */
 842    CONV_FROMB64,     /* convert from base64 */
 843    CONV_FROMB64_T,   /* convert from base64/text */
 844    CONV_TOB64,       /* convert to base64 */
 845    CONV_FROMHDR,     /* convert from RFC1522 format */
 846    CONV_TOHDR,       /* convert to RFC1522 format */
 847    CONV_TOHDR_A      /* convert addresses for header */
 848 };
 849
 850 enum cproto {
 851    CPROTO_SMTP,
 852    CPROTO_POP3
 853 };
 854
 855 enum n_dotlock_state{
 856    n_DLS_NONE,
 857    n_DLS_CANT_CHDIR,    /* Failed to chdir(2) into desired path */
 858    n_DLS_NAMETOOLONG,   /* Lock file name would be too long */
 859    n_DLS_ROFS,          /* Read-only filesystem (no error, mailbox RO) */
 860    n_DLS_NOPERM,        /* No permission to creat lock file */
 861    n_DLS_NOEXEC,        /* Privilege separated dotlocker not found */
 862    n_DLS_PRIVFAILED,    /* Rising privileges failed in dotlocker */
 863    n_DLS_EXIST,         /* Lock file already exists, stale lock? */
 864    n_DLS_FISHY,         /* Something makes us think bad of situation */
 865    n_DLS_DUNNO,         /* Catch-all error */
 866    n_DLS_PING,          /* Not an error, but have to wait for lock */
 867    n_DLS_ABANDON = 1<<7 /* ORd to any but _NONE: give up, don't retry */
 868 };
 869
 870 enum exit_status {
 871    EXIT_OK        = EXIT_SUCCESS,
 872    EXIT_ERR       = EXIT_FAILURE,
 873    EXIT_USE       = 64,       /* sysexits.h:EX_USAGE */
 874    EXIT_NOUSER    = 67,       /* :EX_NOUSER */
 875    EXIT_COLL_ABORT = 1<<1,    /* Message collection was aborted */
 876    EXIT_SEND_ERROR = 1<<2     /* Unspecified send error occurred */
 877 };
 878
 879 enum fedit_mode {
 880    FEDIT_NONE     = 0,
 881    FEDIT_SYSBOX   = 1<<0,     /* %: prefix */
 882    FEDIT_RDONLY   = 1<<1,     /* Readonly (per-box, OPT_R_FLAG is global) */
 883    FEDIT_NEWMAIL  = 1<<2      /* `newmail' operation TODO OBSOLETE THIS! */
 884 };
 885
 886 enum fexp_mode {
 887    FEXP_FULL,                 /* Full expansion */
 888    FEXP_NOPROTO = 1<<0,       /* TODO no which_protocol() to decide expansion */
 889    FEXP_SILENT = 1<<1,        /* Don't print but only return errors */
 890    FEXP_MULTIOK = 1<<2,       /* Expansion to many entries is ok */
 891    FEXP_LOCAL = 1<<3,         /* Result must be local file/maildir */
 892    FEXP_NSHORTCUT = 1<<4,     /* Don't expand shortcuts */
 893    FEXP_NSPECIAL = 1<<5,      /* No %,#,& specials */
 894    FEXP_NFOLDER = 1<<6,       /* NSPECIAL and no + folder, too */
 895    FEXP_NSHELL = 1<<7,        /* Don't do shell word exp. (but ~/, $VAR) */
 896    FEXP_NVAR = 1<<8           /* ..not even $VAR expansion */
 897 };
 898
 899 enum n_file_lock_type{
 900    FLT_READ,
 901    FLT_WRITE
 902 };
 903
 904 enum n_iconv_flags{
 905    n_ICONV_NONE = 0,
 906    n_ICONV_IGN_ILSEQ = 1<<0,     /* Ignore EILSEQ in input (replacement char) */
 907    n_ICONV_IGN_NOREVERSE = 1<<1, /* .. non-reversible conversions in output */
 908    n_ICONV_DEFAULT = n_ICONV_IGN_ILSEQ | n_ICONV_IGN_NOREVERSE
 909 };
 910
 911 enum n_lexinput_flags{
 912    n_LEXINPUT_NONE,
 913    n_LEXINPUT_CTX_BASE = 0,            /* Input context (`bind'+): fallback */
 914    n_LEXINPUT_CTX_COMPOSE = 1,
 915    n__LEXINPUT_CTX_MASK = 1,
 916    n__LEXINPUT_CTX_MAX = n_LEXINPUT_CTX_COMPOSE + 1,
 917
 918    n_LEXINPUT_NL_ESC = 1<<8,           /* Support "\\$" line continuation */
 919 #if 0
 920    n_LEXINPUT_DROP_TRAIL_SPC = 1<<9,   /* Drop any trailing space */
 921    n_LEXINPUT_DROP_LEAD_SPC = 1<<10,   /* ..leading ones */
 922    n_LEXINPUT_TRIM_SPACE = n_LEXINPUT_DROP_TRAIL_SPC | n_LEXINPUT_DROP_LEAD_SPC,
 923 #endif
 924
 925    n_LEXINPUT_HIST_ADD = 1<<16,        /* Add the result to history list */
 926    n_LEXINPUT_HIST_GABBY = 1<<17       /* Consider history entry as gabby */
 927 };
 928
 929 enum mimecontent {
 930    MIME_UNKNOWN,     /* unknown content */
 931    MIME_SUBHDR,      /* inside a multipart subheader */
 932    MIME_822,         /* message/rfc822 content */
 933    MIME_MESSAGE,     /* other message/ content */
 934    MIME_TEXT_PLAIN,  /* text/plain content */
 935    MIME_TEXT_HTML,   /* text/html content */
 936    MIME_TEXT,        /* other text/ content */
 937    MIME_ALTERNATIVE, /* multipart/alternative content */
 938    MIME_RELATED,     /* mime/related (RFC 2387) */
 939    MIME_DIGEST,      /* multipart/digest content */
 940    MIME_MULTI,       /* other multipart/ content */
 941    MIME_PKCS7,       /* PKCS7 content */
 942    MIME_DISCARD      /* content is discarded */
 943 };
 944
 945 enum mime_counter_evidence {
 946    MIMECE_NONE,
 947    MIMECE_SET        = 1<<0,  /* *mime-counter-evidence* was set */
 948    MIMECE_BIN_OVWR   = 1<<1,  /* appli../octet-stream: check, ovw if possible */
 949    MIMECE_ALL_OVWR   = 1<<2,  /* all: check, ovw if possible */
 950    MIMECE_BIN_PARSE  = 1<<3   /* appli../octet-stream: classify contents last */
 951 };
 952
 953 /* Content-Transfer-Encodings as defined in RFC 2045:
 954  * - Quoted-Printable, section 6.7
 955  * - Base64, section 6.8 */
 956 #define QP_LINESIZE     (4 * 19)       /* Max. compliant QP linesize */
 957
 958 #define B64_LINESIZE    (4 * 19)       /* Max. compliant Base64 linesize */
 959 #define B64_ENCODE_INPUT_PER_LINE 57   /* Max. input for Base64 encode/line */
 960
 961 enum mime_enc {
 962    MIMEE_NONE,       /* message is not in MIME format */
 963    MIMEE_BIN,        /* message is in binary encoding */
 964    MIMEE_8B,         /* message is in 8bit encoding */
 965    MIMEE_7B,         /* message is in 7bit encoding */
 966    MIMEE_QP,         /* message is quoted-printable */
 967    MIMEE_B64         /* message is in base64 encoding */
 968 };
 969
 970 /* xxx QP came later, maybe rewrite all to use mime_enc_flags directly? */
 971 enum mime_enc_flags {
 972    MIMEEF_NONE,
 973    MIMEEF_SALLOC     = 1<<0,  /* Use salloc(), not srealloc().. */
 974    /* ..result .s,.l point to user buffer of *_LINESIZE+[+[+]] bytes instead */
 975    MIMEEF_BUF        = 1<<1,
 976    MIMEEF_CRLF       = 1<<2,  /* (encode) Append "\r\n" to lines */
 977    MIMEEF_LF         = 1<<3,  /* (encode) Append "\n" to lines */
 978    /* (encode) If one of _CRLF/_LF is set, honour *_LINESIZE+[+[+]] and
 979     * inject the desired line-ending whenever a linewrap is desired */
 980    MIMEEF_MULTILINE  = 1<<4,
 981    /* (encode) Quote with header rules, do not generate soft NL breaks?
 982     * For mustquote(), specifies whether special RFC 2047 header rules
 983     * should be used instead */
 984    MIMEEF_ISHEAD     = 1<<5,
 985    /* (encode) Ditto; for mustquote() this furtherly fine-tunes behaviour in
 986     * that characters which would not be reported as "must-quote" when
 987     * detecting whether quoting is necessary at all will be reported as
 988     * "must-quote" if they have to be encoded in an encoded word */
 989    MIMEEF_ISENCWORD  = 1<<6,
 990    __MIMEEF_LAST     = 6
 991 };
 992
 993 enum qpflags {
 994    QP_NONE        = MIMEEF_NONE,
 995    QP_SALLOC      = MIMEEF_SALLOC,
 996    QP_BUF         = MIMEEF_BUF,
 997    QP_ISHEAD      = MIMEEF_ISHEAD,
 998    QP_ISENCWORD   = MIMEEF_ISENCWORD
 999 };
1000
1001 enum b64flags {
1002    B64_NONE       = MIMEEF_NONE,
1003    B64_SALLOC     = MIMEEF_SALLOC,
1004    B64_BUF        = MIMEEF_BUF,
1005    B64_CRLF       = MIMEEF_CRLF,
1006    B64_LF         = MIMEEF_LF,
1007    B64_MULTILINE  = MIMEEF_MULTILINE,
1008    /* Not used, but for clarity only */
1009    B64_ISHEAD     = MIMEEF_ISHEAD,
1010    B64_ISENCWORD  = MIMEEF_ISENCWORD,
1011    /* Special version of Base64, "Base64URL", according to RFC 4648.
1012     * Only supported for encoding! */
1013    B64_RFC4648URL = 1<<(__MIMEEF_LAST+1),
1014    /* Don't use any ("=") padding;
1015     * may NOT be used with any of _CRLF, _LF or _MULTILINE */
1016    B64_NOPAD      = 1<<(__MIMEEF_LAST+2)
1017 };
1018
1019 enum mime_parse_flags {
1020    MIME_PARSE_NONE      = 0,
1021    MIME_PARSE_DECRYPT   = 1<<0,
1022    MIME_PARSE_PARTS     = 1<<1
1023 };
1024
1025 enum mime_handler_flags {
1026    MIME_HDL_NULL,                /* No pipe- mimetype handler, go away */
1027    MIME_HDL_CMD,                 /* Normal command */
1028    MIME_HDL_TEXT,                /* @ special cmd to force treatment as text */
1029    MIME_HDL_PTF,                 /* A special pointer-to-function handler */
1030    MIME_HDL_MSG,                 /* Display msg (returned as command string) */
1031    MIME_HDL_TYPE_MASK   = 7,
1032    MIME_HDL_ISQUOTE     = 1<<4,  /* Is quote action (we have info, keep it!) */
1033    MIME_HDL_NOQUOTE     = 1<<5,  /* No MIME for quoting */
1034    MIME_HDL_ALWAYS      = 1<<6,  /* Handler shall run for multi-msg actions */
1035    MIME_HDL_ASYNC       = 1<<7,  /* Should run asynchronously */
1036    MIME_HDL_NEEDSTERM   = 1<<8,  /* Takes over terminal */
1037    MIME_HDL_TMPF        = 1<<9,  /* Create temporary file (zero-sized) */
1038    MIME_HDL_TMPF_FILL   = 1<<10, /* Fill in the msg body content */
1039    MIME_HDL_TMPF_UNLINK = 1<<11  /* Delete it later again */
1040 };
1041
1042 enum mlist_state {
1043    MLIST_OTHER       = 0,     /* Normal address */
1044    MLIST_KNOWN       = 1,     /* A known `mlist' */
1045    MLIST_SUBSCRIBED  = -1     /* A `mlsubscribe'd list */
1046 };
1047
1048 enum oflags {
1049    OF_RDONLY      = 1<<0,
1050    OF_WRONLY      = 1<<1,
1051    OF_RDWR        = 1<<2,
1052    OF_APPEND      = 1<<3,
1053    OF_CREATE      = 1<<4,
1054    OF_TRUNC       = 1<<5,
1055    OF_EXCL        = 1<<6,
1056    OF_CLOEXEC     = 1<<7,     /* TODO not used, always implied!  CHANGE!! */
1057    OF_UNLINK      = 1<<8,     /* Only for Ftmp(): unlink(2) after creation */
1058    OF_HOLDSIGS    = 1<<9,     /* Mutual with OF_UNLINK - await Ftmp_free() */
1059    OF_REGISTER    = 1<<10,    /* Register file in our file table */
1060    OF_REGISTER_UNLINK = 1<<11, /* unlink(2) upon unreg.; _REGISTER asserted! */
1061    OF_SUFFIX      = 1<<12     /* Ftmp() name hint is mandatory! extension! */
1062 };
1063
1064 enum okay {
1065    STOP = 0,
1066    OKAY = 1
1067 };
1068
1069 enum okey_xlook_mode {
1070    OXM_PLAIN      = 1<<0,     /* Plain key always tested */
1071    OXM_H_P        = 1<<1,     /* Check PLAIN-.url_h_p */
1072    OXM_U_H_P      = 1<<2,     /* Check PLAIN-.url_u_h_p */
1073    OXM_ALL        = 0x7
1074 };
1075
1076 /* <0 means "stop" unless *prompt* extensions are enabled. */
1077 enum prompt_exp {
1078    PROMPT_STOP    = -1,       /* \c */
1079    /* *prompt* extensions: \$, \@ etc. */
1080    PROMPT_DOLLAR  = -2,
1081    PROMPT_AT      = -3
1082 };
1083
1084 enum protocol {
1085    PROTO_FILE,       /* refers to a local file */
1086    PROTO_POP3,       /* is a pop3 server string */
1087    PROTO_MAILDIR,    /* refers to a maildir folder */
1088    PROTO_UNKNOWN     /* unknown protocol */
1089 };
1090
1091 enum sendaction {
1092    SEND_MBOX,        /* no conversion to perform */
1093    SEND_RFC822,      /* no conversion, no From_ line */
1094    SEND_TODISP,      /* convert to displayable form */
1095    SEND_TODISP_ALL,  /* same, include all MIME parts */
1096    SEND_SHOW,        /* convert to 'show' command form */
1097    SEND_TOSRCH,      /* convert for IMAP SEARCH */
1098    SEND_TOFILE,      /* convert for saving body to a file */
1099    SEND_TOPIPE,      /* convert for pipe-content/subc. */
1100    SEND_QUOTE,       /* convert for quoting */
1101    SEND_QUOTE_ALL,   /* same, include all MIME parts */
1102    SEND_DECRYPT      /* decrypt */
1103 };
1104
1105 enum n_shexp_parse_flags{
1106    n_SHEXP_PARSE_NONE,
1107    /* Don't perform any expansions or interpret backslash escape sequences etc.
1108     * Output may be NULL, otherwise the possibly trimmed non-expanded input is
1109     * used as output */
1110    n_SHEXP_PARSE_DRYRUN = 1<<0,
1111    n_SHEXP_PARSE_TRUNC = 1<<1,         /* Truncate result storage on entry */
1112    n_SHEXP_PARSE_TRIMSPACE = 1<<2,     /* Ignore space surrounding tokens */
1113    n_SHEXP_PARSE_LOG = 1<<3,           /* Log errors */
1114    n_SHEXP_PARSE_LOG_D_V = 1<<4,       /* Log errors if OPT_D_V */
1115    n_SHEXP_PARSE_IFS_ADD_COMMA = 1<<5, /* Add comma , to normal "IFS" */
1116    n_SHEXP_PARSE_IFS_IS_COMMA = 1<<6,  /* Let comma , be the sole "IFS" */
1117    n_SHEXP_PARSE_IGNORE_EMPTY = 1<<7,  /* Ignore empty tokens, start over */
1118    n_SHEXP_PARSE_QUOTE_AUTOCLOSE = 1<<8, /* Ignore an open quote at EOS */
1119    n__SHEXP_PARSE_LAST = 8
1120 };
1121
1122 enum n_shexp_state{
1123    n_SHEXP_STATE_NONE,
1124    /* We have produced some output (or would have, with _PARSE_DRYRUN).
1125     * Note that empty quotes like '' produce no output but set this bit */
1126    n_SHEXP_STATE_OUTPUT = 1<<2,
1127    /* Don't call the parser again (\c0 or # comment seen; out of input).
1128     * Not (necessarily) mutual with _OUTPUT) */
1129    n_SHEXP_STATE_STOP = 1<<1,
1130    n_SHEXP_STATE_UNICODE = 1<<3,       /* \[Uu] used */
1131    n_SHEXP_STATE_CONTROL = 1<<4,       /* Control characters seen */
1132
1133    n_SHEXP_STATE_ERR_CONTROL = 1<<16,  /* \c notation with invalid argument */
1134    n_SHEXP_STATE_ERR_UNICODE = 1<<17,  /* Valid \[Uu] used and !OPT_UNICODE */
1135    n_SHEXP_STATE_ERR_NUMBER = 1<<18,   /* Bad number (\[UuXx]) */
1136    n_SHEXP_STATE_ERR_BRACE = 1<<19,    /* _QUOTEOPEN + no } brace for ${VAR */
1137    n_SHEXP_STATE_ERR_BADSUB = 1<<20,   /* Empty/bad ${} substitution */
1138    n_SHEXP_STATE_ERR_QUOTEOPEN = 1<<21, /* Quote remains open at EOS */
1139
1140    n_SHEXP_STATE_ERR_MASK = n_BITENUM_MASK(16, 21)
1141 };
1142
1143 enum n_sigman_flags{
1144    n_SIGMAN_NONE = 0,
1145    n_SIGMAN_HUP = 1<<0,
1146    n_SIGMAN_INT = 1<<1,
1147    n_SIGMAN_QUIT = 1<<2,
1148    n_SIGMAN_TERM = 1<<3,
1149    n_SIGMAN_PIPE = 1<<4,
1150
1151    n_SIGMAN_IGN_HUP = 1<<5,
1152    n_SIGMAN_IGN_INT = 1<<6,
1153    n_SIGMAN_IGN_QUIT = 1<<7,
1154    n_SIGMAN_IGN_TERM = 1<<8,
1155
1156    n_SIGMAN_ALL = 0xFF,
1157    /* Mostly for _leave() reraise flags */
1158    n_SIGMAN_VIPSIGS = n_SIGMAN_HUP | n_SIGMAN_INT | n_SIGMAN_QUIT |
1159          n_SIGMAN_TERM,
1160    n_SIGMAN_NTTYOUT_PIPE = 1<<16,
1161    n_SIGMAN_VIPSIGS_NTTYOUT = n_SIGMAN_HUP | n_SIGMAN_INT | n_SIGMAN_QUIT |
1162          n_SIGMAN_TERM | n_SIGMAN_NTTYOUT_PIPE,
1163
1164    n__SIGMAN_PING = 1<<17
1165 };
1166
1167 #ifdef HAVE_SSL
1168 enum ssl_verify_level {
1169    SSL_VERIFY_IGNORE,
1170    SSL_VERIFY_WARN,
1171    SSL_VERIFY_ASK,
1172    SSL_VERIFY_STRICT
1173 };
1174 #endif
1175
1176 enum tdflags {
1177    TD_NONE,                   /* no display conversion */
1178    TD_ISPR        = 1<<0,     /* use isprint() checks */
1179    TD_ICONV       = 1<<1,     /* use iconv() */
1180    TD_DELCTRL     = 1<<2,     /* delete control characters */
1181
1182    /*
1183     * NOTE: _TD_EOF and _TD_BUFCOPY may be ORd with enum conversion and
1184     * enum sendaction, and may thus NOT clash with their bit range!
1185     */
1186    _TD_EOF        = 1<<14,    /* EOF seen, last round! */
1187    _TD_BUFCOPY    = 1<<15     /* Buffer may be constant, copy it */
1188 };
1189
1190 #ifdef n_HAVE_TCAP
1191 enum n_termcap_captype{
1192    n_TERMCAP_CAPTYPE_NONE = 0,
1193    /* Internally we share the bitspace, so ensure no value ends up as 0 */
1194    n_TERMCAP_CAPTYPE_BOOL = 1,
1195    n_TERMCAP_CAPTYPE_NUMERIC,
1196    n_TERMCAP_CAPTYPE_STRING,
1197    n__TERMCAP_CAPTYPE_MAX
1198 };
1199
1200 /* Termcap commands; different to queries commands perform actions.
1201  * Commands are resolved upon init time, and are all termcap(5)-compatible,
1202  * therefore we use the short termcap(5) names.
1203  * Note this is parsed by mk-tcap-map.pl, which expects the syntax
1204  * "CONSTANT, COMMENT" where COMMENT is "Capname/TCap-Code, TYPE[, FLAGS]",
1205  * and one of Capname and TCap-Code may be the string "-" meaning ENOENT;
1206  * a | vertical bar or end-of-comment ends processing; see termcap.c.
1207  * We may use the free-form part after | for the "Variable String" and notes on
1208  * necessary termcap_cmd() arguments; if those are in [] brackets they are not
1209  * regular but are only used when the command, i.e., its effect, is somehow
1210  * simulated / faked by a builtin fallback implementation.
1211  * Availability of builtin fallback indicated by leading @ (at-sign) */
1212 enum n_termcap_cmd{
1213 # ifdef HAVE_TERMCAP
1214    n_TERMCAP_CMD_te, /* rmcup/te, STRING | exit_ca_mode: -,- */
1215    n_TERMCAP_CMD_ti, /* smcup/ti, STRING | enter_ca_mode: -,- */
1216
1217    n_TERMCAP_CMD_ks, /* smkx/ks, STRING | keypad_xmit: -,- */
1218    n_TERMCAP_CMD_ke, /* rmkx/ke, STRING | keypad_local: -,- */
1219
1220    n_TERMCAP_CMD_cd, /* ed/cd, STRING | clr_eos: -,- */
1221    n_TERMCAP_CMD_cl, /* clear/cl, STRING | clear_screen(+home): -,- */
1222    n_TERMCAP_CMD_ho, /* home/ho, STRING | cursor_home: -,- */
1223 # endif
1224
1225 # ifdef HAVE_MLE
1226    n_TERMCAP_CMD_ce, /* el/ce, STRING | @ clr_eol: [start-column],- */
1227    n_TERMCAP_CMD_ch, /* hpa/ch, STRING, IDX1 | column_address: column,- */
1228    n_TERMCAP_CMD_cr, /* cr/cr, STRING | @ carriage_return: -,- */
1229    n_TERMCAP_CMD_le, /* cub1/le, STRING, CNT | @ cursor_left: count,- */
1230    n_TERMCAP_CMD_nd, /* cuf1/nd, STRING, CNT | @ cursor_right: count,- */
1231 # endif
1232
1233    n__TERMCAP_CMD_MAX,
1234    n__TERMCAP_CMD_MASK = (1<<24) - 1,
1235
1236    /* Only perform command if ca-mode is used */
1237    n_TERMCAP_CMD_FLAG_CA_MODE = 1<<29,
1238    /* I/O should be flushed after command completed */
1239    n_TERMCAP_CMD_FLAG_FLUSH = 1<<30
1240 };
1241
1242 /* Termcap queries; a query is a command that returns a struct n_termcap_value.
1243  * Queries are resolved once they are used first, and may not be termcap(5)-
1244  * compatible, therefore we use terminfo(5) names.
1245  * Note this is parsed by mk-tcap-map.pl, which expects the syntax
1246  * "CONSTANT, COMMENT" where COMMENT is "Capname/TCap-Code, TYPE[, FLAGS]",
1247  * and one of Capname and TCap-Code may be the string "-" meaning ENOENT;
1248  * a | vertical bar or end-of-comment ends processing; see termcap.c.
1249  * We may use the free-form part after | for the "Variable String" and notes.
1250  * The "xkey | X:" keys are Dickey's xterm extensions, see (our) manual */
1251 enum n_termcap_query{
1252 # ifdef HAVE_COLOUR
1253    n_TERMCAP_QUERY_colors, /* colors/Co, NUMERIC | max_colors */
1254 # endif
1255
1256    /* --mk-tcap-map--: only KEY_BINDINGS follow.  DON'T CHANGE THIS LINE! */
1257    /* Update the `bind' manual on change! */
1258 # ifdef HAVE_KEY_BINDINGS
1259    n_TERMCAP_QUERY_key_backspace, /* kbs/kb, STRING */
1260    n_TERMCAP_QUERY_key_dc,       /* kdch1/kD, STRING | delete-character */
1261       n_TERMCAP_QUERY_key_sdc,      /* kDC / *4, STRING | ..shifted */
1262    n_TERMCAP_QUERY_key_eol,      /* kel/kE, STRING | clear-to-end-of-line */
1263    n_TERMCAP_QUERY_key_exit,     /* kext/@9, STRING */
1264    n_TERMCAP_QUERY_key_ic,       /* kich1/kI, STRING | insert character */
1265       n_TERMCAP_QUERY_key_sic,      /* kIC/#3, STRING | ..shifted */
1266    n_TERMCAP_QUERY_key_home,     /* khome/kh, STRING */
1267       n_TERMCAP_QUERY_key_shome,    /* kHOM/#2, STRING | ..shifted */
1268    n_TERMCAP_QUERY_key_end,      /* kend/@7, STRING */
1269       n_TERMCAP_QUERY_key_send,     /* kEND / *7, STRING | ..shifted */
1270    n_TERMCAP_QUERY_key_npage,    /* knp/kN, STRING */
1271    n_TERMCAP_QUERY_key_ppage,    /* kpp/kP, STRING */
1272    n_TERMCAP_QUERY_key_left,     /* kcub1/kl, STRING */
1273       n_TERMCAP_QUERY_key_sleft,    /* kLFT/#4, STRING | ..shifted */
1274       n_TERMCAP_QUERY_xkey_aleft,   /* kLFT3/-, STRING | X: Alt+left */
1275       n_TERMCAP_QUERY_xkey_cleft,   /* kLFT5/-, STRING | X: Control+left */
1276    n_TERMCAP_QUERY_key_right,    /* kcuf1/kr, STRING */
1277       n_TERMCAP_QUERY_key_sright,   /* kRIT/%i, STRING | ..shifted */
1278       n_TERMCAP_QUERY_xkey_aright,  /* kRIT3/-, STRING | X: Alt+right */
1279       n_TERMCAP_QUERY_xkey_cright,  /* kRIT5/-, STRING | X: Control+right */
1280    n_TERMCAP_QUERY_key_down,     /* kcud1/kd, STRING */
1281       n_TERMCAP_QUERY_xkey_sdown,   /* kDN/-, STRING | ..shifted */
1282       n_TERMCAP_QUERY_xkey_adown,   /* kDN3/-, STRING | X: Alt+down */
1283       n_TERMCAP_QUERY_xkey_cdown,   /* kDN5/-, STRING | X: Control+down */
1284    n_TERMCAP_QUERY_key_up,       /* kcuu1/ku, STRING */
1285       n_TERMCAP_QUERY_xkey_sup,     /* kUP/-, STRING | ..shifted */
1286       n_TERMCAP_QUERY_xkey_aup,     /* kUP3/-, STRING | X: Alt+up */
1287       n_TERMCAP_QUERY_xkey_cup,     /* kUP5/-, STRING | X: Control+up */
1288    n_TERMCAP_QUERY_kf0,          /* kf0/k0, STRING */
1289    n_TERMCAP_QUERY_kf1,          /* kf1/k1, STRING */
1290    n_TERMCAP_QUERY_kf2,          /* kf2/k2, STRING */
1291    n_TERMCAP_QUERY_kf3,          /* kf3/k3, STRING */
1292    n_TERMCAP_QUERY_kf4,          /* kf4/k4, STRING */
1293    n_TERMCAP_QUERY_kf5,          /* kf5/k5, STRING */
1294    n_TERMCAP_QUERY_kf6,          /* kf6/k6, STRING */
1295    n_TERMCAP_QUERY_kf7,          /* kf7/k7, STRING */
1296    n_TERMCAP_QUERY_kf8,          /* kf8/k8, STRING */
1297    n_TERMCAP_QUERY_kf9,          /* kf9/k9, STRING */
1298    n_TERMCAP_QUERY_kf10,         /* kf10/k;, STRING */
1299    n_TERMCAP_QUERY_kf11,         /* kf11/F1, STRING */
1300    n_TERMCAP_QUERY_kf12,         /* kf12/F2, STRING */
1301    n_TERMCAP_QUERY_kf13,         /* kf13/F3, STRING */
1302    n_TERMCAP_QUERY_kf14,         /* kf14/F4, STRING */
1303    n_TERMCAP_QUERY_kf15,         /* kf15/F5, STRING */
1304    n_TERMCAP_QUERY_kf16,         /* kf16/F6, STRING */
1305    n_TERMCAP_QUERY_kf17,         /* kf17/F7, STRING */
1306    n_TERMCAP_QUERY_kf18,         /* kf18/F8, STRING */
1307    n_TERMCAP_QUERY_kf19,         /* kf19/F9, STRING */
1308 # endif /* HAVE_KEY_BINDINGS */
1309
1310    n__TERMCAP_QUERY_MAX
1311 };
1312 #endif /* n_HAVE_TCAP */
1313
1314 enum n_visual_info_flags{
1315    n_VISUAL_INFO_NONE,
1316    n_VISUAL_INFO_ONE_CHAR = 1<<0,         /* Step only one char, then return */
1317    n_VISUAL_INFO_SKIP_ERRORS = 1<<1,      /* Treat via replacement, step byte */
1318    n_VISUAL_INFO_WIDTH_QUERY = 1<<2,      /* Detect visual character widths */
1319
1320    /* Rest only with HAVE_C90AMEND1, mutual with _ONE_CHAR */
1321    n_VISUAL_INFO_WOUT_CREATE = 1<<8,      /* Use/create .vic_woudat */
1322    n_VISUAL_INFO_WOUT_SALLOC = 1<<9,      /* ..salloc() it first */
1323    /* Only visuals into .vic_woudat - implies _WIDTH_QUERY */
1324    n_VISUAL_INFO_WOUT_PRINTABLE = 1<<10,
1325    n__VISUAL_INFO_FLAGS = n_VISUAL_INFO_WOUT_CREATE |
1326          n_VISUAL_INFO_WOUT_SALLOC | n_VISUAL_INFO_WOUT_PRINTABLE
1327 };
1328
1329 enum user_options {
1330    OPT_NONE,
1331    OPT_DEBUG      = 1u<< 0,   /* -d / *debug* */
1332    OPT_VERB       = 1u<< 1,   /* -v / *verbose* */
1333    OPT_VERBVERB   = 1u<< 2,   /* .. even more verbosity */
1334    OPT_EXISTONLY  = 1u<< 3,   /* -e */
1335    OPT_HEADERSONLY = 1u<<4,   /* -H */
1336    OPT_HEADERLIST = 1u<< 5,   /* -L */
1337    OPT_QUICKRUN_MASK = OPT_EXISTONLY | OPT_HEADERSONLY | OPT_HEADERLIST,
1338    OPT_E_FLAG     = 1u<< 7,   /* -E / *skipemptybody* */
1339    OPT_F_FLAG     = 1u<< 8,   /* -F */
1340    OPT_Mm_FLAG    = 1u<< 9,   /* -M or -m (plus option_Mm_arg) */
1341    OPT_N_FLAG     = 1u<<10,   /* -N / *header* */
1342    OPT_R_FLAG     = 1u<<11,   /* -R */
1343    OPT_r_FLAG     = 1u<<12,   /* -r (plus option_r_arg) */
1344    OPT_t_FLAG     = 1u<<13,   /* -t */
1345    OPT_TILDE_FLAG = 1u<<14,   /* -~ */
1346    OPT_BATCH_FLAG = 1u<<15,   /* -# */
1347
1348    /*  */
1349    OPT_MEMDEBUG   = 1<<16,    /* *memdebug* */
1350
1351    /*  */
1352    OPT_SENDMODE   = 1u<<17,   /* Usage case forces send mode */
1353    OPT_TTYIN      = 1u<<18,
1354    OPT_TTYOUT     = 1u<<19,
1355    OPT_INTERACTIVE = 1u<<20,
1356    OPT_UNICODE    = 1u<<21,   /* We're in an UTF-8 environment */
1357    OPT_ENC_MBSTATE = 1u<<22,  /* Multibyte environment with shift states */
1358
1359    /* Some easy-access shortcuts */
1360    OPT_D_V        = OPT_DEBUG | OPT_VERB,
1361    OPT_D_VV       = OPT_DEBUG | OPT_VERBVERB,
1362    OPT_D_V_VV     = OPT_DEBUG | OPT_VERB | OPT_VERBVERB
1363 };
1364
1365 #define OBSOLETE(X) \
1366 do {\
1367    if (options & OPT_D_V_VV)\
1368       n_err("%s: %s\n", _("Obsoletion warning"), X);\
1369 } while (0)
1370 #define OBSOLETE2(X,Y) \
1371 do {\
1372    if (options & OPT_D_V_VV)\
1373       n_err("%s: %s: %s\n", _("Obsoletion warning"), X, Y);\
1374 } while (0)
1375
1376 enum program_state {
1377    PS_NONE           = 0,
1378    PS_STARTED        = 1u<< 0,      /* main.c startup code passed, functional */
1379    PS_ROOT           = 1u<<30,      /* Temporary "bypass any checks" bit */
1380
1381    PS_EXIT           = 1u<< 1,      /* Exit request pending */
1382    PS_SOURCING       = 1u<< 2,      /* During load() or `source' */
1383    PS_RECURSED       = 1u<< 3,      /* State machine recursed, e.g. `~:CMD' */
1384    PS_ROBOT          = 1u<< 4,      /* State machine in non-interactive state */
1385
1386    PS_EVAL_ERROR     = 1u<< 5,      /* Last evaluate() command failed */
1387
1388    PS_HOOK_NEWMAIL   = 1u<< 6,
1389    PS_HOOK           = 1u<< 7,
1390    PS_HOOK_MASK      = PS_HOOK_NEWMAIL | PS_HOOK,
1391
1392    PS_EDIT           = 1u<< 8,      /* Current mailbox not a "system mailbox" */
1393    PS_SETFILE_OPENED = 1u<< 9,      /* (hack) setfile() opened a new box */
1394    PS_SAW_COMMAND    = 1u<<10,      /* ..after mailbox switch */
1395
1396    PS_DID_PRINT_DOT  = 1u<<12,      /* Current message has been printed */
1397
1398    PS_SIGWINCH_PEND  = 1u<<14,      /* Need update of $COLUMNS/$LINES */
1399    PS_PSTATE_PENDMASK = PS_SIGWINCH_PEND, /* pstate housekeeping needed */
1400
1401    PS_ARGLIST_MASK   = n_BITENUM_MASK(17, 18),
1402    PS_MSGLIST_GABBY  = 1u<<17,      /* getmsglist() saw what it thinks: gabby */
1403    PS_MSGLIST_DIRECT = 1u<<18,      /* One msg was directly chosen by number */
1404    /* TODO HACK: until v15 PS_MSGLIST_SAW_NO is an indication whether an entry
1405     * TODO may be placed in the history or not (grep this, see commands()),
1406     * TODO so avoid reusing this bit */
1407    PS_WYSHLIST_SAW_CONTROL = 1u<<18, /* ..saw C0+ control characters */
1408
1409    PS_EXPAND_MULTIRESULT = 1u<<19,  /* Last fexpand() with MULTIOK had .. */
1410
1411    PS_HEADER_NEEDED_MIME = 1u<<20,  /* mime_write_tohdr() needed x TODO HACK! */
1412
1413    PS_READLINE_NL = 1u<<21,         /* readline_input()+ saw a \n TODO HACK! */
1414
1415    PS_COLOUR_ACTIVE  = 1u<<22,      /* n_colour_env_create().._gut() cycle */
1416
1417    /* Various first-time-init switches */
1418    PS_ERRORS_NOTED   = 1u<<24,      /* Ring of `errors' content, print msg */
1419    PS_t_FLAG         = 1u<<26,      /* OPT_t_FLAG made persistant */
1420    PS_TERMCAP_DISABLE = 1u<<27,     /* HAVE_TERMCAP: *termcap-disable* was set */
1421    PS_TERMCAP_CA_MODE = 1u<<28,     /* HAVE_TERMCAP: ca_mode available & used */
1422    PS_LINE_EDITOR_INIT = 1u<<29     /* MLE is initialized */
1423 };
1424
1425 /* A large enum with all the boolean and value options a.k.a their keys.
1426  * Only the constant keys are in here, to be looked up via ok_[bv]look(),
1427  * ok_[bv]set() and ok_[bv]clear().
1428  * Notes:
1429  * - see the comments in accmacvar.c before changing *anything* in here!
1430  * - virt= implies rdonly,nodel
1431  * - import= implies env
1432  * - defval= implies notempty
1433  * - num and posnum are mutual exclusive
1434  * - most default VAL_ues come from in from build system via ./make.rc
1435  * (Keep in SYNC: ./nail.h:okeys, ./nail.rc, ./nail.1:"Initial settings") */
1436 enum okeys {
1437    /* TODO likely temporary hook data, v15 drop */
1438    ok_v_on_compose_enter,
1439    ok_v_on_compose_leave,
1440    ok_v_compose_from,
1441    ok_v_compose_sender,
1442    ok_v_compose_to,
1443    ok_v_compose_cc,
1444    ok_v_compose_bcc,
1445    ok_v_compose_subject,
1446
1447    ok_b_add_file_recipients,
1448    ok_v_agent_shell_lookup,
1449    ok_b_allnet,
1450    ok_b_append,
1451    ok_b_ask,
1452    ok_b_askatend,
1453    ok_b_askattach,
1454    ok_b_askbcc,
1455    ok_b_askcc,
1456    ok_b_asksign,
1457    ok_b_asksub,                        /* {i3val=TRU1} */
1458    ok_b_attachment_ask_content_description,
1459    ok_b_attachment_ask_content_disposition,
1460    ok_b_attachment_ask_content_id,
1461    ok_b_attachment_ask_content_type,
1462    ok_v_attrlist,
1463    ok_v_autobcc,
1464    ok_v_autocc,
1465    ok_b_autocollapse,
1466    ok_b_autoprint,
1467 ok_b_autothread,
1468    ok_v_autosort,
1469
1470    ok_b_bang,
1471    ok_b_batch_exit_on_error,
1472    ok_v_bind_timeout,                  /* {notempty=1,posnum=1} */
1473    ok_b_bsdannounce,
1474    ok_b_bsdcompat,
1475    ok_b_bsdflags,
1476    ok_b_bsdheadline,
1477    ok_b_bsdmsgs,
1478    ok_b_bsdorder,
1479
1480    ok_v_COLUMNS,                       /* {notempty=1,posnum=1,env=1} */
1481    ok_v_charset_7bit,
1482    ok_v_charset_8bit,
1483    ok_v_charset_unknown_8bit,
1484    ok_v_cmd,
1485    ok_b_colour_disable,
1486    ok_b_colour_pager,
1487    ok_v_crt,                           /* {posnum=1} */
1488    ok_v_customhdr,                     /* {nocntrls=1} */
1489
1490    ok_v_DEAD,                          /* {notempty=1,env=1,defval=VAL_DEAD} */
1491    ok_v_datefield,
1492    ok_v_datefield_markout_older,
1493    ok_b_debug,                         /* {vip=1} */
1494    ok_b_disposition_notification_send,
1495    ok_b_dot,
1496    ok_b_dotlock_ignore_error,
1497
1498    ok_v_EDITOR,                        /* {env=1,defval=VAL_EDITOR} */
1499    ok_b_editalong,
1500    ok_b_editheaders,
1501 ok_b_emptybox,
1502    ok_b_emptystart,
1503    ok_v_encoding,
1504    ok_v_escape,
1505    ok_v_expandaddr,
1506    ok_v_expandargv,
1507
1508    ok_v_features,                      /* {virt=VAL_FEATURES} */
1509    ok_b_flipr,
1510    ok_v_folder,                        /* {vip=1} */
1511    ok_v__folder_resolved,              /* {rdonly=1,nodel=1} */
1512    ok_v_folder_hook,
1513    ok_b_followup_to,
1514    ok_v_followup_to_honour,
1515    ok_b_forward_as_attachment,
1516    ok_v_from,
1517    ok_b_fullnames,
1518    ok_v_fwdheading,
1519
1520    ok_v_HOME,                          /* {vip=1,nodel=1,import=1} */
1521    ok_b_header,                        /* {vip=1,i3val=TRU1} */
1522    ok_v_headline,
1523    ok_v_headline_bidi,
1524    ok_v_history_file,
1525    ok_b_history_gabby,
1526    ok_b_history_gabby_persist,
1527    ok_v_history_size,                  /* {notempty=1,num=1} */
1528    ok_b_hold,
1529    ok_v_hostname,
1530
1531    ok_b_idna_disable,
1532    ok_b_ignore,
1533    ok_b_ignoreeof,
1534    ok_v_inbox,
1535    ok_v_indentprefix,
1536
1537    ok_b_keep,
1538    ok_b_keep_content_length,
1539    ok_b_keepsave,
1540
1541    ok_v_LINES,                         /* {notempty=1,posnum=1,env=1} */
1542    ok_v_LISTER,                        /* {env=1,defval=VAL_LISTER} */
1543    ok_v_LOGNAME,                       /* {rdonly=1,import=1} */
1544    ok_b_line_editor_disable,
1545    ok_b_line_editor_no_defaults,
1546
1547    ok_v_MAIL,                          /* {env=1} */
1548    ok_v_MAILRC,                        /* {import=1,defval=VAL_MAILRC} */
1549    ok_v_MBOX,                          /* {env=1,defval=VAL_MBOX} */
1550    ok_b_markanswered,
1551    ok_b_memdebug,                      /* {vip=1} */
1552    ok_b_message_id_disable,
1553    ok_v_message_inject_head,
1554    ok_v_message_inject_tail,
1555    ok_b_metoo,
1556    ok_b_mime_allow_text_controls,
1557    ok_b_mime_alternative_favour_rich,
1558    ok_v_mime_counter_evidence,         /* {posnum=1} */
1559    ok_v_mimetypes_load_control,
1560    /* TODO: v15 (not yet due to <-> sendmail): {defval=VAL_MTA} */
1561    ok_v_mta,
1562    ok_v_mta_arguments,
1563    ok_b_mta_no_default_arguments,
1564     /* TODO v15: (not yet due to <-> sendmail-progname {defval=VAL_MTA_ARGV0} */
1565    ok_v_mta_argv0,
1566
1567    ok_v_NAIL_EXTRA_RC,                 /* {name=NAIL_EXTRA_RC} */
1568    ok_b_NAIL_NO_SYSTEM_RC,             /* {import=1} */
1569 ok_v_NAIL_HEAD,                     /* {name=NAIL_HEAD} */
1570 ok_v_NAIL_HISTFILE,                 /* {name=NAIL_HISTFILE} */
1571 ok_v_NAIL_HISTSIZE,                 /* {name=NAIL_HISTSIZE,notempty=1,num=1} */
1572 ok_v_NAIL_TAIL,                     /* {name=NAIL_TAIL} */
1573    ok_v_NETRC,                      /* {env=1,defval=VAL_NETRC} */
1574    ok_b_netrc_lookup,
1575    ok_v_netrc_pipe,
1576    ok_v_newfolders,
1577    ok_v_newmail,
1578
1579    ok_b_outfolder,
1580
1581    ok_v_PAGER,                         /* {env=1,defval=VAL_PAGER} */
1582    ok_v_PATH,                          /* {nodel=1,import=1} */
1583    ok_b_page,
1584    ok_v_password,
1585    ok_b_piperaw,
1586    ok_v_pop3_auth,
1587    ok_b_pop3_bulk_load,
1588    ok_v_pop3_keepalive,
1589    ok_b_pop3_no_apop,
1590    ok_b_pop3_use_starttls,
1591    ok_b_print_alternatives,
1592    ok_v_prompt,                        /* {i3val="\\& "} */
1593
1594    ok_b_quiet,
1595    ok_v_quote,
1596    ok_b_quote_as_attachment,
1597    ok_v_quote_fold,
1598
1599    ok_b_recipients_in_cc,
1600    ok_v_record,
1601    ok_b_record_resent,
1602    ok_b_reply_in_same_charset,
1603    ok_v_reply_strings,
1604    ok_v_replyto,
1605    ok_v_reply_to_honour,
1606    ok_b_rfc822_body_from_,             /* {name=rfc822-body-from_} */
1607
1608    ok_v_SHELL,                         /* {import=1,defval=VAL_SHELL} */
1609 ok_b_SYSV3,                         /* {env=1} */
1610    ok_b_save,                          /* {i3val=TRU1} */
1611    ok_v_screen,                        /* {notempty=1,posnum=1} */
1612    ok_b_searchheaders,
1613    ok_v_sendcharsets,
1614    ok_b_sendcharsets_else_ttycharset,
1615    ok_v_sender,
1616 ok_v_sendmail,
1617 ok_v_sendmail_arguments,
1618 ok_b_sendmail_no_default_arguments,
1619 ok_v_sendmail_progname,
1620    ok_b_sendwait,
1621    ok_b_showlast,
1622    ok_b_showname,
1623    ok_b_showto,
1624    ok_v_Sign,
1625    ok_v_sign,
1626    ok_v_signature,
1627    ok_b_skipemptybody,                 /* {vip=1} */
1628    ok_v_smime_ca_dir,
1629    ok_v_smime_ca_file,
1630    ok_v_smime_cipher,
1631    ok_v_smime_crl_dir,
1632    ok_v_smime_crl_file,
1633    /* smime-encrypt-USER@HOST */
1634    ok_b_smime_force_encryption,
1635    ok_b_smime_no_default_ca,
1636    ok_b_smime_sign,
1637    ok_v_smime_sign_cert,
1638    ok_v_smime_sign_include_certs,
1639    ok_v_smime_sign_message_digest,
1640 ok_v_smtp,
1641    ok_v_smtp_auth,
1642 ok_v_smtp_auth_password,
1643 ok_v_smtp_auth_user,
1644    ok_v_smtp_hostname,
1645    ok_b_smtp_use_starttls,
1646    ok_v_SOURCE_DATE_EPOCH,/*{name=SOURCE_DATE_EPOCH,env=1,notempty=1,posnum=1}*/
1647    ok_v_spam_interface,
1648    ok_v_spam_maxsize,                  /* {notempty=1,posnum=1} */
1649    ok_v_spamc_command,
1650    ok_v_spamc_arguments,
1651    ok_v_spamc_user,
1652 ok_v_spamd_socket,
1653 ok_v_spamd_user,
1654    ok_v_spamfilter_ham,
1655    ok_v_spamfilter_noham,
1656    ok_v_spamfilter_nospam,
1657    ok_v_spamfilter_rate,
1658    ok_v_spamfilter_rate_scanscore,
1659    ok_v_spamfilter_spam,
1660    ok_v_ssl_ca_dir,
1661    ok_v_ssl_ca_file,
1662    ok_v_ssl_cert,
1663    ok_v_ssl_cipher_list,
1664    ok_v_ssl_config_file,
1665    ok_v_ssl_crl_dir,
1666    ok_v_ssl_crl_file,
1667    ok_v_ssl_key,
1668    ok_v_ssl_method,
1669    ok_b_ssl_no_default_ca,
1670    ok_v_ssl_protocol,
1671    ok_v_ssl_rand_egd,
1672    ok_v_ssl_rand_file,
1673    ok_v_ssl_verify,
1674    ok_v_stealthmua,
1675
1676    ok_v_TERM,                          /* {env=1} */
1677    ok_v_TMPDIR,                        /* {import=1,defval=VAL_TMPDIR} */
1678    ok_v_termcap,
1679    ok_b_termcap_disable,
1680    ok_v_toplines,                      /* {notempty=1,num=1,defval="5"} */
1681    ok_b_topsqueeze,
1682    ok_v_ttycharset,
1683    ok_b_typescript_mode,               /* {vip=1} */
1684
1685    ok_v_USER,                          /* {rdonly=1,import=1} */
1686    ok_v_umask,                      /* {vip=1,nodel=1,posnum=1,i3val="0077"} */
1687    ok_v_user,
1688
1689    ok_v_VISUAL,                        /* {env=1,defval=VAL_VISUAL} */
1690    ok_b_v15_compat,
1691    ok_b_verbose,                       /* {vip=1} */
1692    ok_v_version,                       /* {virt=VERSION} */
1693    ok_v_version_major,                 /* {virt=VERSION_MAJOR} */
1694    ok_v_version_minor,                 /* {virt=VERSION_MINOR} */
1695    ok_v_version_update,                /* {virt=VERSION_UPDATE} */
1696
1697    ok_b_writebackedited
1698 };
1699
1700 /* Locale-independent character classes */
1701 enum {
1702    C_CNTRL        = 1<<0,
1703    C_BLANK        = 1<<1,
1704    C_WHITE        = 1<<2,
1705    C_SPACE        = 1<<3,
1706    C_PUNCT        = 1<<4,
1707    C_OCTAL        = 1<<5,
1708    C_DIGIT        = 1<<6,
1709    C_UPPER        = 1<<7,
1710    C_LOWER        = 1<<8
1711 };
1712
1713 struct str {
1714    char     *s;      /* the string's content */
1715    size_t   l;       /* the stings's length */
1716 };
1717
1718 struct n_string{
1719    char *s_dat;         /*@ May contain NULs, not automatically terminated */
1720    ui32_t s_len;        /*@ gth of string */
1721 #ifdef HAVE_BYTE_ORDER_LITTLE
1722    ui32_t s_auto : 1;   /* Stored in auto-reclaimed storage? */
1723 #endif
1724    ui32_t s_size : 31;  /* of .s_dat, -1 */
1725 #ifndef HAVE_BYTE_ORDER_LITTLE
1726    ui32_t s_auto : 1;
1727 #endif
1728 };
1729
1730 struct n_strlist{
1731    struct n_strlist *sl_next;
1732    size_t sl_len;
1733    char sl_dat[VFIELD_SIZE(0)];
1734 };
1735 #define n_STRLIST_MALLOC(SZ) /* XXX -> nailfuns.h (and pimp interface) */\
1736    smalloc(sizeof(struct n_strlist) - \
1737       VFIELD_SIZEOF(struct n_strlist, sl_dat) + (SZ) +1)
1738
1739 struct bidi_info {
1740    struct str  bi_start;      /* Start of (possibly) bidirectional text */
1741    struct str  bi_end;        /* End of ... */
1742    size_t      bi_pad;        /* No of visual columns to reserve for BIDI pad */
1743 };
1744
1745 struct n_cmd_arg_desc{
1746    char cad_name[12];   /* Name of command */
1747    ui32_t cad_no;       /* Number of entries in cad_ent_flags */
1748    /* [enum n_cmd_arg_desc_flags,arg-dep] */
1749    ui32_t cad_ent_flags[VFIELD_SIZE(0)][2];
1750 };
1751 /* ISO C(99) doesn't allow initialization of "flex array" */
1752 #define n_CMD_ARG_DESC_SUBCLASS_DEF(CMD,NO,VAR) \
1753    struct n_cmd_arg_desc_ ## CMD {\
1754       char cad_name[12];\
1755       ui32_t cad_no;\
1756       ui32_t cad_ent_flags[NO][2];\
1757    } const VAR = { #CMD, NO,
1758 #define n_CMD_ARG_DESC_SUBCLASS_DEF_END }
1759 #define n_CMD_ARG_DESC_SUBCLASS_CAST(P) ((struct n_cmd_arg_desc const*)P)
1760
1761 struct n_cmd_arg_ctx{
1762    struct n_cmd_arg_desc const *cac_desc;
1763    char const *cac_indat;     /* Input that shall be parsed */
1764    size_t cac_inlen;          /* Input length (UIZ_MAX: do a strlen()) */
1765    size_t cac_no;             /* Output: number of parsed arguments */
1766    struct n_cmd_arg *cac_arg; /* Output: parsed arguments */
1767 };
1768
1769 struct n_cmd_arg{/* TODO incomplete, misses getmsglist() */
1770    struct n_cmd_arg *ca_next;
1771    char const *ca_indat;   /* Pointer into n_cmd_arg_ctx.cac_indat */
1772    size_t ca_inlen;        /* of .ca_indat of this arg (not terminated) */
1773    ui32_t ca_ent_flags[2]; /* Copy of n_cmd_arg_desc.cad_ent_flags[X] */
1774    ui32_t ca_arg_flags;    /* [Output: _WYSH: copy of parse result flags] */
1775    ui8_t ca__dummy[4];
1776    union{
1777       struct str ca_str;      /* _STRING, _WYSH */
1778    } ca_arg;               /* Output: parsed result */
1779 };
1780
1781 #ifdef HAVE_COLOUR
1782 struct n_colour_pen;
1783 #endif
1784
1785 struct url {
1786    char const     *url_input;       /* Input as given (really) */
1787    enum cproto    url_cproto;       /* Communication protocol as given */
1788    bool_t         url_needs_tls;    /* Whether the protocol uses SSL/TLS */
1789    bool_t         url_had_user;     /* Whether .url_user was part of the URL */
1790    ui16_t         url_portno;       /* atoi .url_port or default, host endian */
1791    char const     *url_port;        /* Port (if given) or NULL */
1792    char           url_proto[14];    /* Communication protocol as 'xy\0//' */
1793    ui8_t          url_proto_len;    /* Length of .url_proto ('\0' index) */
1794    ui8_t          url_proto_xlen;   /* .. if '\0' is replaced with ':' */
1795    struct str     url_user;         /* User, exactly as given / looked up */
1796    struct str     url_user_enc;     /* User, urlxenc()oded */
1797    struct str     url_pass;         /* Pass (urlxdec()oded) or NULL */
1798    struct str     url_host;         /* Service hostname */
1799    struct str     url_path;         /* Path suffix or NULL */
1800    /* TODO: url_get_component(url *, enum COMPONENT, str *store) */
1801    struct str     url_h_p;          /* .url_host[:.url_port] */
1802    /* .url_user@.url_host
1803     * Note: for CPROTO_SMTP this may resolve HOST via *smtp-hostname* (->
1804     * *hostname*)!  (And may later be overwritten according to *from*!) */
1805    struct str     url_u_h;
1806    struct str     url_u_h_p;        /* .url_user@.url_host[:.url_port] */
1807    struct str     url_eu_h_p;       /* .url_user_enc@.url_host[:.url_port] */
1808    char const     *url_p_u_h_p;     /* .url_proto://.url_u_h_p */
1809    char const     *url_p_eu_h_p;    /* .url_proto://.url_eu_h_p */
1810    char const     *url_p_eu_h_p_p;  /* .url_proto://.url_eu_h_p[/.url_path] */
1811 };
1812
1813 struct ccred {
1814    enum cproto    cc_cproto;     /* Communication protocol */
1815    enum authtype  cc_authtype;   /* Desired authentication */
1816    char const     *cc_auth;      /* Authentication type as string */
1817    struct str     cc_user;       /* User (urlxdec()oded) or NULL */
1818    struct str     cc_pass;       /* Password (urlxdec()oded) or NULL */
1819 };
1820
1821 #ifdef HAVE_DOTLOCK
1822 struct n_dotlock_info{
1823    char const *di_file_name;  /* Mailbox to lock */
1824    char const *di_lock_name;  /* .di_file_name + .lock */
1825    char const *di_hostname;   /* ..filled in parent (due resolver delays) */
1826    char const *di_randstr;    /* ..ditto, random string */
1827    size_t di_pollmsecs;       /* Delay in between locking attempts */
1828    struct stat *di_stb;
1829 };
1830 #endif
1831
1832 /* Execution context bundles  */
1833 struct n_exec_ctx{
1834
1835    void *l_smem;                 /* salloc() memory TODO -> memraw? */
1836    /* TODO our new per-exec-ctx memory "allocators" are yet very dumb.
1837     * TODO for v15 those should not be wrapping nodes but real allocators */
1838    struct n_mem_raw *l_memraw;   /* n_mem_alloc() (/ n_mem_free()) */
1839    struct n_mem_wrap *l_memwrap; /* n_mem_wrap() (/ n_mem_unwrap()) */
1840 };
1841
1842 struct n_mem_raw{
1843    struct n_mem_raw *mr_prev;
1844    struct n_mem_raw *mr_next;
1845    char mr_buf[VFIELD_SIZE(0)];
1846 };
1847
1848 struct n_mem_wrap{
1849    struct n_mem_wrap *mw_prev;
1850    struct n_mem_wrap *mw_next;
1851    void *mw_obj;
1852    void (*mw_dtor)(void *obj);
1853 };
1854
1855 struct mime_handler {
1856    enum mime_handler_flags mh_flags;
1857    struct str  mh_msg;           /* Message describing this command */
1858    /* XXX union{} the following? */
1859    char const  *mh_shell_cmd;    /* For MIME_HDL_CMD */
1860    int         (*mh_ptf)(void);  /* PTF main() for MIME_HDL_PTF */
1861 };
1862
1863 struct quoteflt {
1864    FILE        *qf_os;        /* Output stream */
1865    char const  *qf_pfix;
1866    ui32_t      qf_pfix_len;   /* Length of prefix: 0: bypass */
1867    ui32_t      qf_qfold_min;  /* Simple way: wrote prefix? */
1868    /* TODO quoteflt.qf_nl_last is a hack that i have introduced so that we
1869     * TODO finally can gracefully place a newline last in the visual display.
1870     * TODO I.e., for cases where quoteflt shouldn't be used at all ;} */
1871    bool_t      qf_nl_last;    /* Last thing written/seen was NL */
1872 #ifndef HAVE_QUOTE_FOLD
1873    ui8_t       __dummy[7];
1874 #else
1875    ui8_t       __dummy[1];
1876    ui8_t       qf_state;      /* *quote-fold* state machine */
1877    bool_t      qf_brk_isws;   /* Breakpoint is at WS */
1878    ui32_t      qf_qfold_max;  /* Otherwise: line lengths */
1879    ui32_t      qf_wscnt;      /* Whitespace count */
1880    ui32_t      qf_brkl;       /* Breakpoint */
1881    ui32_t      qf_brkw;       /* Visual width, breakpoint */
1882    ui32_t      qf_datw;       /* Current visual output line width */
1883    struct str  qf_dat;        /* Current visual output line */
1884    struct str  qf_currq;      /* Current quote, compressed */
1885    mbstate_t   qf_mbps[2];
1886 #endif
1887 };
1888
1889 #ifdef HAVE_FILTER_HTML_TAGSOUP
1890 struct htmlflt {
1891    FILE        *hf_os;        /* Output stream */
1892    ui32_t      hf_flags;
1893    ui32_t      hf_lmax;       /* Maximum byte +1 in .hf_line/4 */
1894    ui32_t      hf_len;        /* Current bytes in .hf_line */
1895    ui32_t      hf_last_ws;    /* Last whitespace on line (fold purposes) */
1896    ui32_t      hf_mboff;      /* Last offset for "mbtowc" */
1897    ui32_t      hf_mbwidth;    /* We count characters not bytes if possible */
1898    char        *hf_line;      /* Output line buffer - MUST be last field! */
1899    si32_t      hf_href_dist;  /* Count of lines since last HREF flush */
1900    ui32_t      hf_href_no;    /* HREF sequence number */
1901    struct htmlflt_href *hf_hrefs;
1902    struct htmlflt_tag const *hf_ign_tag; /* Tag that will end ignore mode */
1903    char        *hf_curr;      /* Current cursor into .hf_bdat */
1904    char        *hf_bmax;      /* Maximum byte in .hf_bdat +1 */
1905    char        *hf_bdat;      /* (Temporary) Tag content data storage */
1906 };
1907 #endif
1908
1909 struct search_expr {
1910    char const  *ss_where;     /* ..to search for the expr. (not always used) */
1911    char const  *ss_sexpr;     /* String search expr.; NULL: use .ss_regex */
1912 #ifdef HAVE_REGEX
1913    regex_t     ss_regex;
1914 #endif
1915 };
1916
1917 /* This is somewhat temporary for pre v15 */
1918 struct n_sigman{
1919    ui32_t sm_flags;           /* enum n_sigman_flags */
1920    int sm_signo;
1921    struct n_sigman *sm_outer;
1922    sighandler_type sm_ohup;
1923    sighandler_type sm_oint;
1924    sighandler_type sm_oquit;
1925    sighandler_type sm_oterm;
1926    sighandler_type sm_opipe;
1927    sigjmp_buf sm_jump;
1928 };
1929
1930 struct termios_state {
1931    struct termios ts_tios;
1932    char        *ts_linebuf;
1933    size_t      ts_linesize;
1934    bool_t      ts_needs_reset;
1935 };
1936
1937 #define termios_state_reset() \
1938 do {\
1939    if (termios_state.ts_needs_reset) {\
1940       tcsetattr(0, TCSADRAIN, &termios_state.ts_tios);\
1941       termios_state.ts_needs_reset = FAL0;\
1942    }\
1943 } while (0)
1944
1945 #ifdef n_HAVE_TCAP
1946 struct n_termcap_value{
1947    enum n_termcap_captype tv_captype;
1948    ui8_t tv__dummy[4];
1949    union n_termcap_value_data{
1950       bool_t tvd_bool;
1951       ui32_t tvd_numeric;
1952       char const *tvd_string;
1953    } tv_data;
1954 };
1955 #endif
1956
1957 struct n_visual_info_ctx{
1958    char const *vic_indat;  /*I Input data */
1959    size_t vic_inlen;       /*I If UIZ_MAX, strlen(.vic_indat) */
1960    char const *vic_oudat;  /*O remains */
1961    size_t vic_oulen;
1962    size_t vic_chars_seen;  /*O number of characters processed */
1963    size_t vic_bytes_seen;  /*O number of bytes passed */
1964    size_t vic_vi_width;    /*[O] visual width of the entire range */
1965    wc_t *vic_woudat;       /*[O] if so requested */
1966    size_t vic_woulen;      /*[O] entries in .vic_woudat, if used */
1967    wc_t vic_waccu;         /*O The last wchar_t/char processed (if any) */
1968    enum n_visual_info_flags vic_flags; /*O Copy of parse flags */
1969    /* TODO bidi */
1970 #ifdef HAVE_C90AMEND1
1971    mbstate_t *vic_mbstate; /*IO .vic_mbs_def used if NULL */
1972    mbstate_t vic_mbs_def;
1973 #endif
1974 };
1975
1976 struct time_current {
1977    time_t      tc_time;
1978    struct tm   tc_gm;
1979    struct tm   tc_local;
1980    char        tc_ctime[32];
1981 };
1982
1983 struct sock {                 /* data associated with a socket */
1984    int         s_fd;          /* file descriptor */
1985 #ifdef HAVE_SSL
1986    int         s_use_ssl;     /* SSL is used */
1987 # ifdef HAVE_SSL_TLS
1988    void        *s_ssl;        /* SSL object */
1989 # endif
1990 #endif
1991    char        *s_wbuf;       /* for buffered writes */
1992    int         s_wbufsize;    /* allocated size of s_buf */
1993    int         s_wbufpos;     /* position of first empty data byte */
1994    char        *s_rbufptr;    /* read pointer to s_rbuf */
1995    int         s_rsz;         /* size of last read in s_rbuf */
1996    char const  *s_desc;       /* description of error messages */
1997    void        (*s_onclose)(void);     /* execute on close */
1998    char        s_rbuf[LINESIZE + 1];   /* for buffered reads */
1999 };
2000
2001 struct sockconn {
2002    struct url     sc_url;
2003    struct ccred   sc_cred;
2004    struct sock    sc_sock;
2005 };
2006
2007 struct mailbox {
2008    enum {
2009       MB_NONE     = 000,      /* no reply expected */
2010       MB_COMD     = 001,      /* command reply expected */
2011       MB_MULT     = 002,      /* multiline reply expected */
2012       MB_PREAUTH  = 004,      /* not in authenticated state */
2013       MB_BYE      = 010,      /* may accept a BYE state */
2014       MB_FROM__WARNED = 1<<4  /* MBOX with invalid from seen & logged */
2015    }           mb_active;
2016    FILE        *mb_itf;       /* temp file with messages, read open */
2017    FILE        *mb_otf;       /* same, write open */
2018    char        *mb_sorted;    /* sort method */
2019    enum {
2020       MB_VOID,       /* no type (e. g. connection failed) */
2021       MB_FILE,       /* local file */
2022       MB_POP3,       /* POP3 mailbox */
2023       MB_MAILDIR     /* maildir folder */
2024    }           mb_type;       /* type of mailbox */
2025    enum {
2026       MB_DELE = 01,  /* may delete messages in mailbox */
2027       MB_EDIT = 02   /* may edit messages in mailbox */
2028    }           mb_perm;
2029    int mb_threaded;           /* mailbox has been threaded */
2030    struct sock mb_sock;       /* socket structure */
2031 };
2032
2033 enum needspec {
2034    NEED_UNSPEC,      /* unspecified need, don't fetch */
2035    NEED_HEADER,      /* need the header of a message */
2036    NEED_BODY         /* need header and body of a message */
2037 };
2038
2039 enum havespec {
2040    HAVE_NOTHING,              /* nothing downloaded yet */
2041    HAVE_HEADER    = 01,       /* header is downloaded */
2042    HAVE_BODY      = 02        /* entire message is downloaded */
2043 };
2044
2045 /* flag bits. Attention: Flags that are used in cache.c may not change */
2046 enum mflag {
2047    MUSED          = (1<< 0),  /* entry is used, but this bit isn't */
2048    MDELETED       = (1<< 1),  /* entry has been deleted */
2049    MSAVED         = (1<< 2),  /* entry has been saved */
2050    MTOUCH         = (1<< 3),  /* entry has been noticed */
2051    MPRESERVE      = (1<< 4),  /* keep entry in sys mailbox */
2052    MMARK          = (1<< 5),  /* message is marked! */
2053    MODIFY         = (1<< 6),  /* message has been modified */
2054    MNEW           = (1<< 7),  /* message has never been seen */
2055    MREAD          = (1<< 8),  /* message has been read sometime. */
2056    MSTATUS        = (1<< 9),  /* message status has changed */
2057    MBOX           = (1<<10),  /* Send this to mbox, regardless */
2058    MNOFROM        = (1<<11),  /* no From line */
2059    MHIDDEN        = (1<<12),  /* message is hidden to user */
2060    MBOXED         = (1<<13),  /* message has been sent to mbox */
2061    MNEWEST        = (1<<14),  /* message is very new (newmail) */
2062    MFLAG          = (1<<15),  /* message has been flagged recently */
2063    MUNFLAG        = (1<<16),  /* message has been unflagged */
2064    MFLAGGED       = (1<<17),  /* message is `flagged' */
2065    MANSWER        = (1<<18),  /* message has been answered recently */
2066    MUNANSWER      = (1<<19),  /* message has been unanswered */
2067    MANSWERED      = (1<<20),  /* message is `answered' */
2068    MDRAFT         = (1<<21),  /* message has been drafted recently */
2069    MUNDRAFT       = (1<<22),  /* message has been undrafted */
2070    MDRAFTED       = (1<<23),  /* message is marked as `draft' */
2071    MOLDMARK       = (1<<24),  /* messages was marked previously */
2072    MSPAM          = (1<<25),  /* message is classified as spam */
2073    MSPAMUNSURE    = (1<<26)   /* message may be spam, but it is unsure */
2074 };
2075 #define MMNORM          (MDELETED | MSAVED | MHIDDEN)
2076 #define MMNDEL          (MDELETED | MHIDDEN)
2077
2078 #define visible(mp)     (((mp)->m_flag & MMNDEL) == 0)
2079
2080 struct mimepart {
2081    enum mflag  m_flag;        /* flags */
2082    enum havespec m_have;      /* downloaded parts of the part */
2083 #ifdef HAVE_SPAM
2084    ui32_t      m_spamscore;   /* Spam score as int, 24:8 bits */
2085 #endif
2086    int         m_block;       /* block number of this part */
2087    size_t      m_offset;      /* offset in block of part */
2088    size_t      m_size;        /* Bytes in the part */
2089    size_t      m_xsize;       /* Bytes in the full part */
2090    long        m_lines;       /* Lines in the message */
2091    long        m_xlines;      /* Lines in the full message */
2092    time_t      m_time;        /* time the message was sent */
2093    char const  *m_from;       /* message sender */
2094    struct mimepart *m_nextpart;     /* next part at same level */
2095    struct mimepart *m_multipart;    /* parts of multipart */
2096    struct mimepart *m_parent;       /* enclosing multipart part */
2097    char const  *m_ct_type;          /* content-type */
2098    char const  *m_ct_type_plain;    /* content-type without specs */
2099    char const  *m_ct_type_usr_ovwr; /* Forcefully overwritten one */
2100    enum mimecontent m_mimecontent;  /* same in enum */
2101    char const  *m_charset;    /* charset */
2102    char const  *m_ct_enc;     /* content-transfer-encoding */
2103    enum mime_enc m_mime_enc;     /* same in enum */
2104    char        *m_partstring; /* part level string */
2105    char        *m_filename;   /* attachment filename */
2106 };
2107
2108 struct message {
2109    enum mflag  m_flag;        /* flags */
2110    enum havespec m_have;      /* downloaded parts of the message */
2111 #ifdef HAVE_SPAM
2112    ui32_t      m_spamscore;   /* Spam score as int, 24:8 bits */
2113 #endif
2114    int         m_block;       /* block number of this message */
2115    size_t      m_offset;      /* offset in block of message */
2116    size_t      m_size;        /* Bytes in the message */
2117    size_t      m_xsize;       /* Bytes in the full message */
2118    long        m_lines;       /* Lines in the message */
2119    long        m_xlines;      /* Lines in the full message */
2120    time_t      m_time;        /* time the message was sent */
2121    time_t      m_date;        /* time in the 'Date' field */
2122    unsigned    m_idhash;      /* hash on Message-ID for threads */
2123    struct message *m_child;   /* first child of this message */
2124    struct message *m_younger; /* younger brother of this message */
2125    struct message *m_elder;   /* elder brother of this message */
2126    struct message *m_parent;  /* parent of this message */
2127    unsigned    m_level;       /* thread level of message */
2128    long        m_threadpos;   /* position in threaded display */
2129    char        *m_maildir_file;  /* original maildir file of msg */
2130    ui32_t      m_maildir_hash;   /* hash of file name in maildir sub */
2131    int         m_collapsed;      /* collapsed thread information */
2132 };
2133
2134 /* Given a file address, determine the block number it represents */
2135 #define mailx_blockof(off)                ((int) ((off) / 4096))
2136 #define mailx_offsetof(off)               ((int) ((off) % 4096))
2137 #define mailx_positionof(block, offset)   ((off_t)(block) * 4096 + (offset))
2138
2139 /* Argument types */
2140 enum argtype {
2141    ARG_MSGLIST    = 0,        /* Message list type */
2142    ARG_STRLIST    = 1,        /* A pure string */
2143    ARG_RAWLIST    = 2,        /* getrawlist(), old style */
2144    ARG_NOLIST     = 3,        /* Just plain 0 */
2145    ARG_NDMLIST    = 4,        /* Message list, no defaults */
2146    ARG_WYSHLIST   = 5,        /* getrawlist(), sh(1) compatible */
2147      ARG_WYRALIST = 6,        /* _RAWLIST or _WYSHLIST (with `wysh') */
2148    ARG_ARGMASK    = 7,        /* Mask of the above */
2149
2150    ARG_A          = 1u<< 4,   /* Needs an active mailbox */
2151    ARG_F          = 1u<< 5,   /* Is a conditional command */
2152    ARG_G          = 1u<< 6,   /* Is supposed to produce "gabby" history */
2153    ARG_H          = 1u<< 7,   /* Never place in `history' */
2154    ARG_I          = 1u<< 8,   /* Interactive command bit */
2155    ARG_M          = 1u<< 9,   /* Legal from send mode bit */
2156    ARG_P          = 1u<<10,   /* Autoprint dot after command */
2157    ARG_R          = 1u<<11,   /* Cannot be called from collect / recursion */
2158    ARG_S          = 1u<<12,   /* Cannot be called unless PS_STARTED (POSIX) */
2159    ARG_T          = 1u<<13,   /* Is a transparent command */
2160    ARG_V          = 1u<<14,   /* Places data in temporary_arg_v_store */
2161    ARG_W          = 1u<<15,   /* Invalid when read only bit */
2162    ARG_O          = 1u<<16    /* OBSOLETE()d command */
2163 };
2164
2165 enum gfield {
2166    GTO            = 1<< 0,    /* Grab To: line */
2167    GSUBJECT       = 1<< 1,    /* Likewise, Subject: line */
2168    GCC            = 1<< 2,    /* And the Cc: line */
2169    GBCC           = 1<< 3,    /* And also the Bcc: line */
2170
2171    GNL            = 1<< 4,    /* Print blank line after */
2172    GDEL           = 1<< 5,    /* Entity removed from list */
2173    GCOMMA         = 1<< 6,    /* detract() puts in commas */
2174    GUA            = 1<< 7,    /* User-Agent field */
2175    GMIME          = 1<< 8,    /* MIME 1.0 fields */
2176    GMSGID         = 1<< 9,    /* a Message-ID */
2177    GNAMEONLY      = 1<<10,    /* detract() does NOT use fullnames */
2178
2179    GIDENT         = 1<<11,    /* From:, Reply-To:, MFT: (user headers) */
2180    GREF           = 1<<12,    /* References:, In-Reply-To:, (Message-ID:) */
2181    GDATE          = 1<<13,    /* Date: field */
2182    GFULL          = 1<<14,    /* Include full names, comments etc. */
2183    GSKIN          = 1<<15,    /* Skin names */
2184    GEXTRA         = 1<<16,    /* Extra fields (mostly like GIDENT XXX) */
2185    GFILES         = 1<<17,    /* Include filename and pipe addresses */
2186    GFULLEXTRA     = 1<<18     /* Only with GFULL: GFULL less address */
2187 };
2188 #define GMASK           (GTO | GSUBJECT | GCC | GBCC)
2189
2190 enum header_flags {
2191    HF_NONE        = 0,
2192    HF_LIST_REPLY  = 1<< 0,
2193    HF_MFT_SENDER  = 1<< 1,    /* Add ourselves to Mail-Followup-To: */
2194    HF_RECIPIENT_RECORD = 1<<10, /* Save message in file named after rec. */
2195    HF__NEXT_SHIFT = 11
2196 };
2197
2198 /* Structure used to pass about the current state of a message (header) */
2199 struct n_header_field{
2200    struct n_header_field *hf_next;
2201    ui32_t hf_nl;              /* Field-name length */
2202    ui32_t hf_bl;              /* Field-body length*/
2203    char hf_dat[VFIELD_SIZE(0)];
2204 };
2205
2206 struct header {
2207    ui32_t      h_flags;       /* enum header_flags bits */
2208    ui32_t      h_dummy;
2209    struct name *h_to;         /* Dynamic "To:" string */
2210    char        *h_subject;    /* Subject string */
2211    struct name *h_cc;         /* Carbon copies string */
2212    struct name *h_bcc;        /* Blind carbon copies */
2213    struct name *h_ref;        /* References (possibly overridden) */
2214    struct attachment *h_attach; /* MIME attachments */
2215    char        *h_charset;    /* preferred charset */
2216    struct name *h_from;       /* overridden "From:" field */
2217    struct name *h_sender;     /* overridden "Sender:" field */
2218    struct name *h_replyto;    /* overridden "Reply-To:" field */
2219    struct name *h_message_id; /* overridden "Message-ID:" field */
2220    struct name *h_in_reply_to;/* overridden "In-Reply-To:" field */
2221    struct name *h_mft;        /* Mail-Followup-To */
2222    char const  *h_list_post;  /* Address from List-Post:, for `Lreply' */
2223    struct n_header_field *h_user_headers;
2224    struct n_header_field *h_custom_headers; /* (Cached result) */
2225 };
2226
2227 /* Handling of namelist nodes used in processing the recipients of mail and
2228  * aliases, inspection of mail-addresses and all that kind of stuff */
2229 enum nameflags {
2230    NAME_NAME_SALLOC        = 1<< 0, /* .n_name is doped */
2231    NAME_FULLNAME_SALLOC    = 1<< 1, /* .n_fullname is doped */
2232    NAME_SKINNED            = 1<< 2, /* Is actually skin()ned */
2233    NAME_IDNA               = 1<< 3, /* IDNA was applied */
2234
2235    NAME_ADDRSPEC_CHECKED   = 1<< 4, /* Address has been .. and */
2236    NAME_ADDRSPEC_ISFILE    = 1<< 5, /* ..is a file path */
2237    NAME_ADDRSPEC_ISPIPE    = 1<< 6, /* ..is a command for piping */
2238    NAME_ADDRSPEC_ISFILEORPIPE = NAME_ADDRSPEC_ISFILE | NAME_ADDRSPEC_ISPIPE,
2239    NAME_ADDRSPEC_ISNAME    = 1<< 7, /* ..is a valid mail network address */
2240    NAME_ADDRSPEC_ISADDR    = 1<< 8, /* ..is a valid mail network address */
2241
2242    NAME_ADDRSPEC_ERR_EMPTY = 1<< 9, /* An empty string (or NULL) */
2243    NAME_ADDRSPEC_ERR_ATSEQ = 1<<10, /* Weird @ sequence */
2244    NAME_ADDRSPEC_ERR_CHAR  = 1<<11, /* Invalid character */
2245    NAME_ADDRSPEC_ERR_IDNA  = 1<<12, /* IDNA convertion failed */
2246    NAME_ADDRSPEC_INVALID   = NAME_ADDRSPEC_ERR_EMPTY |
2247          NAME_ADDRSPEC_ERR_ATSEQ | NAME_ADDRSPEC_ERR_CHAR |
2248          NAME_ADDRSPEC_ERR_IDNA,
2249
2250    /* Error storage (we must fit in 31-bit) */
2251    _NAME_SHIFTWC  = 13,
2252    _NAME_MAXWC    = 0x3FFFF,
2253    _NAME_MASKWC   = _NAME_MAXWC << _NAME_SHIFTWC
2254 };
2255
2256 /* In the !_ERR_EMPTY case, the failing character can be queried */
2257 #define NAME_ADDRSPEC_ERR_GETWC(F)  \
2258    ((((unsigned int)(F) & _NAME_MASKWC) >> _NAME_SHIFTWC) & _NAME_MAXWC)
2259 #define NAME_ADDRSPEC_ERR_SET(F, E, WC) \
2260 do {\
2261    (F) = ((F) & ~(NAME_ADDRSPEC_INVALID | _NAME_MASKWC)) |\
2262          (E) | (((unsigned int)(WC) & _NAME_MAXWC) << _NAME_SHIFTWC);\
2263 } while (0)
2264
2265 struct name {
2266    struct name *n_flink;      /* Forward link in list. */
2267    struct name *n_blink;      /* Backward list link */
2268    enum gfield n_type;        /* From which list it came */
2269    enum nameflags n_flags;    /* enum nameflags */
2270    char        *n_name;       /* This fella's address */
2271    char        *n_fullname;   /* Ditto, unless GFULL including comment */
2272    char        *n_fullextra;  /* GFULL, without address */
2273 };
2274
2275 struct addrguts {
2276    char const  *ag_input;     /* Input string as given */
2277    size_t      ag_ilen;       /* strlen() of input */
2278    size_t      ag_iaddr_start; /* Start of *addr-spec* in .ag_input */
2279    size_t      ag_iaddr_aend; /* ..and one past its end */
2280    char        *ag_skinned;   /* Output (alloced if !=.ag_input) */
2281    size_t      ag_slen;       /* strlen() of .ag_skinned */
2282    size_t      ag_sdom_start; /* Start of domain in .ag_skinned, */
2283    enum nameflags ag_n_flags; /* enum nameflags of .ag_skinned */
2284 };
2285
2286 /* MIME attachments */
2287 enum attach_conv {
2288    AC_DEFAULT,       /* _get_lc() -> _iter_*() */
2289    AC_FIX_OUTCS,     /* _get_lc() -> "charset=" .a_charset */
2290    AC_FIX_INCS,      /* "charset=".a_input_charset (nocnv) */
2291    AC_TMPFILE        /* attachment.a_tmpf is converted */
2292 };
2293
2294 struct attachment {
2295    struct attachment *a_flink;   /* Forward link in list. */
2296    struct attachment *a_blink;   /* Backward list link */
2297    char const  *a_name;       /* file name */
2298    char const  *a_content_type;  /* content type */
2299    char const  *a_content_disposition; /* content disposition */
2300    char const  *a_content_id; /* content id */
2301    char const  *a_content_description; /* content description */
2302    char const  *a_input_charset; /* Interpretation depends on .a_conv */
2303    char const  *a_charset;    /* ... */
2304    FILE        *a_tmpf;       /* If AC_TMPFILE */
2305    enum attach_conv a_conv;   /* User chosen conversion */
2306    int         a_msgno;       /* message number */
2307 };
2308
2309 struct sendbundle {
2310    struct header  *sb_hp;
2311    struct name    *sb_to;
2312    FILE           *sb_input;
2313    struct str     sb_signer;  /* USER@HOST for signing+ */
2314    struct url     sb_url;
2315    struct ccred   sb_ccred;
2316 };
2317
2318 /* Structure of the hash table of ignored header fields */
2319 struct ignoretab{
2320    ui32_t it_count;
2321    bool_t it_auto;     /* Stored in auto-reclaimed storage? */
2322    ui8_t it__dummy[3];
2323    struct n_ignoretab_field{
2324       struct n_ignoretab_field *itf_next;
2325       char itf_field[VFIELD_SIZE(0)];     /* Header field */
2326    } *it_head[5 /* TODO make dynamic hashmap */];
2327 };
2328
2329 /* For saving the current directory and later returning */
2330 struct cw {
2331 #ifdef HAVE_FCHDIR
2332    int         cw_fd;
2333 #else
2334    char        cw_wd[PATH_MAX];
2335 #endif
2336 };
2337
2338 /*
2339  * Global variable declarations
2340  *
2341  * These become instantiated in main.c.
2342  */
2343
2344 #undef VL
2345 #ifdef n_MAIN_SOURCE
2346 # ifndef HAVE_AMALGAMATION
2347 #  define VL
2348 # else
2349 #  define VL            static
2350 # endif
2351 #else
2352 # define VL             extern
2353 #endif
2354
2355 VL int         mb_cur_max;          /* Value of MB_CUR_MAX */
2356 VL int         realscreenheight;    /* The real screen height */
2357 VL int         scrnwidth;           /* Screen width, or best guess */
2358 VL int         scrnheight;          /* Screen height/guess (4 header) */
2359
2360 VL char const  *myname;             /* My login name */
2361 VL char const  *progname;           /* Our name */
2362
2363 VL gid_t       group_id;            /* getgid() and getuid() */
2364 VL uid_t       user_id;
2365
2366 VL int         exit_status;         /* Exit status */
2367 VL ui32_t      options;             /* Bits of enum user_options */
2368 VL char const *option_Mm_arg;       /* Argument for -[Mm] aka OPT_[Mm]_FLAG */
2369 VL struct name *option_r_arg;       /* Argument to -r option */
2370 VL char const  **smopts;            /* sendmail(1) opts from commline */
2371 VL size_t      smopts_cnt;          /* Entries in smopts */
2372
2373 VL ui32_t      pstate;              /* Bits of enum program_state */
2374 VL size_t      noreset;             /* String resets suspended (recursive) */
2375
2376 /* XXX stylish sorting */
2377 VL int            msgCount;            /* Count of messages read in */
2378 VL struct mailbox mb;                  /* Current mailbox */
2379 VL int            image;               /* File descriptor for msg image */
2380 VL char           mailname[PATH_MAX];  /* Name of current file TODO URL/object*/
2381 VL char           displayname[80 - 40]; /* Prettyfied for display TODO URL/obj*/
2382 VL char           prevfile[PATH_MAX];  /* Name of previous file TODO URL/obj */
2383 VL char const     *account_name;       /* Current account name or NULL */
2384 VL off_t          mailsize;            /* Size of system mailbox */
2385 VL struct message *dot;                /* Pointer to current message */
2386 VL struct message *prevdot;            /* Previous current message */
2387 VL struct message *message;            /* The actual message structure */
2388 VL struct message *threadroot;         /* first threaded message */
2389 VL int            *n_msgvec;           /* Folder setmsize(), list.c res. store*/
2390
2391 VL struct ignoretab  ignore[2];        /* ignored and retained fields
2392                                         * 0 is ignore, 1 is retain */
2393 VL struct ignoretab  saveignore[2];    /* ignored and retained fields
2394                                         * on save to folder */
2395 VL struct ignoretab  fwdignore[2];     /* fields to ignore for forwarding */
2396 #define allignore ((struct ignoretab*)-2) /* special, ignore all headers */
2397
2398 VL struct time_current  time_current;  /* time(3); send: mail1() XXXcarrier */
2399 VL struct termios_state termios_state; /* getpassword(); see commands().. */
2400
2401 #ifdef HAVE_SSL
2402 VL enum ssl_verify_level   ssl_verify_level; /* SSL verification level */
2403 #endif
2404
2405 #ifdef HAVE_ICONV
2406 VL iconv_t     iconvd;
2407 #endif
2408
2409 VL sigjmp_buf  srbuf;
2410 VL int         interrupts;
2411 VL sighandler_type dflpipe;
2412
2413 /* TODO Temporary hacks unless the codebase doesn't jump and uses pass-by-value
2414  * TODO carrier structs instead of locals */
2415 VL char        *temporary_arg_v_store;
2416 /* TODO temporary storage to overcome which_protocol() mess (for PROTO_FILE) */
2417 VL char const  *temporary_protocol_ext;
2418
2419 /* The remaining variables need initialization */
2420
2421 #ifndef HAVE_AMALGAMATION
2422 VL char const  month_names[12 + 1][4];
2423 VL char const  weekday_names[7 + 1][4];
2424
2425 VL char const  uagent[sizeof VAL_UAGENT];
2426
2427 VL ui16_t const class_char[1 + 0x7F];
2428 #endif
2429
2430 /*
2431  * Finally, let's include the function prototypes XXX embed
2432  */
2433
2434 #ifndef n_PRIVSEP_SOURCE
2435 # include "nailfuns.h"
2436 #endif
2437
2438 /* s-it-mode */