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 - 2014 Steffen (Daode) Nurpmeso <sdaoden@users.sf.net>.
   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. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgement:
  21  *    This product includes software developed by the University of
  22  *    California, Berkeley and its contributors.
  23  * 4. Neither the name of the University nor the names of its contributors
  24  *    may be used to endorse or promote products derived from this software
  25  *    without specific prior written permission.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  37  * SUCH DAMAGE.
  38  */
  39
  40 /*
  41  * Mail -- a mail program
  42  *
  43  * Author: Kurt Shoens (UCB) March 25, 1978
  44  */
  45
  46 #include "config.h"
  47
  48 #include <sys/stat.h>
  49 #include <sys/types.h>
  50
  51 #include <errno.h>
  52 #include <limits.h>
  53 #include <setjmp.h>
  54 #include <signal.h>
  55 #include <stdarg.h>
  56 #include <stdio.h>
  57 #include <stdlib.h>
  58 #include <string.h>
  59 #include <termios.h>
  60 #include <time.h>
  61 #include <unistd.h>
  62
  63 #if defined __STDC_VERSION__ && __STDC_VERSION__ + 0 >= 199901L
  64 # include <stdint.h>
  65 #else
  66 # include <inttypes.h>
  67 #endif
  68
  69 #ifdef HAVE_C90AMEND1
  70 # include <wchar.h>
  71 # include <wctype.h>
  72 #endif
  73 #ifdef HAVE_DEBUG
  74 # include <assert.h>
  75 #endif
  76 #ifdef HAVE_ICONV
  77 # include <iconv.h>
  78 #endif
  79 #ifdef HAVE_REGEX
  80 # include <regex.h>
  81 #endif
  82
  83 #ifdef HAVE_OPENSSL_MD5
  84 # include <openssl/md5.h>
  85 #endif
  86
  87 /*
  88  * Constants, some nail-specific macros
  89  */
  90
  91 #if !defined NI_MAXHOST || NI_MAXHOST < 1025
  92 # undef 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 STDIN_FILENO
 106 # define STDIN_FILENO   0
 107 #endif
 108 #ifndef STDOUT_FILENO
 109 # define STDOUT_FILENO  1
 110 #endif
 111 #ifndef STDERR_FILENO
 112 # define STDERR_FILENO  2
 113 #endif
 114
 115 #ifdef NSIG_MAX
 116 # undef NSIG
 117 # define NSIG           NSIG_MAX
 118 #elif !defined NSIG
 119 # define NSIG           ((sizeof(sigset_t) * 8) - 1)
 120 #endif
 121
 122 /*  */
 123
 124 #if BUFSIZ + 0 > 2560               /* TODO simply use BUFSIZ? */
 125 # define LINESIZE       BUFSIZ      /* max readable line width */
 126 #else
 127 # define LINESIZE       2560
 128 #endif
 129 #define BUFFER_SIZE     (BUFSIZ >= (1u << 13) ? BUFSIZ : (1u << 14))
 130
 131 /* Number of Not-Yet-Dead calls that are remembered */
 132 #if defined HAVE_DEBUG || defined HAVE_DEVEL || defined HAVE_NYD2
 133 # ifdef HAVE_NYD2
 134 #  define NYD_CALLS_MAX (25 * 99)
 135 # elif defined HAVE_DEVEL
 136 #  define NYD_CALLS_MAX (25 * 66)
 137 # else
 138 #  define NYD_CALLS_MAX (25 * 33)
 139 # endif
 140 #endif
 141
 142 #define APPEND                   /* New mail goes to end of mailbox */
 143 #define CBAD            (-15555)
 144 #define ESCAPE          '~'      /* Default escape for sending */
 145 #define FIO_STACK_SIZE  20       /* Maximum recursion for sourcing */
 146 #define HIST_SIZE       242      /* tty.c: history list default size */
 147 #define HSHSIZE         23       /* Hash prime TODO make dynamic, obsolete */
 148 #define MAXARGC         1024     /* Maximum list of raw strings */
 149 #define MAXEXP          25       /* Maximum expansion of aliases */
 150 #define PROMPT_BUFFER_SIZE 80    /* getprompt() bufsize (> 3!) */
 151
 152 #define ACCOUNT_NULL    "null"   /* Name of "null" account */
 153 #define MAILRC          "~/.mailrc"
 154 #define NETRC           "~/.netrc"
 155 #define TMPDIR_FALLBACK "/tmp"
 156
 157 /* Some environment variables for pipe hooks */
 158 #define AGENT_USER      "NAIL_USER"
 159 #define AGENT_USER_ENC  "NAIL_USER_ENC"
 160 #define AGENT_HOST      "NAIL_HOST"
 161 #define AGENT_HOST_PORT "NAIL_HOST_PORT"
 162
 163 #undef COLOUR
 164 #ifdef HAVE_COLOUR
 165 # define COLOUR(X)      X
 166 #else
 167 # define COLOUR(X)
 168 #endif
 169 #define COLOUR_MSGINFO  "fg=green"
 170 #define COLOUR_PARTINFO "fg=brown"
 171 #define COLOUR_FROM_    "fg=brown"
 172 #define COLOUR_HEADER   "fg=red"
 173 #define COLOUR_UHEADER  "ft=bold,fg=red"
 174 #define COLOUR_TERMS    \
 175    "cons25,linux,rxvt,rxvt-unicode,screen,sun,vt100,vt220,wsvt25,xterm"
 176 #define COLOUR_USER_HEADERS "from,subject"
 177
 178 #define FROM_DATEBUF    64    /* Size of RFC 4155 From_ line date */
 179 #define DATE_DAYSYEAR   365L
 180 #define DATE_SECSMIN    60L
 181 #define DATE_MINSHOUR   60L
 182 #define DATE_HOURSDAY   24L
 183 #define DATE_SECSDAY    (DATE_SECSMIN * DATE_MINSHOUR * DATE_HOURSDAY)
 184
 185 /* *indentprefix* default as of POSIX */
 186 #define INDENT_DEFAULT  "\t"
 187
 188 /* Default *encoding* as enum conversion below */
 189 #define MIME_DEFAULT_ENCODING CONV_TOQP
 190
 191 /* Maximum allowed line length in a mail before QP folding is necessary), and
 192  * the real limit we go for */
 193 #define MIME_LINELEN_MAX   998   /* Plus CRLF */
 194 #define MIME_LINELEN_LIMIT (MIME_LINELEN_MAX - 48)
 195
 196 /* Ditto, SHOULD */
 197 #define MIME_LINELEN_NORM  78    /* Plus CRLF */
 198
 199 /* And in headers which contain an encoded word according to RFC 2047 there is
 200  * yet another limit */
 201 #define MIME_LINELEN_HEADER_WITH_ENCODED_WORD_MAX 76
 202
 203 /* Locations of mime.types(5) */
 204 #define MIME_TYPES_USR  "~/.mime.types"
 205 #define MIME_TYPES_SYS  "/etc/mime.types"
 206
 207 /* Fallback MIME charsets, if *charset-7bit* and *charset-8bit* or not set */
 208 #define CHARSET_7BIT    "US-ASCII"
 209 #ifdef HAVE_ICONV
 210 # define CHARSET_8BIT      "UTF-8"
 211 # define CHARSET_8BIT_OKEY charset_8bit
 212 #else
 213 # define CHARSET_8BIT      "ISO-8859-1"
 214 # define CHARSET_8BIT_OKEY ttycharset
 215 #endif
 216
 217 /* Some environment variables for pipe hooks */
 218 #define PIPEHOOK_FILENAME           "NAIL_FILENAME"
 219 #define PIPEHOOK_FILENAME_GENERATED "NAIL_FILENAME_GENERATED"
 220 #define PIPEHOOK_CONTENT            "NAIL_CONTENT"
 221 #define PIPEHOOK_CONTENT_EVIDENCE   "NAIL_CONTENT_EVIDENCE"
 222
 223 /* Is *W* a quoting (ASCII only) character? */
 224 #define ISQUOTE(W)      \
 225    ((W) == L'>' || (W) == L'|' || (W) == L'}' || (W) == L':')
 226
 227 /* Maximum number of quote characters (not bytes!) that'll be used on
 228  * follow lines when compressing leading quote characters */
 229 #define QUOTE_MAX       42
 230
 231 /* How much spaces should a <tab> count when *quote-fold*ing? (power-of-two!) */
 232 #define QUOTE_TAB_SPACES 8
 233
 234 /* Maximum size of a message that is passed through to the spam system */
 235 #define SPAM_MAXSIZE    420000
 236
 237 /* String dope: dynamic buffer size, and size of the single builtin one that's
 238  * used first; note that these value include the size of the structure */
 239 #define SBUFFER_SIZE    0x18000u
 240 #define SBUFFER_BUILTIN 0x2000u
 241
 242 /* These come from the configuration (named Xxy to not clash with sh(1)..) */
 243 #ifndef XSHELL
 244 # define XSHELL         "/bin/sh"
 245 #endif
 246 #ifndef XLISTER
 247 # define XLISTER        "ls"
 248 #endif
 249 #ifndef XPAGER
 250 # define XPAGER         "more"
 251 #endif
 252
 253 /*
 254  * CC support, generic macros etc.
 255  */
 256
 257 #ifdef __clang__
 258 # define CC_CLANG          1
 259 # define PREREQ_CLANG(X,Y) \
 260    (__clang_major__ + 0 > (X) || \
 261     (__clang_major__ + 0 == (X) && __clang_minor__ + 0 >= (Y)))
 262 # define __EXTEN           __extension__
 263 #elif defined __GNUC__
 264 # define CC_GCC            1
 265 # define PREREQ_GCC(X,Y)   \
 266    (__GNUC__ + 0 > (X) || (__GNUC__ + 0 == (X) && __GNUC_MINOR__ + 0 >= (Y)))
 267 # define __EXTEN           __extension__
 268 #endif
 269
 270 #ifndef CC_CLANG
 271 # define CC_CLANG          0
 272 # define PREREQ_CLANG(X,Y) 0
 273 #endif
 274 #ifndef CC_GCC
 275 # define CC_GCC            0
 276 # define PREREQ_GCC(X,Y)   0
 277 #endif
 278 #ifndef __EXTEN
 279 # define __EXTEN
 280 #endif
 281
 282 /* Suppress some technical warnings via #pragma's unless developing.
 283  * XXX Wild guesses: clang(1) 1.7 and (OpenBSD) gcc(1) 4.2.1 don't work */
 284 #if !defined HAVE_DEBUG && !defined HAVE_DEVEL
 285 # if PREREQ_CLANG(3, 4)
 286 #  pragma clang diagnostic ignored "-Wunused-result"
 287 #  pragma clang diagnostic ignored "-Wformat"
 288 # elif PREREQ_GCC(4, 7)
 289 #  pragma GCC diagnostic ignored "-Wunused-result"
 290 #  pragma GCC diagnostic ignored "-Wformat"
 291 # endif
 292 #endif
 293
 294 /* For injection macros like DBG(), NATCH_CHAR() */
 295 #define COMMA           ,
 296
 297 #define EMPTY_FILE(F)   typedef int CONCAT(avoid_empty_file__, F);
 298
 299 /* Pointer to size_t */
 300 #define PTR2SIZE(X)     ((size_t)(uintptr_t)(X))
 301
 302 /* Pointer comparison (types from below) */
 303 #define PTRCMP(A,C,B)   ((uintptr_t)(A) C (uintptr_t)(B))
 304
 305 /* Ditto, compare (maybe mixed-signed) integers cases to T bits, unsigned;
 306  * Note: doesn't sign-extend correctly, that's still up to the caller */
 307 #define UICMP(T,A,C,B)  ((ui ## T ## _t)(A) C (ui ## T ## _t)(B))
 308
 309 /* Members in constant array */
 310 #ifndef NELEM
 311 # define NELEM(A)       (sizeof(A) / sizeof(A[0]))
 312 #endif
 313
 314 /* sizeof() for member fields */
 315 #define SIZEOF_FIELD(T,F) sizeof(((T *)NULL)->F)
 316
 317 /* Casts-away (*NOT* cast-away) */
 318 #define UNUSED(X)       ((void)(X))
 319 #define UNCONST(P)      ((void*)(uintptr_t)(void const*)(P))
 320 #define UNVOLATILE(P)   ((void*)(uintptr_t)(void volatile*)(P))
 321 #define UNXXX(T,C,P)    ((T)(uintptr_t)(C)(P))
 322
 323 /* __STDC_VERSION__ is ISO C99, so also use __STDC__, which should work */
 324 #if defined __STDC__ || defined __STDC_VERSION__ /*|| defined __cplusplus*/
 325 # define STRING(X)      #X
 326 # define XSTRING(X)     STRING(X)
 327 # define CONCAT(S1,S2)  _CONCAT(S1, S2)
 328 # define _CONCAT(S1,S2) S1 ## S2
 329 #else
 330 # define STRING(X)      "X"
 331 # define XSTRING        STRING
 332 # define CONCAT(S1,S2)  S1/**/S2
 333 #endif
 334
 335 #if defined __STDC_VERSION__ && __STDC_VERSION__ + 0 >= 199901L
 336   /* Variable size arrays and structure fields */
 337 # define VFIELD_SIZE(X)
 338 # define VFIELD_SIZEOF(T,F) (0)
 339   /* Inline functions */
 340 # define HAVE_INLINE
 341 # define INLINE         inline
 342 # define SINLINE        static inline
 343 #else
 344 # define VFIELD_SIZE(X) (X)
 345 # define VFIELD_SIZEOF(T,F) SIZEOF_FIELD(T, F)
 346 # if CC_CLANG || PREREQ_GCC(2, 9)
 347 #   define INLINE       static __inline
 348 #   define SINLINE      static __inline
 349 # else
 350 #   define INLINE
 351 #   define SINLINE      static
 352 # endif
 353 #endif
 354
 355 #undef __FUN__
 356 #if defined __STDC_VERSION__ && __STDC_VERSION__ + 0 >= 199901L
 357 # define __FUN__        __func__
 358 #elif CC_CLANG || PREREQ_GCC(3, 4)
 359 # define __FUN__        __FUNCTION__
 360 #else
 361 # define __FUN__        uagent   /* Something that is not a literal */
 362 #endif
 363
 364 #if defined __predict_true && defined __predict_false
 365 # define LIKELY(X)      __predict_true(X)
 366 # define UNLIKELY(X)    __predict_false(X)
 367 #elif CC_CLANG || PREREQ_GCC(2, 96)
 368 # define LIKELY(X)      __builtin_expect(X, 1)
 369 # define UNLIKELY(X)    __builtin_expect(X, 0)
 370 #else
 371 # define LIKELY(X)      (X)
 372 # define UNLIKELY(X)    (X)
 373 #endif
 374
 375 #undef HAVE_NATCH_CHAR
 376 #undef NATCH_CHAR
 377 #if defined HAVE_SETLOCALE && defined HAVE_C90AMEND1 && defined HAVE_WCWIDTH
 378 # define HAVE_NATCH_CHAR
 379 # define NATCH_CHAR(X)  X
 380 #else
 381 # define NATCH_CHAR(X)
 382 #endif
 383
 384 /* Compile-Time-Assert */
 385 #define CTA(TEST)       _CTA_1(TEST, __LINE__)
 386 #define _CTA_1(TEST,L)  _CTA_2(TEST, L)
 387 #define _CTA_2(TEST,L)  \
 388    typedef char COMPILE_TIME_ASSERT_failed_at_line_ ## L[(TEST) ? 1 : -1]
 389
 390 #undef ISPOW2
 391 #define ISPOW2(X)       ((((X) - 1) & (X)) == 0)
 392 #undef MIN
 393 #define MIN(A, B)       ((A) < (B) ? (A) : (B))
 394 #undef MAX
 395 #define MAX(A, B)       ((A) < (B) ? (B) : (A))
 396 #undef ABS
 397 #define ABS(A)          ((A) < 0 ? -(A) : (A))
 398
 399 #undef DBG
 400 #undef NDBG
 401 #ifndef HAVE_DEBUG
 402 # undef assert
 403 # define assert(X)      UNUSED(0)
 404 # define DBG(X)
 405 # define NDBG(X)        X
 406 #else
 407 # define DBG(X)         X
 408 # define NDBG(X)
 409 #endif
 410
 411 /* Translation (init in main.c) */
 412 #undef _
 413 #undef N_
 414 #undef V_
 415 #define _(S)            (S)
 416 #define N_(S)           (S)
 417 #define V_(S)           (S)
 418
 419 /*
 420  * Types
 421  */
 422
 423 #ifdef UINT8_MAX
 424 # define UI8_MAX        UINT8_MAX
 425 # define SI8_MIN        INT8_MIN
 426 # define SI8_MAX        INT8_MAX
 427 typedef uint8_t         ui8_t;
 428 typedef int8_t          si8_t;
 429 #elif UCHAR_MAX != 255
 430 # error UCHAR_MAX must be 255
 431 #else
 432 # define UI8_MAX        UCHAR_MAX
 433 # define SI8_MIN        CHAR_MIN
 434 # define SI8_MAX        CHAR_MAX
 435 typedef unsigned char   ui8_t;
 436 typedef signed char     si8_t;
 437 #endif
 438
 439 #if !defined PRIu8 || !defined PRId8
 440 # undef PRIu8
 441 # undef PRId8
 442 # define PRIu8          "hhu"
 443 # define PRId8          "hhd"
 444 #endif
 445
 446 #ifdef UINT16_MAX
 447 # define UI16_MAX       UINT16_MAX
 448 # define SI16_MIN       INT16_MIN
 449 # define SI16_MAX       INT16_MAX
 450 typedef uint16_t        ui16_t;
 451 typedef int16_t         si16_t;
 452 #elif USHRT_MAX != 0xFFFFu
 453 # error USHRT_MAX must be 0xFFFF
 454 #else
 455 # define UI16_MAX       USHRT_MAX
 456 # define SI16_MIN       SHRT_MIN
 457 # define SI16_MAX       SHRT_MAX
 458 typedef unsigned short  ui16_t;
 459 typedef signed short    si16_t;
 460 #endif
 461
 462 #if !defined PRIu16 || !defined PRId16
 463 # undef PRIu16
 464 # undef PRId16
 465 # if UI16_MAX == UINT_MAX
 466 #  define PRIu16        "u"
 467 #  define PRId16        "d"
 468 # else
 469 #  define PRIu16        "hu"
 470 #  define PRId16        "hd"
 471 # endif
 472 #endif
 473
 474 #ifdef UINT32_MAX
 475 # define UI32_MAX       UINT32_MAX
 476 # define SI32_MIN       INT32_MIN
 477 # define SI32_MAX       INT32_MAX
 478 typedef uint32_t        ui32_t;
 479 typedef int32_t         si32_t;
 480 #elif ULONG_MAX == 0xFFFFFFFFu
 481 # define UI32_MAX       ULONG_MAX
 482 # define SI32_MIN       LONG_MIN
 483 # define SI32_MAX       LONG_MAX
 484 typedef unsigned long int  ui32_t;
 485 typedef signed long int    si32_t;
 486 #elif UINT_MAX != 0xFFFFFFFFu
 487 # error UINT_MAX must be 0xFFFFFFFF
 488 #else
 489 # define UI32_MAX       UINT_MAX
 490 # define SI32_MIN       INT_MIN
 491 # define SI32_MAX       INT_MAX
 492 typedef unsigned int    ui32_t;
 493 typedef signed int      si32_t;
 494 #endif
 495
 496 #if !defined PRIu32 || !defined PRId32
 497 # undef PRIu32
 498 # undef PRId32
 499 # if UI32_MAX == ULONG_MAX
 500 #  define PRIu32        "lu"
 501 #  define PRId32        "ld"
 502 # else
 503 #  define PRIu32        "u"
 504 #  define PRId32        "d"
 505 # endif
 506 #endif
 507
 508 #ifdef UINT64_MAX
 509 # define UI64_MAX       UINT64_MAX
 510 # define SI64_MIN       INT64_MIN
 511 # define SI64_MAX       INT64_MAX
 512 typedef uint64_t        ui64_t;
 513 typedef int64_t         si64_t;
 514 #elif ULONG_MAX <= 0xFFFFFFFFu
 515 # if !defined ULLONG_MAX || (ULLONG_MAX >> 31) < 0xFFFFFFFFu
 516 #  error We need a 64 bit integer
 517 # else
 518 #  define UI64_MAX      ULLONG_MAX
 519 #  define SI64_MIN      LLONG_MIN
 520 #  define SI64_MAX      LLONG_MAX
 521 __EXTEN typedef unsigned long long  ui64_t;
 522 __EXTEN typedef signed long long    si64_t;
 523 # endif
 524 #else
 525 # define UI64_MAX       ULONG_MAX
 526 # define SI64_MIN       LONG_MIN
 527 # define SI64_MAX       LONG_MAX
 528 typedef unsigned long   ui64_t;
 529 typedef signed long     si64_t;
 530 #endif
 531
 532 #if !defined PRIu64 || !defined PRId64 || !defined PRIX64
 533 # undef PRIu64
 534 # undef PRId64
 535 # undef PRIX64
 536 # if defined ULLONG_MAX && UI64_MAX == ULLONG_MAX
 537 #  define PRIu64        "llu"
 538 #  define PRId64        "lld"
 539 #  define PRIX64        "llX"
 540 # else
 541 #  define PRIu64        "lu"
 542 #  define PRId64        "ld"
 543 #  define PRIX64        "lX"
 544 # endif
 545 #endif
 546
 547 /* (So that we can use UICMP() for size_t comparison, too) */
 548 typedef size_t          uiz_t;
 549 typedef ssize_t         siz_t;
 550
 551 #undef PRIuZ
 552 #undef PRIdZ
 553 #if defined __STDC_VERSION__ && __STDC_VERSION__ + 0 >= 199901L
 554 # define PRIuZ          "zu"
 555 # define PRIdZ          "zd"
 556 # define PRIxZ_FMT_CTA() CTA(1 == 1)
 557 #elif defined SIZE_MAX
 558 # if SIZE_MAX == UI64_MAX
 559 #  define PRIuZ         PRIu64
 560 #  define PRIdZ         PRId64
 561 #  define PRIxZ_FMT_CTA() CTA(sizeof(size_t) == sizeof(ui64_t))
 562 # elif SIZE_MAX == UI32_MAX
 563 #  define PRIuZ         PRIu32
 564 #  define PRIdZ         PRId32
 565 #  define PRIxZ_FMT_CTA() CTA(sizeof(size_t) == sizeof(ui32_t))
 566 # endif
 567 #endif
 568 #ifndef PRIuZ
 569 # define PRIuZ          "lu"
 570 # define PRIdZ          "ld"
 571 # define PRIxZ_FMT_CTA() CTA(sizeof(size_t) == sizeof(unsigned long))
 572 #endif
 573
 574 #ifndef UINTPTR_MAX
 575 # ifdef SIZE_MAX
 576 #  define uintptr_t     size_t
 577 #  define UINTPTR_MAX   SIZE_MAX
 578 # else
 579 #  define uintptr_t     unsigned long
 580 #  define UINTPTR_MAX   ULONG_MAX
 581 # endif
 582 #endif
 583
 584 #if !defined PRIuPTR || !defined PRIXPTR
 585 # undef PRIuPTR
 586 # undef PRIXPTR
 587 # if UINTPTR_MAX == ULONG_MAX
 588 #  define PRIuPTR       "lu"
 589 #  define PRIXPTR       "lX"
 590 # else
 591 #  define PRIuPTR       "u"
 592 #  define PRIXPTR       "X"
 593 # endif
 594 #endif
 595
 596 enum {FAL0, TRU1};
 597 typedef si8_t           bool_t;
 598
 599 /* Add shorter aliases for "normal" integers */
 600 typedef unsigned long   ul_i;
 601 typedef unsigned int    ui_i;
 602 typedef unsigned short  us_i;
 603 typedef unsigned char   uc_i;
 604
 605 typedef signed long     sl_i;
 606 typedef signed int      si_i;
 607 typedef signed short    ss_i;
 608 typedef signed char     sc_i;
 609
 610 typedef void (          *sighandler_type)(int);
 611
 612 enum user_options {
 613    OPT_NONE,
 614    OPT_DEBUG      = 1u<< 0,   /* -d / *debug* */
 615    OPT_VERB       = 1u<< 1,   /* -v / *verbose* */
 616    OPT_VERBVERB   = 1u<<19,   /* .. even more verbosity */
 617    OPT_EXISTONLY  = 1u<< 2,   /* -e */
 618    OPT_HEADERSONLY = 1u<< 3,  /* -H */
 619    OPT_HEADERLIST = 1u<< 4,   /* -L */
 620    OPT_NOSRC      = 1u<< 5,   /* -n */
 621    OPT_E_FLAG     = 1u<< 6,   /* -E / *skipemptybody* */
 622    OPT_F_FLAG     = 1u<< 7,   /* -F */
 623    OPT_N_FLAG     = 1u<< 8,   /* -N / *header* */
 624    OPT_R_FLAG     = 1u<< 9,   /* -R */
 625    OPT_r_FLAG     = 1u<<10,   /* -r (plus option_r_arg) */
 626    OPT_t_FLAG     = 1u<<11,   /* -t */
 627    OPT_u_FLAG     = 1u<<12,   /* -u / $USER and pw->pw_uid != getuid(2) */
 628    OPT_TILDE_FLAG = 1u<<13,   /* -~ */
 629    OPT_BATCH_FLAG = 1u<<14,   /* -# */
 630
 631    OPT_SENDMODE   = 1u<<15,   /* Usage case forces send mode */
 632    OPT_INTERACTIVE = 1u<<16,  /* isatty(0) */
 633    OPT_TTYIN      = OPT_INTERACTIVE,
 634    OPT_TTYOUT     = 1u<<17,
 635    OPT_UNICODE    = 1u<<18,   /* We're in an UTF-8 environment */
 636
 637    /* Some easy-access shortcuts */
 638    OPT_D_V        = OPT_DEBUG | OPT_VERB,
 639    OPT_D_VV       = OPT_DEBUG | OPT_VERBVERB
 640 };
 641 #define IS_TTY_SESSION() \
 642    ((options & (OPT_TTYIN | OPT_TTYOUT)) == (OPT_TTYIN | OPT_TTYOUT))
 643
 644 enum exit_status {
 645    EXIT_OK        = EXIT_SUCCESS,
 646    EXIT_ERR       = EXIT_FAILURE,
 647    EXIT_USE       = 2,
 648    EXIT_COLL_ABORT = 1<<1,    /* Message collection was aborted */
 649    EXIT_SEND_ERROR = 1<<2     /* Unspecified send error occurred */
 650 };
 651
 652 enum fedit_mode {
 653    FEDIT_NONE     = 0,
 654    FEDIT_SYSBOX   = 1<<0,     /* %: prefix */
 655    FEDIT_RDONLY   = 1<<1,     /* Readonly (per-box, OPT_R_FLAG is global) */
 656    FEDIT_NEWMAIL  = 1<<2      /* `newmail' operation TODO OBSOLETE THIS! */
 657 };
 658
 659 enum fexp_mode {
 660    FEXP_FULL,                 /* Full expansion */
 661    FEXP_LOCAL     = 1<<0,     /* Result must be local file/maildir */
 662    FEXP_SHELL     = 1<<1,     /* No folder %,#,&,+ stuff, yet sh(1) */
 663    FEXP_NSHORTCUT = 1<<2,     /* Don't expand shortcuts */
 664    FEXP_SILENT    = 1<<3,     /* Don't print but only return errors */
 665    FEXP_MULTIOK   = 1<<4      /* Expansion to many entries is ok */
 666 };
 667
 668 enum flock_type {
 669    FLOCK_READ,
 670    FLOCK_WRITE,
 671    FLOCK_UNLOCK
 672 };
 673
 674 /* <0 means "stop" unless *prompt* extensions are enabled. */
 675 enum prompt_exp {
 676    PROMPT_STOP    = -1,       /* \c */
 677    /* *prompt* extensions: \$, \@ etc. */
 678    PROMPT_DOLLAR  = -2,
 679    PROMPT_AT      = -3
 680 };
 681
 682 enum colourspec {
 683    COLOURSPEC_MSGINFO,
 684    COLOURSPEC_PARTINFO,
 685    COLOURSPEC_FROM_,
 686    COLOURSPEC_HEADER,
 687    COLOURSPEC_UHEADER,
 688    COLOURSPEC_RESET
 689 };
 690
 691 enum okay {
 692    STOP = 0,
 693    OKAY = 1
 694 };
 695
 696 enum mimeenc {
 697    MIME_NONE,        /* message is not in MIME format */
 698    MIME_BIN,         /* message is in binary encoding */
 699    MIME_8B,          /* message is in 8bit encoding */
 700    MIME_7B,          /* message is in 7bit encoding */
 701    MIME_QP,          /* message is quoted-printable */
 702    MIME_B64          /* message is in base64 encoding */
 703 };
 704
 705 enum mime_counter_evidence {
 706    MIMECE_NONE,
 707    MIMECE_USR_OVWR   = 1<<1
 708 };
 709
 710 enum conversion {
 711    CONV_NONE,        /* no conversion */
 712    CONV_7BIT,        /* no conversion, is 7bit */
 713    CONV_FROMQP,      /* convert from quoted-printable */
 714    CONV_TOQP,        /* convert to quoted-printable */
 715    CONV_8BIT,        /* convert to 8bit (iconv) */
 716    CONV_FROMB64,     /* convert from base64 */
 717    CONV_FROMB64_T,   /* convert from base64/text */
 718    CONV_TOB64,       /* convert to base64 */
 719    CONV_FROMHDR,     /* convert from RFC1522 format */
 720    CONV_TOHDR,       /* convert to RFC1522 format */
 721    CONV_TOHDR_A      /* convert addresses for header */
 722 };
 723
 724 enum sendaction {
 725    SEND_MBOX,        /* no conversion to perform */
 726    SEND_RFC822,      /* no conversion, no From_ line */
 727    SEND_TODISP,      /* convert to displayable form */
 728    SEND_TODISP_ALL,  /* same, include all MIME parts */
 729    SEND_SHOW,        /* convert to 'show' command form */
 730    SEND_TOSRCH,      /* convert for IMAP SEARCH */
 731    SEND_TOFILE,      /* convert for saving body to a file */
 732    SEND_TOPIPE,      /* convert for pipe-content/subc. */
 733    SEND_QUOTE,       /* convert for quoting */
 734    SEND_QUOTE_ALL,   /* same, include all MIME parts */
 735    SEND_DECRYPT      /* decrypt */
 736 };
 737
 738 enum mimecontent {
 739    MIME_UNKNOWN,     /* unknown content */
 740    MIME_SUBHDR,      /* inside a multipart subheader */
 741    MIME_822,         /* message/rfc822 content */
 742    MIME_MESSAGE,     /* other message/ content */
 743    MIME_TEXT_PLAIN,  /* text/plain content */
 744    MIME_TEXT_HTML,   /* text/html content */
 745    MIME_TEXT,        /* other text/ content */
 746    MIME_ALTERNATIVE, /* multipart/alternative content */
 747    MIME_DIGEST,      /* multipart/digest content */
 748    MIME_MULTI,       /* other multipart/ content */
 749    MIME_PKCS7,       /* PKCS7 content */
 750    MIME_DISCARD      /* content is discarded */
 751 };
 752
 753 /* Content-Transfer-Encodings as defined in RFC 2045:
 754  * - Quoted-Printable, section 6.7
 755  * - Base64, section 6.8 */
 756 #define QP_LINESIZE     (4 * 19)       /* Max. compliant QP linesize */
 757
 758 #define B64_LINESIZE    (4 * 19)       /* Max. compliant Base64 linesize */
 759 #define B64_ENCODE_INPUT_PER_LINE 57   /* Max. input for Base64 encode/line */
 760
 761 /* xxx QP came later, maybe rewrite all to use mimecte_flags directly? */
 762 enum __mimecte_flags {
 763    MIMECTE_NONE,
 764    MIMECTE_SALLOC = 1<<0,     /* Use salloc(), not srealloc().. */
 765    /* ..result .s,.l point to user buffer of *_LINESIZE+[+[+]] bytes instead */
 766    MIMECTE_BUF    = 1<<1,
 767    MIMECTE_CRLF   = 1<<2,     /* (encode) Append "\r\n" to lines */
 768    MIMECTE_LF     = 1<<3,     /* (encode) Append "\n" to lines */
 769    /* (encode) If one of _CRLF/_LF is set, honour *_LINESIZE+[+[+]] and
 770     * inject the desired line-ending whenever a linewrap is desired */
 771    MIMECTE_MULTILINE = 1<<4,
 772    /* (encode) Quote with header rules, do not generate soft NL breaks? */
 773    MIMECTE_ISHEAD = 1<<5
 774 };
 775
 776 enum qpflags {
 777    QP_NONE        = MIMECTE_NONE,
 778    QP_SALLOC      = MIMECTE_SALLOC,
 779    QP_BUF         = MIMECTE_BUF,
 780    QP_ISHEAD      = MIMECTE_ISHEAD
 781 };
 782
 783 enum b64flags {
 784    B64_NONE       = MIMECTE_NONE,
 785    B64_SALLOC     = MIMECTE_SALLOC,
 786    B64_BUF        = MIMECTE_BUF,
 787    B64_CRLF       = MIMECTE_CRLF,
 788    B64_LF         = MIMECTE_LF,
 789    B64_MULTILINE  = MIMECTE_MULTILINE
 790 };
 791
 792 enum oflags {
 793    OF_RDONLY      = 1<<0,
 794    OF_WRONLY      = 1<<1,
 795    OF_RDWR        = 1<<2,
 796    OF_APPEND      = 1<<3,
 797    OF_CREATE      = 1<<4,
 798    OF_TRUNC       = 1<<5,
 799    OF_EXCL        = 1<<6,
 800    OF_CLOEXEC     = 1<<7,
 801    OF_UNLINK      = 1<<8,     /* Only for Ftmp(): unlink(2) after creation */
 802    OF_HOLDSIGS    = 1<<9,     /* Mutual with OF_UNLINK - await Ftmp_free() */
 803    OF_REGISTER    = 1<<10     /* Register file in our file table */
 804 };
 805
 806 enum tdflags {
 807    TD_NONE,                   /* no display conversion */
 808    TD_ISPR        = 1<<0,     /* use isprint() checks */
 809    TD_ICONV       = 1<<1,     /* use iconv() */
 810    TD_DELCTRL     = 1<<2,     /* delete control characters */
 811
 812    /*
 813     * NOTE: _TD_EOF and _TD_BUFCOPY may be ORd with enum conversion and
 814     * enum sendaction, and may thus NOT clash with their bit range!
 815     */
 816    _TD_EOF        = 1<<14,    /* EOF seen, last round! */
 817    _TD_BUFCOPY    = 1<<15     /* Buffer may be constant, copy it */
 818 };
 819
 820 enum protocol {
 821    PROTO_FILE,       /* refers to a local file */
 822    PROTO_POP3,       /* is a pop3 server string */
 823    PROTO_IMAP,       /* is an imap server string */
 824    PROTO_MAILDIR,    /* refers to a maildir folder */
 825    PROTO_UNKNOWN     /* unknown protocol */
 826 };
 827
 828 enum cproto {
 829    CPROTO_SMTP,
 830    CPROTO_POP3,
 831    CPROTO_IMAP
 832 };
 833
 834 enum authtype {
 835    AUTHTYPE_NONE     = 1<<0,
 836    AUTHTYPE_PLAIN    = 1<<1,  /* POP3: APOP is covered by this */
 837    AUTHTYPE_LOGIN    = 1<<2,
 838    AUTHTYPE_CRAM_MD5 = 1<<3,
 839    AUTHTYPE_GSSAPI   = 1<<4
 840 };
 841
 842 #ifdef HAVE_SSL
 843 enum ssl_verify_level {
 844    SSL_VERIFY_IGNORE,
 845    SSL_VERIFY_WARN,
 846    SSL_VERIFY_ASK,
 847    SSL_VERIFY_STRICT
 848 };
 849 #endif
 850
 851 /* A large enum with all the binary and value options a.k.a their keys.
 852  * Only the constant keys are in here, to be looked up via ok_[bv]look(),
 853  * ok_[bv]set() and ok_[bv]clear().
 854  * Note: see the comments in accmacvar.c before changing *anything* in here! */
 855 enum okeys {
 856    /* Option keys for binary options */
 857    ok_b_add_file_recipients,
 858    ok_b_allnet,
 859    ok_b_append,
 860    ok_b_ask,
 861    ok_b_askatend,
 862    ok_b_askattach,
 863    ok_b_askbcc,
 864    ok_b_askcc,
 865    ok_b_asksign,
 866    ok_b_asksub,
 867    ok_b_attachment_ask_content_description,
 868    ok_b_attachment_ask_content_disposition,
 869    ok_b_attachment_ask_content_id,
 870    ok_b_attachment_ask_content_type,
 871    ok_b_autocollapse,
 872    ok_b_autoprint,
 873    ok_b_autothread,
 874    ok_b_bang,
 875    ok_b_batch_exit_on_error,
 876    ok_b_bsdannounce,
 877    ok_b_bsdcompat,
 878    ok_b_bsdflags,
 879    ok_b_bsdheadline,
 880    ok_b_bsdmsgs,
 881    ok_b_bsdorder,
 882    ok_b_bsdset,
 883    ok_b_colour_disable,
 884    ok_b_colour_pager,
 885    ok_b_debug,                         /* {special=1} */
 886    ok_b_disconnected,
 887    ok_b_disposition_notification_send,
 888    ok_b_dot,
 889    ok_b_editalong,
 890    ok_b_editheaders,
 891    ok_b_emptybox,
 892    ok_b_emptystart,
 893    ok_b_flipr,
 894    ok_b_forward_as_attachment,
 895    ok_b_fullnames,
 896    ok_b_header,                        /* {special=1} */
 897    ok_b_history_gabby,
 898    ok_b_history_gabby_persist,
 899    ok_b_hold,
 900    ok_b_idna_disable,
 901    ok_b_ignore,
 902    ok_b_ignoreeof,
 903    ok_b_imap_use_starttls,
 904    ok_b_keep,
 905    ok_b_keep_content_length,
 906    ok_b_keepsave,
 907    ok_b_line_editor_disable,
 908    ok_b_markanswered,
 909    ok_b_message_id_disable,
 910    ok_b_metoo,
 911    ok_b_mime_allow_text_controls,
 912    ok_b_netrc_lookup,
 913    ok_b_outfolder,
 914    ok_b_page,
 915    ok_b_piperaw,
 916    ok_b_pop3_bulk_load,
 917    ok_b_pop3_no_apop,
 918    ok_b_pop3_use_starttls,
 919    ok_b_print_all_chars,
 920    ok_b_print_alternatives,
 921    ok_b_quiet,
 922    ok_b_quote_as_attachment,
 923    ok_b_recipients_in_cc,
 924    ok_b_record_resent,
 925    ok_b_reply_in_same_charset,
 926    ok_b_Replyall,
 927    ok_b_rfc822_body_from_,             /* {name=rfc822-body-from_} */
 928    ok_b_save,
 929    ok_b_searchheaders,
 930    ok_b_sendcharsets_else_ttycharset,
 931    ok_b_sendwait,
 932    ok_b_showlast,
 933    ok_b_showname,
 934    ok_b_showto,
 935    ok_b_skipemptybody,                 /* {special=1} */
 936    ok_b_smime_force_encryption,
 937    ok_b_smime_no_default_ca,
 938    ok_b_smime_sign,
 939    ok_b_smtp_use_starttls,
 940    ok_b_ssl_no_default_ca,
 941    ok_b_ssl_v2_allow,
 942    ok_b_v15_compat,
 943    ok_b_verbose,                       /* {special=1} */
 944    ok_b_writebackedited,
 945
 946    /* Option keys for values options */
 947    ok_v_agent_shell_lookup,
 948    ok_v_attrlist,
 949    ok_v_autobcc,
 950    ok_v_autocc,
 951    ok_v_autosort,
 952    ok_v_charset_7bit,
 953    ok_v_charset_8bit,
 954    ok_v_cmd,
 955    ok_v_colour_from_,                  /* {name=colour-from_} */
 956    ok_v_colour_header,
 957    ok_v_colour_msginfo,
 958    ok_v_colour_partinfo,
 959    ok_v_colour_terms,
 960    ok_v_colour_uheader,
 961    ok_v_colour_user_headers,
 962    ok_v_crt,
 963    ok_v_datefield,
 964    ok_v_datefield_markout_older,
 965    ok_v_DEAD,
 966    ok_v_EDITOR,
 967    ok_v_encoding,
 968    ok_v_escape,
 969    ok_v_folder,                        /* {special=1} */
 970    ok_v_folder_hook,
 971    ok_v_from,
 972    ok_v_fwdheading,
 973    ok_v_headline,
 974    ok_v_headline_bidi,
 975    ok_v_hostname,
 976    ok_v_imap_auth,
 977    ok_v_imap_cache,
 978    ok_v_imap_keepalive,
 979    ok_v_imap_list_depth,
 980    ok_v_indentprefix,
 981    ok_v_line_editor_cursor_right,      /* {special=1} */
 982    ok_v_LISTER,
 983    ok_v_MAIL,
 984    ok_v_MBOX,
 985    ok_v_mime_counter_evidence,
 986    /* TODO v15-compat: mimetypes-load-control -> mimetypes-load / mimetypes */
 987    ok_v_mimetypes_load_control,
 988    ok_v_NAIL_EXTRA_RC,                 /* {name=NAIL_EXTRA_RC} */
 989    /* TODO v15-compat: NAIL_HEAD -> message-head? */
 990    ok_v_NAIL_HEAD,                     /* {name=NAIL_HEAD} */
 991    /* TODO v15-compat: NAIL_HISTFILE -> history-file */
 992    ok_v_NAIL_HISTFILE,                 /* {name=NAIL_HISTFILE} */
 993    /* TODO v15-compat: NAIL_HISTSIZE -> history-size{,limit} */
 994    ok_v_NAIL_HISTSIZE,                 /* {name=NAIL_HISTSIZE} */
 995    /* TODO v15-compat: NAIL_TAIL -> message-tail? */
 996    ok_v_NAIL_TAIL,                     /* {name=NAIL_TAIL} */
 997    ok_v_newfolders,
 998    ok_v_newmail,
 999    ok_v_ORGANIZATION,
1000    ok_v_PAGER,
1001    ok_v_password,
1002    /* TODO pop3_auth is yet a dummy to enable easier impl. of ccred_lookup()! */
1003    ok_v_pop3_auth,
1004    ok_v_pop3_keepalive,
1005    ok_v_prompt,
1006    ok_v_quote,
1007    ok_v_quote_fold,
1008    ok_v_record,
1009    ok_v_reply_strings,
1010    ok_v_replyto,
1011    ok_v_screen,
1012    ok_v_sendcharsets,
1013    ok_v_sender,
1014    ok_v_sendmail,
1015    ok_v_sendmail_arguments,
1016    ok_v_sendmail_progname,
1017    ok_v_SHELL,
1018    ok_v_Sign,
1019    ok_v_sign,
1020    ok_v_signature,
1021    ok_v_smime_ca_dir,
1022    ok_v_smime_ca_file,
1023    ok_v_smime_crl_dir,
1024    ok_v_smime_crl_file,
1025    ok_v_smime_sign_cert,
1026    ok_v_smime_sign_include_certs,
1027    ok_v_smtp,
1028    /* TODO v15-compat: smtp-auth: drop */
1029    ok_v_smtp_auth,
1030    ok_v_smtp_auth_password,
1031    ok_v_smtp_auth_user,
1032    ok_v_smtp_hostname,
1033    ok_v_spam_command,
1034    ok_v_spam_host,
1035    ok_v_spam_maxsize,
1036    ok_v_spam_port,
1037    ok_v_spam_socket,
1038    ok_v_spam_user,
1039    ok_v_ssl_ca_dir,
1040    ok_v_ssl_ca_file,
1041    ok_v_ssl_cert,
1042    ok_v_ssl_cipher_list,
1043    ok_v_ssl_crl_dir,
1044    ok_v_ssl_crl_file,
1045    ok_v_ssl_key,
1046    ok_v_ssl_method,
1047    ok_v_ssl_rand_egd,
1048    ok_v_ssl_rand_file,
1049    ok_v_ssl_verify,
1050    ok_v_stealthmua,
1051    ok_v_toplines,
1052    ok_v_ttycharset,
1053    ok_v_user,
1054    ok_v_VISUAL
1055 };
1056
1057 enum okey_xlook_mode {
1058    OXM_PLAIN      = 1<<0,  /* Plain key always tested */
1059    OXM_H_P        = 1<<1,  /* Check PLAIN-.url_h_p */
1060    OXM_U_H_P      = 1<<2,  /* Check PLAIN-.url_u_h_p */
1061    OXM_ALL        = 0x7
1062 };
1063
1064 /* Locale-independent character classes */
1065 enum {
1066    C_CNTRL        = 0000,
1067    C_BLANK        = 0001,
1068    C_WHITE        = 0002,
1069    C_SPACE        = 0004,
1070    C_PUNCT        = 0010,
1071    C_OCTAL        = 0020,
1072    C_DIGIT        = 0040,
1073    C_UPPER        = 0100,
1074    C_LOWER        = 0200
1075 };
1076
1077 struct str {
1078    char     *s;      /* the string's content */
1079    size_t   l;       /* the stings's length */
1080 };
1081
1082 struct colour_table {
1083    /* Plus a copy of *colour-user-headers* */
1084    struct str  ct_csinfo[COLOURSPEC_RESET+1 + 1];
1085 };
1086
1087 struct bidi_info {
1088    struct str  bi_start;      /* Start of (possibly) bidirectional text */
1089    struct str  bi_end;        /* End of ... */
1090    size_t      bi_pad;        /* No of visual columns to reserve for BIDI pad */
1091 };
1092
1093 struct url {
1094    char const     *url_input;       /* Input as given (really) */
1095    enum cproto    url_cproto;       /* Communication protocol as given */
1096    bool_t         url_needs_tls;    /* Wether the protocol uses SSL/TLS */
1097    bool_t         url_had_user;     /* Wether .url_user was part of the URL */
1098    ui16_t         url_portno;       /* atoi .url_port or default, host endian */
1099    char const     *url_port;        /* Port (if given) or NULL */
1100    char           url_proto[14];    /* Communication protocol as 'xy\0//' */
1101    ui8_t          url_proto_len;    /* Length of .url_proto ('\0' index) */
1102    ui8_t          url_proto_xlen;   /* .. if '\0' is replaced with ':' */
1103    struct str     url_user;         /* User, exactly as given / looked up */
1104    struct str     url_user_enc;     /* User, urlxenc()oded */
1105    struct str     url_pass;         /* Pass (urlxdec()oded) or NULL */
1106    struct str     url_host;         /* Service hostname */
1107    struct str     url_path;         /* CPROTO_IMAP: path suffix or NULL */
1108    /* TODO: url_get_component(url *, enum COMPONENT, str *store) */
1109    struct str     url_h_p;          /* .url_host[:.url_port] */
1110    /* .url_user@.url_host
1111     * Note: for CPROTO_SMTP this may resolve HOST via *smtp-hostname* (->
1112     * *hostname*)!  (And may later be overwritten according to *from*!) */
1113    struct str     url_u_h;
1114    struct str     url_u_h_p;        /* .url_user@.url_host[:.url_port] */
1115    struct str     url_eu_h_p;       /* .url_user_enc@.url_host[:.url_port] */
1116    char const     *url_p_u_h_p;     /* .url_proto://.url_u_h_p */
1117    char const     *url_p_eu_h_p;    /* .url_proto://.url_eu_h_p */
1118    char const     *url_p_eu_h_p_p;  /* .url_proto://.url_eu_h_p[/.url_path] */
1119 };
1120
1121 struct ccred {
1122    enum cproto    cc_cproto;     /* Communication protocol */
1123    enum authtype  cc_authtype;   /* Desired authentication */
1124    char const     *cc_auth;      /* Authentication type as string */
1125    struct str     cc_user;       /* User (urlxdec()oded) or NULL */
1126    struct str     cc_pass;       /* Password (urlxdec()oded) or NULL */
1127 };
1128
1129 struct time_current {
1130    time_t      tc_time;
1131    struct tm   tc_gm;
1132    struct tm   tc_local;
1133    char        tc_ctime[32];
1134 };
1135
1136 struct quoteflt {
1137    FILE        *qf_os;        /* Output stream */
1138    char const  *qf_pfix;
1139    ui32_t      qf_pfix_len;   /* Length of prefix: 0: bypass */
1140    ui32_t      qf_qfold_min;  /* Simple way: wrote prefix? */
1141 #ifdef HAVE_QUOTE_FOLD
1142    ui32_t      qf_qfold_max;  /* Otherwise: line lengths */
1143    ui8_t       qf_state;      /* *quote-fold* state machine */
1144    bool_t      qf_brk_isws;   /* Breakpoint is at WS */
1145    ui8_t       __dummy[2];
1146    ui32_t      qf_wscnt;      /* Whitespace count */
1147    ui32_t      qf_brkl;       /* Breakpoint */
1148    ui32_t      qf_brkw;       /* Visual width, breakpoint */
1149    ui32_t      qf_datw;       /* Current visual output line width */
1150    struct str  qf_dat;        /* Current visual output line */
1151    struct str  qf_currq;      /* Current quote, compressed */
1152    mbstate_t   qf_mbps[2];
1153 #endif
1154 };
1155
1156 struct search_expr {
1157    char const  *ss_where;  /* to search for the expression (not always used) */
1158    char const  *ss_sexpr;  /* String search expression; NULL: use .ss_reexpr */
1159 #ifdef HAVE_REGEX
1160    regex_t     ss_reexpr;
1161 #endif
1162 };
1163
1164 struct eval_ctx {
1165    struct str  ev_line;          /* The terminated data to evaluate */
1166    ui32_t      ev_line_size;     /* May be used to store line memory size */
1167    bool_t      ev_is_recursive;  /* Evaluation in evaluation? (collect ~:) */
1168    ui8_t       __dummy[3];
1169    bool_t      ev_add_history;   /* Enter (final) command in history? */
1170    char const  *ev_new_content;  /* History: reenter line, start with this */
1171 };
1172
1173 struct termios_state {
1174    struct termios ts_tios;
1175    char        *ts_linebuf;
1176    size_t      ts_linesize;
1177    bool_t      ts_needs_reset;
1178 };
1179
1180 #define termios_state_reset() \
1181 do {\
1182    if (termios_state.ts_needs_reset) {\
1183       tcsetattr(0, TCSADRAIN, &termios_state.ts_tios);\
1184       termios_state.ts_needs_reset = FAL0;\
1185    }\
1186 } while (0)
1187
1188 struct sock {                 /* data associated with a socket */
1189    int         s_fd;          /* file descriptor */
1190 #ifdef HAVE_SSL
1191    int         s_use_ssl;     /* SSL is used */
1192 # ifdef HAVE_OPENSSL
1193    void        *s_ssl;        /* SSL object */
1194    void        *s_ctx;        /* SSL context object */
1195 # endif
1196 #endif
1197    char        *s_wbuf;       /* for buffered writes */
1198    int         s_wbufsize;    /* allocated size of s_buf */
1199    int         s_wbufpos;     /* position of first empty data byte */
1200    char        *s_rbufptr;    /* read pointer to s_rbuf */
1201    int         s_rsz;         /* size of last read in s_rbuf */
1202    char const  *s_desc;       /* description of error messages */
1203    void        (*s_onclose)(void);     /* execute on close */
1204    char        s_rbuf[LINESIZE + 1];   /* for buffered reads */
1205 };
1206
1207 struct sockconn {
1208    struct url     sc_url;
1209    struct ccred   sc_cred;
1210    struct sock    sc_sock;
1211 };
1212
1213 struct mailbox {
1214    enum {
1215       MB_NONE     = 000,      /* no reply expected */
1216       MB_COMD     = 001,      /* command reply expected */
1217       MB_MULT     = 002,      /* multiline reply expected */
1218       MB_PREAUTH  = 004,      /* not in authenticated state */
1219       MB_BYE      = 010       /* may accept a BYE state */
1220    }           mb_active;
1221    FILE        *mb_itf;       /* temp file with messages, read open */
1222    FILE        *mb_otf;       /* same, write open */
1223    char        *mb_sorted;    /* sort method */
1224    enum {
1225       MB_VOID,       /* no type (e. g. connection failed) */
1226       MB_FILE,       /* local file */
1227       MB_POP3,       /* POP3 mailbox */
1228       MB_IMAP,       /* IMAP mailbox */
1229       MB_MAILDIR,    /* maildir folder */
1230       MB_CACHE       /* cached mailbox */
1231    }           mb_type;       /* type of mailbox */
1232    enum {
1233       MB_DELE = 01,  /* may delete messages in mailbox */
1234       MB_EDIT = 02   /* may edit messages in mailbox */
1235    }           mb_perm;
1236    int mb_compressed;         /* is a compressed mbox file */
1237    int mb_threaded;           /* mailbox has been threaded */
1238 #ifdef HAVE_IMAP
1239    enum mbflags {
1240       MB_NOFLAGS  = 000,
1241       MB_UIDPLUS  = 001 /* supports IMAP UIDPLUS */
1242    }           mb_flags;
1243    unsigned long  mb_uidvalidity;   /* IMAP unique identifier validity */
1244    char        *mb_imap_account;    /* name of current IMAP account */
1245    char        *mb_imap_pass;       /* xxx v15-compat URL workaround */
1246    char        *mb_imap_mailbox;    /* name of current IMAP mailbox */
1247    char        *mb_cache_directory; /* name of cache directory */
1248 #endif
1249    struct sock mb_sock;       /* socket structure */
1250 };
1251
1252 enum needspec {
1253    NEED_UNSPEC,      /* unspecified need, don't fetch */
1254    NEED_HEADER,      /* need the header of a message */
1255    NEED_BODY         /* need header and body of a message */
1256 };
1257
1258 enum havespec {
1259    HAVE_NOTHING,              /* nothing downloaded yet */
1260    HAVE_HEADER    = 01,       /* header is downloaded */
1261    HAVE_BODY      = 02        /* entire message is downloaded */
1262 };
1263
1264 /* flag bits. Attention: Flags that are used in cache.c may not change */
1265 enum mflag {
1266    MUSED          = (1<< 0),  /* entry is used, but this bit isn't */
1267    MDELETED       = (1<< 1),  /* entry has been deleted */
1268    MSAVED         = (1<< 2),  /* entry has been saved */
1269    MTOUCH         = (1<< 3),  /* entry has been noticed */
1270    MPRESERVE      = (1<< 4),  /* keep entry in sys mailbox */
1271    MMARK          = (1<< 5),  /* message is marked! */
1272    MODIFY         = (1<< 6),  /* message has been modified */
1273    MNEW           = (1<< 7),  /* message has never been seen */
1274    MREAD          = (1<< 8),  /* message has been read sometime. */
1275    MSTATUS        = (1<< 9),  /* message status has changed */
1276    MBOX           = (1<<10),  /* Send this to mbox, regardless */
1277    MNOFROM        = (1<<11),  /* no From line */
1278    MHIDDEN        = (1<<12),  /* message is hidden to user */
1279    MFULLYCACHED   = (1<<13),  /* message is completely cached */
1280    MBOXED         = (1<<14),  /* message has been sent to mbox */
1281    MUNLINKED      = (1<<15),  /* message was unlinked from cache */
1282    MNEWEST        = (1<<16),  /* message is very new (newmail) */
1283    MFLAG          = (1<<17),  /* message has been flagged recently */
1284    MUNFLAG        = (1<<18),  /* message has been unflagged */
1285    MFLAGGED       = (1<<19),  /* message is `flagged' */
1286    MANSWER        = (1<<20),  /* message has been answered recently */
1287    MUNANSWER      = (1<<21),  /* message has been unanswered */
1288    MANSWERED      = (1<<22),  /* message is `answered' */
1289    MDRAFT         = (1<<23),  /* message has been drafted recently */
1290    MUNDRAFT       = (1<<24),  /* message has been undrafted */
1291    MDRAFTED       = (1<<25),  /* message is marked as `draft' */
1292    MOLDMARK       = (1<<26),  /* messages was marked previously */
1293    MSPAM          = (1<<27)   /* message is classified as spam */
1294 };
1295 #define MMNORM          (MDELETED | MSAVED | MHIDDEN)
1296 #define MMNDEL          (MDELETED | MHIDDEN)
1297
1298 #define visible(mp)     (((mp)->m_flag & MMNDEL) == 0)
1299
1300 struct mimepart {
1301    enum mflag  m_flag;        /* flags */
1302    enum havespec m_have;      /* downloaded parts of the part */
1303 #ifdef HAVE_SPAM
1304    ui32_t      m_spamscore;   /* Spam score as int, 24:8 bits */
1305 #endif
1306    int         m_block;       /* block number of this part */
1307    size_t      m_offset;      /* offset in block of part */
1308    size_t      m_size;        /* Bytes in the part */
1309    size_t      m_xsize;       /* Bytes in the full part */
1310    long        m_lines;       /* Lines in the message */
1311    long        m_xlines;      /* Lines in the full message */
1312    time_t      m_time;        /* time the message was sent */
1313    char const  *m_from;       /* message sender */
1314    struct mimepart *m_nextpart;     /* next part at same level */
1315    struct mimepart *m_multipart;    /* parts of multipart */
1316    struct mimepart *m_parent;       /* enclosing multipart part */
1317    char        *m_ct_type;          /* content-type */
1318    char        *m_ct_type_plain;    /* content-type without specs */
1319    char        *m_ct_type_usr_ovwr; /* Forcefully overwritten one */
1320    enum mimecontent m_mimecontent;  /* same in enum */
1321    char const  *m_charset;    /* charset */
1322    char        *m_ct_transfer_enc;  /* content-transfer-encoding */
1323    enum mimeenc m_mimeenc;     /* same in enum */
1324    char        *m_partstring; /* part level string */
1325    char        *m_filename;   /* attachment filename */
1326 };
1327
1328 struct message {
1329    enum mflag  m_flag;        /* flags */
1330    enum havespec m_have;      /* downloaded parts of the message */
1331 #ifdef HAVE_SPAM
1332    ui32_t      m_spamscore;   /* Spam score as int, 24:8 bits */
1333 #endif
1334    int         m_block;       /* block number of this message */
1335    size_t      m_offset;      /* offset in block of message */
1336    size_t      m_size;        /* Bytes in the message */
1337    size_t      m_xsize;       /* Bytes in the full message */
1338    long        m_lines;       /* Lines in the message */
1339    long        m_xlines;      /* Lines in the full message */
1340    time_t      m_time;        /* time the message was sent */
1341    time_t      m_date;        /* time in the 'Date' field */
1342    unsigned    m_idhash;      /* hash on Message-ID for threads */
1343    struct message *m_child;   /* first child of this message */
1344    struct message *m_younger; /* younger brother of this message */
1345    struct message *m_elder;   /* elder brother of this message */
1346    struct message *m_parent;  /* parent of this message */
1347    unsigned    m_level;       /* thread level of message */
1348    long        m_threadpos;   /* position in threaded display */
1349 #ifdef HAVE_IMAP
1350    unsigned long m_uid;       /* IMAP unique identifier */
1351 #endif
1352    char        *m_maildir_file;  /* original maildir file of msg */
1353    ui32_t      m_maildir_hash;   /* hash of file name in maildir sub */
1354    int         m_collapsed;      /* collapsed thread information */
1355 };
1356
1357 /* Given a file address, determine the block number it represents */
1358 #define mailx_blockof(off)                ((int) ((off) / 4096))
1359 #define mailx_offsetof(off)               ((int) ((off) % 4096))
1360 #define mailx_positionof(block, offset)   ((off_t)(block) * 4096 + (offset))
1361
1362 /* Argument types */
1363 enum argtype {
1364    ARG_MSGLIST    = 0,        /* Message list type */
1365    ARG_STRLIST    = 1,        /* A pure string */
1366    ARG_RAWLIST    = 2,        /* Shell string list */
1367    ARG_NOLIST     = 3,        /* Just plain 0 */
1368    ARG_NDMLIST    = 4,        /* Message list, no defaults */
1369    ARG_ECHOLIST   = 5,        /* Like raw list, but keep quote chars */
1370    ARG_ARGMASK    = 7,        /* Mask of the above */
1371
1372    ARG_A          = 1u<< 4,   /* Needs an active mailbox */
1373    ARG_F          = 1u<< 5,   /* Is a conditional command */
1374    ARG_H          = 1u<< 6,   /* Never place in history */
1375    ARG_I          = 1u<< 7,   /* Interactive command bit */
1376    ARG_M          = 1u<< 8,   /* Legal from send mode bit */
1377    ARG_P          = 1u<< 9,   /* Autoprint dot after command */
1378    ARG_R          = 1u<<10,   /* Cannot be called from collect / recursion */
1379    ARG_T          = 1u<<11,   /* Is a transparent command */
1380    ARG_V          = 1u<<12,   /* Places data in temporary_arg_v_store */
1381    ARG_W          = 1u<<13    /* Invalid when read only bit */
1382 };
1383
1384 enum gfield {
1385    GTO            = 1,        /* Grab To: line */
1386    GSUBJECT       = 2,        /* Likewise, Subject: line */
1387    GCC            = 4,        /* And the Cc: line */
1388    GBCC           = 8,        /* And also the Bcc: line */
1389
1390    GNL            = 16,       /* Print blank line after */
1391    GDEL           = 32,       /* Entity removed from list */
1392    GCOMMA         = 64,       /* detract puts in commas */
1393    GUA            = 128,      /* User-Agent field */
1394    GMIME          = 256,      /* MIME 1.0 fields */
1395    GMSGID         = 512,      /* a Message-ID */
1396    /* 1024 */
1397    GIDENT         = 2048,     /* From:, Reply-To: and Organization: field */
1398    GREF           = 4096,     /* References: field */
1399    GDATE          = 8192,     /* Date: field */
1400    GFULL          = 16384,    /* include full names */
1401    GSKIN          = 32768,    /* skin names */
1402    GEXTRA         = 65536,    /* extra fields */
1403    GFILES         = 131072    /* include filename addresses */
1404 };
1405 #define GMASK           (GTO | GSUBJECT | GCC | GBCC)
1406
1407 /* Structure used to pass about the current state of a message (header) */
1408 struct header {
1409    struct name *h_to;         /* Dynamic "To:" string */
1410    char        *h_subject;    /* Subject string */
1411    struct name *h_cc;         /* Carbon copies string */
1412    struct name *h_bcc;        /* Blind carbon copies */
1413    struct name *h_ref;        /* References */
1414    struct attachment *h_attach; /* MIME attachments */
1415    char        *h_charset;    /* preferred charset */
1416    struct name *h_from;       /* overridden "From:" field */
1417    struct name *h_replyto;    /* overridden "Reply-To:" field */
1418    struct name *h_sender;     /* overridden "Sender:" field */
1419    char        *h_organization; /* overridden "Organization:" field */
1420 };
1421
1422 /* Handling of namelist nodes used in processing the recipients of mail and
1423  * aliases, inspection of mail-addresses and all that kind of stuff */
1424 enum nameflags {
1425    NAME_NAME_SALLOC        = 1<< 0, /* .n_name is doped */
1426    NAME_FULLNAME_SALLOC    = 1<< 1, /* .n_fullname is doped */
1427    NAME_SKINNED            = 1<< 2, /* Is actually skin()ned */
1428    NAME_IDNA               = 1<< 3, /* IDNA was applied */
1429    NAME_ADDRSPEC_CHECKED   = 1<< 4, /* Address has been .. and */
1430    NAME_ADDRSPEC_ISFILE    = 1<< 5, /* ..is a file path */
1431    NAME_ADDRSPEC_ISPIPE    = 1<< 6, /* ..is a command for piping */
1432    NAME_ADDRSPEC_ISFILEORPIPE = NAME_ADDRSPEC_ISFILE | NAME_ADDRSPEC_ISPIPE,
1433    NAME_ADDRSPEC_ERR_EMPTY = 1<< 7, /* An empty string (or NULL) */
1434    NAME_ADDRSPEC_ERR_ATSEQ = 1<< 8, /* Weird @ sequence */
1435    NAME_ADDRSPEC_ERR_CHAR  = 1<< 9, /* Invalid character */
1436    NAME_ADDRSPEC_ERR_IDNA  = 1<<10, /* IDNA convertion failed */
1437    NAME_ADDRSPEC_INVALID   = NAME_ADDRSPEC_ERR_EMPTY |
1438          NAME_ADDRSPEC_ERR_ATSEQ | NAME_ADDRSPEC_ERR_CHAR |
1439          NAME_ADDRSPEC_ERR_IDNA,
1440
1441    _NAME_SHIFTWC  = 11,
1442    _NAME_MAXWC    = 0xFFFFF,
1443    _NAME_MASKWC   = _NAME_MAXWC << _NAME_SHIFTWC
1444 };
1445
1446 /* In the !_ERR_EMPTY case, the failing character can be queried */
1447 #define NAME_ADDRSPEC_ERR_GETWC(F)  \
1448    ((((unsigned int)(F) & _NAME_MASKWC) >> _NAME_SHIFTWC) & _NAME_MAXWC)
1449 #define NAME_ADDRSPEC_ERR_SET(F, E, WC) \
1450 do {\
1451    (F) = ((F) & ~(NAME_ADDRSPEC_INVALID | _NAME_MASKWC)) |\
1452          (E) | (((unsigned int)(WC) & _NAME_MAXWC) << _NAME_SHIFTWC);\
1453 } while (0)
1454
1455 struct name {
1456    struct name *n_flink;      /* Forward link in list. */
1457    struct name *n_blink;      /* Backward list link */
1458    enum gfield n_type;        /* From which list it came */
1459    enum nameflags n_flags;    /* enum nameflags */
1460    char        *n_name;       /* This fella's name */
1461    char        *n_fullname;   /* Sometimes, name including comment */
1462 };
1463
1464 struct addrguts {
1465    char const  *ag_input;     /* Input string as given */
1466    size_t      ag_ilen;       /* strlen() of input */
1467    size_t      ag_iaddr_start; /* Start of *addr-spec* in .ag_input */
1468    size_t      ag_iaddr_aend; /* ..and one past its end */
1469    char        *ag_skinned;   /* Output (alloced if !=.ag_input) */
1470    size_t      ag_slen;       /* strlen() of .ag_skinned */
1471    size_t      ag_sdom_start; /* Start of domain in .ag_skinned, */
1472    enum nameflags ag_n_flags; /* enum nameflags of .ag_skinned */
1473 };
1474
1475 /* MIME attachments */
1476 enum attach_conv {
1477    AC_DEFAULT,       /* _get_lc() -> _iter_*() */
1478    AC_FIX_OUTCS,     /* _get_lc() -> "charset=" .a_charset */
1479    AC_FIX_INCS,      /* "charset=".a_input_charset (nocnv) */
1480    AC_TMPFILE        /* attachment.a_tmpf is converted */
1481 };
1482
1483 struct attachment {
1484    struct attachment *a_flink;   /* Forward link in list. */
1485    struct attachment *a_blink;   /* Backward list link */
1486    char const  *a_name;       /* file name */
1487    char const  *a_content_type;  /* content type */
1488    char const  *a_content_disposition; /* content disposition */
1489    char const  *a_content_id; /* content id */
1490    char const  *a_content_description; /* content description */
1491    char const  *a_input_charset; /* Interpretation depends on .a_conv */
1492    char const  *a_charset;    /* ... */
1493    FILE        *a_tmpf;       /* If AC_TMPFILE */
1494    enum attach_conv a_conv;   /* User chosen conversion */
1495    int         a_msgno;       /* message number */
1496 };
1497
1498 struct sendbundle {
1499    struct header  *sb_hp;
1500    struct name    *sb_to;
1501    FILE           *sb_input;
1502    struct str     sb_signer;  /* USER@HOST for signing+ */
1503    struct url     sb_url;
1504    struct ccred   sb_ccred;
1505 };
1506
1507 struct group {
1508    struct group *ge_link;     /* Next person in this group */
1509    char        *ge_name;      /* This person's user name */
1510 };
1511
1512 struct grouphead {
1513    struct grouphead *g_link;  /* Next grouphead in list */
1514    char        *g_name;       /* Name of this group */
1515    struct group *g_list;      /* Users in group. */
1516 };
1517
1518 /* Structure of the hash table of ignored header fields */
1519 struct ignoretab {
1520    int         i_count;       /* Number of entries */
1521    struct ignore {
1522       struct ignore  *i_link;    /* Next ignored field in bucket */
1523       char           *i_field;   /* This ignored field */
1524    }           *i_head[HSHSIZE];
1525 };
1526
1527 /* For the 'shortcut' and 'unshortcut' functionality */
1528 struct shortcut {
1529    struct shortcut *sh_next;  /* next shortcut in list */
1530    char        *sh_short;     /* shortcut string */
1531    char        *sh_long;      /* expanded form */
1532 };
1533
1534 /* For saving the current directory and later returning */
1535 struct cw {
1536 #ifdef HAVE_FCHDIR
1537    int         cw_fd;
1538 #else
1539    char        cw_wd[PATH_MAX];
1540 #endif
1541 };
1542
1543 /*
1544  * Global variable declarations
1545  *
1546  * These become instantiated in main.c.
1547  */
1548
1549 #undef VL
1550 #ifdef _MAIN_SOURCE
1551 # ifndef HAVE_AMALGAMATION
1552 #  define VL
1553 # else
1554 #  define VL            static
1555 # endif
1556 #else
1557 # define VL             extern
1558 #endif
1559
1560 VL gid_t       effectivegid;        /* Saved from when we started up */
1561 VL gid_t       realgid;             /* Saved from when we started up */
1562
1563 VL int         mb_cur_max;          /* Value of MB_CUR_MAX */
1564 VL int         realscreenheight;    /* The real screen height */
1565 VL int         scrnwidth;           /* Screen width, or best guess */
1566 VL int         scrnheight;          /* Screen height/guess (4 header) */
1567 VL int         enc_has_state;       /* Encoding has shift states */
1568
1569 VL char        **altnames;          /* List of alternate names of user */
1570 VL char const  *homedir;            /* Path name of home directory */
1571 VL char const  *myname;             /* My login name */
1572 VL char const  *progname;           /* Our name */
1573 VL char const  *tempdir;            /* The temporary directory */
1574
1575 VL int         exit_status;         /* Exit status */
1576 VL int         options;             /* Bits of enum user_options */
1577 VL char        *option_r_arg;       /* Argument to -r option */
1578 VL char const  **smopts;            /* sendmail(1) opts from commline */
1579 VL size_t      smopts_count;        /* Entries in smopts */
1580
1581 /* TODO Join as many of these state machine bits into a single carrier! */
1582 VL int         inhook;              /* Currently executing a hook */
1583 VL bool_t      exec_last_comm_error; /* Last execute() command failed */
1584 VL bool_t      edit;                /* Indicates editing a file */
1585 VL bool_t      did_print_dot;       /* Current message has been printed */
1586 VL bool_t      list_saw_numbers;    /* Last *LIST saw numerics */
1587 VL bool_t      msglist_is_single;   /* Last NDMLIST/MSGLIST chose 1 msg */
1588 VL bool_t      loading;             /* Loading user definitions */
1589 VL bool_t      sourcing;            /* Currently reading variant file */
1590 VL bool_t      sawcom;              /* Set after first command */
1591 VL bool_t      starting;            /* Still in startup code */
1592 VL bool_t      var_clear_allow_undefined; /* v?ok_[bv]clear(): no complain */
1593 VL int         noreset;             /* String resets suspended */
1594
1595 /* XXX stylish sorting */
1596 VL int            msgCount;            /* Count of messages read in */
1597 VL struct mailbox mb;                  /* Current mailbox */
1598 VL int            image;               /* File descriptor for msg image */
1599 VL char           mailname[PATH_MAX];  /* Name of current file TODO URL/object*/
1600 VL char           displayname[80 - 40]; /* Prettyfied for display TODO URL/obj*/
1601 VL char           prevfile[PATH_MAX];  /* Name of previous file TODO URL/obj */
1602 VL char const     *account_name;       /* Current account name or NULL */
1603 VL off_t          mailsize;            /* Size of system mailbox */
1604 VL struct message *dot;                /* Pointer to current message */
1605 VL struct message *prevdot;            /* Previous current message */
1606 VL struct message *message;            /* The actual message structure */
1607 VL struct message *threadroot;         /* first threaded message */
1608 VL int            imap_created_mailbox; /* hack to get feedback from imap */
1609
1610 VL struct grouphead  *groups[HSHSIZE]; /* Pointer to active groups */
1611 VL struct ignoretab  ignore[2];        /* ignored and retained fields
1612                                         * 0 is ignore, 1 is retain */
1613 VL struct ignoretab  saveignore[2];    /* ignored and retained fields
1614                                         * on save to folder */
1615 VL struct ignoretab  allignore[2];     /* special, ignore all headers */
1616 VL struct ignoretab  fwdignore[2];     /* fields to ignore for forwarding */
1617 VL struct shortcut   *shortcuts;       /* list of shortcuts */
1618
1619 VL struct time_current  time_current;  /* time(3); send: mail1() XXXcarrier */
1620 VL struct termios_state termios_state; /* getpassword(); see commands().. */
1621
1622 #ifdef HAVE_COLOUR
1623 VL struct colour_table  *colour_table;
1624 #endif
1625
1626 #ifdef HAVE_SSL
1627 VL enum ssl_verify_level   ssl_verify_level; /* SSL verification level */
1628 #endif
1629
1630 #ifdef HAVE_ICONV
1631 VL iconv_t     iconvd;
1632 #endif
1633
1634 VL sigjmp_buf  srbuf;
1635 VL int         interrupts;
1636 VL sighandler_type dflpipe;
1637 VL sighandler_type handlerstacktop;
1638 #define handlerpush(f)  (savedtop = handlerstacktop, handlerstacktop = (f))
1639 #define handlerpop()    (handlerstacktop = savedtop)
1640
1641 /* TODO Temporary hacks unless the codebase doesn't jump and uses pass-by-value
1642  * TODO carrier structs instead of locals */
1643 VL char        *temporary_arg_v_store;
1644 VL void        *temporary_localopts_store;
1645 /* TODO temporary storage to overcome which_protocol() mess (for PROTO_FILE) */
1646 VL char const  *temporary_protocol_ext;
1647
1648 /* The remaining variables need initialization */
1649
1650 #ifndef HAVE_AMALGAMATION
1651 VL char const  month_names[12 + 1][4];
1652 VL char const  weekday_names[7 + 1][4];
1653
1654 VL char const  uagent[];            /* User agent */
1655 VL char const  version[];           /* The version string */
1656 VL char const  features[];          /* The "feature string" */
1657
1658 VL uc_i const  class_char[];
1659 #endif
1660
1661 /*
1662  * Finally, let's include the function prototypes XXX embed
1663  */
1664
1665 #include "nailfuns.h"
1666
1667 /* s-it-mode */