main.c

   1 /*@ S-nail - a mail user agent derived from Berkeley Mail.
   2  *@ Startup and initialization.
   3  *@ This file is also used to materialize externals.
   4  *
   5  * Copyright (c) 2000-2004 Gunnar Ritter, Freiburg i. Br., Germany.
   6  * Copyright (c) 2012 - 2016 Steffen (Daode) Nurpmeso <steffen@sdaoden.eu>.
   7  */
   8 /*
   9  * Copyright (c) 1980, 1993
  10  *      The Regents of the University of California.  All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  * 3. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  */
  36 #undef n_FILE
  37 #define n_FILE main
  38 #define n_MAIN_SOURCE
  39
  40 #include "nail.h"
  41
  42 #include <sys/ioctl.h>
  43
  44 #include <pwd.h>
  45
  46 #ifdef HAVE_NL_LANGINFO
  47 # include <langinfo.h>
  48 #endif
  49 #ifdef HAVE_SETLOCALE
  50 # include <locale.h>
  51 #endif
  52
  53 struct a_arg {
  54    struct a_arg   *aa_next;
  55    char           *aa_file;
  56 };
  57
  58 /* (extern, but not with amalgamation, so define here) */
  59 VL char const        weekday_names[7 + 1][4] = {
  60    "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", ""
  61 };
  62 VL char const        month_names[12 + 1][4] = {
  63    "Jan", "Feb", "Mar", "Apr", "May", "Jun",
  64    "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", ""
  65 };
  66 VL char const        uagent[sizeof VAL_UAGENT] = VAL_UAGENT;
  67 VL char const n_error[sizeof n_ERROR] = N_(n_ERROR);
  68 VL ui16_t const      class_char[1 + 0x7F] = {
  69 #define a_BC C_BLANK | C_CNTRL
  70 #define a_SC C_SPACE | C_CNTRL
  71 #define a_WC C_WHITE | C_CNTRL
  72 /* 000 nul  001 soh  002 stx  003 etx  004 eot  005 enq  006 ack  007 bel */
  73    C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL,
  74 /* 010 bs   011 ht   012 nl   013 vt   014 np   015 cr   016 so   017 si */
  75    C_CNTRL, a_BC,    a_WC,    a_SC,    a_SC,    a_SC,    C_CNTRL, C_CNTRL,
  76 /* 020 dle  021 dc1  022 dc2  023 dc3  024 dc4  025 nak  026 syn  027 etb */
  77    C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL,
  78 /* 030 can  031 em   032 sub  033 esc  034 fs   035 gs   036 rs   037 us */
  79    C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL,
  80 #undef a_WC
  81 #undef a_SC
  82 #undef a_BC
  83 /* 040 sp   041  !   042  "   043  #   044  $   045  %   046  &   047  ' */
  84    C_BLANK, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT,
  85 /* 050  (   051  )   052  *   053  +   054  ,    055  -   056  .   057  / */
  86    C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT,
  87 /* 060  0   061  1   062  2   063  3   064  4   065  5   066  6   067  7 */
  88    C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL,
  89 /* 070  8   071  9   072  :   073  ;   074  <   075  =   076  >   077  ? */
  90    C_DIGIT, C_DIGIT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT,
  91 /* 100  @   101  A   102  B   103  C   104  D   105  E   106  F   107  G */
  92    C_PUNCT, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER,
  93 /* 110  H   111  I   112  J   113  K   114  L   115  M   116  N   117  O */
  94    C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER,
  95 /* 120  P   121  Q   122  R   123  S   124  T   125  U   126  V   127  W */
  96    C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER,
  97 /* 130  X   131  Y   132  Z   133  [   134  \   135  ]   136  ^   137  _ */
  98    C_UPPER, C_UPPER, C_UPPER, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT,
  99 /* 140  `   141  a   142  b   143  c   144  d   145  e   146  f   147  g */
 100    C_PUNCT, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER,
 101 /* 150  h   151  i   152  j   153  k   154  l   155  m   156  n   157  o */
 102    C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER,
 103 /* 160  p   161  q   162  r   163  s   164  t   165  u   166  v   167  w */
 104    C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER,
 105 /* 170  x   171  y   172  z   173  {   174  |   175  }   176  ~   177 del */
 106    C_LOWER, C_LOWER, C_LOWER, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_CNTRL
 107 };
 108
 109 /* Our own little getopt(3) */
 110 static char          *_oarg;
 111 static int           _oind, /*_oerr,*/ _oopt;
 112
 113 /* Our own little getopt(3); note --help is special-treated as 'h' */
 114 static int     _getopt(int argc, char * const argv[], char const *optstring);
 115
 116 /* Perform basic startup initialization */
 117 static void    _startup(void);
 118
 119 /* Grow a char** */
 120 static size_t  _grow_cpp(char const ***cpp, size_t newsize, size_t oldcnt);
 121
 122 /* Setup some variables which we require to be valid / verified */
 123 static void    _setup_vars(void);
 124
 125 /* We're in an interactive session - compute what the screen size for printing
 126  * headers etc. should be; notify tty upon resize if *is_sighdl* is not 0.
 127  * We use the following algorithm for the height:
 128  * If baud rate < 1200, use  9
 129  * If baud rate = 1200, use 14
 130  * If baud rate > 1200, use 24 or ws_row
 131  * Width is either 80 or ws_col */
 132 static void    _setscreensize(int is_sighdl);
 133
 134 /* Ok, we are reading mail.  Decide whether we are editing a mailbox or reading
 135  * the system mailbox, and open up the right stuff */
 136 static int     _rcv_mode(char const *folder, char const *Larg);
 137
 138 /* Interrupt printing of the headers */
 139 static void    _hdrstop(int signo);
 140
 141 static int
 142 _getopt(int argc, char * const argv[], char const *optstring)
 143 {
 144    static char const *lastp;
 145
 146    int rv = -1/*, colon*/;
 147    char const *curp;
 148    NYD_ENTER;
 149
 150    _oarg = NULL;
 151
 152    /*if ((colon = (optstring[0] == ':')))
 153       ++optstring;*/
 154
 155    if (lastp != NULL) {
 156       curp = lastp;
 157       lastp = NULL;
 158    } else {
 159       if (_oind >= argc || argv[_oind] == NULL || argv[_oind][0] != '-' ||
 160             argv[_oind][1] == '\0')
 161          goto jleave;
 162       if (argv[_oind][1] == '-' && argv[_oind][2] == '\0') {
 163          /* We need this in for MTA arg detection (easier) ++_oind;*/
 164          goto jleave;
 165       }
 166       curp = &argv[_oind][1];
 167    }
 168
 169    for(_oopt = curp[0]; optstring[0] != '\0';){
 170       if(optstring[0] != _oopt){
 171          optstring += 1 + (optstring[1] == ':');
 172          continue;
 173       }
 174
 175       if (optstring[1] == ':') {
 176          if (curp[1] != '\0') {
 177             _oarg = n_UNCONST(curp + 1);
 178             ++_oind;
 179          } else {
 180             if ((_oind += 2) > argc) {
 181                /*if (!colon *//*&& _oerr*//*)*/ {
 182                   n_err(_("%s: option requires an argument -- %c\n"),
 183                      argv[0], (char)_oopt);
 184                }
 185                rv = (/*colon ? ':' :*/ '?');
 186                goto jleave;
 187             }
 188             _oarg = argv[_oind - 1];
 189          }
 190       } else {
 191          if (curp[1] != '\0')
 192             lastp = curp + 1;
 193          else
 194             ++_oind;
 195       }
 196       rv = _oopt;
 197       goto jleave;
 198    }
 199
 200    /* Special support for --help, which is quite common */
 201    if (_oopt == '-' && !strcmp(curp, "-help") && curp - 1 == argv[_oind]) {
 202       ++_oind;
 203       rv = 'h';
 204       goto jleave;
 205    }
 206
 207    /* Definitive error */
 208    /*if (!colon *//*&& opterr*//*)*/
 209       n_err(_("%s: invalid option -- %c\n"), argv[0], _oopt);
 210    if (curp[1] != '\0')
 211       lastp = curp + 1;
 212    else
 213       ++_oind;
 214    _oarg = NULL;
 215    rv = '?';
 216 jleave:
 217    NYD_LEAVE;
 218    return rv;
 219 }
 220
 221 static void
 222 _startup(void)
 223 {
 224    char *cp;
 225    NYD_ENTER;
 226
 227    image = -1;
 228    dflpipe = SIG_DFL;
 229    _oind = /*_oerr =*/ 1;
 230
 231    if ((cp = strrchr(progname, '/')) != NULL)
 232       progname = ++cp;
 233
 234    /* Set up a reasonable environment */
 235
 236 #ifdef HAVE_NYD
 237    safe_signal(SIGABRT, &_nyd_oncrash);
 238 # ifdef SIGBUS
 239    safe_signal(SIGBUS, &_nyd_oncrash);
 240 # endif
 241    safe_signal(SIGFPE, &_nyd_oncrash);
 242    safe_signal(SIGILL, &_nyd_oncrash);
 243    safe_signal(SIGSEGV, &_nyd_oncrash);
 244 #endif
 245    command_manager_start();
 246
 247    if (isatty(STDIN_FILENO)) /* TODO should be isatty(0) && isatty(2)?? */
 248       options |= OPT_TTYIN;
 249    if (isatty(STDOUT_FILENO))
 250       options |= OPT_TTYOUT;
 251    if ((options & (OPT_TTYIN | OPT_TTYOUT)) == (OPT_TTYIN | OPT_TTYOUT)) {
 252       options |= OPT_INTERACTIVE;
 253       safe_signal(SIGPIPE, dflpipe = SIG_IGN);
 254    }
 255
 256    /*  --  >8  --  8<  --  */
 257
 258 #ifndef HAVE_SETLOCALE
 259    mb_cur_max = 1;
 260 #else
 261    setlocale(LC_ALL, "");
 262    mb_cur_max = MB_CUR_MAX;
 263 # ifdef HAVE_NL_LANGINFO
 264    if(ok_vlook(ttycharset) == NULL && (cp = nl_langinfo(CODESET)) != NULL)
 265       ok_vset(ttycharset, cp);
 266 # endif
 267
 268 # ifdef HAVE_C90AMEND1
 269    if(mb_cur_max > 1){
 270 #  ifdef HAVE_ALWAYS_UNICODE_LOCALE
 271       options |= OPT_UNICODE;
 272 #  else
 273       wchar_t wc;
 274       if(mbtowc(&wc, "\303\266", 2) == 2 && wc == 0xF6 &&
 275             mbtowc(&wc, "\342\202\254", 3) == 3 && wc == 0x20AC)
 276          options |= OPT_UNICODE;
 277       /* Reset possibly messed up state; luckily this also gives us an
 278        * indication whether the encoding has locking shift state sequences */
 279       if(mbtowc(&wc, NULL, mb_cur_max))
 280          options |= OPT_ENC_MBSTATE;
 281 #  endif
 282    }
 283 # endif
 284 #endif
 285
 286 #ifdef HAVE_ICONV
 287    iconvd = (iconv_t)-1;
 288 #endif
 289    NYD_LEAVE;
 290 }
 291
 292 static size_t
 293 _grow_cpp(char const ***cpp, size_t newsize, size_t oldcnt)
 294 {
 295    /* Just use auto-reclaimed storage, it will be preserved */
 296    char const **newcpp;
 297    NYD_ENTER;
 298
 299    newcpp = salloc(sizeof(char*) * newsize);
 300
 301    if (oldcnt > 0)
 302       memcpy(newcpp, *cpp, oldcnt * sizeof(char*));
 303    *cpp = newcpp;
 304    NYD_LEAVE;
 305    return newsize;
 306 }
 307
 308 static void
 309 _setup_vars(void){
 310    /* XXX furtherly check paths? */
 311    struct passwd *pwuid;
 312    char const *cp;
 313    NYD_ENTER;
 314
 315    group_id = getgid();
 316    if((pwuid = getpwuid(user_id = getuid())) == NULL)
 317       n_panic(_("Cannot associate a name with uid %lu"), (ul_i)user_id);
 318    myname = savestr(pwuid->pw_name); /* XXX replace uses with vlook(LOGNAME)! */
 319
 320    /* C99 */{
 321       char const *ep;
 322       bool_t doenv;
 323
 324       if(!(doenv = (ep = ok_vlook(LOGNAME)) == NULL) &&
 325             (doenv = strcmp(myname, ep)))
 326          n_err(_("Warning: $LOGNAME (%s) not identical to user (%s)!\n"),
 327             ep, myname);
 328       if(doenv){
 329          pstate |= PS_ROOT;
 330          ok_vset(LOGNAME, myname);
 331          pstate &= ~PS_ROOT;
 332       }
 333
 334       if((ep = ok_vlook(USER)) != NULL && strcmp(myname, ep)){
 335          n_err(_("Warning: $USER (%s) not identical to user (%s)!\n"),
 336             ep, myname);
 337          pstate |= PS_ROOT;
 338          ok_vset(USER, myname);
 339          pstate &= ~PS_ROOT;
 340       }
 341    }
 342
 343    /* XXX myfullname = pw->pw_gecos[OPTIONAL!] -> GUT THAT; TODO pw_shell */
 344
 345    /* */
 346    if((cp = ok_vlook(HOME)) == NULL){
 347       cp = pwuid->pw_dir;
 348       pstate |= PS_ROOT;
 349       ok_vset(HOME, cp);
 350       pstate &= ~PS_ROOT;
 351    }
 352
 353    (void)ok_vlook(TMPDIR);
 354    NYD_LEAVE;
 355 }
 356
 357 static void
 358 _setscreensize(int is_sighdl) /* TODO global policy; int wraps; minvals! */
 359 {
 360    struct termios tbuf;
 361 #ifdef TIOCGWINSZ
 362    struct winsize ws;
 363 #elif defined TIOCGSIZE
 364    struct ttysize ts;
 365 #endif
 366    NYD_ENTER;
 367
 368    scrnheight = realscreenheight = scrnwidth = 0;
 369
 370    /* (Also) POSIX: LINES and COLUMNS always override.  Adjust this
 371     * a little bit to be able to honour resizes during our lifetime and
 372     * only honour it upon first run; abuse *is_sighdl* as an indicator */
 373    if (!is_sighdl) {
 374       char *cp;
 375
 376       /* We manage those variables for our child processes, so ensure they
 377        * are up to date, always */
 378       if (options & OPT_INTERACTIVE)
 379          pstate |= PS_SIGWINCH_PEND;
 380
 381       if ((cp = ok_vlook(LINES)) != NULL)
 382          scrnheight = realscreenheight = (int)strtoul(cp, NULL, 0); /* TODO */
 383       if ((cp = ok_vlook(COLUMNS)) != NULL)
 384          scrnwidth = (int)strtoul(cp, NULL, 0); /* TODO posui32= not posnum=! */
 385
 386       if (scrnwidth != 0 && scrnheight != 0)
 387          goto jleave;
 388    }
 389
 390 #ifdef TIOCGWINSZ
 391    if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1)
 392       ws.ws_col = ws.ws_row = 0;
 393 #elif defined TIOCGSIZE
 394    if (ioctl(STDOUT_FILENO, TIOCGSIZE, &ws) == -1)
 395       ts.ts_lines = ts.ts_cols = 0;
 396 #endif
 397
 398    if (scrnheight == 0) {
 399       speed_t ospeed = ((tcgetattr(STDOUT_FILENO, &tbuf) == -1)
 400             ? B9600 : cfgetospeed(&tbuf));
 401
 402       if (ospeed < B1200)
 403          scrnheight = 9;
 404       else if (ospeed == B1200)
 405          scrnheight = 14;
 406 #ifdef TIOCGWINSZ
 407       else if (ws.ws_row != 0)
 408          scrnheight = ws.ws_row;
 409 #elif defined TIOCGSIZE
 410       else if (ts.ts_lines != 0)
 411          scrnheight = ts.ts_lines;
 412 #endif
 413       else
 414          scrnheight = 24;
 415
 416 #if defined TIOCGWINSZ || defined TIOCGSIZE
 417       if (0 ==
 418 # ifdef TIOCGWINSZ
 419             (realscreenheight = ws.ws_row)
 420 # else
 421             (realscreenheight = ts.ts_lines)
 422 # endif
 423       )
 424          realscreenheight = 24;
 425 #endif
 426    }
 427
 428    if (scrnwidth == 0 && 0 ==
 429 #ifdef TIOCGWINSZ
 430          (scrnwidth = ws.ws_col)
 431 #elif defined TIOCGSIZE
 432          (scrnwidth = ts.ts_cols)
 433 #endif
 434    )
 435       scrnwidth = 80;
 436
 437 jleave:
 438 #ifdef SIGWINCH
 439    if (is_sighdl) {
 440       pstate |= PS_SIGWINCH_PEND; /* XXX Not atomic */
 441       if (options & OPT_INTERACTIVE)
 442          n_tty_signal(SIGWINCH);
 443    }
 444 #endif
 445    NYD_LEAVE;
 446 }
 447
 448 static sigjmp_buf __hdrjmp; /* XXX */
 449
 450 static int
 451 _rcv_mode(char const *folder, char const *Larg)
 452 {
 453    int i;
 454    sighandler_type prevint;
 455    NYD_ENTER;
 456
 457    if (folder == NULL)
 458       folder = "%";
 459
 460    if (options & OPT_QUICKRUN_MASK)
 461       i = FEDIT_RDONLY;
 462    else
 463       i = FEDIT_NONE;
 464    i = setfile(folder, i);
 465    if (i < 0) {
 466       exit_status = EXIT_ERR; /* error already reported */
 467       goto jquit;
 468    }
 469    if (options & OPT_QUICKRUN_MASK) {
 470       exit_status = i;
 471       if (i == EXIT_OK && (!(options & OPT_EXISTONLY) ||
 472             (options & OPT_HEADERLIST)))
 473          print_header_summary(Larg);
 474       goto jquit;
 475    }
 476    check_folder_hook(FAL0);
 477
 478    if (i > 0 && !ok_blook(emptystart)) {
 479       exit_status = EXIT_ERR;
 480       goto jleave;
 481    }
 482
 483    if (sigsetjmp(__hdrjmp, 1) == 0) {
 484       if ((prevint = safe_signal(SIGINT, SIG_IGN)) != SIG_IGN)
 485          safe_signal(SIGINT, _hdrstop);
 486       if (!(options & OPT_N_FLAG)) {
 487          if (!ok_blook(quiet))
 488             printf(_("%s version %s.  Type `?' for help\n"),
 489                (ok_blook(bsdcompat) ? "Mail" : uagent), ok_vlook(version));
 490          announce(1);
 491          fflush(stdout);
 492       }
 493       safe_signal(SIGINT, prevint);
 494    }
 495
 496    /* Enter the command loop */
 497    if (options & OPT_INTERACTIVE)
 498       n_tty_init();
 499    n_commands();
 500    if (options & OPT_INTERACTIVE)
 501       n_tty_destroy();
 502
 503    if (mb.mb_type == MB_FILE || mb.mb_type == MB_MAILDIR) {
 504       safe_signal(SIGHUP, SIG_IGN);
 505       safe_signal(SIGINT, SIG_IGN);
 506       safe_signal(SIGQUIT, SIG_IGN);
 507    }
 508 jquit:
 509    save_mbox_for_possible_quitstuff();
 510    quit();
 511 jleave:
 512    NYD_LEAVE;
 513    return exit_status;
 514 }
 515
 516 static void
 517 _hdrstop(int signo)
 518 {
 519    NYD_X; /* Signal handler */
 520    n_UNUSED(signo);
 521
 522    fflush(stdout);
 523    n_err_sighdl(_("\nInterrupt\n"));
 524    siglongjmp(__hdrjmp, 1);
 525 }
 526
 527 int
 528 main(int argc, char *argv[]){
 529    /* Keep in SYNC: ./nail.1:"SYNOPSIS, main() */
 530    static char const
 531       optstr[] = "A:a:Bb:c:dEeFfHhiL:M:m:NnO:q:Rr:S:s:tu:VvX:::~#.",
 532       usagestr[] = N_(
 533          "Synopsis:\n"
 534          "  %s -h\n"
 535
 536          "  %s [-BdEFintv~] [-: spec] [-A account]\n"
 537          "\t [-a attachment] [-b bcc-addr] [-c cc-addr]\n"
 538          "\t [-M type | -m file | -q file | -t]\n"
 539          "\t [-r from-addr] [-S var[=value]..]\n"
 540          "\t [-s subject] [-X cmd] [-.] to-addr.. [-- mta-option..]\n"
 541
 542          "  %s [-BdEeHiNnRv~] [-: spec] [-A account]\n"
 543          "\t [-L spec-list] [-r from-addr] [-S var[=value]..]\n"
 544          "\t [-u user] [-X cmd] [-- mta-option..]\n"
 545
 546          "  %s [-BdEeHiNnRv~#] [-: spec] [-A account] -f\n"
 547          "\t [-L spec-list] [-r from-addr] [-S var[=value]..]\n"
 548          "\t [-X cmd] [file] [-- mta-option..]\n"
 549       );
 550 #define _USAGE_ARGS , progname, progname, progname, progname
 551
 552    struct a_arg *a_head, *a_curr;
 553    struct name *to, *cc, *bcc;
 554    struct attachment *attach;
 555    char *cp, *subject, *qf, *Aarg, *Larg;
 556    char const *okey, **oargs, **Xargs, *folder, *emsg;
 557    size_t oargs_size, oargs_cnt, Xargs_size, Xargs_cnt, smopts_size;
 558    enum{
 559       a_RF_NONE = 0,
 560       a_RF_SET = 1<<0,
 561       a_RF_SYSTEM = 1<<1,
 562       a_RF_USER = 1<<2,
 563       a_RF_ALL = a_RF_SYSTEM | a_RF_USER
 564    } resfiles;
 565    int i;
 566    NYD_ENTER;
 567
 568    a_head = NULL;
 569    n_UNINIT(a_curr, NULL);
 570    to = cc = bcc = NULL;
 571    attach = NULL;
 572    cp = subject = qf =
 573          Aarg = Larg = NULL;
 574    oargs = Xargs = NULL;
 575    folder = emsg = NULL;
 576    oargs_size = oargs_cnt = Xargs_size = Xargs_cnt = smopts_size = 0;
 577    resfiles = a_RF_ALL;
 578
 579    /*
 580     * Start our lengthy setup, finalize by setting PS_STARTED
 581     */
 582
 583    progname = argv[0];
 584    _startup();
 585
 586    /* Command line parsing
 587     * Variable settings need to be done twice, since the user surely wants the
 588     * setting to take effect immediately, but also doesn't want it to be
 589     * overwritten from within resource files */
 590    while ((i = _getopt(argc, argv, optstr)) >= 0) {
 591       switch (i) {
 592       case 'A':
 593          /* Execute an account command later on */
 594          Aarg = _oarg;
 595          break;
 596       case 'a':
 597          options |= OPT_SENDMODE;
 598          {  struct a_arg *nap = salloc(sizeof(struct a_arg));
 599             if (a_head == NULL)
 600                a_head = nap;
 601             else
 602                a_curr->aa_next = nap;
 603             nap->aa_next = NULL;
 604             nap->aa_file = _oarg;
 605             a_curr = nap;
 606          }
 607          break;
 608       case 'B':
 609          /* Make 0/1 line buffered */
 610          setvbuf(stdin, NULL, _IOLBF, 0);
 611          setvbuf(stdout, NULL, _IOLBF, 0);
 612          break;
 613       case 'b':
 614          /* Get Blind Carbon Copy Recipient list */
 615          options |= OPT_SENDMODE;
 616          bcc = cat(bcc, lextract(_oarg, GBCC | GFULL));
 617          break;
 618       case 'c':
 619          /* Get Carbon Copy Recipient list */
 620          options |= OPT_SENDMODE;
 621          cc = cat(cc, lextract(_oarg, GCC | GFULL));
 622          break;
 623       case 'd':
 624          ok_bset(debug);
 625          okey = "debug";
 626          goto joarg;
 627       case 'E':
 628          ok_bset(skipemptybody);
 629          okey = "skipemptybody";
 630          goto joarg;
 631       case 'e':
 632          options |= OPT_EXISTONLY;
 633          break;
 634       case 'F':
 635          options |= OPT_F_FLAG | OPT_SENDMODE;
 636          break;
 637       case 'f':
 638          /* User is specifying file to "edit" with Mail, as opposed to reading
 639           * system mailbox.  If no argument is given, we read his mbox file.
 640           * Check for remaining arguments later */
 641          folder = "&";
 642          break;
 643       case 'H':
 644          options |= OPT_HEADERSONLY;
 645          break;
 646       case 'h':
 647          n_err(V_(usagestr) _USAGE_ARGS);
 648          goto j_leave;
 649       case 'i':
 650          /* Ignore interrupts */
 651          ok_bset(ignore);
 652          okey = "ignore";
 653          goto joarg;
 654       case 'L':
 655          Larg = _oarg;
 656          options |= OPT_HEADERLIST;
 657          if (*Larg == '"' || *Larg == '\'') { /* TODO list.c:listspec_check() */
 658             size_t j = strlen(++Larg);
 659             if (j > 0)
 660                Larg[j - 1] = '\0';
 661          }
 662          break;
 663       case 'M':
 664          if(qf != NULL && (!(options & OPT_Mm_FLAG) || qf != (char*)-1))
 665             goto jeMmq;
 666          option_Mm_arg = _oarg;
 667          qf = (char*)-1;
 668          if(0){
 669             /* FALLTHRU*/
 670       case 'm':
 671             if(qf != NULL && (!(options & OPT_Mm_FLAG) || qf == (char*)-1))
 672                goto jeMmq;
 673             qf = _oarg;
 674          }
 675          options |= OPT_SENDMODE | OPT_Mm_FLAG;
 676          break;
 677       case 'N':
 678          /* Avoid initial header printing */
 679          ok_bclear(header);
 680          okey = "noheader";
 681          goto joarg;
 682       case 'n':
 683          /* Don't source "unspecified system start-up file" */
 684          if(resfiles & a_RF_SET){
 685             emsg = N_("-n cannot be used in conjunction with -:");
 686             goto jusage;
 687          }
 688          resfiles = a_RF_USER;
 689          break;
 690       case 'O':
 691          /* Additional options to pass-through to MTA TODO v15-compat legacy */
 692          if (smopts_cnt == smopts_size)
 693             smopts_size = _grow_cpp(&smopts, smopts_size + 8, smopts_cnt);
 694          smopts[smopts_cnt++] = _oarg;
 695          break;
 696       case 'q':
 697          if (qf != NULL && (options & OPT_Mm_FLAG)) {
 698 jeMmq:
 699             emsg = N_("Only one of -M, -m or -q may be given");
 700             goto jusage;
 701          }
 702          /* Quote file TODO drop? -Q with real quote?? what ? */
 703          options |= OPT_SENDMODE;
 704          /* Allow for now, we have to special check validity of -q- later on! */
 705          qf = (_oarg[0] == '-' && _oarg[1] == '\0') ? (char*)-1 : _oarg;
 706          break;
 707       case 'R':
 708          /* Open folders read-only */
 709          options |= OPT_R_FLAG;
 710          break;
 711       case 'r':
 712          /* Set From address. */
 713          options |= OPT_r_FLAG;
 714          if (_oarg[0] != '\0') {
 715             struct name *fa = nalloc(_oarg, GSKIN | GFULL | GFULLEXTRA);
 716
 717             if (is_addr_invalid(fa, EACM_STRICT | EACM_NOLOG)) {
 718                emsg = N_("Invalid address argument with -r");
 719                goto jusage;
 720             }
 721             option_r_arg = fa;
 722             /* TODO -r options is set in smopts, but may
 723              * TODO be overwritten by setting from= in
 724              * TODO an interactive session!
 725              * TODO Maybe disable setting of from?
 726              * TODO Warn user?  Update manual!! */
 727             okey = savecat("from=", fa->n_fullname);
 728             goto joarg;
 729          }
 730          break;
 731       case 'S':
 732          /* Set variable (TODO twice [only if successful]) */
 733          {  char *a[2];
 734             bool_t b;
 735
 736             okey = a[0] = _oarg;
 737             a[1] = NULL;
 738             pstate |= PS_ROBOT;
 739             b = (c_set(a) == 0);
 740             pstate &= ~PS_ROBOT;
 741             if(!b)
 742                break;
 743          }
 744 joarg:
 745          if (oargs_cnt == oargs_size)
 746             oargs_size = _grow_cpp(&oargs, oargs_size + 8, oargs_cnt);
 747          oargs[oargs_cnt++] = okey;
 748          break;
 749       case 's':
 750          /* Subject: */
 751          subject = _oarg;
 752          options |= OPT_SENDMODE;
 753          break;
 754       case 't':
 755          /* Read defined set of headers from mail to be sent */
 756          options |= OPT_SENDMODE | OPT_t_FLAG;
 757          break;
 758       case 'u':
 759          /* Temporarily set myname so that we can recognize the -u condition */
 760          myname = savecat("%", _oarg);
 761          break;
 762       case 'V':
 763          printf(_("%s version %s\n"), uagent, ok_vlook(version));
 764          exit_status = EXIT_OK;
 765          goto j_leave;
 766       case 'v':
 767          /* Be verbose */
 768          ok_bset(verbose);
 769          okey = "verbose";
 770          goto joarg;
 771       case 'X':
 772          /* Add to list of commands to exec before entering normal operation */
 773          if (Xargs_cnt == Xargs_size)
 774             Xargs_size = _grow_cpp(&Xargs, Xargs_size + 8, Xargs_cnt);
 775          Xargs[Xargs_cnt++] = _oarg;
 776          break;
 777       case ':':
 778          /* Control which resource files shall be loaded */
 779          if(!(resfiles & (a_RF_SET | a_RF_SYSTEM))){
 780             emsg = N_("-n cannot be used in conjunction with -:");
 781             goto jusage;
 782          }
 783          resfiles = a_RF_SET;
 784          while((i = *_oarg++) != '\0')
 785             switch(i){
 786             case 'S': case 's': resfiles |= a_RF_SYSTEM; break;
 787             case 'U': case 'u': resfiles |= a_RF_USER; break;
 788             case ':': case '/': resfiles &= ~a_RF_ALL; break;
 789             default:
 790                emsg = N_("Invalid argument of -:");
 791                goto jusage;
 792             }
 793          break;
 794       case '~':
 795          /* Enable tilde escapes even in non-interactive mode */
 796          options |= OPT_TILDE_FLAG;
 797          break;
 798       case '#':
 799          /* Work in batch mode, even if non-interactive */
 800          options |= OPT_TILDE_FLAG | OPT_BATCH_FLAG;
 801          if (oargs_cnt + 8 >= oargs_size)
 802             oargs_size = _grow_cpp(&oargs, oargs_size + 9, oargs_cnt);
 803          folder = "/dev/null";
 804          ok_vset(MAIL, folder);
 805          ok_vset(MBOX, folder);
 806          ok_bset(emptystart);
 807          ok_bclear(header);
 808          ok_vset(inbox, folder);
 809          ok_bset(quiet);
 810          ok_bset(sendwait);
 811          ok_bset(typescript_mode);
 812          oargs[oargs_cnt + 0] = "MAIL=/dev/null";
 813          oargs[oargs_cnt + 1] = "MBOX=/dev/null";
 814          oargs[oargs_cnt + 2] = "emptystart";
 815          oargs[oargs_cnt + 3] = "noheader";
 816          oargs[oargs_cnt + 4] = "inbox=/dev/null";
 817          oargs[oargs_cnt + 5] = "quiet";
 818          oargs[oargs_cnt + 6] = "sendwait";
 819          oargs[oargs_cnt + 7] = "typescript-mode";
 820          oargs_cnt += 8;
 821          break;
 822       case '.':
 823          options |= OPT_SENDMODE;
 824          goto jgetopt_done;
 825       case '?':
 826 jusage:
 827          if (emsg != NULL)
 828             n_err("%s\n", V_(emsg));
 829          n_err(V_(usagestr) _USAGE_ARGS);
 830 #undef _USAGE_ARGS
 831          exit_status = EXIT_USE;
 832          goto j_leave;
 833       }
 834    }
 835 jgetopt_done:
 836    ;
 837
 838    /* The normal arguments may be followed by MTA arguments after a "--";
 839     * however, -f may take off an argument, too, and before that.
 840     * Since MTA arguments after "--" require *expandargv*, delay parsing off
 841     * those options until after the resource files are loaded... */
 842    if ((cp = argv[i = _oind]) == NULL)
 843       ;
 844    else if (cp[0] == '-' && cp[1] == '-' && cp[2] == '\0')
 845       ++i;
 846    /* OPT_BATCH_FLAG sets to /dev/null, but -f can still be used and sets & */
 847    else if (folder != NULL && /*folder[0] == '&' &&*/ folder[1] == '\0') {
 848       folder = cp;
 849       if ((cp = argv[++i]) != NULL) {
 850          if (cp[0] != '-' || cp[1] != '-' || cp[2] != '\0') {
 851             emsg = N_("More than one file given with -f");
 852             goto jusage;
 853          }
 854          ++i;
 855       }
 856    } else {
 857       options |= OPT_SENDMODE;
 858       for (;;) {
 859          to = cat(to, lextract(cp, GTO | GFULL));
 860          if ((cp = argv[++i]) == NULL)
 861             break;
 862          if (cp[0] == '-' && cp[1] == '-' && cp[2] == '\0') {
 863             ++i;
 864             break;
 865          }
 866       }
 867    }
 868    _oind = i;
 869
 870    /* ...BUT, since we use salloc() for the MTA smopts storage we need to
 871     * allocate the necessary space for them before we fixate that storage! */
 872    while (argv[i] != NULL)
 873       ++i;
 874    if (smopts_cnt + i > smopts_size)
 875       DBG(smopts_size =) _grow_cpp(&smopts, smopts_cnt + i + 1, smopts_cnt);
 876
 877    /* Check for inconsistent arguments, fix some temporaries */
 878    if (options & OPT_SENDMODE) {
 879       /* XXX This is only because BATCH_FLAG sets *folder*=/dev/null
 880        * XXX in order to function.  Ideally that would not be needed */
 881       if (folder != NULL && !(options & OPT_BATCH_FLAG)) {
 882          emsg = N_("Cannot give -f and people to send to.");
 883          goto jusage;
 884       }
 885       if (myname != NULL) {
 886          emsg = N_("The -u option cannot be used in send mode");
 887          goto jusage;
 888       }
 889       if (!(options & OPT_t_FLAG) && to == NULL) {
 890          emsg = N_("Send options without primary recipient specified.");
 891          goto jusage;
 892       }
 893       if ((options & OPT_t_FLAG) && qf != NULL) {
 894          emsg = N_("The -M, -m, -q and -t options are mutual exclusive.");
 895          goto jusage;
 896       }
 897       if (options & (OPT_EXISTONLY | OPT_HEADERSONLY | OPT_HEADERLIST)) {
 898          emsg = N_("The -e, -H and -L options cannot be used in send mode.");
 899          goto jusage;
 900       }
 901       if (options & OPT_R_FLAG) {
 902          emsg = N_("The -R option is meaningless in send mode.");
 903          goto jusage;
 904       }
 905
 906       if (options & OPT_INTERACTIVE) {
 907          if (qf == (char*)-1) {
 908             if (!(options & OPT_Mm_FLAG))
 909                emsg = N_("-q can't use standard input when interactive.\n");
 910             goto jusage;
 911          }
 912       }
 913    } else {
 914       if (myname != NULL && folder != NULL) {
 915          emsg = N_("The options -u and -f (and -#) are mutually exclusive");
 916          goto jusage;
 917       }
 918       if ((options & (OPT_EXISTONLY | OPT_HEADERSONLY)) ==
 919             (OPT_EXISTONLY | OPT_HEADERSONLY)) {
 920          emsg = N_("The options -e and -H are mutual exclusive");
 921          goto jusage;
 922       }
 923       if ((options & (OPT_HEADERSONLY | OPT_HEADERLIST)) == /* TODO OBSOLETE */
 924             (OPT_HEADERSONLY | OPT_HEADERLIST))
 925          OBSOLETE(_("please use \"-e -L xy\" instead of \"-H -L xy\""));
 926
 927       if(myname != NULL)
 928          folder = myname;
 929    }
 930
 931    /*
 932     * Likely to go, perform more setup
 933     */
 934
 935    _setup_vars();
 936
 937    if (options & OPT_INTERACTIVE) {
 938       _setscreensize(0);
 939 #ifdef SIGWINCH
 940 # ifndef TTY_WANTS_SIGWINCH
 941       if (safe_signal(SIGWINCH, SIG_IGN) != SIG_IGN)
 942 # endif
 943          safe_signal(SIGWINCH, &_setscreensize);
 944 #endif
 945    } else
 946       scrnheight = realscreenheight = 24, scrnwidth = 80;
 947
 948    /* Fixate the current snapshot of our global auto-reclaimed storage instance.
 949     * Memory is auto-reclaimed from now on */
 950    n_memory_autorec_fixate();
 951
 952    /* load() any resource files */
 953    if(resfiles & a_RF_ALL){
 954       /* *expand() returns a savestr(), but load only uses the file name for
 955        * fopen(), so it's safe to do this */
 956       if((resfiles & a_RF_SYSTEM) && !ok_blook(NAIL_NO_SYSTEM_RC))
 957          n_load(VAL_SYSCONFDIR "/" VAL_SYSCONFRC);
 958       if(resfiles & a_RF_USER)
 959          n_load(file_expand(ok_vlook(MAILRC)));
 960       if((cp = ok_vlook(NAIL_EXTRA_RC)) != NULL)
 961          n_load(file_expand(cp));
 962    }
 963
 964    /* Ensure the -S and other command line options take precedence over
 965     * anything that may have been placed in resource files.
 966     * Our "ternary binary" option *verbose* needs special treament */
 967    if ((options & (OPT_VERB | OPT_VERBVERB)) == OPT_VERB)
 968       options &= ~OPT_VERB;
 969    /* ..and be silent when unsetting an undefined variable */
 970    pstate |= PS_ROBOT;
 971    for (i = 0; UICMP(z, i, <, oargs_cnt); ++i) {
 972       char const *a[2];
 973
 974       a[0] = oargs[i];
 975       a[1] = NULL;
 976       c_set(a);
 977    }
 978    pstate &= ~PS_ROBOT;
 979
 980    /* Cause possible umask(2), now that any setting is established, and before
 981     * we change accounts, evaluate commands etc. */
 982    (void)ok_vlook(umask);
 983
 984    /* Additional options to pass-through to MTA, and allowed to do so? */
 985    if ((cp = ok_vlook(expandargv)) != NULL) {
 986       bool_t isfail = !asccasecmp(cp, "fail"),
 987          isrestrict = (!isfail && !asccasecmp(cp, "restrict"));
 988
 989       if ((options & OPT_D_V) && !isfail && !isrestrict && *cp != '\0')
 990          n_err(_("Unknown *expandargv* value: %s\n"), cp);
 991
 992       if ((cp = argv[i = _oind]) != NULL) {
 993          if (isfail ||
 994                (isrestrict && !(options & (OPT_INTERACTIVE |OPT_TILDE_FLAG)))) {
 995             n_err(_("*expandargv* doesn't allow MTA arguments; consider "
 996                "using *sendmail-arguments*\n"));
 997             exit_status = EXIT_USE | EXIT_SEND_ERROR;
 998             goto jleave;
 999          }
1000          do {
1001             assert(smopts_cnt + 1 <= smopts_size);
1002             smopts[smopts_cnt++] = cp;
1003          } while ((cp = argv[++i]) != NULL);
1004       }
1005    }
1006
1007    /* We had to wait until the resource files are loaded and any command line
1008     * setting has been restored, but get the termcap up and going before we
1009     * switch account or running commands */
1010 #ifdef n_HAVE_TCAP
1011    if((options & (OPT_INTERACTIVE | OPT_QUICKRUN_MASK)) == OPT_INTERACTIVE)
1012       n_termcap_init();
1013 #endif
1014
1015    /* Now we can set the account */
1016    if (Aarg != NULL) {
1017       char const *a[2];
1018       a[0] = Aarg;
1019       a[1] = NULL;
1020       c_account(a);
1021    }
1022
1023    /* "load()" commands given on command line */
1024    if(Xargs_cnt > 0)
1025       n_load_Xargs(Xargs, Xargs_cnt);
1026
1027    /* Final tests */
1028    if(options & OPT_Mm_FLAG){
1029       if(qf == (char*)-1){
1030          if(!mime_type_check_mtname(option_Mm_arg)){
1031             n_err(_("Could not find `mimetype' for -M argument: %s\n"),
1032                option_Mm_arg);
1033             exit_status = EXIT_ERR;
1034             goto jleave;
1035          }
1036       }else if((option_Mm_arg = mime_type_classify_filename(qf)) == NULL){
1037          n_err(_("Could not `mimetype'-classify -m argument: %s\n"),
1038             n_shexp_quote_cp(qf, FAL0));
1039          exit_status = EXIT_ERR;
1040          goto jleave;
1041       }else if(!asccasecmp(option_Mm_arg, "text/plain")) /* TODO no: magic!! */
1042          option_Mm_arg = NULL;
1043    }
1044
1045    /*
1046     * We're finally completely setup and ready to go
1047     */
1048    pstate |= PS_STARTED;
1049
1050    if (!(options & OPT_SENDMODE)) {
1051       exit_status = _rcv_mode(folder, Larg);
1052       goto jleave;
1053    }
1054
1055    /* Now that full mailx(1)-style file expansion is possible handle the
1056     * attachments which we had delayed due to this.
1057     * This may use savestr(), but since we won't enter the command loop we
1058     * don't need to care about that */
1059    for (cp = NULL; a_head != NULL;) {
1060       struct attachment *nahp, *nap;
1061
1062       if ((nahp = add_attachment(n_LEXINPUT_CTX_BASE, attach, a_head->aa_file,
1063             &nap)) != NULL) {
1064          attach = nahp;
1065          /* Did we split a charset set name for fixation purposes? */
1066          if (cp != NULL) {
1067             nap->a_conv = AC_FIX_INCS;
1068             nap->a_input_charset = cp;
1069             cp = NULL;
1070          }
1071          a_head = a_head->aa_next;
1072          continue;
1073       }
1074       i = errno;
1075
1076       /* It may not have worked because of an appended character set name, so
1077        * try to split name and charset and retry once */
1078       if (cp == NULL && (cp = strrchr(a_head->aa_file, '=')) != NULL) {
1079          char *ncp, *nfp = savestrbuf(a_head->aa_file,
1080                PTR2SIZE(cp - a_head->aa_file));
1081
1082          for (ncp = ++cp; *ncp != '\0'; ++ncp)
1083             if (!alnumchar(*ncp) && !punctchar(*ncp))
1084                break;
1085          if (*ncp == '\0') {
1086             a_head->aa_file = nfp;
1087             continue;
1088          }
1089       }
1090
1091       n_perr(a_head->aa_file, i);
1092       exit_status = EXIT_ERR;
1093       goto jleave;
1094    }
1095
1096    if (options & OPT_INTERACTIVE)
1097       n_tty_init();
1098    mail(to, cc, bcc, subject, attach, qf, ((options & OPT_F_FLAG) != 0));
1099    if (options & OPT_INTERACTIVE)
1100       n_tty_destroy();
1101
1102 jleave:
1103 #ifdef n_HAVE_TCAP
1104    if((options & (OPT_INTERACTIVE | OPT_QUICKRUN_MASK)) == OPT_INTERACTIVE)
1105       n_termcap_destroy();
1106 #endif
1107 j_leave:
1108 #ifdef HAVE_MEMORY_DEBUG
1109    n_memory_autorec_pop(NULL);
1110 #endif
1111    n_memory_reset();
1112    NYD_LEAVE;
1113    return exit_status;
1114 }
1115
1116 FL int
1117 c_exit(void *v){/* TODO program state machine */
1118    NYD_ENTER;
1119    n_UNUSED(v);
1120
1121    if(pstate & PS_STARTED){
1122       if(!(pstate & PS_SOURCING)){
1123 #ifdef n_HAVE_TCAP
1124          if((options & (OPT_INTERACTIVE | OPT_QUICKRUN_MASK)) ==
1125                OPT_INTERACTIVE)
1126             n_termcap_destroy();
1127 #endif
1128          exit(EXIT_OK);
1129       }
1130    }
1131    pstate |= PS_EXIT;
1132    NYD_LEAVE;
1133    return 0;
1134 }
1135
1136 /* Source the others in that case! */
1137 #ifdef HAVE_AMALGAMATION
1138 # include "config.h"
1139 #endif
1140
1141 /* s-it-mode */