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 char const n_unirepl[sizeof n_UNIREPL] = n_UNIREPL;
  69 VL char const n_empty[1] = "";
  70 VL ui16_t const      class_char[1 + 0x7F] = {
  71 #define a_BC C_BLANK | C_CNTRL
  72 #define a_SC C_SPACE | C_CNTRL
  73 #define a_WC C_WHITE | C_CNTRL
  74 /* 000 nul  001 soh  002 stx  003 etx  004 eot  005 enq  006 ack  007 bel */
  75    C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL,
  76 /* 010 bs   011 ht   012 nl   013 vt   014 np   015 cr   016 so   017 si */
  77    C_CNTRL, a_BC,    a_WC,    a_SC,    a_SC,    a_SC,    C_CNTRL, C_CNTRL,
  78 /* 020 dle  021 dc1  022 dc2  023 dc3  024 dc4  025 nak  026 syn  027 etb */
  79    C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL,
  80 /* 030 can  031 em   032 sub  033 esc  034 fs   035 gs   036 rs   037 us */
  81    C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL,
  82 #undef a_WC
  83 #undef a_SC
  84 #undef a_BC
  85 /* 040 sp   041  !   042  "   043  #   044  $   045  %   046  &   047  ' */
  86    C_BLANK, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT,
  87 /* 050  (   051  )   052  *   053  +   054  ,    055  -   056  .   057  / */
  88    C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT,
  89 /* 060  0   061  1   062  2   063  3   064  4   065  5   066  6   067  7 */
  90    C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL,
  91 /* 070  8   071  9   072  :   073  ;   074  <   075  =   076  >   077  ? */
  92    C_DIGIT, C_DIGIT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT,
  93 /* 100  @   101  A   102  B   103  C   104  D   105  E   106  F   107  G */
  94    C_PUNCT, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER,
  95 /* 110  H   111  I   112  J   113  K   114  L   115  M   116  N   117  O */
  96    C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER,
  97 /* 120  P   121  Q   122  R   123  S   124  T   125  U   126  V   127  W */
  98    C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER,
  99 /* 130  X   131  Y   132  Z   133  [   134  \   135  ]   136  ^   137  _ */
 100    C_UPPER, C_UPPER, C_UPPER, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT,
 101 /* 140  `   141  a   142  b   143  c   144  d   145  e   146  f   147  g */
 102    C_PUNCT, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER,
 103 /* 150  h   151  i   152  j   153  k   154  l   155  m   156  n   157  o */
 104    C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER,
 105 /* 160  p   161  q   162  r   163  s   164  t   165  u   166  v   167  w */
 106    C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER,
 107 /* 170  x   171  y   172  z   173  {   174  |   175  }   176  ~   177 del */
 108    C_LOWER, C_LOWER, C_LOWER, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_CNTRL
 109 };
 110
 111 /* Our own little getopt(3) */
 112 static char          *_oarg;
 113 static int           _oind, /*_oerr,*/ _oopt;
 114
 115 /* Our own little getopt(3); note --help is special-treated as 'h' */
 116 static int     _getopt(int argc, char * const argv[], char const *optstring);
 117
 118 /* Perform basic startup initialization */
 119 static void    _startup(void);
 120
 121 /* Grow a char** */
 122 static size_t  _grow_cpp(char const ***cpp, size_t newsize, size_t oldcnt);
 123
 124 /* Setup some variables which we require to be valid / verified */
 125 static void    _setup_vars(void);
 126
 127 /* We're in an interactive session - compute what the screen size for printing
 128  * headers etc. should be; notify tty upon resize if *is_sighdl* is not 0.
 129  * We use the following algorithm for the height:
 130  * If baud rate < 1200, use  9
 131  * If baud rate = 1200, use 14
 132  * If baud rate > 1200, use 24 or ws_row
 133  * Width is either 80 or ws_col */
 134 static void    _setscreensize(int is_sighdl);
 135
 136 /* Ok, we are reading mail.  Decide whether we are editing a mailbox or reading
 137  * the system mailbox, and open up the right stuff */
 138 static int     _rcv_mode(char const *folder, char const *Larg);
 139
 140 /* Interrupt printing of the headers */
 141 static void    _hdrstop(int signo);
 142
 143 static int
 144 _getopt(int argc, char * const argv[], char const *optstring)
 145 {
 146    static char const *lastp;
 147
 148    int rv = -1/*, colon*/;
 149    char const *curp;
 150    NYD_ENTER;
 151
 152    _oarg = NULL;
 153
 154    /*if ((colon = (optstring[0] == ':')))
 155       ++optstring;*/
 156
 157    if (lastp != NULL) {
 158       curp = lastp;
 159       lastp = NULL;
 160    } else {
 161       if (_oind >= argc || argv[_oind] == NULL || argv[_oind][0] != '-' ||
 162             argv[_oind][1] == '\0')
 163          goto jleave;
 164       if (argv[_oind][1] == '-' && argv[_oind][2] == '\0') {
 165          /* We need this in for MTA arg detection (easier) ++_oind;*/
 166          goto jleave;
 167       }
 168       curp = &argv[_oind][1];
 169    }
 170
 171    for(_oopt = curp[0]; optstring[0] != '\0';){
 172       if(optstring[0] != _oopt){
 173          optstring += 1 + (optstring[1] == ':');
 174          continue;
 175       }
 176
 177       if (optstring[1] == ':') {
 178          if (curp[1] != '\0') {
 179             _oarg = n_UNCONST(curp + 1);
 180             ++_oind;
 181          } else {
 182             if ((_oind += 2) > argc) {
 183                /*if (!colon *//*&& _oerr*//*)*/ {
 184                   n_err(_("%s: option requires an argument -- %c\n"),
 185                      argv[0], (char)_oopt);
 186                }
 187                rv = (/*colon ? ':' :*/ '?');
 188                goto jleave;
 189             }
 190             _oarg = argv[_oind - 1];
 191          }
 192       } else {
 193          if (curp[1] != '\0')
 194             lastp = curp + 1;
 195          else
 196             ++_oind;
 197       }
 198       rv = _oopt;
 199       goto jleave;
 200    }
 201
 202    /* Special support for --help, which is quite common */
 203    if (_oopt == '-' && !strcmp(curp, "-help") && curp - 1 == argv[_oind]) {
 204       ++_oind;
 205       rv = 'h';
 206       goto jleave;
 207    }
 208
 209    /* Definitive error */
 210    /*if (!colon *//*&& opterr*//*)*/
 211       n_err(_("%s: invalid option -- %c\n"), argv[0], _oopt);
 212    if (curp[1] != '\0')
 213       lastp = curp + 1;
 214    else
 215       ++_oind;
 216    _oarg = NULL;
 217    rv = '?';
 218 jleave:
 219    NYD_LEAVE;
 220    return rv;
 221 }
 222
 223 static void
 224 _startup(void)
 225 {
 226    char *cp;
 227    NYD_ENTER;
 228
 229    image = -1;
 230    dflpipe = SIG_DFL;
 231    _oind = /*_oerr =*/ 1;
 232
 233    if ((cp = strrchr(progname, '/')) != NULL)
 234       progname = ++cp;
 235
 236    /* Set up a reasonable environment */
 237
 238 #ifdef HAVE_NYD
 239    safe_signal(SIGABRT, &_nyd_oncrash);
 240 # ifdef SIGBUS
 241    safe_signal(SIGBUS, &_nyd_oncrash);
 242 # endif
 243    safe_signal(SIGFPE, &_nyd_oncrash);
 244    safe_signal(SIGILL, &_nyd_oncrash);
 245    safe_signal(SIGSEGV, &_nyd_oncrash);
 246 #endif
 247    command_manager_start();
 248
 249    if (isatty(STDIN_FILENO)) /* TODO should be isatty(0) && isatty(2)?? */
 250       options |= OPT_TTYIN;
 251    if (isatty(STDOUT_FILENO))
 252       options |= OPT_TTYOUT;
 253    if ((options & (OPT_TTYIN | OPT_TTYOUT)) == (OPT_TTYIN | OPT_TTYOUT)) {
 254       options |= OPT_INTERACTIVE;
 255       safe_signal(SIGPIPE, dflpipe = SIG_IGN);
 256    }
 257
 258    /*  --  >8  --  8<  --  */
 259
 260 #ifndef HAVE_SETLOCALE
 261    mb_cur_max = 1;
 262 #else
 263    setlocale(LC_ALL, n_empty);
 264    mb_cur_max = MB_CUR_MAX;
 265 # ifdef HAVE_NL_LANGINFO
 266    if(ok_vlook(ttycharset) == NULL && (cp = nl_langinfo(CODESET)) != NULL)
 267       ok_vset(ttycharset, cp);
 268 # endif
 269
 270 # ifdef HAVE_C90AMEND1
 271    if(mb_cur_max > 1){
 272 #  ifdef HAVE_ALWAYS_UNICODE_LOCALE
 273       options |= OPT_UNICODE;
 274 #  else
 275       wchar_t wc;
 276       if(mbtowc(&wc, "\303\266", 2) == 2 && wc == 0xF6 &&
 277             mbtowc(&wc, "\342\202\254", 3) == 3 && wc == 0x20AC)
 278          options |= OPT_UNICODE;
 279       /* Reset possibly messed up state; luckily this also gives us an
 280        * indication whether the encoding has locking shift state sequences */
 281       if(mbtowc(&wc, NULL, mb_cur_max))
 282          options |= OPT_ENC_MBSTATE;
 283 #  endif
 284    }
 285 # endif
 286 #endif
 287
 288 #ifdef HAVE_ICONV
 289    iconvd = (iconv_t)-1;
 290 #endif
 291    NYD_LEAVE;
 292 }
 293
 294 static size_t
 295 _grow_cpp(char const ***cpp, size_t newsize, size_t oldcnt)
 296 {
 297    /* Just use auto-reclaimed storage, it will be preserved */
 298    char const **newcpp;
 299    NYD_ENTER;
 300
 301    newcpp = salloc(sizeof(char*) * newsize);
 302
 303    if (oldcnt > 0)
 304       memcpy(newcpp, *cpp, oldcnt * sizeof(char*));
 305    *cpp = newcpp;
 306    NYD_LEAVE;
 307    return newsize;
 308 }
 309
 310 static void
 311 _setup_vars(void){
 312    /* XXX furtherly check paths? */
 313    struct passwd *pwuid;
 314    char const *cp;
 315    NYD_ENTER;
 316
 317    group_id = getgid();
 318    if((pwuid = getpwuid(user_id = getuid())) == NULL)
 319       n_panic(_("Cannot associate a name with uid %lu"), (ul_i)user_id);
 320    myname = savestr(pwuid->pw_name); /* XXX replace uses with vlook(LOGNAME)! */
 321
 322    /* C99 */{
 323       char const *ep;
 324       bool_t doenv;
 325
 326       if(!(doenv = (ep = ok_vlook(LOGNAME)) == NULL) &&
 327             (doenv = strcmp(myname, ep)))
 328          n_err(_("Warning: $LOGNAME (%s) not identical to user (%s)!\n"),
 329             ep, myname);
 330       if(doenv){
 331          pstate |= PS_ROOT;
 332          ok_vset(LOGNAME, myname);
 333          pstate &= ~PS_ROOT;
 334       }
 335
 336       if((ep = ok_vlook(USER)) != NULL && strcmp(myname, ep)){
 337          n_err(_("Warning: $USER (%s) not identical to user (%s)!\n"),
 338             ep, myname);
 339          pstate |= PS_ROOT;
 340          ok_vset(USER, myname);
 341          pstate &= ~PS_ROOT;
 342       }
 343    }
 344
 345    /* XXX myfullname = pw->pw_gecos[OPTIONAL!] -> GUT THAT; TODO pw_shell */
 346
 347    /* */
 348    if((cp = ok_vlook(HOME)) == NULL){
 349       cp = pwuid->pw_dir;
 350       pstate |= PS_ROOT;
 351       ok_vset(HOME, cp);
 352       pstate &= ~PS_ROOT;
 353    }
 354
 355    /* Ensure some variables get loaded */
 356    (void)ok_blook(POSIXLY_CORRECT);
 357    (void)ok_vlook(TMPDIR);
 358    NYD_LEAVE;
 359 }
 360
 361 static void
 362 _setscreensize(int is_sighdl) /* TODO global policy; int wraps; minvals! */
 363 {
 364    struct termios tbuf;
 365 #ifdef TIOCGWINSZ
 366    struct winsize ws;
 367 #elif defined TIOCGSIZE
 368    struct ttysize ts;
 369 #endif
 370    NYD_ENTER;
 371
 372    scrnheight = realscreenheight = scrnwidth = 0;
 373
 374    /* (Also) POSIX: LINES and COLUMNS always override.  Adjust this
 375     * a little bit to be able to honour resizes during our lifetime and
 376     * only honour it upon first run; abuse *is_sighdl* as an indicator */
 377    if (!is_sighdl) {
 378       char *cp;
 379
 380       /* We manage those variables for our child processes, so ensure they
 381        * are up to date, always */
 382       if (options & OPT_INTERACTIVE)
 383          pstate |= PS_SIGWINCH_PEND;
 384
 385       if ((cp = ok_vlook(LINES)) != NULL)
 386          scrnheight = realscreenheight = (int)strtoul(cp, NULL, 0); /* TODO */
 387       if ((cp = ok_vlook(COLUMNS)) != NULL)
 388          scrnwidth = (int)strtoul(cp, NULL, 0); /* TODO posui32= not posnum=! */
 389
 390       if (scrnwidth != 0 && scrnheight != 0)
 391          goto jleave;
 392    }
 393
 394 #ifdef TIOCGWINSZ
 395    if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1)
 396       ws.ws_col = ws.ws_row = 0;
 397 #elif defined TIOCGSIZE
 398    if (ioctl(STDOUT_FILENO, TIOCGSIZE, &ws) == -1)
 399       ts.ts_lines = ts.ts_cols = 0;
 400 #endif
 401
 402    if (scrnheight == 0) {
 403       speed_t ospeed = ((tcgetattr(STDOUT_FILENO, &tbuf) == -1)
 404             ? B9600 : cfgetospeed(&tbuf));
 405
 406       if (ospeed < B1200)
 407          scrnheight = 9;
 408       else if (ospeed == B1200)
 409          scrnheight = 14;
 410 #ifdef TIOCGWINSZ
 411       else if (ws.ws_row != 0)
 412          scrnheight = ws.ws_row;
 413 #elif defined TIOCGSIZE
 414       else if (ts.ts_lines != 0)
 415          scrnheight = ts.ts_lines;
 416 #endif
 417       else
 418          scrnheight = 24;
 419
 420 #if defined TIOCGWINSZ || defined TIOCGSIZE
 421       if (0 ==
 422 # ifdef TIOCGWINSZ
 423             (realscreenheight = ws.ws_row)
 424 # else
 425             (realscreenheight = ts.ts_lines)
 426 # endif
 427       )
 428          realscreenheight = 24;
 429 #endif
 430    }
 431
 432    if (scrnwidth == 0 && 0 ==
 433 #ifdef TIOCGWINSZ
 434          (scrnwidth = ws.ws_col)
 435 #elif defined TIOCGSIZE
 436          (scrnwidth = ts.ts_cols)
 437 #endif
 438    )
 439       scrnwidth = 80;
 440
 441 jleave:
 442 #ifdef SIGWINCH
 443    if (is_sighdl) {
 444       pstate |= PS_SIGWINCH_PEND; /* XXX Not atomic */
 445       if (options & OPT_INTERACTIVE)
 446          n_tty_signal(SIGWINCH);
 447    }
 448 #endif
 449    NYD_LEAVE;
 450 }
 451
 452 static sigjmp_buf __hdrjmp; /* XXX */
 453
 454 static int
 455 _rcv_mode(char const *folder, char const *Larg)
 456 {
 457    int i;
 458    sighandler_type prevint;
 459    NYD_ENTER;
 460
 461    if (folder == NULL)
 462       folder = "%";
 463
 464    if (options & OPT_QUICKRUN_MASK)
 465       i = FEDIT_RDONLY;
 466    else
 467       i = FEDIT_NONE;
 468    i = setfile(folder, i);
 469    if (i < 0) {
 470       exit_status = EXIT_ERR; /* error already reported */
 471       goto jquit;
 472    }
 473    if (options & OPT_QUICKRUN_MASK) {
 474       exit_status = i;
 475       if (i == EXIT_OK && (!(options & OPT_EXISTONLY) ||
 476             (options & OPT_HEADERLIST)))
 477          print_header_summary(Larg);
 478       goto jquit;
 479    }
 480    check_folder_hook(FAL0);
 481
 482    if (i > 0 && !ok_blook(emptystart)) {
 483       exit_status = EXIT_ERR;
 484       goto jleave;
 485    }
 486
 487    if (sigsetjmp(__hdrjmp, 1) == 0) {
 488       if ((prevint = safe_signal(SIGINT, SIG_IGN)) != SIG_IGN)
 489          safe_signal(SIGINT, _hdrstop);
 490       if (!(options & OPT_N_FLAG)) {
 491          if (!ok_blook(quiet))
 492             printf(_("%s version %s.  Type `?' for help\n"),
 493                (ok_blook(bsdcompat) ? "Mail" : uagent), ok_vlook(version));
 494          announce(1);
 495          fflush(stdout);
 496       }
 497       safe_signal(SIGINT, prevint);
 498    }
 499
 500    /* Enter the command loop */
 501    if (options & OPT_INTERACTIVE)
 502       n_tty_init();
 503    n_commands();
 504    if (options & OPT_INTERACTIVE)
 505       n_tty_destroy();
 506
 507    if (mb.mb_type == MB_FILE || mb.mb_type == MB_MAILDIR) {
 508       safe_signal(SIGHUP, SIG_IGN);
 509       safe_signal(SIGINT, SIG_IGN);
 510       safe_signal(SIGQUIT, SIG_IGN);
 511    }
 512 jquit:
 513    save_mbox_for_possible_quitstuff();
 514    quit(FAL0);
 515 jleave:
 516    NYD_LEAVE;
 517    return exit_status;
 518 }
 519
 520 static void
 521 _hdrstop(int signo)
 522 {
 523    NYD_X; /* Signal handler */
 524    n_UNUSED(signo);
 525
 526    fflush(stdout);
 527    n_err_sighdl(_("\nInterrupt\n"));
 528    siglongjmp(__hdrjmp, 1);
 529 }
 530
 531 int
 532 main(int argc, char *argv[]){
 533    /* Keep in SYNC: ./nail.1:"SYNOPSIS, main() */
 534    static char const
 535       optstr[] = "A:a:Bb:c:dEeFfHhiL:M:m:NnO:q:Rr:S:s:tu:VvX:::~#.",
 536       usagestr[] = N_(
 537          "Synopsis:\n"
 538          "  %s -h\n"
 539
 540          "  %s [-BdEFintv~] [-: spec] [-A account]\n"
 541          "\t [-a attachment] [-b bcc-addr] [-c cc-addr]\n"
 542          "\t [-M type | -m file | -q file | -t]\n"
 543          "\t [-r from-addr] [-S var[=value]..]\n"
 544          "\t [-s subject] [-X cmd] [-.] to-addr.. [-- mta-option..]\n"
 545
 546          "  %s [-BdEeHiNnRv~] [-: spec] [-A account]\n"
 547          "\t [-L spec-list] [-r from-addr] [-S var[=value]..]\n"
 548          "\t [-u user] [-X cmd] [-- mta-option..]\n"
 549
 550          "  %s [-BdEeHiNnRv~#] [-: spec] [-A account] -f\n"
 551          "\t [-L spec-list] [-r from-addr] [-S var[=value]..]\n"
 552          "\t [-X cmd] [file] [-- mta-option..]\n"
 553       );
 554 #define _USAGE_ARGS , progname, progname, progname, progname
 555
 556    struct a_arg *a_head, *a_curr;
 557    struct name *to, *cc, *bcc;
 558    struct attachment *attach;
 559    char *cp, *subject, *qf, *Aarg, *Larg;
 560    char const *okey, **oargs, **Xargs, *folder, *emsg;
 561    size_t oargs_size, oargs_cnt, Xargs_size, Xargs_cnt, smopts_size;
 562    enum{
 563       a_RF_NONE = 0,
 564       a_RF_SET = 1<<0,
 565       a_RF_SYSTEM = 1<<1,
 566       a_RF_USER = 1<<2,
 567       a_RF_ALL = a_RF_SYSTEM | a_RF_USER
 568    } resfiles;
 569    int i;
 570    NYD_ENTER;
 571
 572    a_head = NULL;
 573    n_UNINIT(a_curr, NULL);
 574    to = cc = bcc = NULL;
 575    attach = NULL;
 576    cp = subject = qf =
 577          Aarg = Larg = NULL;
 578    oargs = Xargs = NULL;
 579    folder = emsg = NULL;
 580    oargs_size = oargs_cnt = Xargs_size = Xargs_cnt = smopts_size = 0;
 581    resfiles = a_RF_ALL;
 582
 583    /*
 584     * Start our lengthy setup, finalize by setting PS_STARTED
 585     */
 586
 587    progname = argv[0];
 588    _startup();
 589
 590    /* Command line parsing
 591     * Variable settings need to be done twice, since the user surely wants the
 592     * setting to take effect immediately, but also doesn't want it to be
 593     * overwritten from within resource files */
 594    while ((i = _getopt(argc, argv, optstr)) >= 0) {
 595       switch (i) {
 596       case 'A':
 597          /* Execute an account command later on */
 598          Aarg = _oarg;
 599          break;
 600       case 'a':
 601          options |= OPT_SENDMODE;
 602          {  struct a_arg *nap = salloc(sizeof(struct a_arg));
 603             if (a_head == NULL)
 604                a_head = nap;
 605             else
 606                a_curr->aa_next = nap;
 607             nap->aa_next = NULL;
 608             nap->aa_file = _oarg;
 609             a_curr = nap;
 610          }
 611          break;
 612       case 'B':
 613          /* Make 0/1 line buffered */
 614          setvbuf(stdin, NULL, _IOLBF, 0);
 615          setvbuf(stdout, NULL, _IOLBF, 0);
 616          break;
 617       case 'b':
 618          /* Get Blind Carbon Copy Recipient list */
 619          options |= OPT_SENDMODE;
 620          bcc = cat(bcc, lextract(_oarg, GBCC | GFULL));
 621          break;
 622       case 'c':
 623          /* Get Carbon Copy Recipient list */
 624          options |= OPT_SENDMODE;
 625          cc = cat(cc, lextract(_oarg, GCC | GFULL));
 626          break;
 627       case 'd':
 628          ok_bset(debug);
 629          okey = "debug";
 630          goto joarg;
 631       case 'E':
 632          ok_bset(skipemptybody);
 633          okey = "skipemptybody";
 634          goto joarg;
 635       case 'e':
 636          options |= OPT_EXISTONLY;
 637          break;
 638       case 'F':
 639          options |= OPT_F_FLAG | OPT_SENDMODE;
 640          break;
 641       case 'f':
 642          /* User is specifying file to "edit" with Mail, as opposed to reading
 643           * system mailbox.  If no argument is given, we read his mbox file.
 644           * Check for remaining arguments later */
 645          folder = "&";
 646          break;
 647       case 'H':
 648          options |= OPT_HEADERSONLY;
 649          break;
 650       case 'h':
 651          n_err(V_(usagestr) _USAGE_ARGS);
 652          goto j_leave;
 653       case 'i':
 654          /* Ignore interrupts */
 655          ok_bset(ignore);
 656          okey = "ignore";
 657          goto joarg;
 658       case 'L':
 659          Larg = _oarg;
 660          options |= OPT_HEADERLIST;
 661          if (*Larg == '"' || *Larg == '\'') { /* TODO list.c:listspec_check() */
 662             size_t j = strlen(++Larg);
 663             if (j > 0)
 664                Larg[j - 1] = '\0';
 665          }
 666          break;
 667       case 'M':
 668          if(qf != NULL && (!(options & OPT_Mm_FLAG) || qf != (char*)-1))
 669             goto jeMmq;
 670          option_Mm_arg = _oarg;
 671          qf = (char*)-1;
 672          if(0){
 673             /* FALLTHRU*/
 674       case 'm':
 675             if(qf != NULL && (!(options & OPT_Mm_FLAG) || qf == (char*)-1))
 676                goto jeMmq;
 677             qf = _oarg;
 678          }
 679          options |= OPT_SENDMODE | OPT_Mm_FLAG;
 680          break;
 681       case 'N':
 682          /* Avoid initial header printing */
 683          ok_bclear(header);
 684          okey = "noheader";
 685          goto joarg;
 686       case 'n':
 687          /* Don't source "unspecified system start-up file" */
 688          if(resfiles & a_RF_SET){
 689             emsg = N_("-n cannot be used in conjunction with -:");
 690             goto jusage;
 691          }
 692          resfiles = a_RF_USER;
 693          break;
 694       case 'O':
 695          /* Additional options to pass-through to MTA TODO v15-compat legacy */
 696          if (smopts_cnt == smopts_size)
 697             smopts_size = _grow_cpp(&smopts, smopts_size + 8, smopts_cnt);
 698          smopts[smopts_cnt++] = _oarg;
 699          break;
 700       case 'q':
 701          if (qf != NULL && (options & OPT_Mm_FLAG)) {
 702 jeMmq:
 703             emsg = N_("Only one of -M, -m or -q may be given");
 704             goto jusage;
 705          }
 706          /* Quote file TODO drop? -Q with real quote?? what ? */
 707          options |= OPT_SENDMODE;
 708          /* Allow for now, we have to special check validity of -q- later on! */
 709          qf = (_oarg[0] == '-' && _oarg[1] == '\0') ? (char*)-1 : _oarg;
 710          break;
 711       case 'R':
 712          /* Open folders read-only */
 713          options |= OPT_R_FLAG;
 714          break;
 715       case 'r':
 716          /* Set From address. */
 717          options |= OPT_r_FLAG;
 718          if (_oarg[0] != '\0') {
 719             struct name *fa = nalloc(_oarg, GSKIN | GFULL | GFULLEXTRA);
 720
 721             if (is_addr_invalid(fa, EACM_STRICT | EACM_NOLOG)) {
 722                emsg = N_("Invalid address argument with -r");
 723                goto jusage;
 724             }
 725             option_r_arg = fa;
 726             /* TODO -r options is set in smopts, but may
 727              * TODO be overwritten by setting from= in
 728              * TODO an interactive session!
 729              * TODO Maybe disable setting of from?
 730              * TODO Warn user?  Update manual!! */
 731             okey = savecat("from=", fa->n_fullname);
 732             goto joarg;
 733          }
 734          break;
 735       case 'S':
 736          /* Set variable (TODO twice [only if successful]) */
 737          {  char *a[2];
 738             bool_t b;
 739
 740             okey = a[0] = _oarg;
 741             a[1] = NULL;
 742             pstate |= PS_ROBOT;
 743             b = (c_set(a) == 0);
 744             pstate &= ~PS_ROBOT;
 745             if(!b)
 746                break;
 747          }
 748 joarg:
 749          if (oargs_cnt == oargs_size)
 750             oargs_size = _grow_cpp(&oargs, oargs_size + 8, oargs_cnt);
 751          oargs[oargs_cnt++] = okey;
 752          break;
 753       case 's':
 754          /* Subject: */
 755          subject = _oarg;
 756          options |= OPT_SENDMODE;
 757          break;
 758       case 't':
 759          /* Read defined set of headers from mail to be sent */
 760          options |= OPT_SENDMODE | OPT_t_FLAG;
 761          break;
 762       case 'u':
 763          /* Temporarily set myname so that we can recognize the -u condition */
 764          myname = savecat("%", _oarg);
 765          break;
 766       case 'V':
 767          printf(_("%s version %s\n"), uagent, ok_vlook(version));
 768          exit_status = EXIT_OK;
 769          goto j_leave;
 770       case 'v':
 771          /* Be verbose */
 772          ok_bset(verbose);
 773          okey = "verbose";
 774          goto joarg;
 775       case 'X':
 776          /* Add to list of commands to exec before entering normal operation */
 777          if (Xargs_cnt == Xargs_size)
 778             Xargs_size = _grow_cpp(&Xargs, Xargs_size + 8, Xargs_cnt);
 779          Xargs[Xargs_cnt++] = _oarg;
 780          break;
 781       case ':':
 782          /* Control which resource files shall be loaded */
 783          if(!(resfiles & (a_RF_SET | a_RF_SYSTEM))){
 784             emsg = N_("-n cannot be used in conjunction with -:");
 785             goto jusage;
 786          }
 787          resfiles = a_RF_SET;
 788          while((i = *_oarg++) != '\0')
 789             switch(i){
 790             case 'S': case 's': resfiles |= a_RF_SYSTEM; break;
 791             case 'U': case 'u': resfiles |= a_RF_USER; break;
 792             case ':': case '/': resfiles &= ~a_RF_ALL; break;
 793             default:
 794                emsg = N_("Invalid argument of -:");
 795                goto jusage;
 796             }
 797          break;
 798       case '~':
 799          /* Enable tilde escapes even in non-interactive mode */
 800          options |= OPT_TILDE_FLAG;
 801          break;
 802       case '#':
 803          /* Work in batch mode, even if non-interactive */
 804          options |= OPT_TILDE_FLAG | OPT_BATCH_FLAG;
 805          if (oargs_cnt + 8 >= oargs_size)
 806             oargs_size = _grow_cpp(&oargs, oargs_size + 9, oargs_cnt);
 807          folder = "/dev/null";
 808          ok_vset(MAIL, folder);
 809          ok_vset(MBOX, folder);
 810          ok_bset(emptystart);
 811          ok_bclear(header);
 812          ok_vset(inbox, folder);
 813          ok_bset(quiet);
 814          ok_bset(sendwait);
 815          ok_bset(typescript_mode);
 816          oargs[oargs_cnt + 0] = "MAIL=/dev/null";
 817          oargs[oargs_cnt + 1] = "MBOX=/dev/null";
 818          oargs[oargs_cnt + 2] = "emptystart";
 819          oargs[oargs_cnt + 3] = "noheader";
 820          oargs[oargs_cnt + 4] = "inbox=/dev/null";
 821          oargs[oargs_cnt + 5] = "quiet";
 822          oargs[oargs_cnt + 6] = "sendwait";
 823          oargs[oargs_cnt + 7] = "typescript-mode";
 824          oargs_cnt += 8;
 825          break;
 826       case '.':
 827          options |= OPT_SENDMODE;
 828          goto jgetopt_done;
 829       case '?':
 830 jusage:
 831          if (emsg != NULL)
 832             n_err("%s\n", V_(emsg));
 833          n_err(V_(usagestr) _USAGE_ARGS);
 834 #undef _USAGE_ARGS
 835          exit_status = EXIT_USE;
 836          goto j_leave;
 837       }
 838    }
 839 jgetopt_done:
 840    ;
 841
 842    /* The normal arguments may be followed by MTA arguments after a "--";
 843     * however, -f may take off an argument, too, and before that.
 844     * Since MTA arguments after "--" require *expandargv*, delay parsing off
 845     * those options until after the resource files are loaded... */
 846    if ((cp = argv[i = _oind]) == NULL)
 847       ;
 848    else if (cp[0] == '-' && cp[1] == '-' && cp[2] == '\0')
 849       ++i;
 850    /* OPT_BATCH_FLAG sets to /dev/null, but -f can still be used and sets & */
 851    else if (folder != NULL && /*folder[0] == '&' &&*/ folder[1] == '\0') {
 852       folder = cp;
 853       if ((cp = argv[++i]) != NULL) {
 854          if (cp[0] != '-' || cp[1] != '-' || cp[2] != '\0') {
 855             emsg = N_("More than one file given with -f");
 856             goto jusage;
 857          }
 858          ++i;
 859       }
 860    } else {
 861       options |= OPT_SENDMODE;
 862       for (;;) {
 863          to = cat(to, lextract(cp, GTO | GFULL));
 864          if ((cp = argv[++i]) == NULL)
 865             break;
 866          if (cp[0] == '-' && cp[1] == '-' && cp[2] == '\0') {
 867             ++i;
 868             break;
 869          }
 870       }
 871    }
 872    _oind = i;
 873
 874    /* ...BUT, since we use salloc() for the MTA smopts storage we need to
 875     * allocate the necessary space for them before we fixate that storage! */
 876    while (argv[i] != NULL)
 877       ++i;
 878    if (smopts_cnt + i > smopts_size)
 879       DBG(smopts_size =) _grow_cpp(&smopts, smopts_cnt + i + 1, smopts_cnt);
 880
 881    /* Check for inconsistent arguments, fix some temporaries */
 882    if (options & OPT_SENDMODE) {
 883       /* XXX This is only because BATCH_FLAG sets *folder*=/dev/null
 884        * XXX in order to function.  Ideally that would not be needed */
 885       if (folder != NULL && !(options & OPT_BATCH_FLAG)) {
 886          emsg = N_("Cannot give -f and people to send to.");
 887          goto jusage;
 888       }
 889       if (myname != NULL) {
 890          emsg = N_("The -u option cannot be used in send mode");
 891          goto jusage;
 892       }
 893       if (!(options & OPT_t_FLAG) && to == NULL) {
 894          emsg = N_("Send options without primary recipient specified.");
 895          goto jusage;
 896       }
 897       if ((options & OPT_t_FLAG) && qf != NULL) {
 898          emsg = N_("The -M, -m, -q and -t options are mutual exclusive.");
 899          goto jusage;
 900       }
 901       if (options & (OPT_EXISTONLY | OPT_HEADERSONLY | OPT_HEADERLIST)) {
 902          emsg = N_("The -e, -H and -L options cannot be used in send mode.");
 903          goto jusage;
 904       }
 905       if (options & OPT_R_FLAG) {
 906          emsg = N_("The -R option is meaningless in send mode.");
 907          goto jusage;
 908       }
 909
 910       if (options & OPT_INTERACTIVE) {
 911          if (qf == (char*)-1) {
 912             if (!(options & OPT_Mm_FLAG))
 913                emsg = N_("-q can't use standard input when interactive.\n");
 914             goto jusage;
 915          }
 916       }
 917    } else {
 918       if (myname != NULL && folder != NULL) {
 919          emsg = N_("The options -u and -f (and -#) are mutually exclusive");
 920          goto jusage;
 921       }
 922       if ((options & (OPT_EXISTONLY | OPT_HEADERSONLY)) ==
 923             (OPT_EXISTONLY | OPT_HEADERSONLY)) {
 924          emsg = N_("The options -e and -H are mutual exclusive");
 925          goto jusage;
 926       }
 927       if ((options & (OPT_HEADERSONLY | OPT_HEADERLIST)) == /* TODO OBSOLETE */
 928             (OPT_HEADERSONLY | OPT_HEADERLIST))
 929          OBSOLETE(_("please use \"-e -L xy\" instead of \"-H -L xy\""));
 930
 931       if(myname != NULL)
 932          folder = myname;
 933    }
 934
 935    /*
 936     * Likely to go, perform more setup
 937     */
 938
 939    _setup_vars();
 940
 941    if (options & OPT_INTERACTIVE) {
 942       _setscreensize(0);
 943 #ifdef SIGWINCH
 944 # ifndef TTY_WANTS_SIGWINCH
 945       if (safe_signal(SIGWINCH, SIG_IGN) != SIG_IGN)
 946 # endif
 947          safe_signal(SIGWINCH, &_setscreensize);
 948 #endif
 949    } else
 950       scrnheight = realscreenheight = 24, scrnwidth = 80;
 951
 952    /* Fixate the current snapshot of our global auto-reclaimed storage instance.
 953     * Memory is auto-reclaimed from now on */
 954    n_memory_autorec_fixate();
 955
 956    /* load() any resource files */
 957    if(resfiles & a_RF_ALL){
 958       /* *expand() returns a savestr(), but load only uses the file name for
 959        * fopen(), so it's safe to do this */
 960       if((resfiles & a_RF_SYSTEM) && !ok_blook(NAIL_NO_SYSTEM_RC))
 961          n_load(VAL_SYSCONFDIR "/" VAL_SYSCONFRC);
 962       if(resfiles & a_RF_USER)
 963          n_load(fexpand(ok_vlook(MAILRC), FEXP_LOCAL | FEXP_NOPROTO));
 964       if((cp = ok_vlook(NAIL_EXTRA_RC)) != NULL)
 965          n_load(fexpand(cp, FEXP_LOCAL | FEXP_NOPROTO));
 966    }
 967
 968    /* Ensure the -S and other command line options take precedence over
 969     * anything that may have been placed in resource files.
 970     * Our "ternary binary" option *verbose* needs special treament */
 971    if ((options & (OPT_VERB | OPT_VERBVERB)) == OPT_VERB)
 972       options &= ~OPT_VERB;
 973    /* ..and be silent when unsetting an undefined variable */
 974    pstate |= PS_ROBOT;
 975    for (i = 0; UICMP(z, i, <, oargs_cnt); ++i) {
 976       char const *a[2];
 977
 978       a[0] = oargs[i];
 979       a[1] = NULL;
 980       c_set(a);
 981    }
 982    pstate &= ~PS_ROBOT;
 983
 984    /* Cause possible umask(2), now that any setting is established, and before
 985     * we change accounts, evaluate commands etc. */
 986    (void)ok_vlook(umask);
 987
 988    /* Additional options to pass-through to MTA, and allowed to do so? */
 989    if ((cp = ok_vlook(expandargv)) != NULL) {
 990       bool_t isfail = !asccasecmp(cp, "fail"),
 991          isrestrict = (!isfail && !asccasecmp(cp, "restrict"));
 992
 993       if ((options & OPT_D_V) && !isfail && !isrestrict && *cp != '\0')
 994          n_err(_("Unknown *expandargv* value: %s\n"), cp);
 995
 996       if ((cp = argv[i = _oind]) != NULL) {
 997          if (isfail ||
 998                (isrestrict && !(options & (OPT_INTERACTIVE |OPT_TILDE_FLAG)))) {
 999             n_err(_("*expandargv* doesn't allow MTA arguments; consider "
1000                "using *sendmail-arguments*\n"));
1001             exit_status = EXIT_USE | EXIT_SEND_ERROR;
1002             goto jleave;
1003          }
1004          do {
1005             assert(smopts_cnt + 1 <= smopts_size);
1006             smopts[smopts_cnt++] = cp;
1007          } while ((cp = argv[++i]) != NULL);
1008       }
1009    }
1010
1011    /* We had to wait until the resource files are loaded and any command line
1012     * setting has been restored, but get the termcap up and going before we
1013     * switch account or running commands */
1014 #ifdef n_HAVE_TCAP
1015    if((options & (OPT_INTERACTIVE | OPT_QUICKRUN_MASK)) == OPT_INTERACTIVE)
1016       n_termcap_init();
1017 #endif
1018
1019    /* Now we can set the account */
1020    if (Aarg != NULL) {
1021       char const *a[2];
1022       a[0] = Aarg;
1023       a[1] = NULL;
1024       c_account(a);
1025    }
1026
1027    /* "load()" commands given on command line */
1028    if(Xargs_cnt > 0)
1029       n_load_Xargs(Xargs, Xargs_cnt);
1030
1031    /* Final tests */
1032    if(options & OPT_Mm_FLAG){
1033       if(qf == (char*)-1){
1034          if(!mime_type_check_mtname(option_Mm_arg)){
1035             n_err(_("Could not find `mimetype' for -M argument: %s\n"),
1036                option_Mm_arg);
1037             exit_status = EXIT_ERR;
1038             goto jleave;
1039          }
1040       }else if((option_Mm_arg = mime_type_classify_filename(qf)) == NULL){
1041          n_err(_("Could not `mimetype'-classify -m argument: %s\n"),
1042             n_shexp_quote_cp(qf, FAL0));
1043          exit_status = EXIT_ERR;
1044          goto jleave;
1045       }else if(!asccasecmp(option_Mm_arg, "text/plain")) /* TODO no: magic!! */
1046          option_Mm_arg = NULL;
1047    }
1048
1049    /*
1050     * We're finally completely setup and ready to go
1051     */
1052    pstate |= PS_STARTED;
1053
1054    if (!(options & OPT_SENDMODE)) {
1055       exit_status = _rcv_mode(folder, Larg);
1056       goto jleave;
1057    }
1058
1059    /* Now that full mailx(1)-style file expansion is possible handle the
1060     * attachments which we had delayed due to this.
1061     * This may use savestr(), but since we won't enter the command loop we
1062     * don't need to care about that */
1063    for (cp = NULL; a_head != NULL;) {
1064       struct attachment *nahp, *nap;
1065
1066       if ((nahp = add_attachment(n_LEXINPUT_CTX_DEFAULT, attach,
1067             a_head->aa_file, &nap)) != NULL) {
1068          attach = nahp;
1069          /* Did we split a charset set name for fixation purposes? */
1070          if (cp != NULL) {
1071             nap->a_conv = AC_FIX_INCS;
1072             nap->a_input_charset = cp;
1073             cp = NULL;
1074          }
1075          a_head = a_head->aa_next;
1076          continue;
1077       }
1078       i = errno;
1079
1080       /* It may not have worked because of an appended character set name, so
1081        * try to split name and charset and retry once */
1082       if (cp == NULL && (cp = strrchr(a_head->aa_file, '=')) != NULL) {
1083          char *ncp, *nfp = savestrbuf(a_head->aa_file,
1084                PTR2SIZE(cp - a_head->aa_file));
1085
1086          for (ncp = ++cp; *ncp != '\0'; ++ncp)
1087             if (!alnumchar(*ncp) && !punctchar(*ncp))
1088                break;
1089          if (*ncp == '\0') {
1090             a_head->aa_file = nfp;
1091             continue;
1092          }
1093       }
1094
1095       n_perr(a_head->aa_file, i);
1096       exit_status = EXIT_ERR;
1097       goto jleave;
1098    }
1099
1100    if (options & OPT_INTERACTIVE)
1101       n_tty_init();
1102    mail(to, cc, bcc, subject, attach, qf, ((options & OPT_F_FLAG) != 0));
1103    if (options & OPT_INTERACTIVE)
1104       n_tty_destroy();
1105
1106 jleave:
1107 #ifdef n_HAVE_TCAP
1108    if((options & (OPT_INTERACTIVE | OPT_QUICKRUN_MASK)) == OPT_INTERACTIVE)
1109       n_termcap_destroy();
1110 #endif
1111 j_leave:
1112 #ifdef HAVE_MEMORY_DEBUG
1113    n_memory_autorec_pop(NULL);
1114 #endif
1115    n_memory_reset();
1116    NYD_LEAVE;
1117    return exit_status;
1118 }
1119
1120 FL int
1121 c_exit(void *v){/* TODO program state machine */
1122    NYD_ENTER;
1123    n_UNUSED(v);
1124
1125    if(pstate & PS_STARTED){
1126       if(!(pstate & PS_SOURCING)){
1127 #ifdef n_HAVE_TCAP
1128          if((options & (OPT_INTERACTIVE | OPT_QUICKRUN_MASK)) ==
1129                OPT_INTERACTIVE)
1130             n_termcap_destroy();
1131 #endif
1132          exit(EXIT_OK);
1133       }
1134    }
1135    pstate |= PS_EXIT;
1136    NYD_LEAVE;
1137    return 0;
1138 }
1139
1140 /* Source the others in that case! */
1141 #ifdef HAVE_AMALGAMATION
1142 # include "config.h"
1143 #endif
1144
1145 /* s-it-mode */