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    (void)ok_vlook(TMPDIR);
 356    NYD_LEAVE;
 357 }
 358
 359 static void
 360 _setscreensize(int is_sighdl) /* TODO global policy; int wraps; minvals! */
 361 {
 362    struct termios tbuf;
 363 #ifdef TIOCGWINSZ
 364    struct winsize ws;
 365 #elif defined TIOCGSIZE
 366    struct ttysize ts;
 367 #endif
 368    NYD_ENTER;
 369
 370    scrnheight = realscreenheight = scrnwidth = 0;
 371
 372    /* (Also) POSIX: LINES and COLUMNS always override.  Adjust this
 373     * a little bit to be able to honour resizes during our lifetime and
 374     * only honour it upon first run; abuse *is_sighdl* as an indicator */
 375    if (!is_sighdl) {
 376       char *cp;
 377
 378       /* We manage those variables for our child processes, so ensure they
 379        * are up to date, always */
 380       if (options & OPT_INTERACTIVE)
 381          pstate |= PS_SIGWINCH_PEND;
 382
 383       if ((cp = ok_vlook(LINES)) != NULL)
 384          scrnheight = realscreenheight = (int)strtoul(cp, NULL, 0); /* TODO */
 385       if ((cp = ok_vlook(COLUMNS)) != NULL)
 386          scrnwidth = (int)strtoul(cp, NULL, 0); /* TODO posui32= not posnum=! */
 387
 388       if (scrnwidth != 0 && scrnheight != 0)
 389          goto jleave;
 390    }
 391
 392 #ifdef TIOCGWINSZ
 393    if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1)
 394       ws.ws_col = ws.ws_row = 0;
 395 #elif defined TIOCGSIZE
 396    if (ioctl(STDOUT_FILENO, TIOCGSIZE, &ws) == -1)
 397       ts.ts_lines = ts.ts_cols = 0;
 398 #endif
 399
 400    if (scrnheight == 0) {
 401       speed_t ospeed = ((tcgetattr(STDOUT_FILENO, &tbuf) == -1)
 402             ? B9600 : cfgetospeed(&tbuf));
 403
 404       if (ospeed < B1200)
 405          scrnheight = 9;
 406       else if (ospeed == B1200)
 407          scrnheight = 14;
 408 #ifdef TIOCGWINSZ
 409       else if (ws.ws_row != 0)
 410          scrnheight = ws.ws_row;
 411 #elif defined TIOCGSIZE
 412       else if (ts.ts_lines != 0)
 413          scrnheight = ts.ts_lines;
 414 #endif
 415       else
 416          scrnheight = 24;
 417
 418 #if defined TIOCGWINSZ || defined TIOCGSIZE
 419       if (0 ==
 420 # ifdef TIOCGWINSZ
 421             (realscreenheight = ws.ws_row)
 422 # else
 423             (realscreenheight = ts.ts_lines)
 424 # endif
 425       )
 426          realscreenheight = 24;
 427 #endif
 428    }
 429
 430    if (scrnwidth == 0 && 0 ==
 431 #ifdef TIOCGWINSZ
 432          (scrnwidth = ws.ws_col)
 433 #elif defined TIOCGSIZE
 434          (scrnwidth = ts.ts_cols)
 435 #endif
 436    )
 437       scrnwidth = 80;
 438
 439 jleave:
 440 #ifdef SIGWINCH
 441    if (is_sighdl) {
 442       pstate |= PS_SIGWINCH_PEND; /* XXX Not atomic */
 443       if (options & OPT_INTERACTIVE)
 444          n_tty_signal(SIGWINCH);
 445    }
 446 #endif
 447    NYD_LEAVE;
 448 }
 449
 450 static sigjmp_buf __hdrjmp; /* XXX */
 451
 452 static int
 453 _rcv_mode(char const *folder, char const *Larg)
 454 {
 455    int i;
 456    sighandler_type prevint;
 457    NYD_ENTER;
 458
 459    if (folder == NULL)
 460       folder = "%";
 461
 462    if (options & OPT_QUICKRUN_MASK)
 463       i = FEDIT_RDONLY;
 464    else
 465       i = FEDIT_NONE;
 466    i = setfile(folder, i);
 467    if (i < 0) {
 468       exit_status = EXIT_ERR; /* error already reported */
 469       goto jquit;
 470    }
 471    if (options & OPT_QUICKRUN_MASK) {
 472       exit_status = i;
 473       if (i == EXIT_OK && (!(options & OPT_EXISTONLY) ||
 474             (options & OPT_HEADERLIST)))
 475          print_header_summary(Larg);
 476       goto jquit;
 477    }
 478    check_folder_hook(FAL0);
 479
 480    if (i > 0 && !ok_blook(emptystart)) {
 481       exit_status = EXIT_ERR;
 482       goto jleave;
 483    }
 484
 485    if (sigsetjmp(__hdrjmp, 1) == 0) {
 486       if ((prevint = safe_signal(SIGINT, SIG_IGN)) != SIG_IGN)
 487          safe_signal(SIGINT, _hdrstop);
 488       if (!(options & OPT_N_FLAG)) {
 489          if (!ok_blook(quiet))
 490             printf(_("%s version %s.  Type `?' for help\n"),
 491                (ok_blook(bsdcompat) ? "Mail" : uagent), ok_vlook(version));
 492          announce(1);
 493          fflush(stdout);
 494       }
 495       safe_signal(SIGINT, prevint);
 496    }
 497
 498    /* Enter the command loop */
 499    if (options & OPT_INTERACTIVE)
 500       n_tty_init();
 501    n_commands();
 502    if (options & OPT_INTERACTIVE)
 503       n_tty_destroy();
 504
 505    if (mb.mb_type == MB_FILE || mb.mb_type == MB_MAILDIR) {
 506       safe_signal(SIGHUP, SIG_IGN);
 507       safe_signal(SIGINT, SIG_IGN);
 508       safe_signal(SIGQUIT, SIG_IGN);
 509    }
 510 jquit:
 511    save_mbox_for_possible_quitstuff();
 512    quit(FAL0);
 513 jleave:
 514    NYD_LEAVE;
 515    return exit_status;
 516 }
 517
 518 static void
 519 _hdrstop(int signo)
 520 {
 521    NYD_X; /* Signal handler */
 522    n_UNUSED(signo);
 523
 524    fflush(stdout);
 525    n_err_sighdl(_("\nInterrupt\n"));
 526    siglongjmp(__hdrjmp, 1);
 527 }
 528
 529 int
 530 main(int argc, char *argv[]){
 531    /* Keep in SYNC: ./nail.1:"SYNOPSIS, main() */
 532    static char const
 533       optstr[] = "A:a:Bb:c:dEeFfHhiL:M:m:NnO:q:Rr:S:s:tu:VvX:::~#.",
 534       usagestr[] = N_(
 535          "Synopsis:\n"
 536          "  %s -h\n"
 537
 538          "  %s [-BdEFintv~] [-: spec] [-A account]\n"
 539          "\t [-a attachment] [-b bcc-addr] [-c cc-addr]\n"
 540          "\t [-M type | -m file | -q file | -t]\n"
 541          "\t [-r from-addr] [-S var[=value]..]\n"
 542          "\t [-s subject] [-X cmd] [-.] to-addr.. [-- mta-option..]\n"
 543
 544          "  %s [-BdEeHiNnRv~] [-: spec] [-A account]\n"
 545          "\t [-L spec-list] [-r from-addr] [-S var[=value]..]\n"
 546          "\t [-u user] [-X cmd] [-- mta-option..]\n"
 547
 548          "  %s [-BdEeHiNnRv~#] [-: spec] [-A account] -f\n"
 549          "\t [-L spec-list] [-r from-addr] [-S var[=value]..]\n"
 550          "\t [-X cmd] [file] [-- mta-option..]\n"
 551       );
 552 #define _USAGE_ARGS , progname, progname, progname, progname
 553
 554    struct a_arg *a_head, *a_curr;
 555    struct name *to, *cc, *bcc;
 556    struct attachment *attach;
 557    char *cp, *subject, *qf, *Aarg, *Larg;
 558    char const *okey, **oargs, **Xargs, *folder, *emsg;
 559    size_t oargs_size, oargs_cnt, Xargs_size, Xargs_cnt, smopts_size;
 560    enum{
 561       a_RF_NONE = 0,
 562       a_RF_SET = 1<<0,
 563       a_RF_SYSTEM = 1<<1,
 564       a_RF_USER = 1<<2,
 565       a_RF_ALL = a_RF_SYSTEM | a_RF_USER
 566    } resfiles;
 567    int i;
 568    NYD_ENTER;
 569
 570    a_head = NULL;
 571    n_UNINIT(a_curr, NULL);
 572    to = cc = bcc = NULL;
 573    attach = NULL;
 574    cp = subject = qf =
 575          Aarg = Larg = NULL;
 576    oargs = Xargs = NULL;
 577    folder = emsg = NULL;
 578    oargs_size = oargs_cnt = Xargs_size = Xargs_cnt = smopts_size = 0;
 579    resfiles = a_RF_ALL;
 580
 581    /*
 582     * Start our lengthy setup, finalize by setting PS_STARTED
 583     */
 584
 585    progname = argv[0];
 586    _startup();
 587
 588    /* Command line parsing
 589     * Variable settings need to be done twice, since the user surely wants the
 590     * setting to take effect immediately, but also doesn't want it to be
 591     * overwritten from within resource files */
 592    while ((i = _getopt(argc, argv, optstr)) >= 0) {
 593       switch (i) {
 594       case 'A':
 595          /* Execute an account command later on */
 596          Aarg = _oarg;
 597          break;
 598       case 'a':
 599          options |= OPT_SENDMODE;
 600          {  struct a_arg *nap = salloc(sizeof(struct a_arg));
 601             if (a_head == NULL)
 602                a_head = nap;
 603             else
 604                a_curr->aa_next = nap;
 605             nap->aa_next = NULL;
 606             nap->aa_file = _oarg;
 607             a_curr = nap;
 608          }
 609          break;
 610       case 'B':
 611          /* Make 0/1 line buffered */
 612          setvbuf(stdin, NULL, _IOLBF, 0);
 613          setvbuf(stdout, NULL, _IOLBF, 0);
 614          break;
 615       case 'b':
 616          /* Get Blind Carbon Copy Recipient list */
 617          options |= OPT_SENDMODE;
 618          bcc = cat(bcc, lextract(_oarg, GBCC | GFULL));
 619          break;
 620       case 'c':
 621          /* Get Carbon Copy Recipient list */
 622          options |= OPT_SENDMODE;
 623          cc = cat(cc, lextract(_oarg, GCC | GFULL));
 624          break;
 625       case 'd':
 626          ok_bset(debug);
 627          okey = "debug";
 628          goto joarg;
 629       case 'E':
 630          ok_bset(skipemptybody);
 631          okey = "skipemptybody";
 632          goto joarg;
 633       case 'e':
 634          options |= OPT_EXISTONLY;
 635          break;
 636       case 'F':
 637          options |= OPT_F_FLAG | OPT_SENDMODE;
 638          break;
 639       case 'f':
 640          /* User is specifying file to "edit" with Mail, as opposed to reading
 641           * system mailbox.  If no argument is given, we read his mbox file.
 642           * Check for remaining arguments later */
 643          folder = "&";
 644          break;
 645       case 'H':
 646          options |= OPT_HEADERSONLY;
 647          break;
 648       case 'h':
 649          n_err(V_(usagestr) _USAGE_ARGS);
 650          goto j_leave;
 651       case 'i':
 652          /* Ignore interrupts */
 653          ok_bset(ignore);
 654          okey = "ignore";
 655          goto joarg;
 656       case 'L':
 657          Larg = _oarg;
 658          options |= OPT_HEADERLIST;
 659          if (*Larg == '"' || *Larg == '\'') { /* TODO list.c:listspec_check() */
 660             size_t j = strlen(++Larg);
 661             if (j > 0)
 662                Larg[j - 1] = '\0';
 663          }
 664          break;
 665       case 'M':
 666          if(qf != NULL && (!(options & OPT_Mm_FLAG) || qf != (char*)-1))
 667             goto jeMmq;
 668          option_Mm_arg = _oarg;
 669          qf = (char*)-1;
 670          if(0){
 671             /* FALLTHRU*/
 672       case 'm':
 673             if(qf != NULL && (!(options & OPT_Mm_FLAG) || qf == (char*)-1))
 674                goto jeMmq;
 675             qf = _oarg;
 676          }
 677          options |= OPT_SENDMODE | OPT_Mm_FLAG;
 678          break;
 679       case 'N':
 680          /* Avoid initial header printing */
 681          ok_bclear(header);
 682          okey = "noheader";
 683          goto joarg;
 684       case 'n':
 685          /* Don't source "unspecified system start-up file" */
 686          if(resfiles & a_RF_SET){
 687             emsg = N_("-n cannot be used in conjunction with -:");
 688             goto jusage;
 689          }
 690          resfiles = a_RF_USER;
 691          break;
 692       case 'O':
 693          /* Additional options to pass-through to MTA TODO v15-compat legacy */
 694          if (smopts_cnt == smopts_size)
 695             smopts_size = _grow_cpp(&smopts, smopts_size + 8, smopts_cnt);
 696          smopts[smopts_cnt++] = _oarg;
 697          break;
 698       case 'q':
 699          if (qf != NULL && (options & OPT_Mm_FLAG)) {
 700 jeMmq:
 701             emsg = N_("Only one of -M, -m or -q may be given");
 702             goto jusage;
 703          }
 704          /* Quote file TODO drop? -Q with real quote?? what ? */
 705          options |= OPT_SENDMODE;
 706          /* Allow for now, we have to special check validity of -q- later on! */
 707          qf = (_oarg[0] == '-' && _oarg[1] == '\0') ? (char*)-1 : _oarg;
 708          break;
 709       case 'R':
 710          /* Open folders read-only */
 711          options |= OPT_R_FLAG;
 712          break;
 713       case 'r':
 714          /* Set From address. */
 715          options |= OPT_r_FLAG;
 716          if (_oarg[0] != '\0') {
 717             struct name *fa = nalloc(_oarg, GSKIN | GFULL | GFULLEXTRA);
 718
 719             if (is_addr_invalid(fa, EACM_STRICT | EACM_NOLOG)) {
 720                emsg = N_("Invalid address argument with -r");
 721                goto jusage;
 722             }
 723             option_r_arg = fa;
 724             /* TODO -r options is set in smopts, but may
 725              * TODO be overwritten by setting from= in
 726              * TODO an interactive session!
 727              * TODO Maybe disable setting of from?
 728              * TODO Warn user?  Update manual!! */
 729             okey = savecat("from=", fa->n_fullname);
 730             goto joarg;
 731          }
 732          break;
 733       case 'S':
 734          /* Set variable (TODO twice [only if successful]) */
 735          {  char *a[2];
 736             bool_t b;
 737
 738             okey = a[0] = _oarg;
 739             a[1] = NULL;
 740             pstate |= PS_ROBOT;
 741             b = (c_set(a) == 0);
 742             pstate &= ~PS_ROBOT;
 743             if(!b)
 744                break;
 745          }
 746 joarg:
 747          if (oargs_cnt == oargs_size)
 748             oargs_size = _grow_cpp(&oargs, oargs_size + 8, oargs_cnt);
 749          oargs[oargs_cnt++] = okey;
 750          break;
 751       case 's':
 752          /* Subject: */
 753          subject = _oarg;
 754          options |= OPT_SENDMODE;
 755          break;
 756       case 't':
 757          /* Read defined set of headers from mail to be sent */
 758          options |= OPT_SENDMODE | OPT_t_FLAG;
 759          break;
 760       case 'u':
 761          /* Temporarily set myname so that we can recognize the -u condition */
 762          myname = savecat("%", _oarg);
 763          break;
 764       case 'V':
 765          printf(_("%s version %s\n"), uagent, ok_vlook(version));
 766          exit_status = EXIT_OK;
 767          goto j_leave;
 768       case 'v':
 769          /* Be verbose */
 770          ok_bset(verbose);
 771          okey = "verbose";
 772          goto joarg;
 773       case 'X':
 774          /* Add to list of commands to exec before entering normal operation */
 775          if (Xargs_cnt == Xargs_size)
 776             Xargs_size = _grow_cpp(&Xargs, Xargs_size + 8, Xargs_cnt);
 777          Xargs[Xargs_cnt++] = _oarg;
 778          break;
 779       case ':':
 780          /* Control which resource files shall be loaded */
 781          if(!(resfiles & (a_RF_SET | a_RF_SYSTEM))){
 782             emsg = N_("-n cannot be used in conjunction with -:");
 783             goto jusage;
 784          }
 785          resfiles = a_RF_SET;
 786          while((i = *_oarg++) != '\0')
 787             switch(i){
 788             case 'S': case 's': resfiles |= a_RF_SYSTEM; break;
 789             case 'U': case 'u': resfiles |= a_RF_USER; break;
 790             case ':': case '/': resfiles &= ~a_RF_ALL; break;
 791             default:
 792                emsg = N_("Invalid argument of -:");
 793                goto jusage;
 794             }
 795          break;
 796       case '~':
 797          /* Enable tilde escapes even in non-interactive mode */
 798          options |= OPT_TILDE_FLAG;
 799          break;
 800       case '#':
 801          /* Work in batch mode, even if non-interactive */
 802          options |= OPT_TILDE_FLAG | OPT_BATCH_FLAG;
 803          if (oargs_cnt + 8 >= oargs_size)
 804             oargs_size = _grow_cpp(&oargs, oargs_size + 9, oargs_cnt);
 805          folder = "/dev/null";
 806          ok_vset(MAIL, folder);
 807          ok_vset(MBOX, folder);
 808          ok_bset(emptystart);
 809          ok_bclear(header);
 810          ok_vset(inbox, folder);
 811          ok_bset(quiet);
 812          ok_bset(sendwait);
 813          ok_bset(typescript_mode);
 814          oargs[oargs_cnt + 0] = "MAIL=/dev/null";
 815          oargs[oargs_cnt + 1] = "MBOX=/dev/null";
 816          oargs[oargs_cnt + 2] = "emptystart";
 817          oargs[oargs_cnt + 3] = "noheader";
 818          oargs[oargs_cnt + 4] = "inbox=/dev/null";
 819          oargs[oargs_cnt + 5] = "quiet";
 820          oargs[oargs_cnt + 6] = "sendwait";
 821          oargs[oargs_cnt + 7] = "typescript-mode";
 822          oargs_cnt += 8;
 823          break;
 824       case '.':
 825          options |= OPT_SENDMODE;
 826          goto jgetopt_done;
 827       case '?':
 828 jusage:
 829          if (emsg != NULL)
 830             n_err("%s\n", V_(emsg));
 831          n_err(V_(usagestr) _USAGE_ARGS);
 832 #undef _USAGE_ARGS
 833          exit_status = EXIT_USE;
 834          goto j_leave;
 835       }
 836    }
 837 jgetopt_done:
 838    ;
 839
 840    /* The normal arguments may be followed by MTA arguments after a "--";
 841     * however, -f may take off an argument, too, and before that.
 842     * Since MTA arguments after "--" require *expandargv*, delay parsing off
 843     * those options until after the resource files are loaded... */
 844    if ((cp = argv[i = _oind]) == NULL)
 845       ;
 846    else if (cp[0] == '-' && cp[1] == '-' && cp[2] == '\0')
 847       ++i;
 848    /* OPT_BATCH_FLAG sets to /dev/null, but -f can still be used and sets & */
 849    else if (folder != NULL && /*folder[0] == '&' &&*/ folder[1] == '\0') {
 850       folder = cp;
 851       if ((cp = argv[++i]) != NULL) {
 852          if (cp[0] != '-' || cp[1] != '-' || cp[2] != '\0') {
 853             emsg = N_("More than one file given with -f");
 854             goto jusage;
 855          }
 856          ++i;
 857       }
 858    } else {
 859       options |= OPT_SENDMODE;
 860       for (;;) {
 861          to = cat(to, lextract(cp, GTO | GFULL));
 862          if ((cp = argv[++i]) == NULL)
 863             break;
 864          if (cp[0] == '-' && cp[1] == '-' && cp[2] == '\0') {
 865             ++i;
 866             break;
 867          }
 868       }
 869    }
 870    _oind = i;
 871
 872    /* ...BUT, since we use salloc() for the MTA smopts storage we need to
 873     * allocate the necessary space for them before we fixate that storage! */
 874    while (argv[i] != NULL)
 875       ++i;
 876    if (smopts_cnt + i > smopts_size)
 877       DBG(smopts_size =) _grow_cpp(&smopts, smopts_cnt + i + 1, smopts_cnt);
 878
 879    /* Check for inconsistent arguments, fix some temporaries */
 880    if (options & OPT_SENDMODE) {
 881       /* XXX This is only because BATCH_FLAG sets *folder*=/dev/null
 882        * XXX in order to function.  Ideally that would not be needed */
 883       if (folder != NULL && !(options & OPT_BATCH_FLAG)) {
 884          emsg = N_("Cannot give -f and people to send to.");
 885          goto jusage;
 886       }
 887       if (myname != NULL) {
 888          emsg = N_("The -u option cannot be used in send mode");
 889          goto jusage;
 890       }
 891       if (!(options & OPT_t_FLAG) && to == NULL) {
 892          emsg = N_("Send options without primary recipient specified.");
 893          goto jusage;
 894       }
 895       if ((options & OPT_t_FLAG) && qf != NULL) {
 896          emsg = N_("The -M, -m, -q and -t options are mutual exclusive.");
 897          goto jusage;
 898       }
 899       if (options & (OPT_EXISTONLY | OPT_HEADERSONLY | OPT_HEADERLIST)) {
 900          emsg = N_("The -e, -H and -L options cannot be used in send mode.");
 901          goto jusage;
 902       }
 903       if (options & OPT_R_FLAG) {
 904          emsg = N_("The -R option is meaningless in send mode.");
 905          goto jusage;
 906       }
 907
 908       if (options & OPT_INTERACTIVE) {
 909          if (qf == (char*)-1) {
 910             if (!(options & OPT_Mm_FLAG))
 911                emsg = N_("-q can't use standard input when interactive.\n");
 912             goto jusage;
 913          }
 914       }
 915    } else {
 916       if (myname != NULL && folder != NULL) {
 917          emsg = N_("The options -u and -f (and -#) are mutually exclusive");
 918          goto jusage;
 919       }
 920       if ((options & (OPT_EXISTONLY | OPT_HEADERSONLY)) ==
 921             (OPT_EXISTONLY | OPT_HEADERSONLY)) {
 922          emsg = N_("The options -e and -H are mutual exclusive");
 923          goto jusage;
 924       }
 925       if ((options & (OPT_HEADERSONLY | OPT_HEADERLIST)) == /* TODO OBSOLETE */
 926             (OPT_HEADERSONLY | OPT_HEADERLIST))
 927          OBSOLETE(_("please use \"-e -L xy\" instead of \"-H -L xy\""));
 928
 929       if(myname != NULL)
 930          folder = myname;
 931    }
 932
 933    /*
 934     * Likely to go, perform more setup
 935     */
 936
 937    _setup_vars();
 938
 939    if (options & OPT_INTERACTIVE) {
 940       _setscreensize(0);
 941 #ifdef SIGWINCH
 942 # ifndef TTY_WANTS_SIGWINCH
 943       if (safe_signal(SIGWINCH, SIG_IGN) != SIG_IGN)
 944 # endif
 945          safe_signal(SIGWINCH, &_setscreensize);
 946 #endif
 947    } else
 948       scrnheight = realscreenheight = 24, scrnwidth = 80;
 949
 950    /* Fixate the current snapshot of our global auto-reclaimed storage instance.
 951     * Memory is auto-reclaimed from now on */
 952    n_memory_autorec_fixate();
 953
 954    /* load() any resource files */
 955    if(resfiles & a_RF_ALL){
 956       /* *expand() returns a savestr(), but load only uses the file name for
 957        * fopen(), so it's safe to do this */
 958       if((resfiles & a_RF_SYSTEM) && !ok_blook(NAIL_NO_SYSTEM_RC))
 959          n_load(VAL_SYSCONFDIR "/" VAL_SYSCONFRC);
 960       if(resfiles & a_RF_USER)
 961          n_load(file_expand(ok_vlook(MAILRC)));
 962       if((cp = ok_vlook(NAIL_EXTRA_RC)) != NULL)
 963          n_load(file_expand(cp));
 964    }
 965
 966    /* Ensure the -S and other command line options take precedence over
 967     * anything that may have been placed in resource files.
 968     * Our "ternary binary" option *verbose* needs special treament */
 969    if ((options & (OPT_VERB | OPT_VERBVERB)) == OPT_VERB)
 970       options &= ~OPT_VERB;
 971    /* ..and be silent when unsetting an undefined variable */
 972    pstate |= PS_ROBOT;
 973    for (i = 0; UICMP(z, i, <, oargs_cnt); ++i) {
 974       char const *a[2];
 975
 976       a[0] = oargs[i];
 977       a[1] = NULL;
 978       c_set(a);
 979    }
 980    pstate &= ~PS_ROBOT;
 981
 982    /* Cause possible umask(2), now that any setting is established, and before
 983     * we change accounts, evaluate commands etc. */
 984    (void)ok_vlook(umask);
 985
 986    /* Additional options to pass-through to MTA, and allowed to do so? */
 987    if ((cp = ok_vlook(expandargv)) != NULL) {
 988       bool_t isfail = !asccasecmp(cp, "fail"),
 989          isrestrict = (!isfail && !asccasecmp(cp, "restrict"));
 990
 991       if ((options & OPT_D_V) && !isfail && !isrestrict && *cp != '\0')
 992          n_err(_("Unknown *expandargv* value: %s\n"), cp);
 993
 994       if ((cp = argv[i = _oind]) != NULL) {
 995          if (isfail ||
 996                (isrestrict && !(options & (OPT_INTERACTIVE |OPT_TILDE_FLAG)))) {
 997             n_err(_("*expandargv* doesn't allow MTA arguments; consider "
 998                "using *sendmail-arguments*\n"));
 999             exit_status = EXIT_USE | EXIT_SEND_ERROR;
1000             goto jleave;
1001          }
1002          do {
1003             assert(smopts_cnt + 1 <= smopts_size);
1004             smopts[smopts_cnt++] = cp;
1005          } while ((cp = argv[++i]) != NULL);
1006       }
1007    }
1008
1009    /* We had to wait until the resource files are loaded and any command line
1010     * setting has been restored, but get the termcap up and going before we
1011     * switch account or running commands */
1012 #ifdef n_HAVE_TCAP
1013    if((options & (OPT_INTERACTIVE | OPT_QUICKRUN_MASK)) == OPT_INTERACTIVE)
1014       n_termcap_init();
1015 #endif
1016
1017    /* Now we can set the account */
1018    if (Aarg != NULL) {
1019       char const *a[2];
1020       a[0] = Aarg;
1021       a[1] = NULL;
1022       c_account(a);
1023    }
1024
1025    /* "load()" commands given on command line */
1026    if(Xargs_cnt > 0)
1027       n_load_Xargs(Xargs, Xargs_cnt);
1028
1029    /* Final tests */
1030    if(options & OPT_Mm_FLAG){
1031       if(qf == (char*)-1){
1032          if(!mime_type_check_mtname(option_Mm_arg)){
1033             n_err(_("Could not find `mimetype' for -M argument: %s\n"),
1034                option_Mm_arg);
1035             exit_status = EXIT_ERR;
1036             goto jleave;
1037          }
1038       }else if((option_Mm_arg = mime_type_classify_filename(qf)) == NULL){
1039          n_err(_("Could not `mimetype'-classify -m argument: %s\n"),
1040             n_shexp_quote_cp(qf, FAL0));
1041          exit_status = EXIT_ERR;
1042          goto jleave;
1043       }else if(!asccasecmp(option_Mm_arg, "text/plain")) /* TODO no: magic!! */
1044          option_Mm_arg = NULL;
1045    }
1046
1047    /*
1048     * We're finally completely setup and ready to go
1049     */
1050    pstate |= PS_STARTED;
1051
1052    if (!(options & OPT_SENDMODE)) {
1053       exit_status = _rcv_mode(folder, Larg);
1054       goto jleave;
1055    }
1056
1057    /* Now that full mailx(1)-style file expansion is possible handle the
1058     * attachments which we had delayed due to this.
1059     * This may use savestr(), but since we won't enter the command loop we
1060     * don't need to care about that */
1061    for (cp = NULL; a_head != NULL;) {
1062       struct attachment *nahp, *nap;
1063
1064       if ((nahp = add_attachment(n_LEXINPUT_CTX_DEFAULT, attach,
1065             a_head->aa_file, &nap)) != NULL) {
1066          attach = nahp;
1067          /* Did we split a charset set name for fixation purposes? */
1068          if (cp != NULL) {
1069             nap->a_conv = AC_FIX_INCS;
1070             nap->a_input_charset = cp;
1071             cp = NULL;
1072          }
1073          a_head = a_head->aa_next;
1074          continue;
1075       }
1076       i = errno;
1077
1078       /* It may not have worked because of an appended character set name, so
1079        * try to split name and charset and retry once */
1080       if (cp == NULL && (cp = strrchr(a_head->aa_file, '=')) != NULL) {
1081          char *ncp, *nfp = savestrbuf(a_head->aa_file,
1082                PTR2SIZE(cp - a_head->aa_file));
1083
1084          for (ncp = ++cp; *ncp != '\0'; ++ncp)
1085             if (!alnumchar(*ncp) && !punctchar(*ncp))
1086                break;
1087          if (*ncp == '\0') {
1088             a_head->aa_file = nfp;
1089             continue;
1090          }
1091       }
1092
1093       n_perr(a_head->aa_file, i);
1094       exit_status = EXIT_ERR;
1095       goto jleave;
1096    }
1097
1098    if (options & OPT_INTERACTIVE)
1099       n_tty_init();
1100    mail(to, cc, bcc, subject, attach, qf, ((options & OPT_F_FLAG) != 0));
1101    if (options & OPT_INTERACTIVE)
1102       n_tty_destroy();
1103
1104 jleave:
1105 #ifdef n_HAVE_TCAP
1106    if((options & (OPT_INTERACTIVE | OPT_QUICKRUN_MASK)) == OPT_INTERACTIVE)
1107       n_termcap_destroy();
1108 #endif
1109 j_leave:
1110 #ifdef HAVE_MEMORY_DEBUG
1111    n_memory_autorec_pop(NULL);
1112 #endif
1113    n_memory_reset();
1114    NYD_LEAVE;
1115    return exit_status;
1116 }
1117
1118 FL int
1119 c_exit(void *v){/* TODO program state machine */
1120    NYD_ENTER;
1121    n_UNUSED(v);
1122
1123    if(pstate & PS_STARTED){
1124       if(!(pstate & PS_SOURCING)){
1125 #ifdef n_HAVE_TCAP
1126          if((options & (OPT_INTERACTIVE | OPT_QUICKRUN_MASK)) ==
1127                OPT_INTERACTIVE)
1128             n_termcap_destroy();
1129 #endif
1130          exit(EXIT_OK);
1131       }
1132    }
1133    pstate |= PS_EXIT;
1134    NYD_LEAVE;
1135    return 0;
1136 }
1137
1138 /* Source the others in that case! */
1139 #ifdef HAVE_AMALGAMATION
1140 # include "config.h"
1141 #endif
1142
1143 /* s-it-mode */