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    /* STDOUT is always line buffered from our point of view */
 259    setvbuf(stdout, NULL, _IOLBF, 0);
 260
 261    /*  --  >8  --  8<  --  */
 262
 263 #ifndef HAVE_SETLOCALE
 264    mb_cur_max = 1;
 265 #else
 266    setlocale(LC_ALL, n_empty);
 267    mb_cur_max = MB_CUR_MAX;
 268 # ifdef HAVE_NL_LANGINFO
 269    if(ok_vlook(ttycharset) == NULL && (cp = nl_langinfo(CODESET)) != NULL)
 270       ok_vset(ttycharset, cp);
 271 # endif
 272
 273 # ifdef HAVE_C90AMEND1
 274    if(mb_cur_max > 1){
 275 #  ifdef HAVE_ALWAYS_UNICODE_LOCALE
 276       options |= OPT_UNICODE;
 277 #  else
 278       wchar_t wc;
 279       if(mbtowc(&wc, "\303\266", 2) == 2 && wc == 0xF6 &&
 280             mbtowc(&wc, "\342\202\254", 3) == 3 && wc == 0x20AC)
 281          options |= OPT_UNICODE;
 282       /* Reset possibly messed up state; luckily this also gives us an
 283        * indication whether the encoding has locking shift state sequences */
 284       if(mbtowc(&wc, NULL, mb_cur_max))
 285          options |= OPT_ENC_MBSTATE;
 286 #  endif
 287    }
 288 # endif
 289 #endif
 290
 291 #ifdef HAVE_ICONV
 292    iconvd = (iconv_t)-1;
 293 #endif
 294    NYD_LEAVE;
 295 }
 296
 297 static size_t
 298 _grow_cpp(char const ***cpp, size_t newsize, size_t oldcnt)
 299 {
 300    /* Just use auto-reclaimed storage, it will be preserved */
 301    char const **newcpp;
 302    NYD_ENTER;
 303
 304    newcpp = salloc(sizeof(char*) * newsize);
 305
 306    if (oldcnt > 0)
 307       memcpy(newcpp, *cpp, oldcnt * sizeof(char*));
 308    *cpp = newcpp;
 309    NYD_LEAVE;
 310    return newsize;
 311 }
 312
 313 static void
 314 _setup_vars(void){
 315    /* XXX furtherly check paths? */
 316    struct passwd *pwuid;
 317    char const *cp;
 318    NYD_ENTER;
 319
 320    group_id = getgid();
 321    if((pwuid = getpwuid(user_id = getuid())) == NULL)
 322       n_panic(_("Cannot associate a name with uid %lu"), (ul_i)user_id);
 323    myname = savestr(pwuid->pw_name); /* XXX replace uses with vlook(LOGNAME)! */
 324
 325    /* C99 */{
 326       char const *ep;
 327       bool_t doenv;
 328
 329       if(!(doenv = (ep = ok_vlook(LOGNAME)) == NULL) &&
 330             (doenv = strcmp(myname, ep)))
 331          n_err(_("Warning: $LOGNAME (%s) not identical to user (%s)!\n"),
 332             ep, myname);
 333       if(doenv){
 334          pstate |= PS_ROOT;
 335          ok_vset(LOGNAME, myname);
 336          pstate &= ~PS_ROOT;
 337       }
 338
 339       if((ep = ok_vlook(USER)) != NULL && strcmp(myname, ep)){
 340          n_err(_("Warning: $USER (%s) not identical to user (%s)!\n"),
 341             ep, myname);
 342          pstate |= PS_ROOT;
 343          ok_vset(USER, myname);
 344          pstate &= ~PS_ROOT;
 345       }
 346    }
 347
 348    /* XXX myfullname = pw->pw_gecos[OPTIONAL!] -> GUT THAT; TODO pw_shell */
 349
 350    /* */
 351    if((cp = ok_vlook(HOME)) == NULL){
 352       cp = pwuid->pw_dir;
 353       pstate |= PS_ROOT;
 354       ok_vset(HOME, cp);
 355       pstate &= ~PS_ROOT;
 356    }
 357
 358    /* Ensure some variables get loaded */
 359    (void)ok_blook(POSIXLY_CORRECT);
 360    (void)ok_vlook(TMPDIR);
 361    NYD_LEAVE;
 362 }
 363
 364 static void
 365 _setscreensize(int is_sighdl) /* TODO global policy; int wraps; minvals! */
 366 {
 367    struct termios tbuf;
 368 #ifdef TIOCGWINSZ
 369    struct winsize ws;
 370 #elif defined TIOCGSIZE
 371    struct ttysize ts;
 372 #endif
 373    NYD_ENTER;
 374
 375    scrnheight = realscreenheight = scrnwidth = 0;
 376
 377    /* (Also) POSIX: LINES and COLUMNS always override.  Adjust this
 378     * a little bit to be able to honour resizes during our lifetime and
 379     * only honour it upon first run; abuse *is_sighdl* as an indicator */
 380    if (!is_sighdl) {
 381       char *cp;
 382
 383       /* We manage those variables for our child processes, so ensure they
 384        * are up to date, always */
 385       if (options & OPT_INTERACTIVE)
 386          pstate |= PS_SIGWINCH_PEND;
 387
 388       if ((cp = ok_vlook(LINES)) != NULL)
 389          scrnheight = realscreenheight = (int)strtoul(cp, NULL, 0); /* TODO */
 390       if ((cp = ok_vlook(COLUMNS)) != NULL)
 391          scrnwidth = (int)strtoul(cp, NULL, 0); /* TODO posui32= not posnum=! */
 392
 393       if (scrnwidth != 0 && scrnheight != 0)
 394          goto jleave;
 395    }
 396
 397 #ifdef TIOCGWINSZ
 398    if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1)
 399       ws.ws_col = ws.ws_row = 0;
 400 #elif defined TIOCGSIZE
 401    if (ioctl(STDOUT_FILENO, TIOCGSIZE, &ws) == -1)
 402       ts.ts_lines = ts.ts_cols = 0;
 403 #endif
 404
 405    if (scrnheight == 0) {
 406       speed_t ospeed = ((tcgetattr(STDOUT_FILENO, &tbuf) == -1)
 407             ? B9600 : cfgetospeed(&tbuf));
 408
 409       if (ospeed < B1200)
 410          scrnheight = 9;
 411       else if (ospeed == B1200)
 412          scrnheight = 14;
 413 #ifdef TIOCGWINSZ
 414       else if (ws.ws_row != 0)
 415          scrnheight = ws.ws_row;
 416 #elif defined TIOCGSIZE
 417       else if (ts.ts_lines != 0)
 418          scrnheight = ts.ts_lines;
 419 #endif
 420       else
 421          scrnheight = 24;
 422
 423 #if defined TIOCGWINSZ || defined TIOCGSIZE
 424       if (0 ==
 425 # ifdef TIOCGWINSZ
 426             (realscreenheight = ws.ws_row)
 427 # else
 428             (realscreenheight = ts.ts_lines)
 429 # endif
 430       )
 431          realscreenheight = 24;
 432 #endif
 433    }
 434
 435    if (scrnwidth == 0 && 0 ==
 436 #ifdef TIOCGWINSZ
 437          (scrnwidth = ws.ws_col)
 438 #elif defined TIOCGSIZE
 439          (scrnwidth = ts.ts_cols)
 440 #endif
 441    )
 442       scrnwidth = 80;
 443
 444 jleave:
 445 #ifdef SIGWINCH
 446    if (is_sighdl) {
 447       pstate |= PS_SIGWINCH_PEND; /* XXX Not atomic */
 448       if (options & OPT_INTERACTIVE)
 449          n_tty_signal(SIGWINCH);
 450    }
 451 #endif
 452    NYD_LEAVE;
 453 }
 454
 455 static sigjmp_buf __hdrjmp; /* XXX */
 456
 457 static int
 458 _rcv_mode(char const *folder, char const *Larg)
 459 {
 460    int i;
 461    sighandler_type prevint;
 462    NYD_ENTER;
 463
 464    if (folder == NULL)
 465       folder = "%";
 466
 467    if (options & OPT_QUICKRUN_MASK)
 468       i = FEDIT_RDONLY;
 469    else
 470       i = FEDIT_NONE;
 471    i = setfile(folder, i);
 472    if (i < 0) {
 473       exit_status = EXIT_ERR; /* error already reported */
 474       goto jquit;
 475    }
 476    if (options & OPT_QUICKRUN_MASK) {
 477       exit_status = i;
 478       if (i == EXIT_OK && (!(options & OPT_EXISTONLY) ||
 479             (options & OPT_HEADERLIST)))
 480          print_header_summary(Larg);
 481       goto jquit;
 482    }
 483    check_folder_hook(FAL0);
 484
 485    if (i > 0 && !ok_blook(emptystart)) {
 486       exit_status = EXIT_ERR;
 487       goto jleave;
 488    }
 489
 490    if (sigsetjmp(__hdrjmp, 1) == 0) {
 491       if ((prevint = safe_signal(SIGINT, SIG_IGN)) != SIG_IGN)
 492          safe_signal(SIGINT, _hdrstop);
 493       if (!(options & OPT_N_FLAG)) {
 494          if (!ok_blook(quiet))
 495             printf(_("%s version %s.  Type `?' for help\n"),
 496                (ok_blook(bsdcompat) ? "Mail" : uagent), ok_vlook(version));
 497          announce(1);
 498          fflush(stdout);
 499       }
 500       safe_signal(SIGINT, prevint);
 501    }
 502
 503    /* Enter the command loop */
 504    if (options & OPT_INTERACTIVE)
 505       n_tty_init();
 506    n_commands();
 507    if (options & OPT_INTERACTIVE)
 508       n_tty_destroy();
 509
 510    if (mb.mb_type == MB_FILE || mb.mb_type == MB_MAILDIR) {
 511       safe_signal(SIGHUP, SIG_IGN);
 512       safe_signal(SIGINT, SIG_IGN);
 513       safe_signal(SIGQUIT, SIG_IGN);
 514    }
 515 jquit:
 516    save_mbox_for_possible_quitstuff();
 517    quit(FAL0);
 518 jleave:
 519    NYD_LEAVE;
 520    return exit_status;
 521 }
 522
 523 static void
 524 _hdrstop(int signo)
 525 {
 526    NYD_X; /* Signal handler */
 527    n_UNUSED(signo);
 528
 529    fflush(stdout);
 530    n_err_sighdl(_("\nInterrupt\n"));
 531    siglongjmp(__hdrjmp, 1);
 532 }
 533
 534 int
 535 main(int argc, char *argv[]){
 536    /* Keep in SYNC: ./nail.1:"SYNOPSIS, main() */
 537    static char const
 538       optstr[] = "A:a:Bb:c:dEeFfHhiL:M:m:NnO:q:Rr:S:s:tu:VvX:::~#.",
 539       usagestr[] = N_(
 540          "Synopsis:\n"
 541          "  %s -h\n"
 542
 543          "  %s [-BdEFintv~] [-: spec] [-A account]\n"
 544          "\t [-a attachment] [-b bcc-addr] [-c cc-addr]\n"
 545          "\t [-M type | -m file | -q file | -t]\n"
 546          "\t [-r from-addr] [-S var[=value]..]\n"
 547          "\t [-s subject] [-X cmd] [-.] to-addr.. [-- mta-option..]\n"
 548
 549          "  %s [-BdEeHiNnRv~] [-: spec] [-A account]\n"
 550          "\t [-L spec-list] [-r from-addr] [-S var[=value]..]\n"
 551          "\t [-u user] [-X cmd] [-- mta-option..]\n"
 552
 553          "  %s [-BdEeHiNnRv~#] [-: spec] [-A account] -f\n"
 554          "\t [-L spec-list] [-r from-addr] [-S var[=value]..]\n"
 555          "\t [-X cmd] [file] [-- mta-option..]\n"
 556       );
 557 #define _USAGE_ARGS , progname, progname, progname, progname
 558
 559    struct a_arg *a_head, *a_curr;
 560    struct name *to, *cc, *bcc;
 561    struct attachment *attach;
 562    char *cp, *subject, *qf, *Aarg, *Larg;
 563    char const *okey, **oargs, **Xargs, *folder, *emsg;
 564    size_t oargs_size, oargs_cnt, Xargs_size, Xargs_cnt, smopts_size;
 565    enum{
 566       a_RF_NONE = 0,
 567       a_RF_SET = 1<<0,
 568       a_RF_SYSTEM = 1<<1,
 569       a_RF_USER = 1<<2,
 570       a_RF_ALL = a_RF_SYSTEM | a_RF_USER
 571    } resfiles;
 572    int i;
 573    NYD_ENTER;
 574
 575    a_head = NULL;
 576    n_UNINIT(a_curr, NULL);
 577    to = cc = bcc = NULL;
 578    attach = NULL;
 579    subject = qf =
 580          Aarg = Larg = NULL;
 581    oargs = Xargs = NULL;
 582    folder = emsg = NULL;
 583    oargs_size = oargs_cnt = Xargs_size = Xargs_cnt = smopts_size = 0;
 584    resfiles = a_RF_ALL;
 585
 586    /*
 587     * Start our lengthy setup, finalize by setting PS_STARTED
 588     */
 589
 590    progname = argv[0];
 591    _startup();
 592
 593    /* Command line parsing
 594     * Variable settings need to be done twice, since the user surely wants the
 595     * setting to take effect immediately, but also doesn't want it to be
 596     * overwritten from within resource files */
 597    while ((i = _getopt(argc, argv, optstr)) >= 0) {
 598       switch (i) {
 599       case 'A':
 600          /* Execute an account command later on */
 601          Aarg = _oarg;
 602          break;
 603       case 'a':
 604          options |= OPT_SENDMODE;
 605          {  struct a_arg *nap = salloc(sizeof(struct a_arg));
 606             if (a_head == NULL)
 607                a_head = nap;
 608             else
 609                a_curr->aa_next = nap;
 610             nap->aa_next = NULL;
 611             nap->aa_file = _oarg;
 612             a_curr = nap;
 613          }
 614          break;
 615       case 'B':
 616          OBSOLETE(_("-B is obsolete, please use -# as necessary"));
 617          break;
 618       case 'b':
 619          /* Get Blind Carbon Copy Recipient list */
 620          options |= OPT_SENDMODE;
 621          bcc = cat(bcc, lextract(_oarg, GBCC | GFULL));
 622          break;
 623       case 'c':
 624          /* Get Carbon Copy Recipient list */
 625          options |= OPT_SENDMODE;
 626          cc = cat(cc, lextract(_oarg, GCC | GFULL));
 627          break;
 628       case 'd':
 629          ok_bset(debug);
 630          okey = "debug";
 631          goto joarg;
 632       case 'E':
 633          OBSOLETE(_("-E will be removed, please use \"-Sskipemptybody\""));
 634          ok_bset(skipemptybody);
 635          okey = "skipemptybody";
 636          goto joarg;
 637       case 'e':
 638          options |= OPT_EXISTONLY;
 639          break;
 640       case 'F':
 641          options |= OPT_F_FLAG | OPT_SENDMODE;
 642          break;
 643       case 'f':
 644          /* User is specifying file to "edit" with Mail, as opposed to reading
 645           * system mailbox.  If no argument is given, we read his mbox file.
 646           * Check for remaining arguments later */
 647          folder = "&";
 648          break;
 649       case 'H':
 650          options |= OPT_HEADERSONLY;
 651          break;
 652       case 'h':
 653          n_err(V_(usagestr) _USAGE_ARGS);
 654          goto j_leave;
 655       case 'i':
 656          /* Ignore interrupts */
 657          ok_bset(ignore);
 658          okey = "ignore";
 659          goto joarg;
 660       case 'L':
 661          Larg = _oarg;
 662          options |= OPT_HEADERLIST;
 663          if (*Larg == '"' || *Larg == '\'') { /* TODO list.c:listspec_check() */
 664             size_t j = strlen(++Larg);
 665             if (j > 0)
 666                Larg[j - 1] = '\0';
 667          }
 668          break;
 669       case 'M':
 670          if(qf != NULL && (!(options & OPT_Mm_FLAG) || qf != (char*)-1))
 671             goto jeMmq;
 672          option_Mm_arg = _oarg;
 673          qf = (char*)-1;
 674          if(0){
 675             /* FALLTHRU*/
 676       case 'm':
 677             if(qf != NULL && (!(options & OPT_Mm_FLAG) || qf == (char*)-1))
 678                goto jeMmq;
 679             qf = _oarg;
 680          }
 681          options |= OPT_SENDMODE | OPT_Mm_FLAG;
 682          break;
 683       case 'N':
 684          /* Avoid initial header printing */
 685          ok_bclear(header);
 686          okey = "noheader";
 687          goto joarg;
 688       case 'n':
 689          /* Don't source "unspecified system start-up file" */
 690          if(resfiles & a_RF_SET){
 691             emsg = N_("-n cannot be used in conjunction with -:");
 692             goto jusage;
 693          }
 694          resfiles = a_RF_USER;
 695          break;
 696       case 'O':
 697          /* Additional options to pass-through to MTA TODO v15-compat legacy */
 698          if (smopts_cnt == smopts_size)
 699             smopts_size = _grow_cpp(&smopts, smopts_size + 8, smopts_cnt);
 700          smopts[smopts_cnt++] = _oarg;
 701          break;
 702       case 'q':
 703          if (qf != NULL && (options & OPT_Mm_FLAG)) {
 704 jeMmq:
 705             emsg = N_("Only one of -M, -m or -q may be given");
 706             goto jusage;
 707          }
 708          /* Quote file TODO drop? -Q with real quote?? what ? */
 709          options |= OPT_SENDMODE;
 710          /* Allow for now, we have to special check validity of -q- later on! */
 711          qf = (_oarg[0] == '-' && _oarg[1] == '\0') ? (char*)-1 : _oarg;
 712          break;
 713       case 'R':
 714          /* Open folders read-only */
 715          options |= OPT_R_FLAG;
 716          break;
 717       case 'r':
 718          /* Set From address. */
 719          options |= OPT_r_FLAG;
 720          if (_oarg[0] != '\0') {
 721             struct name *fa = nalloc(_oarg, GSKIN | GFULL | GFULLEXTRA);
 722
 723             if (is_addr_invalid(fa, EACM_STRICT | EACM_NOLOG)) {
 724                emsg = N_("Invalid address argument with -r");
 725                goto jusage;
 726             }
 727             option_r_arg = fa;
 728             /* TODO -r options is set in smopts, but may
 729              * TODO be overwritten by setting from= in
 730              * TODO an interactive session!
 731              * TODO Maybe disable setting of from?
 732              * TODO Warn user?  Update manual!! */
 733             okey = savecat("from=", fa->n_fullname);
 734             goto joarg;
 735          }
 736          break;
 737       case 'S':
 738          /* Set variable (TODO twice [only if successful]) */
 739          {  char *a[2];
 740             bool_t b;
 741
 742             okey = a[0] = _oarg;
 743             a[1] = NULL;
 744             pstate |= PS_ROBOT;
 745             b = (c_set(a) == 0);
 746             pstate &= ~PS_ROBOT;
 747             if(!b)
 748                break;
 749          }
 750 joarg:
 751          if (oargs_cnt == oargs_size)
 752             oargs_size = _grow_cpp(&oargs, oargs_size + 8, oargs_cnt);
 753          oargs[oargs_cnt++] = okey;
 754          break;
 755       case 's':
 756          /* Subject:; take care for Debian #419840 and strip any \r and \n */
 757          if(n_anyof_cp("\n\r", subject = _oarg)){
 758             n_err(_("-s: normalizing away invalid ASCII NL / CR bytes\n"));
 759             for(cp = subject = savestr(_oarg); *cp != '\0'; ++cp)
 760                if(*cp == '\n' || *cp == '\r')
 761                   *cp = ' ';
 762          }
 763          options |= OPT_SENDMODE;
 764          break;
 765       case 't':
 766          /* Read defined set of headers from mail to be sent */
 767          options |= OPT_SENDMODE | OPT_t_FLAG;
 768          break;
 769       case 'u':
 770          /* Temporarily set myname so that we can recognize the -u condition */
 771          myname = savecat("%", _oarg);
 772          break;
 773       case 'V':
 774          printf(_("%s version %s\n"), uagent, ok_vlook(version));
 775          exit_status = EXIT_OK;
 776          goto j_leave;
 777       case 'v':
 778          /* Be verbose */
 779          ok_bset(verbose);
 780          okey = "verbose";
 781          goto joarg;
 782       case 'X':
 783          /* Add to list of commands to exec before entering normal operation */
 784          if (Xargs_cnt == Xargs_size)
 785             Xargs_size = _grow_cpp(&Xargs, Xargs_size + 8, Xargs_cnt);
 786          Xargs[Xargs_cnt++] = _oarg;
 787          break;
 788       case ':':
 789          /* Control which resource files shall be loaded */
 790          if(!(resfiles & (a_RF_SET | a_RF_SYSTEM))){
 791             emsg = N_("-n cannot be used in conjunction with -:");
 792             goto jusage;
 793          }
 794          resfiles = a_RF_SET;
 795          while((i = *_oarg++) != '\0')
 796             switch(i){
 797             case 'S': case 's': resfiles |= a_RF_SYSTEM; break;
 798             case 'U': case 'u': resfiles |= a_RF_USER; break;
 799             case ':': case '/': resfiles &= ~a_RF_ALL; break;
 800             default:
 801                emsg = N_("Invalid argument of -:");
 802                goto jusage;
 803             }
 804          break;
 805       case '~':
 806          /* Enable command escapes even in non-interactive mode */
 807          options |= OPT_TILDE_FLAG;
 808          break;
 809       case '#':
 810          /* Work in batch mode, even if non-interactive */
 811          if(!(options & OPT_INTERACTIVE))
 812             setvbuf(stdin, NULL, _IOLBF, 0);
 813          options |= OPT_TILDE_FLAG | OPT_BATCH_FLAG;
 814          if (oargs_cnt + 8 >= oargs_size)
 815             oargs_size = _grow_cpp(&oargs, oargs_size + 9, oargs_cnt);
 816          folder = "/dev/null";
 817          ok_vset(MAIL, folder);
 818          ok_vset(MBOX, folder);
 819          ok_bset(emptystart);
 820          ok_bclear(header);
 821          ok_vset(inbox, folder);
 822          ok_bset(quiet);
 823          ok_bset(sendwait);
 824          ok_bset(typescript_mode);
 825          oargs[oargs_cnt + 0] = "MAIL=/dev/null";
 826          oargs[oargs_cnt + 1] = "MBOX=/dev/null";
 827          oargs[oargs_cnt + 2] = "emptystart";
 828          oargs[oargs_cnt + 3] = "noheader";
 829          oargs[oargs_cnt + 4] = "inbox=/dev/null";
 830          oargs[oargs_cnt + 5] = "quiet";
 831          oargs[oargs_cnt + 6] = "sendwait";
 832          oargs[oargs_cnt + 7] = "typescript-mode";
 833          oargs_cnt += 8;
 834          break;
 835       case '.':
 836          options |= OPT_SENDMODE;
 837          goto jgetopt_done;
 838       case '?':
 839 jusage:
 840          if (emsg != NULL)
 841             n_err("%s\n", V_(emsg));
 842          n_err(V_(usagestr) _USAGE_ARGS);
 843 #undef _USAGE_ARGS
 844          exit_status = EXIT_USE;
 845          goto j_leave;
 846       }
 847    }
 848 jgetopt_done:
 849    ;
 850
 851    /* The normal arguments may be followed by MTA arguments after a "--";
 852     * however, -f may take off an argument, too, and before that.
 853     * Since MTA arguments after "--" require *expandargv*, delay parsing off
 854     * those options until after the resource files are loaded... */
 855    if ((cp = argv[i = _oind]) == NULL)
 856       ;
 857    else if (cp[0] == '-' && cp[1] == '-' && cp[2] == '\0')
 858       ++i;
 859    /* OPT_BATCH_FLAG sets to /dev/null, but -f can still be used and sets & */
 860    else if (folder != NULL && /*folder[0] == '&' &&*/ folder[1] == '\0') {
 861       folder = cp;
 862       if ((cp = argv[++i]) != NULL) {
 863          if (cp[0] != '-' || cp[1] != '-' || cp[2] != '\0') {
 864             emsg = N_("More than one file given with -f");
 865             goto jusage;
 866          }
 867          ++i;
 868       }
 869    } else {
 870       options |= OPT_SENDMODE;
 871       for (;;) {
 872          to = cat(to, lextract(cp, GTO | GFULL));
 873          if ((cp = argv[++i]) == NULL)
 874             break;
 875          if (cp[0] == '-' && cp[1] == '-' && cp[2] == '\0') {
 876             ++i;
 877             break;
 878          }
 879       }
 880    }
 881    _oind = i;
 882
 883    /* ...BUT, since we use salloc() for the MTA smopts storage we need to
 884     * allocate the necessary space for them before we fixate that storage! */
 885    while (argv[i] != NULL)
 886       ++i;
 887    if (smopts_cnt + i > smopts_size)
 888       DBG(smopts_size =) _grow_cpp(&smopts, smopts_cnt + i + 1, smopts_cnt);
 889
 890    /* Check for inconsistent arguments, fix some temporaries */
 891    if (options & OPT_SENDMODE) {
 892       /* XXX This is only because BATCH_FLAG sets *folder*=/dev/null
 893        * XXX in order to function.  Ideally that would not be needed */
 894       if (folder != NULL && !(options & OPT_BATCH_FLAG)) {
 895          emsg = N_("Cannot give -f and people to send to.");
 896          goto jusage;
 897       }
 898       if (myname != NULL) {
 899          emsg = N_("The -u option cannot be used in send mode");
 900          goto jusage;
 901       }
 902       if (!(options & OPT_t_FLAG) && to == NULL) {
 903          emsg = N_("Send options without primary recipient specified.");
 904          goto jusage;
 905       }
 906       if ((options & OPT_t_FLAG) && qf != NULL) {
 907          emsg = N_("The -M, -m, -q and -t options are mutual exclusive.");
 908          goto jusage;
 909       }
 910       if (options & (OPT_EXISTONLY | OPT_HEADERSONLY | OPT_HEADERLIST)) {
 911          emsg = N_("The -e, -H and -L options cannot be used in send mode.");
 912          goto jusage;
 913       }
 914       if (options & OPT_R_FLAG) {
 915          emsg = N_("The -R option is meaningless in send mode.");
 916          goto jusage;
 917       }
 918
 919       if (options & OPT_INTERACTIVE) {
 920          if (qf == (char*)-1) {
 921             if (!(options & OPT_Mm_FLAG))
 922                emsg = N_("-q can't use standard input when interactive.\n");
 923             goto jusage;
 924          }
 925       }
 926    } else {
 927       if (myname != NULL && folder != NULL) {
 928          emsg = N_("The options -u and -f (and -#) are mutually exclusive");
 929          goto jusage;
 930       }
 931       if ((options & (OPT_EXISTONLY | OPT_HEADERSONLY)) ==
 932             (OPT_EXISTONLY | OPT_HEADERSONLY)) {
 933          emsg = N_("The options -e and -H are mutual exclusive");
 934          goto jusage;
 935       }
 936       if ((options & (OPT_HEADERSONLY | OPT_HEADERLIST)) == /* TODO OBSOLETE */
 937             (OPT_HEADERSONLY | OPT_HEADERLIST))
 938          OBSOLETE(_("please use \"-e -L xy\" instead of \"-H -L xy\""));
 939
 940       if(myname != NULL)
 941          folder = myname;
 942    }
 943
 944    /*
 945     * Likely to go, perform more setup
 946     */
 947
 948    _setup_vars();
 949
 950    if (options & OPT_INTERACTIVE) {
 951       _setscreensize(0);
 952 #ifdef SIGWINCH
 953 # ifndef TTY_WANTS_SIGWINCH
 954       if (safe_signal(SIGWINCH, SIG_IGN) != SIG_IGN)
 955 # endif
 956          safe_signal(SIGWINCH, &_setscreensize);
 957 #endif
 958    } else
 959       scrnheight = realscreenheight = 24, scrnwidth = 80;
 960
 961    /* Fixate the current snapshot of our global auto-reclaimed storage instance.
 962     * Memory is auto-reclaimed from now on */
 963    n_memory_autorec_fixate();
 964
 965    /* load() any resource files */
 966    if(resfiles & a_RF_ALL){
 967       /* *expand() returns a savestr(), but load only uses the file name for
 968        * fopen(), so it's safe to do this */
 969       if((resfiles & a_RF_SYSTEM) && !ok_blook(NAIL_NO_SYSTEM_RC))
 970          n_load(VAL_SYSCONFDIR "/" VAL_SYSCONFRC);
 971       if(resfiles & a_RF_USER)
 972          n_load(fexpand(ok_vlook(MAILRC), FEXP_LOCAL | FEXP_NOPROTO));
 973       if((cp = ok_vlook(NAIL_EXTRA_RC)) != NULL)
 974          n_load(fexpand(cp, FEXP_LOCAL | FEXP_NOPROTO));
 975    }
 976
 977    /* Ensure the -S and other command line options take precedence over
 978     * anything that may have been placed in resource files.
 979     * Our "ternary binary" option *verbose* needs special treament */
 980    if ((options & (OPT_VERB | OPT_VERBVERB)) == OPT_VERB)
 981       options &= ~OPT_VERB;
 982    /* ..and be silent when unsetting an undefined variable */
 983    pstate |= PS_ROBOT;
 984    for (i = 0; UICMP(z, i, <, oargs_cnt); ++i) {
 985       char const *a[2];
 986
 987       a[0] = oargs[i];
 988       a[1] = NULL;
 989       c_set(a);
 990    }
 991    pstate &= ~PS_ROBOT;
 992
 993    /* Cause possible umask(2), now that any setting is established, and before
 994     * we change accounts, evaluate commands etc. */
 995    (void)ok_vlook(umask);
 996
 997    /* Additional options to pass-through to MTA, and allowed to do so? */
 998    if ((cp = ok_vlook(expandargv)) != NULL) {
 999       bool_t isfail = !asccasecmp(cp, "fail"),
1000          isrestrict = (!isfail && !asccasecmp(cp, "restrict"));
1001
1002       if ((options & OPT_D_V) && !isfail && !isrestrict && *cp != '\0')
1003          n_err(_("Unknown *expandargv* value: %s\n"), cp);
1004
1005       if ((cp = argv[i = _oind]) != NULL) {
1006          if (isfail ||
1007                (isrestrict && !(options & (OPT_INTERACTIVE |OPT_TILDE_FLAG)))) {
1008             n_err(_("*expandargv* doesn't allow MTA arguments; consider "
1009                "using *sendmail-arguments*\n"));
1010             exit_status = EXIT_USE | EXIT_SEND_ERROR;
1011             goto jleave;
1012          }
1013          do {
1014             assert(smopts_cnt + 1 <= smopts_size);
1015             smopts[smopts_cnt++] = cp;
1016          } while ((cp = argv[++i]) != NULL);
1017       }
1018    }
1019
1020    /* We had to wait until the resource files are loaded and any command line
1021     * setting has been restored, but get the termcap up and going before we
1022     * switch account or running commands */
1023 #ifdef n_HAVE_TCAP
1024    if((options & (OPT_INTERACTIVE | OPT_QUICKRUN_MASK)) == OPT_INTERACTIVE)
1025       n_termcap_init();
1026 #endif
1027
1028    /* Now we can set the account */
1029    if (Aarg != NULL) {
1030       char const *a[2];
1031       a[0] = Aarg;
1032       a[1] = NULL;
1033       c_account(a);
1034    }
1035
1036    /* "load()" commands given on command line */
1037    if(Xargs_cnt > 0)
1038       n_load_Xargs(Xargs, Xargs_cnt);
1039
1040    /* Final tests */
1041    if(options & OPT_Mm_FLAG){
1042       if(qf == (char*)-1){
1043          if(!mime_type_check_mtname(option_Mm_arg)){
1044             n_err(_("Could not find `mimetype' for -M argument: %s\n"),
1045                option_Mm_arg);
1046             exit_status = EXIT_ERR;
1047             goto jleave;
1048          }
1049       }else if((option_Mm_arg = mime_type_classify_filename(qf)) == NULL){
1050          n_err(_("Could not `mimetype'-classify -m argument: %s\n"),
1051             n_shexp_quote_cp(qf, FAL0));
1052          exit_status = EXIT_ERR;
1053          goto jleave;
1054       }else if(!asccasecmp(option_Mm_arg, "text/plain")) /* TODO no: magic!! */
1055          option_Mm_arg = NULL;
1056    }
1057
1058    /*
1059     * We're finally completely setup and ready to go
1060     */
1061    pstate |= PS_STARTED;
1062
1063    if (!(options & OPT_SENDMODE)) {
1064       exit_status = _rcv_mode(folder, Larg);
1065       goto jleave;
1066    }
1067
1068    /* Now that full mailx(1)-style file expansion is possible handle the
1069     * attachments which we had delayed due to this.
1070     * This may use savestr(), but since we won't enter the command loop we
1071     * don't need to care about that */
1072    for (cp = NULL; a_head != NULL;) {
1073       struct attachment *nahp, *nap;
1074
1075       if ((nahp = add_attachment(n_LEXINPUT_CTX_DEFAULT, attach,
1076             a_head->aa_file, &nap)) != NULL) {
1077          attach = nahp;
1078          /* Did we split a charset set name for fixation purposes? */
1079          if (cp != NULL) {
1080             nap->a_conv = AC_FIX_INCS;
1081             nap->a_input_charset = cp;
1082             cp = NULL;
1083          }
1084          a_head = a_head->aa_next;
1085          continue;
1086       }
1087       i = errno;
1088
1089       /* It may not have worked because of an appended character set name, so
1090        * try to split name and charset and retry once */
1091       if (cp == NULL && (cp = strrchr(a_head->aa_file, '=')) != NULL) {
1092          char *ncp, *nfp = savestrbuf(a_head->aa_file,
1093                PTR2SIZE(cp - a_head->aa_file));
1094
1095          for (ncp = ++cp; *ncp != '\0'; ++ncp)
1096             if (!alnumchar(*ncp) && !punctchar(*ncp))
1097                break;
1098          if (*ncp == '\0') {
1099             a_head->aa_file = nfp;
1100             continue;
1101          }
1102       }
1103
1104       n_perr(a_head->aa_file, i);
1105       exit_status = EXIT_ERR;
1106       goto jleave;
1107    }
1108
1109    if (options & OPT_INTERACTIVE)
1110       n_tty_init();
1111    mail(to, cc, bcc, subject, attach, qf, ((options & OPT_F_FLAG) != 0));
1112    if (options & OPT_INTERACTIVE)
1113       n_tty_destroy();
1114
1115 jleave:
1116 #ifdef n_HAVE_TCAP
1117    if((options & (OPT_INTERACTIVE | OPT_QUICKRUN_MASK)) == OPT_INTERACTIVE)
1118       n_termcap_destroy();
1119 #endif
1120 j_leave:
1121 #ifdef HAVE_MEMORY_DEBUG
1122    n_memory_autorec_pop(NULL);
1123 #endif
1124    n_memory_reset();
1125    NYD_LEAVE;
1126    return exit_status;
1127 }
1128
1129 FL int
1130 c_exit(void *v){/* TODO program state machine */
1131    NYD_ENTER;
1132    n_UNUSED(v);
1133
1134    if(pstate & PS_STARTED){
1135       if(!(pstate & PS_SOURCING)){
1136 #ifdef n_HAVE_TCAP
1137          if((options & (OPT_INTERACTIVE | OPT_QUICKRUN_MASK)) ==
1138                OPT_INTERACTIVE)
1139             n_termcap_destroy();
1140 #endif
1141          exit(EXIT_OK);
1142       }
1143    }
1144    pstate |= PS_EXIT;
1145    NYD_LEAVE;
1146    return 0;
1147 }
1148
1149 /* Source the others in that case! */
1150 #ifdef HAVE_AMALGAMATION
1151 # include "config.h"
1152 #endif
1153
1154 /* s-it-mode */