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 - 2015 Steffen (Daode) Nurpmeso <sdaoden@users.sf.net>.
   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 struct X_arg {
  59    struct X_arg   *xa_next;
  60    size_t         xa_cmd_len;
  61    char           xa_cmd_buf[VFIELD_SIZE(sizeof(size_t))];
  62 };
  63
  64 /* (extern, but not with amalgamation, so define here) */
  65 VL char const        weekday_names[7 + 1][4] = {
  66    "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", ""
  67 };
  68 VL char const        month_names[12 + 1][4] = {
  69    "Jan", "Feb", "Mar", "Apr", "May", "Jun",
  70    "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", ""
  71 };
  72 VL char const        uagent[sizeof UAGENT] = UAGENT;
  73 VL uc_i const        class_char[1 + 0x7F] = {
  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, C_BLANK, C_WHITE, C_SPACE, C_SPACE, C_SPACE, 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 /* 040 sp   041  !   042  "   043  #   044  $   045  %   046  &   047  ' */
  83    C_BLANK, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT,
  84 /* 050  (   051  )   052  *   053  +   054  ,    055  -   056  .   057  / */
  85    C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT,
  86 /* 060  0   061  1   062  2   063  3   064  4   065  5   066  6   067  7 */
  87    C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL,
  88 /* 070  8   071  9   072  :   073  ;   074  <   075  =   076  >   077  ? */
  89    C_DIGIT, C_DIGIT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT,
  90 /* 100  @   101  A   102  B   103  C   104  D   105  E   106  F   107  G */
  91    C_PUNCT, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER,
  92 /* 110  H   111  I   112  J   113  K   114  L   115  M   116  N   117  O */
  93    C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER,
  94 /* 120  P   121  Q   122  R   123  S   124  T   125  U   126  V   127  W */
  95    C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER,
  96 /* 130  X   131  Y   132  Z   133  [   134  \   135  ]   136  ^   137  _ */
  97    C_UPPER, C_UPPER, C_UPPER, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT,
  98 /* 140  `   141  a   142  b   143  c   144  d   145  e   146  f   147  g */
  99    C_PUNCT, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER,
 100 /* 150  h   151  i   152  j   153  k   154  l   155  m   156  n   157  o */
 101    C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER,
 102 /* 160  p   161  q   162  r   163  s   164  t   165  u   166  v   167  w */
 103    C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER,
 104 /* 170  x   171  y   172  z   173  {   174  |   175  }   176  ~   177 del */
 105    C_LOWER, C_LOWER, C_LOWER, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_CNTRL
 106 };
 107
 108 /* Our own little getopt(3) */
 109 static char          *_oarg;
 110 static int           _oind, /*_oerr,*/ _oopt;
 111
 112 /* Our own little getopt(3); note --help is special-treated as 'h' */
 113 static int     _getopt(int argc, char * const argv[], char const *optstring);
 114
 115 /* Perform basic startup initialization */
 116 static void    _startup(void);
 117
 118 /* Grow a char** */
 119 static size_t  _grow_cpp(char const ***cpp, size_t newsize, size_t oldcnt);
 120
 121 /* Initialize *tempdir*, *myname*, *homedir* */
 122 static void    _setup_vars(void);
 123
 124 /* We're in an interactive session - compute what the screen size for printing
 125  * headers etc. should be; notify tty upon resize if *is_sighdl* is not 0.
 126  * We use the following algorithm for the height:
 127  * If baud rate < 1200, use  9
 128  * If baud rate = 1200, use 14
 129  * If baud rate > 1200, use 24 or ws_row
 130  * Width is either 80 or ws_col */
 131 static void    _setscreensize(int is_sighdl);
 132
 133 /* Ok, we are reading mail.  Decide whether we are editing a mailbox or reading
 134  * the system mailbox, and open up the right stuff */
 135 static int     _rcv_mode(char const *folder, char const *Larg,
 136                   struct X_arg *xhp);
 137
 138 /* Interrupt printing of the headers */
 139 static void    _hdrstop(int signo);
 140
 141 /* -X arg given at least once, evaluate the list in order */
 142 static bool_t  _X_arg_eval(struct X_arg *xhp);
 143
 144 static int
 145 _getopt(int argc, char * const argv[], char const *optstring)
 146 {
 147    static char const *lastp;
 148
 149    int rv = -1, colon;
 150    char const *curp;
 151    NYD_ENTER;
 152
 153    _oarg = NULL;
 154
 155    if ((colon = (optstring[0] == ':')))
 156       ++optstring;
 157    if (lastp != NULL) {
 158       curp = lastp;
 159       lastp = 0;
 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    _oopt = curp[0];
 172    while (optstring[0] != '\0') {
 173       if (optstring[0] == ':' || optstring[0] != _oopt) {
 174          ++optstring;
 175          continue;
 176       }
 177       if (optstring[1] == ':') {
 178          if (curp[1] != '\0') {
 179             _oarg = 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 = 0;
 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    /* Define defaults for internal variables, based on POSIX 2008/Cor 1-2013 */
 261    /* (Keep in sync:
 262     * ./main.c:_startup(), ./nail.rc, ./nail.1:"Initial settings") */
 263    /* noallnet */
 264    /* noappend */
 265    ok_bset(asksub, TRU1);
 266    /* noaskbcc */
 267    /* noaskcc */
 268    /* noautoprint */
 269    /* nobang */
 270    /* nocmd */
 271    /* nocrt */
 272    /* nodebug */
 273    /* nodot */
 274    /* ok_vset(escape, ESCAPE *"~"*); TODO non-compliant */
 275    /* noflipr */
 276    /* nofolder */
 277    ok_bset(header, TRU1);
 278    /* nohold */
 279    /* noignore */
 280    /* noignoreeof */
 281    /* nokeep */
 282    /* nokeepsave */
 283    /* nometoo */
 284    /* noonehop -- Note: we ignore this one */
 285    /* nooutfolder */
 286    /* nopage */
 287    ok_vset(prompt, "\\& "); /* POSIX "? " unless *bsdcompat*, then "& " */
 288    /* noquiet */
 289    /* norecord */
 290    ok_bset(save, TRU1);
 291    /* nosendwait */
 292    /* noshowto */
 293    /* nosign */
 294    /* noSign */
 295    /* ok_vset(toplines, "5"); XXX somewhat hmm */
 296
 297    /* TODO until we have an automatic mechanism for that, set some more
 298     * TODO variables so that users see the internal fallback settings
 299     * TODO (something like "defval=X,notempty=1") */
 300    do {
 301       char const *vp;
 302
 303       vp = env_vlook("SHELL", TRU1);
 304       ok_vset(SHELL, (vp != NULL ? vp : XSHELL));
 305
 306       vp = env_vlook("LISTER", TRU1);
 307       ok_vset(LISTER, (vp != NULL ? vp : XLISTER));
 308
 309       vp = env_vlook("PAGER", TRU1);
 310       ok_vset(PAGER, (vp != NULL ? vp : XPAGER));
 311
 312       ok_vset(sendmail, SENDMAIL);
 313       ok_vset(sendmail_progname, SENDMAIL_PROGNAME);
 314    } while (0);
 315
 316    /*  --  >8  --  8<  --  */
 317
 318 #ifdef HAVE_SETLOCALE
 319    setlocale(LC_ALL, "");
 320    mb_cur_max = MB_CUR_MAX;
 321 # ifdef HAVE_NL_LANGINFO
 322    if (ok_vlook(ttycharset) == NULL && (cp = nl_langinfo(CODESET)) != NULL)
 323       ok_vset(ttycharset, cp);
 324 # endif
 325
 326 # ifdef HAVE_C90AMEND1
 327    if (mb_cur_max > 1) {
 328       wchar_t  wc;
 329       if (mbtowc(&wc, "\303\266", 2) == 2 && wc == 0xF6 &&
 330             mbtowc(&wc, "\342\202\254", 3) == 3 && wc == 0x20AC)
 331          options |= OPT_UNICODE;
 332       /* Reset possibly messed up state; luckily this also gives us an
 333        * indication wether the encoding has locking shift state sequences */
 334       /* TODO temporary - use option bits! */
 335       if (mbtowc(&wc, NULL, mb_cur_max))
 336          options |= OPT_ENC_MBSTATE;
 337    }
 338 # endif
 339 #else
 340    mb_cur_max = 1;
 341 #endif
 342
 343 #ifdef HAVE_ICONV
 344    iconvd = (iconv_t)-1;
 345 #endif
 346    NYD_LEAVE;
 347 }
 348
 349 static size_t
 350 _grow_cpp(char const ***cpp, size_t newsize, size_t oldcnt)
 351 {
 352    /* Before spreserve(): use our string pool instead of LibC heap */
 353    char const **newcpp;
 354    NYD_ENTER;
 355
 356    newcpp = salloc(sizeof(char*) * newsize);
 357
 358    if (oldcnt > 0)
 359       memcpy(newcpp, *cpp, oldcnt * sizeof(char*));
 360    *cpp = newcpp;
 361    NYD_LEAVE;
 362    return newsize;
 363 }
 364
 365 static void
 366 _setup_vars(void)
 367 {
 368    /* Before spreserve(): use our string pool instead of LibC heap */
 369    /* XXX further check paths? */
 370    char const *cp;
 371    uid_t uid;
 372    struct passwd *pwuid, *pw;
 373    NYD_ENTER;
 374
 375    /* Verify and fixate user identification */
 376    if (myname != NULL)
 377       cp = myname;
 378    else if ((cp = env_vlook("LOGNAME", TRU1)) == NULL)
 379       cp = env_vlook("USER", TRU1);
 380
 381    group_id = getgid();
 382    user_id = uid = getuid();
 383    if ((pwuid = getpwuid(uid)) == NULL)
 384       n_panic(_("Cannot associate a name with uid %u"), user_id);
 385
 386    if (cp == NULL || *cp == '\0')
 387       myname = pwuid->pw_name;
 388    else if ((pw = getpwnam(cp)) == NULL) {
 389       n_alert(_("\"%s\" is not a user of this system"), cp);
 390       exit(EXIT_NOUSER);
 391    } else {
 392       myname = pw->pw_name;
 393       if (pw->pw_uid != uid)
 394          options |= OPT_u_FLAG;
 395    }
 396    myname = savestr(myname);
 397    /* XXX myfullname = pw->pw_gecos[OPTIONAL!] -> GUT THAT; TODO pw_shell */
 398
 399    /* */
 400    if ((cp = env_vlook("HOME", TRU1)) == NULL)
 401       cp = "."; /* XXX User and Login objects; Login: pw->pw_dir */
 402    homedir = savestr(cp);
 403
 404    tempdir = ((cp = env_vlook("TMPDIR", TRU1)) != NULL)
 405          ? savestr(cp) : TMPDIR_FALLBACK;
 406    NYD_LEAVE;
 407 }
 408
 409 static void
 410 _setscreensize(int is_sighdl) /* TODO global policy; int wraps; minvals! */
 411 {
 412    struct termios tbuf;
 413 #ifdef TIOCGWINSZ
 414    struct winsize ws;
 415 #elif defined TIOCGSIZE
 416    struct ttysize ts;
 417 #endif
 418    NYD_ENTER;
 419
 420    scrnheight = realscreenheight = scrnwidth = 0;
 421
 422    /* (Also) POSIX: LINES and COLUMNS always override.  Adjust this
 423     * a little bit to be able to honour resizes during our lifetime and
 424     * only honour it upon first run; abuse *is_sighdl* as an indicator */
 425    if (!is_sighdl) {
 426       char *cp;
 427       long i;
 428
 429       if ((cp = env_vlook("LINES", FAL0)) != NULL &&
 430             (i = strtol(cp, NULL, 10)) > 0 && i < INT_MAX)
 431          scrnheight = realscreenheight = (int)i;
 432       if ((cp = env_vlook("COLUMNS", FAL0)) != NULL &&
 433             (i = strtol(cp, NULL, 10)) > 0 && i < INT_MAX)
 434          scrnwidth = (int)i;
 435
 436       if (scrnwidth != 0 && scrnheight != 0)
 437          goto jleave;
 438    }
 439
 440 #ifdef TIOCGWINSZ
 441    if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1)
 442       ws.ws_col = ws.ws_row = 0;
 443 #elif defined TIOCGSIZE
 444    if (ioctl(STDOUT_FILENO, TIOCGSIZE, &ws) == -1)
 445       ts.ts_lines = ts.ts_cols = 0;
 446 #endif
 447
 448    if (scrnheight == 0) {
 449       speed_t ospeed = ((tcgetattr(STDOUT_FILENO, &tbuf) == -1)
 450             ? B9600 : cfgetospeed(&tbuf));
 451
 452       if (ospeed < B1200)
 453          scrnheight = 9;
 454       else if (ospeed == B1200)
 455          scrnheight = 14;
 456 #ifdef TIOCGWINSZ
 457       else if (ws.ws_row != 0)
 458          scrnheight = ws.ws_row;
 459 #elif defined TIOCGSIZE
 460       else if (ts.ts_lines != 0)
 461          scrnheight = ts.ts_lines;
 462 #endif
 463       else
 464          scrnheight = 24;
 465
 466 #if defined TIOCGWINSZ || defined TIOCGSIZE
 467       if (0 ==
 468 # ifdef TIOCGWINSZ
 469             (realscreenheight = ws.ws_row)
 470 # else
 471             (realscreenheight = ts.ts_lines)
 472 # endif
 473       )
 474          realscreenheight = 24;
 475 #endif
 476    }
 477
 478    if (scrnwidth == 0 && 0 ==
 479 #ifdef TIOCGWINSZ
 480          (scrnwidth = ws.ws_col)
 481 #elif defined TIOCGSIZE
 482          (scrnwidth = ts.ts_cols)
 483 #endif
 484    )
 485       scrnwidth = 80;
 486
 487 jleave:
 488 #ifdef SIGWINCH
 489    if (is_sighdl && (options & OPT_INTERACTIVE))
 490       n_tty_signal(SIGWINCH);
 491 #endif
 492    NYD_LEAVE;
 493 }
 494
 495 static sigjmp_buf __hdrjmp; /* XXX */
 496
 497 static int
 498 _rcv_mode(char const *folder, char const *Larg, struct X_arg *xhp)
 499 {
 500    int i;
 501    sighandler_type prevint;
 502    NYD_ENTER;
 503
 504    if (folder == NULL)
 505       folder = "%";
 506
 507    if (options & OPT_QUICKRUN_MASK)
 508       i = FEDIT_RDONLY;
 509    else
 510       i = FEDIT_NONE;
 511    i = setfile(folder, i);
 512    if (i < 0) {
 513       exit_status = EXIT_ERR; /* error already reported */
 514       goto jquit;
 515    }
 516    if (options & OPT_QUICKRUN_MASK) {
 517       exit_status = i;
 518       if (i == EXIT_OK && (!(options & OPT_EXISTONLY) ||
 519             (options & OPT_HEADERLIST)))
 520          print_header_summary(Larg);
 521       goto jquit;
 522    }
 523    check_folder_hook(FAL0);
 524
 525    if (i > 0 && !ok_blook(emptystart)) {
 526       exit_status = EXIT_ERR;
 527       goto jleave;
 528    }
 529
 530    if (sigsetjmp(__hdrjmp, 1) == 0) {
 531       if ((prevint = safe_signal(SIGINT, SIG_IGN)) != SIG_IGN)
 532          safe_signal(SIGINT, _hdrstop);
 533       if (!(options & OPT_N_FLAG)) {
 534          if (!ok_blook(quiet))
 535             printf(_("%s version %s.  Type ? for help.\n"),
 536                (ok_blook(bsdcompat) ? "Mail" : uagent), ok_vlook(version));
 537          announce(1);
 538          fflush(stdout);
 539       }
 540       safe_signal(SIGINT, prevint);
 541    }
 542
 543    /* Enter the command loop */
 544    if (xhp == NULL || _X_arg_eval(xhp)) {
 545       if (options & OPT_INTERACTIVE)
 546          n_tty_init();
 547       commands();
 548       if (options & OPT_INTERACTIVE)
 549          n_tty_destroy();
 550    }
 551
 552    if (mb.mb_type == MB_FILE || mb.mb_type == MB_MAILDIR) {
 553       safe_signal(SIGHUP, SIG_IGN);
 554       safe_signal(SIGINT, SIG_IGN);
 555       safe_signal(SIGQUIT, SIG_IGN);
 556    }
 557 jquit:
 558    save_mbox_for_possible_quitstuff();
 559    quit();
 560 jleave:
 561    NYD_LEAVE;
 562    return exit_status;
 563 }
 564
 565 static void
 566 _hdrstop(int signo)
 567 {
 568    NYD_X; /* Signal handler */
 569    UNUSED(signo);
 570
 571    fflush(stdout);
 572    n_err_sighdl(_("\nInterrupt\n"));
 573    siglongjmp(__hdrjmp, 1);
 574 }
 575
 576 static bool_t
 577 _X_arg_eval(struct X_arg *xhp) /* TODO error handling not right */
 578 {
 579    struct eval_ctx ev;
 580    struct X_arg *xp;
 581    bool_t rv = TRU1;
 582    NYD_ENTER;
 583
 584    while ((xp = xhp) != NULL) {
 585       xhp = xp->xa_next;
 586
 587       memset(&ev, 0, sizeof ev);
 588       ev.ev_line.s = xp->xa_cmd_buf;
 589       ev.ev_line.l = xp->xa_cmd_len;
 590       ev.ev_is_recursive = TRU1;
 591       pstate &= ~PS_HOOK_MASK;
 592       rv = (evaluate(&ev) == 0);
 593       free(xp);
 594
 595       if (!rv) {
 596          if (exit_status == EXIT_OK)
 597             exit_status = EXIT_ERR;
 598          break;
 599       }
 600       if ((options & OPT_BATCH_FLAG) && ok_blook(batch_exit_on_error)) {
 601          if (exit_status != EXIT_OK)
 602             break;
 603          if (pstate & PS_EVAL_ERROR) {
 604             exit_status = EXIT_ERR;
 605             break;
 606          }
 607       }
 608    }
 609    NYD_LEAVE;
 610    return rv;
 611 }
 612
 613 int
 614 main(int argc, char *argv[])
 615 {
 616    static char const optstr[] = "A:a:Bb:c:dEeFfHhiL:NnO:q:Rr:S:s:tu:VvX:~#.",
 617       usagestr[] = N_(
 618          " Synopsis:\n"
 619          "  %s -h | --help\n"
 620          "  %s [-BdEFintv~] [-A account]\n"
 621          "\t [-a attachment] [-b bcc-address] [-c cc-address]\n"
 622          "\t [-q file] [-r from-address] [-S var[=value]...]\n"
 623          "\t [-s subject] [-X cmd] [-.] to-address... [-- mta-option...]\n"
 624          "  %s [-BdEeHiNnRv~#] [-A account]\n"
 625          "\t [-L spec-list] [-r from-address] [-S var[=value]...]\n"
 626          "\t [-X cmd] -f [file] [-- mta-option...]\n"
 627          "  %s [-BdEeHiNnRv~#] [-A account]\n"
 628          "\t [-L spec-list] [-r from-address] [-S var[=value]...]\n"
 629          "\t [-u user] [-X cmd] [-- mta-option...]\n"
 630       );
 631 #define _USAGE_ARGS , progname, progname, progname, progname
 632
 633    struct X_arg *X_head = NULL, *X_curr = /* silence CC */ NULL;
 634    struct a_arg *a_head = NULL, *a_curr = /* silence CC */ NULL;
 635    struct name *to = NULL, *cc = NULL, *bcc = NULL;
 636    struct attachment *attach = NULL;
 637    char *cp = NULL, *subject = NULL, *qf = NULL, *Aarg = NULL, *Larg = NULL;
 638    char const *okey, **oargs = NULL, *folder = NULL, *emsg = NULL;
 639    size_t oargs_size = 0, oargs_count = 0, smopts_size = 0;
 640    int i;
 641    NYD_ENTER;
 642
 643    /*
 644     * Start our lengthy setup, finalize by setting PS_STARTED
 645     */
 646
 647    progname = argv[0];
 648    _startup();
 649
 650    /* Command line parsing
 651     * Variable settings need to be done twice, since the user surely wants the
 652     * setting to take effect immediately, but also doesn't want it to be
 653     * overwritten from within resource files */
 654    while ((i = _getopt(argc, argv, optstr)) >= 0) {
 655       switch (i) {
 656       case 'A':
 657          /* Execute an account command later on */
 658          Aarg = _oarg;
 659          break;
 660       case 'a':
 661          options |= OPT_SENDMODE;
 662          {  struct a_arg *nap = salloc(sizeof(struct a_arg));
 663             if (a_head == NULL)
 664                a_head = nap;
 665             else
 666                a_curr->aa_next = nap;
 667             nap->aa_next = NULL;
 668             nap->aa_file = _oarg;
 669             a_curr = nap;
 670          }
 671          break;
 672       case 'B':
 673          /* Make 0/1 line buffered */
 674          setvbuf(stdin, NULL, _IOLBF, 0);
 675          setvbuf(stdout, NULL, _IOLBF, 0);
 676          break;
 677       case 'b':
 678          /* Get Blind Carbon Copy Recipient list */
 679          options |= OPT_SENDMODE;
 680          bcc = cat(bcc, lextract(_oarg, GBCC | GFULL));
 681          break;
 682       case 'c':
 683          /* Get Carbon Copy Recipient list */
 684          options |= OPT_SENDMODE;
 685          cc = cat(cc, lextract(_oarg, GCC | GFULL));
 686          break;
 687       case 'd':
 688          ok_bset(debug, TRU1);
 689          okey = "debug";
 690          goto joarg;
 691       case 'E':
 692          ok_bset(skipemptybody, TRU1);
 693          okey = "skipemptybody";
 694          goto joarg;
 695       case 'e':
 696          options |= OPT_EXISTONLY;
 697          break;
 698       case 'F':
 699          options |= OPT_F_FLAG | OPT_SENDMODE;
 700          break;
 701       case 'f':
 702          /* User is specifying file to "edit" with Mail, as opposed to reading
 703           * system mailbox.  If no argument is given, we read his mbox file.
 704           * Check for remaining arguments later */
 705          folder = "&";
 706          break;
 707       case 'H':
 708          options |= OPT_HEADERSONLY;
 709          break;
 710       case 'h':
 711          n_err(V_(usagestr) _USAGE_ARGS);
 712          goto jleave;
 713       case 'i':
 714          /* Ignore interrupts */
 715          ok_bset(ignore, TRU1);
 716          okey = "ignore";
 717          goto joarg;
 718       case 'L':
 719          Larg = _oarg;
 720          options |= OPT_HEADERLIST;
 721          if (*Larg == '"' || *Larg == '\'') { /* TODO list.c:listspec_check() */
 722             size_t j = strlen(++Larg);
 723             if (j > 0)
 724                Larg[j - 1] = '\0';
 725          }
 726          break;
 727       case 'N':
 728          /* Avoid initial header printing */
 729          ok_bset(header, FAL0);
 730          okey = "noheader";
 731          goto joarg;
 732       case 'n':
 733          /* Don't source "unspecified system start-up file" */
 734          options |= OPT_NOSRC;
 735          break;
 736       case 'O':
 737          /* Additional options to pass-through to MTA TODO v15-compat legacy */
 738          if (smopts_count == (size_t)smopts_size)
 739             smopts_size = _grow_cpp(&smopts, smopts_size + 8, smopts_count);
 740          smopts[smopts_count++] = _oarg;
 741          break;
 742       case 'q':
 743          /* Quote file TODO drop? -Q with real quote?? what ? */
 744          options |= OPT_SENDMODE;
 745          if (*_oarg != '-')
 746             qf = _oarg;
 747          break;
 748       case 'R':
 749          /* Open folders read-only */
 750          options |= OPT_R_FLAG;
 751          break;
 752       case 'r':
 753          /* Set From address. */
 754          options |= OPT_r_FLAG;
 755          if (_oarg[0] != '\0') {
 756             struct name *fa = nalloc(_oarg, GSKIN | GFULL | GFULLEXTRA);
 757
 758             if (is_addr_invalid(fa, EACM_STRICT | EACM_NOLOG)) {
 759                emsg = N_("Invalid address argument with -r");
 760                goto jusage;
 761             }
 762             option_r_arg = fa;
 763             /* TODO -r options is set in smopts, but may
 764              * TODO be overwritten by setting from= in
 765              * TODO an interactive session!
 766              * TODO Maybe disable setting of from?
 767              * TODO Warn user?  Update manual!! */
 768             okey = savecat("from=", fa->n_fullname);
 769             goto joarg;
 770          }
 771          break;
 772       case 'S':
 773          /* Set variable (twice) */
 774          {  char *a[2];
 775             okey = a[0] = _oarg;
 776             a[1] = NULL;
 777             c_set(a);
 778          }
 779 joarg:
 780          if (oargs_count == oargs_size)
 781             oargs_size = _grow_cpp(&oargs, oargs_size + 8, oargs_count);
 782          oargs[oargs_count++] = okey;
 783          break;
 784       case 's':
 785          /* Subject: */
 786          subject = _oarg;
 787          options |= OPT_SENDMODE;
 788          break;
 789       case 't':
 790          /* Read defined set of headers from mail to be send */
 791          options |= OPT_SENDMODE | OPT_t_FLAG;
 792          break;
 793       case 'u':
 794          /* Set user name to pretend to be; don't set OPT_u_FLAG yet, this is
 795           * done as necessary in _setup_vars() above */
 796          myname = _oarg;
 797          break;
 798       case 'V':
 799          puts(ok_vlook(version));
 800          exit(EXIT_OK);
 801          /* NOTREACHED */
 802       case 'v':
 803          /* Be verbose */
 804          ok_bset(verbose, TRU1);
 805          okey = "verbose";
 806          goto joarg;
 807       case 'X': {
 808             size_t l = strlen(_oarg);
 809             struct X_arg *nxp = smalloc(sizeof(*nxp) -
 810                   VFIELD_SIZEOF(struct X_arg, xa_cmd_buf) + l +1);
 811             if (X_head == NULL)
 812                X_head = nxp;
 813             else
 814                X_curr->xa_next = nxp;
 815             X_curr = nxp;
 816             nxp->xa_next = NULL;
 817             nxp->xa_cmd_len = l;
 818             memcpy(nxp->xa_cmd_buf, _oarg, l +1);
 819          }
 820          break;
 821       case '~':
 822          /* Enable tilde escapes even in non-interactive mode */
 823          options |= OPT_TILDE_FLAG;
 824          break;
 825       case '#':
 826          /* Work in batch mode, even if non-interactive */
 827          if (oargs_count + 6 >= oargs_size)
 828             oargs_size = _grow_cpp(&oargs, oargs_size + 8, oargs_count);
 829          /* xxx Setting most of the -# options immediately is useless, so be
 830           * selective in what is set immediately */
 831          options |= OPT_TILDE_FLAG | OPT_BATCH_FLAG;
 832          folder = "/dev/null";
 833          ok_bset(dot, TRU1);
 834          ok_bset(emptystart, TRU1);
 835          ok_bset(header, FAL0);
 836          ok_bset(quiet, TRU1);
 837          ok_bset(sendwait, TRU1);
 838          ok_vset(MBOX, folder);
 839          oargs[oargs_count + 0] = "dot";
 840          oargs[oargs_count + 1] = "emptystart";
 841          oargs[oargs_count + 2] = "noheader";
 842          oargs[oargs_count + 3] = "quiet";
 843          oargs[oargs_count + 4] = "sendwait";
 844          oargs[oargs_count + 5] = "MBOX=/dev/null";
 845          oargs_count += 6;
 846          break;
 847       case '.':
 848          options |= OPT_SENDMODE;
 849          goto jgetopt_done;
 850       case '?':
 851 jusage:
 852          if (emsg != NULL)
 853             n_err("%s\n", V_(emsg));
 854          n_err(V_(usagestr) _USAGE_ARGS);
 855 #undef _USAGE_ARGS
 856          exit_status = EXIT_USE;
 857          goto jleave;
 858       }
 859    }
 860 jgetopt_done:
 861    ;
 862
 863    /* The normal arguments may be followed by MTA arguments after a "--";
 864     * however, -f may take off an argument, too, and before that.
 865     * Since MTA arguments after "--" require *expandargv*, delay parsing off
 866     * those options until after the resource files are loaded... */
 867    if ((cp = argv[i = _oind]) == NULL)
 868       ;
 869    else if (cp[0] == '-' && cp[1] == '-' && cp[2] == '\0')
 870       ++i;
 871    /* OPT_BATCH_FLAG sets to /dev/null, but -f can still be used and sets & */
 872    else if (folder != NULL && folder[1] == '\0') {
 873       folder = cp;
 874       if ((cp = argv[++i]) != NULL) {
 875          if (cp[0] != '-' || cp[1] != '-' || cp[2] != '\0') {
 876             emsg = N_("More than one file given with -f");
 877             goto jusage;
 878          }
 879          ++i;
 880       }
 881    } else {
 882       options |= OPT_SENDMODE;
 883       for (;;) {
 884          to = cat(to, lextract(cp, GTO | GFULL));
 885          if ((cp = argv[++i]) == NULL)
 886             break;
 887          if (cp[0] == '-' && cp[1] == '-' && cp[2] == '\0') {
 888             ++i;
 889             break;
 890          }
 891       }
 892    }
 893    _oind = i;
 894
 895    /* ...BUT, since we use salloc() for the MTA smopts storage we need to
 896     * allocate the necessary space for them before we call spreserve()! */
 897    while (argv[i] != NULL)
 898       ++i;
 899    if (smopts_count + i > smopts_size)
 900       DBG(smopts_size =) _grow_cpp(&smopts, smopts_count + i + 1, smopts_count);
 901
 902    /* Check for inconsistent arguments */
 903    if (options & OPT_SENDMODE) {
 904       if (folder != NULL && !(options & OPT_BATCH_FLAG)) {
 905          emsg = N_("Cannot give -f and people to send to.");
 906          goto jusage;
 907       }
 908       if (myname != NULL) {
 909          emsg = N_("The -u option cannot be used in send mode");
 910          goto jusage;
 911       }
 912       if (!(options & OPT_t_FLAG) && to == NULL) {
 913          emsg = N_("Send options without primary recipient specified.");
 914          goto jusage;
 915       }
 916       if (options & (OPT_EXISTONLY | OPT_HEADERSONLY | OPT_HEADERLIST)) {
 917          emsg = N_("The -e, -H and -L options cannot be used in send mode.");
 918          goto jusage;
 919       }
 920       if (options & OPT_R_FLAG) {
 921          emsg = N_("The -R option is meaningless in send mode.");
 922          goto jusage;
 923       }
 924    } else {
 925       if (folder != NULL && myname != NULL) {
 926          emsg = N_("The options -f and -u are mutually exclusive");
 927          goto jusage;
 928       }
 929       if ((options & (OPT_EXISTONLY | OPT_HEADERSONLY)) ==
 930             (OPT_EXISTONLY | OPT_HEADERSONLY)) {
 931          emsg = N_("The options -e and -H are mutual exclusive");
 932          goto jusage;
 933       }
 934       if ((options & (OPT_HEADERSONLY | OPT_HEADERLIST)) == /* TODO OBSOLETE */
 935             (OPT_HEADERSONLY | OPT_HEADERLIST))
 936          OBSOLETE(_("please use \"-e -L xy\" instead of \"-H -L xy\""));
 937    }
 938
 939    /*
 940     * Likely to go, perform more setup
 941     */
 942
 943    _setup_vars();
 944
 945    if (options & OPT_INTERACTIVE) {
 946       _setscreensize(0);
 947 #ifdef SIGWINCH
 948 # ifndef TTY_WANTS_SIGWINCH
 949       if (safe_signal(SIGWINCH, SIG_IGN) != SIG_IGN)
 950 # endif
 951          safe_signal(SIGWINCH, _setscreensize);
 952 #endif
 953    } else
 954       scrnheight = realscreenheight = 24, scrnwidth = 80;
 955
 956    /* Snapshot our string pools.  Memory is auto-reclaimed from now on */
 957    spreserve();
 958
 959    if (!(options & OPT_NOSRC) && !env_blook("NAIL_NO_SYSTEM_RC", TRU1))
 960       load(SYSCONFDIR "/" SYSCONFRC);
 961    /* *expand() returns a savestr(), but load only uses the file name for
 962     * fopen(), so it's safe to do this */
 963    if ((cp = env_vlook("MAILRC", TRU1)) == NULL)
 964       cp = UNCONST(MAILRC);
 965    load(file_expand(cp));
 966    if (env_vlook("NAIL_EXTRA_RC", TRU1) == NULL &&
 967          (cp = ok_vlook(NAIL_EXTRA_RC)) != NULL)
 968       load(file_expand(cp));
 969
 970    /* We had to wait until the resource files are loaded but it is time to get
 971     * the termcap going, so that *term-ca-mode* won't hide our output for us */
 972 #ifdef HAVE_TERMCAP
 973    if ((options & (OPT_INTERACTIVE | OPT_QUICKRUN_MASK)) == OPT_INTERACTIVE)
 974       termcap_init(); /* TODO program state machine */
 975 #endif
 976
 977    /* Now we can set the account */
 978    if (Aarg != NULL) {
 979       char const *a[2];
 980       a[0] = Aarg;
 981       a[1] = NULL;
 982       c_account(a);
 983    }
 984
 985    /* Ensure the -S and other command line options take precedence over
 986     * anything that may have been placed in resource files.
 987     * Our "ternary binary" option *verbose* needs special treament */
 988    if ((options & (OPT_VERB | OPT_VERBVERB)) == OPT_VERB)
 989       options &= ~OPT_VERB;
 990    for (i = 0; UICMP(z, i, <, oargs_count); ++i) {
 991       char const *a[2];
 992       a[0] = oargs[i];
 993       a[1] = NULL;
 994       c_set(a);
 995    }
 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 ((cp = argv[i = _oind]) != NULL) {
1003          if (isfail ||
1004                (isrestrict && !(options & (OPT_INTERACTIVE |OPT_TILDE_FLAG)))) {
1005             n_err(_("*expandargv* doesn't allow MTA arguments; consider "
1006                "using *sendmail-arguments*\n"));
1007             exit_status = EXIT_USE | EXIT_SEND_ERROR;
1008             goto jleave;
1009          }
1010          do {
1011             assert(smopts_count + 1 <= smopts_size);
1012             smopts[smopts_count++] = cp;
1013          } while ((cp = argv[++i]) != NULL);
1014       }
1015    }
1016
1017    /*
1018     * We're finally completely setup and ready to go
1019     */
1020
1021    pstate |= PS_STARTED;
1022
1023    if (options & OPT_DEBUG)
1024       n_err(_("user = %s, homedir = %s\n"), myname, homedir);
1025
1026    if (!(options & OPT_SENDMODE)) {
1027       exit_status = _rcv_mode(folder, Larg, X_head);
1028       goto jleave;
1029    }
1030
1031    /* xxx exit_status = EXIT_OK; */
1032    if (X_head != NULL && !_X_arg_eval(X_head))
1033       goto jleave;
1034
1035    /* Now that full mailx(1)-style file expansion is possible handle the
1036     * attachments which we had delayed due to this.
1037     * This may use savestr(), but since we won't enter the command loop we
1038     * don't need to care about that */
1039    for (cp = NULL; a_head != NULL;) {
1040       struct attachment *nahp, *nap;
1041
1042       if ((nahp = add_attachment(attach, a_head->aa_file, &nap)) != NULL) {
1043          attach = nahp;
1044          /* Did we split a charset set name for fixation purposes? */
1045          if (cp != NULL) {
1046             nap->a_conv = AC_FIX_INCS;
1047             nap->a_input_charset = cp;
1048             cp = NULL;
1049          }
1050          a_head = a_head->aa_next;
1051          continue;
1052       }
1053       i = errno;
1054
1055       /* It may not have worked because of an appended character set name, so
1056        * try to split name and charset and retry once */
1057       if (cp == NULL && (cp = strrchr(a_head->aa_file, '=')) != NULL) {
1058          char *ncp, *nfp = savestrbuf(a_head->aa_file,
1059                PTR2SIZE(cp - a_head->aa_file));
1060
1061          for (ncp = ++cp; *ncp != '\0'; ++ncp)
1062             if (!alnumchar(*ncp) && !punctchar(*ncp))
1063                break;
1064          if (*ncp == '\0') {
1065             a_head->aa_file = nfp;
1066             continue;
1067          }
1068       }
1069
1070       n_perr(a_head->aa_file, i);
1071       exit_status = EXIT_ERR;
1072       goto jleave;
1073    }
1074
1075    if (options & OPT_INTERACTIVE)
1076       n_tty_init();
1077    mail(to, cc, bcc, subject, attach, qf, ((options & OPT_F_FLAG) != 0));
1078    if (options & OPT_INTERACTIVE)
1079       n_tty_destroy();
1080
1081 jleave:
1082 #ifdef HAVE_TERMCAP
1083    if (options & OPT_INTERACTIVE)
1084       termcap_destroy();
1085 #endif
1086 #ifdef HAVE_DEBUG
1087    sreset(FAL0);
1088    smemcheck();
1089 #endif
1090    NYD_LEAVE;
1091    return exit_status;
1092 }
1093
1094 FL int
1095 c_rexit(void *v) /* TODO program state machine */
1096 {
1097    UNUSED(v);
1098    NYD_ENTER;
1099
1100    if (!(pstate & PS_SOURCING)) {
1101 #ifdef HAVE_TERMCAP
1102       if (options & OPT_INTERACTIVE)
1103          termcap_destroy();
1104 #endif
1105       exit(EXIT_OK);
1106    }
1107    NYD_LEAVE;
1108    return 1;
1109 }
1110
1111 /* Source the others in that case! */
1112 #ifdef HAVE_AMALGAMATION
1113 # include "config.h"
1114 #endif
1115
1116 /* s-it-mode */