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 /* Verify that our size_t PRI[du]Z format string has the correct type size */
  54 PRIxZ_FMT_CTA();
  55
  56 struct a_arg {
  57    struct a_arg   *aa_next;
  58    char           *aa_file;
  59 };
  60
  61 struct X_arg {
  62    struct X_arg   *xa_next;
  63    size_t         xa_cmd_len;
  64    char           xa_cmd_buf[VFIELD_SIZE(sizeof(size_t))];
  65 };
  66
  67 /* (extern, but not with amalgamation, so define here) */
  68 VL char const        weekday_names[7 + 1][4] = {
  69    "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", ""
  70 };
  71 VL char const        month_names[12 + 1][4] = {
  72    "Jan", "Feb", "Mar", "Apr", "May", "Jun",
  73    "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", ""
  74 };
  75 VL char const        uagent[] = UAGENT;
  76 VL uc_i const        class_char[] = {
  77 /* 000 nul  001 soh  002 stx  003 etx  004 eot  005 enq  006 ack  007 bel */
  78    C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL,
  79 /* 010 bs   011 ht   012 nl   013 vt   014 np   015 cr   016 so   017 si */
  80    C_CNTRL, C_BLANK, C_WHITE, C_SPACE, C_SPACE, C_SPACE, C_CNTRL, C_CNTRL,
  81 /* 020 dle  021 dc1  022 dc2  023 dc3  024 dc4  025 nak  026 syn  027 etb */
  82    C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL,
  83 /* 030 can  031 em   032 sub  033 esc  034 fs   035 gs   036 rs   037 us */
  84    C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL,
  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 /* Initialize *tempdir*, *myname*, *homedir* */
 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                   struct X_arg *xhp);
 140
 141 /* Interrupt printing of the headers */
 142 static void    _hdrstop(int signo);
 143
 144 /* -X arg given at least once, evaluate the list in order */
 145 static bool_t  _X_arg_eval(struct X_arg *xhp);
 146
 147 static int
 148 _getopt(int argc, char * const argv[], char const *optstring)
 149 {
 150    static char const *lastp;
 151
 152    int rv = -1, colon;
 153    char const *curp;
 154    NYD_ENTER;
 155
 156    _oarg = NULL;
 157
 158    if ((colon = (optstring[0] == ':')))
 159       ++optstring;
 160    if (lastp != NULL) {
 161       curp = lastp;
 162       lastp = 0;
 163    } else {
 164       if (_oind >= argc || argv[_oind] == NULL || argv[_oind][0] != '-' ||
 165             argv[_oind][1] == '\0')
 166          goto jleave;
 167       if (argv[_oind][1] == '-' && argv[_oind][2] == '\0') {
 168          /* We need this in for MTA arg detection (easier) ++_oind;*/
 169          goto jleave;
 170       }
 171       curp = &argv[_oind][1];
 172    }
 173
 174    _oopt = curp[0];
 175    while (optstring[0] != '\0') {
 176       if (optstring[0] == ':' || optstring[0] != _oopt) {
 177          ++optstring;
 178          continue;
 179       }
 180       if (optstring[1] == ':') {
 181          if (curp[1] != '\0') {
 182             _oarg = UNCONST(curp + 1);
 183             ++_oind;
 184          } else {
 185             if ((_oind += 2) > argc) {
 186                if (!colon /*&& _oerr*/) {
 187                   n_err(_("%s: option requires an argument -- %c\n"),
 188                      argv[0], (char)_oopt);
 189                }
 190                rv = (colon ? ':' : '?');
 191                goto jleave;
 192             }
 193             _oarg = argv[_oind - 1];
 194          }
 195       } else {
 196          if (curp[1] != '\0')
 197             lastp = curp + 1;
 198          else
 199             ++_oind;
 200       }
 201       rv = _oopt;
 202       goto jleave;
 203    }
 204
 205    /* Special support for --help, which is quite common */
 206    if (_oopt == '-' && !strcmp(curp, "-help") && curp - 1 == argv[_oind]) {
 207       ++_oind;
 208       rv = 'h';
 209       goto jleave;
 210    }
 211
 212    /* Definitive error */
 213    if (!colon /*&& opterr*/)
 214       n_err(_("%s: invalid option -- %c\n"), argv[0], _oopt);
 215    if (curp[1] != '\0')
 216       lastp = curp + 1;
 217    else
 218       ++_oind;
 219    _oarg = 0;
 220    rv = '?';
 221 jleave:
 222    NYD_LEAVE;
 223    return rv;
 224 }
 225
 226 static void
 227 _startup(void)
 228 {
 229    char *cp;
 230    NYD_ENTER;
 231
 232    image = -1;
 233    dflpipe = SIG_DFL;
 234    _oind = /*_oerr =*/ 1;
 235
 236    if ((cp = strrchr(progname, '/')) != NULL)
 237       progname = ++cp;
 238
 239    /* Set up a reasonable environment */
 240
 241 #ifdef HAVE_NYD
 242    safe_signal(SIGABRT, &_nyd_oncrash);
 243 # ifdef SIGBUS
 244    safe_signal(SIGBUS, &_nyd_oncrash);
 245 # endif
 246    safe_signal(SIGFPE, &_nyd_oncrash);
 247    safe_signal(SIGILL, &_nyd_oncrash);
 248    safe_signal(SIGSEGV, &_nyd_oncrash);
 249 #endif
 250    command_manager_start();
 251
 252    if (isatty(STDIN_FILENO)) /* TODO should be isatty(0) && isatty(2)?? */
 253       options |= OPT_TTYIN | OPT_INTERACTIVE;
 254    if (isatty(STDOUT_FILENO))
 255       options |= OPT_TTYOUT;
 256    if (IS_TTY_SESSION())
 257       safe_signal(SIGPIPE, dflpipe = SIG_IGN);
 258
 259    /*  --  >8  --  8<  --  */
 260
 261    /* Define defaults for internal variables, based on POSIX 2008/Cor 1-2013 */
 262    /* (Keep in sync:
 263     * ./main.c:_startup(), ./nail.rc, ./nail.1:"Initial settings") */
 264    /* noallnet */
 265    /* noappend */
 266    ok_bset(asksub, TRU1);
 267    /* noaskbcc */
 268    /* noaskcc */
 269    /* noautoprint */
 270    /* nobang */
 271    /* nocmd */
 272    /* nocrt */
 273    /* nodebug */
 274    /* nodot */
 275    /* ok_vset(escape, ESCAPE *"~"*); TODO non-compliant */
 276    /* noflipr */
 277    /* nofolder */
 278    ok_bset(header, TRU1);
 279    /* nohold */
 280    /* noignore */
 281    /* noignoreeof */
 282    /* nokeep */
 283    /* nokeepsave */
 284    /* nometoo */
 285    /* noonehop -- Note: we ignore this one */
 286    /* nooutfolder */
 287    /* nopage */
 288    ok_vset(prompt, "\\& "); /* POSIX "? " unless *bsdcompat*, then "& " */
 289    /* noquiet */
 290    /* norecord */
 291    ok_bset(save, TRU1);
 292    /* nosendwait */
 293    /* noshowto */
 294    /* nosign */
 295    /* noSign */
 296    /* ok_vset(toplines, "5"); XXX somewhat hmm */
 297
 298    /* TODO until we have an automatic mechanism for that, set some more
 299     * TODO variables so that users see the internal fallback settings
 300     * TODO (something like "defval=X,notempty=1") */
 301    do {
 302       char const *vp;
 303
 304       vp = env_vlook("SHELL", TRU1);
 305       ok_vset(SHELL, (vp != NULL ? vp : XSHELL));
 306
 307       vp = env_vlook("LISTER", TRU1);
 308       ok_vset(LISTER, (vp != NULL ? vp : XLISTER));
 309
 310       vp = env_vlook("PAGER", TRU1);
 311       ok_vset(PAGER, (vp != NULL ? vp : XPAGER));
 312
 313       ok_vset(sendmail, SENDMAIL);
 314       ok_vset(sendmail_progname, SENDMAIL_PROGNAME);
 315    } while (0);
 316
 317    /*  --  >8  --  8<  --  */
 318
 319 #ifdef HAVE_SETLOCALE
 320    setlocale(LC_ALL, "");
 321    mb_cur_max = MB_CUR_MAX;
 322 # ifdef HAVE_NL_LANGINFO
 323    if (ok_vlook(ttycharset) == NULL && (cp = nl_langinfo(CODESET)) != NULL)
 324       ok_vset(ttycharset, cp);
 325 # endif
 326
 327 # ifdef HAVE_C90AMEND1
 328    if (mb_cur_max > 1) {
 329       wchar_t  wc;
 330       if (mbtowc(&wc, "\303\266", 2) == 2 && wc == 0xF6 &&
 331             mbtowc(&wc, "\342\202\254", 3) == 3 && wc == 0x20AC)
 332          options |= OPT_UNICODE;
 333       /* Reset possibly messed up state; luckily this also gives us an
 334        * indication wether the encoding has locking shift state sequences */
 335       /* TODO temporary - use option bits! */
 336       if (mbtowc(&wc, NULL, mb_cur_max))
 337          options |= OPT_ENC_MBSTATE;
 338    }
 339 # endif
 340 #else
 341    mb_cur_max = 1;
 342 #endif
 343
 344 #ifdef HAVE_ICONV
 345    iconvd = (iconv_t)-1;
 346 #endif
 347    NYD_LEAVE;
 348 }
 349
 350 static size_t
 351 _grow_cpp(char const ***cpp, size_t newsize, size_t oldcnt)
 352 {
 353    /* Before spreserve(): use our string pool instead of LibC heap */
 354    char const **newcpp;
 355    NYD_ENTER;
 356
 357    newcpp = salloc(sizeof(char*) * newsize);
 358
 359    if (oldcnt > 0)
 360       memcpy(newcpp, *cpp, oldcnt * sizeof(char*));
 361    *cpp = newcpp;
 362    NYD_LEAVE;
 363    return newsize;
 364 }
 365
 366 static void
 367 _setup_vars(void)
 368 {
 369    /* Before spreserve(): use our string pool instead of LibC heap */
 370    /* XXX further check paths? */
 371    char const *cp;
 372    uid_t uid;
 373    struct passwd *pwuid, *pw;
 374    NYD_ENTER;
 375
 376    tempdir = ((cp = env_vlook("TMPDIR", TRU1)) != NULL)
 377          ? savestr(cp) : TMPDIR_FALLBACK;
 378
 379    cp = (myname == NULL) ? env_vlook("USER", TRU1) : myname;
 380    group_id = getgid();
 381    user_id = uid = getuid();
 382    if ((pwuid = getpwuid(uid)) == NULL)
 383       n_panic(_("Cannot associate a name with uid %u"), user_id);
 384    if (cp == NULL || *cp == '\0')
 385       myname = pwuid->pw_name;
 386    else if ((pw = getpwnam(cp)) == NULL) {
 387       n_alert(_("\"%s\" is not a user of this system"), cp);
 388       exit(EXIT_NOUSER);
 389    } else {
 390       myname = pw->pw_name;
 391       if (pw->pw_uid != uid)
 392          options |= OPT_u_FLAG;
 393    }
 394    myname = savestr(myname);
 395    /* XXX myfullname = pw->pw_gecos[OPTIONAL!] -> GUT THAT; TODO pw_shell */
 396
 397    if ((cp = env_vlook("HOME", TRU1)) == NULL)
 398       cp = "."; /* XXX User and Login objects; Login: pw->pw_dir */
 399    homedir = savestr(cp);
 400    NYD_LEAVE;
 401 }
 402
 403 static void
 404 _setscreensize(int is_sighdl) /* TODO global policy; int wraps; minvals! */
 405 {
 406    struct termios tbuf;
 407 #ifdef TIOCGWINSZ
 408    struct winsize ws;
 409 #elif defined TIOCGSIZE
 410    struct ttysize ts;
 411 #endif
 412    NYD_ENTER;
 413
 414    scrnheight = realscreenheight = scrnwidth = 0;
 415
 416    /* (Also) POSIX: LINES and COLUMNS always override.  Adjust this
 417     * a little bit to be able to honour resizes during our lifetime and
 418     * only honour it upon first run; abuse *is_sighdl* as an indicator */
 419    if (!is_sighdl) {
 420       char *cp;
 421       long i;
 422
 423       if ((cp = env_vlook("LINES", FAL0)) != NULL &&
 424             (i = strtol(cp, NULL, 10)) > 0 && i < INT_MAX)
 425          scrnheight = realscreenheight = (int)i;
 426       if ((cp = env_vlook("COLUMNS", FAL0)) != NULL &&
 427             (i = strtol(cp, NULL, 10)) > 0 && i < INT_MAX)
 428          scrnwidth = (int)i;
 429
 430       if (scrnwidth != 0 && scrnheight != 0)
 431          goto jleave;
 432    }
 433
 434 #ifdef TIOCGWINSZ
 435    if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1)
 436       ws.ws_col = ws.ws_row = 0;
 437 #elif defined TIOCGSIZE
 438    if (ioctl(STDOUT_FILENO, TIOCGSIZE, &ws) == -1)
 439       ts.ts_lines = ts.ts_cols = 0;
 440 #endif
 441
 442    if (scrnheight == 0) {
 443       speed_t ospeed = ((tcgetattr(STDOUT_FILENO, &tbuf) == -1)
 444             ? B9600 : cfgetospeed(&tbuf));
 445
 446       if (ospeed < B1200)
 447          scrnheight = 9;
 448       else if (ospeed == B1200)
 449          scrnheight = 14;
 450 #ifdef TIOCGWINSZ
 451       else if (ws.ws_row != 0)
 452          scrnheight = ws.ws_row;
 453 #elif defined TIOCGSIZE
 454       else if (ts.ts_lines != 0)
 455          scrnheight = ts.ts_lines;
 456 #endif
 457       else
 458          scrnheight = 24;
 459
 460 #if defined TIOCGWINSZ || defined TIOCGSIZE
 461       if (0 ==
 462 # ifdef TIOCGWINSZ
 463             (realscreenheight = ws.ws_row)
 464 # else
 465             (realscreenheight = ts.ts_lines)
 466 # endif
 467       )
 468          realscreenheight = 24;
 469 #endif
 470    }
 471
 472    if (scrnwidth == 0 && 0 ==
 473 #ifdef TIOCGWINSZ
 474          (scrnwidth = ws.ws_col)
 475 #elif defined TIOCGSIZE
 476          (scrnwidth = ts.ts_cols)
 477 #endif
 478    )
 479       scrnwidth = 80;
 480
 481 jleave:
 482 #ifdef SIGWINCH
 483    if (is_sighdl && IS_TTY_SESSION())
 484       tty_signal(SIGWINCH);
 485 #endif
 486    NYD_LEAVE;
 487 }
 488
 489 static sigjmp_buf __hdrjmp; /* XXX */
 490
 491 static int
 492 _rcv_mode(char const *folder, char const *Larg, struct X_arg *xhp)
 493 {
 494    char *cp;
 495    int i;
 496    sighandler_type prevint;
 497    NYD_ENTER;
 498
 499    if (folder == NULL)
 500       folder = "%";
 501    else if (*folder == '@') {
 502       /* This must be treated specially to make possible invocation like
 503        * -A imap -f @mailbox */
 504       if ((cp = ok_vlook(folder)) != NULL && which_protocol(cp) == PROTO_IMAP)
 505          n_strlcpy(mailname, cp, PATH_MAX);
 506    }
 507
 508    if (options & OPT_QUICKRUN_MASK)
 509       i = FEDIT_RDONLY;
 510    else
 511       i = FEDIT_NONE;
 512    i = setfile(folder, i);
 513    if (i < 0) {
 514       exit_status = EXIT_ERR; /* error already reported */
 515       goto jquit;
 516    }
 517    if (options & OPT_QUICKRUN_MASK) {
 518       exit_status = i;
 519       if (!(options & OPT_EXISTONLY) && i == EXIT_OK)
 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          tty_init();
 547       commands();
 548       if (options & OPT_INTERACTIVE)
 549          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:DdEeFfHhiL:NnO:q:Rr:S:s:tu:VvX:~#.",
 617       usagestr[] = N_(
 618          " Synopsis:\n"
 619          "  %s -h | --help\n"
 620          "  %s [-BDdEFintv~] [-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 [-BDdEeHiNnRv~#] [-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 [-BDdEeHiNnRv~#] [-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 #ifdef HAVE_IMAP
 689          ok_bset(disconnected, TRU1);
 690          okey = "disconnected";
 691          goto joarg;
 692 #else
 693          break;
 694 #endif
 695       case 'd':
 696          ok_bset(debug, TRU1);
 697          okey = "debug";
 698          goto joarg;
 699       case 'E':
 700          ok_bset(skipemptybody, TRU1);
 701          okey = "skipemptybody";
 702          goto joarg;
 703       case 'e':
 704          options |= OPT_EXISTONLY;
 705          break;
 706       case 'F':
 707          options |= OPT_F_FLAG | OPT_SENDMODE;
 708          break;
 709       case 'f':
 710          /* User is specifying file to "edit" with Mail, as opposed to reading
 711           * system mailbox.  If no argument is given, we read his mbox file.
 712           * Check for remaining arguments later */
 713          folder = "&";
 714          break;
 715       case 'H':
 716          options |= OPT_HEADERSONLY;
 717          break;
 718       case 'h':
 719          n_err(V_(usagestr) _USAGE_ARGS);
 720          goto jleave;
 721       case 'i':
 722          /* Ignore interrupts */
 723          ok_bset(ignore, TRU1);
 724          okey = "ignore";
 725          goto joarg;
 726       case 'L':
 727          Larg = _oarg;
 728          options |= OPT_HEADERLIST;
 729          if (*Larg == '"' || *Larg == '\'') { /* TODO list.c:listspec_check() */
 730             size_t j = strlen(++Larg);
 731             if (j > 0)
 732                Larg[j - 1] = '\0';
 733          }
 734          break;
 735       case 'N':
 736          /* Avoid initial header printing */
 737          ok_bset(header, FAL0);
 738          okey = "noheader";
 739          goto joarg;
 740       case 'n':
 741          /* Don't source "unspecified system start-up file" */
 742          options |= OPT_NOSRC;
 743          break;
 744       case 'O':
 745          /* Additional options to pass-through to MTA TODO v15-compat legacy */
 746          if (smopts_count == (size_t)smopts_size)
 747             smopts_size = _grow_cpp(&smopts, smopts_size + 8, smopts_count);
 748          smopts[smopts_count++] = _oarg;
 749          break;
 750       case 'q':
 751          /* Quote file TODO drop? -Q with real quote?? what ? */
 752          options |= OPT_SENDMODE;
 753          if (*_oarg != '-')
 754             qf = _oarg;
 755          break;
 756       case 'R':
 757          /* Open folders read-only */
 758          options |= OPT_R_FLAG;
 759          break;
 760       case 'r':
 761          /* Set From address. */
 762          options |= OPT_r_FLAG;
 763          if (_oarg[0] != '\0') {
 764             struct name *fa = nalloc(_oarg, GSKIN | GFULL | GFULLEXTRA);
 765
 766             if (is_addr_invalid(fa, EACM_STRICT | EACM_NOLOG)) {
 767                emsg = N_("Invalid address argument with -r");
 768                goto jusage;
 769             }
 770             option_r_arg = fa;
 771             /* TODO -r options is set in smopts, but may
 772              * TODO be overwritten by setting from= in
 773              * TODO an interactive session!
 774              * TODO Maybe disable setting of from?
 775              * TODO Warn user?  Update manual!! */
 776             okey = savecat("from=", fa->n_fullname);
 777             goto joarg;
 778          }
 779          break;
 780       case 'S':
 781          /* Set variable (twice) */
 782          {  char *a[2];
 783             okey = a[0] = _oarg;
 784             a[1] = NULL;
 785             c_set(a);
 786          }
 787 joarg:
 788          if (oargs_count == oargs_size)
 789             oargs_size = _grow_cpp(&oargs, oargs_size + 8, oargs_count);
 790          oargs[oargs_count++] = okey;
 791          break;
 792       case 's':
 793          /* Subject: */
 794          subject = _oarg;
 795          options |= OPT_SENDMODE;
 796          break;
 797       case 't':
 798          /* Read defined set of headers from mail to be send */
 799          options |= OPT_SENDMODE | OPT_t_FLAG;
 800          break;
 801       case 'u':
 802          /* Set user name to pretend to be; don't set OPT_u_FLAG yet, this is
 803           * done as necessary in _setup_vars() above */
 804          myname = _oarg;
 805          break;
 806       case 'V':
 807          puts(ok_vlook(version));
 808          exit(EXIT_OK);
 809          /* NOTREACHED */
 810       case 'v':
 811          /* Be verbose */
 812          ok_bset(verbose, TRU1);
 813          okey = "verbose";
 814          goto joarg;
 815       case 'X': {
 816             size_t l = strlen(_oarg);
 817             struct X_arg *nxp = smalloc(sizeof(*nxp) -
 818                   VFIELD_SIZEOF(struct X_arg, xa_cmd_buf) + l +1);
 819             if (X_head == NULL)
 820                X_head = nxp;
 821             else
 822                X_curr->xa_next = nxp;
 823             X_curr = nxp;
 824             nxp->xa_next = NULL;
 825             nxp->xa_cmd_len = l;
 826             memcpy(nxp->xa_cmd_buf, _oarg, l +1);
 827          }
 828          break;
 829       case '~':
 830          /* Enable tilde escapes even in non-interactive mode */
 831          options |= OPT_TILDE_FLAG;
 832          break;
 833       case '#':
 834          /* Work in batch mode, even if non-interactive */
 835          if (oargs_count + 6 >= oargs_size)
 836             oargs_size = _grow_cpp(&oargs, oargs_size + 8, oargs_count);
 837          /* xxx Setting most of the -# options immediately is useless, so be
 838           * selective in what is set immediately */
 839          options |= OPT_TILDE_FLAG | OPT_BATCH_FLAG;
 840          folder = "/dev/null";
 841          ok_bset(dot, TRU1);
 842          ok_bset(emptystart, TRU1);
 843          ok_bset(header, FAL0);
 844          ok_bset(quiet, TRU1);
 845          ok_bset(sendwait, TRU1);
 846          ok_vset(MBOX, folder);
 847          oargs[oargs_count + 0] = "dot";
 848          oargs[oargs_count + 1] = "emptystart";
 849          oargs[oargs_count + 2] = "noheader";
 850          oargs[oargs_count + 3] = "quiet";
 851          oargs[oargs_count + 4] = "sendwait";
 852          oargs[oargs_count + 5] = "MBOX=/dev/null";
 853          oargs_count += 6;
 854          break;
 855       case '.':
 856          options |= OPT_SENDMODE;
 857          goto jgetopt_done;
 858       case '?':
 859 jusage:
 860          if (emsg != NULL)
 861             n_err("%s\n", V_(emsg));
 862          n_err(V_(usagestr) _USAGE_ARGS);
 863 #undef _USAGE_ARGS
 864          exit_status = EXIT_USE;
 865          goto jleave;
 866       }
 867    }
 868 jgetopt_done:
 869    ;
 870
 871    /* The normal arguments may be followed by MTA arguments after a "--";
 872     * however, -f may take off an argument, too, and before that.
 873     * Since MTA arguments after "--" require *expandargv*, delay parsing off
 874     * those options until after the resource files are loaded... */
 875    if ((cp = argv[i = _oind]) == NULL)
 876       ;
 877    else if (cp[0] == '-' && cp[1] == '-' && cp[2] == '\0')
 878       ++i;
 879    /* OPT_BATCH_FLAG sets to /dev/null, but -f can still be used and sets & */
 880    else if (folder != NULL && folder[1] == '\0') {
 881       folder = cp;
 882       if ((cp = argv[++i]) != NULL) {
 883          if (cp[0] != '-' || cp[1] != '-' || cp[2] != '\0') {
 884             emsg = N_("More than one file given with -f");
 885             goto jusage;
 886          }
 887          ++i;
 888       }
 889    } else {
 890       options |= OPT_SENDMODE;
 891       for (;;) {
 892          to = cat(to, lextract(cp, GTO | GFULL));
 893          if ((cp = argv[++i]) == NULL)
 894             break;
 895          if (cp[0] == '-' && cp[1] == '-' && cp[2] == '\0') {
 896             ++i;
 897             break;
 898          }
 899       }
 900    }
 901    _oind = i;
 902
 903    /* ...BUT, since we use salloc() for the MTA smopts storage we need to
 904     * allocate the necessary space for them before we call spreserve()! */
 905    while (argv[i] != NULL)
 906       ++i;
 907    if (smopts_count + i > smopts_size)
 908       DBG(smopts_size =) _grow_cpp(&smopts, smopts_count + i + 1, smopts_count);
 909
 910    /* Check for inconsistent arguments */
 911    if (options & OPT_SENDMODE) {
 912       if (folder != NULL && !(options & OPT_BATCH_FLAG)) {
 913          emsg = N_("Cannot give -f and people to send to.");
 914          goto jusage;
 915       }
 916       if (myname != NULL) {
 917          emsg = N_("The -u option cannot be used in send mode");
 918          goto jusage;
 919       }
 920       if (!(options & OPT_t_FLAG) && to == NULL) {
 921          emsg = N_("Send options without primary recipient specified.");
 922          goto jusage;
 923       }
 924       if (options & OPT_EXISTONLY) {
 925          emsg = N_("The -e option cannot be used in send mode.");
 926          goto jusage;
 927       }
 928       if (options & (OPT_HEADERSONLY | OPT_HEADERLIST)) {
 929          emsg = N_("The -H and -L options cannot be used in send mode.");
 930          goto jusage;
 931       }
 932       if (options & OPT_R_FLAG) {
 933          emsg = N_("The -R option is meaningless in send mode.");
 934          goto jusage;
 935       }
 936    } else {
 937       if (folder != NULL && myname != NULL) {
 938          emsg = N_("The options -f and -u are mutually exclusive");
 939          goto jusage;
 940       }
 941       if ((options & OPT_EXISTONLY) &&
 942             (options & (OPT_HEADERSONLY | OPT_HEADERLIST))) {
 943          emsg = N_("The option -e is mutual exclusive with -H and -L");
 944          goto jusage;
 945       }
 946    }
 947
 948    /*
 949     * Likely to go, perform more setup
 950     */
 951
 952    _setup_vars();
 953
 954    if (options & OPT_INTERACTIVE) {
 955       _setscreensize(0);
 956 #ifdef SIGWINCH
 957 # ifndef TTY_WANTS_SIGWINCH
 958       if (safe_signal(SIGWINCH, SIG_IGN) != SIG_IGN)
 959 # endif
 960          safe_signal(SIGWINCH, _setscreensize);
 961 #endif
 962    } else
 963       scrnheight = realscreenheight = 24, scrnwidth = 80;
 964
 965    /* Snapshot our string pools.  Memory is auto-reclaimed from now on */
 966    spreserve();
 967
 968    if (!(options & OPT_NOSRC) && !env_blook("NAIL_NO_SYSTEM_RC", TRU1))
 969       load(SYSCONFRC);
 970    /* *expand() returns a savestr(), but load only uses the file name for
 971     * fopen(), so it's safe to do this */
 972    if ((cp = env_vlook("MAILRC", TRU1)) == NULL)
 973       cp = UNCONST(MAILRC);
 974    load(file_expand(cp));
 975    if (env_vlook("NAIL_EXTRA_RC", TRU1) == NULL &&
 976          (cp = ok_vlook(NAIL_EXTRA_RC)) != NULL)
 977       load(file_expand(cp));
 978
 979    /* We had to wait until the resource files are loaded but it is time to get
 980     * the termcap going, so that *term-ca-mode* won't hide our output for us */
 981 #ifdef HAVE_TERMCAP
 982    if ((options & (OPT_INTERACTIVE | OPT_QUICKRUN_MASK)) == OPT_INTERACTIVE)
 983       termcap_init(); /* TODO program state machine */
 984 #endif
 985
 986    /* Now we can set the account */
 987    if (Aarg != NULL) {
 988       char const *a[2];
 989       a[0] = Aarg;
 990       a[1] = NULL;
 991       c_account(a);
 992    }
 993
 994    /* Ensure the -S and other command line options take precedence over
 995     * anything that may have been placed in resource files.
 996     * Our "ternary binary" option *verbose* needs special treament */
 997    if ((options & (OPT_VERB | OPT_VERBVERB)) == OPT_VERB)
 998       options &= ~OPT_VERB;
 999    for (i = 0; UICMP(z, i, <, oargs_count); ++i) {
1000       char const *a[2];
1001       a[0] = oargs[i];
1002       a[1] = NULL;
1003       c_set(a);
1004    }
1005
1006    /* Additional options to pass-through to MTA, and allowed to do so? */
1007    if ((cp = ok_vlook(expandargv)) != NULL) {
1008       bool_t isfail = !asccasecmp(cp, "fail"),
1009          isrestrict = (!isfail && !asccasecmp(cp, "restrict"));
1010
1011       if ((cp = argv[i = _oind]) != NULL) {
1012          if (isfail ||
1013                (isrestrict && !(options & (OPT_INTERACTIVE |OPT_TILDE_FLAG)))) {
1014             n_err(_("*expandargv* doesn't allow MTA arguments; consider "
1015                "using *sendmail-arguments*\n"));
1016             exit_status = EXIT_USE | EXIT_SEND_ERROR;
1017             goto jleave;
1018          }
1019          do {
1020             assert(smopts_count + 1 <= smopts_size);
1021             smopts[smopts_count++] = cp;
1022          } while ((cp = argv[++i]) != NULL);
1023       }
1024    }
1025
1026    /*
1027     * We're finally completely setup and ready to go
1028     */
1029
1030    pstate |= PS_STARTED;
1031
1032    if (options & OPT_DEBUG)
1033       n_err(_("user = %s, homedir = %s\n"), myname, homedir);
1034
1035    if (!(options & OPT_SENDMODE)) {
1036       exit_status = _rcv_mode(folder, Larg, X_head);
1037       goto jleave;
1038    }
1039
1040    /* xxx exit_status = EXIT_OK; */
1041    if (X_head != NULL && !_X_arg_eval(X_head))
1042       goto jleave;
1043
1044    /* Now that full mailx(1)-style file expansion is possible handle the
1045     * attachments which we had delayed due to this.
1046     * This may use savestr(), but since we won't enter the command loop we
1047     * don't need to care about that */
1048    for (cp = NULL; a_head != NULL;) {
1049       struct attachment *nahp, *nap;
1050
1051       if ((nahp = add_attachment(attach, a_head->aa_file, &nap)) != NULL) {
1052          attach = nahp;
1053          /* Did we split a charset set name for fixation purposes? */
1054          if (cp != NULL) {
1055             nap->a_conv = AC_FIX_INCS;
1056             nap->a_input_charset = cp;
1057             cp = NULL;
1058          }
1059          a_head = a_head->aa_next;
1060          continue;
1061       }
1062       i = errno;
1063
1064       /* It may not have worked because of an appended character set name, so
1065        * try to split name and charset and retry once */
1066       if (cp == NULL && (cp = strrchr(a_head->aa_file, '=')) != NULL) {
1067          char *ncp, *nfp = savestrbuf(a_head->aa_file,
1068                PTR2SIZE(cp - a_head->aa_file));
1069
1070          for (ncp = ++cp; *ncp != '\0'; ++ncp)
1071             if (!alnumchar(*ncp) && !punctchar(*ncp))
1072                break;
1073          if (*ncp == '\0') {
1074             a_head->aa_file = nfp;
1075             continue;
1076          }
1077       }
1078
1079       n_perr(a_head->aa_file, i);
1080       exit_status = EXIT_ERR;
1081       goto jleave;
1082    }
1083
1084    if (options & OPT_INTERACTIVE)
1085       tty_init();
1086    mail(to, cc, bcc, subject, attach, qf, ((options & OPT_F_FLAG) != 0));
1087    if (options & OPT_INTERACTIVE)
1088       tty_destroy();
1089
1090 jleave:
1091 #ifdef HAVE_TERMCAP
1092    if (options & OPT_INTERACTIVE)
1093       termcap_destroy();
1094 #endif
1095 #ifdef HAVE_DEBUG
1096    sreset(FAL0);
1097    smemcheck();
1098 #endif
1099    NYD_LEAVE;
1100    return exit_status;
1101 }
1102
1103 FL int
1104 c_rexit(void *v) /* TODO program state machine */
1105 {
1106    UNUSED(v);
1107    NYD_ENTER;
1108
1109    if (!(pstate & PS_SOURCING)) {
1110 #ifdef HAVE_TERMCAP
1111       if (options & OPT_INTERACTIVE)
1112          termcap_destroy();
1113 #endif
1114       exit(EXIT_OK);
1115    }
1116    NYD_LEAVE;
1117    return 1;
1118 }
1119
1120 /* Source the others in that case! */
1121 #ifdef HAVE_AMALGAMATION
1122 # include "config.h"
1123 #endif
1124
1125 /* s-it-mode */