main.c

   1 /*@ S-nail - a mail user agent derived from Berkeley Mail.
   2  *@ Startup -- interface with user.
   3  *
   4  * Copyright (c) 2000-2004 Gunnar Ritter, Freiburg i. Br., Germany.
   5  * Copyright (c) 2012 - 2014 Steffen (Daode) Nurpmeso <sdaoden@users.sf.net>.
   6  */
   7 /*
   8  * Copyright (c) 1980, 1993
   9  * The Regents of the University of California.  All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgement:
  21  *    This product includes software developed by the University of
  22  *    California, Berkeley and its contributors.
  23  * 4. Neither the name of the University nor the names of its contributors
  24  *    may be used to endorse or promote products derived from this software
  25  *    without specific prior written permission.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  37  * SUCH DAMAGE.
  38  */
  39
  40 /*
  41  * Most strcpy/sprintf functions have been changed to strncpy/snprintf to
  42  * correct several buffer overruns (at least one ot them was exploitable).
  43  * Sat Jun 20 04:58:09 CEST 1998 Alvaro Martinez Echevarria <alvaro@lander.es>
  44  * ---
  45  * Note: We set egid to realgid ... and only if we need the egid we will
  46  *       switch back temporary.  Nevertheless, I do not like seg faults.
  47  *       Werner Fink, <werner@suse.de>
  48  */
  49
  50 #ifndef HAVE_AMALGAMATION
  51 # define _MAIN_SOURCE
  52 # include "nail.h"
  53 #endif
  54
  55 #include <sys/ioctl.h>
  56
  57 #include <fcntl.h>
  58 #include <pwd.h>
  59
  60 #ifdef HAVE_NL_LANGINFO
  61 # include <langinfo.h>
  62 #endif
  63 #ifdef HAVE_SETLOCALE
  64 # include <locale.h>
  65 #endif
  66
  67 #include "version.h"
  68
  69 struct a_arg {
  70    struct a_arg   *aa_next;
  71    char           *aa_file;
  72 };
  73
  74 /* (extern, but not with amalgamation, so define here) */
  75 VL char const        weekday_names[7 + 1][4] = {
  76    "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", ""
  77 };
  78 VL char const        month_names[12 + 1][4] = {
  79    "Jan", "Feb", "Mar", "Apr", "May", "Jun",
  80    "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", ""
  81 };
  82 VL char const        uagent[] = UAGENT;
  83 VL char const        version[] = VERSION;
  84 /*VL char const        features[]; The "feature string" comes from config.h */
  85 VL uc_it const       class_char[] = {
  86 /* 000 nul  001 soh  002 stx  003 etx  004 eot  005 enq  006 ack  007 bel */
  87    C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL,
  88 /* 010 bs   011 ht   012 nl   013 vt   014 np   015 cr   016 so   017 si */
  89    C_CNTRL,  C_BLANK,  C_WHITE, C_SPACE, C_SPACE, C_SPACE, C_CNTRL, C_CNTRL,
  90 /* 020 dle  021 dc1  022 dc2  023 dc3  024 dc4  025 nak  026 syn  027 etb */
  91    C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL,
  92 /* 030 can  031 em   032 sub  033 esc  034 fs   035 gs   036 rs   037 us */
  93    C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL,
  94 /* 040 sp   041  !   042  "   043  #   044  $   045  %   046  &   047  ' */
  95    C_BLANK, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT,
  96 /* 050  (   051  )   052  *   053  +   054  ,    055  -   056  .   057  / */
  97    C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT,
  98 /* 060  0   061  1   062  2   063  3   064  4   065  5   066  6   067  7 */
  99    C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL,
 100 /* 070  8   071  9   072  :   073  ;   074  <   075  =   076  >   077  ? */
 101    C_DIGIT, C_DIGIT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT,
 102 /* 100  @   101  A   102  B   103  C   104  D   105  E   106  F   107  G */
 103    C_PUNCT, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER,
 104 /* 110  H   111  I   112  J   113  K   114  L   115  M   116  N   117  O */
 105    C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER,
 106 /* 120  P   121  Q   122  R   123  S   124  T   125  U   126  V   127  W */
 107    C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER,
 108 /* 130  X   131  Y   132  Z   133  [   134  \   135  ]   136  ^   137  _ */
 109    C_UPPER, C_UPPER, C_UPPER, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT,
 110 /* 140  `   141  a   142  b   143  c   144  d   145  e   146  f   147  g */
 111    C_PUNCT, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER,
 112 /* 150  h   151  i   152  j   153  k   154  l   155  m   156  n   157  o */
 113    C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER,
 114 /* 160  p   161  q   162  r   163  s   164  t   165  u   166  v   167  w */
 115    C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER,
 116 /* 170  x   171  y   172  z   173  {   174  |   175  }   176  ~   177 del */
 117    C_LOWER, C_LOWER, C_LOWER, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_CNTRL
 118 };
 119
 120 /* getopt(3) fallback implementation */
 121 #ifdef HAVE_GETOPT
 122 # define _oarg       optarg
 123 # define _oind       optind
 124 /*# define _oerr     opterr*/
 125 # define _oopt       optopt
 126 #else
 127 static char          *_oarg;
 128 static int           _oind, /*_oerr,*/ _oopt;
 129 #endif
 130
 131 /* getopt(3) fallback implementation */
 132 #ifdef HAVE_GETOPT
 133 # define _getopt     getopt
 134 #else
 135 static int     _getopt(int argc, char *const argv[], char const *optstring);
 136 #endif
 137
 138 /* Perform basic startup initialization */
 139 static void    _startup(void);
 140
 141 /* Grow a char** */
 142 static size_t  _grow_cpp(char const ***cpp, size_t newsize, size_t oldcnt);
 143
 144 /* Initialize *tempdir*, *myname*, *homedir* */
 145 static void    _setup_vars(void);
 146
 147 /* We're in an interactive session - compute what the screen size for printing
 148  * headers etc. should be; notify tty upon resize if *is_sighdl* is not 0.
 149  * We use the following algorithm for the height:
 150  * If baud rate < 1200, use  9
 151  * If baud rate = 1200, use 14
 152  * If baud rate > 1200, use 24 or ws_row
 153  * Width is either 80 or ws_col */
 154 static void    _setscreensize(int is_sighdl);
 155
 156 /* Ok, we are reading mail.  Decide whether we are editing a mailbox or reading
 157  * the system mailbox, and open up the right stuff */
 158 static int     _rcv_mode(char const *folder, char const *Larg);
 159
 160 /* Interrupt printing of the headers */
 161 static void    _hdrstop(int signo);
 162
 163 #ifndef HAVE_GETOPT
 164 static int
 165 _getopt(int argc, char * const argv[], char const *optstring)
 166 {
 167    static char const *lastp;
 168
 169    int rv = -1, colon;
 170    char const *curp;
 171    NYD_ENTER;
 172
 173    if ((colon = (optstring[0] == ':')))
 174       ++optstring;
 175    if (lastp != NULL) {
 176       curp = lastp;
 177       lastp = 0;
 178    } else {
 179       if (_oind >= argc || argv[_oind] == 0 || argv[_oind][0] != '-' ||
 180             argv[_oind][1] == '\0')
 181          goto jleave;
 182       if (argv[_oind][1] == '-' && argv[_oind][2] == '\0') {
 183          ++_oind;
 184          goto jleave;
 185       }
 186       curp = &argv[_oind][1];
 187    }
 188
 189    _oopt = curp[0];
 190    while (optstring[0] != '\0') {
 191       if (optstring[0] == ':' || optstring[0] != _oopt) {
 192          ++optstring;
 193          continue;
 194       }
 195       if (optstring[1] == ':') {
 196          if (curp[1] != '\0') {
 197             _oarg = UNCONST(&curp[1]);
 198             ++_oind;
 199          } else {
 200             if ((_oind += 2) > argc) {
 201                if (!colon /*&& _oerr*/) {
 202                   fprintf(stderr,
 203                      tr(79, "%s: option requires an argument -- %c\n"),
 204                      argv[0], (char)_oopt);
 205                }
 206                rv = (colon ? ':' : '?');
 207                goto jleave;
 208             }
 209             _oarg = argv[_oind - 1];
 210          }
 211       } else {
 212          if (curp[1] != '\0')
 213             lastp = &curp[1];
 214          else
 215             ++_oind;
 216          _oarg = NULL;
 217       }
 218       rv = _oopt;
 219       goto jleave;
 220    }
 221
 222    if (!colon /*&& opterr*/)
 223       fprintf(stderr, tr(78, "%s: illegal option -- %c\n"), argv[0], _oopt);
 224    if (curp[1] != '\0')
 225       lastp = &curp[1];
 226    else
 227       ++_oind;
 228    _oarg = 0;
 229    rv = '?';
 230 jleave:
 231    NYD_LEAVE;
 232    return rv;
 233 }
 234 #endif /* !HAVE_GETOPT */
 235
 236 static void
 237 _startup(void)
 238 {
 239    char *cp;
 240    NYD_ENTER;
 241
 242    /* Absolutely the first thing we do is save our egid and set it to the rgid,
 243     * so that we can safely run setgid.  We use the sgid (saved set-gid) to
 244     * allow ourselves to revert to the egid if we want (temporarily) to become
 245     * privileged XXX (s-nail-)*dotlock(-program)* [maybe forked<->Unix IPC?] */
 246    effectivegid = getegid();
 247    realgid = getgid();
 248    if (setgid(realgid) < 0) {
 249       perror("setgid");
 250       exit(1);
 251    }
 252
 253    image = -1;
 254    dflpipe = SIG_DFL;
 255 #ifndef HAVE_GETOPT
 256    _oind = /*_oerr =*/ 1;
 257 #endif
 258
 259    if ((cp = strrchr(progname, '/')) != NULL)
 260       progname = ++cp;
 261
 262    /* Set up a reasonable environment.
 263     * Figure out whether we are being run interactively,
 264     * start the SIGCHLD catcher, and so forth */
 265    safe_signal(SIGCHLD, &sigchild);
 266 #ifdef HAVE_DEBUG
 267    safe_signal(SIGABRT, &_nyd_oncrash);
 268 # ifdef SIGBUS
 269    safe_signal(SIGBUS, &_nyd_oncrash);
 270 # endif
 271    safe_signal(SIGFPE, &_nyd_oncrash);
 272    safe_signal(SIGILL, &_nyd_oncrash);
 273    safe_signal(SIGSEGV, &_nyd_oncrash);
 274 #endif
 275
 276    if (isatty(STDIN_FILENO)) /* TODO should be isatty(0) && isatty(2)?? */
 277       options |= OPT_TTYIN | OPT_INTERACTIVE;
 278    if (isatty(STDOUT_FILENO))
 279       options |= OPT_TTYOUT;
 280    if (IS_TTY_SESSION())
 281       safe_signal(SIGPIPE, dflpipe = SIG_IGN);
 282
 283    /* Define defaults for internal variables, based on POSIX 2008/Cor 1-2013 */
 284    /* noallnet */
 285    /* noappend */
 286    ok_bset(asksub, TRU1);
 287    /* noaskbcc */
 288    /* noaskcc */
 289    /* noautoprint */
 290    /* nobang */
 291    /* nocmd */
 292    /* nocrt */
 293    /* nodebug */
 294    /* nodot */
 295    /* ok_vset(escape, ESCAPE *"~"*); TODO non-compliant */
 296    /* noflipr */
 297    /* nofolder */
 298    ok_bset(header, TRU1);
 299    /* nohold */
 300    /* noignore */
 301    /* noignoreeof */
 302    /* nokeep */
 303    /* nokeepsave */
 304    /* nometoo */
 305    /* noonehop -- Note: we ignore this one */
 306    /* nooutfolder */
 307    /* nopage */
 308    ok_vset(prompt, "\\& "); /* POSIX "? " unless *bsdcompat*, then "& " */
 309    /* noquiet */
 310    /* norecord */
 311    ok_bset(save, TRU1);
 312    /* nosendwait */
 313    /* noshowto */
 314    /* nosign */
 315    /* noSign */
 316    /* ok_vset(toplines, "5"); XXX somewhat hmm */
 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          utf8 = 1;
 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       enc_has_state = mbtowc(&wc, NULL, mb_cur_max);
 336    }
 337 # endif
 338 #else
 339    mb_cur_max = 1;
 340 #endif
 341
 342 #ifdef HAVE_CATGETS
 343 # ifdef NL_CAT_LOCALE
 344    catd = catopen(CATNAME, NL_CAT_LOCALE);
 345 # else
 346    catd = catopen(CATNAME, 0);
 347 # endif
 348 #endif
 349
 350 #ifdef HAVE_ICONV
 351    iconvd = (iconv_t)-1;
 352 #endif
 353    NYD_LEAVE;
 354 }
 355
 356 static size_t
 357 _grow_cpp(char const ***cpp, size_t newsize, size_t oldcnt)
 358 {
 359    /* Before spreserve(): use our string pool instead of LibC heap */
 360    char const **newcpp;
 361    NYD_ENTER;
 362
 363    newcpp = salloc(sizeof(char*) * newsize);
 364
 365    if (oldcnt > 0)
 366       memcpy(newcpp, *cpp, oldcnt * sizeof(char*));
 367    *cpp = newcpp;
 368    NYD_LEAVE;
 369    return newsize;
 370 }
 371
 372 static void
 373 _setup_vars(void)
 374 {
 375    /* Before spreserve(): use our string pool instead of LibC heap */
 376    /* XXX further check paths? */
 377    char const *cp;
 378    uid_t uid;
 379    struct passwd *pwuid, *pw;
 380    NYD_ENTER;
 381
 382    tempdir = ((cp = getenv("TMPDIR")) != NULL) ? savestr(cp) : TMPDIR_FALLBACK;
 383
 384    cp = (myname == NULL) ? getenv("USER") : myname;
 385    uid = getuid();
 386    if ((pwuid = getpwuid(uid)) == NULL)
 387       panic(tr(201, "Cannot associate a name with uid %lu"), (ul_it)uid);
 388    if (cp == NULL)
 389       myname = pwuid->pw_name;
 390    else if ((pw = getpwnam(cp)) == NULL)
 391       panic(tr(236, "`%s' is not a user of this system"), cp);
 392    else {
 393       myname = pw->pw_name;
 394       if (pw->pw_uid != uid)
 395          options |= OPT_u_FLAG;
 396    }
 397    myname = savestr(myname);
 398    /* XXX myfullname = pw->pw_gecos[OPTIONAL!] -> GUT THAT; TODO pw_shell */
 399
 400    if ((cp = getenv("HOME")) == NULL)
 401       cp = "."; /* XXX User and Login objects; Login: pw->pw_dir */
 402    homedir = savestr(cp);
 403    NYD_LEAVE;
 404 }
 405
 406 static void
 407 _setscreensize(int is_sighdl)
 408 {
 409    struct termios tbuf;
 410 #ifdef TIOCGWINSZ
 411    struct winsize ws;
 412 #elif defined TIOCGSIZE
 413    struct ttysize ts;
 414 #endif
 415    NYD_ENTER;
 416
 417    scrnheight = realscreenheight = scrnwidth = 0;
 418
 419    /* (Also) POSIX: LINES and COLUMNS always override.  Adjust this
 420     * a little bit to be able to honour resizes during our lifetime and
 421     * only honour it upon first run; abuse *is_sighdl* as an indicator */
 422    if (!is_sighdl) {
 423       char *cp;
 424       long i;
 425
 426       if ((cp = getenv("LINES")) != NULL && (i = strtol(cp, NULL, 10)) > 0)
 427          scrnheight = realscreenheight = (int)i;
 428       if ((cp = getenv("COLUMNS")) != NULL && (i = strtol(cp, NULL, 10)) > 0)
 429          scrnwidth = (int)i;
 430
 431       if (scrnwidth != 0 && scrnheight != 0)
 432          goto jleave;
 433    }
 434
 435 #ifdef TIOCGWINSZ
 436    if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) < 0)
 437       ws.ws_col = ws.ws_row = 0;
 438 #elif defined TIOCGSIZE
 439    if (ioctl(STDOUT_FILENO, TIOCGSIZE, &ws) < 0)
 440       ts.ts_lines = ts.ts_cols = 0;
 441 #endif
 442
 443    if (scrnheight == 0) {
 444       speed_t ospeed = ((tcgetattr(STDOUT_FILENO, &tbuf) < 0)
 445             ? B9600 : cfgetospeed(&tbuf));
 446
 447       if (ospeed < B1200)
 448          scrnheight = 9;
 449       else if (ospeed == B1200)
 450          scrnheight = 14;
 451 #ifdef TIOCGWINSZ
 452       else if (ws.ws_row != 0)
 453          scrnheight = ws.ws_row;
 454 #elif defined TIOCGSIZE
 455       else if (ts.ts_lines != 0)
 456          scrnheight = ts.ts_lines;
 457 #endif
 458       else
 459          scrnheight = 24;
 460
 461 #if defined TIOCGWINSZ || defined TIOCGSIZE
 462       if (0 ==
 463 # ifdef TIOCGWINSZ
 464             (realscreenheight = ws.ws_row)
 465 # else
 466             (realscreenheight = ts.ts_lines)
 467 # endif
 468       )
 469          realscreenheight = 24;
 470 #endif
 471    }
 472
 473    if (scrnwidth == 0 && 0 ==
 474 #ifdef TIOCGWINSZ
 475          (scrnwidth = ws.ws_col)
 476 #elif defined TIOCGSIZE
 477          (scrnwidth = ts.ts_cols)
 478 #endif
 479    )
 480       scrnwidth = 80;
 481
 482 jleave:
 483 #ifdef SIGWINCH
 484    if (is_sighdl && IS_TTY_SESSION())
 485       tty_signal(SIGWINCH);
 486 #endif
 487    NYD_LEAVE;
 488 }
 489
 490 static sigjmp_buf __hdrjmp; /* XXX */
 491
 492 static int
 493 _rcv_mode(char const *folder, char const *Larg)
 494 {
 495    char *cp;
 496    int i;
 497    sighandler_type prevint;
 498    NYD_ENTER;
 499
 500    if (folder == NULL)
 501       folder = "%";
 502    else if (*folder == '@') {
 503       /* This must be treated specially to make possible invocation like
 504        * -A imap -f @mailbox */
 505       if ((cp = ok_vlook(folder)) != NULL && which_protocol(cp) == PROTO_IMAP)
 506          n_strlcpy(mailname, cp, PATH_MAX);
 507    }
 508
 509    i = setfile(folder, 0);
 510    if (i < 0) {
 511       exit_status = EXIT_ERR; /* error already reported */
 512       goto jleave;
 513    }
 514    if (options & OPT_EXISTONLY) {
 515       exit_status = i;
 516       goto jleave;
 517    }
 518
 519    if (options & (OPT_HEADERSONLY | OPT_HEADERLIST)) {
 520       print_header_summary(Larg);
 521       goto jleave;
 522    }
 523
 524    callhook(mailname, 0);
 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(tr(140, "%s version %s.  Type ? for help.\n"),
 536                (ok_blook(bsdcompat) ? "Mail" : uagent), version);
 537          announce(1);
 538          fflush(stdout);
 539       }
 540       safe_signal(SIGINT, prevint);
 541    }
 542
 543    /* Enter the command loop */
 544    if (options & OPT_INTERACTIVE)
 545       tty_init();
 546    commands();
 547    if (options & OPT_INTERACTIVE)
 548       tty_destroy();
 549
 550    if (mb.mb_type == MB_FILE || mb.mb_type == MB_MAILDIR) {
 551       safe_signal(SIGHUP, SIG_IGN);
 552       safe_signal(SIGINT, SIG_IGN);
 553       safe_signal(SIGQUIT, SIG_IGN);
 554    }
 555    save_mbox_for_possible_quitstuff();
 556    quit();
 557 jleave:
 558    NYD_LEAVE;
 559    return exit_status;
 560 }
 561
 562 static void
 563 _hdrstop(int signo)
 564 {
 565    NYD_X; /* Signal handler */
 566    UNUSED(signo);
 567
 568    fflush(stdout);
 569    fprintf(stderr, tr(141, "\nInterrupt\n"));
 570    siglongjmp(__hdrjmp, 1);
 571 }
 572
 573 int
 574 main(int argc, char *argv[])
 575 {
 576    static char const optstr[] = "A:a:Bb:c:DdEeFfHiL:NnO:q:Rr:S:s:tu:Vv~#",
 577       usagestr[] =
 578          "Synopsis:\n"
 579          "  %s [-BDdEFintv~] [-A acc] [-a attachment] "
 580             "[-b bcc-addr] [-c cc-addr]\n"
 581          "\t  [-O mtaopt [-O mtaopt-arg]] [-q file] [-r from-addr] "
 582             "[-S var[=value]]\n"
 583          "\t  [-s subject] to-addr...\n"
 584          "  %s [-BDdEeHiNnRv~#] [-A acc] [-L spec-list] [-S var[=value]] "
 585             "-f [file]\n"
 586          "  %s [-BDdEeHiNnRv~#] [-A acc] [-L spec-list] [-S var[=value]] "
 587             "[-u user]\n";
 588
 589    struct a_arg *a_head = NULL, *a_curr = /* silence CC */ NULL;
 590    struct name *to = NULL, *cc = NULL, *bcc = NULL;
 591    struct attachment *attach = NULL;
 592    char *cp = NULL, *subject = NULL, *qf = NULL, *Aarg = NULL, *Larg = NULL;
 593    char const *okey, **oargs = NULL, *folder = NULL;
 594    size_t oargs_size = 0, oargs_count = 0, smopts_size = 0;
 595    int i;
 596    NYD_ENTER;
 597
 598    /*
 599     * Start our lengthy setup
 600     */
 601
 602    starting =
 603    var_clear_allow_undefined = TRU1;
 604
 605    progname = argv[0];
 606    _startup();
 607
 608    /* Command line parsing */
 609    while ((i = _getopt(argc, argv, optstr)) >= 0) {
 610       switch (i) {
 611       case 'A':
 612          /* Execute an account command later on */
 613          Aarg = _oarg;
 614          break;
 615       case 'a':
 616          {  struct a_arg *nap = ac_alloc(sizeof(struct a_arg));
 617             if (a_head == NULL)
 618                a_head = nap;
 619             else
 620                a_curr->aa_next = nap;
 621             nap->aa_next = NULL;
 622             nap->aa_file = _oarg;
 623             a_curr = nap;
 624          }
 625          options |= OPT_SENDMODE;
 626          break;
 627       case 'B':
 628          /* Make 0/1 line buffered */
 629          setvbuf(stdin, NULL, _IOLBF, 0);
 630          setvbuf(stdout, NULL, _IOLBF, 0);
 631          break;
 632       case 'b':
 633          /* Get Blind Carbon Copy Recipient list */
 634          bcc = cat(bcc, checkaddrs(lextract(_oarg, GBCC | GFULL)));
 635          options |= OPT_SENDMODE;
 636          break;
 637       case 'c':
 638          /* Get Carbon Copy Recipient list */
 639          cc = cat(cc, checkaddrs(lextract(_oarg, GCC | GFULL)));
 640          options |= OPT_SENDMODE;
 641          break;
 642       case 'D':
 643 #ifdef HAVE_IMAP
 644          okey = "disconnected";
 645          goto joarg;
 646 #else
 647          break;
 648 #endif
 649       case 'd':
 650          okey = "debug";
 651 #ifdef HAVE_DEBUG
 652          ok_bset(debug, TRU1);
 653 #endif
 654          goto joarg;
 655       case 'E':
 656          okey = "skipemptybody";
 657          goto joarg;
 658       case 'e':
 659          options |= OPT_EXISTONLY;
 660          break;
 661       case 'F':
 662          options |= OPT_F_FLAG | OPT_SENDMODE;
 663          break;
 664       case 'f':
 665          /* User is specifying file to "edit" with Mail, as opposed to reading
 666           * system mailbox.  If no argument is given, we read his mbox file.
 667           * Check for remaining arguments later */
 668          folder = "&";
 669          break;
 670       case 'H':
 671          options |= OPT_HEADERSONLY;
 672          break;
 673       case 'i':
 674          /* Ignore interrupts */
 675          okey = "ignore";
 676          goto joarg;
 677       case 'L':
 678          Larg = optarg;
 679          if (*Larg == '"' || *Larg == '\'') { /* TODO list.c:listspec_check() */
 680             size_t j = strlen(++Larg);
 681             if (j > 0)
 682                Larg[j - 1] = '\0';
 683          }
 684          options |= OPT_HEADERLIST;
 685          break;
 686       case 'N':
 687          /* Avoid initial header printing */
 688          okey = "noheader";
 689          goto joarg;
 690       case 'n':
 691          /* Don't source "unspecified system start-up file" */
 692          options |= OPT_NOSRC;
 693          break;
 694       case 'O':
 695          /* Additional options to pass-through to MTA */
 696          if (smopts_count == (size_t)smopts_size)
 697             smopts_size = _grow_cpp(&smopts, smopts_size + 8, smopts_count);
 698          smopts[smopts_count++] = skin(_oarg);
 699          break;
 700       case 'q':
 701          /* Quote file TODO drop? -Q with real quote?? what ? */
 702          if (*_oarg != '-')
 703             qf = _oarg;
 704          options |= OPT_SENDMODE;
 705          break;
 706       case 'R':
 707          /* Open folders read-only */
 708          options |= OPT_R_FLAG;
 709          break;
 710       case 'r':
 711          /* Set From address. */
 712          options |= OPT_r_FLAG;
 713          if ((option_r_arg = _oarg)[0] != '\0') {
 714             struct name *fa = nalloc(_oarg, GFULL);
 715
 716             if (is_addr_invalid(fa, 1) || is_fileorpipe_addr(fa)) {
 717                fprintf(stderr, tr(271, "Invalid address argument with -r\n"));
 718                goto jusage;
 719             }
 720             option_r_arg = fa->n_name;
 721             /* TODO -r options is set in smopts, but may
 722              * TODO be overwritten by setting from= in
 723              * TODO an interactive session!
 724              * TODO Maybe disable setting of from?
 725              * TODO Warn user?  Update manual!! */
 726             okey = savecat("from=", fa->n_fullname);
 727             goto joarg;
 728             /* ..and fa goes even though it is ready :/ */
 729          }
 730          break;
 731       case 'S':
 732          /* Set variable.  We need to do this twice, since the user surely
 733           * wants the setting to take effect immediately, but also doesn't want
 734           * it to be overwritten from within resource files */
 735          {  char *a[2];
 736             okey = a[0] = _oarg;
 737             a[1] = NULL;
 738             c_set(a);
 739          }
 740 joarg:
 741          if (oargs_count == oargs_size)
 742             oargs_size = _grow_cpp(&oargs, oargs_size + 8, oargs_count);
 743          oargs[oargs_count++] = okey;
 744          break;
 745       case 's':
 746          /* Subject: */
 747          subject = _oarg;
 748          options |= OPT_SENDMODE;
 749          break;
 750       case 't':
 751          /* Read defined set of headers from mail to be send */
 752          options |= OPT_SENDMODE | OPT_t_FLAG;
 753          break;
 754       case 'u':
 755          /* Set user name to pretend to be; don't set OPT_u_FLAG yet, this is
 756           * done as necessary in _setup_vars() above */
 757          myname = _oarg;
 758          break;
 759       case 'V':
 760          puts(version);
 761          exit(0);
 762          /* NOTREACHED */
 763       case 'v':
 764          /* Be verbose */
 765          okey = "verbose";
 766 #ifdef HAVE_DEBUG
 767          ok_bset(verbose, TRU1);
 768 #endif
 769          goto joarg;
 770       case '~':
 771          /* Enable tilde escapes even in non-interactive mode */
 772          options |= OPT_TILDE_FLAG;
 773          break;
 774       case '#':
 775          /* Work in batch mode, even if non-interactive */
 776          if (oargs_count + 6 >= oargs_size)
 777             oargs_size = _grow_cpp(&oargs, oargs_size + 8, oargs_count);
 778          oargs[oargs_count + 0] = "dot";
 779          oargs[oargs_count + 1] = "emptystart";
 780          oargs[oargs_count + 2] = "noheader";
 781          oargs[oargs_count + 3] = "quiet";
 782          oargs[oargs_count + 4] = "sendwait";
 783          oargs[oargs_count + 5] = "MBOX=/dev/null";
 784          oargs_count += 6;
 785          folder = "/dev/null";
 786          options |= OPT_TILDE_FLAG | OPT_BATCH_FLAG;
 787          break;
 788       case '?':
 789 jusage:
 790          fprintf(stderr, tr(135, usagestr), progname, progname, progname);
 791          exit_status = EXIT_USE;
 792          goto jleave;
 793       }
 794    }
 795
 796    if (folder != NULL) {
 797       if (_oind < argc) {
 798          if (_oind + 1 < argc) {
 799             fprintf(stderr, tr(205, "More than one file given with -f\n"));
 800             goto jusage;
 801          }
 802          folder = argv[_oind];
 803       }
 804    } else {
 805       for (i = _oind; argv[i]; ++i)
 806          to = cat(to, checkaddrs(lextract(argv[i], GTO | GFULL)));
 807       if (to != NULL)
 808          options |= OPT_SENDMODE;
 809    }
 810
 811    /* Check for inconsistent arguments */
 812    if (options & OPT_SENDMODE) {
 813       if (folder != NULL) {
 814          fprintf(stderr, tr(137, "Cannot give -f and people to send to.\n"));
 815          goto jusage;
 816       }
 817       if (myname != NULL) {
 818          fprintf(stderr, tr(568,
 819             "The -u option cannot be used in send mode\n"));
 820          goto jusage;
 821       }
 822       if (!(options & OPT_t_FLAG) && to == NULL) {
 823          fprintf(stderr, tr(138,
 824             "Send options without primary recipient specified.\n"));
 825          goto jusage;
 826       }
 827       if (options & (OPT_HEADERSONLY | OPT_HEADERLIST)) {
 828          fprintf(stderr, tr(45,
 829             "The -H and -L options cannot be used in send mode.\n"));
 830          goto jusage;
 831       }
 832       if (options & OPT_R_FLAG) {
 833          fprintf(stderr,
 834             tr(235, "The -R option is meaningless in send mode.\n"));
 835          goto jusage;
 836       }
 837    } else {
 838       if (folder != NULL && myname != NULL) {
 839          fprintf(stderr, tr(569,
 840             "The options -f and -u are mutually exclusive\n"));
 841          goto jusage;
 842       }
 843    }
 844
 845    /*
 846     * Likely to go, perform more setup
 847     */
 848
 849    _setup_vars();
 850
 851    if (options & OPT_INTERACTIVE) {
 852       _setscreensize(0);
 853 #ifdef SIGWINCH
 854 # ifndef TTY_WANTS_SIGWINCH
 855       if (safe_signal(SIGWINCH, SIG_IGN) != SIG_IGN)
 856 # endif
 857          safe_signal(SIGWINCH, _setscreensize);
 858 #endif
 859    } else
 860       scrnheight = realscreenheight = 24, scrnwidth = 80;
 861
 862    /* Snapshot our string pools.  Memory is auto-reclaimed from now on */
 863    spreserve();
 864
 865    if (!(options & OPT_NOSRC) && getenv("NAIL_NO_SYSTEM_RC") == NULL)
 866       load(SYSCONFRC);
 867    /* *expand() returns a savestr(), but load only uses the file name for
 868     * fopen(), so it's safe to do this */
 869    if ((cp = getenv("MAILRC")) == NULL && (cp = getenv("NAILRC")) == NULL)
 870       cp = UNCONST(MAILRC);
 871    load(file_expand(cp));
 872    if (getenv("NAIL_EXTRA_RC") == NULL &&
 873          (cp = ok_vlook(NAIL_EXTRA_RC)) != NULL)
 874       load(file_expand(cp));
 875
 876    /* Now we can set the account */
 877    if (Aarg != NULL) {
 878       char *a[2];
 879       a[0] = Aarg;
 880       a[1] = NULL;
 881       c_account(a);
 882    }
 883
 884    /* Ensure the -S and other command line options take precedence over
 885     * anything that may have been placed in resource files */
 886    for (i = 0; UICMP(z, i, <, oargs_count); ++i) {
 887       char const *a[2];
 888       a[0] = oargs[i];
 889       a[1] = NULL;
 890       c_set(a);
 891    }
 892
 893    /*
 894     * We're finally completely setup and ready to go
 895     */
 896
 897    starting =
 898    var_clear_allow_undefined = FAL0;
 899
 900    if (options & OPT_DEBUG)
 901       fprintf(stderr, tr(199, "user = %s, homedir = %s\n"), myname, homedir);
 902
 903    if (!(options & OPT_SENDMODE)) {
 904       exit_status = _rcv_mode(folder, Larg);
 905       goto jleave;
 906    }
 907
 908    /* Now that full mailx(1)-style file expansion is possible handle the
 909     * attachments which we had delayed due to this.
 910     * This may use savestr(), but since we won't enter the command loop we
 911     * don't need to care about that */
 912    while (a_head != NULL) {
 913       attach = add_attachment(attach, a_head->aa_file, NULL);
 914       if (attach != NULL) {
 915          a_curr = a_head;
 916          a_head = a_head->aa_next;
 917          ac_free(a_curr);
 918       } else {
 919          perror(a_head->aa_file);
 920          exit_status = EXIT_ERR;
 921          goto jleave;
 922       }
 923    }
 924
 925    /* xxx exit_status = EXIT_OK; */
 926    if (options & OPT_INTERACTIVE)
 927       tty_init();
 928    mail(to, cc, bcc, subject, attach, qf, ((options & OPT_F_FLAG) != 0));
 929    if (options & OPT_INTERACTIVE)
 930       tty_destroy();
 931 jleave:
 932    NYD_LEAVE;
 933    return exit_status;
 934 }
 935
 936 /* vim:set fenc=utf-8:s-it-mode */