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);
 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    int rv = -1, colon;
 169    char const *curp;
 170    NYD_ENTER;
 171
 172    if ((colon = (optstring[0] == ':')))
 173       ++optstring;
 174    if (lastp != NULL) {
 175       curp = lastp;
 176       lastp = 0;
 177    } else {
 178       if (_oind >= argc || argv[_oind] == 0 || argv[_oind][0] != '-' ||
 179             argv[_oind][1] == '\0')
 180          goto jleave;
 181       if (argv[_oind][1] == '-' && argv[_oind][2] == '\0') {
 182          ++_oind;
 183          goto jleave;
 184       }
 185       curp = &argv[_oind][1];
 186    }
 187
 188    _oopt = curp[0];
 189    while (optstring[0] != '\0') {
 190       if (optstring[0] == ':' || optstring[0] != _oopt) {
 191          ++optstring;
 192          continue;
 193       }
 194       if (optstring[1] == ':') {
 195          if (curp[1] != '\0') {
 196             _oarg = UNCONST(&curp[1]);
 197             ++_oind;
 198          } else {
 199             if ((_oind += 2) > argc) {
 200                if (!colon /*&& _oerr*/) {
 201                   fprintf(stderr,
 202                      tr(79, "%s: option requires an argument -- %c\n"),
 203                      argv[0], (char)_oopt);
 204                }
 205                rv = (colon ? ':' : '?');
 206                goto jleave;
 207             }
 208             _oarg = argv[_oind - 1];
 209          }
 210       } else {
 211          if (curp[1] != '\0')
 212             lastp = &curp[1];
 213          else
 214             ++_oind;
 215          _oarg = NULL;
 216       }
 217       rv = _oopt;
 218       goto jleave;
 219    }
 220
 221    if (!colon /*&& opterr*/)
 222       fprintf(stderr, tr(78, "%s: illegal option -- %c\n"), argv[0], _oopt);
 223    if (curp[1] != '\0')
 224       lastp = &curp[1];
 225    else
 226       ++_oind;
 227    _oarg = 0;
 228    rv = '?';
 229 jleave:
 230    NYD_LEAVE;
 231    return rv;
 232 }
 233 #endif /* !HAVE_GETOPT */
 234
 235 static void
 236 _startup(void)
 237 {
 238    char *cp;
 239    NYD_ENTER;
 240
 241    /* Absolutely the first thing we do is save our egid and set it to the rgid,
 242     * so that we can safely run setgid.  We use the sgid (saved set-gid) to
 243     * allow ourselves to revert to the egid if we want (temporarily) to become
 244     * privileged XXX (s-nail-)*dotlock(-program)* [maybe forked<->Unix IPC?] */
 245    effectivegid = getegid();
 246    realgid = getgid();
 247    if (setgid(realgid) < 0) {
 248       perror("setgid");
 249       exit(1);
 250    }
 251
 252    image = -1;
 253    dflpipe = SIG_DFL;
 254 #ifndef HAVE_GETOPT
 255    _oind = /*_oerr =*/ 1;
 256 #endif
 257
 258    if ((cp = strrchr(progname, '/')) != NULL)
 259       progname = ++cp;
 260
 261    /* Set up a reasonable environment.
 262     * Figure out whether we are being run interactively,
 263     * start the SIGCHLD catcher, and so forth */
 264    safe_signal(SIGCHLD, &sigchild);
 265 #ifdef HAVE_DEBUG
 266    safe_signal(SIGABRT, &_nyd_oncrash);
 267 # ifdef SIGBUS
 268    safe_signal(SIGBUS, &_nyd_oncrash);
 269 # endif
 270    safe_signal(SIGFPE, &_nyd_oncrash);
 271    safe_signal(SIGILL, &_nyd_oncrash);
 272    safe_signal(SIGSEGV, &_nyd_oncrash);
 273 #endif
 274
 275    if (isatty(STDIN_FILENO)) /* TODO should be isatty(0) && isatty(2)?? */
 276       options |= OPT_TTYIN | OPT_INTERACTIVE;
 277    if (isatty(STDOUT_FILENO))
 278       options |= OPT_TTYOUT;
 279    if (IS_TTY_SESSION())
 280       safe_signal(SIGPIPE, dflpipe = SIG_IGN);
 281
 282    /* Define defaults for internal variables, based on POSIX 2008/Cor 1-2013 */
 283    /* noallnet */
 284    /* noappend */
 285    ok_bset(asksub, TRU1);
 286    /* noaskbcc */
 287    /* noaskcc */
 288    /* noautoprint */
 289    /* nobang */
 290    /* nocmd */
 291    /* nocrt */
 292    /* nodebug */
 293    /* nodot */
 294    /* ok_vset(escape, ESCAPE *"~"*); TODO non-compliant */
 295    /* noflipr */
 296    /* nofolder */
 297    ok_bset(header, TRU1);
 298    /* nohold */
 299    /* noignore */
 300    /* noignoreeof */
 301    /* nokeep */
 302    /* nokeepsave */
 303    /* nometoo */
 304    /* noonehop -- Note: we ignore this one */
 305    /* nooutfolder */
 306    /* nopage */
 307    ok_vset(prompt, "\\& "); /* POSIX "? " unless *bsdcompat*, then "& " */
 308    /* noquiet */
 309    /* norecord */
 310    ok_bset(save, TRU1);
 311    /* nosendwait */
 312    /* noshowto */
 313    /* nosign */
 314    /* noSign */
 315    /* ok_vset(toplines, "5"); XXX somewhat hmm */
 316
 317 #ifdef HAVE_SETLOCALE
 318    setlocale(LC_ALL, "");
 319    mb_cur_max = MB_CUR_MAX;
 320 # ifdef HAVE_NL_LANGINFO
 321    if (ok_vlook(ttycharset) == NULL && (cp = nl_langinfo(CODESET)) != NULL)
 322       ok_vset(ttycharset, cp);
 323 # endif
 324
 325 # ifdef HAVE_C90AMEND1
 326    if (mb_cur_max > 1) {
 327       wchar_t  wc;
 328       if (mbtowc(&wc, "\303\266", 2) == 2 && wc == 0xF6 &&
 329             mbtowc(&wc, "\342\202\254", 3) == 3 && wc == 0x20AC)
 330          utf8 = 1;
 331       /* Reset possibly messed up state; luckily this also gives us an
 332        * indication wether the encoding has locking shift state sequences */
 333       /* TODO temporary - use option bits! */
 334       enc_has_state = mbtowc(&wc, NULL, mb_cur_max);
 335    }
 336 # endif
 337 #else
 338    mb_cur_max = 1;
 339 #endif
 340
 341 #ifdef HAVE_CATGETS
 342 # ifdef NL_CAT_LOCALE
 343    catd = catopen(CATNAME, NL_CAT_LOCALE);
 344 # else
 345    catd = catopen(CATNAME, 0);
 346 # endif
 347 #endif
 348
 349 #ifdef HAVE_ICONV
 350    iconvd = (iconv_t)-1;
 351 #endif
 352    NYD_LEAVE;
 353 }
 354
 355 static size_t
 356 _grow_cpp(char const ***cpp, size_t newsize, size_t oldcnt)
 357 {
 358    /* Before spreserve(): use our string pool instead of LibC heap */
 359    char const **newcpp;
 360    NYD_ENTER;
 361
 362    newcpp = salloc(sizeof(char*) * newsize);
 363
 364    if (oldcnt > 0)
 365       memcpy(newcpp, *cpp, oldcnt * sizeof(char*));
 366    *cpp = newcpp;
 367    NYD_LEAVE;
 368    return newsize;
 369 }
 370
 371 static void
 372 _setup_vars(void)
 373 {
 374    /* Before spreserve(): use our string pool instead of LibC heap */
 375    /* XXX further check paths? */
 376    char const *cp;
 377    uid_t uid;
 378    struct passwd *pwuid, *pw;
 379    NYD_ENTER;
 380
 381    tempdir = ((cp = getenv("TMPDIR")) != NULL) ? savestr(cp) : TMPDIR_FALLBACK;
 382
 383    cp = (myname == NULL) ? getenv("USER") : myname;
 384    uid = getuid();
 385    if ((pwuid = getpwuid(uid)) == NULL)
 386       panic(tr(201, "Cannot associate a name with uid %lu"), (ul_it)uid);
 387    if (cp == NULL)
 388       myname = pwuid->pw_name;
 389    else if ((pw = getpwnam(cp)) == NULL)
 390       panic(tr(236, "`%s' is not a user of this system"), cp);
 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    if ((cp = getenv("HOME")) == NULL)
 400       cp = "."; /* XXX User and Login objects; Login: pw->pw_dir */
 401    homedir = savestr(cp);
 402    NYD_LEAVE;
 403 }
 404
 405 static void
 406 _setscreensize(int is_sighdl)
 407 {
 408    struct termios tbuf;
 409 #ifdef TIOCGWINSZ
 410    struct winsize ws;
 411 #elif defined TIOCGSIZE
 412    struct ttysize ts;
 413 #endif
 414    NYD_ENTER;
 415
 416    scrnheight = realscreenheight = scrnwidth = 0;
 417
 418    /* (Also) POSIX: LINES and COLUMNS always override.  Adjust this
 419     * a little bit to be able to honour resizes during our lifetime and
 420     * only honour it upon first run; abuse *is_sighdl* as an indicator */
 421    if (!is_sighdl) {
 422       char *cp;
 423       long i;
 424
 425       if ((cp = getenv("LINES")) != NULL && (i = strtol(cp, NULL, 10)) > 0)
 426          scrnheight = realscreenheight = (int)i;
 427       if ((cp = getenv("COLUMNS")) != NULL && (i = strtol(cp, NULL, 10)) > 0)
 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) < 0)
 436       ws.ws_col = ws.ws_row = 0;
 437 #elif defined TIOCGSIZE
 438    if (ioctl(STDOUT_FILENO, TIOCGSIZE, &ws) < 0)
 439       ts.ts_lines = ts.ts_cols = 0;
 440 #endif
 441
 442    if (scrnheight == 0) {
 443       speed_t ospeed = ((tcgetattr(STDOUT_FILENO, &tbuf) < 0)
 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)
 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    i = setfile(folder, 0);
 509    if (i < 0)
 510       exit(1); /* error already reported */
 511    if (options & OPT_EXISTONLY)
 512       exit(i);
 513
 514    if (options & OPT_HEADERSONLY) {
 515       print_headers(1, msgCount);
 516       exit(exit_status);
 517    }
 518
 519    callhook(mailname, 0);
 520    if (i > 0 && !ok_blook(emptystart))
 521       exit(1);
 522
 523    if (sigsetjmp(__hdrjmp, 1) == 0) {
 524       if ((prevint = safe_signal(SIGINT, SIG_IGN)) != SIG_IGN)
 525          safe_signal(SIGINT, _hdrstop);
 526       if (!(options & OPT_N_FLAG)) {
 527          if (!ok_blook(quiet))
 528             printf(tr(140, "%s version %s.  Type ? for help.\n"),
 529                (ok_blook(bsdcompat) ? "Mail" : uagent), version);
 530          announce(1);
 531          fflush(stdout);
 532       }
 533       safe_signal(SIGINT, prevint);
 534    }
 535
 536    /* Enter the command loop */
 537    if (options & OPT_INTERACTIVE)
 538       tty_init();
 539    commands();
 540    if (options & OPT_INTERACTIVE)
 541       tty_destroy();
 542
 543    if (mb.mb_type == MB_FILE || mb.mb_type == MB_MAILDIR) {
 544       safe_signal(SIGHUP, SIG_IGN);
 545       safe_signal(SIGINT, SIG_IGN);
 546       safe_signal(SIGQUIT, SIG_IGN);
 547    }
 548    save_mbox_for_possible_quitstuff();
 549    quit();
 550    NYD_LEAVE;
 551    return exit_status;
 552 }
 553
 554 static void
 555 _hdrstop(int signo)
 556 {
 557    UNUSED(signo);
 558
 559    fflush(stdout);
 560    fprintf(stderr, tr(141, "\nInterrupt\n"));
 561    siglongjmp(__hdrjmp, 1);
 562 }
 563
 564 int
 565 main(int argc, char *argv[])
 566 {
 567    static char const optstr[] = "A:a:Bb:c:DdEeFfHiNnO:q:Rr:S:s:tu:Vv~#",
 568       usagestr[] =
 569          "Synopsis:\n"
 570          "  %s [-BDdEFintv~] [-A acc] [-a attachment] "
 571             "[-b bcc-addr] [-c cc-addr]\n"
 572          "\t  [-O mtaopt [-O mtaopt-arg]] [-q file] [-r from-addr] "
 573             "[-S var[=value]]\n"
 574          "\t  [-s subject] to-addr...\n"
 575          "  %s [-BDdEeHiNnRv~#] [-A acct] "
 576             "[-S var[=value]] -f [file]\n"
 577          "  %s [-BDdEeiNnRv~#] [-A acc] [-S var[=value]] [-u user]\n";
 578
 579    struct a_arg *a_head = NULL, *a_curr = /* silence CC */ NULL;
 580    struct name *to = NULL, *cc = NULL, *bcc = NULL;
 581    struct attachment *attach = NULL;
 582    char *cp = NULL, *subject = NULL, *qf = NULL, *Aflag = NULL;
 583    char const *okey, **oargs = NULL, *folder = NULL;
 584    size_t oargs_size = 0, oargs_count = 0, smopts_size = 0;
 585    int i;
 586    NYD_ENTER;
 587
 588    /*
 589     * Start our lengthy setup
 590     */
 591
 592    starting =
 593    var_clear_allow_undefined = TRU1;
 594
 595    progname = argv[0];
 596    _startup();
 597
 598    /* Command line parsing */
 599    while ((i = _getopt(argc, argv, optstr)) >= 0) {
 600       switch (i) {
 601       case 'A':
 602          /* Execute an account command later on */
 603          Aflag = _oarg;
 604          break;
 605       case 'a':
 606          {  struct a_arg *nap = ac_alloc(sizeof(struct a_arg));
 607             if (a_head == NULL)
 608                a_head = nap;
 609             else
 610                a_curr->aa_next = nap;
 611             nap->aa_next = NULL;
 612             nap->aa_file = _oarg;
 613             a_curr = nap;
 614          }
 615          options |= OPT_SENDMODE;
 616          break;
 617       case 'B':
 618          /* Make 0/1 line buffered */
 619          setvbuf(stdin, NULL, _IOLBF, 0);
 620          setvbuf(stdout, NULL, _IOLBF, 0);
 621          break;
 622       case 'b':
 623          /* Get Blind Carbon Copy Recipient list */
 624          bcc = cat(bcc, checkaddrs(lextract(_oarg, GBCC | GFULL)));
 625          options |= OPT_SENDMODE;
 626          break;
 627       case 'c':
 628          /* Get Carbon Copy Recipient list */
 629          cc = cat(cc, checkaddrs(lextract(_oarg, GCC | GFULL)));
 630          options |= OPT_SENDMODE;
 631          break;
 632       case 'D':
 633 #ifdef HAVE_IMAP
 634          okey = "disconnected";
 635          goto joarg;
 636 #else
 637          break;
 638 #endif
 639       case 'd':
 640          okey = "debug";
 641 #ifdef HAVE_DEBUG
 642          ok_bset(debug, TRU1);
 643 #endif
 644          goto joarg;
 645       case 'E':
 646          okey = "skipemptybody";
 647          goto joarg;
 648       case 'e':
 649          options |= OPT_EXISTONLY;
 650          break;
 651       case 'F':
 652          options |= OPT_F_FLAG | OPT_SENDMODE;
 653          break;
 654       case 'f':
 655          /* User is specifying file to "edit" with Mail, as opposed to reading
 656           * system mailbox.  If no argument is given, we read his mbox file.
 657           * Check for remaining arguments later */
 658          folder = "&";
 659          break;
 660       case 'H':
 661          options |= OPT_HEADERSONLY;
 662          break;
 663       case 'i':
 664          /* Ignore interrupts */
 665          okey = "ignore";
 666          goto joarg;
 667       case 'N':
 668          /* Avoid initial header printing */
 669          okey = "noheader";
 670          goto joarg;
 671       case 'n':
 672          /* Don't source "unspecified system start-up file" */
 673          options |= OPT_NOSRC;
 674          break;
 675       case 'O':
 676          /* Additional options to pass-through to MTA */
 677          if (smopts_count == (size_t)smopts_size)
 678             smopts_size = _grow_cpp(&smopts, smopts_size + 8, smopts_count);
 679          smopts[smopts_count++] = skin(_oarg);
 680          break;
 681       case 'q':
 682          /* Quote file TODO drop? -Q with real quote?? what ? */
 683          if (*_oarg != '-')
 684             qf = _oarg;
 685          options |= OPT_SENDMODE;
 686          break;
 687       case 'R':
 688          /* Open folders read-only */
 689          options |= OPT_R_FLAG;
 690          break;
 691       case 'r':
 692          /* Set From address. */
 693          options |= OPT_r_FLAG;
 694          if ((option_r_arg = _oarg)[0] != '\0') {
 695             struct name *fa = nalloc(_oarg, GFULL);
 696
 697             if (is_addr_invalid(fa, 1) || is_fileorpipe_addr(fa)) {
 698                fprintf(stderr, tr(271, "Invalid address argument with -r\n"));
 699                goto jusage;
 700             }
 701             option_r_arg = fa->n_name;
 702             /* TODO -r options is set in smopts, but may
 703              * TODO be overwritten by setting from= in
 704              * TODO an interactive session!
 705              * TODO Maybe disable setting of from?
 706              * TODO Warn user?  Update manual!! */
 707             okey = savecat("from=", fa->n_fullname);
 708             goto joarg;
 709             /* ..and fa goes even though it is ready :/ */
 710          }
 711          break;
 712       case 'S':
 713          /* Set variable.  We need to do this twice, since the user surely
 714           * wants the setting to take effect immediately, but also doesn't want
 715           * it to be overwritten from within resource files */
 716          {  char *a[2];
 717             okey = a[0] = _oarg;
 718             a[1] = NULL;
 719             set(a);
 720          }
 721 joarg:
 722          if (oargs_count == oargs_size)
 723             oargs_size = _grow_cpp(&oargs, oargs_size + 8, oargs_count);
 724          oargs[oargs_count++] = okey;
 725          break;
 726       case 's':
 727          /* Subject: */
 728          subject = _oarg;
 729          options |= OPT_SENDMODE;
 730          break;
 731       case 't':
 732          /* Read defined set of headers from mail to be send */
 733          options |= OPT_SENDMODE | OPT_t_FLAG;
 734          break;
 735       case 'u':
 736          /* Set user name to pretend to be; don't set OPT_u_FLAG yet, this is
 737           * done as necessary in _setup_vars() above */
 738          myname = _oarg;
 739          break;
 740       case 'V':
 741          puts(version);
 742          exit(0);
 743          /* NOTREACHED */
 744       case 'v':
 745          /* Be verbose */
 746          okey = "verbose";
 747 #ifdef HAVE_DEBUG
 748          ok_bset(verbose, TRU1);
 749 #endif
 750          goto joarg;
 751       case '~':
 752          /* Enable tilde escapes even in non-interactive mode */
 753          options |= OPT_TILDE_FLAG;
 754          break;
 755       case '#':
 756          /* Work in batch mode, even if non-interactive */
 757          if (oargs_count + 6 >= oargs_size)
 758             oargs_size = _grow_cpp(&oargs, oargs_size + 8, oargs_count);
 759          oargs[oargs_count + 0] = "dot";
 760          oargs[oargs_count + 1] = "emptystart";
 761          oargs[oargs_count + 2] = "noheader";
 762          oargs[oargs_count + 3] = "quiet";
 763          oargs[oargs_count + 4] = "sendwait";
 764          oargs[oargs_count + 5] = "MBOX=/dev/null";
 765          oargs_count += 6;
 766          options |= OPT_TILDE_FLAG | OPT_BATCH_FLAG;
 767          break;
 768       case '?':
 769 jusage:
 770          fprintf(stderr, tr(135, usagestr), progname, progname, progname);
 771          exit(2);
 772       }
 773    }
 774
 775    if (folder != NULL) {
 776       if (_oind < argc) {
 777          if (_oind + 1 < argc) {
 778             fprintf(stderr, tr(205, "More than one file given with -f\n"));
 779             goto jusage;
 780          }
 781          folder = argv[_oind];
 782       }
 783    } else {
 784       for (i = _oind; argv[i]; ++i)
 785          to = cat(to, checkaddrs(lextract(argv[i], GTO | GFULL)));
 786       if (to != NULL)
 787          options |= OPT_SENDMODE;
 788    }
 789
 790    /* Check for inconsistent arguments */
 791    if (folder != NULL && to != NULL) {
 792       fprintf(stderr, tr(137, "Cannot give -f and people to send to.\n"));
 793       goto jusage;
 794    }
 795    if ((options & (OPT_SENDMODE | OPT_t_FLAG)) == OPT_SENDMODE && to == NULL) {
 796       fprintf(stderr, tr(138,
 797          "Send options without primary recipient specified.\n"));
 798       goto jusage;
 799    }
 800    if ((options & OPT_R_FLAG) && to != NULL) {
 801       fprintf(stderr, tr(235, "The -R option is meaningless in send mode.\n"));
 802       goto jusage;
 803    }
 804
 805    /*
 806     * Likely to go, perform more setup
 807     */
 808
 809    _setup_vars();
 810
 811    if (options & OPT_INTERACTIVE) {
 812       _setscreensize(0);
 813 #ifdef SIGWINCH
 814 # ifndef TTY_WANTS_SIGWINCH
 815       if (safe_signal(SIGWINCH, SIG_IGN) != SIG_IGN)
 816 # endif
 817          safe_signal(SIGWINCH, _setscreensize);
 818 #endif
 819    } else
 820       scrnheight = realscreenheight = 24, scrnwidth = 80;
 821
 822    /* Snapshot our string pools.  Memory is auto-reclaimed from now on */
 823    spreserve();
 824
 825    if (!(options & OPT_NOSRC) && getenv("NAIL_NO_SYSTEM_RC") == NULL)
 826       load(SYSCONFRC);
 827    /* *expand() returns a savestr(), but load only uses the file name for
 828     * fopen(), so it's safe to do this */
 829    if ((cp = getenv("MAILRC")) == NULL && (cp = getenv("NAILRC")) == NULL)
 830       cp = UNCONST(MAILRC);
 831    load(file_expand(cp));
 832    if (getenv("NAIL_EXTRA_RC") == NULL &&
 833          (cp = ok_vlook(NAIL_EXTRA_RC)) != NULL)
 834       load(file_expand(cp));
 835
 836    /* Now we can set the account */
 837    if (Aflag != NULL) {
 838       char *a[2];
 839       a[0] = Aflag;
 840       a[1] = NULL;
 841       c_account(a);
 842    }
 843
 844    /* Ensure the -S and other command line options take precedence over
 845     * anything that may have been placed in resource files */
 846    for (i = 0; UICMP(z, i, <, oargs_count); ++i) {
 847       char const *a[2];
 848       a[0] = oargs[i];
 849       a[1] = NULL;
 850       set(a);
 851    }
 852
 853    /*
 854     * We're finally completely setup and ready to go
 855     */
 856
 857    starting =
 858    var_clear_allow_undefined = FAL0;
 859
 860    if (options & OPT_DEBUG)
 861       fprintf(stderr, tr(199, "user = %s, homedir = %s\n"), myname, homedir);
 862
 863    if (!(options & OPT_SENDMODE)) {
 864       exit_status = _rcv_mode(folder);
 865       goto jleave;
 866    }
 867
 868    /* Now that full mailx(1)-style file expansion is possible handle the
 869     * attachments which we had delayed due to this.
 870     * This may use savestr(), but since we won't enter the command loop we
 871     * don't need to care about that */
 872    while (a_head != NULL) {
 873       attach = add_attachment(attach, a_head->aa_file, NULL);
 874       if (attach != NULL) {
 875          a_curr = a_head;
 876          a_head = a_head->aa_next;
 877          ac_free(a_curr);
 878       } else {
 879          perror(a_head->aa_file);
 880          exit(1);
 881       }
 882    }
 883
 884    /* xxx exit_status = EXIT_OK; */
 885    if (options & OPT_INTERACTIVE)
 886       tty_init();
 887    mail(to, cc, bcc, subject, attach, qf, ((options & OPT_F_FLAG) != 0));
 888    if (options & OPT_INTERACTIVE)
 889       tty_destroy();
 890 jleave:
 891    NYD_LEAVE;
 892    return exit_status;
 893 }
 894
 895 /* vim:set fenc=utf-8:s-it-mode */