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) == -1) {
 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
 264 #ifdef HAVE_DEBUG
 265    safe_signal(SIGABRT, &_nyd_oncrash);
 266 # ifdef SIGBUS
 267    safe_signal(SIGBUS, &_nyd_oncrash);
 268 # endif
 269    safe_signal(SIGFPE, &_nyd_oncrash);
 270    safe_signal(SIGILL, &_nyd_oncrash);
 271    safe_signal(SIGSEGV, &_nyd_oncrash);
 272 #endif
 273    command_manager_start();
 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) == -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)
 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_status = EXIT_ERR; /* error already reported */
 511       goto jleave;
 512    }
 513    if (options & OPT_EXISTONLY) {
 514       exit_status = i;
 515       goto jleave;
 516    }
 517
 518    if (options & (OPT_HEADERSONLY | OPT_HEADERLIST)) {
 519       print_header_summary(Larg);
 520       goto jleave;
 521    }
 522
 523    callhook(mailname, 0);
 524    if (i > 0 && !ok_blook(emptystart)) {
 525       exit_status = EXIT_ERR;
 526       goto jleave;
 527    }
 528
 529    if (sigsetjmp(__hdrjmp, 1) == 0) {
 530       if ((prevint = safe_signal(SIGINT, SIG_IGN)) != SIG_IGN)
 531          safe_signal(SIGINT, _hdrstop);
 532       if (!(options & OPT_N_FLAG)) {
 533          if (!ok_blook(quiet))
 534             printf(tr(140, "%s version %s.  Type ? for help.\n"),
 535                (ok_blook(bsdcompat) ? "Mail" : uagent), version);
 536          announce(1);
 537          fflush(stdout);
 538       }
 539       safe_signal(SIGINT, prevint);
 540    }
 541
 542    /* Enter the command loop */
 543    if (options & OPT_INTERACTIVE)
 544       tty_init();
 545    commands();
 546    if (options & OPT_INTERACTIVE)
 547       tty_destroy();
 548
 549    if (mb.mb_type == MB_FILE || mb.mb_type == MB_MAILDIR) {
 550       safe_signal(SIGHUP, SIG_IGN);
 551       safe_signal(SIGINT, SIG_IGN);
 552       safe_signal(SIGQUIT, SIG_IGN);
 553    }
 554    save_mbox_for_possible_quitstuff();
 555    quit();
 556 jleave:
 557    NYD_LEAVE;
 558    return exit_status;
 559 }
 560
 561 static void
 562 _hdrstop(int signo)
 563 {
 564    NYD_X; /* Signal handler */
 565    UNUSED(signo);
 566
 567    fflush(stdout);
 568    fprintf(stderr, tr(141, "\nInterrupt\n"));
 569    siglongjmp(__hdrjmp, 1);
 570 }
 571
 572 int
 573 main(int argc, char *argv[])
 574 {
 575    static char const optstr[] = "A:a:Bb:c:DdEeFfHiL:NnO:q:Rr:S:s:tu:Vv~#",
 576       usagestr[] =
 577          "Synopsis:\n"
 578          "  %s [-BDdEFintv~] [-A acc] [-a attachment] "
 579             "[-b bcc-addr] [-c cc-addr]\n"
 580          "\t  [-O mtaopt [-O mtaopt-arg]] [-q file] [-r from-addr] "
 581             "[-S var[=value]]\n"
 582          "\t  [-s subject] to-addr...\n"
 583          "  %s [-BDdEeHiNnRv~#] [-A acc] [-L spec-list] [-S var[=value]] "
 584             "-f [file]\n"
 585          "  %s [-BDdEeHiNnRv~#] [-A acc] [-L spec-list] [-S var[=value]] "
 586             "[-u user]\n";
 587
 588    struct a_arg *a_head = NULL, *a_curr = /* silence CC */ NULL;
 589    struct name *to = NULL, *cc = NULL, *bcc = NULL;
 590    struct attachment *attach = NULL;
 591    char *cp = NULL, *subject = NULL, *qf = NULL, *Aarg = NULL, *Larg = NULL;
 592    char const *okey, **oargs = NULL, *folder = NULL;
 593    size_t oargs_size = 0, oargs_count = 0, smopts_size = 0;
 594    int i;
 595    NYD_ENTER;
 596
 597    /*
 598     * Start our lengthy setup
 599     */
 600
 601    starting =
 602    var_clear_allow_undefined = TRU1;
 603
 604    progname = argv[0];
 605    _startup();
 606
 607    /* Command line parsing */
 608    while ((i = _getopt(argc, argv, optstr)) >= 0) {
 609       switch (i) {
 610       case 'A':
 611          /* Execute an account command later on */
 612          Aarg = _oarg;
 613          break;
 614       case 'a':
 615          {  struct a_arg *nap = ac_alloc(sizeof(struct a_arg));
 616             if (a_head == NULL)
 617                a_head = nap;
 618             else
 619                a_curr->aa_next = nap;
 620             nap->aa_next = NULL;
 621             nap->aa_file = _oarg;
 622             a_curr = nap;
 623          }
 624          options |= OPT_SENDMODE;
 625          break;
 626       case 'B':
 627          /* Make 0/1 line buffered */
 628          setvbuf(stdin, NULL, _IOLBF, 0);
 629          setvbuf(stdout, NULL, _IOLBF, 0);
 630          break;
 631       case 'b':
 632          /* Get Blind Carbon Copy Recipient list */
 633          bcc = cat(bcc, checkaddrs(lextract(_oarg, GBCC | GFULL)));
 634          options |= OPT_SENDMODE;
 635          break;
 636       case 'c':
 637          /* Get Carbon Copy Recipient list */
 638          cc = cat(cc, checkaddrs(lextract(_oarg, GCC | GFULL)));
 639          options |= OPT_SENDMODE;
 640          break;
 641       case 'D':
 642 #ifdef HAVE_IMAP
 643          okey = "disconnected";
 644          goto joarg;
 645 #else
 646          break;
 647 #endif
 648       case 'd':
 649          okey = "debug";
 650 #ifdef HAVE_DEBUG
 651          ok_bset(debug, TRU1);
 652 #endif
 653          goto joarg;
 654       case 'E':
 655          okey = "skipemptybody";
 656          goto joarg;
 657       case 'e':
 658          options |= OPT_EXISTONLY;
 659          break;
 660       case 'F':
 661          options |= OPT_F_FLAG | OPT_SENDMODE;
 662          break;
 663       case 'f':
 664          /* User is specifying file to "edit" with Mail, as opposed to reading
 665           * system mailbox.  If no argument is given, we read his mbox file.
 666           * Check for remaining arguments later */
 667          folder = "&";
 668          break;
 669       case 'H':
 670          options |= OPT_HEADERSONLY;
 671          break;
 672       case 'i':
 673          /* Ignore interrupts */
 674          okey = "ignore";
 675          goto joarg;
 676       case 'L':
 677          Larg = optarg;
 678          if (*Larg == '"' || *Larg == '\'') { /* TODO list.c:listspec_check() */
 679             size_t j = strlen(++Larg);
 680             if (j > 0)
 681                Larg[j - 1] = '\0';
 682          }
 683          options |= OPT_HEADERLIST;
 684          break;
 685       case 'N':
 686          /* Avoid initial header printing */
 687          okey = "noheader";
 688          goto joarg;
 689       case 'n':
 690          /* Don't source "unspecified system start-up file" */
 691          options |= OPT_NOSRC;
 692          break;
 693       case 'O':
 694          /* Additional options to pass-through to MTA */
 695          if (smopts_count == (size_t)smopts_size)
 696             smopts_size = _grow_cpp(&smopts, smopts_size + 8, smopts_count);
 697          smopts[smopts_count++] = skin(_oarg);
 698          break;
 699       case 'q':
 700          /* Quote file TODO drop? -Q with real quote?? what ? */
 701          if (*_oarg != '-')
 702             qf = _oarg;
 703          options |= OPT_SENDMODE;
 704          break;
 705       case 'R':
 706          /* Open folders read-only */
 707          options |= OPT_R_FLAG;
 708          break;
 709       case 'r':
 710          /* Set From address. */
 711          options |= OPT_r_FLAG;
 712          if ((option_r_arg = _oarg)[0] != '\0') {
 713             struct name *fa = nalloc(_oarg, GFULL);
 714
 715             if (is_addr_invalid(fa, 1) || is_fileorpipe_addr(fa)) {
 716                fprintf(stderr, tr(271, "Invalid address argument with -r\n"));
 717                goto jusage;
 718             }
 719             option_r_arg = fa->n_name;
 720             /* TODO -r options is set in smopts, but may
 721              * TODO be overwritten by setting from= in
 722              * TODO an interactive session!
 723              * TODO Maybe disable setting of from?
 724              * TODO Warn user?  Update manual!! */
 725             okey = savecat("from=", fa->n_fullname);
 726             goto joarg;
 727             /* ..and fa goes even though it is ready :/ */
 728          }
 729          break;
 730       case 'S':
 731          /* Set variable.  We need to do this twice, since the user surely
 732           * wants the setting to take effect immediately, but also doesn't want
 733           * it to be overwritten from within resource files */
 734          {  char *a[2];
 735             okey = a[0] = _oarg;
 736             a[1] = NULL;
 737             c_set(a);
 738          }
 739 joarg:
 740          if (oargs_count == oargs_size)
 741             oargs_size = _grow_cpp(&oargs, oargs_size + 8, oargs_count);
 742          oargs[oargs_count++] = okey;
 743          break;
 744       case 's':
 745          /* Subject: */
 746          subject = _oarg;
 747          options |= OPT_SENDMODE;
 748          break;
 749       case 't':
 750          /* Read defined set of headers from mail to be send */
 751          options |= OPT_SENDMODE | OPT_t_FLAG;
 752          break;
 753       case 'u':
 754          /* Set user name to pretend to be; don't set OPT_u_FLAG yet, this is
 755           * done as necessary in _setup_vars() above */
 756          myname = _oarg;
 757          break;
 758       case 'V':
 759          puts(version);
 760          exit(0);
 761          /* NOTREACHED */
 762       case 'v':
 763          /* Be verbose */
 764          okey = "verbose";
 765 #ifdef HAVE_DEBUG
 766          ok_bset(verbose, TRU1);
 767 #endif
 768          goto joarg;
 769       case '~':
 770          /* Enable tilde escapes even in non-interactive mode */
 771          options |= OPT_TILDE_FLAG;
 772          break;
 773       case '#':
 774          /* Work in batch mode, even if non-interactive */
 775          if (oargs_count + 6 >= oargs_size)
 776             oargs_size = _grow_cpp(&oargs, oargs_size + 8, oargs_count);
 777          oargs[oargs_count + 0] = "dot";
 778          oargs[oargs_count + 1] = "emptystart";
 779          oargs[oargs_count + 2] = "noheader";
 780          oargs[oargs_count + 3] = "quiet";
 781          oargs[oargs_count + 4] = "sendwait";
 782          oargs[oargs_count + 5] = "MBOX=/dev/null";
 783          oargs_count += 6;
 784          folder = "/dev/null";
 785          options |= OPT_TILDE_FLAG | OPT_BATCH_FLAG;
 786          break;
 787       case '?':
 788 jusage:
 789          fprintf(stderr, tr(135, usagestr), progname, progname, progname);
 790          exit_status = EXIT_USE;
 791          goto jleave;
 792       }
 793    }
 794
 795    /* OPT_BATCH_FLAG sets to /dev/null, but -f can still be used and sets & */
 796    if (folder != NULL && folder[1] == '\0') {
 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 && !(options & OPT_BATCH_FLAG)) {
 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 */