main.c

   1 /*@ S-nail - a mail user agent derived from Berkeley Mail.
   2  *@ Startup -- interface with user.
   3  *@ This file is also used to materialize externals.
   4  *
   5  * Copyright (c) 2000-2004 Gunnar Ritter, Freiburg i. Br., Germany.
   6  * Copyright (c) 2012 - 2014 Steffen (Daode) Nurpmeso <sdaoden@users.sf.net>.
   7  */
   8 /*
   9  * Copyright (c) 1980, 1993
  10  * The Regents of the University of California.  All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  * 3. All advertising materials mentioning features or use of this software
  21  *    must display the following acknowledgement:
  22  *    This product includes software developed by the University of
  23  *    California, Berkeley and its contributors.
  24  * 4. Neither the name of the University nor the names of its contributors
  25  *    may be used to endorse or promote products derived from this software
  26  *    without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  38  * SUCH DAMAGE.
  39  */
  40
  41 #ifndef HAVE_AMALGAMATION
  42 # define _MAIN_SOURCE
  43 # include "nail.h"
  44 #endif
  45
  46 #include <sys/ioctl.h>
  47
  48 #include <fcntl.h>
  49 #include <pwd.h>
  50
  51 #ifdef HAVE_NL_LANGINFO
  52 # include <langinfo.h>
  53 #endif
  54 #ifdef HAVE_SETLOCALE
  55 # include <locale.h>
  56 #endif
  57
  58 #include "version.h"
  59
  60 /* Verify that our size_t ZFMT format string has the correct type size */
  61 __ZFMT_CTA();
  62
  63 struct a_arg {
  64    struct a_arg   *aa_next;
  65    char           *aa_file;
  66 };
  67
  68 /* (extern, but not with amalgamation, so define here) */
  69 VL char const        weekday_names[7 + 1][4] = {
  70    "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", ""
  71 };
  72 VL char const        month_names[12 + 1][4] = {
  73    "Jan", "Feb", "Mar", "Apr", "May", "Jun",
  74    "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", ""
  75 };
  76 VL char const        uagent[] = UAGENT;
  77 VL char const        version[] = VERSION;
  78 /*VL char const        features[]; The "feature string" comes from config.h */
  79 VL uc_it const       class_char[] = {
  80 /* 000 nul  001 soh  002 stx  003 etx  004 eot  005 enq  006 ack  007 bel */
  81    C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL,
  82 /* 010 bs   011 ht   012 nl   013 vt   014 np   015 cr   016 so   017 si */
  83    C_CNTRL, C_BLANK, C_WHITE, C_SPACE, C_SPACE, C_SPACE, C_CNTRL, C_CNTRL,
  84 /* 020 dle  021 dc1  022 dc2  023 dc3  024 dc4  025 nak  026 syn  027 etb */
  85    C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL,
  86 /* 030 can  031 em   032 sub  033 esc  034 fs   035 gs   036 rs   037 us */
  87    C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL,
  88 /* 040 sp   041  !   042  "   043  #   044  $   045  %   046  &   047  ' */
  89    C_BLANK, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT,
  90 /* 050  (   051  )   052  *   053  +   054  ,    055  -   056  .   057  / */
  91    C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT,
  92 /* 060  0   061  1   062  2   063  3   064  4   065  5   066  6   067  7 */
  93    C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL,
  94 /* 070  8   071  9   072  :   073  ;   074  <   075  =   076  >   077  ? */
  95    C_DIGIT, C_DIGIT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT,
  96 /* 100  @   101  A   102  B   103  C   104  D   105  E   106  F   107  G */
  97    C_PUNCT, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER,
  98 /* 110  H   111  I   112  J   113  K   114  L   115  M   116  N   117  O */
  99    C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER,
 100 /* 120  P   121  Q   122  R   123  S   124  T   125  U   126  V   127  W */
 101    C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER,
 102 /* 130  X   131  Y   132  Z   133  [   134  \   135  ]   136  ^   137  _ */
 103    C_UPPER, C_UPPER, C_UPPER, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT,
 104 /* 140  `   141  a   142  b   143  c   144  d   145  e   146  f   147  g */
 105    C_PUNCT, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER,
 106 /* 150  h   151  i   152  j   153  k   154  l   155  m   156  n   157  o */
 107    C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER,
 108 /* 160  p   161  q   162  r   163  s   164  t   165  u   166  v   167  w */
 109    C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER,
 110 /* 170  x   171  y   172  z   173  {   174  |   175  }   176  ~   177 del */
 111    C_LOWER, C_LOWER, C_LOWER, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_CNTRL
 112 };
 113
 114 /* getopt(3) fallback implementation */
 115 #ifdef HAVE_GETOPT
 116 # define _oarg       optarg
 117 # define _oind       optind
 118 /*# define _oerr     opterr*/
 119 # define _oopt       optopt
 120 #else
 121 static char          *_oarg;
 122 static int           _oind, /*_oerr,*/ _oopt;
 123 #endif
 124
 125 /* getopt(3) fallback implementation */
 126 #ifdef HAVE_GETOPT
 127 # define _getopt     getopt
 128 #else
 129 static int     _getopt(int argc, char * const argv[], char const *optstring);
 130 #endif
 131
 132 /* Perform basic startup initialization */
 133 static void    _startup(void);
 134
 135 /* Grow a char** */
 136 static size_t  _grow_cpp(char const ***cpp, size_t newsize, size_t oldcnt);
 137
 138 /* Initialize *tempdir*, *myname*, *homedir* */
 139 static void    _setup_vars(void);
 140
 141 /* We're in an interactive session - compute what the screen size for printing
 142  * headers etc. should be; notify tty upon resize if *is_sighdl* is not 0.
 143  * We use the following algorithm for the height:
 144  * If baud rate < 1200, use  9
 145  * If baud rate = 1200, use 14
 146  * If baud rate > 1200, use 24 or ws_row
 147  * Width is either 80 or ws_col */
 148 static void    _setscreensize(int is_sighdl);
 149
 150 /* Ok, we are reading mail.  Decide whether we are editing a mailbox or reading
 151  * the system mailbox, and open up the right stuff */
 152 static int     _rcv_mode(char const *folder, char const *Larg);
 153
 154 /* Interrupt printing of the headers */
 155 static void    _hdrstop(int signo);
 156
 157 #ifndef HAVE_GETOPT
 158 static int
 159 _getopt(int argc, char * const argv[], char const *optstring)
 160 {
 161    static char const *lastp;
 162
 163    int rv = -1, colon;
 164    char const *curp;
 165    NYD_ENTER;
 166
 167    if ((colon = (optstring[0] == ':')))
 168       ++optstring;
 169    if (lastp != NULL) {
 170       curp = lastp;
 171       lastp = 0;
 172    } else {
 173       if (_oind >= argc || argv[_oind] == 0 || argv[_oind][0] != '-' ||
 174             argv[_oind][1] == '\0')
 175          goto jleave;
 176       if (argv[_oind][1] == '-' && argv[_oind][2] == '\0') {
 177          ++_oind;
 178          goto jleave;
 179       }
 180       curp = &argv[_oind][1];
 181    }
 182
 183    _oopt = curp[0];
 184    while (optstring[0] != '\0') {
 185       if (optstring[0] == ':' || optstring[0] != _oopt) {
 186          ++optstring;
 187          continue;
 188       }
 189       if (optstring[1] == ':') {
 190          if (curp[1] != '\0') {
 191             _oarg = UNCONST(curp + 1);
 192             ++_oind;
 193          } else {
 194             if ((_oind += 2) > argc) {
 195                if (!colon /*&& _oerr*/) {
 196                   fprintf(stderr,
 197                      tr(79, "%s: option requires an argument -- %c\n"),
 198                      argv[0], (char)_oopt);
 199                }
 200                rv = (colon ? ':' : '?');
 201                goto jleave;
 202             }
 203             _oarg = argv[_oind - 1];
 204          }
 205       } else {
 206          if (curp[1] != '\0')
 207             lastp = curp + 1;
 208          else
 209             ++_oind;
 210          _oarg = NULL;
 211       }
 212       rv = _oopt;
 213       goto jleave;
 214    }
 215
 216    if (!colon /*&& opterr*/)
 217       fprintf(stderr, tr(78, "%s: illegal option -- %c\n"), argv[0], _oopt);
 218    if (curp[1] != '\0')
 219       lastp = curp + 1;
 220    else
 221       ++_oind;
 222    _oarg = 0;
 223    rv = '?';
 224 jleave:
 225    NYD_LEAVE;
 226    return rv;
 227 }
 228 #endif /* !HAVE_GETOPT */
 229
 230 static void
 231 _startup(void)
 232 {
 233    char *cp;
 234    NYD_ENTER;
 235
 236    /* Absolutely the first thing we do is save our egid and set it to the rgid,
 237     * so that we can safely run setgid.  We use the sgid (saved set-gid) to
 238     * allow ourselves to revert to the egid if we want (temporarily) to become
 239     * privileged XXX (s-nail-)*dotlock(-program)* [maybe forked<->Unix IPC?] */
 240    effectivegid = getegid();
 241    realgid = getgid();
 242    if (setgid(realgid) == -1) {
 243       perror("setgid");
 244       exit(1);
 245    }
 246
 247    image = -1;
 248    dflpipe = SIG_DFL;
 249 #ifndef HAVE_GETOPT
 250    _oind = /*_oerr =*/ 1;
 251 #endif
 252
 253    if ((cp = strrchr(progname, '/')) != NULL)
 254       progname = ++cp;
 255
 256    /* Set up a reasonable environment */
 257
 258 #ifdef HAVE_DEBUG
 259    safe_signal(SIGABRT, &_nyd_oncrash);
 260 # ifdef SIGBUS
 261    safe_signal(SIGBUS, &_nyd_oncrash);
 262 # endif
 263    safe_signal(SIGFPE, &_nyd_oncrash);
 264    safe_signal(SIGILL, &_nyd_oncrash);
 265    safe_signal(SIGSEGV, &_nyd_oncrash);
 266 #endif
 267    command_manager_start();
 268
 269    if (isatty(STDIN_FILENO)) /* TODO should be isatty(0) && isatty(2)?? */
 270       options |= OPT_TTYIN | OPT_INTERACTIVE;
 271    if (isatty(STDOUT_FILENO))
 272       options |= OPT_TTYOUT;
 273    if (IS_TTY_SESSION())
 274       safe_signal(SIGPIPE, dflpipe = SIG_IGN);
 275
 276    /* Define defaults for internal variables, based on POSIX 2008/Cor 1-2013 */
 277    /* noallnet */
 278    /* noappend */
 279    ok_bset(asksub, TRU1);
 280    /* noaskbcc */
 281    /* noaskcc */
 282    /* noautoprint */
 283    /* nobang */
 284    /* nocmd */
 285    /* nocrt */
 286    /* nodebug */
 287    /* nodot */
 288    /* ok_vset(escape, ESCAPE *"~"*); TODO non-compliant */
 289    /* noflipr */
 290    /* nofolder */
 291    ok_bset(header, TRU1);
 292    /* nohold */
 293    /* noignore */
 294    /* noignoreeof */
 295    /* nokeep */
 296    /* nokeepsave */
 297    /* nometoo */
 298    /* noonehop -- Note: we ignore this one */
 299    /* nooutfolder */
 300    /* nopage */
 301    ok_vset(prompt, "\\& "); /* POSIX "? " unless *bsdcompat*, then "& " */
 302    /* noquiet */
 303    /* norecord */
 304    ok_bset(save, TRU1);
 305    /* nosendwait */
 306    /* noshowto */
 307    /* nosign */
 308    /* noSign */
 309    /* ok_vset(toplines, "5"); XXX somewhat hmm */
 310
 311 #ifdef HAVE_SETLOCALE
 312    setlocale(LC_ALL, "");
 313    mb_cur_max = MB_CUR_MAX;
 314 # ifdef HAVE_NL_LANGINFO
 315    if (ok_vlook(ttycharset) == NULL && (cp = nl_langinfo(CODESET)) != NULL)
 316       ok_vset(ttycharset, cp);
 317 # endif
 318
 319 # ifdef HAVE_C90AMEND1
 320    if (mb_cur_max > 1) {
 321       wchar_t  wc;
 322       if (mbtowc(&wc, "\303\266", 2) == 2 && wc == 0xF6 &&
 323             mbtowc(&wc, "\342\202\254", 3) == 3 && wc == 0x20AC)
 324          options |= OPT_UNICODE;
 325       /* Reset possibly messed up state; luckily this also gives us an
 326        * indication wether the encoding has locking shift state sequences */
 327       /* TODO temporary - use option bits! */
 328       enc_has_state = mbtowc(&wc, NULL, mb_cur_max);
 329    }
 330 # endif
 331 #else
 332    mb_cur_max = 1;
 333 #endif
 334
 335 #ifdef HAVE_CATGETS
 336 # ifdef NL_CAT_LOCALE
 337    catd = catopen(CATNAME, NL_CAT_LOCALE);
 338 # else
 339    catd = catopen(CATNAME, 0);
 340 # endif
 341 #endif
 342
 343 #ifdef HAVE_ICONV
 344    iconvd = (iconv_t)-1;
 345 #endif
 346    NYD_LEAVE;
 347 }
 348
 349 static size_t
 350 _grow_cpp(char const ***cpp, size_t newsize, size_t oldcnt)
 351 {
 352    /* Before spreserve(): use our string pool instead of LibC heap */
 353    char const **newcpp;
 354    NYD_ENTER;
 355
 356    newcpp = salloc(sizeof(char*) * newsize);
 357
 358    if (oldcnt > 0)
 359       memcpy(newcpp, *cpp, oldcnt * sizeof(char*));
 360    *cpp = newcpp;
 361    NYD_LEAVE;
 362    return newsize;
 363 }
 364
 365 static void
 366 _setup_vars(void)
 367 {
 368    /* Before spreserve(): use our string pool instead of LibC heap */
 369    /* XXX further check paths? */
 370    char const *cp;
 371    uid_t uid;
 372    struct passwd *pwuid, *pw;
 373    NYD_ENTER;
 374
 375    tempdir = ((cp = getenv("TMPDIR")) != NULL) ? savestr(cp) : TMPDIR_FALLBACK;
 376
 377    cp = (myname == NULL) ? getenv("USER") : myname;
 378    uid = getuid();
 379    if ((pwuid = getpwuid(uid)) == NULL)
 380       panic(tr(201, "Cannot associate a name with uid %lu"), (ul_it)uid);
 381    if (cp == NULL)
 382       myname = pwuid->pw_name;
 383    else if ((pw = getpwnam(cp)) == NULL)
 384       panic(tr(236, "`%s' is not a user of this system"), cp);
 385    else {
 386       myname = pw->pw_name;
 387       if (pw->pw_uid != uid)
 388          options |= OPT_u_FLAG;
 389    }
 390    myname = savestr(myname);
 391    /* XXX myfullname = pw->pw_gecos[OPTIONAL!] -> GUT THAT; TODO pw_shell */
 392
 393    if ((cp = getenv("HOME")) == NULL)
 394       cp = "."; /* XXX User and Login objects; Login: pw->pw_dir */
 395    homedir = savestr(cp);
 396    NYD_LEAVE;
 397 }
 398
 399 static void
 400 _setscreensize(int is_sighdl)
 401 {
 402    struct termios tbuf;
 403 #ifdef TIOCGWINSZ
 404    struct winsize ws;
 405 #elif defined TIOCGSIZE
 406    struct ttysize ts;
 407 #endif
 408    NYD_ENTER;
 409
 410    scrnheight = realscreenheight = scrnwidth = 0;
 411
 412    /* (Also) POSIX: LINES and COLUMNS always override.  Adjust this
 413     * a little bit to be able to honour resizes during our lifetime and
 414     * only honour it upon first run; abuse *is_sighdl* as an indicator */
 415    if (!is_sighdl) {
 416       char *cp;
 417       long i;
 418
 419       if ((cp = getenv("LINES")) != NULL && (i = strtol(cp, NULL, 10)) > 0)
 420          scrnheight = realscreenheight = (int)i;
 421       if ((cp = getenv("COLUMNS")) != NULL && (i = strtol(cp, NULL, 10)) > 0)
 422          scrnwidth = (int)i;
 423
 424       if (scrnwidth != 0 && scrnheight != 0)
 425          goto jleave;
 426    }
 427
 428 #ifdef TIOCGWINSZ
 429    if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1)
 430       ws.ws_col = ws.ws_row = 0;
 431 #elif defined TIOCGSIZE
 432    if (ioctl(STDOUT_FILENO, TIOCGSIZE, &ws) == -1)
 433       ts.ts_lines = ts.ts_cols = 0;
 434 #endif
 435
 436    if (scrnheight == 0) {
 437       speed_t ospeed = ((tcgetattr(STDOUT_FILENO, &tbuf) == -1)
 438             ? B9600 : cfgetospeed(&tbuf));
 439
 440       if (ospeed < B1200)
 441          scrnheight = 9;
 442       else if (ospeed == B1200)
 443          scrnheight = 14;
 444 #ifdef TIOCGWINSZ
 445       else if (ws.ws_row != 0)
 446          scrnheight = ws.ws_row;
 447 #elif defined TIOCGSIZE
 448       else if (ts.ts_lines != 0)
 449          scrnheight = ts.ts_lines;
 450 #endif
 451       else
 452          scrnheight = 24;
 453
 454 #if defined TIOCGWINSZ || defined TIOCGSIZE
 455       if (0 ==
 456 # ifdef TIOCGWINSZ
 457             (realscreenheight = ws.ws_row)
 458 # else
 459             (realscreenheight = ts.ts_lines)
 460 # endif
 461       )
 462          realscreenheight = 24;
 463 #endif
 464    }
 465
 466    if (scrnwidth == 0 && 0 ==
 467 #ifdef TIOCGWINSZ
 468          (scrnwidth = ws.ws_col)
 469 #elif defined TIOCGSIZE
 470          (scrnwidth = ts.ts_cols)
 471 #endif
 472    )
 473       scrnwidth = 80;
 474
 475 jleave:
 476 #ifdef SIGWINCH
 477    if (is_sighdl && IS_TTY_SESSION())
 478       tty_signal(SIGWINCH);
 479 #endif
 480    NYD_LEAVE;
 481 }
 482
 483 static sigjmp_buf __hdrjmp; /* XXX */
 484
 485 static int
 486 _rcv_mode(char const *folder, char const *Larg)
 487 {
 488    char *cp;
 489    int i;
 490    sighandler_type prevint;
 491    NYD_ENTER;
 492
 493    if (folder == NULL)
 494       folder = "%";
 495    else if (*folder == '@') {
 496       /* This must be treated specially to make possible invocation like
 497        * -A imap -f @mailbox */
 498       if ((cp = ok_vlook(folder)) != NULL && which_protocol(cp) == PROTO_IMAP)
 499          n_strlcpy(mailname, cp, PATH_MAX);
 500    }
 501
 502    i = setfile(folder, 0);
 503    if (i < 0) {
 504       exit_status = EXIT_ERR; /* error already reported */
 505       goto jleave;
 506    }
 507    if (options & OPT_EXISTONLY) {
 508       exit_status = i;
 509       goto jleave;
 510    }
 511    if (options & (OPT_HEADERSONLY | OPT_HEADERLIST)) {
 512       if ((exit_status = i) == EXIT_OK)
 513          print_header_summary(Larg);
 514       goto jleave;
 515    }
 516
 517    callhook(mailname, 0);
 518    if (i > 0 && !ok_blook(emptystart)) {
 519       exit_status = EXIT_ERR;
 520       goto jleave;
 521    }
 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 jleave:
 551    NYD_LEAVE;
 552    return exit_status;
 553 }
 554
 555 static void
 556 _hdrstop(int signo)
 557 {
 558    NYD_X; /* Signal handler */
 559    UNUSED(signo);
 560
 561    fflush(stdout);
 562    fprintf(stderr, tr(141, "\nInterrupt\n"));
 563    siglongjmp(__hdrjmp, 1);
 564 }
 565
 566 int
 567 main(int argc, char *argv[])
 568 {
 569    static char const optstr[] = "A:a:Bb:c:DdEeFfHiL:NnO:q:Rr:S:s:tu:Vv~#",
 570       usagestr[] =
 571          "Synopsis:\n"
 572          "  %s [-BDdEFintv~] [-A acc] [-a attachment] "
 573             "[-b bcc-addr] [-c cc-addr]\n"
 574          "\t  [-O mtaopt [-O mtaopt-arg]] [-q file] [-r from-addr] "
 575             "[-S var[=value]]\n"
 576          "\t  [-s subject] to-addr...\n"
 577          "  %s [-BDdEeHiNnRv~#] [-A acc] [-L spec-list] [-S var[=value]] "
 578             "-f [file]\n"
 579          "  %s [-BDdEeHiNnRv~#] [-A acc] [-L spec-list] [-S var[=value]] "
 580             "[-u user]\n";
 581
 582    struct a_arg *a_head = NULL, *a_curr = /* silence CC */ NULL;
 583    struct name *to = NULL, *cc = NULL, *bcc = NULL;
 584    struct attachment *attach = NULL;
 585    char *cp = NULL, *subject = NULL, *qf = NULL, *Aarg = NULL, *Larg = NULL;
 586    char const *okey, **oargs = NULL, *folder = NULL;
 587    size_t oargs_size = 0, oargs_count = 0, smopts_size = 0;
 588    int i;
 589    NYD_ENTER;
 590
 591    /*
 592     * Start our lengthy setup
 593     */
 594
 595    starting =
 596    var_clear_allow_undefined = TRU1;
 597
 598    progname = argv[0];
 599    _startup();
 600
 601    /* Command line parsing
 602     * Variable settings need to be done twice, since the user surely wants the
 603     * setting to take effect immediately, but also doesn't want it to be
 604     * overwritten from within resource files */
 605    while ((i = _getopt(argc, argv, optstr)) >= 0) {
 606       switch (i) {
 607       case 'A':
 608          /* Execute an account command later on */
 609          Aarg = _oarg;
 610          break;
 611       case 'a':
 612          options |= OPT_SENDMODE;
 613          {  struct a_arg *nap = ac_alloc(sizeof(struct a_arg));
 614             if (a_head == NULL)
 615                a_head = nap;
 616             else
 617                a_curr->aa_next = nap;
 618             nap->aa_next = NULL;
 619             nap->aa_file = _oarg;
 620             a_curr = nap;
 621          }
 622          break;
 623       case 'B':
 624          /* Make 0/1 line buffered */
 625          setvbuf(stdin, NULL, _IOLBF, 0);
 626          setvbuf(stdout, NULL, _IOLBF, 0);
 627          break;
 628       case 'b':
 629          /* Get Blind Carbon Copy Recipient list */
 630          options |= OPT_SENDMODE;
 631          bcc = cat(bcc, checkaddrs(lextract(_oarg, GBCC | GFULL)));
 632          break;
 633       case 'c':
 634          /* Get Carbon Copy Recipient list */
 635          options |= OPT_SENDMODE;
 636          cc = cat(cc, checkaddrs(lextract(_oarg, GCC | GFULL)));
 637          break;
 638       case 'D':
 639 #ifdef HAVE_IMAP
 640          ok_bset(disconnected, TRU1);
 641          okey = "disconnected";
 642          goto joarg;
 643 #else
 644          break;
 645 #endif
 646       case 'd':
 647          ok_bset(debug, TRU1);
 648          okey = "debug";
 649          goto joarg;
 650       case 'E':
 651          ok_bset(skipemptybody, TRU1);
 652          okey = "skipemptybody";
 653          goto joarg;
 654       case 'e':
 655          options |= OPT_EXISTONLY;
 656          break;
 657       case 'F':
 658          options |= OPT_F_FLAG | OPT_SENDMODE;
 659          break;
 660       case 'f':
 661          /* User is specifying file to "edit" with Mail, as opposed to reading
 662           * system mailbox.  If no argument is given, we read his mbox file.
 663           * Check for remaining arguments later */
 664          folder = "&";
 665          break;
 666       case 'H':
 667          options |= OPT_HEADERSONLY;
 668          break;
 669       case 'i':
 670          /* Ignore interrupts */
 671          ok_bset(ignore, TRU1);
 672          okey = "ignore";
 673          goto joarg;
 674       case 'L':
 675          Larg = _oarg;
 676          options |= OPT_HEADERLIST;
 677          if (*Larg == '"' || *Larg == '\'') { /* TODO list.c:listspec_check() */
 678             size_t j = strlen(++Larg);
 679             if (j > 0)
 680                Larg[j - 1] = '\0';
 681          }
 682          break;
 683       case 'N':
 684          /* Avoid initial header printing */
 685          ok_bset(header, FAL0);
 686          okey = "noheader";
 687          goto joarg;
 688       case 'n':
 689          /* Don't source "unspecified system start-up file" */
 690          options |= OPT_NOSRC;
 691          break;
 692       case 'O':
 693          /* Additional options to pass-through to MTA */
 694          if (smopts_count == (size_t)smopts_size)
 695             smopts_size = _grow_cpp(&smopts, smopts_size + 8, smopts_count);
 696          smopts[smopts_count++] = skin(_oarg);
 697          break;
 698       case 'q':
 699          /* Quote file TODO drop? -Q with real quote?? what ? */
 700          options |= OPT_SENDMODE;
 701          if (*_oarg != '-')
 702             qf = _oarg;
 703          break;
 704       case 'R':
 705          /* Open folders read-only */
 706          options |= OPT_R_FLAG;
 707          break;
 708       case 'r':
 709          /* Set From address. */
 710          options |= OPT_r_FLAG;
 711          if ((option_r_arg = _oarg)[0] != '\0') {
 712             struct name *fa = nalloc(_oarg, GFULL);
 713
 714             if (is_addr_invalid(fa, 1) || is_fileorpipe_addr(fa)) {
 715                fprintf(stderr, tr(271, "Invalid address argument with -r\n"));
 716                goto jusage;
 717             }
 718             option_r_arg = fa->n_name;
 719             /* TODO -r options is set in smopts, but may
 720              * TODO be overwritten by setting from= in
 721              * TODO an interactive session!
 722              * TODO Maybe disable setting of from?
 723              * TODO Warn user?  Update manual!! */
 724             okey = savecat("from=", fa->n_fullname);
 725             goto joarg;
 726             /* ..and fa goes even though it is ready :/ */
 727          }
 728          break;
 729       case 'S':
 730          /* Set variable (twice) */
 731          {  char *a[2];
 732             okey = a[0] = _oarg;
 733             a[1] = NULL;
 734             c_set(a);
 735          }
 736 joarg:
 737          if (oargs_count == oargs_size)
 738             oargs_size = _grow_cpp(&oargs, oargs_size + 8, oargs_count);
 739          oargs[oargs_count++] = okey;
 740          break;
 741       case 's':
 742          /* Subject: */
 743          subject = _oarg;
 744          options |= OPT_SENDMODE;
 745          break;
 746       case 't':
 747          /* Read defined set of headers from mail to be send */
 748          options |= OPT_SENDMODE | OPT_t_FLAG;
 749          break;
 750       case 'u':
 751          /* Set user name to pretend to be; don't set OPT_u_FLAG yet, this is
 752           * done as necessary in _setup_vars() above */
 753          myname = _oarg;
 754          break;
 755       case 'V':
 756          puts(version);
 757          exit(0);
 758          /* NOTREACHED */
 759       case 'v':
 760          /* Be verbose */
 761          ok_bset(verbose, TRU1);
 762          okey = "verbose";
 763          goto joarg;
 764       case '~':
 765          /* Enable tilde escapes even in non-interactive mode */
 766          options |= OPT_TILDE_FLAG;
 767          break;
 768       case '#':
 769          /* Work in batch mode, even if non-interactive */
 770          if (oargs_count + 6 >= oargs_size)
 771             oargs_size = _grow_cpp(&oargs, oargs_size + 8, oargs_count);
 772          /* xxx Setting most of the -# options immediately is useless, so be
 773           * selective in what is set immediately */
 774          options |= OPT_TILDE_FLAG | OPT_BATCH_FLAG;
 775          folder = "/dev/null";
 776          ok_bset(dot, TRU1);
 777          ok_bset(emptystart, TRU1);
 778          ok_bset(header, FAL0);
 779          ok_bset(quiet, TRU1);
 780          ok_bset(sendwait, TRU1);
 781          ok_vset(MBOX, folder);
 782          oargs[oargs_count + 0] = "dot";
 783          oargs[oargs_count + 1] = "emptystart";
 784          oargs[oargs_count + 2] = "noheader";
 785          oargs[oargs_count + 3] = "quiet";
 786          oargs[oargs_count + 4] = "sendwait";
 787          oargs[oargs_count + 5] = "MBOX=/dev/null";
 788          oargs_count += 6;
 789          break;
 790       case '?':
 791 jusage:
 792          fprintf(stderr, tr(135, usagestr), progname, progname, progname);
 793          exit_status = EXIT_USE;
 794          goto jleave;
 795       }
 796    }
 797
 798    /* OPT_BATCH_FLAG sets to /dev/null, but -f can still be used and sets & */
 799    if (folder != NULL && folder[1] == '\0') {
 800       if (_oind < argc) {
 801          if (_oind + 1 < argc) {
 802             fprintf(stderr, tr(205, "More than one file given with -f\n"));
 803             goto jusage;
 804          }
 805          folder = argv[_oind];
 806       }
 807    } else {
 808       for (i = _oind; argv[i]; ++i)
 809          to = cat(to, checkaddrs(lextract(argv[i], GTO | GFULL)));
 810       if (to != NULL)
 811          options |= OPT_SENDMODE;
 812    }
 813
 814    /* Check for inconsistent arguments */
 815    if (options & OPT_SENDMODE) {
 816       if (folder != NULL && !(options & OPT_BATCH_FLAG)) {
 817          fprintf(stderr, tr(137, "Cannot give -f and people to send to.\n"));
 818          goto jusage;
 819       }
 820       if (myname != NULL) {
 821          fprintf(stderr, tr(568,
 822             "The -u option cannot be used in send mode\n"));
 823          goto jusage;
 824       }
 825       if (!(options & OPT_t_FLAG) && to == NULL) {
 826          fprintf(stderr, tr(138,
 827             "Send options without primary recipient specified.\n"));
 828          goto jusage;
 829       }
 830       if (options & (OPT_HEADERSONLY | OPT_HEADERLIST)) {
 831          fprintf(stderr, tr(45,
 832             "The -H and -L options cannot be used in send mode.\n"));
 833          goto jusage;
 834       }
 835       if (options & OPT_R_FLAG) {
 836          fprintf(stderr,
 837             tr(235, "The -R option is meaningless in send mode.\n"));
 838          goto jusage;
 839       }
 840    } else {
 841       if (folder != NULL && myname != NULL) {
 842          fprintf(stderr, tr(569,
 843             "The options -f and -u are mutually exclusive\n"));
 844          goto jusage;
 845       }
 846    }
 847
 848    /*
 849     * Likely to go, perform more setup
 850     */
 851
 852    _setup_vars();
 853
 854    if (options & OPT_INTERACTIVE) {
 855       _setscreensize(0);
 856 #ifdef SIGWINCH
 857 # ifndef TTY_WANTS_SIGWINCH
 858       if (safe_signal(SIGWINCH, SIG_IGN) != SIG_IGN)
 859 # endif
 860          safe_signal(SIGWINCH, _setscreensize);
 861 #endif
 862    } else
 863       scrnheight = realscreenheight = 24, scrnwidth = 80;
 864
 865    /* Snapshot our string pools.  Memory is auto-reclaimed from now on */
 866    spreserve();
 867
 868    if (!(options & OPT_NOSRC) && getenv("NAIL_NO_SYSTEM_RC") == NULL)
 869       load(SYSCONFRC);
 870    /* *expand() returns a savestr(), but load only uses the file name for
 871     * fopen(), so it's safe to do this */
 872    if ((cp = getenv("MAILRC")) == NULL && (cp = getenv("NAILRC")) == NULL)
 873       cp = UNCONST(MAILRC);
 874    load(file_expand(cp));
 875    if (getenv("NAIL_EXTRA_RC") == NULL &&
 876          (cp = ok_vlook(NAIL_EXTRA_RC)) != NULL)
 877       load(file_expand(cp));
 878
 879    /* Now we can set the account */
 880    if (Aarg != NULL) {
 881       char *a[2];
 882       a[0] = Aarg;
 883       a[1] = NULL;
 884       c_account(a);
 885    }
 886
 887    /* Ensure the -S and other command line options take precedence over
 888     * anything that may have been placed in resource files.
 889     * Our "ternary binary" option *verbose* needs special treament */
 890    if ((options & (OPT_VERB | OPT_VERBVERB)) == OPT_VERB)
 891       options &= ~OPT_VERB;
 892    for (i = 0; UICMP(z, i, <, oargs_count); ++i) {
 893       char const *a[2];
 894       a[0] = oargs[i];
 895       a[1] = NULL;
 896       c_set(a);
 897    }
 898
 899    /*
 900     * We're finally completely setup and ready to go
 901     */
 902
 903    starting =
 904    var_clear_allow_undefined = FAL0;
 905
 906    if (options & OPT_DEBUG)
 907       fprintf(stderr, tr(199, "user = %s, homedir = %s\n"), myname, homedir);
 908
 909    if (!(options & OPT_SENDMODE)) {
 910       exit_status = _rcv_mode(folder, Larg);
 911       goto jleave;
 912    }
 913
 914    /* Now that full mailx(1)-style file expansion is possible handle the
 915     * attachments which we had delayed due to this.
 916     * This may use savestr(), but since we won't enter the command loop we
 917     * don't need to care about that */
 918    while (a_head != NULL) {
 919       attach = add_attachment(attach, a_head->aa_file, NULL);
 920       if (attach != NULL) {
 921          a_curr = a_head;
 922          a_head = a_head->aa_next;
 923          ac_free(a_curr);
 924       } else {
 925          perror(a_head->aa_file);
 926          exit_status = EXIT_ERR;
 927          goto jleave;
 928       }
 929    }
 930
 931    /* xxx exit_status = EXIT_OK; */
 932    if (options & OPT_INTERACTIVE)
 933       tty_init();
 934    mail(to, cc, bcc, subject, attach, qf, ((options & OPT_F_FLAG) != 0));
 935    if (options & OPT_INTERACTIVE)
 936       tty_destroy();
 937 jleave:
 938    NYD_LEAVE;
 939    return exit_status;
 940 }
 941
 942 /* vim:set fenc=utf-8:s-it-mode */