main.c

   1 /*@ S-nail - a mail user agent derived from Berkeley Mail.
   2  *@ Startup and initialization.
   3  *@ This file is also used to materialize externals.
   4  *
   5  * Copyright (c) 2000-2004 Gunnar Ritter, Freiburg i. Br., Germany.
   6  * Copyright (c) 2012 - 2015 Steffen (Daode) Nurpmeso <sdaoden@users.sf.net>.
   7  */
   8 /*
   9  * Copyright (c) 1980, 1993
  10  *      The Regents of the University of California.  All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  * 3. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  */
  36 #undef n_FILE
  37 #define n_FILE main
  38 #define n_MAIN_SOURCE
  39
  40 #include "nail.h"
  41
  42 #include <sys/ioctl.h>
  43
  44 #include <pwd.h>
  45
  46 #ifdef HAVE_NL_LANGINFO
  47 # include <langinfo.h>
  48 #endif
  49 #ifdef HAVE_SETLOCALE
  50 # include <locale.h>
  51 #endif
  52
  53 struct a_arg {
  54    struct a_arg   *aa_next;
  55    char           *aa_file;
  56 };
  57
  58 struct X_arg {
  59    struct X_arg   *xa_next;
  60    size_t         xa_cmd_len;
  61    char           xa_cmd_buf[VFIELD_SIZE(sizeof(size_t))];
  62 };
  63
  64 /* (extern, but not with amalgamation, so define here) */
  65 VL char const        weekday_names[7 + 1][4] = {
  66    "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", ""
  67 };
  68 VL char const        month_names[12 + 1][4] = {
  69    "Jan", "Feb", "Mar", "Apr", "May", "Jun",
  70    "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", ""
  71 };
  72 VL char const        uagent[sizeof UAGENT] = UAGENT;
  73 VL uc_i const        class_char[1 + 0x7F] = {
  74 /* 000 nul  001 soh  002 stx  003 etx  004 eot  005 enq  006 ack  007 bel */
  75    C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL,
  76 /* 010 bs   011 ht   012 nl   013 vt   014 np   015 cr   016 so   017 si */
  77    C_CNTRL, C_BLANK, C_WHITE, C_SPACE, C_SPACE, C_SPACE, C_CNTRL, C_CNTRL,
  78 /* 020 dle  021 dc1  022 dc2  023 dc3  024 dc4  025 nak  026 syn  027 etb */
  79    C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL,
  80 /* 030 can  031 em   032 sub  033 esc  034 fs   035 gs   036 rs   037 us */
  81    C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL,
  82 /* 040 sp   041  !   042  "   043  #   044  $   045  %   046  &   047  ' */
  83    C_BLANK, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT,
  84 /* 050  (   051  )   052  *   053  +   054  ,    055  -   056  .   057  / */
  85    C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT,
  86 /* 060  0   061  1   062  2   063  3   064  4   065  5   066  6   067  7 */
  87    C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL, C_OCTAL,
  88 /* 070  8   071  9   072  :   073  ;   074  <   075  =   076  >   077  ? */
  89    C_DIGIT, C_DIGIT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT,
  90 /* 100  @   101  A   102  B   103  C   104  D   105  E   106  F   107  G */
  91    C_PUNCT, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER,
  92 /* 110  H   111  I   112  J   113  K   114  L   115  M   116  N   117  O */
  93    C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER,
  94 /* 120  P   121  Q   122  R   123  S   124  T   125  U   126  V   127  W */
  95    C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER, C_UPPER,
  96 /* 130  X   131  Y   132  Z   133  [   134  \   135  ]   136  ^   137  _ */
  97    C_UPPER, C_UPPER, C_UPPER, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT,
  98 /* 140  `   141  a   142  b   143  c   144  d   145  e   146  f   147  g */
  99    C_PUNCT, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER,
 100 /* 150  h   151  i   152  j   153  k   154  l   155  m   156  n   157  o */
 101    C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER,
 102 /* 160  p   161  q   162  r   163  s   164  t   165  u   166  v   167  w */
 103    C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER, C_LOWER,
 104 /* 170  x   171  y   172  z   173  {   174  |   175  }   176  ~   177 del */
 105    C_LOWER, C_LOWER, C_LOWER, C_PUNCT, C_PUNCT, C_PUNCT, C_PUNCT, C_CNTRL
 106 };
 107
 108 /* Our own little getopt(3) */
 109 static char          *_oarg;
 110 static int           _oind, /*_oerr,*/ _oopt;
 111
 112 /* Our own little getopt(3); note --help is special-treated as 'h' */
 113 static int     _getopt(int argc, char * const argv[], char const *optstring);
 114
 115 /* Perform basic startup initialization */
 116 static void    _startup(void);
 117
 118 /* Grow a char** */
 119 static size_t  _grow_cpp(char const ***cpp, size_t newsize, size_t oldcnt);
 120
 121 /* Initialize *tempdir*, *myname*, *homedir* */
 122 static void    _setup_vars(void);
 123
 124 /* We're in an interactive session - compute what the screen size for printing
 125  * headers etc. should be; notify tty upon resize if *is_sighdl* is not 0.
 126  * We use the following algorithm for the height:
 127  * If baud rate < 1200, use  9
 128  * If baud rate = 1200, use 14
 129  * If baud rate > 1200, use 24 or ws_row
 130  * Width is either 80 or ws_col */
 131 static void    _setscreensize(int is_sighdl);
 132
 133 /* Ok, we are reading mail.  Decide whether we are editing a mailbox or reading
 134  * the system mailbox, and open up the right stuff */
 135 static int     _rcv_mode(char const *folder, char const *Larg,
 136                   struct X_arg *xhp);
 137
 138 /* Interrupt printing of the headers */
 139 static void    _hdrstop(int signo);
 140
 141 /* -X arg given at least once, evaluate the list in order */
 142 static bool_t  _X_arg_eval(struct X_arg *xhp);
 143
 144 static int
 145 _getopt(int argc, char * const argv[], char const *optstring)
 146 {
 147    static char const *lastp;
 148
 149    int rv = -1, colon;
 150    char const *curp;
 151    NYD_ENTER;
 152
 153    _oarg = NULL;
 154
 155    if ((colon = (optstring[0] == ':')))
 156       ++optstring;
 157    if (lastp != NULL) {
 158       curp = lastp;
 159       lastp = 0;
 160    } else {
 161       if (_oind >= argc || argv[_oind] == NULL || argv[_oind][0] != '-' ||
 162             argv[_oind][1] == '\0')
 163          goto jleave;
 164       if (argv[_oind][1] == '-' && argv[_oind][2] == '\0') {
 165          /* We need this in for MTA arg detection (easier) ++_oind;*/
 166          goto jleave;
 167       }
 168       curp = &argv[_oind][1];
 169    }
 170
 171    _oopt = curp[0];
 172    while (optstring[0] != '\0') {
 173       if (optstring[0] == ':' || optstring[0] != _oopt) {
 174          ++optstring;
 175          continue;
 176       }
 177       if (optstring[1] == ':') {
 178          if (curp[1] != '\0') {
 179             _oarg = UNCONST(curp + 1);
 180             ++_oind;
 181          } else {
 182             if ((_oind += 2) > argc) {
 183                if (!colon /*&& _oerr*/) {
 184                   n_err(_("%s: option requires an argument -- %c\n"),
 185                      argv[0], (char)_oopt);
 186                }
 187                rv = (colon ? ':' : '?');
 188                goto jleave;
 189             }
 190             _oarg = argv[_oind - 1];
 191          }
 192       } else {
 193          if (curp[1] != '\0')
 194             lastp = curp + 1;
 195          else
 196             ++_oind;
 197       }
 198       rv = _oopt;
 199       goto jleave;
 200    }
 201
 202    /* Special support for --help, which is quite common */
 203    if (_oopt == '-' && !strcmp(curp, "-help") && curp - 1 == argv[_oind]) {
 204       ++_oind;
 205       rv = 'h';
 206       goto jleave;
 207    }
 208
 209    /* Definitive error */
 210    if (!colon /*&& opterr*/)
 211       n_err(_("%s: invalid option -- %c\n"), argv[0], _oopt);
 212    if (curp[1] != '\0')
 213       lastp = curp + 1;
 214    else
 215       ++_oind;
 216    _oarg = 0;
 217    rv = '?';
 218 jleave:
 219    NYD_LEAVE;
 220    return rv;
 221 }
 222
 223 static void
 224 _startup(void)
 225 {
 226    char *cp;
 227    NYD_ENTER;
 228
 229    image = -1;
 230    dflpipe = SIG_DFL;
 231    _oind = /*_oerr =*/ 1;
 232
 233    if ((cp = strrchr(progname, '/')) != NULL)
 234       progname = ++cp;
 235
 236    /* Set up a reasonable environment */
 237
 238 #ifdef HAVE_NYD
 239    safe_signal(SIGABRT, &_nyd_oncrash);
 240 # ifdef SIGBUS
 241    safe_signal(SIGBUS, &_nyd_oncrash);
 242 # endif
 243    safe_signal(SIGFPE, &_nyd_oncrash);
 244    safe_signal(SIGILL, &_nyd_oncrash);
 245    safe_signal(SIGSEGV, &_nyd_oncrash);
 246 #endif
 247    command_manager_start();
 248
 249    if (isatty(STDIN_FILENO)) /* TODO should be isatty(0) && isatty(2)?? */
 250       options |= OPT_TTYIN | OPT_INTERACTIVE;
 251    if (isatty(STDOUT_FILENO))
 252       options |= OPT_TTYOUT;
 253    if (IS_TTY_SESSION())
 254       safe_signal(SIGPIPE, dflpipe = SIG_IGN);
 255
 256    /*  --  >8  --  8<  --  */
 257
 258    /* Define defaults for internal variables, based on POSIX 2008/Cor 1-2013 */
 259    /* (Keep in sync:
 260     * ./main.c:_startup(), ./nail.rc, ./nail.1:"Initial settings") */
 261    /* noallnet */
 262    /* noappend */
 263    ok_bset(asksub, TRU1);
 264    /* noaskbcc */
 265    /* noaskcc */
 266    /* noautoprint */
 267    /* nobang */
 268    /* nocmd */
 269    /* nocrt */
 270    /* nodebug */
 271    /* nodot */
 272    /* ok_vset(escape, ESCAPE *"~"*); TODO non-compliant */
 273    /* noflipr */
 274    /* nofolder */
 275    ok_bset(header, TRU1);
 276    /* nohold */
 277    /* noignore */
 278    /* noignoreeof */
 279    /* nokeep */
 280    /* nokeepsave */
 281    /* nometoo */
 282    /* noonehop -- Note: we ignore this one */
 283    /* nooutfolder */
 284    /* nopage */
 285    ok_vset(prompt, "\\& "); /* POSIX "? " unless *bsdcompat*, then "& " */
 286    /* noquiet */
 287    /* norecord */
 288    ok_bset(save, TRU1);
 289    /* nosendwait */
 290    /* noshowto */
 291    /* nosign */
 292    /* noSign */
 293    /* ok_vset(toplines, "5"); XXX somewhat hmm */
 294
 295    /* TODO until we have an automatic mechanism for that, set some more
 296     * TODO variables so that users see the internal fallback settings
 297     * TODO (something like "defval=X,notempty=1") */
 298    do {
 299       char const *vp;
 300
 301       vp = env_vlook("SHELL", TRU1);
 302       ok_vset(SHELL, (vp != NULL ? vp : XSHELL));
 303
 304       vp = env_vlook("LISTER", TRU1);
 305       ok_vset(LISTER, (vp != NULL ? vp : XLISTER));
 306
 307       vp = env_vlook("PAGER", TRU1);
 308       ok_vset(PAGER, (vp != NULL ? vp : XPAGER));
 309
 310       ok_vset(sendmail, SENDMAIL);
 311       ok_vset(sendmail_progname, SENDMAIL_PROGNAME);
 312    } while (0);
 313
 314    /*  --  >8  --  8<  --  */
 315
 316 #ifdef HAVE_SETLOCALE
 317    setlocale(LC_ALL, "");
 318    mb_cur_max = MB_CUR_MAX;
 319 # ifdef HAVE_NL_LANGINFO
 320    if (ok_vlook(ttycharset) == NULL && (cp = nl_langinfo(CODESET)) != NULL)
 321       ok_vset(ttycharset, cp);
 322 # endif
 323
 324 # ifdef HAVE_C90AMEND1
 325    if (mb_cur_max > 1) {
 326       wchar_t  wc;
 327       if (mbtowc(&wc, "\303\266", 2) == 2 && wc == 0xF6 &&
 328             mbtowc(&wc, "\342\202\254", 3) == 3 && wc == 0x20AC)
 329          options |= OPT_UNICODE;
 330       /* Reset possibly messed up state; luckily this also gives us an
 331        * indication wether the encoding has locking shift state sequences */
 332       /* TODO temporary - use option bits! */
 333       if (mbtowc(&wc, NULL, mb_cur_max))
 334          options |= OPT_ENC_MBSTATE;
 335    }
 336 # endif
 337 #else
 338    mb_cur_max = 1;
 339 #endif
 340
 341 #ifdef HAVE_ICONV
 342    iconvd = (iconv_t)-1;
 343 #endif
 344    NYD_LEAVE;
 345 }
 346
 347 static size_t
 348 _grow_cpp(char const ***cpp, size_t newsize, size_t oldcnt)
 349 {
 350    /* Before spreserve(): use our string pool instead of LibC heap */
 351    char const **newcpp;
 352    NYD_ENTER;
 353
 354    newcpp = salloc(sizeof(char*) * newsize);
 355
 356    if (oldcnt > 0)
 357       memcpy(newcpp, *cpp, oldcnt * sizeof(char*));
 358    *cpp = newcpp;
 359    NYD_LEAVE;
 360    return newsize;
 361 }
 362
 363 static void
 364 _setup_vars(void)
 365 {
 366    /* Before spreserve(): use our string pool instead of LibC heap */
 367    /* XXX further check paths? */
 368    char const *cp;
 369    uid_t uid;
 370    struct passwd *pwuid, *pw;
 371    NYD_ENTER;
 372
 373    tempdir = ((cp = env_vlook("TMPDIR", TRU1)) != NULL)
 374          ? savestr(cp) : TMPDIR_FALLBACK;
 375
 376    cp = (myname == NULL) ? env_vlook("USER", TRU1) : myname;
 377    group_id = getgid();
 378    user_id = uid = getuid();
 379    if ((pwuid = getpwuid(uid)) == NULL)
 380       n_panic(_("Cannot associate a name with uid %u"), user_id);
 381    if (cp == NULL || *cp == '\0')
 382       myname = pwuid->pw_name;
 383    else if ((pw = getpwnam(cp)) == NULL) {
 384       n_alert(_("\"%s\" is not a user of this system"), cp);
 385       exit(EXIT_NOUSER);
 386    } else {
 387       myname = pw->pw_name;
 388       if (pw->pw_uid != uid)
 389          options |= OPT_u_FLAG;
 390    }
 391    myname = savestr(myname);
 392    /* XXX myfullname = pw->pw_gecos[OPTIONAL!] -> GUT THAT; TODO pw_shell */
 393
 394    if ((cp = env_vlook("HOME", TRU1)) == NULL)
 395       cp = "."; /* XXX User and Login objects; Login: pw->pw_dir */
 396    homedir = savestr(cp);
 397    NYD_LEAVE;
 398 }
 399
 400 static void
 401 _setscreensize(int is_sighdl) /* TODO global policy; int wraps; minvals! */
 402 {
 403    struct termios tbuf;
 404 #ifdef TIOCGWINSZ
 405    struct winsize ws;
 406 #elif defined TIOCGSIZE
 407    struct ttysize ts;
 408 #endif
 409    NYD_ENTER;
 410
 411    scrnheight = realscreenheight = scrnwidth = 0;
 412
 413    /* (Also) POSIX: LINES and COLUMNS always override.  Adjust this
 414     * a little bit to be able to honour resizes during our lifetime and
 415     * only honour it upon first run; abuse *is_sighdl* as an indicator */
 416    if (!is_sighdl) {
 417       char *cp;
 418       long i;
 419
 420       if ((cp = env_vlook("LINES", FAL0)) != NULL &&
 421             (i = strtol(cp, NULL, 10)) > 0 && i < INT_MAX)
 422          scrnheight = realscreenheight = (int)i;
 423       if ((cp = env_vlook("COLUMNS", FAL0)) != NULL &&
 424             (i = strtol(cp, NULL, 10)) > 0 && i < INT_MAX)
 425          scrnwidth = (int)i;
 426
 427       if (scrnwidth != 0 && scrnheight != 0)
 428          goto jleave;
 429    }
 430
 431 #ifdef TIOCGWINSZ
 432    if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1)
 433       ws.ws_col = ws.ws_row = 0;
 434 #elif defined TIOCGSIZE
 435    if (ioctl(STDOUT_FILENO, TIOCGSIZE, &ws) == -1)
 436       ts.ts_lines = ts.ts_cols = 0;
 437 #endif
 438
 439    if (scrnheight == 0) {
 440       speed_t ospeed = ((tcgetattr(STDOUT_FILENO, &tbuf) == -1)
 441             ? B9600 : cfgetospeed(&tbuf));
 442
 443       if (ospeed < B1200)
 444          scrnheight = 9;
 445       else if (ospeed == B1200)
 446          scrnheight = 14;
 447 #ifdef TIOCGWINSZ
 448       else if (ws.ws_row != 0)
 449          scrnheight = ws.ws_row;
 450 #elif defined TIOCGSIZE
 451       else if (ts.ts_lines != 0)
 452          scrnheight = ts.ts_lines;
 453 #endif
 454       else
 455          scrnheight = 24;
 456
 457 #if defined TIOCGWINSZ || defined TIOCGSIZE
 458       if (0 ==
 459 # ifdef TIOCGWINSZ
 460             (realscreenheight = ws.ws_row)
 461 # else
 462             (realscreenheight = ts.ts_lines)
 463 # endif
 464       )
 465          realscreenheight = 24;
 466 #endif
 467    }
 468
 469    if (scrnwidth == 0 && 0 ==
 470 #ifdef TIOCGWINSZ
 471          (scrnwidth = ws.ws_col)
 472 #elif defined TIOCGSIZE
 473          (scrnwidth = ts.ts_cols)
 474 #endif
 475    )
 476       scrnwidth = 80;
 477
 478 jleave:
 479 #ifdef SIGWINCH
 480    if (is_sighdl && IS_TTY_SESSION())
 481       tty_signal(SIGWINCH);
 482 #endif
 483    NYD_LEAVE;
 484 }
 485
 486 static sigjmp_buf __hdrjmp; /* XXX */
 487
 488 static int
 489 _rcv_mode(char const *folder, char const *Larg, struct X_arg *xhp)
 490 {
 491    char *cp;
 492    int i;
 493    sighandler_type prevint;
 494    NYD_ENTER;
 495
 496    if (folder == NULL)
 497       folder = "%";
 498    else if (*folder == '@') {
 499       /* This must be treated specially to make possible invocation like
 500        * -A imap -f @mailbox */
 501       if ((cp = ok_vlook(folder)) != NULL && which_protocol(cp) == PROTO_IMAP)
 502          n_strlcpy(mailname, cp, PATH_MAX);
 503    }
 504
 505    if (options & OPT_QUICKRUN_MASK)
 506       i = FEDIT_RDONLY;
 507    else
 508       i = FEDIT_NONE;
 509    i = setfile(folder, i);
 510    if (i < 0) {
 511       exit_status = EXIT_ERR; /* error already reported */
 512       goto jquit;
 513    }
 514    if (options & OPT_QUICKRUN_MASK) {
 515       exit_status = i;
 516       if (!(options & OPT_EXISTONLY) && i == EXIT_OK)
 517          print_header_summary(Larg);
 518       goto jquit;
 519    }
 520    check_folder_hook(FAL0);
 521
 522    if (i > 0 && !ok_blook(emptystart)) {
 523       exit_status = EXIT_ERR;
 524       goto jleave;
 525    }
 526
 527    if (sigsetjmp(__hdrjmp, 1) == 0) {
 528       if ((prevint = safe_signal(SIGINT, SIG_IGN)) != SIG_IGN)
 529          safe_signal(SIGINT, _hdrstop);
 530       if (!(options & OPT_N_FLAG)) {
 531          if (!ok_blook(quiet))
 532             printf(_("%s version %s.  Type ? for help.\n"),
 533                (ok_blook(bsdcompat) ? "Mail" : uagent), ok_vlook(version));
 534          announce(1);
 535          fflush(stdout);
 536       }
 537       safe_signal(SIGINT, prevint);
 538    }
 539
 540    /* Enter the command loop */
 541    if (xhp == NULL || _X_arg_eval(xhp)) {
 542       if (options & OPT_INTERACTIVE)
 543          tty_init();
 544       commands();
 545       if (options & OPT_INTERACTIVE)
 546          tty_destroy();
 547    }
 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 jquit:
 555    save_mbox_for_possible_quitstuff();
 556    quit();
 557 jleave:
 558    NYD_LEAVE;
 559    return exit_status;
 560 }
 561
 562 static void
 563 _hdrstop(int signo)
 564 {
 565    NYD_X; /* Signal handler */
 566    UNUSED(signo);
 567
 568    fflush(stdout);
 569    n_err_sighdl(_("\nInterrupt\n"));
 570    siglongjmp(__hdrjmp, 1);
 571 }
 572
 573 static bool_t
 574 _X_arg_eval(struct X_arg *xhp) /* TODO error handling not right */
 575 {
 576    struct eval_ctx ev;
 577    struct X_arg *xp;
 578    bool_t rv = TRU1;
 579    NYD_ENTER;
 580
 581    while ((xp = xhp) != NULL) {
 582       xhp = xp->xa_next;
 583
 584       memset(&ev, 0, sizeof ev);
 585       ev.ev_line.s = xp->xa_cmd_buf;
 586       ev.ev_line.l = xp->xa_cmd_len;
 587       ev.ev_is_recursive = TRU1;
 588       pstate &= ~PS_HOOK_MASK;
 589       rv = (evaluate(&ev) == 0);
 590       free(xp);
 591
 592       if (!rv) {
 593          if (exit_status == EXIT_OK)
 594             exit_status = EXIT_ERR;
 595          break;
 596       }
 597       if ((options & OPT_BATCH_FLAG) && ok_blook(batch_exit_on_error)) {
 598          if (exit_status != EXIT_OK)
 599             break;
 600          if (pstate & PS_EVAL_ERROR) {
 601             exit_status = EXIT_ERR;
 602             break;
 603          }
 604       }
 605    }
 606    NYD_LEAVE;
 607    return rv;
 608 }
 609
 610 int
 611 main(int argc, char *argv[])
 612 {
 613    static char const optstr[] = "A:a:Bb:c:DdEeFfHhiL:NnO:q:Rr:S:s:tu:VvX:~#.",
 614       usagestr[] = N_(
 615          " Synopsis:\n"
 616          "  %s -h | --help\n"
 617          "  %s [-BDdEFintv~] [-A account]\n"
 618          "\t [-a attachment] [-b bcc-address] [-c cc-address]\n"
 619          "\t [-q file] [-r from-address] [-S var[=value]...]\n"
 620          "\t [-s subject] [-X cmd] [-.] to-address... [-- mta-option...]\n"
 621          "  %s [-BDdEeHiNnRv~#] [-A account]\n"
 622          "\t [-L spec-list] [-r from-address] [-S var[=value]...]\n"
 623          "\t [-X cmd] -f [file] [-- mta-option...]\n"
 624          "  %s [-BDdEeHiNnRv~#] [-A account]\n"
 625          "\t [-L spec-list] [-r from-address] [-S var[=value]...]\n"
 626          "\t [-u user] [-X cmd] [-- mta-option...]\n"
 627       );
 628 #define _USAGE_ARGS , progname, progname, progname, progname
 629
 630    struct X_arg *X_head = NULL, *X_curr = /* silence CC */ NULL;
 631    struct a_arg *a_head = NULL, *a_curr = /* silence CC */ NULL;
 632    struct name *to = NULL, *cc = NULL, *bcc = NULL;
 633    struct attachment *attach = NULL;
 634    char *cp = NULL, *subject = NULL, *qf = NULL, *Aarg = NULL, *Larg = NULL;
 635    char const *okey, **oargs = NULL, *folder = NULL, *emsg = NULL;
 636    size_t oargs_size = 0, oargs_count = 0, smopts_size = 0;
 637    int i;
 638    NYD_ENTER;
 639
 640    /*
 641     * Start our lengthy setup, finalize by setting PS_STARTED
 642     */
 643
 644    progname = argv[0];
 645    _startup();
 646
 647    /* Command line parsing
 648     * Variable settings need to be done twice, since the user surely wants the
 649     * setting to take effect immediately, but also doesn't want it to be
 650     * overwritten from within resource files */
 651    while ((i = _getopt(argc, argv, optstr)) >= 0) {
 652       switch (i) {
 653       case 'A':
 654          /* Execute an account command later on */
 655          Aarg = _oarg;
 656          break;
 657       case 'a':
 658          options |= OPT_SENDMODE;
 659          {  struct a_arg *nap = salloc(sizeof(struct a_arg));
 660             if (a_head == NULL)
 661                a_head = nap;
 662             else
 663                a_curr->aa_next = nap;
 664             nap->aa_next = NULL;
 665             nap->aa_file = _oarg;
 666             a_curr = nap;
 667          }
 668          break;
 669       case 'B':
 670          /* Make 0/1 line buffered */
 671          setvbuf(stdin, NULL, _IOLBF, 0);
 672          setvbuf(stdout, NULL, _IOLBF, 0);
 673          break;
 674       case 'b':
 675          /* Get Blind Carbon Copy Recipient list */
 676          options |= OPT_SENDMODE;
 677          bcc = cat(bcc, lextract(_oarg, GBCC | GFULL));
 678          break;
 679       case 'c':
 680          /* Get Carbon Copy Recipient list */
 681          options |= OPT_SENDMODE;
 682          cc = cat(cc, lextract(_oarg, GCC | GFULL));
 683          break;
 684       case 'D':
 685 #ifdef HAVE_IMAP
 686          ok_bset(disconnected, TRU1);
 687          okey = "disconnected";
 688          goto joarg;
 689 #else
 690          break;
 691 #endif
 692       case 'd':
 693          ok_bset(debug, TRU1);
 694          okey = "debug";
 695          goto joarg;
 696       case 'E':
 697          ok_bset(skipemptybody, TRU1);
 698          okey = "skipemptybody";
 699          goto joarg;
 700       case 'e':
 701          options |= OPT_EXISTONLY;
 702          break;
 703       case 'F':
 704          options |= OPT_F_FLAG | OPT_SENDMODE;
 705          break;
 706       case 'f':
 707          /* User is specifying file to "edit" with Mail, as opposed to reading
 708           * system mailbox.  If no argument is given, we read his mbox file.
 709           * Check for remaining arguments later */
 710          folder = "&";
 711          break;
 712       case 'H':
 713          options |= OPT_HEADERSONLY;
 714          break;
 715       case 'h':
 716          n_err(V_(usagestr) _USAGE_ARGS);
 717          goto jleave;
 718       case 'i':
 719          /* Ignore interrupts */
 720          ok_bset(ignore, TRU1);
 721          okey = "ignore";
 722          goto joarg;
 723       case 'L':
 724          Larg = _oarg;
 725          options |= OPT_HEADERLIST;
 726          if (*Larg == '"' || *Larg == '\'') { /* TODO list.c:listspec_check() */
 727             size_t j = strlen(++Larg);
 728             if (j > 0)
 729                Larg[j - 1] = '\0';
 730          }
 731          break;
 732       case 'N':
 733          /* Avoid initial header printing */
 734          ok_bset(header, FAL0);
 735          okey = "noheader";
 736          goto joarg;
 737       case 'n':
 738          /* Don't source "unspecified system start-up file" */
 739          options |= OPT_NOSRC;
 740          break;
 741       case 'O':
 742          /* Additional options to pass-through to MTA TODO v15-compat legacy */
 743          if (smopts_count == (size_t)smopts_size)
 744             smopts_size = _grow_cpp(&smopts, smopts_size + 8, smopts_count);
 745          smopts[smopts_count++] = _oarg;
 746          break;
 747       case 'q':
 748          /* Quote file TODO drop? -Q with real quote?? what ? */
 749          options |= OPT_SENDMODE;
 750          if (*_oarg != '-')
 751             qf = _oarg;
 752          break;
 753       case 'R':
 754          /* Open folders read-only */
 755          options |= OPT_R_FLAG;
 756          break;
 757       case 'r':
 758          /* Set From address. */
 759          options |= OPT_r_FLAG;
 760          if (_oarg[0] != '\0') {
 761             struct name *fa = nalloc(_oarg, GSKIN | GFULL | GFULLEXTRA);
 762
 763             if (is_addr_invalid(fa, EACM_STRICT | EACM_NOLOG)) {
 764                emsg = N_("Invalid address argument with -r");
 765                goto jusage;
 766             }
 767             option_r_arg = fa;
 768             /* TODO -r options is set in smopts, but may
 769              * TODO be overwritten by setting from= in
 770              * TODO an interactive session!
 771              * TODO Maybe disable setting of from?
 772              * TODO Warn user?  Update manual!! */
 773             okey = savecat("from=", fa->n_fullname);
 774             goto joarg;
 775          }
 776          break;
 777       case 'S':
 778          /* Set variable (twice) */
 779          {  char *a[2];
 780             okey = a[0] = _oarg;
 781             a[1] = NULL;
 782             c_set(a);
 783          }
 784 joarg:
 785          if (oargs_count == oargs_size)
 786             oargs_size = _grow_cpp(&oargs, oargs_size + 8, oargs_count);
 787          oargs[oargs_count++] = okey;
 788          break;
 789       case 's':
 790          /* Subject: */
 791          subject = _oarg;
 792          options |= OPT_SENDMODE;
 793          break;
 794       case 't':
 795          /* Read defined set of headers from mail to be send */
 796          options |= OPT_SENDMODE | OPT_t_FLAG;
 797          break;
 798       case 'u':
 799          /* Set user name to pretend to be; don't set OPT_u_FLAG yet, this is
 800           * done as necessary in _setup_vars() above */
 801          myname = _oarg;
 802          break;
 803       case 'V':
 804          puts(ok_vlook(version));
 805          exit(EXIT_OK);
 806          /* NOTREACHED */
 807       case 'v':
 808          /* Be verbose */
 809          ok_bset(verbose, TRU1);
 810          okey = "verbose";
 811          goto joarg;
 812       case 'X': {
 813             size_t l = strlen(_oarg);
 814             struct X_arg *nxp = smalloc(sizeof(*nxp) -
 815                   VFIELD_SIZEOF(struct X_arg, xa_cmd_buf) + l +1);
 816             if (X_head == NULL)
 817                X_head = nxp;
 818             else
 819                X_curr->xa_next = nxp;
 820             X_curr = nxp;
 821             nxp->xa_next = NULL;
 822             nxp->xa_cmd_len = l;
 823             memcpy(nxp->xa_cmd_buf, _oarg, l +1);
 824          }
 825          break;
 826       case '~':
 827          /* Enable tilde escapes even in non-interactive mode */
 828          options |= OPT_TILDE_FLAG;
 829          break;
 830       case '#':
 831          /* Work in batch mode, even if non-interactive */
 832          if (oargs_count + 6 >= oargs_size)
 833             oargs_size = _grow_cpp(&oargs, oargs_size + 8, oargs_count);
 834          /* xxx Setting most of the -# options immediately is useless, so be
 835           * selective in what is set immediately */
 836          options |= OPT_TILDE_FLAG | OPT_BATCH_FLAG;
 837          folder = "/dev/null";
 838          ok_bset(dot, TRU1);
 839          ok_bset(emptystart, TRU1);
 840          ok_bset(header, FAL0);
 841          ok_bset(quiet, TRU1);
 842          ok_bset(sendwait, TRU1);
 843          ok_vset(MBOX, folder);
 844          oargs[oargs_count + 0] = "dot";
 845          oargs[oargs_count + 1] = "emptystart";
 846          oargs[oargs_count + 2] = "noheader";
 847          oargs[oargs_count + 3] = "quiet";
 848          oargs[oargs_count + 4] = "sendwait";
 849          oargs[oargs_count + 5] = "MBOX=/dev/null";
 850          oargs_count += 6;
 851          break;
 852       case '.':
 853          options |= OPT_SENDMODE;
 854          goto jgetopt_done;
 855       case '?':
 856 jusage:
 857          if (emsg != NULL)
 858             n_err("%s\n", V_(emsg));
 859          n_err(V_(usagestr) _USAGE_ARGS);
 860 #undef _USAGE_ARGS
 861          exit_status = EXIT_USE;
 862          goto jleave;
 863       }
 864    }
 865 jgetopt_done:
 866    ;
 867
 868    /* The normal arguments may be followed by MTA arguments after a "--";
 869     * however, -f may take off an argument, too, and before that.
 870     * Since MTA arguments after "--" require *expandargv*, delay parsing off
 871     * those options until after the resource files are loaded... */
 872    if ((cp = argv[i = _oind]) == NULL)
 873       ;
 874    else if (cp[0] == '-' && cp[1] == '-' && cp[2] == '\0')
 875       ++i;
 876    /* OPT_BATCH_FLAG sets to /dev/null, but -f can still be used and sets & */
 877    else if (folder != NULL && folder[1] == '\0') {
 878       folder = cp;
 879       if ((cp = argv[++i]) != NULL) {
 880          if (cp[0] != '-' || cp[1] != '-' || cp[2] != '\0') {
 881             emsg = N_("More than one file given with -f");
 882             goto jusage;
 883          }
 884          ++i;
 885       }
 886    } else {
 887       options |= OPT_SENDMODE;
 888       for (;;) {
 889          to = cat(to, lextract(cp, GTO | GFULL));
 890          if ((cp = argv[++i]) == NULL)
 891             break;
 892          if (cp[0] == '-' && cp[1] == '-' && cp[2] == '\0') {
 893             ++i;
 894             break;
 895          }
 896       }
 897    }
 898    _oind = i;
 899
 900    /* ...BUT, since we use salloc() for the MTA smopts storage we need to
 901     * allocate the necessary space for them before we call spreserve()! */
 902    while (argv[i] != NULL)
 903       ++i;
 904    if (smopts_count + i > smopts_size)
 905       DBG(smopts_size =) _grow_cpp(&smopts, smopts_count + i + 1, smopts_count);
 906
 907    /* Check for inconsistent arguments */
 908    if (options & OPT_SENDMODE) {
 909       if (folder != NULL && !(options & OPT_BATCH_FLAG)) {
 910          emsg = N_("Cannot give -f and people to send to.");
 911          goto jusage;
 912       }
 913       if (myname != NULL) {
 914          emsg = N_("The -u option cannot be used in send mode");
 915          goto jusage;
 916       }
 917       if (!(options & OPT_t_FLAG) && to == NULL) {
 918          emsg = N_("Send options without primary recipient specified.");
 919          goto jusage;
 920       }
 921       if (options & OPT_EXISTONLY) {
 922          emsg = N_("The -e option cannot be used in send mode.");
 923          goto jusage;
 924       }
 925       if (options & (OPT_HEADERSONLY | OPT_HEADERLIST)) {
 926          emsg = N_("The -H and -L options cannot be used in send mode.");
 927          goto jusage;
 928       }
 929       if (options & OPT_R_FLAG) {
 930          emsg = N_("The -R option is meaningless in send mode.");
 931          goto jusage;
 932       }
 933    } else {
 934       if (folder != NULL && myname != NULL) {
 935          emsg = N_("The options -f and -u are mutually exclusive");
 936          goto jusage;
 937       }
 938       if ((options & OPT_EXISTONLY) &&
 939             (options & (OPT_HEADERSONLY | OPT_HEADERLIST))) {
 940          emsg = N_("The option -e is mutual exclusive with -H and -L");
 941          goto jusage;
 942       }
 943    }
 944
 945    /*
 946     * Likely to go, perform more setup
 947     */
 948
 949    _setup_vars();
 950
 951    if (options & OPT_INTERACTIVE) {
 952       _setscreensize(0);
 953 #ifdef SIGWINCH
 954 # ifndef TTY_WANTS_SIGWINCH
 955       if (safe_signal(SIGWINCH, SIG_IGN) != SIG_IGN)
 956 # endif
 957          safe_signal(SIGWINCH, _setscreensize);
 958 #endif
 959    } else
 960       scrnheight = realscreenheight = 24, scrnwidth = 80;
 961
 962    /* Snapshot our string pools.  Memory is auto-reclaimed from now on */
 963    spreserve();
 964
 965    if (!(options & OPT_NOSRC) && !env_blook("NAIL_NO_SYSTEM_RC", TRU1))
 966       load(SYSCONFDIR "/" SYSCONFRC);
 967    /* *expand() returns a savestr(), but load only uses the file name for
 968     * fopen(), so it's safe to do this */
 969    if ((cp = env_vlook("MAILRC", TRU1)) == NULL)
 970       cp = UNCONST(MAILRC);
 971    load(file_expand(cp));
 972    if (env_vlook("NAIL_EXTRA_RC", TRU1) == NULL &&
 973          (cp = ok_vlook(NAIL_EXTRA_RC)) != NULL)
 974       load(file_expand(cp));
 975
 976    /* We had to wait until the resource files are loaded but it is time to get
 977     * the termcap going, so that *term-ca-mode* won't hide our output for us */
 978 #ifdef HAVE_TERMCAP
 979    if ((options & (OPT_INTERACTIVE | OPT_QUICKRUN_MASK)) == OPT_INTERACTIVE)
 980       termcap_init(); /* TODO program state machine */
 981 #endif
 982
 983    /* Now we can set the account */
 984    if (Aarg != NULL) {
 985       char const *a[2];
 986       a[0] = Aarg;
 987       a[1] = NULL;
 988       c_account(a);
 989    }
 990
 991    /* Ensure the -S and other command line options take precedence over
 992     * anything that may have been placed in resource files.
 993     * Our "ternary binary" option *verbose* needs special treament */
 994    if ((options & (OPT_VERB | OPT_VERBVERB)) == OPT_VERB)
 995       options &= ~OPT_VERB;
 996    for (i = 0; UICMP(z, i, <, oargs_count); ++i) {
 997       char const *a[2];
 998       a[0] = oargs[i];
 999       a[1] = NULL;
1000       c_set(a);
1001    }
1002
1003    /* Additional options to pass-through to MTA, and allowed to do so? */
1004    if ((cp = ok_vlook(expandargv)) != NULL) {
1005       bool_t isfail = !asccasecmp(cp, "fail"),
1006          isrestrict = (!isfail && !asccasecmp(cp, "restrict"));
1007
1008       if ((cp = argv[i = _oind]) != NULL) {
1009          if (isfail ||
1010                (isrestrict && !(options & (OPT_INTERACTIVE |OPT_TILDE_FLAG)))) {
1011             n_err(_("*expandargv* doesn't allow MTA arguments; consider "
1012                "using *sendmail-arguments*\n"));
1013             exit_status = EXIT_USE | EXIT_SEND_ERROR;
1014             goto jleave;
1015          }
1016          do {
1017             assert(smopts_count + 1 <= smopts_size);
1018             smopts[smopts_count++] = cp;
1019          } while ((cp = argv[++i]) != NULL);
1020       }
1021    }
1022
1023    /*
1024     * We're finally completely setup and ready to go
1025     */
1026
1027    pstate |= PS_STARTED;
1028
1029    if (options & OPT_DEBUG)
1030       n_err(_("user = %s, homedir = %s\n"), myname, homedir);
1031
1032    if (!(options & OPT_SENDMODE)) {
1033       exit_status = _rcv_mode(folder, Larg, X_head);
1034       goto jleave;
1035    }
1036
1037    /* xxx exit_status = EXIT_OK; */
1038    if (X_head != NULL && !_X_arg_eval(X_head))
1039       goto jleave;
1040
1041    /* Now that full mailx(1)-style file expansion is possible handle the
1042     * attachments which we had delayed due to this.
1043     * This may use savestr(), but since we won't enter the command loop we
1044     * don't need to care about that */
1045    for (cp = NULL; a_head != NULL;) {
1046       struct attachment *nahp, *nap;
1047
1048       if ((nahp = add_attachment(attach, a_head->aa_file, &nap)) != NULL) {
1049          attach = nahp;
1050          /* Did we split a charset set name for fixation purposes? */
1051          if (cp != NULL) {
1052             nap->a_conv = AC_FIX_INCS;
1053             nap->a_input_charset = cp;
1054             cp = NULL;
1055          }
1056          a_head = a_head->aa_next;
1057          continue;
1058       }
1059       i = errno;
1060
1061       /* It may not have worked because of an appended character set name, so
1062        * try to split name and charset and retry once */
1063       if (cp == NULL && (cp = strrchr(a_head->aa_file, '=')) != NULL) {
1064          char *ncp, *nfp = savestrbuf(a_head->aa_file,
1065                PTR2SIZE(cp - a_head->aa_file));
1066
1067          for (ncp = ++cp; *ncp != '\0'; ++ncp)
1068             if (!alnumchar(*ncp) && !punctchar(*ncp))
1069                break;
1070          if (*ncp == '\0') {
1071             a_head->aa_file = nfp;
1072             continue;
1073          }
1074       }
1075
1076       n_perr(a_head->aa_file, i);
1077       exit_status = EXIT_ERR;
1078       goto jleave;
1079    }
1080
1081    if (options & OPT_INTERACTIVE)
1082       tty_init();
1083    mail(to, cc, bcc, subject, attach, qf, ((options & OPT_F_FLAG) != 0));
1084    if (options & OPT_INTERACTIVE)
1085       tty_destroy();
1086
1087 jleave:
1088 #ifdef HAVE_TERMCAP
1089    if (options & OPT_INTERACTIVE)
1090       termcap_destroy();
1091 #endif
1092 #ifdef HAVE_DEBUG
1093    sreset(FAL0);
1094    smemcheck();
1095 #endif
1096    NYD_LEAVE;
1097    return exit_status;
1098 }
1099
1100 FL int
1101 c_rexit(void *v) /* TODO program state machine */
1102 {
1103    UNUSED(v);
1104    NYD_ENTER;
1105
1106    if (!(pstate & PS_SOURCING)) {
1107 #ifdef HAVE_TERMCAP
1108       if (options & OPT_INTERACTIVE)
1109          termcap_destroy();
1110 #endif
1111       exit(EXIT_OK);
1112    }
1113    NYD_LEAVE;
1114    return 1;
1115 }
1116
1117 /* Source the others in that case! */
1118 #ifdef HAVE_AMALGAMATION
1119 # include "config.h"
1120 #endif
1121
1122 /* s-it-mode */