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