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 ui16_t const      class_char[1 + 0x7F] = {
  68 #define a_BC C_BLANK | C_CNTRL
  69 #define a_SC C_SPACE | C_CNTRL
  70 #define a_WC C_WHITE | C_CNTRL
  71 /* 000 nul  001 soh  002 stx  003 etx  004 eot  005 enq  006 ack  007 bel */
  72    C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL,
  73 /* 010 bs   011 ht   012 nl   013 vt   014 np   015 cr   016 so   017 si */
  74    C_CNTRL, a_BC,    a_WC,    a_SC,    a_SC,    a_SC,    C_CNTRL, C_CNTRL,
  75 /* 020 dle  021 dc1  022 dc2  023 dc3  024 dc4  025 nak  026 syn  027 etb */
  76    C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL,
  77 /* 030 can  031 em   032 sub  033 esc  034 fs   035 gs   036 rs   037 us */
  78    C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL, C_CNTRL,
  79 #undef a_WC
  80 #undef a_SC
  81 #undef a_BC
  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 /* Setup some variables which we require to be valid / verified */
 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
 137 /* Interrupt printing of the headers */
 138 static void    _hdrstop(int signo);
 139
 140 static int
 141 _getopt(int argc, char * const argv[], char const *optstring)
 142 {
 143    static char const *lastp;
 144
 145    int rv = -1/*, colon*/;
 146    char const *curp;
 147    NYD_ENTER;
 148
 149    _oarg = NULL;
 150
 151    /*if ((colon = (optstring[0] == ':')))
 152       ++optstring;*/
 153
 154    if (lastp != NULL) {
 155       curp = lastp;
 156       lastp = NULL;
 157    } else {
 158       if (_oind >= argc || argv[_oind] == NULL || argv[_oind][0] != '-' ||
 159             argv[_oind][1] == '\0')
 160          goto jleave;
 161       if (argv[_oind][1] == '-' && argv[_oind][2] == '\0') {
 162          /* We need this in for MTA arg detection (easier) ++_oind;*/
 163          goto jleave;
 164       }
 165       curp = &argv[_oind][1];
 166    }
 167
 168    for(_oopt = curp[0]; optstring[0] != '\0';){
 169       if(optstring[0] != _oopt){
 170          optstring += 1 + (optstring[1] == ':');
 171          continue;
 172       }
 173
 174       if (optstring[1] == ':') {
 175          if (curp[1] != '\0') {
 176             _oarg = UNCONST(curp + 1);
 177             ++_oind;
 178          } else {
 179             if ((_oind += 2) > argc) {
 180                /*if (!colon *//*&& _oerr*//*)*/ {
 181                   n_err(_("%s: option requires an argument -- %c\n"),
 182                      argv[0], (char)_oopt);
 183                }
 184                rv = (/*colon ? ':' :*/ '?');
 185                goto jleave;
 186             }
 187             _oarg = argv[_oind - 1];
 188          }
 189       } else {
 190          if (curp[1] != '\0')
 191             lastp = curp + 1;
 192          else
 193             ++_oind;
 194       }
 195       rv = _oopt;
 196       goto jleave;
 197    }
 198
 199    /* Special support for --help, which is quite common */
 200    if (_oopt == '-' && !strcmp(curp, "-help") && curp - 1 == argv[_oind]) {
 201       ++_oind;
 202       rv = 'h';
 203       goto jleave;
 204    }
 205
 206    /* Definitive error */
 207    /*if (!colon *//*&& opterr*//*)*/
 208       n_err(_("%s: invalid option -- %c\n"), argv[0], _oopt);
 209    if (curp[1] != '\0')
 210       lastp = curp + 1;
 211    else
 212       ++_oind;
 213    _oarg = NULL;
 214    rv = '?';
 215 jleave:
 216    NYD_LEAVE;
 217    return rv;
 218 }
 219
 220 static void
 221 _startup(void)
 222 {
 223    char *cp;
 224    NYD_ENTER;
 225
 226    image = -1;
 227    dflpipe = SIG_DFL;
 228    _oind = /*_oerr =*/ 1;
 229
 230    if ((cp = strrchr(progname, '/')) != NULL)
 231       progname = ++cp;
 232
 233    /* Set up a reasonable environment */
 234
 235 #ifdef HAVE_NYD
 236    safe_signal(SIGABRT, &_nyd_oncrash);
 237 # ifdef SIGBUS
 238    safe_signal(SIGBUS, &_nyd_oncrash);
 239 # endif
 240    safe_signal(SIGFPE, &_nyd_oncrash);
 241    safe_signal(SIGILL, &_nyd_oncrash);
 242    safe_signal(SIGSEGV, &_nyd_oncrash);
 243 #endif
 244    command_manager_start();
 245
 246    if (isatty(STDIN_FILENO)) /* TODO should be isatty(0) && isatty(2)?? */
 247       options |= OPT_TTYIN;
 248    if (isatty(STDOUT_FILENO))
 249       options |= OPT_TTYOUT;
 250    if ((options & (OPT_TTYIN | OPT_TTYOUT)) == (OPT_TTYIN | OPT_TTYOUT)) {
 251       options |= OPT_INTERACTIVE;
 252       safe_signal(SIGPIPE, dflpipe = SIG_IGN);
 253    }
 254
 255    /*  --  >8  --  8<  --  */
 256
 257 #ifdef HAVE_SETLOCALE
 258    setlocale(LC_ALL, "");
 259    mb_cur_max = MB_CUR_MAX;
 260 # ifdef HAVE_NL_LANGINFO
 261    if (ok_vlook(ttycharset) == NULL && (cp = nl_langinfo(CODESET)) != NULL)
 262       ok_vset(ttycharset, cp);
 263 # endif
 264
 265 # ifdef HAVE_C90AMEND1
 266    if (mb_cur_max > 1) {
 267       wchar_t  wc;
 268       if (mbtowc(&wc, "\303\266", 2) == 2 && wc == 0xF6 &&
 269             mbtowc(&wc, "\342\202\254", 3) == 3 && wc == 0x20AC)
 270          options |= OPT_UNICODE;
 271       /* Reset possibly messed up state; luckily this also gives us an
 272        * indication wether the encoding has locking shift state sequences */
 273       /* TODO temporary - use option bits! */
 274       if (mbtowc(&wc, NULL, mb_cur_max))
 275          options |= OPT_ENC_MBSTATE;
 276    }
 277 # endif
 278 #else
 279    mb_cur_max = 1;
 280 #endif
 281
 282 #ifdef HAVE_ICONV
 283    iconvd = (iconv_t)-1;
 284 #endif
 285    NYD_LEAVE;
 286 }
 287
 288 static size_t
 289 _grow_cpp(char const ***cpp, size_t newsize, size_t oldcnt)
 290 {
 291    /* Before spreserve(): use our string pool instead of LibC heap */
 292    char const **newcpp;
 293    NYD_ENTER;
 294
 295    newcpp = salloc(sizeof(char*) * newsize);
 296
 297    if (oldcnt > 0)
 298       memcpy(newcpp, *cpp, oldcnt * sizeof(char*));
 299    *cpp = newcpp;
 300    NYD_LEAVE;
 301    return newsize;
 302 }
 303
 304 static void
 305 _setup_vars(void){
 306    /* XXX furtherly check paths? */
 307    struct passwd *pwuid;
 308    char const *cp;
 309    NYD_ENTER;
 310
 311    group_id = getgid();
 312    if((pwuid = getpwuid(user_id = getuid())) == NULL)
 313       n_panic(_("Cannot associate a name with uid %lu"), (ul_i)user_id);
 314    myname = savestr(pwuid->pw_name); /* XXX replace uses with vlook(LOGNAME)! */
 315
 316    /* C99 */{
 317       char const *ep;
 318       bool_t doenv;
 319
 320       if(!(doenv = (ep = ok_vlook(LOGNAME)) == NULL) &&
 321             (doenv = strcmp(myname, ep)))
 322          n_err(_("Warning: $LOGNAME=\"%s\" not identical to user (\"%s\")!\n"),
 323             ep, myname);
 324       if(doenv){
 325          pstate |= PS_ROOT;
 326          ok_vset(LOGNAME, myname);
 327          pstate &= ~PS_ROOT;
 328       }
 329
 330       if((ep = ok_vlook(USER)) != NULL && strcmp(myname, ep)){
 331          n_err(_("Warning: $USER=\"%s\" not identical to user (\"%s\")!\n"),
 332             ep, myname);
 333          pstate |= PS_ROOT;
 334          ok_vset(USER, myname);
 335          pstate &= ~PS_ROOT;
 336       }
 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 = pwuid->pw_dir;
 344       pstate |= PS_ROOT;
 345       ok_vset(HOME, cp);
 346       pstate &= ~PS_ROOT;
 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
 372       /* We manage those variables for our child processes, so ensure they
 373        * are up to date, always */
 374       if (options & OPT_INTERACTIVE)
 375          pstate |= PS_SIGWINCH_PEND;
 376
 377       if ((cp = ok_vlook(LINES)) != NULL)
 378          scrnheight = realscreenheight = (int)strtoul(cp, NULL, 0); /* TODO */
 379       if ((cp = ok_vlook(COLUMNS)) != NULL)
 380          scrnwidth = (int)strtoul(cp, NULL, 0); /* TODO posui32= not posnum=! */
 381
 382       if (scrnwidth != 0 && scrnheight != 0)
 383          goto jleave;
 384    }
 385
 386 #ifdef TIOCGWINSZ
 387    if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1)
 388       ws.ws_col = ws.ws_row = 0;
 389 #elif defined TIOCGSIZE
 390    if (ioctl(STDOUT_FILENO, TIOCGSIZE, &ws) == -1)
 391       ts.ts_lines = ts.ts_cols = 0;
 392 #endif
 393
 394    if (scrnheight == 0) {
 395       speed_t ospeed = ((tcgetattr(STDOUT_FILENO, &tbuf) == -1)
 396             ? B9600 : cfgetospeed(&tbuf));
 397
 398       if (ospeed < B1200)
 399          scrnheight = 9;
 400       else if (ospeed == B1200)
 401          scrnheight = 14;
 402 #ifdef TIOCGWINSZ
 403       else if (ws.ws_row != 0)
 404          scrnheight = ws.ws_row;
 405 #elif defined TIOCGSIZE
 406       else if (ts.ts_lines != 0)
 407          scrnheight = ts.ts_lines;
 408 #endif
 409       else
 410          scrnheight = 24;
 411
 412 #if defined TIOCGWINSZ || defined TIOCGSIZE
 413       if (0 ==
 414 # ifdef TIOCGWINSZ
 415             (realscreenheight = ws.ws_row)
 416 # else
 417             (realscreenheight = ts.ts_lines)
 418 # endif
 419       )
 420          realscreenheight = 24;
 421 #endif
 422    }
 423
 424    if (scrnwidth == 0 && 0 ==
 425 #ifdef TIOCGWINSZ
 426          (scrnwidth = ws.ws_col)
 427 #elif defined TIOCGSIZE
 428          (scrnwidth = ts.ts_cols)
 429 #endif
 430    )
 431       scrnwidth = 80;
 432
 433 jleave:
 434 #ifdef SIGWINCH
 435    if (is_sighdl) {
 436       pstate |= PS_SIGWINCH_PEND; /* XXX Not atomic */
 437       if (options & OPT_INTERACTIVE)
 438          n_tty_signal(SIGWINCH);
 439    }
 440 #endif
 441    NYD_LEAVE;
 442 }
 443
 444 static sigjmp_buf __hdrjmp; /* XXX */
 445
 446 static int
 447 _rcv_mode(char const *folder, char const *Larg)
 448 {
 449    int i;
 450    sighandler_type prevint;
 451    NYD_ENTER;
 452
 453    if (folder == NULL)
 454       folder = "%";
 455
 456    if (options & OPT_QUICKRUN_MASK)
 457       i = FEDIT_RDONLY;
 458    else
 459       i = FEDIT_NONE;
 460    i = setfile(folder, i);
 461    if (i < 0) {
 462       exit_status = EXIT_ERR; /* error already reported */
 463       goto jquit;
 464    }
 465    if (options & OPT_QUICKRUN_MASK) {
 466       exit_status = i;
 467       if (i == EXIT_OK && (!(options & OPT_EXISTONLY) ||
 468             (options & OPT_HEADERLIST)))
 469          print_header_summary(Larg);
 470       goto jquit;
 471    }
 472    check_folder_hook(FAL0);
 473
 474    if (i > 0 && !ok_blook(emptystart)) {
 475       exit_status = EXIT_ERR;
 476       goto jleave;
 477    }
 478
 479    if (sigsetjmp(__hdrjmp, 1) == 0) {
 480       if ((prevint = safe_signal(SIGINT, SIG_IGN)) != SIG_IGN)
 481          safe_signal(SIGINT, _hdrstop);
 482       if (!(options & OPT_N_FLAG)) {
 483          if (!ok_blook(quiet))
 484             printf(_("%s version %s.  Type ? for help.\n"),
 485                (ok_blook(bsdcompat) ? "Mail" : uagent), ok_vlook(version));
 486          announce(1);
 487          fflush(stdout);
 488       }
 489       safe_signal(SIGINT, prevint);
 490    }
 491
 492    /* Enter the command loop */
 493    if (options & OPT_INTERACTIVE)
 494       n_tty_init();
 495    n_commands();
 496    if (options & OPT_INTERACTIVE)
 497       n_tty_destroy();
 498
 499    if (mb.mb_type == MB_FILE || mb.mb_type == MB_MAILDIR) {
 500       safe_signal(SIGHUP, SIG_IGN);
 501       safe_signal(SIGINT, SIG_IGN);
 502       safe_signal(SIGQUIT, SIG_IGN);
 503    }
 504 jquit:
 505    save_mbox_for_possible_quitstuff();
 506    quit();
 507 jleave:
 508    NYD_LEAVE;
 509    return exit_status;
 510 }
 511
 512 static void
 513 _hdrstop(int signo)
 514 {
 515    NYD_X; /* Signal handler */
 516    UNUSED(signo);
 517
 518    fflush(stdout);
 519    n_err_sighdl(_("\nInterrupt\n"));
 520    siglongjmp(__hdrjmp, 1);
 521 }
 522
 523 int
 524 main(int argc, char *argv[]){
 525    static char const optstr[] = "A:a:Bb:c:dEeFfHhiL:NnO:q:Rr:S:s:tu:VvX:::~#.",
 526       usagestr[] = N_(
 527          "Synopsis:\n"
 528          "  %s -h | --help\n"
 529          "  %s [-BdEFintv~] [-: spec] [-A account]\n"
 530          "\t [-a attachment] [-b bcc-address] [-c cc-address]\n"
 531          "\t [-q file] [-r from-address] [-S var[=value]..]\n"
 532          "\t [-s subject] [-X cmd] [-.] to-address.. [-- mta-option..]\n"
 533          "  %s [-BdEeHiNnRv~] [-: spec] [-A account]\n"
 534          "\t [-L spec-list] [-r from-address] [-S var[=value]..]\n"
 535          "\t [-u user] [-X cmd] [-- mta-option..]\n"
 536          "  %s [-BdEeHiNnRv~#] [-: spec] [-A account] -f\n"
 537          "\t [-L spec-list] [-r from-address] [-S var[=value]..]\n"
 538          "\t [-X cmd] [file] [-- mta-option..]\n"
 539       );
 540 #define _USAGE_ARGS , progname, progname, progname, progname
 541
 542    struct a_arg *a_head, *a_curr;
 543    struct name *to, *cc, *bcc;
 544    struct attachment *attach;
 545    char *cp, *subject, *qf, *Aarg, *Larg;
 546    char const *okey, **oargs, **Xargs, *folder, *emsg;
 547    size_t oargs_size, oargs_cnt, Xargs_size, Xargs_cnt, smopts_size;
 548    enum{
 549       a_RF_NONE = 0,
 550       a_RF_SET = 1<<0,
 551       a_RF_SYSTEM = 1<<1,
 552       a_RF_USER = 1<<2,
 553       a_RF_ALL = a_RF_SYSTEM | a_RF_USER
 554    } resfiles;
 555    int i;
 556    NYD_ENTER;
 557
 558    a_head = NULL;
 559    UNINIT(a_curr, NULL);
 560    to = cc = bcc = NULL;
 561    attach = NULL;
 562    cp = subject = qf =
 563          Aarg = Larg = NULL;
 564    oargs = Xargs = NULL;
 565    folder = emsg = NULL;
 566    oargs_size = oargs_cnt = Xargs_size = Xargs_cnt = smopts_size = 0;
 567    resfiles = a_RF_ALL;
 568
 569    /*
 570     * Start our lengthy setup, finalize by setting PS_STARTED
 571     */
 572
 573    progname = argv[0];
 574    _startup();
 575
 576    /* Command line parsing
 577     * Variable settings need to be done twice, since the user surely wants the
 578     * setting to take effect immediately, but also doesn't want it to be
 579     * overwritten from within resource files */
 580    while ((i = _getopt(argc, argv, optstr)) >= 0) {
 581       switch (i) {
 582       case 'A':
 583          /* Execute an account command later on */
 584          Aarg = _oarg;
 585          break;
 586       case 'a':
 587          options |= OPT_SENDMODE;
 588          {  struct a_arg *nap = salloc(sizeof(struct a_arg));
 589             if (a_head == NULL)
 590                a_head = nap;
 591             else
 592                a_curr->aa_next = nap;
 593             nap->aa_next = NULL;
 594             nap->aa_file = _oarg;
 595             a_curr = nap;
 596          }
 597          break;
 598       case 'B':
 599          /* Make 0/1 line buffered */
 600          setvbuf(stdin, NULL, _IOLBF, 0);
 601          setvbuf(stdout, NULL, _IOLBF, 0);
 602          break;
 603       case 'b':
 604          /* Get Blind Carbon Copy Recipient list */
 605          options |= OPT_SENDMODE;
 606          bcc = cat(bcc, lextract(_oarg, GBCC | GFULL));
 607          break;
 608       case 'c':
 609          /* Get Carbon Copy Recipient list */
 610          options |= OPT_SENDMODE;
 611          cc = cat(cc, lextract(_oarg, GCC | GFULL));
 612          break;
 613       case 'd':
 614          ok_bset(debug, TRU1);
 615          okey = "debug";
 616          goto joarg;
 617       case 'E':
 618          ok_bset(skipemptybody, TRU1);
 619          okey = "skipemptybody";
 620          goto joarg;
 621       case 'e':
 622          options |= OPT_EXISTONLY;
 623          break;
 624       case 'F':
 625          options |= OPT_F_FLAG | OPT_SENDMODE;
 626          break;
 627       case 'f':
 628          /* User is specifying file to "edit" with Mail, as opposed to reading
 629           * system mailbox.  If no argument is given, we read his mbox file.
 630           * Check for remaining arguments later */
 631          folder = "&";
 632          break;
 633       case 'H':
 634          options |= OPT_HEADERSONLY;
 635          break;
 636       case 'h':
 637          n_err(V_(usagestr) _USAGE_ARGS);
 638          goto j_leave;
 639       case 'i':
 640          /* Ignore interrupts */
 641          ok_bset(ignore, TRU1);
 642          okey = "ignore";
 643          goto joarg;
 644       case 'L':
 645          Larg = _oarg;
 646          options |= OPT_HEADERLIST;
 647          if (*Larg == '"' || *Larg == '\'') { /* TODO list.c:listspec_check() */
 648             size_t j = strlen(++Larg);
 649             if (j > 0)
 650                Larg[j - 1] = '\0';
 651          }
 652          break;
 653       case 'N':
 654          /* Avoid initial header printing */
 655          ok_bset(header, FAL0);
 656          okey = "noheader";
 657          goto joarg;
 658       case 'n':
 659          /* Don't source "unspecified system start-up file" */
 660          if(resfiles & a_RF_SET){
 661             emsg = N_("-n cannot be used in conjunction with -:");
 662             goto jusage;
 663          }
 664          resfiles = a_RF_USER;
 665          break;
 666       case 'O':
 667          /* Additional options to pass-through to MTA TODO v15-compat legacy */
 668          if (smopts_cnt == smopts_size)
 669             smopts_size = _grow_cpp(&smopts, smopts_size + 8, smopts_cnt);
 670          smopts[smopts_cnt++] = _oarg;
 671          break;
 672       case 'q':
 673          /* Quote file TODO drop? -Q with real quote?? what ? */
 674          options |= OPT_SENDMODE;
 675          /* Allow for now, we have to special check validity of -q- later on! */
 676          qf = (_oarg[0] == '-' && _oarg[1] == '\0') ? (char*)-1 : _oarg;
 677          break;
 678       case 'R':
 679          /* Open folders read-only */
 680          options |= OPT_R_FLAG;
 681          break;
 682       case 'r':
 683          /* Set From address. */
 684          options |= OPT_r_FLAG;
 685          if (_oarg[0] != '\0') {
 686             struct name *fa = nalloc(_oarg, GSKIN | GFULL | GFULLEXTRA);
 687
 688             if (is_addr_invalid(fa, EACM_STRICT | EACM_NOLOG)) {
 689                emsg = N_("Invalid address argument with -r");
 690                goto jusage;
 691             }
 692             option_r_arg = fa;
 693             /* TODO -r options is set in smopts, but may
 694              * TODO be overwritten by setting from= in
 695              * TODO an interactive session!
 696              * TODO Maybe disable setting of from?
 697              * TODO Warn user?  Update manual!! */
 698             okey = savecat("from=", fa->n_fullname);
 699             goto joarg;
 700          }
 701          break;
 702       case 'S':
 703          /* Set variable (twice) */
 704          {  char *a[2];
 705             okey = a[0] = _oarg;
 706             a[1] = NULL;
 707             c_set(a);
 708          }
 709 joarg:
 710          if (oargs_cnt == oargs_size)
 711             oargs_size = _grow_cpp(&oargs, oargs_size + 8, oargs_cnt);
 712          oargs[oargs_cnt++] = okey;
 713          break;
 714       case 's':
 715          /* Subject: */
 716          subject = _oarg;
 717          options |= OPT_SENDMODE;
 718          break;
 719       case 't':
 720          /* Read defined set of headers from mail to be sent */
 721          options |= OPT_SENDMODE | OPT_t_FLAG;
 722          break;
 723       case 'u':
 724          /* Temporarily set myname so that we can recognize the -u condition */
 725          myname = savecat("%", _oarg);
 726          break;
 727       case 'V':
 728          puts(ok_vlook(version));
 729          exit(EXIT_OK);
 730          /* NOTREACHED */
 731       case 'v':
 732          /* Be verbose */
 733          ok_bset(verbose, TRU1);
 734          okey = "verbose";
 735          goto joarg;
 736       case 'X':
 737          /* Add to list of commands to exec before entering normal operation */
 738          if (Xargs_cnt == Xargs_size)
 739             Xargs_size = _grow_cpp(&Xargs, Xargs_size + 8, Xargs_cnt);
 740          Xargs[Xargs_cnt++] = _oarg;
 741          break;
 742       case ':':
 743          /* Control which resource files shall be loaded */
 744          if(!(resfiles & (a_RF_SET | a_RF_SYSTEM))){
 745             emsg = N_("-n cannot be used in conjunction with -:");
 746             goto jusage;
 747          }
 748          resfiles = a_RF_SET;
 749          while((i = *_oarg++) != '\0')
 750             switch(i){
 751             case 'S': case 's': resfiles |= a_RF_SYSTEM; break;
 752             case 'U': case 'u': resfiles |= a_RF_USER; break;
 753             case ':': case '/': resfiles &= ~a_RF_ALL; break;
 754             default:
 755                emsg = N_("Invalid argument of -:");
 756                goto jusage;
 757             }
 758          break;
 759       case '~':
 760          /* Enable tilde escapes even in non-interactive mode */
 761          options |= OPT_TILDE_FLAG;
 762          break;
 763       case '#':
 764          /* Work in batch mode, even if non-interactive */
 765          if (oargs_cnt + 5 >= oargs_size)
 766             oargs_size = _grow_cpp(&oargs, oargs_size + 8, oargs_cnt);
 767          options |= OPT_TILDE_FLAG | OPT_BATCH_FLAG;
 768          folder = "/dev/null";
 769          ok_bset(emptystart, TRU1);
 770          ok_bset(header, FAL0);
 771          ok_bset(quiet, TRU1);
 772          ok_bset(sendwait, TRU1);
 773          ok_vset(MBOX, folder);
 774          oargs[oargs_cnt + 0] = "emptystart";
 775          oargs[oargs_cnt + 1] = "noheader";
 776          oargs[oargs_cnt + 2] = "quiet";
 777          oargs[oargs_cnt + 3] = "sendwait";
 778          oargs[oargs_cnt + 4] = "MBOX=/dev/null";
 779          oargs_cnt += 5;
 780          break;
 781       case '.':
 782          options |= OPT_SENDMODE;
 783          goto jgetopt_done;
 784       case '?':
 785 jusage:
 786          if (emsg != NULL)
 787             n_err("%s\n", V_(emsg));
 788          n_err(V_(usagestr) _USAGE_ARGS);
 789 #undef _USAGE_ARGS
 790          exit_status = EXIT_USE;
 791          goto j_leave;
 792       }
 793    }
 794 jgetopt_done:
 795    ;
 796
 797    /* The normal arguments may be followed by MTA arguments after a "--";
 798     * however, -f may take off an argument, too, and before that.
 799     * Since MTA arguments after "--" require *expandargv*, delay parsing off
 800     * those options until after the resource files are loaded... */
 801    if ((cp = argv[i = _oind]) == NULL)
 802       ;
 803    else if (cp[0] == '-' && cp[1] == '-' && cp[2] == '\0')
 804       ++i;
 805    /* OPT_BATCH_FLAG sets to /dev/null, but -f can still be used and sets & */
 806    else if (folder != NULL && /*folder[0] == '&' &&*/ folder[1] == '\0') {
 807       folder = cp;
 808       if ((cp = argv[++i]) != NULL) {
 809          if (cp[0] != '-' || cp[1] != '-' || cp[2] != '\0') {
 810             emsg = N_("More than one file given with -f");
 811             goto jusage;
 812          }
 813          ++i;
 814       }
 815    } else {
 816       options |= OPT_SENDMODE;
 817       for (;;) {
 818          to = cat(to, lextract(cp, GTO | GFULL));
 819          if ((cp = argv[++i]) == NULL)
 820             break;
 821          if (cp[0] == '-' && cp[1] == '-' && cp[2] == '\0') {
 822             ++i;
 823             break;
 824          }
 825       }
 826    }
 827    _oind = i;
 828
 829    /* ...BUT, since we use salloc() for the MTA smopts storage we need to
 830     * allocate the necessary space for them before we call spreserve()! */
 831    while (argv[i] != NULL)
 832       ++i;
 833    if (smopts_cnt + i > smopts_size)
 834       DBG(smopts_size =) _grow_cpp(&smopts, smopts_cnt + i + 1, smopts_cnt);
 835
 836    /* Check for inconsistent arguments, fix some temporaries */
 837    if (options & OPT_SENDMODE) {
 838       /* XXX This is only because BATCH_FLAG sets *folder*=/dev/null
 839        * XXX in order to function.  Ideally that would not be needed */
 840       if (folder != NULL && !(options & OPT_BATCH_FLAG)) {
 841          emsg = N_("Cannot give -f and people to send to.");
 842          goto jusage;
 843       }
 844       if (myname != NULL) {
 845          emsg = N_("The -u option cannot be used in send mode");
 846          goto jusage;
 847       }
 848       if (!(options & OPT_t_FLAG) && to == NULL) {
 849          emsg = N_("Send options without primary recipient specified.");
 850          goto jusage;
 851       }
 852       if ((options & OPT_t_FLAG) && qf != NULL) {
 853          emsg = N_("-t and -q are mutual exclusive.");
 854          goto jusage;
 855       }
 856       if (options & (OPT_EXISTONLY | OPT_HEADERSONLY | OPT_HEADERLIST)) {
 857          emsg = N_("The -e, -H and -L options cannot be used in send mode.");
 858          goto jusage;
 859       }
 860       if (options & OPT_R_FLAG) {
 861          emsg = N_("The -R option is meaningless in send mode.");
 862          goto jusage;
 863       }
 864    } else {
 865       if (myname != NULL && folder != NULL) {
 866          emsg = N_("The options -u and -f (and -#) are mutually exclusive");
 867          goto jusage;
 868       }
 869       if ((options & (OPT_EXISTONLY | OPT_HEADERSONLY)) ==
 870             (OPT_EXISTONLY | OPT_HEADERSONLY)) {
 871          emsg = N_("The options -e and -H are mutual exclusive");
 872          goto jusage;
 873       }
 874       if ((options & (OPT_HEADERSONLY | OPT_HEADERLIST)) == /* TODO OBSOLETE */
 875             (OPT_HEADERSONLY | OPT_HEADERLIST))
 876          OBSOLETE(_("please use \"-e -L xy\" instead of \"-H -L xy\""));
 877
 878       if(myname != NULL)
 879          folder = myname;
 880    }
 881
 882    /*
 883     * Likely to go, perform more setup
 884     */
 885
 886    _setup_vars();
 887
 888    if (options & OPT_INTERACTIVE) {
 889       /* Now we can finally check wether -q- was given */
 890       if (qf == (char*)-1) {
 891          emsg = N_("In interactive mode -q cannot use standard input \"-\"\n");
 892          goto jusage;
 893       }
 894
 895       _setscreensize(0);
 896 #ifdef SIGWINCH
 897 # ifndef TTY_WANTS_SIGWINCH
 898       if (safe_signal(SIGWINCH, SIG_IGN) != SIG_IGN)
 899 # endif
 900          safe_signal(SIGWINCH, &_setscreensize);
 901 #endif
 902    } else
 903       scrnheight = realscreenheight = 24, scrnwidth = 80;
 904
 905    /* Snapshot our string pools.  Memory is auto-reclaimed from now on */
 906    spreserve();
 907
 908    /* load() any resource files */
 909    if(resfiles & a_RF_ALL){
 910       /* *expand() returns a savestr(), but load only uses the file name for
 911        * fopen(), so it's safe to do this */
 912       if((resfiles & a_RF_SYSTEM) && !ok_blook(NAIL_NO_SYSTEM_RC))
 913          n_load(SYSCONFDIR "/" SYSCONFRC);
 914       if(resfiles & a_RF_USER)
 915          n_load(file_expand(ok_vlook(MAILRC)));
 916       if((cp = ok_vlook(NAIL_EXTRA_RC)) != NULL)
 917          n_load(file_expand(cp));
 918    }
 919
 920    /* Ensure the -S and other command line options take precedence over
 921     * anything that may have been placed in resource files.
 922     * Our "ternary binary" option *verbose* needs special treament */
 923    if ((options & (OPT_VERB | OPT_VERBVERB)) == OPT_VERB)
 924       options &= ~OPT_VERB;
 925    /* ..and be silent when unsetting an undefined variable */
 926    pstate |= PS_ROBOT;
 927    for (i = 0; UICMP(z, i, <, oargs_cnt); ++i) {
 928       char const *a[2];
 929       a[0] = oargs[i];
 930       a[1] = NULL;
 931       c_set(a);
 932    }
 933    pstate &= ~PS_ROBOT;
 934
 935    /* Additional options to pass-through to MTA, and allowed to do so? */
 936    if ((cp = ok_vlook(expandargv)) != NULL) {
 937       bool_t isfail = !asccasecmp(cp, "fail"),
 938          isrestrict = (!isfail && !asccasecmp(cp, "restrict"));
 939
 940       if ((options & OPT_D_V) && !isfail && !isrestrict && *cp != '\0')
 941          n_err(_("Unknown *expandargv* value: \"%s\"\n"), cp);
 942
 943       if ((cp = argv[i = _oind]) != NULL) {
 944          if (isfail ||
 945                (isrestrict && !(options & (OPT_INTERACTIVE |OPT_TILDE_FLAG)))) {
 946             n_err(_("*expandargv* doesn't allow MTA arguments; consider "
 947                "using *sendmail-arguments*\n"));
 948             exit_status = EXIT_USE | EXIT_SEND_ERROR;
 949             goto jleave;
 950          }
 951          do {
 952             assert(smopts_cnt + 1 <= smopts_size);
 953             smopts[smopts_cnt++] = cp;
 954          } while ((cp = argv[++i]) != NULL);
 955       }
 956    }
 957
 958    /* We had to wait until the resource files are loaded and any command line
 959     * setting has been restored, but get the termcap up and going before we
 960     * switch account or running commands */
 961 #ifdef n_HAVE_TCAP
 962    if((options & (OPT_INTERACTIVE | OPT_QUICKRUN_MASK)) == OPT_INTERACTIVE)
 963       n_termcap_init();
 964 #endif
 965
 966    /* Now we can set the account */
 967    if (Aarg != NULL) {
 968       char const *a[2];
 969       a[0] = Aarg;
 970       a[1] = NULL;
 971       c_account(a);
 972    }
 973
 974    /* "load()" commands given on command line */
 975    if (Xargs_cnt > 0){
 976       Xargs[Xargs_cnt] = NULL;
 977       n_load_Xargs(Xargs);
 978    }
 979
 980    /*
 981     * We're finally completely setup and ready to go
 982     */
 983    pstate |= PS_STARTED;
 984
 985    if (!(options & OPT_SENDMODE)) {
 986       exit_status = _rcv_mode(folder, Larg);
 987       goto jleave;
 988    }
 989
 990    /* Now that full mailx(1)-style file expansion is possible handle the
 991     * attachments which we had delayed due to this.
 992     * This may use savestr(), but since we won't enter the command loop we
 993     * don't need to care about that */
 994    for (cp = NULL; a_head != NULL;) {
 995       struct attachment *nahp, *nap;
 996
 997       if ((nahp = add_attachment(attach, a_head->aa_file, &nap)) != NULL) {
 998          attach = nahp;
 999          /* Did we split a charset set name for fixation purposes? */
1000          if (cp != NULL) {
1001             nap->a_conv = AC_FIX_INCS;
1002             nap->a_input_charset = cp;
1003             cp = NULL;
1004          }
1005          a_head = a_head->aa_next;
1006          continue;
1007       }
1008       i = errno;
1009
1010       /* It may not have worked because of an appended character set name, so
1011        * try to split name and charset and retry once */
1012       if (cp == NULL && (cp = strrchr(a_head->aa_file, '=')) != NULL) {
1013          char *ncp, *nfp = savestrbuf(a_head->aa_file,
1014                PTR2SIZE(cp - a_head->aa_file));
1015
1016          for (ncp = ++cp; *ncp != '\0'; ++ncp)
1017             if (!alnumchar(*ncp) && !punctchar(*ncp))
1018                break;
1019          if (*ncp == '\0') {
1020             a_head->aa_file = nfp;
1021             continue;
1022          }
1023       }
1024
1025       n_perr(a_head->aa_file, i);
1026       exit_status = EXIT_ERR;
1027       goto jleave;
1028    }
1029
1030    if (options & OPT_INTERACTIVE)
1031       n_tty_init();
1032    mail(to, cc, bcc, subject, attach, qf, ((options & OPT_F_FLAG) != 0));
1033    if (options & OPT_INTERACTIVE)
1034       n_tty_destroy();
1035
1036 jleave:
1037 #ifdef n_HAVE_TCAP
1038    if((options & (OPT_INTERACTIVE | OPT_QUICKRUN_MASK)) == OPT_INTERACTIVE)
1039       n_termcap_destroy();
1040 #endif
1041 #ifdef HAVE_MEMORY_DEBUG
1042    sreset(FAL0);
1043 #endif
1044 j_leave:
1045 #ifdef HAVE_MEMORY_DEBUG
1046    n_memcheck();
1047 #endif
1048    NYD_LEAVE;
1049    return exit_status;
1050 }
1051
1052 FL int
1053 c_exit(void *v){/* TODO program state machine */
1054    NYD_ENTER;
1055    UNUSED(v);
1056
1057    if(pstate & PS_STARTED){
1058       if(!(pstate & PS_SOURCING)){
1059 #ifdef n_HAVE_TCAP
1060          if((options & (OPT_INTERACTIVE | OPT_QUICKRUN_MASK)) ==
1061                OPT_INTERACTIVE)
1062             n_termcap_destroy();
1063 #endif
1064          exit(EXIT_OK);
1065       }
1066    }
1067    pstate |= PS_EXIT;
1068    NYD_LEAVE;
1069    return 0;
1070 }
1071
1072 /* Source the others in that case! */
1073 #ifdef HAVE_AMALGAMATION
1074 # include "config.h"
1075 #endif
1076
1077 /* s-it-mode */