git.marmaro.de Git - mmh/blob - uip/send.c

   1 /*
   2 ** send.c -- send a composed message
   3 **
   4 ** This code is Copyright (c) 2002, by the authors of nmh.  See the
   5 ** COPYRIGHT file in the root directory of the nmh distribution for
   6 ** complete copyright information.
   7 */
   8
   9 #include <h/mh.h>
  10 #include <fcntl.h>
  11 #include <errno.h>
  12 #include <signal.h>
  13 #include <h/signals.h>
  14 #include <setjmp.h>
  15 #include <h/mime.h>
  16 #include <h/tws.h>
  17 #include <h/utils.h>
  18
  19 #ifdef TIME_WITH_SYS_TIME
  20 # include <sys/time.h>
  21 # include <time.h>
  22 #else
  23 # ifdef TM_IN_SYS_TIME
  24 #  include <sys/time.h>
  25 # else
  26 #  include <time.h>
  27 # endif
  28 #endif
  29
  30 int debugsw = 0;  /* global */
  31 int forwsw  = 1;
  32 int inplace = 1;
  33 int pushsw  = 0;
  34 int verbsw  = 0;
  35 char *altmsg   = NULL;
  36 char *annotext = NULL;
  37 char *distfile = NULL;
  38
  39 static jmp_buf env;
  40
  41 /* name of temp file for body content */
  42 static char body_file_name[MAXPATHLEN + 1];
  43 /* name of mhbuild composition temporary file */
  44 static char composition_file_name[MAXPATHLEN + 1];
  45 static int field_size;  /* size of header field buffer */
  46 static char *field;  /* header field buffer */
  47 static FILE *draft_file;  /* draft file pointer */
  48 static FILE *body_file;  /* body file pointer */
  49 static FILE *composition_file;  /* composition file pointer */
  50
  51 /*
  52 ** static prototypes
  53 */
  54 static int sendsbr(char **, int, char *, struct stat *, int);
  55 static void armed_done(int) NORETURN;
  56 static void alert(char *, int);
  57 static int tmp_fd(void);
  58 static void anno(int, struct stat *);
  59 static void annoaux(int);
  60 static int sendaux(char **, int, char *, struct stat *);
  61 static int attach(char *);
  62 static void clean_up_temporary_files(void);
  63 static int get_line(void);
  64 static void make_mime_composition_file_entry(char *);
  65
  66
  67 static struct swit switches[] = {
  68 #define ALIASW  0
  69         { "alias aliasfile", 0 },
  70 #define DEBUGSW  1
  71         { "debug", -5 },
  72 #define FILTSW  2
  73         { "filter filterfile", 0 },
  74 #define NFILTSW  3
  75         { "nofilter", 0 },
  76 #define FRMTSW  4
  77         { "format", 0 },
  78 #define NFRMTSW  5
  79         { "noformat", 0 },
  80 #define FORWSW  6
  81         { "forward", 0 },
  82 #define NFORWSW  7
  83         { "noforward", 0 },
  84 #define PUSHSW  8
  85         { "push", 0 },
  86 #define NPUSHSW  9
  87         { "nopush", 0 },
  88 #define VERBSW  10
  89         { "verbose", 0 },
  90 #define NVERBSW  11
  91         { "noverbose", 0 },
  92 #define WATCSW  12
  93         { "watch", 0 },
  94 #define NWATCSW  13
  95         { "nowatch", 0 },
  96 #define VERSIONSW  14
  97         { "version", 0 },
  98 #define HELPSW  15
  99         { "help", 0 },
 100         { NULL, 0 }
 101 };
 102
 103
 104 int
 105 main(int argc, char **argv)
 106 {
 107         int msgp = 0, nfiles = 0, distsw = 0, vecp = 1;
 108         int msgnum, status;
 109         int in, out;
 110         char *cp, *maildir = NULL;
 111         char buf[BUFSIZ], **ap, **argp, **arguments;
 112         char *msgs[MAXARGS], *vec[MAXARGS];
 113         char *files[MAXARGS];
 114         struct msgs *mp;
 115         struct stat st;
 116         struct stat st2;
 117
 118
 119 #ifdef LOCALE
 120         setlocale(LC_ALL, "");
 121 #endif
 122         invo_name = mhbasename(argv[0]);
 123
 124         /* read user profile/context */
 125         context_read();
 126
 127         arguments = getarguments(invo_name, argc, argv, 1);
 128         argp = arguments;
 129
 130         vec[vecp++] = "-library";
 131         vec[vecp++] = getcpy(toabsdir("+"));
 132
 133         while ((cp = *argp++)) {
 134                 if (*cp == '-') {
 135                         switch (smatch(++cp, switches)) {
 136                         case AMBIGSW:
 137                                 ambigsw(cp, switches);
 138                                 done(1);
 139                         case UNKWNSW:
 140                                 adios(NULL, "-%s unknown\n", cp);
 141
 142                         case HELPSW:
 143                                 snprintf(buf, sizeof(buf),
 144                                                 "%s [file] [switches]",
 145                                                 invo_name);
 146                                 print_help(buf, switches, 1);
 147                                 done(1);
 148                         case VERSIONSW:
 149                                 print_version(invo_name);
 150                                 done(1);
 151
 152                         case PUSHSW:
 153                                 pushsw++;
 154                                 continue;
 155                         case NPUSHSW:
 156                                 pushsw = 0;
 157                                 continue;
 158
 159                         case FORWSW:
 160                                 forwsw++;
 161                                 continue;
 162                         case NFORWSW:
 163                                 forwsw = 0;
 164                                 continue;
 165
 166                         case VERBSW:
 167                                 verbsw++;
 168                                 vec[vecp++] = --cp;
 169                                 continue;
 170                         case NVERBSW:
 171                                 verbsw = 0;
 172                                 vec[vecp++] = --cp;
 173                                 continue;
 174
 175                         case DEBUGSW:
 176                                 debugsw++;  /* fall */
 177                         case NFILTSW:
 178                         case FRMTSW:
 179                         case NFRMTSW:
 180                         case WATCSW:
 181                         case NWATCSW:
 182                                 vec[vecp++] = --cp;
 183                                 continue;
 184
 185                         case ALIASW:
 186                         case FILTSW:
 187                                 vec[vecp++] = --cp;
 188                                 if (!(cp = *argp++) || *cp == '-') {
 189                                         adios(NULL, "missing argument to %s",
 190                                                         argp[-2]);
 191                                 }
 192                                 vec[vecp++] = cp;
 193                                 continue;
 194
 195                         }
 196                 } else {
 197                         if (*cp == '/') {
 198                                 files[nfiles++] = cp;
 199                         } else {
 200                                 msgs[msgp++] = cp;
 201                         }
 202                 }
 203         }
 204
 205         /* check for "Aliasfile:" profile entry */
 206         if ((cp = context_find("Aliasfile"))) {
 207                 char *dp = NULL;
 208
 209                 for (ap=brkstring(dp=getcpy(cp), " ", "\n"); ap && *ap; ap++) {
 210                         vec[vecp++] = "-alias";
 211                         vec[vecp++] = getcpy(etcpath(*ap));
 212                 }
 213         }
 214
 215         if (!msgp && !nfiles) {
 216                 msgs[msgp++] = seq_cur;
 217         }
 218         maildir = toabsdir(draftfolder);
 219
 220         if (chdir(maildir) == NOTOK) {
 221                 adios(maildir, "unable to change directory to");
 222         }
 223
 224         if (!(mp = folder_read(draftfolder))) {
 225                 adios(NULL, "unable to read draft folder %s", draftfolder);
 226         }
 227         if (mp->nummsg == 0) {
 228                 adios(NULL, "no messages in draft folder %s", draftfolder);
 229         }
 230         /* parse all the message ranges/sequences and set SELECTED */
 231         for (msgnum = 0; msgnum < msgp; msgnum++) {
 232                 if (!m_convert(mp, msgs[msgnum])) {
 233                         done(1);
 234                 }
 235         }
 236         seq_setprev(mp);
 237
 238         for (msgp = 0, msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++) {
 239                 if (is_selected(mp, msgnum)) {
 240                         files[nfiles++] = getcpy(m_name(msgnum));
 241                         unset_exists(mp, msgnum);
 242                 }
 243         }
 244
 245         mp->msgflags |= SEQMOD;
 246         seq_save(mp);
 247
 248         if (!(cp = getenv("SIGNATURE")) || !*cp) {
 249                 if ((cp = context_find("signature")) && *cp) {
 250                         m_putenv("SIGNATURE", cp);
 251                 }
 252         }
 253
 254         for (msgnum = 0; msgnum < nfiles; msgnum++) {
 255                 if (stat(files[msgnum], &st) == NOTOK) {
 256                         adios(files[msgnum], "unable to stat draft file");
 257                 }
 258         }
 259
 260         if (!(annotext = getenv("mhannotate")) || !*annotext) {
 261                 annotext = NULL;
 262         }
 263         if (annotext && ((cp = getenv("mhinplace")) && *cp)) {
 264                 inplace = atoi(cp);
 265         }
 266         if (!(altmsg = getenv("mhaltmsg")) || !*altmsg) {
 267                 altmsg = NULL;  /* used by dist interface - see below */
 268         }
 269
 270         if ((cp = getenv("mhdist")) && *cp && (distsw = atoi(cp)) && altmsg) {
 271                 vec[vecp++] = "-dist";
 272                 distfile = getcpy(m_mktemp2(altmsg, invo_name, NULL, NULL));
 273                 if (link(altmsg, distfile) == NOTOK) {
 274                         if (errno != EXDEV) {
 275                                 adios(distfile, "unable to link %s to",
 276                                                 altmsg);
 277                         }
 278                         free(distfile);
 279                         distfile = getcpy(m_mktemp2(NULL, invo_name,
 280                                         NULL, NULL));
 281                         if ((in = open(altmsg, O_RDONLY)) == NOTOK) {
 282                                 adios(altmsg, "unable to open");
 283                         }
 284                         fstat(in, &st2);
 285                         if ((out = creat(distfile, (int)st2.st_mode & 0777)) ==
 286                                         NOTOK) {
 287                                 adios(distfile, "unable to write");
 288                         }
 289                         cpydata(in, out, altmsg, distfile);
 290                         close(in);
 291                         close(out);
 292                 }
 293         } else {
 294                 distfile = NULL;
 295         }
 296
 297         if (!altmsg || stat(altmsg, &st) == NOTOK) {
 298                 st.st_mtime = 0;
 299                 st.st_dev = 0;
 300                 st.st_ino = 0;
 301         }
 302         if (pushsw) {
 303                 push();
 304         }
 305         status = 0;
 306         vec[0] = mhbasename(postproc);
 307         closefds(3);
 308
 309         for (msgnum = 0; msgnum < nfiles; msgnum++) {
 310                 switch (sendsbr(vec, vecp, files[msgnum], &st, 1)) {
 311                 case DONE:
 312                         done(++status);
 313                 case NOTOK:
 314                         status++;  /* fall */
 315                 case OK:
 316                         break;
 317                 }
 318         }
 319
 320         context_save();
 321         done(status);
 322         return 1;
 323 }
 324
 325
 326 /*
 327 ** message sending back-end
 328 */
 329 static int
 330 sendsbr(char **vec, int vecp, char *drft, struct stat *st, int rename_drft)
 331 {
 332         int status;
 333         char buffer[BUFSIZ];
 334         char *original_draft;
 335         char *p;  /* string pointer for building file name */
 336
 337         /*
 338         ** Save the original name of the draft file.  The name of the
 339         ** draft file is changed to a temporary file containing the built
 340         ** MIME message if there are attachments.  We need the original
 341         ** name so that it can be renamed after the message is sent.
 342         */
 343         original_draft = drft;
 344
 345         /*
 346         ** Convert the draft to a MIME message.
 347         ** Use the mhbuild composition file for the draft if there was
 348         ** a successful conversion because that now contains the MIME
 349         ** message.  A nice side effect of this is that it leaves the
 350         ** original draft file untouched so that it can be retrieved
 351         ** and modified if desired.
 352         */
 353         switch (attach(drft)) {
 354         case OK:
 355                 drft = composition_file_name;
 356                 break;
 357
 358         case NOTOK:
 359                 return (NOTOK);
 360
 361         case DONE:
 362                 break;
 363         }
 364
 365         done=armed_done;
 366         switch (setjmp(env)) {
 367         case OK:
 368                 status = sendaux(vec, vecp, drft, st) ? NOTOK : OK;
 369                 /* rename the original draft */
 370                 if (rename_drft && status == OK &&
 371                                 rename(original_draft, strncpy(buffer,
 372                                 m_backup(original_draft), sizeof(buffer)))
 373                                 == NOTOK) {
 374                         advise(buffer, "unable to rename %s to", drft);
 375                 }
 376                 break;
 377
 378         default:
 379                 status = DONE;
 380                 break;
 381         }
 382
 383         done=exit;
 384         if (distfile) {
 385                 unlink(distfile);
 386         }
 387
 388         /*
 389         ** Get rid of any temporary files that we created for attachments.
 390         ** Also get rid of the renamed composition file that mhbuild
 391         ** leaves as a turd.  It looks confusing, but we use the body
 392         ** file name to help build the renamed composition file name.
 393         */
 394         if (drft == composition_file_name) {
 395                 clean_up_temporary_files();
 396
 397                 if (strlen(composition_file_name) >=
 398                                 sizeof (composition_file_name) - 6) {
 399                         advise(NULL, "unable to remove original composition file.");
 400                 } else {
 401                         if (!(p = strrchr(composition_file_name, '/'))) {
 402                                 p = composition_file_name;
 403                         } else {
 404                                 p++;
 405                         }
 406                         strcpy(body_file_name, p);
 407                         *p++ = ',';
 408                         strcpy(p, body_file_name);
 409                         strcat(p, ".orig");
 410
 411                         unlink(composition_file_name);
 412                 }
 413         }
 414
 415         return status;
 416 }
 417
 418 static int
 419 attach(char *draft_file_name)
 420 {
 421         char buf[MAXPATHLEN + 6];
 422         int c;
 423         int has_attachment;
 424         int has_body;
 425         int non_ascii; /* msg body contains non-ASCII chars */
 426         int length;  /* length of attachment header field name */
 427         char *p;
 428
 429         if (!(draft_file = fopen(draft_file_name, "r"))) {
 430                 adios(NULL, "can't open draft file `%s'.", draft_file_name);
 431         }
 432
 433         /* We'll grow the buffer as needed. */
 434         field = (char *)mh_xmalloc(field_size = 256);
 435
 436         /*
 437         ** Scan the draft file for an attachment header field name.
 438         */
 439         length = strlen(attach_hdr);
 440         has_attachment = 0;
 441         while (get_line() != EOF && *field != '\0' && *field != '-') {
 442                 if (strncasecmp(field, attach_hdr, length)==0 &&
 443                                 field[length] == ':') {
 444                         has_attachment = 1;
 445                 }
 446         }
 447
 448         /*
 449         ** Look for at least one non-blank line in the body of the
 450         ** message which indicates content in the body.
 451         ** Check if body contains at least one non-blank (= not empty)
 452         ** and if it contains any non-ASCII chars (= need MIME).
 453         */
 454         has_body = 0;
 455         non_ascii = 0;
 456         while (get_line() != EOF) {
 457                 for (p = field; *p != '\0'; p++) {
 458                         if (*p != ' ' && *p != '\t') {
 459                                 has_body = 1;
 460                         }
 461                         if (*p > 127 || *p < 0) {
 462                                 non_ascii = 1;
 463                         }
 464                 }
 465                 if (has_body && non_ascii) {
 466                         break;  /* that's been already enough information +/
 467                 }
 468         }
 469
 470         if (!has_attachment && non_ascii==0) {
 471                 /* We don't need to convert it to MIME. */
 472                 return DONE;
 473         }
 474
 475         /*
 476         ** Else: mimify
 477         */
 478
 479         /* Make names for the temporary files.  */
 480         strncpy(body_file_name,
 481                         m_mktemp(toabsdir(invo_name), NULL, NULL),
 482                         sizeof (body_file_name));
 483         strncpy(composition_file_name,
 484                         m_mktemp(toabsdir(invo_name), NULL, NULL),
 485                         sizeof (composition_file_name));
 486
 487         if (has_body) {
 488                 body_file = fopen(body_file_name, "w");
 489         }
 490         composition_file = fopen(composition_file_name, "w");
 491
 492         if ((has_body && !body_file) || !composition_file) {
 493                 clean_up_temporary_files();
 494                 adios(NULL, "unable to open all of the temporary files.");
 495         }
 496
 497         /* Copy non-attachment header fields to the temp composition file. */
 498         rewind(draft_file);
 499         while (get_line() != EOF && *field && *field != '-') {
 500                 if (strncasecmp(field, attach_hdr, length) != 0 ||
 501                                 field[length] != ':') {
 502                         fprintf(composition_file, "%s\n", field);
 503                 }
 504         }
 505         fputs("--------\n", composition_file);
 506
 507         if (has_body) {
 508                 /* Copy the message body to the temporary file. */
 509                 while ((c = getc(draft_file)) != EOF) {
 510                         putc(c, body_file);
 511                 }
 512                 fclose(body_file);
 513
 514                 /* Add a mhbuild MIME composition file line for the body */
 515                 /* charset will be discovered/guessed by buildmimeproc */
 516                 fprintf(composition_file, "#text/plain %s\n", body_file_name);
 517         }
 518
 519         /*
 520         ** Now, go back to the beginning of the draft file and look for
 521         ** header fields that specify attachments.  Add a mhbuild MIME
 522         ** composition file for each.
 523         */
 524         rewind(draft_file);
 525         while (get_line() != EOF && *field && *field != '-') {
 526                 if (strncasecmp(field, attach_hdr, length) == 0 &&
 527                                 field[length] == ':') {
 528                         for (p = field+length+1; *p==' ' || *p=='\t'; p++) {
 529                                 continue;
 530                         }
 531                         if (*p == '+') {
 532                                 /* forwarded message */
 533                                 fprintf(composition_file, "#forw [forwarded message(s)] %s\n", p);
 534                         } else {
 535                                 /* regular attachment */
 536                                 make_mime_composition_file_entry(p);
 537                         }
 538                 }
 539         }
 540         fclose(composition_file);
 541
 542         /*
 543         ** We're ready to roll!  Run mhbuild on the composition file.
 544         ** Note that mhbuild is in the context as buildmimeproc.
 545         */
 546         sprintf(buf, "%s %s", buildmimeproc, composition_file_name);
 547
 548         if (system(buf) != 0) {
 549                 /* some problem */
 550                 clean_up_temporary_files();
 551                 return (NOTOK);
 552         }
 553
 554         return (OK);
 555 }
 556
 557 static void
 558 clean_up_temporary_files(void)
 559 {
 560         unlink(body_file_name);
 561         unlink(composition_file_name);
 562
 563         return;
 564 }
 565
 566 static int
 567 get_line(void)
 568 {
 569         int c;  /* current character */
 570         int n;  /* number of bytes in buffer */
 571         char *p;
 572
 573         /*
 574         ** Get a line from the input file, growing the field buffer as
 575         ** needed.  We do this so that we can fit an entire line in the
 576         ** buffer making it easy to do a string comparison on both the
 577         ** field name and the field body which might be a long path name.
 578         */
 579         for (n = 0, p = field; (c = getc(draft_file)) != EOF; *p++ = c) {
 580                 if (c == '\n' && (c = getc(draft_file)) != ' ' && c != '\t') {
 581                         ungetc(c, draft_file);
 582                         c = '\n';
 583                         break;
 584                 }
 585                 if (++n >= field_size - 1) {
 586                         field = (char *)mh_xrealloc(field, field_size += 256);
 587                         p = field + n - 1;
 588                 }
 589         }
 590         *p = '\0';
 591
 592         return (c);
 593 }
 594
 595 static void
 596 make_mime_composition_file_entry(char *file_name)
 597 {
 598         FILE *fp;
 599         struct node *np;
 600         char *cp;
 601         char content_type[BUFSIZ];
 602         char cmdbuf[BUFSIZ];
 603         char *cmd = mimetypequeryproc;
 604
 605         for (np = m_defs; np; np = np->n_next) {
 606                 if (strcasecmp(np->n_name, mimetypequery)==0) {
 607                         cmd = np->n_field;
 608                         break;
 609                 }
 610         }
 611         snprintf(cmdbuf, sizeof cmdbuf, "%s %s", cmd, file_name);
 612
 613         if (!(fp = popen(cmdbuf, "r"))) {
 614                 clean_up_temporary_files();
 615                 adios(NULL, "unable to determine content type with `%s'",
 616                                 cmdbuf);
 617         }
 618         if (fgets(content_type, sizeof content_type, fp) &&
 619                         (cp = strrchr(content_type, '\n'))) {
 620                 *cp = '\0';
 621         } else {
 622                 strcpy(content_type, "application/octet-stream");
 623                 admonish(NULL, "problems with `%s', using fall back type `%s'",
 624                                 cmdbuf, content_type);
 625         }
 626         pclose(fp);
 627
 628         /* TODO: don't use access(2) because it checks for ruid, not euid */
 629         if (access(file_name, R_OK) != 0) {
 630                 clean_up_temporary_files();
 631                 adios(NULL, "unable to access file `%s'", file_name);
 632         }
 633
 634         fprintf(composition_file, "#%s; name=\"%s\" <>{attachment}",
 635                 content_type,
 636                 (!(cp = strrchr(file_name, '/'))) ? file_name : cp + 1);
 637
 638         fprintf(composition_file, " %s\n", file_name);
 639
 640         return;
 641 }
 642
 643 /*
 644 ** The back-end of the message sending back-end.
 645 ** Annotate original message, and call `postproc' to send message.
 646 */
 647 static int
 648 sendaux(char **vec, int vecp, char *drft, struct stat *st)
 649 {
 650         pid_t child_id;
 651         int i, status, fd, fd2;
 652         char backup[BUFSIZ];
 653
 654         fd = pushsw ? tmp_fd() : NOTOK;
 655         fd2 = NOTOK;
 656
 657         vec[vecp++] = drft;
 658         if (annotext && (fd2 = tmp_fd()) == NOTOK) {
 659                 admonish(NULL, "unable to create file for annotation list");
 660         }
 661         if (distfile && distout(drft, distfile, backup) == NOTOK) {
 662                 done(1);
 663         }
 664         vec[vecp] = NULL;
 665
 666         for (i = 0; (child_id = fork()) == NOTOK && i < 5; i++) {
 667                 sleep(5);
 668         }
 669
 670         switch (child_id) {
 671         case -1:
 672                 /* oops -- fork error */
 673                 adios("fork", "unable to");
 674                 break;  /* NOT REACHED */
 675
 676         case 0:
 677                 /*
 678                 ** child process -- send it
 679                 **
 680                 ** If fd is ok, then we are pushing and fd points to temp
 681                 ** file, so capture anything on stdout and stderr there.
 682                 */
 683                 if (fd != NOTOK) {
 684                         dup2(fd, fileno(stdout));
 685                         dup2(fd, fileno(stderr));
 686                         close(fd);
 687                 }
 688                 execvp(postproc, vec);
 689                 fprintf(stderr, "unable to exec ");
 690                 perror(postproc);
 691                 _exit(-1);
 692                 break;  /* NOT REACHED */
 693
 694         default:
 695                 /* parent process -- wait for it */
 696                 if ((status = pidwait(child_id, NOTOK)) == OK) {
 697                         if (annotext && fd2 != NOTOK)
 698                                 anno(fd2, st);
 699                 } else {
 700                         /*
 701                         ** If postproc failed, and we have good fd (which
 702                         ** means we pushed), then mail error message
 703                         ** (and possibly the draft) back to the user.
 704                         */
 705                         if (fd != NOTOK) {
 706                                 alert(drft, fd);
 707                                 close(fd);
 708                         } else {
 709                                 advise(NULL, "message not delivered to anyone");
 710                         }
 711                         if (annotext && fd2 != NOTOK) {
 712                                 close(fd2);
 713                         }
 714                         if (distfile) {
 715                                 unlink(drft);
 716                                 if (rename(backup, drft) == NOTOK) {
 717                                         advise(drft, "unable to rename %s to",
 718                                                         backup);
 719                                 }
 720                         }
 721                 }
 722                 break;
 723         }
 724
 725         return status;
 726 }
 727
 728
 729 /*
 730 ** Mail error notification (and possibly a copy of the
 731 ** message) back to the user, using the mailproc
 732 */
 733 static void
 734 alert(char *file, int out)
 735 {
 736         pid_t child_id;
 737         int i, in;
 738         char buf[BUFSIZ];
 739
 740         for (i = 0; (child_id = fork()) == NOTOK && i < 5; i++) {
 741                 sleep(5);
 742         }
 743
 744         switch (child_id) {
 745         case NOTOK:
 746                 /* oops -- fork error */
 747                 advise("fork", "unable to");
 748
 749         case OK:
 750                 /* child process -- send it */
 751                 SIGNAL(SIGHUP, SIG_IGN);
 752                 SIGNAL(SIGINT, SIG_IGN);
 753                 SIGNAL(SIGQUIT, SIG_IGN);
 754                 SIGNAL(SIGTERM, SIG_IGN);
 755                 if (forwsw) {
 756                         if ((in = open(file, O_RDONLY)) == NOTOK) {
 757                                 admonish(file, "unable to re-open");
 758                         } else {
 759                                 lseek(out, (off_t) 0, SEEK_END);
 760                                 strncpy(buf, "\nMessage not delivered to anyone.\n", sizeof(buf));
 761                                 write(out, buf, strlen(buf));
 762                                 strncpy(buf, "\n------- Unsent Draft\n\n", sizeof(buf));
 763                                 write(out, buf, strlen(buf));
 764                                 cpydgst(in, out, file, "temporary file");
 765                                 close(in);
 766                                 strncpy(buf, "\n------- End of Unsent Draft\n", sizeof(buf));
 767                                 write(out, buf, strlen(buf));
 768                                 if (rename(file, strncpy(buf, m_backup(file), sizeof(buf))) == NOTOK) {
 769                                         admonish(buf, "unable to rename %s to", file);
 770                                 }
 771                         }
 772                 }
 773                 lseek(out, (off_t) 0, SEEK_SET);
 774                 dup2(out, fileno(stdin));
 775                 close(out);
 776                 /* create subject for error notification */
 777                 snprintf(buf, sizeof(buf), "send failed on %s",
 778                                 forwsw ? "enclosed draft" : file);
 779
 780                 execlp(mailproc, mhbasename(mailproc), getusername(),
 781                                 "-subject", buf, NULL);
 782                 fprintf(stderr, "unable to exec ");
 783                 perror(mailproc);
 784                 _exit(-1);
 785
 786         default:  /* no waiting... */
 787                 break;
 788         }
 789 }
 790
 791
 792 static int
 793 tmp_fd(void)
 794 {
 795         int fd;
 796         char *tfile = NULL;
 797
 798         tfile = m_mktemp2(NULL, invo_name, &fd, NULL);
 799         if (tfile == NULL) return NOTOK;
 800         fchmod(fd, 0600);
 801
 802         if (debugsw) {
 803                 advise(NULL, "temporary file %s selected", tfile);
 804         } else {
 805                 if (unlink(tfile) == NOTOK) {
 806                         advise(tfile, "unable to remove");
 807                 }
 808         }
 809
 810         return fd;
 811 }
 812
 813
 814 static void
 815 anno(int fd, struct stat *st)
 816 {
 817         pid_t child_id;
 818         sigset_t set, oset;
 819         static char *cwd = NULL;
 820         struct stat st2;
 821
 822         if (altmsg && (stat(altmsg, &st2) == NOTOK ||
 823                         st->st_mtime != st2.st_mtime ||
 824                         st->st_dev != st2.st_dev ||
 825                         st->st_ino != st2.st_ino)) {
 826                 if (debugsw) {
 827                         admonish(NULL, "$mhaltmsg mismatch");
 828                 }
 829                 return;
 830         }
 831
 832         child_id = debugsw ? NOTOK : fork();
 833         switch (child_id) {
 834         case NOTOK:  /* oops */
 835                 if (!debugsw) {
 836                         advise(NULL, "unable to fork, so doing annotations by hand...");
 837                 }
 838                 if (!cwd) {
 839                         cwd = getcpy(pwd());
 840                 }
 841                 /* fall */
 842
 843         case OK:
 844                 /* block a few signals */
 845                 sigemptyset(&set);
 846                 sigaddset(&set, SIGHUP);
 847                 sigaddset(&set, SIGINT);
 848                 sigaddset(&set, SIGQUIT);
 849                 sigaddset(&set, SIGTERM);
 850                 SIGPROCMASK(SIG_BLOCK, &set, &oset);
 851
 852                 annoaux(fd);
 853                 if (child_id == OK) {
 854                         _exit(0);
 855                 }
 856
 857                 /* reset the signal mask */
 858                 SIGPROCMASK(SIG_SETMASK, &oset, &set);
 859
 860                 chdir(cwd);
 861                 break;
 862
 863         default:  /* no waiting... */
 864                 close(fd);
 865                 break;
 866         }
 867 }
 868
 869
 870 static void
 871 annoaux(int fd)
 872 {
 873         int fd2, fd3, msgnum;
 874         char *cp, *folder, *maildir;
 875         char buffer[BUFSIZ], **ap;
 876         FILE *fp;
 877         struct msgs *mp;
 878
 879         if (!(folder = getenv("mhfolder")) || !*folder) {
 880                 if (debugsw) {
 881                         admonish(NULL, "$mhfolder not set");
 882                 }
 883                 return;
 884         }
 885         maildir = toabsdir(folder);
 886         if (chdir(maildir) == NOTOK) {
 887                 if (debugsw) {
 888                         admonish(maildir, "unable to change directory to");
 889                 }
 890                 return;
 891         }
 892         if (!(mp = folder_read(folder))) {
 893                 if (debugsw) {
 894                         admonish(NULL, "unable to read folder %s", folder);
 895                 }
 896                 return;
 897         }
 898
 899         if (mp->nummsg == 0) {
 900                 if (debugsw) {
 901                         admonish(NULL, "no messages in %s", folder);
 902                 }
 903                 goto oops;
 904         }
 905         if ((cp = getenv("mhmessages")) == NULL || *cp == 0) {
 906                 if (debugsw) {
 907                         admonish(NULL, "$mhmessages not set");
 908                 }
 909                 goto oops;
 910         }
 911         if (!debugsw  /* MOBY HACK... */
 912                         && pushsw
 913                         && (fd3 = open("/dev/null", O_RDWR)) != NOTOK
 914                         && (fd2 = dup(fileno(stderr))) != NOTOK) {
 915                 dup2(fd3, fileno(stderr));
 916                 close(fd3);
 917         } else {
 918                 fd2 = NOTOK;
 919         }
 920         for (ap = brkstring(cp = getcpy(cp), " ", NULL); *ap; ap++) {
 921                 m_convert(mp, *ap);
 922         }
 923         free(cp);
 924         if (fd2 != NOTOK) {
 925                 dup2(fd2, fileno(stderr));
 926         }
 927         if (mp->numsel == 0) {
 928                 if (debugsw) {
 929                         admonish(NULL, "no messages to annotate");
 930                 }
 931                 goto oops;
 932         }
 933
 934         lseek(fd, (off_t) 0, SEEK_SET);
 935         if ((fp = fdopen(fd, "r")) == NULL) {
 936                 if (debugsw) {
 937                         admonish(NULL, "unable to fdopen annotation list");
 938                 }
 939                 goto oops;
 940         }
 941         cp = NULL;
 942         while (fgets(buffer, sizeof(buffer), fp) != NULL) {
 943                 cp = add(buffer, cp);
 944         }
 945         fclose(fp);
 946
 947         if (debugsw) {
 948                 advise(NULL, "annotate%s with %s: \"%s\"",
 949                                 inplace ? " inplace" : "", annotext, cp);
 950         }
 951         for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++) {
 952                 if (is_selected(mp, msgnum)) {
 953                         if (debugsw) {
 954                                 advise(NULL, "annotate message %d", msgnum);
 955                         }
 956                         annotate(m_name(msgnum), annotext, cp, inplace,
 957                                         1, -2, 0);
 958                 }
 959         }
 960         free(cp);
 961
 962 oops:
 963         folder_free(mp);
 964 }
 965
 966
 967 static void
 968 armed_done(int status)
 969 {
 970         longjmp(env, status ? status : NOTOK);
 971
 972         exit(status);
 973 }