diplodocus.org Git - nmh/blob - uip/sendsbr.c

   1
   2 /*
   3  * sendsbr.c -- routines to help WhatNow/Send along
   4  *
   5  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   6  * COPYRIGHT file in the root directory of the nmh distribution for
   7  * complete copyright information.
   8  */
   9
  10 #include <h/mh.h>
  11 #include <h/fmt_scan.h>
  12 #include <h/fmt_compile.h>
  13 #include <h/signals.h>
  14 #include <setjmp.h>
  15 #include <fcntl.h>
  16 #include <h/mime.h>
  17 #include <h/tws.h>
  18 #include <h/utils.h>
  19 #include <h/mts.h>
  20
  21 #ifdef HAVE_SYS_TIME_H
  22 # include <sys/time.h>
  23 #endif
  24 #include <time.h>
  25
  26 #ifdef OAUTH_SUPPORT
  27 #include <h/oauth.h>
  28
  29 static int setup_oauth_params(char *[], int *, const char *, const char **);
  30 #endif /* OAUTH_SUPPORT */
  31
  32 int debugsw = 0;                /* global */
  33 int forwsw  = 1;
  34 int inplace = 1;
  35 int pushsw  = 0;
  36 int splitsw = -1;
  37 int unique  = 0;
  38 int verbsw  = 0;
  39
  40 char *altmsg   = NULL;          /*  .. */
  41 char *annotext = NULL;
  42 char *distfile = NULL;
  43
  44 static jmp_buf env;
  45
  46 /*
  47  * static prototypes
  48  */
  49 static void alert (char *, int);
  50 static int tmp_fd (void);
  51 static void anno (int, struct stat *);
  52 static void annoaux (int);
  53 static int splitmsg (char **, int, char *, char *, struct stat *, int);
  54 static int sendaux (char **, int, char *, char *, struct stat *);
  55 static void handle_sendfrom(char **, int *, char *, const char *);
  56 static int get_from_header_info(const char *, const char **, const char **, const char **);
  57 static const char *get_message_header_info(FILE *, char *);
  58 static void merge_profile_entry(const char *, const char *, char *[], int *);
  59 static void armed_done (int) NORETURN;
  60
  61 /*
  62  * Entry point into (back-end) routines to send message.
  63  */
  64
  65 int
  66 sendsbr (char **vec, int vecp, char *program, char *draft, struct stat *st,
  67          int rename_drft, const char *auth_svc)
  68 {
  69     int status, i;
  70     pid_t child;
  71     char buffer[BUFSIZ], file[BUFSIZ];
  72     struct stat sts;
  73     char **buildvec, *buildprogram;
  74     char *volatile drft = draft;
  75     /* nvecs is volatile to prevent warning from gcc about possible clobbering
  76        by longjmp. */
  77     volatile int nvecs = vecp;
  78     int *nvecsp = (int *) &nvecs;
  79
  80     /*
  81      * Run the mimebuildproc (which is by default mhbuild) on the message
  82      * with the addition of the "-auto" flag
  83      */
  84
  85     switch (child = fork()) {
  86     case NOTOK:
  87         adios("fork", "unable to");
  88         break;
  89
  90     case OK:
  91         buildvec = argsplit(buildmimeproc, &buildprogram, &i);
  92         buildvec[i++] = "-auto";
  93         if (distfile)
  94             buildvec[i++] = "-dist";
  95         buildvec[i++] = (char *) drft;
  96         buildvec[i] = NULL;
  97         execvp(buildprogram, buildvec);
  98         fprintf(stderr, "unable to exec ");
  99         perror(buildmimeproc);
 100         _exit(-1);
 101         break;
 102
 103     default:
 104         if (pidXwait(child, buildmimeproc))
 105             return NOTOK;
 106         break;
 107     }
 108
 109     done=armed_done;
 110     switch (setjmp (env)) {
 111     case OK:
 112         /*
 113          * If given -push and -unique (which is undocumented), then
 114          * rename the draft file.  I'm not quite sure why.
 115          */
 116         if (pushsw && unique) {
 117             char *cp = m_mktemp2(drft, invo_name, NULL, NULL);
 118             if (cp == NULL) {
 119                 adios(NULL, "unable to create temporary file in %s",
 120                       get_temp_dir());
 121             }
 122             if (rename (drft, strncpy(file, cp, sizeof(file))) == NOTOK)
 123                 adios (file, "unable to rename %s to", drft);
 124             drft = file;
 125         }
 126
 127         /*
 128          * Add in any necessary profile entries for xoauth
 129          */
 130
 131         if (auth_svc) {
 132 #ifdef OAUTH_SUPPORT
 133                 const char *errmsg;
 134                 if (setup_oauth_params(vec, nvecsp, auth_svc, &errmsg) != OK) {
 135                         adios(NULL, errmsg);
 136                 }
 137 #else
 138                 adios(NULL, "send built without OAUTH_SUPPORT, "
 139                       "so auth_svc %s is not supported", auth_svc);
 140 #endif /* OAUTH_SUPPORT */
 141         }
 142
 143         /*
 144          * Rework the vec based on From: header in draft, as specified
 145          * by sendfrom-address entries in profile.
 146          */
 147         if (context_find_prefix("sendfrom-")) {
 148             handle_sendfrom(vec, nvecsp, draft, auth_svc);
 149         }
 150
 151         /*
 152          * Check if we need to split the message into
 153          * multiple messages of type "message/partial".
 154          */
 155         if (splitsw >= 0 && !distfile && stat ((char *) drft, &sts) != NOTOK
 156                 && sts.st_size >= CPERMSG) {
 157             status = splitmsg (vec, nvecs, program, drft,
 158                                st, splitsw) ? NOTOK : OK;
 159         } else {
 160             status = sendaux (vec, nvecs, program, drft, st) ? NOTOK : OK;
 161         }
 162
 163         /* rename the original draft */
 164         if (rename_drft && status == OK &&
 165                 rename (drft, strncpy (buffer, m_backup (drft),
 166                                  sizeof(buffer))) == NOTOK)
 167             advise (buffer, "unable to rename %s to", drft);
 168         break;
 169
 170     default:
 171         status = DONE;
 172         break;
 173     }
 174
 175     done=exit;
 176     if (distfile)
 177         (void) m_unlink (distfile);
 178
 179     return status;
 180 }
 181
 182 /*
 183  * Split large message into several messages of
 184  * type "message/partial" and send them.
 185  */
 186
 187 static int
 188 splitmsg (char **vec, int vecp, char *program, char *drft,
 189           struct stat *st, int delay)
 190 {
 191     int compnum, nparts, partno, state, status;
 192     long pos, start;
 193     time_t clock;
 194     char *cp, *dp, buffer[BUFSIZ], msgid[BUFSIZ];
 195     char subject[BUFSIZ];
 196     char name[NAMESZ], partnum[BUFSIZ];
 197     FILE *in;
 198     m_getfld_state_t gstate = 0;
 199
 200     if ((in = fopen (drft, "r")) == NULL)
 201         adios (drft, "unable to open for reading");
 202
 203     cp = dp = NULL;
 204     start = 0L;
 205
 206     /*
 207      * Scan through the message and examine the various header fields,
 208      * as well as locate the beginning of the message body.
 209      */
 210     m_getfld_track_filepos (&gstate, in);
 211     for (compnum = 1;;) {
 212         int bufsz = sizeof buffer;
 213         switch (state = m_getfld (&gstate, name, buffer, &bufsz, in)) {
 214             case FLD:
 215             case FLDPLUS:
 216                 compnum++;
 217
 218                 /*
 219                  * This header field is discarded.
 220                  */
 221                 if (!strcasecmp (name, "Message-ID")) {
 222                     while (state == FLDPLUS) {
 223                         bufsz = sizeof buffer;
 224                         state = m_getfld (&gstate, name, buffer, &bufsz, in);
 225                     }
 226                 } else if (uprf (name, XXX_FIELD_PRF)
 227                         || !strcasecmp (name, VRSN_FIELD)
 228                         || !strcasecmp (name, "Subject")
 229                         || !strcasecmp (name, "Encrypted")) {
 230                     /*
 231                      * These header fields are copied to the enclosed
 232                      * header of the first message in the collection
 233                      * of message/partials.  For the "Subject" header
 234                      * field, we also record it, so that a modified
 235                      * version of it, can be copied to the header
 236                      * of each message/partial in the collection.
 237                      */
 238                     if (!strcasecmp (name, "Subject")) {
 239                         size_t sublen;
 240
 241                         strncpy (subject, buffer, BUFSIZ);
 242                         sublen = strlen (subject);
 243                         if (sublen > 0 && subject[sublen - 1] == '\n')
 244                             subject[sublen - 1] = '\0';
 245                     }
 246
 247                     dp = add (concat (name, ":", buffer, NULL), dp);
 248                     while (state == FLDPLUS) {
 249                         bufsz = sizeof buffer;
 250                         state = m_getfld (&gstate, name, buffer, &bufsz, in);
 251                         dp = add (buffer, dp);
 252                     }
 253                 } else {
 254                     /*
 255                      * These header fields are copied to the header of
 256                      * each message/partial in the collection.
 257                      */
 258                     cp = add (concat (name, ":", buffer, NULL), cp);
 259                     while (state == FLDPLUS) {
 260                         bufsz = sizeof buffer;
 261                         state = m_getfld (&gstate, name, buffer, &bufsz, in);
 262                         cp = add (buffer, cp);
 263                     }
 264                 }
 265
 266                 start = ftell (in) + 1;
 267                 continue;
 268
 269            case BODY:
 270            case FILEEOF:
 271                 break;
 272
 273            case LENERR:
 274            case FMTERR:
 275                 adios (NULL, "message format error in component #%d", compnum);
 276
 277            default:
 278                 adios (NULL, "getfld () returned %d", state);
 279         }
 280
 281         break;
 282     }
 283     m_getfld_state_destroy (&gstate);
 284     if (cp == NULL)
 285         adios (NULL, "headers missing from draft");
 286
 287     nparts = 1;
 288     pos = start;
 289     while (fgets (buffer, sizeof(buffer) - 1, in)) {
 290         long len;
 291
 292         if ((pos += (len = strlen (buffer))) > CPERMSG) {
 293             nparts++;
 294             pos = len;
 295         }
 296     }
 297
 298     /* Only one part, nothing to split */
 299     if (nparts == 1) {
 300         free (cp);
 301         if (dp)
 302             free (dp);
 303
 304         fclose (in);
 305         return sendaux (vec, vecp, program, drft, st);
 306     }
 307
 308     if (!pushsw) {
 309         printf ("Sending as %d Partial Messages\n", nparts);
 310         fflush (stdout);
 311     }
 312     status = OK;
 313
 314     vec[vecp++] = "-partno";
 315     vec[vecp++] = partnum;
 316     if (delay == 0)
 317         vec[vecp++] = "-queued";
 318
 319     time (&clock);
 320     snprintf (msgid, sizeof(msgid), "%s", message_id (clock, 0));
 321
 322     fseek (in, start, SEEK_SET);
 323     for (partno = 1; partno <= nparts; partno++) {
 324         char tmpdrf[BUFSIZ];
 325         FILE *out;
 326
 327         char *cp = m_mktemp2(drft, invo_name, NULL, &out);
 328         if (cp == NULL) {
 329             adios(NULL, "unable to create temporary file in %s",
 330                   get_temp_dir());
 331         }
 332         strncpy(tmpdrf, cp, sizeof(tmpdrf));
 333
 334         /*
 335          * Output the header fields
 336          */
 337         fputs (cp, out);
 338         fprintf (out, "Subject: %s (part %d of %d)\n", subject, partno, nparts);
 339         fprintf (out, "%s: %s\n", VRSN_FIELD, VRSN_VALUE);
 340         fprintf (out, "%s: message/partial; id=\"%s\";\n", TYPE_FIELD, msgid);
 341         fprintf (out, "\tnumber=%d; total=%d\n", partno, nparts);
 342         fprintf (out, "%s: part %d of %d\n\n", DESCR_FIELD, partno, nparts);
 343
 344         /*
 345          * If this is the first in the collection, output the
 346          * header fields we are encapsulating at the beginning
 347          * of the body of the first message.
 348          */
 349         if (partno == 1) {
 350             if (dp)
 351                 fputs (dp, out);
 352             fprintf (out, "Message-ID: %s\n", msgid);
 353             fprintf (out, "\n");
 354         }
 355
 356         pos = 0;
 357         for (;;) {
 358             long len;
 359
 360             if (!fgets (buffer, sizeof(buffer) - 1, in)) {
 361                 if (partno == nparts)
 362                     break;
 363                 adios (NULL, "premature eof");
 364             }
 365
 366             if ((pos += (len = strlen (buffer))) > CPERMSG) {
 367                 fseek (in, -len, SEEK_CUR);
 368                 break;
 369             }
 370
 371             fputs (buffer, out);
 372         }
 373
 374         if (fflush (out))
 375             adios (tmpdrf, "error writing to");
 376
 377         fclose (out);
 378
 379         if (!pushsw && verbsw) {
 380             printf ("\n");
 381             fflush (stdout);
 382         }
 383
 384         /* Pause here, if a delay is specified */
 385         if (delay > 0 && 1 < partno && partno <= nparts) {
 386             if (!pushsw) {
 387                 printf ("pausing %d seconds before sending part %d...\n",
 388                         delay, partno);
 389                 fflush (stdout);
 390             }
 391             sleep ((unsigned int) delay);
 392         }
 393
 394         snprintf (partnum, sizeof(partnum), "%d", partno);
 395         status = sendaux (vec, vecp, program, tmpdrf, st);
 396         (void) m_unlink (tmpdrf);
 397         if (status != OK)
 398             break;
 399
 400         /*
 401          * This is so sendaux will only annotate
 402          * the altmsg the first time it is called.
 403          */
 404         annotext = NULL;
 405     }
 406
 407     free (cp);
 408     if (dp)
 409         free (dp);
 410
 411     fclose (in);        /* close the draft */
 412     return status;
 413 }
 414
 415
 416 /*
 417  * Annotate original message, and
 418  * call `postproc' (which is passed down in "program") to send message.
 419  */
 420
 421 static int
 422 sendaux (char **vec, int vecp, char *program, char *drft, struct stat *st)
 423 {
 424     pid_t child_id;
 425     int i, status, fd, fd2;
 426     char backup[BUFSIZ], buf[BUFSIZ];
 427
 428     fd = pushsw ? tmp_fd () : NOTOK;
 429     fd2 = NOTOK;
 430
 431     if (annotext) {
 432         if ((fd2 = tmp_fd ()) != NOTOK) {
 433             vec[vecp++] = "-idanno";
 434             snprintf (buf, sizeof(buf), "%d", fd2);
 435             vec[vecp++] = buf;
 436         } else {
 437             admonish (NULL, "unable to create temporary file in %s "
 438                       "for annotation list", get_temp_dir());
 439         }
 440     }
 441     vec[vecp++] = drft;
 442     if (distfile && distout (drft, distfile, backup) == NOTOK)
 443         done (1);
 444     vec[vecp] = NULL;
 445
 446     for (i = 0; (child_id = fork()) == NOTOK && i < 5; i++)
 447         sleep (5);
 448
 449     switch (child_id) {
 450     case -1:
 451         /* oops -- fork error */
 452         adios ("fork", "unable to");
 453         break;  /* NOT REACHED */
 454
 455     case 0:
 456         /*
 457          * child process -- send it
 458          *
 459          * If fd is ok, then we are pushing and fd points to temp
 460          * file, so capture anything on stdout and stderr there.
 461          */
 462         if (fd != NOTOK) {
 463             dup2 (fd, fileno (stdout));
 464             dup2 (fd, fileno (stderr));
 465             close (fd);
 466         }
 467         execvp (program, vec);
 468         fprintf (stderr, "unable to exec ");
 469         perror (postproc);
 470         _exit (-1);
 471
 472     default:
 473         /*
 474          * parent process -- wait for it
 475          */
 476         if ((status = pidwait(child_id, NOTOK)) == OK) {
 477             if (annotext && fd2 != NOTOK)
 478                 anno (fd2, st);
 479         } else {
 480             /*
 481              * If postproc failed, and we have good fd (which means
 482              * we pushed), then mail error message (and possibly the
 483              * draft) back to the user.
 484              */
 485             if (fd != NOTOK) {
 486                 alert (drft, fd);
 487                 close (fd);
 488             } else {
 489                 advise (NULL, "message not delivered to anyone");
 490             }
 491             if (annotext && fd2 != NOTOK)
 492                 close (fd2);
 493             if (distfile) {
 494                 (void) m_unlink (drft);
 495                 if (rename (backup, drft) == NOTOK)
 496                     advise (drft, "unable to rename %s to", backup);
 497             }
 498         }
 499         break;
 500     }
 501
 502     return status;
 503 }
 504
 505
 506 /*
 507  * Mail error notification (and possibly a copy of the
 508  * message) back to the user, using the mailproc
 509  */
 510
 511 static void
 512 alert (char *file, int out)
 513 {
 514     pid_t child_id;
 515     int i, in, argp;
 516     char buf[BUFSIZ];
 517     char *program;
 518     char **arglist;
 519
 520     for (i = 0; (child_id = fork()) == NOTOK && i < 5; i++)
 521         sleep (5);
 522
 523     switch (child_id) {
 524         case NOTOK:
 525             /* oops -- fork error */
 526             advise ("fork", "unable to");
 527
 528         case OK:
 529             /* child process -- send it */
 530             SIGNAL (SIGHUP, SIG_IGN);
 531             SIGNAL (SIGINT, SIG_IGN);
 532             SIGNAL (SIGQUIT, SIG_IGN);
 533             SIGNAL (SIGTERM, SIG_IGN);
 534             if (forwsw) {
 535                 if ((in = open (file, O_RDONLY)) == NOTOK) {
 536                     admonish (file, "unable to re-open");
 537                 } else {
 538                     lseek (out, (off_t) 0, SEEK_END);
 539                     strncpy (buf, "\nMessage not delivered to anyone.\n", sizeof(buf));
 540                     if (write (out, buf, strlen (buf)) < 0) {
 541                         advise (file, "write");
 542                     }
 543                     strncpy (buf, "\n------- Unsent Draft\n\n", sizeof(buf));
 544                     if (write (out, buf, strlen (buf)) < 0) {
 545                         advise (file, "write");
 546                     }
 547                     cpydgst (in, out, file, "temporary file");
 548                     close (in);
 549                     strncpy (buf, "\n------- End of Unsent Draft\n", sizeof(buf));
 550                     if (write (out, buf, strlen (buf)) < 0) {
 551                         advise (file, "write");
 552                     }
 553                     if (rename (file, strncpy (buf, m_backup (file), sizeof(buf))) == NOTOK)
 554                         admonish (buf, "unable to rename %s to", file);
 555                 }
 556             }
 557             lseek (out, (off_t) 0, SEEK_SET);
 558             dup2 (out, fileno (stdin));
 559             close (out);
 560             /* create subject for error notification */
 561             snprintf (buf, sizeof(buf), "send failed on %s",
 562                         forwsw ? "enclosed draft" : file);
 563
 564             arglist = argsplit(mailproc, &program, &argp);
 565
 566             arglist[argp++] = getusername();
 567             arglist[argp++] = "-subject";
 568             arglist[argp++] = buf;
 569             arglist[argp] = NULL;
 570
 571             execvp (program, arglist);
 572             fprintf (stderr, "unable to exec ");
 573             perror (mailproc);
 574             _exit (-1);
 575
 576         default:                /* no waiting... */
 577             break;
 578     }
 579 }
 580
 581
 582 static int
 583 tmp_fd (void)
 584 {
 585     int fd;
 586     char *tfile;
 587
 588     if ((tfile = m_mktemp2(NULL, invo_name, &fd, NULL)) == NULL) return NOTOK;
 589
 590     if (debugsw)
 591         advise (NULL, "temporary file %s selected", tfile);
 592     else
 593         if (m_unlink (tfile) == NOTOK)
 594             advise (tfile, "unable to remove");
 595
 596     return fd;
 597 }
 598
 599
 600 static void
 601 anno (int fd, struct stat *st)
 602 {
 603     pid_t child_id;
 604     sigset_t set, oset;
 605     static char *cwd = NULL;
 606     struct stat st2;
 607
 608     if (altmsg &&
 609             (stat (altmsg, &st2) == NOTOK
 610                 || st->st_mtime != st2.st_mtime
 611                 || st->st_dev != st2.st_dev
 612                 || st->st_ino != st2.st_ino)) {
 613         if (debugsw)
 614             admonish (NULL, "$mhaltmsg mismatch");
 615         return;
 616     }
 617
 618     child_id = debugsw ? NOTOK : fork ();
 619     switch (child_id) {
 620         case NOTOK:             /* oops */
 621             if (!debugsw)
 622                 advise (NULL,
 623                             "unable to fork, so doing annotations by hand...");
 624             if (cwd == NULL)
 625                 cwd = getcpy (pwd ());
 626
 627         case OK:
 628             /* block a few signals */
 629             sigemptyset (&set);
 630             sigaddset (&set, SIGHUP);
 631             sigaddset (&set, SIGINT);
 632             sigaddset (&set, SIGQUIT);
 633             sigaddset (&set, SIGTERM);
 634             sigprocmask (SIG_BLOCK, &set, &oset);
 635
 636             unregister_for_removal(0);
 637
 638             annoaux (fd);
 639             if (child_id == OK)
 640                 _exit (0);
 641
 642             /* reset the signal mask */
 643             sigprocmask (SIG_SETMASK, &oset, &set);
 644
 645             if (chdir (cwd) < 0) {
 646                 advise (cwd, "chdir");
 647             }
 648             break;
 649
 650         default:                /* no waiting... */
 651             close (fd);
 652             break;
 653     }
 654 }
 655
 656
 657 static void
 658 annoaux (int fd)
 659 {
 660     int fd2, fd3, msgnum;
 661     char *cp, *folder, *maildir;
 662     char buffer[BUFSIZ], **ap;
 663     FILE *fp;
 664     struct msgs *mp;
 665
 666     if ((folder = getenv ("mhfolder")) == NULL || *folder == 0) {
 667         if (debugsw)
 668             admonish (NULL, "$mhfolder not set");
 669         return;
 670     }
 671     maildir = m_maildir (folder);
 672     if (chdir (maildir) == NOTOK) {
 673         if (debugsw)
 674             admonish (maildir, "unable to change directory to");
 675         return;
 676     }
 677     if (!(mp = folder_read (folder, 0))) {
 678         if (debugsw)
 679             admonish (NULL, "unable to read folder %s", folder);
 680         return;
 681     }
 682
 683     /* check for empty folder */
 684     if (mp->nummsg == 0) {
 685         if (debugsw)
 686             admonish (NULL, "no messages in %s", folder);
 687         goto oops;
 688     }
 689
 690     if ((cp = getenv ("mhmessages")) == NULL || *cp == 0) {
 691         if (debugsw)
 692             admonish (NULL, "$mhmessages not set");
 693         goto oops;
 694     }
 695     if (!debugsw                        /* MOBY HACK... */
 696             && pushsw
 697             && (fd3 = open ("/dev/null", O_RDWR)) != NOTOK
 698             && (fd2 = dup (fileno (stderr))) != NOTOK) {
 699         dup2 (fd3, fileno (stderr));
 700         close (fd3);
 701     }
 702     else
 703         fd2 = NOTOK;
 704     for (ap = brkstring (cp = getcpy (cp), " ", NULL); *ap; ap++)
 705         m_convert (mp, *ap);
 706     free (cp);
 707     if (fd2 != NOTOK)
 708         dup2 (fd2, fileno (stderr));
 709     if (mp->numsel == 0) {
 710         if (debugsw)
 711             admonish (NULL, "no messages to annotate");
 712         goto oops;
 713     }
 714
 715     lseek (fd, (off_t) 0, SEEK_SET);
 716     if ((fp = fdopen (fd, "r")) == NULL) {
 717         if (debugsw)
 718             admonish (NULL, "unable to fdopen annotation list");
 719         goto oops;
 720     }
 721     cp = NULL;
 722     while (fgets (buffer, sizeof(buffer), fp) != NULL)
 723         cp = add (buffer, cp);
 724     fclose (fp);
 725
 726     if (debugsw)
 727         advise (NULL, "annotate%s with %s: \"%s\"",
 728                 inplace ? " inplace" : "", annotext, cp);
 729     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++) {
 730         if (is_selected(mp, msgnum)) {
 731             if (debugsw)
 732                 advise (NULL, "annotate message %d", msgnum);
 733             annotate (m_name (msgnum), annotext, cp, inplace, 1, -2, 0);
 734         }
 735     }
 736
 737     free (cp);
 738
 739 oops:
 740     folder_free (mp);   /* free folder/message structure */
 741 }
 742
 743
 744 static
 745 void
 746 handle_sendfrom(char **vec, int *vecp, char *draft, const char *auth_svc) {
 747     const char *addr, *host;
 748     const char *message;
 749
 750     /* Extract address and host from From: header line in draft. */
 751     if (get_from_header_info(draft, &addr, &host, &message) != OK) {
 752         adios(draft, message);
 753     }
 754
 755     /* Merge in any address or host specific switches to post(1) from profile. */
 756     merge_profile_entry(addr, host, vec, vecp);
 757     free((void *) host);
 758     free((void *) addr);
 759
 760     vec[*vecp] = NULL;
 761
 762     {
 763         char **vp;
 764
 765         for (vp = vec; *vp; ++vp) {
 766             if (strcmp(*vp, "xoauth2") == 0) {
 767 #ifdef OAUTH_SUPPORT
 768                 if (setup_oauth_params(vec, vecp, auth_svc, &message) != OK) {
 769                     adios(NULL, message);
 770                 }
 771                 break;
 772 #else
 773                 NMH_UNUSED(auth_svc);
 774                 adios(NULL, "send built without OAUTH_SUPPORT, "
 775                       "so -saslmech xoauth2 is not supported");
 776 #endif /* OAUTH_SUPPORT */
 777             }
 778         }
 779     }
 780 }
 781
 782
 783 #ifdef OAUTH_SUPPORT
 784 /*
 785  * For XOAUTH2, append profile entries so post can do the heavy lifting
 786  */
 787 static int
 788 setup_oauth_params(char *vec[], int *vecp, const char *auth_svc,
 789                    const char **message) {
 790     const char *saslmech = NULL, *user = NULL;
 791     mh_oauth_service_info svc;
 792     char errbuf[256];
 793     int i;
 794
 795     /* Make sure we have all the information we need. */
 796     for (i = 1; i < *vecp; ++i) {
 797         /* Don't support abbreviated switches, to avoid collisions in the
 798            future if new ones are added. */
 799         if (! strcmp(vec[i-1], "-saslmech")) {
 800             saslmech = vec[i];
 801         } else if (! strcmp(vec[i-1], "-user")) {
 802             user = vec[i];
 803         } else if (! strcmp(vec[i-1], "-authservice")) {
 804             auth_svc = vec[i];
 805         }
 806     }
 807
 808     if (auth_svc == NULL) {
 809         if (saslmech  &&  ! strcasecmp(saslmech, "xoauth2")) {
 810             *message = "must specify -authservice with -saslmech xoauth2";
 811             return NOTOK;
 812         }
 813     } else {
 814         if (user == NULL) {
 815             *message = "must specify -user with -saslmech xoauth2";
 816             return NOTOK;
 817         }
 818
 819         if (saslmech  &&  ! strcasecmp(saslmech, "xoauth2")) {
 820             if (! mh_oauth_get_service_info(auth_svc, &svc, errbuf,
 821                                             sizeof(errbuf)))
 822                 adios(NULL, "Unable to retrieve oauth profile entries: %s",
 823                       errbuf);
 824
 825             vec[(*vecp)++] = getcpy("-authservice");
 826             vec[(*vecp)++] = getcpy(auth_svc);
 827             vec[(*vecp)++] = getcpy("-oauthcredfile");
 828             vec[(*vecp)++] = getcpy(mh_oauth_cred_fn(auth_svc));
 829             vec[(*vecp)++] = getcpy("-oauthclientid");
 830             vec[(*vecp)++] = getcpy(svc.client_id);
 831             vec[(*vecp)++] = getcpy("-oauthclientsecret");
 832             vec[(*vecp)++] = getcpy(svc.client_secret);
 833             vec[(*vecp)++] = getcpy("-oauthauthendpoint");
 834             vec[(*vecp)++] = getcpy(svc.auth_endpoint);
 835             vec[(*vecp)++] = getcpy("-oauthredirect");
 836             vec[(*vecp)++] = getcpy(svc.redirect_uri);
 837             vec[(*vecp)++] = getcpy("-oauthtokenendpoint");
 838             vec[(*vecp)++] = getcpy(svc.token_endpoint);
 839             vec[(*vecp)++] = getcpy("-oauthscope");
 840             vec[(*vecp)++] = getcpy(svc.scope);
 841         }
 842     }
 843
 844     return 0;
 845 }
 846 #endif /* OAUTH_SUPPORT */
 847
 848
 849 /*
 850  * Extract user and domain from From: header line in draft.
 851  */
 852 static
 853 int
 854 get_from_header_info(const char *filename, const char **addr, const char **host, const char **message) {
 855     struct stat st;
 856     FILE *in;
 857
 858     if (stat (filename, &st) == NOTOK) {
 859         *message = "unable to stat draft file";
 860         return NOTOK;
 861     }
 862
 863     if ((in = fopen (filename, "r")) != NULL) {
 864         /* There must be a non-blank Envelope-From or {Resent-}Sender or
 865            {Resent-}From header. */
 866         char *addrformat = "%(addr{Envelope-From})";
 867         char *hostformat = "%(host{Envelope-From})";
 868
 869         if ((*addr = get_message_header_info (in, addrformat)) == NULL  ||
 870             strlen (*addr) == 0) {
 871             addrformat = distfile == NULL  ?  "%(addr{Sender})"  :  "%(addr{Resent-Sender})";
 872             hostformat = distfile == NULL  ?  "%(host{Sender})"  :  "%(host{Resent-Sender})";
 873
 874             if ((*addr = get_message_header_info (in, addrformat)) == NULL) {
 875                 addrformat = distfile == NULL  ?  "%(addr{From})"  :  "%(addr{Resent-From})";
 876                 hostformat = distfile == NULL  ?  "%(host{From})"  :  "%(host{Resent-From})";
 877
 878                 if ((*addr = get_message_header_info (in, addrformat)) == NULL) {
 879                     *message = "unable to find sender address in";
 880                     fclose(in);
 881                     return NOTOK;
 882                 }
 883             }
 884         }
 885
 886         /* Use the hostformat that corresponds to the successful addrformat. */
 887         if ((*host = get_message_header_info(in, hostformat)) == NULL) {
 888             fclose(in);
 889             *message = "unable to find sender host in";
 890             fclose(in);
 891             return NOTOK;
 892         }
 893         fclose(in);
 894
 895         return OK;
 896     } else {
 897         *message = "unable to open";
 898         return NOTOK;
 899     }
 900 }
 901
 902
 903 /*
 904  * Get formatted information from header of a message.
 905  * Adapted from process_single_file() in uip/fmttest.c.
 906  */
 907 static
 908 const char *
 909 get_message_header_info(FILE *in, char *format) {
 910     int dat[5];
 911     struct format *fmt;
 912     struct stat st;
 913     int parsing_header;
 914     m_getfld_state_t gstate = 0;
 915     charstring_t buffer = charstring_create(0);
 916     char *retval;
 917
 918     dat[0] = dat[1] = dat[4] = 0;
 919     dat[2] = fstat(fileno(in), &st) == 0  ?  st.st_size  :  0;
 920     dat[3] = INT_MAX;
 921
 922     (void) fmt_compile(new_fs(NULL, NULL, format), &fmt, 1);
 923     free_fs();
 924
 925     /*
 926      * Read in the message and process the header.
 927      */
 928     rewind (in);
 929     parsing_header = 1;
 930     do {
 931         char name[NAMESZ], rbuf[NMH_BUFSIZ];
 932         int bufsz = sizeof rbuf;
 933         int state = m_getfld(&gstate, name, rbuf, &bufsz, in);
 934
 935         switch (state) {
 936         case FLD:
 937         case FLDPLUS: {
 938             int bucket = fmt_addcomptext(name, rbuf);
 939
 940             if (bucket != -1) {
 941                 while (state == FLDPLUS) {
 942                     bufsz = sizeof rbuf;
 943                     state = m_getfld(&gstate, name, rbuf, &bufsz, in);
 944                     fmt_appendcomp(bucket, name, rbuf);
 945                 }
 946             }
 947
 948             while (state == FLDPLUS) {
 949                 bufsz = sizeof rbuf;
 950                 state = m_getfld(&gstate, name, rbuf, &bufsz, in);
 951             }
 952             break;
 953         }
 954         default:
 955             parsing_header = 0;
 956         }
 957     } while (parsing_header);
 958     m_getfld_state_destroy(&gstate);
 959
 960     fmt_scan(fmt, buffer, INT_MAX, dat, NULL);
 961     fmt_free(fmt, 1);
 962
 963     /* Trim trailing newline, if any. */
 964     retval = rtrim(charstring_buffer_copy((buffer)));
 965     charstring_free(buffer);
 966     if (strlen (retval) > 0) {
 967         return retval;
 968     } else {
 969         free (retval);
 970         return NULL;
 971     }
 972 }
 973
 974
 975 /*
 976  * Look in profile for entry corresponding to addr or host, and add its contents to vec.
 977  *
 978  * Could do some of this automatically, by looking for:
 979  * 1) access-$(mbox{from}) in oauth-svc file using mh_oauth_cred_load(), which isn't
 980  *    static and doesn't have side effects; free the result with mh_oauth_cred_free())
 981  * 2) machine $(mbox{from}) in creds
 982  * If no -server passed in from profile or commandline, could use smtp.<svc>.com for gmail,
 983  * but that might not generalize for other svcs.
 984  */
 985 static
 986 void
 987 merge_profile_entry(const char *addr, const char *host, char *vec[], int *vecp) {
 988     char *addr_entry = concat("sendfrom-", addr, NULL);
 989     char *profile_entry = context_find(addr_entry);
 990
 991     free(addr_entry);
 992     if (profile_entry == NULL) {
 993         /* No entry for the user.  Look for one for the host. */
 994         char *host_entry = concat("sendfrom-", host, NULL);
 995
 996         profile_entry = context_find(host_entry);
 997         free(host_entry);
 998     }
 999
1000     /* Use argsplit() to do the real work of splitting the args in the profile entry. */
1001     if (profile_entry  &&  strlen(profile_entry) > 0) {
1002         int profile_vecp;
1003         char *file;
1004         char **profile_vec = argsplit(profile_entry, &file, &profile_vecp);
1005         int i;
1006
1007         for (i = 0; i < profile_vecp; ++i) {
1008             vec[(*vecp)++] = getcpy(profile_vec[i]);
1009         }
1010
1011         arglist_free(file, profile_vec);
1012     }
1013 }
1014
1015
1016 static void
1017 armed_done (int status)
1018 {
1019     longjmp (env, status ? status : NOTOK);
1020 }