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, 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         mh_xfree(dp);
 302
 303         fclose (in);
 304         return sendaux (vec, vecp, program, drft, st);
 305     }
 306
 307     if (!pushsw) {
 308         printf ("Sending as %d Partial Messages\n", nparts);
 309         fflush (stdout);
 310     }
 311     status = OK;
 312
 313     vec[vecp++] = "-partno";
 314     vec[vecp++] = partnum;
 315     if (delay == 0)
 316         vec[vecp++] = "-queued";
 317
 318     time (&clock);
 319     snprintf (msgid, sizeof(msgid), "%s", message_id (clock, 0));
 320
 321     fseek (in, start, SEEK_SET);
 322     for (partno = 1; partno <= nparts; partno++) {
 323         char tmpdrf[BUFSIZ];
 324         FILE *out;
 325
 326         char *cp = m_mktemp2(drft, invo_name, NULL, &out);
 327         if (cp == NULL) {
 328             adios(NULL, "unable to create temporary file in %s",
 329                   get_temp_dir());
 330         }
 331         strncpy(tmpdrf, cp, sizeof(tmpdrf));
 332
 333         /*
 334          * Output the header fields
 335          */
 336         fputs (cp, out);
 337         fprintf (out, "Subject: %s (part %d of %d)\n", subject, partno, nparts);
 338         fprintf (out, "%s: %s\n", VRSN_FIELD, VRSN_VALUE);
 339         fprintf (out, "%s: message/partial; id=\"%s\";\n", TYPE_FIELD, msgid);
 340         fprintf (out, "\tnumber=%d; total=%d\n", partno, nparts);
 341         fprintf (out, "%s: part %d of %d\n\n", DESCR_FIELD, partno, nparts);
 342
 343         /*
 344          * If this is the first in the collection, output the
 345          * header fields we are encapsulating at the beginning
 346          * of the body of the first message.
 347          */
 348         if (partno == 1) {
 349             if (dp)
 350                 fputs (dp, out);
 351             fprintf (out, "Message-ID: %s\n", msgid);
 352             fprintf (out, "\n");
 353         }
 354
 355         pos = 0;
 356         for (;;) {
 357             long len;
 358
 359             if (!fgets (buffer, sizeof buffer, in)) {
 360                 if (partno == nparts)
 361                     break;
 362                 adios (NULL, "premature eof");
 363             }
 364
 365             if ((pos += (len = strlen (buffer))) > CPERMSG) {
 366                 fseek (in, -len, SEEK_CUR);
 367                 break;
 368             }
 369
 370             fputs (buffer, out);
 371         }
 372
 373         if (fflush (out))
 374             adios (tmpdrf, "error writing to");
 375
 376         fclose (out);
 377
 378         if (!pushsw && verbsw) {
 379             putchar('\n');
 380             fflush (stdout);
 381         }
 382
 383         /* Pause here, if a delay is specified */
 384         if (delay > 0 && 1 < partno && partno <= nparts) {
 385             if (!pushsw) {
 386                 printf ("pausing %d seconds before sending part %d...\n",
 387                         delay, partno);
 388                 fflush (stdout);
 389             }
 390             sleep ((unsigned int) delay);
 391         }
 392
 393         snprintf (partnum, sizeof(partnum), "%d", partno);
 394         status = sendaux (vec, vecp, program, tmpdrf, st);
 395         (void) m_unlink (tmpdrf);
 396         if (status != OK)
 397             break;
 398
 399         /*
 400          * This is so sendaux will only annotate
 401          * the altmsg the first time it is called.
 402          */
 403         annotext = NULL;
 404     }
 405
 406     free (cp);
 407     mh_xfree(dp);
 408
 409     fclose (in);        /* close the draft */
 410     return status;
 411 }
 412
 413
 414 /*
 415  * Annotate original message, and
 416  * call `postproc' (which is passed down in "program") to send message.
 417  */
 418
 419 static int
 420 sendaux (char **vec, int vecp, char *program, char *drft, struct stat *st)
 421 {
 422     pid_t child_id;
 423     int i, status, fd, fd2;
 424     char backup[BUFSIZ], buf[BUFSIZ];
 425
 426     fd = pushsw ? tmp_fd () : NOTOK;
 427     fd2 = NOTOK;
 428
 429     if (annotext) {
 430         if ((fd2 = tmp_fd ()) != NOTOK) {
 431             vec[vecp++] = "-idanno";
 432             snprintf (buf, sizeof(buf), "%d", fd2);
 433             vec[vecp++] = buf;
 434         } else {
 435             admonish (NULL, "unable to create temporary file in %s "
 436                       "for annotation list", get_temp_dir());
 437         }
 438     }
 439     vec[vecp++] = drft;
 440     if (distfile && distout (drft, distfile, backup) == NOTOK)
 441         done (1);
 442     vec[vecp] = NULL;
 443
 444     for (i = 0; (child_id = fork()) == NOTOK && i < 5; i++)
 445         sleep (5);
 446
 447     switch (child_id) {
 448     case -1:
 449         /* oops -- fork error */
 450         adios ("fork", "unable to");
 451         break;  /* NOT REACHED */
 452
 453     case 0:
 454         /*
 455          * child process -- send it
 456          *
 457          * If fd is ok, then we are pushing and fd points to temp
 458          * file, so capture anything on stdout and stderr there.
 459          */
 460         if (fd != NOTOK) {
 461             dup2 (fd, fileno (stdout));
 462             dup2 (fd, fileno (stderr));
 463             close (fd);
 464         }
 465         execvp (program, vec);
 466         fprintf (stderr, "unable to exec ");
 467         perror (postproc);
 468         _exit (-1);
 469
 470     default:
 471         /*
 472          * parent process -- wait for it
 473          */
 474         if ((status = pidwait(child_id, NOTOK)) == OK) {
 475             if (annotext && fd2 != NOTOK)
 476                 anno (fd2, st);
 477         } else {
 478             /*
 479              * If postproc failed, and we have good fd (which means
 480              * we pushed), then mail error message (and possibly the
 481              * draft) back to the user.
 482              */
 483             if (fd != NOTOK) {
 484                 alert (drft, fd);
 485                 close (fd);
 486             } else {
 487                 advise (NULL, "message not delivered to anyone");
 488             }
 489             if (annotext && fd2 != NOTOK)
 490                 close (fd2);
 491             if (distfile) {
 492                 (void) m_unlink (drft);
 493                 if (rename (backup, drft) == NOTOK)
 494                     advise (drft, "unable to rename %s to", backup);
 495             }
 496         }
 497         break;
 498     }
 499
 500     return status;
 501 }
 502
 503
 504 /*
 505  * Mail error notification (and possibly a copy of the
 506  * message) back to the user, using the mailproc
 507  */
 508
 509 static void
 510 alert (char *file, int out)
 511 {
 512     pid_t child_id;
 513     int i, in, argp;
 514     char buf[BUFSIZ];
 515     char *program;
 516     char **arglist;
 517
 518     for (i = 0; (child_id = fork()) == NOTOK && i < 5; i++)
 519         sleep (5);
 520
 521     switch (child_id) {
 522         case NOTOK:
 523             /* oops -- fork error */
 524             advise ("fork", "unable to");
 525
 526         case OK:
 527             /* child process -- send it */
 528             SIGNAL (SIGHUP, SIG_IGN);
 529             SIGNAL (SIGINT, SIG_IGN);
 530             SIGNAL (SIGQUIT, SIG_IGN);
 531             SIGNAL (SIGTERM, SIG_IGN);
 532             if (forwsw) {
 533                 if ((in = open (file, O_RDONLY)) == NOTOK) {
 534                     admonish (file, "unable to re-open");
 535                 } else {
 536                     lseek (out, (off_t) 0, SEEK_END);
 537                     strncpy (buf, "\nMessage not delivered to anyone.\n", sizeof(buf));
 538                     if (write (out, buf, strlen (buf)) < 0) {
 539                         advise (file, "write");
 540                     }
 541                     strncpy (buf, "\n------- Unsent Draft\n\n", sizeof(buf));
 542                     if (write (out, buf, strlen (buf)) < 0) {
 543                         advise (file, "write");
 544                     }
 545                     cpydgst (in, out, file, "temporary file");
 546                     close (in);
 547                     strncpy (buf, "\n------- End of Unsent Draft\n", sizeof(buf));
 548                     if (write (out, buf, strlen (buf)) < 0) {
 549                         advise (file, "write");
 550                     }
 551                     if (rename (file, strncpy (buf, m_backup (file), sizeof(buf))) == NOTOK)
 552                         admonish (buf, "unable to rename %s to", file);
 553                 }
 554             }
 555             lseek (out, (off_t) 0, SEEK_SET);
 556             dup2 (out, fileno (stdin));
 557             close (out);
 558             /* create subject for error notification */
 559             snprintf (buf, sizeof(buf), "send failed on %s",
 560                         forwsw ? "enclosed draft" : file);
 561
 562             arglist = argsplit(mailproc, &program, &argp);
 563
 564             arglist[argp++] = getusername();
 565             arglist[argp++] = "-subject";
 566             arglist[argp++] = buf;
 567             arglist[argp] = NULL;
 568
 569             execvp (program, arglist);
 570             fprintf (stderr, "unable to exec ");
 571             perror (mailproc);
 572             _exit (-1);
 573
 574         default:                /* no waiting... */
 575             break;
 576     }
 577 }
 578
 579
 580 static int
 581 tmp_fd (void)
 582 {
 583     int fd;
 584     char *tfile;
 585
 586     if ((tfile = m_mktemp2(NULL, invo_name, &fd, NULL)) == NULL) return NOTOK;
 587
 588     if (debugsw)
 589         advise (NULL, "temporary file %s selected", tfile);
 590     else
 591         if (m_unlink (tfile) == NOTOK)
 592             advise (tfile, "unable to remove");
 593
 594     return fd;
 595 }
 596
 597
 598 static void
 599 anno (int fd, struct stat *st)
 600 {
 601     pid_t child_id;
 602     sigset_t set, oset;
 603     static char *cwd = NULL;
 604     struct stat st2;
 605
 606     if (altmsg &&
 607             (stat (altmsg, &st2) == NOTOK
 608                 || st->st_mtime != st2.st_mtime
 609                 || st->st_dev != st2.st_dev
 610                 || st->st_ino != st2.st_ino)) {
 611         if (debugsw)
 612             admonish (NULL, "$mhaltmsg mismatch");
 613         return;
 614     }
 615
 616     child_id = debugsw ? NOTOK : fork ();
 617     switch (child_id) {
 618         case NOTOK:             /* oops */
 619             if (!debugsw)
 620                 advise (NULL,
 621                             "unable to fork, so doing annotations by hand...");
 622             if (cwd == NULL)
 623                 cwd = mh_xstrdup(pwd ());
 624
 625         case OK:
 626             /* block a few signals */
 627             sigemptyset (&set);
 628             sigaddset (&set, SIGHUP);
 629             sigaddset (&set, SIGINT);
 630             sigaddset (&set, SIGQUIT);
 631             sigaddset (&set, SIGTERM);
 632             sigprocmask (SIG_BLOCK, &set, &oset);
 633
 634             unregister_for_removal(0);
 635
 636             annoaux (fd);
 637             if (child_id == OK)
 638                 _exit (0);
 639
 640             /* reset the signal mask */
 641             sigprocmask (SIG_SETMASK, &oset, &set);
 642
 643             if (chdir (cwd) < 0) {
 644                 advise (cwd, "chdir");
 645             }
 646             break;
 647
 648         default:                /* no waiting... */
 649             close (fd);
 650             break;
 651     }
 652 }
 653
 654
 655 static void
 656 annoaux (int fd)
 657 {
 658     int fd2, fd3, msgnum;
 659     char *cp, *folder, *maildir;
 660     char buffer[BUFSIZ], **ap;
 661     FILE *fp;
 662     struct msgs *mp;
 663
 664     if ((folder = getenv ("mhfolder")) == NULL || *folder == 0) {
 665         if (debugsw)
 666             admonish (NULL, "$mhfolder not set");
 667         return;
 668     }
 669     maildir = m_maildir (folder);
 670     if (chdir (maildir) == NOTOK) {
 671         if (debugsw)
 672             admonish (maildir, "unable to change directory to");
 673         return;
 674     }
 675     if (!(mp = folder_read (folder, 0))) {
 676         if (debugsw)
 677             admonish (NULL, "unable to read folder %s", folder);
 678         return;
 679     }
 680
 681     /* check for empty folder */
 682     if (mp->nummsg == 0) {
 683         if (debugsw)
 684             admonish (NULL, "no messages in %s", folder);
 685         goto oops;
 686     }
 687
 688     if ((cp = getenv ("mhmessages")) == NULL || *cp == 0) {
 689         if (debugsw)
 690             admonish (NULL, "$mhmessages not set");
 691         goto oops;
 692     }
 693     if (!debugsw                        /* MOBY HACK... */
 694             && pushsw
 695             && (fd3 = open ("/dev/null", O_RDWR)) != NOTOK
 696             && (fd2 = dup (fileno (stderr))) != NOTOK) {
 697         dup2 (fd3, fileno (stderr));
 698         close (fd3);
 699     }
 700     else
 701         fd2 = NOTOK;
 702     for (ap = brkstring (cp = mh_xstrdup(cp), " ", NULL); *ap; ap++)
 703         m_convert (mp, *ap);
 704     free (cp);
 705     if (fd2 != NOTOK)
 706         dup2 (fd2, fileno (stderr));
 707     if (mp->numsel == 0) {
 708         if (debugsw)
 709             admonish (NULL, "no messages to annotate");
 710         goto oops;
 711     }
 712
 713     lseek (fd, (off_t) 0, SEEK_SET);
 714     if ((fp = fdopen (fd, "r")) == NULL) {
 715         if (debugsw)
 716             admonish (NULL, "unable to fdopen annotation list");
 717         goto oops;
 718     }
 719     cp = NULL;
 720     while (fgets (buffer, sizeof(buffer), fp) != NULL)
 721         cp = add (buffer, cp);
 722     fclose (fp);
 723
 724     if (debugsw)
 725         advise (NULL, "annotate%s with %s: \"%s\"",
 726                 inplace ? " inplace" : "", annotext, cp);
 727     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++) {
 728         if (is_selected(mp, msgnum)) {
 729             if (debugsw)
 730                 advise (NULL, "annotate message %d", msgnum);
 731             annotate (m_name (msgnum), annotext, cp, inplace, 1, -2, 0);
 732         }
 733     }
 734
 735     free (cp);
 736
 737 oops:
 738     folder_free (mp);   /* free folder/message structure */
 739 }
 740
 741
 742 static
 743 void
 744 handle_sendfrom(char **vec, int *vecp, char *draft, const char *auth_svc) {
 745     const char *addr, *host;
 746     const char *message;
 747
 748     /* Extract address and host from From: header line in draft. */
 749     if (get_from_header_info(draft, &addr, &host, &message) != OK) {
 750         adios(draft, message);
 751     }
 752
 753     /* Merge in any address or host specific switches to post(1) from profile. */
 754     merge_profile_entry(addr, host, vec, vecp);
 755     free((void *) host);
 756     free((void *) addr);
 757
 758     vec[*vecp] = NULL;
 759
 760     {
 761         char **vp;
 762
 763         for (vp = vec; *vp; ++vp) {
 764             if (strcmp(*vp, "xoauth2") == 0) {
 765 #ifdef OAUTH_SUPPORT
 766                 if (setup_oauth_params(vec, vecp, auth_svc, &message) != OK) {
 767                     adios(NULL, message);
 768                 }
 769                 break;
 770 #else
 771                 NMH_UNUSED(auth_svc);
 772                 adios(NULL, "send built without OAUTH_SUPPORT, "
 773                       "so -saslmech xoauth2 is not supported");
 774 #endif /* OAUTH_SUPPORT */
 775             }
 776         }
 777     }
 778 }
 779
 780
 781 #ifdef OAUTH_SUPPORT
 782 /*
 783  * For XOAUTH2, append profile entries so post can do the heavy lifting
 784  */
 785 static int
 786 setup_oauth_params(char *vec[], int *vecp, const char *auth_svc,
 787                    const char **message) {
 788     const char *saslmech = NULL, *user = NULL;
 789     mh_oauth_service_info svc;
 790     char errbuf[256];
 791     int i;
 792
 793     /* Make sure we have all the information we need. */
 794     for (i = 1; i < *vecp; ++i) {
 795         /* Don't support abbreviated switches, to avoid collisions in the
 796            future if new ones are added. */
 797         if (! strcmp(vec[i-1], "-saslmech")) {
 798             saslmech = vec[i];
 799         } else if (! strcmp(vec[i-1], "-user")) {
 800             user = vec[i];
 801         } else if (! strcmp(vec[i-1], "-authservice")) {
 802             auth_svc = vec[i];
 803         }
 804     }
 805
 806     if (auth_svc == NULL) {
 807         if (saslmech  &&  ! strcasecmp(saslmech, "xoauth2")) {
 808             *message = "must specify -authservice with -saslmech xoauth2";
 809             return NOTOK;
 810         }
 811     } else {
 812         if (user == NULL) {
 813             *message = "must specify -user with -saslmech xoauth2";
 814             return NOTOK;
 815         }
 816
 817         if (saslmech  &&  ! strcasecmp(saslmech, "xoauth2")) {
 818             if (! mh_oauth_get_service_info(auth_svc, &svc, errbuf,
 819                                             sizeof(errbuf)))
 820                 adios(NULL, "Unable to retrieve oauth profile entries: %s",
 821                       errbuf);
 822
 823             vec[(*vecp)++] = mh_xstrdup("-authservice");
 824             vec[(*vecp)++] = mh_xstrdup(auth_svc);
 825             vec[(*vecp)++] = mh_xstrdup("-oauthcredfile");
 826             vec[(*vecp)++] = mh_xstrdup(mh_oauth_cred_fn(auth_svc));
 827             vec[(*vecp)++] = mh_xstrdup("-oauthclientid");
 828             vec[(*vecp)++] = getcpy(svc.client_id);
 829             vec[(*vecp)++] = mh_xstrdup("-oauthclientsecret");
 830             vec[(*vecp)++] = getcpy(svc.client_secret);
 831             vec[(*vecp)++] = mh_xstrdup("-oauthauthendpoint");
 832             vec[(*vecp)++] = getcpy(svc.auth_endpoint);
 833             vec[(*vecp)++] = mh_xstrdup("-oauthredirect");
 834             vec[(*vecp)++] = getcpy(svc.redirect_uri);
 835             vec[(*vecp)++] = mh_xstrdup("-oauthtokenendpoint");
 836             vec[(*vecp)++] = getcpy(svc.token_endpoint);
 837             vec[(*vecp)++] = mh_xstrdup("-oauthscope");
 838             vec[(*vecp)++] = getcpy(svc.scope);
 839         }
 840     }
 841
 842     return 0;
 843 }
 844 #endif /* OAUTH_SUPPORT */
 845
 846
 847 /*
 848  * Extract user and domain from From: header line in draft.
 849  */
 850 static
 851 int
 852 get_from_header_info(const char *filename, const char **addr, const char **host, const char **message) {
 853     struct stat st;
 854     FILE *in;
 855
 856     if (stat (filename, &st) == NOTOK) {
 857         *message = "unable to stat draft file";
 858         return NOTOK;
 859     }
 860
 861     if ((in = fopen (filename, "r")) != NULL) {
 862         /* There must be a non-blank Envelope-From or {Resent-}Sender or
 863            {Resent-}From header. */
 864         char *addrformat = "%(addr{Envelope-From})";
 865         char *hostformat = "%(host{Envelope-From})";
 866
 867         if ((*addr = get_message_header_info (in, addrformat)) == NULL  ||
 868             !**addr) {
 869             addrformat = distfile == NULL  ?  "%(addr{Sender})"  :  "%(addr{Resent-Sender})";
 870             hostformat = distfile == NULL  ?  "%(host{Sender})"  :  "%(host{Resent-Sender})";
 871
 872             if ((*addr = get_message_header_info (in, addrformat)) == NULL) {
 873                 addrformat = distfile == NULL  ?  "%(addr{From})"  :  "%(addr{Resent-From})";
 874                 hostformat = distfile == NULL  ?  "%(host{From})"  :  "%(host{Resent-From})";
 875
 876                 if ((*addr = get_message_header_info (in, addrformat)) == NULL) {
 877                     *message = "unable to find sender address in";
 878                     fclose(in);
 879                     return NOTOK;
 880                 }
 881             }
 882         }
 883
 884         /* Use the hostformat that corresponds to the successful addrformat. */
 885         if ((*host = get_message_header_info(in, hostformat)) == NULL) {
 886             fclose(in);
 887             *message = "unable to find sender host in";
 888             fclose(in);
 889             return NOTOK;
 890         }
 891         fclose(in);
 892
 893         return OK;
 894     }
 895
 896     *message = "unable to open";
 897     return NOTOK;
 898 }
 899
 900
 901 /*
 902  * Get formatted information from header of a message.
 903  * Adapted from process_single_file() in uip/fmttest.c.
 904  */
 905 static
 906 const char *
 907 get_message_header_info(FILE *in, char *format) {
 908     int dat[5];
 909     struct format *fmt;
 910     struct stat st;
 911     int parsing_header;
 912     m_getfld_state_t gstate = 0;
 913     charstring_t buffer = charstring_create(0);
 914     char *retval;
 915
 916     dat[0] = dat[1] = dat[4] = 0;
 917     dat[2] = fstat(fileno(in), &st) == 0  ?  st.st_size  :  0;
 918     dat[3] = INT_MAX;
 919
 920     (void) fmt_compile(new_fs(NULL, NULL, format), &fmt, 1);
 921     free_fs();
 922
 923     /*
 924      * Read in the message and process the header.
 925      */
 926     rewind (in);
 927     parsing_header = 1;
 928     do {
 929         char name[NAMESZ], rbuf[NMH_BUFSIZ];
 930         int bufsz = sizeof rbuf;
 931         int state = m_getfld(&gstate, name, rbuf, &bufsz, in);
 932
 933         switch (state) {
 934         case FLD:
 935         case FLDPLUS: {
 936             int bucket = fmt_addcomptext(name, rbuf);
 937
 938             if (bucket != -1) {
 939                 while (state == FLDPLUS) {
 940                     bufsz = sizeof rbuf;
 941                     state = m_getfld(&gstate, name, rbuf, &bufsz, in);
 942                     fmt_appendcomp(bucket, name, rbuf);
 943                 }
 944             }
 945
 946             while (state == FLDPLUS) {
 947                 bufsz = sizeof rbuf;
 948                 state = m_getfld(&gstate, name, rbuf, &bufsz, in);
 949             }
 950             break;
 951         }
 952         default:
 953             parsing_header = 0;
 954         }
 955     } while (parsing_header);
 956     m_getfld_state_destroy(&gstate);
 957
 958     fmt_scan(fmt, buffer, INT_MAX, dat, NULL);
 959     fmt_free(fmt, 1);
 960
 961     /* Trim trailing newline, if any. */
 962     retval = rtrim(charstring_buffer_copy((buffer)));
 963     charstring_free(buffer);
 964     if (*retval)
 965         return retval;
 966
 967     free(retval);
 968     return NULL;
 969 }
 970
 971
 972 /*
 973  * Look in profile for entry corresponding to addr or host, and add its contents to vec.
 974  *
 975  * Could do some of this automatically, by looking for:
 976  * 1) access-$(mbox{from}) in oauth-svc file using mh_oauth_cred_load(), which isn't
 977  *    static and doesn't have side effects; free the result with mh_oauth_cred_free())
 978  * 2) machine $(mbox{from}) in creds
 979  * If no -server passed in from profile or commandline, could use smtp.<svc>.com for gmail,
 980  * but that might not generalize for other svcs.
 981  */
 982 static
 983 void
 984 merge_profile_entry(const char *addr, const char *host, char *vec[], int *vecp) {
 985     char *addr_entry = concat("sendfrom-", addr, NULL);
 986     char *profile_entry = context_find(addr_entry);
 987
 988     free(addr_entry);
 989     if (profile_entry == NULL) {
 990         /* No entry for the user.  Look for one for the host. */
 991         char *host_entry = concat("sendfrom-", host, NULL);
 992
 993         profile_entry = context_find(host_entry);
 994         free(host_entry);
 995     }
 996
 997     /* Use argsplit() to do the real work of splitting the args in the profile entry. */
 998     if (profile_entry && *profile_entry) {
 999         int profile_vecp;
1000         char *file;
1001         char **profile_vec = argsplit(profile_entry, &file, &profile_vecp);
1002         int i;
1003
1004         for (i = 0; i < profile_vecp; ++i) {
1005             vec[(*vecp)++] = getcpy(profile_vec[i]);
1006         }
1007
1008         arglist_free(file, profile_vec);
1009     }
1010 }
1011
1012
1013 static void
1014 armed_done (int status)
1015 {
1016     longjmp (env, status ? status : NOTOK);
1017 }