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

   1 /* sendsbr.c -- routines to help WhatNow/Send along
   2  *
   3  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   4  * COPYRIGHT file in the root directory of the nmh distribution for
   5  * complete copyright information.
   6  */
   7
   8 #include <h/mh.h>
   9 #include <h/fmt_scan.h>
  10 #include <h/fmt_compile.h>
  11 #include <h/signals.h>
  12 #include <setjmp.h>
  13 #include <fcntl.h>
  14 #include <h/mime.h>
  15 #include <h/tws.h>
  16 #include <h/utils.h>
  17 #include <h/mts.h>
  18
  19 #ifdef HAVE_SYS_TIME_H
  20 # include <sys/time.h>
  21 #endif
  22 #include <time.h>
  23
  24 #ifdef OAUTH_SUPPORT
  25 #include <h/oauth.h>
  26 #endif
  27 #include "../sbr/m_maildir.h"
  28 #include "../sbr/m_mktemp.h"
  29 #include "../sbr/message_id.h"
  30
  31 #ifdef OAUTH_SUPPORT
  32 static int setup_oauth_params(char *[], int *, const char *, const char **);
  33 #endif /* OAUTH_SUPPORT */
  34
  35 int debugsw = 0;                /* global */
  36 int forwsw  = 1;
  37 int inplace = 1;
  38 int pushsw  = 0;
  39 int splitsw = -1;
  40 int unique  = 0;
  41 int verbsw  = 0;
  42
  43 char *altmsg   = NULL;          /*  .. */
  44 char *annotext = NULL;
  45 char *distfile = NULL;
  46
  47 static jmp_buf env;
  48
  49 /*
  50  * static prototypes
  51  */
  52 static void alert (char *, int);
  53 static int tmp_fd (void);
  54 static void anno (int, struct stat *);
  55 static void annoaux (int);
  56 static int splitmsg (char **, int, char *, char *, struct stat *, int);
  57 static int sendaux (char **, int, char *, char *, struct stat *);
  58 static void handle_sendfrom(char **, int *, char *, const char *);
  59 static int get_from_header_info(const char *, const char **, const char **, const char **);
  60 static const char *get_message_header_info(FILE *, char *);
  61 static void merge_profile_entry(const char *, const char *, char *[], int *);
  62 static void armed_done (int) NORETURN;
  63
  64 /*
  65  * Entry point into (back-end) routines to send message.
  66  */
  67
  68 int
  69 sendsbr (char **vec, int vecp, char *program, char *draft, struct stat *st,
  70          int rename_drft, const char *auth_svc)
  71 {
  72     int status, i;
  73     pid_t child;
  74     char buffer[BUFSIZ], file[BUFSIZ];
  75     struct stat sts;
  76     char **buildvec, *buildprogram;
  77     char *volatile drft = draft;
  78     /* nvecs is volatile to prevent warning from gcc about possible clobbering
  79        by longjmp. */
  80     volatile int nvecs = vecp;
  81     int *nvecsp = (int *) &nvecs;
  82
  83     /*
  84      * Run the mimebuildproc (which is by default mhbuild) on the message
  85      * with the addition of the "-auto" flag
  86      */
  87
  88     switch (child = fork()) {
  89     case NOTOK:
  90         adios("fork", "unable to");
  91         break;
  92
  93     case OK:
  94         buildvec = argsplit(buildmimeproc, &buildprogram, &i);
  95         buildvec[i++] = "-auto";
  96         if (distfile)
  97             buildvec[i++] = "-dist";
  98         buildvec[i++] = (char *) drft;
  99         buildvec[i] = NULL;
 100         execvp(buildprogram, buildvec);
 101         fprintf(stderr, "unable to exec ");
 102         perror(buildmimeproc);
 103         _exit(-1);
 104         break;
 105
 106     default:
 107         if (pidXwait(child, buildmimeproc))
 108             return NOTOK;
 109         break;
 110     }
 111
 112     done=armed_done;
 113     switch (setjmp (env)) {
 114     case OK:
 115         /*
 116          * If given -push and -unique (which is undocumented), then
 117          * rename the draft file.  I'm not quite sure why.
 118          */
 119         if (pushsw && unique) {
 120             char *cp = m_mktemp2(drft, invo_name, NULL, NULL);
 121             if (cp == NULL) {
 122                 adios(NULL, "unable to create temporary file in %s",
 123                       get_temp_dir());
 124             }
 125             if (rename (drft, strncpy(file, cp, sizeof(file))) == NOTOK)
 126                 adios (file, "unable to rename %s to", drft);
 127             drft = file;
 128         }
 129
 130         /*
 131          * Add in any necessary profile entries for xoauth
 132          */
 133
 134         if (auth_svc) {
 135 #ifdef OAUTH_SUPPORT
 136                 const char *errmsg;
 137                 if (setup_oauth_params(vec, nvecsp, auth_svc, &errmsg) != OK) {
 138                         adios(NULL, errmsg);
 139                 }
 140 #else
 141                 adios(NULL, "send built without OAUTH_SUPPORT, "
 142                       "so auth_svc %s is not supported", auth_svc);
 143 #endif /* OAUTH_SUPPORT */
 144         }
 145
 146         /*
 147          * Rework the vec based on From: header in draft, as specified
 148          * by sendfrom-address entries in profile.
 149          */
 150         if (context_find_prefix("sendfrom-")) {
 151             handle_sendfrom(vec, nvecsp, draft, auth_svc);
 152         }
 153
 154         /*
 155          * Check if we need to split the message into
 156          * multiple messages of type "message/partial".
 157          */
 158         if (splitsw >= 0 && !distfile && stat ((char *) drft, &sts) != NOTOK
 159                 && sts.st_size >= CPERMSG) {
 160             status = splitmsg (vec, nvecs, program, drft,
 161                                st, splitsw) ? NOTOK : OK;
 162         } else {
 163             status = sendaux (vec, nvecs, program, drft, st) ? NOTOK : OK;
 164         }
 165
 166         /* rename the original draft */
 167         if (rename_drft && status == OK &&
 168                 rename (drft, strncpy (buffer, m_backup (drft),
 169                                  sizeof(buffer))) == NOTOK)
 170             advise (buffer, "unable to rename %s to", drft);
 171         break;
 172
 173     default:
 174         status = DONE;
 175         break;
 176     }
 177
 178     done=exit;
 179     if (distfile)
 180         (void) m_unlink (distfile);
 181
 182     return status;
 183 }
 184
 185 /*
 186  * Split large message into several messages of
 187  * type "message/partial" and send them.
 188  */
 189
 190 static int
 191 splitmsg (char **vec, int vecp, char *program, char *drft,
 192           struct stat *st, int delay)
 193 {
 194     int compnum, nparts, partno, state, status;
 195     long pos, start;
 196     time_t clock;
 197     char *cp, *dp, buffer[NMH_BUFSIZ], msgid[BUFSIZ];
 198     char subject[BUFSIZ];
 199     char name[NAMESZ], partnum[BUFSIZ];
 200     FILE *in;
 201     m_getfld_state_t gstate = 0;
 202
 203     if ((in = fopen (drft, "r")) == NULL)
 204         adios (drft, "unable to open for reading");
 205
 206     cp = dp = NULL;
 207     start = 0L;
 208
 209     /*
 210      * Scan through the message and examine the various header fields,
 211      * as well as locate the beginning of the message body.
 212      */
 213     m_getfld_track_filepos (&gstate, in);
 214     for (compnum = 1;;) {
 215         int bufsz = sizeof buffer;
 216         switch (state = m_getfld (&gstate, name, buffer, &bufsz, in)) {
 217             case FLD:
 218             case FLDPLUS:
 219                 compnum++;
 220
 221                 /*
 222                  * This header field is discarded.
 223                  */
 224                 if (!strcasecmp (name, "Message-ID")) {
 225                     while (state == FLDPLUS) {
 226                         bufsz = sizeof buffer;
 227                         state = m_getfld (&gstate, name, buffer, &bufsz, in);
 228                     }
 229                 } else if (uprf (name, XXX_FIELD_PRF)
 230                         || !strcasecmp (name, VRSN_FIELD)
 231                         || !strcasecmp (name, "Subject")
 232                         || !strcasecmp (name, "Encrypted")) {
 233                     /*
 234                      * These header fields are copied to the enclosed
 235                      * header of the first message in the collection
 236                      * of message/partials.  For the "Subject" header
 237                      * field, we also record it, so that a modified
 238                      * version of it, can be copied to the header
 239                      * of each message/partial in the collection.
 240                      */
 241                     if (!strcasecmp (name, "Subject")) {
 242                         size_t sublen;
 243
 244                         strncpy (subject, buffer, BUFSIZ);
 245                         sublen = strlen (subject);
 246                         if (sublen > 0 && subject[sublen - 1] == '\n')
 247                             subject[sublen - 1] = '\0';
 248                     }
 249
 250                     dp = add (concat (name, ":", buffer, NULL), dp);
 251                     while (state == FLDPLUS) {
 252                         bufsz = sizeof buffer;
 253                         state = m_getfld (&gstate, name, buffer, &bufsz, in);
 254                         dp = add (buffer, dp);
 255                     }
 256                 } else {
 257                     /*
 258                      * These header fields are copied to the header of
 259                      * each message/partial in the collection.
 260                      */
 261                     cp = add (concat (name, ":", buffer, NULL), cp);
 262                     while (state == FLDPLUS) {
 263                         bufsz = sizeof buffer;
 264                         state = m_getfld (&gstate, name, buffer, &bufsz, in);
 265                         cp = add (buffer, cp);
 266                     }
 267                 }
 268
 269                 start = ftell (in) + 1;
 270                 continue;
 271
 272            case BODY:
 273            case FILEEOF:
 274                 break;
 275
 276            case LENERR:
 277            case FMTERR:
 278                 adios (NULL, "message format error in component #%d", compnum);
 279
 280            default:
 281                 adios (NULL, "getfld () returned %d", state);
 282         }
 283
 284         break;
 285     }
 286     m_getfld_state_destroy (&gstate);
 287     if (cp == NULL)
 288         adios (NULL, "headers missing from draft");
 289
 290     nparts = 1;
 291     pos = start;
 292     while (fgets (buffer, sizeof buffer, in)) {
 293         long len;
 294
 295         if ((pos += (len = strlen (buffer))) > CPERMSG) {
 296             nparts++;
 297             pos = len;
 298         }
 299     }
 300
 301     /* Only one part, nothing to split */
 302     if (nparts == 1) {
 303         free (cp);
 304         mh_xfree(dp);
 305
 306         fclose (in);
 307         return sendaux (vec, vecp, program, drft, st);
 308     }
 309
 310     if (!pushsw) {
 311         printf ("Sending as %d Partial Messages\n", nparts);
 312         fflush (stdout);
 313     }
 314     status = OK;
 315
 316     vec[vecp++] = "-partno";
 317     vec[vecp++] = partnum;
 318     if (delay == 0)
 319         vec[vecp++] = "-queued";
 320
 321     time (&clock);
 322     snprintf (msgid, sizeof(msgid), "%s", message_id (clock, 0));
 323
 324     fseek (in, start, SEEK_SET);
 325     for (partno = 1; partno <= nparts; partno++) {
 326         char tmpdrf[BUFSIZ];
 327         FILE *out;
 328
 329         char *cp = m_mktemp2(drft, invo_name, NULL, &out);
 330         if (cp == NULL) {
 331             adios(NULL, "unable to create temporary file in %s",
 332                   get_temp_dir());
 333         }
 334         strncpy(tmpdrf, cp, sizeof(tmpdrf));
 335
 336         /*
 337          * Output the header fields
 338          */
 339         fputs (cp, out);
 340         fprintf (out, "Subject: %s (part %d of %d)\n", subject, partno, nparts);
 341         fprintf (out, "%s: %s\n", VRSN_FIELD, VRSN_VALUE);
 342         fprintf (out, "%s: message/partial; id=\"%s\";\n", TYPE_FIELD, msgid);
 343         fprintf (out, "\tnumber=%d; total=%d\n", partno, nparts);
 344         fprintf (out, "%s: part %d of %d\n\n", DESCR_FIELD, partno, nparts);
 345
 346         /*
 347          * If this is the first in the collection, output the
 348          * header fields we are encapsulating at the beginning
 349          * of the body of the first message.
 350          */
 351         if (partno == 1) {
 352             if (dp)
 353                 fputs (dp, out);
 354             fprintf (out, "Message-ID: %s\n", msgid);
 355             fprintf (out, "\n");
 356         }
 357
 358         pos = 0;
 359         for (;;) {
 360             long len;
 361
 362             if (!fgets (buffer, sizeof buffer, in)) {
 363                 if (partno == nparts)
 364                     break;
 365                 adios (NULL, "premature eof");
 366             }
 367
 368             if ((pos += (len = strlen (buffer))) > CPERMSG) {
 369                 fseek (in, -len, SEEK_CUR);
 370                 break;
 371             }
 372
 373             fputs (buffer, out);
 374         }
 375
 376         if (fflush (out))
 377             adios (tmpdrf, "error writing to");
 378
 379         fclose (out);
 380
 381         if (!pushsw && verbsw) {
 382             putchar('\n');
 383             fflush (stdout);
 384         }
 385
 386         /* Pause here, if a delay is specified */
 387         if (delay > 0 && 1 < partno && partno <= nparts) {
 388             if (!pushsw) {
 389                 printf ("pausing %d seconds before sending part %d...\n",
 390                         delay, partno);
 391                 fflush (stdout);
 392             }
 393             sleep ((unsigned int) delay);
 394         }
 395
 396         snprintf (partnum, sizeof(partnum), "%d", partno);
 397         status = sendaux (vec, vecp, program, tmpdrf, st);
 398         (void) m_unlink (tmpdrf);
 399         if (status != OK)
 400             break;
 401
 402         /*
 403          * This is so sendaux will only annotate
 404          * the altmsg the first time it is called.
 405          */
 406         annotext = NULL;
 407     }
 408
 409     free (cp);
 410     mh_xfree(dp);
 411
 412     fclose (in);        /* close the draft */
 413     return status;
 414 }
 415
 416
 417 /*
 418  * Annotate original message, and
 419  * call `postproc' (which is passed down in "program") to send message.
 420  */
 421
 422 static int
 423 sendaux (char **vec, int vecp, char *program, char *drft, struct stat *st)
 424 {
 425     pid_t child_id;
 426     int i, status, fd, fd2;
 427     char backup[BUFSIZ], buf[BUFSIZ];
 428
 429     fd = pushsw ? tmp_fd () : NOTOK;
 430     fd2 = NOTOK;
 431
 432     if (annotext) {
 433         if ((fd2 = tmp_fd ()) != NOTOK) {
 434             vec[vecp++] = "-idanno";
 435             snprintf (buf, sizeof(buf), "%d", fd2);
 436             vec[vecp++] = buf;
 437         } else {
 438             inform("unable to create temporary file in %s for "
 439                 "annotation list, continuing...", get_temp_dir());
 440         }
 441     }
 442     vec[vecp++] = drft;
 443     if (distfile && distout (drft, distfile, backup) == NOTOK)
 444         done (1);
 445     vec[vecp] = NULL;
 446
 447     for (i = 0; (child_id = fork()) == NOTOK && i < 5; i++)
 448         sleep (5);
 449
 450     switch (child_id) {
 451     case -1:
 452         /* oops -- fork error */
 453         adios ("fork", "unable to");
 454         break;  /* NOT REACHED */
 455
 456     case 0:
 457         /*
 458          * child process -- send it
 459          *
 460          * If fd is OK, then we are pushing and fd points to temp
 461          * file, so capture anything on stdout and stderr there.
 462          */
 463         if (fd != NOTOK) {
 464             dup2 (fd, fileno (stdout));
 465             dup2 (fd, fileno (stderr));
 466             close (fd);
 467         }
 468         execvp (program, vec);
 469         fprintf (stderr, "unable to exec ");
 470         perror (postproc);
 471         _exit (-1);
 472
 473     default:
 474         /*
 475          * parent process -- wait for it
 476          */
 477         if ((status = pidwait(child_id, NOTOK)) == OK) {
 478             if (annotext && fd2 != NOTOK)
 479                 anno (fd2, st);
 480         } else {
 481             /*
 482              * If postproc failed, and we have good fd (which means
 483              * we pushed), then mail error message (and possibly the
 484              * draft) back to the user.
 485              */
 486             if (fd != NOTOK) {
 487                 alert (drft, fd);
 488                 close (fd);
 489             } else {
 490                 inform("message not delivered to anyone");
 491             }
 492             if (annotext && fd2 != NOTOK)
 493                 close (fd2);
 494             if (distfile) {
 495                 (void) m_unlink (drft);
 496                 if (rename (backup, drft) == NOTOK)
 497                     advise (drft, "unable to rename %s to", backup);
 498             }
 499         }
 500         break;
 501     }
 502
 503     return status;
 504 }
 505
 506
 507 /*
 508  * Mail error notification (and possibly a copy of the
 509  * message) back to the user, using the mailproc
 510  */
 511
 512 static void
 513 alert (char *file, int out)
 514 {
 515     pid_t child_id;
 516     int i, in, argp;
 517     char buf[BUFSIZ];
 518     char *program;
 519     char **arglist;
 520
 521     for (i = 0; (child_id = fork()) == NOTOK && i < 5; i++)
 522         sleep (5);
 523
 524     switch (child_id) {
 525         case NOTOK:
 526             /* oops -- fork error */
 527             advise ("fork", "unable to");
 528             /* FALLTHRU */
 529
 530         case OK:
 531             /* child process -- send it */
 532             SIGNAL (SIGHUP, SIG_IGN);
 533             SIGNAL (SIGINT, SIG_IGN);
 534             SIGNAL (SIGQUIT, SIG_IGN);
 535             SIGNAL (SIGTERM, SIG_IGN);
 536             if (forwsw) {
 537                 if ((in = open (file, O_RDONLY)) == NOTOK) {
 538                     admonish (file, "unable to re-open");
 539                 } else {
 540                     lseek(out, 0, SEEK_END);
 541                     strncpy (buf, "\nMessage not delivered to anyone.\n", sizeof(buf));
 542                     if (write (out, buf, strlen (buf)) < 0) {
 543                         advise (file, "write");
 544                     }
 545                     strncpy (buf, "\n------- Unsent Draft\n\n", sizeof(buf));
 546                     if (write (out, buf, strlen (buf)) < 0) {
 547                         advise (file, "write");
 548                     }
 549                     cpydgst (in, out, file, "temporary file");
 550                     close (in);
 551                     strncpy (buf, "\n------- End of Unsent Draft\n", sizeof(buf));
 552                     if (write (out, buf, strlen (buf)) < 0) {
 553                         advise (file, "write");
 554                     }
 555                     if (rename (file, strncpy (buf, m_backup (file), sizeof(buf))) == NOTOK)
 556                         admonish (buf, "unable to rename %s to", file);
 557                 }
 558             }
 559             lseek(out, 0, SEEK_SET);
 560             dup2 (out, fileno (stdin));
 561             close (out);
 562             /* create subject for error notification */
 563             snprintf (buf, sizeof(buf), "send failed on %s",
 564                         forwsw ? "enclosed draft" : file);
 565
 566             arglist = argsplit(mailproc, &program, &argp);
 567
 568             arglist[argp++] = getusername();
 569             arglist[argp++] = "-subject";
 570             arglist[argp++] = buf;
 571             arglist[argp] = NULL;
 572
 573             execvp (program, arglist);
 574             fprintf (stderr, "unable to exec ");
 575             perror (mailproc);
 576             _exit (-1);
 577
 578         default:                /* no waiting... */
 579             break;
 580     }
 581 }
 582
 583
 584 static int
 585 tmp_fd (void)
 586 {
 587     int fd;
 588     char *tfile;
 589
 590     if ((tfile = m_mktemp2(NULL, invo_name, &fd, NULL)) == NULL) return NOTOK;
 591
 592     if (debugsw)
 593         inform("temporary file %s selected", tfile);
 594     else
 595         if (m_unlink (tfile) == NOTOK)
 596             advise (tfile, "unable to remove");
 597
 598     return fd;
 599 }
 600
 601
 602 static void
 603 anno (int fd, struct stat *st)
 604 {
 605     pid_t child_id;
 606     sigset_t set, oset;
 607     static char *cwd = NULL;
 608     struct stat st2;
 609
 610     if (altmsg &&
 611             (stat (altmsg, &st2) == NOTOK
 612                 || st->st_mtime != st2.st_mtime
 613                 || st->st_dev != st2.st_dev
 614                 || st->st_ino != st2.st_ino)) {
 615         if (debugsw)
 616             inform("$mhaltmsg mismatch, continuing...");
 617         return;
 618     }
 619
 620     child_id = debugsw ? NOTOK : fork ();
 621     switch (child_id) {
 622         case NOTOK:             /* oops */
 623             if (!debugsw)
 624                 inform("unable to fork, so doing annotations by hand...");
 625             if (cwd == NULL)
 626                 cwd = mh_xstrdup(pwd ());
 627             /* FALLTHRU */
 628
 629         case OK:
 630             /* block a few signals */
 631             sigemptyset (&set);
 632             sigaddset (&set, SIGHUP);
 633             sigaddset (&set, SIGINT);
 634             sigaddset (&set, SIGQUIT);
 635             sigaddset (&set, SIGTERM);
 636             sigprocmask (SIG_BLOCK, &set, &oset);
 637
 638             unregister_for_removal(0);
 639
 640             annoaux (fd);
 641             if (child_id == OK)
 642                 _exit (0);
 643
 644             /* reset the signal mask */
 645             sigprocmask (SIG_SETMASK, &oset, &set);
 646
 647             if (chdir (cwd) < 0) {
 648                 advise (cwd, "chdir");
 649             }
 650             break;
 651
 652         default:                /* no waiting... */
 653             close (fd);
 654             break;
 655     }
 656 }
 657
 658
 659 static void
 660 annoaux (int fd)
 661 {
 662     int fd2, fd3, msgnum;
 663     char *cp, *folder, *maildir;
 664     char buffer[BUFSIZ], **ap;
 665     FILE *fp;
 666     struct msgs *mp;
 667
 668     if ((folder = getenv ("mhfolder")) == NULL || *folder == 0) {
 669         if (debugsw)
 670             inform("$mhfolder not set, continuing...");
 671         return;
 672     }
 673     maildir = m_maildir (folder);
 674     if (chdir (maildir) == NOTOK) {
 675         if (debugsw)
 676             admonish (maildir, "unable to change directory to");
 677         return;
 678     }
 679     if (!(mp = folder_read (folder, 0))) {
 680         if (debugsw)
 681             inform("unable to read folder %s, continuing...", folder);
 682         return;
 683     }
 684
 685     /* check for empty folder */
 686     if (mp->nummsg == 0) {
 687         if (debugsw)
 688             inform("no messages in %s, continuing...", folder);
 689         goto oops;
 690     }
 691
 692     if ((cp = getenv ("mhmessages")) == NULL || *cp == 0) {
 693         if (debugsw)
 694             inform("$mhmessages not set, continuing...");
 695         goto oops;
 696     }
 697     if (!debugsw                        /* MOBY HACK... */
 698             && pushsw
 699             && (fd3 = open ("/dev/null", O_RDWR)) != NOTOK
 700             && (fd2 = dup (fileno (stderr))) != NOTOK) {
 701         dup2 (fd3, fileno (stderr));
 702         close (fd3);
 703     }
 704     else
 705         fd2 = NOTOK;
 706     for (ap = brkstring (cp = mh_xstrdup(cp), " ", NULL); *ap; ap++)
 707         m_convert (mp, *ap);
 708     free (cp);
 709     if (fd2 != NOTOK)
 710         dup2 (fd2, fileno (stderr));
 711     if (mp->numsel == 0) {
 712         if (debugsw)
 713             inform("no messages to annotate, continuing...");
 714         goto oops;
 715     }
 716
 717     lseek(fd, 0, SEEK_SET);
 718     if ((fp = fdopen (fd, "r")) == NULL) {
 719         if (debugsw)
 720             inform("unable to fdopen annotation list, continuing...");
 721         goto oops;
 722     }
 723     cp = NULL;
 724     while (fgets (buffer, sizeof(buffer), fp) != NULL)
 725         cp = add (buffer, cp);
 726     fclose (fp);
 727
 728     if (debugsw)
 729         inform("annotate%s with %s: \"%s\"",
 730                 inplace ? " inplace" : "", annotext, cp);
 731     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++) {
 732         if (is_selected(mp, msgnum)) {
 733             if (debugsw)
 734                 inform("annotate message %d", msgnum);
 735             annotate (m_name (msgnum), annotext, cp, inplace, 1, -2, 0);
 736         }
 737     }
 738
 739     free (cp);
 740
 741 oops:
 742     folder_free (mp);   /* free folder/message structure */
 743 }
 744
 745
 746 static
 747 void
 748 handle_sendfrom(char **vec, int *vecp, char *draft, const char *auth_svc) {
 749     const char *addr, *host;
 750     const char *message;
 751
 752     /* Extract address and host from From: header line in draft. */
 753     if (get_from_header_info(draft, &addr, &host, &message) != OK) {
 754         adios(draft, message);
 755     }
 756
 757     /* Merge in any address or host specific switches to post(1) from profile. */
 758     merge_profile_entry(addr, host, vec, vecp);
 759     free((void *) host);
 760     free((void *) addr);
 761
 762     vec[*vecp] = NULL;
 763
 764     {
 765         char **vp;
 766
 767         for (vp = vec; *vp; ++vp) {
 768             if (strcmp(*vp, "xoauth2") == 0) {
 769 #ifdef OAUTH_SUPPORT
 770                 if (setup_oauth_params(vec, vecp, auth_svc, &message) != OK) {
 771                     adios(NULL, message);
 772                 }
 773                 break;
 774 #else
 775                 NMH_UNUSED(auth_svc);
 776                 adios(NULL, "send built without OAUTH_SUPPORT, "
 777                       "so -saslmech xoauth2 is not supported");
 778 #endif /* OAUTH_SUPPORT */
 779             }
 780         }
 781     }
 782 }
 783
 784
 785 #ifdef OAUTH_SUPPORT
 786 /*
 787  * For XOAUTH2, append profile entries so post can do the heavy lifting
 788  */
 789 static int
 790 setup_oauth_params(char *vec[], int *vecp, const char *auth_svc,
 791                    const char **message) {
 792     const char *saslmech = NULL, *user = NULL;
 793     mh_oauth_service_info svc;
 794     char errbuf[256];
 795     int i;
 796
 797     /* Make sure we have all the information we need. */
 798     for (i = 1; i < *vecp; ++i) {
 799         /* Don't support abbreviated switches, to avoid collisions in the
 800            future if new ones are added. */
 801         if (! strcmp(vec[i-1], "-saslmech")) {
 802             saslmech = vec[i];
 803         } else if (! strcmp(vec[i-1], "-user")) {
 804             user = vec[i];
 805         } else if (! strcmp(vec[i-1], "-authservice")) {
 806             auth_svc = vec[i];
 807         }
 808     }
 809
 810     if (auth_svc == NULL) {
 811         if (saslmech  &&  ! strcasecmp(saslmech, "xoauth2")) {
 812             *message = "must specify -authservice with -saslmech xoauth2";
 813             return NOTOK;
 814         }
 815     } else {
 816         if (user == NULL) {
 817             *message = "must specify -user with -saslmech xoauth2";
 818             return NOTOK;
 819         }
 820
 821         if (saslmech  &&  ! strcasecmp(saslmech, "xoauth2")) {
 822             if (! mh_oauth_get_service_info(auth_svc, &svc, errbuf,
 823                                             sizeof(errbuf)))
 824                 adios(NULL, "Unable to retrieve oauth profile entries: %s",
 825                       errbuf);
 826
 827             vec[(*vecp)++] = mh_xstrdup("-authservice");
 828             vec[(*vecp)++] = mh_xstrdup(auth_svc);
 829             vec[(*vecp)++] = mh_xstrdup("-oauthcredfile");
 830             vec[(*vecp)++] = mh_xstrdup(mh_oauth_cred_fn(auth_svc));
 831             vec[(*vecp)++] = mh_xstrdup("-oauthclientid");
 832             vec[(*vecp)++] = getcpy(svc.client_id);
 833             vec[(*vecp)++] = mh_xstrdup("-oauthclientsecret");
 834             vec[(*vecp)++] = getcpy(svc.client_secret);
 835             vec[(*vecp)++] = mh_xstrdup("-oauthauthendpoint");
 836             vec[(*vecp)++] = getcpy(svc.auth_endpoint);
 837             vec[(*vecp)++] = mh_xstrdup("-oauthredirect");
 838             vec[(*vecp)++] = getcpy(svc.redirect_uri);
 839             vec[(*vecp)++] = mh_xstrdup("-oauthtokenendpoint");
 840             vec[(*vecp)++] = getcpy(svc.token_endpoint);
 841             vec[(*vecp)++] = mh_xstrdup("-oauthscope");
 842             vec[(*vecp)++] = getcpy(svc.scope);
 843         }
 844     }
 845
 846     return 0;
 847 }
 848 #endif /* OAUTH_SUPPORT */
 849
 850
 851 /*
 852  * Extract user and domain from From: header line in draft.
 853  */
 854 static
 855 int
 856 get_from_header_info(const char *filename, const char **addr, const char **host, const char **message) {
 857     struct stat st;
 858     FILE *in;
 859
 860     if (stat (filename, &st) == NOTOK) {
 861         *message = "unable to stat draft file";
 862         return NOTOK;
 863     }
 864
 865     if ((in = fopen (filename, "r")) != NULL) {
 866         /* There must be a non-blank Envelope-From or {Resent-}Sender or
 867            {Resent-}From header. */
 868         char *addrformat = "%(addr{Envelope-From})";
 869         char *hostformat = "%(host{Envelope-From})";
 870
 871         if ((*addr = get_message_header_info (in, addrformat)) == NULL  ||
 872             !**addr) {
 873             addrformat = distfile == NULL  ?  "%(addr{Sender})"  :  "%(addr{Resent-Sender})";
 874             hostformat = distfile == NULL  ?  "%(host{Sender})"  :  "%(host{Resent-Sender})";
 875
 876             if ((*addr = get_message_header_info (in, addrformat)) == NULL) {
 877                 addrformat = distfile == NULL  ?  "%(addr{From})"  :  "%(addr{Resent-From})";
 878                 hostformat = distfile == NULL  ?  "%(host{From})"  :  "%(host{Resent-From})";
 879
 880                 if ((*addr = get_message_header_info (in, addrformat)) == NULL) {
 881                     *message = "unable to find sender address in";
 882                     fclose(in);
 883                     return NOTOK;
 884                 }
 885             }
 886         }
 887
 888         /* Use the hostformat that corresponds to the successful addrformat. */
 889         if ((*host = get_message_header_info(in, hostformat)) == NULL) {
 890             fclose(in);
 891             *message = "unable to find sender host in";
 892             fclose(in);
 893             return NOTOK;
 894         }
 895         fclose(in);
 896
 897         return OK;
 898     }
 899
 900     *message = "unable to open";
 901     return NOTOK;
 902 }
 903
 904
 905 /*
 906  * Get formatted information from header of a message.
 907  * Adapted from process_single_file() in uip/fmttest.c.
 908  */
 909 static
 910 const char *
 911 get_message_header_info(FILE *in, char *format) {
 912     int dat[5];
 913     struct format *fmt;
 914     struct stat st;
 915     int parsing_header;
 916     m_getfld_state_t gstate = 0;
 917     charstring_t buffer = charstring_create(0);
 918     char *retval;
 919
 920     dat[0] = dat[1] = dat[4] = 0;
 921     dat[2] = fstat(fileno(in), &st) == 0  ?  st.st_size  :  0;
 922     dat[3] = INT_MAX;
 923
 924     (void) fmt_compile(new_fs(NULL, NULL, format), &fmt, 1);
 925     free_fs();
 926
 927     /*
 928      * Read in the message and process the header.
 929      */
 930     rewind (in);
 931     parsing_header = 1;
 932     do {
 933         char name[NAMESZ], rbuf[NMH_BUFSIZ];
 934         int bufsz = sizeof rbuf;
 935         int state = m_getfld(&gstate, name, rbuf, &bufsz, in);
 936
 937         switch (state) {
 938         case FLD:
 939         case FLDPLUS: {
 940             int bucket = fmt_addcomptext(name, rbuf);
 941
 942             if (bucket != -1) {
 943                 while (state == FLDPLUS) {
 944                     bufsz = sizeof rbuf;
 945                     state = m_getfld(&gstate, name, rbuf, &bufsz, in);
 946                     fmt_appendcomp(bucket, name, rbuf);
 947                 }
 948             }
 949
 950             while (state == FLDPLUS) {
 951                 bufsz = sizeof rbuf;
 952                 state = m_getfld(&gstate, name, rbuf, &bufsz, in);
 953             }
 954             break;
 955         }
 956         default:
 957             parsing_header = 0;
 958         }
 959     } while (parsing_header);
 960     m_getfld_state_destroy(&gstate);
 961
 962     fmt_scan(fmt, buffer, INT_MAX, dat, NULL);
 963     fmt_free(fmt, 1);
 964
 965     /* Trim trailing newline, if any. */
 966     retval = rtrim(charstring_buffer_copy((buffer)));
 967     charstring_free(buffer);
 968     if (*retval)
 969         return retval;
 970
 971     free(retval);
 972     return NULL;
 973 }
 974
 975
 976 /*
 977  * Look in profile for entry corresponding to addr or host, and add its contents to vec.
 978  *
 979  * Could do some of this automatically, by looking for:
 980  * 1) access-$(mbox{from}) in oauth-svc file using mh_oauth_cred_load(), which isn't
 981  *    static and doesn't have side effects; free the result with mh_oauth_cred_free())
 982  * 2) machine $(mbox{from}) in creds
 983  * If no -server passed in from profile or commandline, could use smtp.<svc>.com for gmail,
 984  * but that might not generalize for other svcs.
 985  */
 986 static
 987 void
 988 merge_profile_entry(const char *addr, const char *host, char *vec[], int *vecp) {
 989     char *addr_entry = concat("sendfrom-", addr, NULL);
 990     char *profile_entry = context_find(addr_entry);
 991
 992     free(addr_entry);
 993     if (profile_entry == NULL) {
 994         /* No entry for the user.  Look for one for the host. */
 995         char *host_entry = concat("sendfrom-", host, NULL);
 996
 997         profile_entry = context_find(host_entry);
 998         free(host_entry);
 999     }
1000
1001     /* Use argsplit() to do the real work of splitting the args in the profile entry. */
1002     if (profile_entry && *profile_entry) {
1003         int profile_vecp;
1004         char *file;
1005         char **profile_vec = argsplit(profile_entry, &file, &profile_vecp);
1006         int i;
1007
1008         for (i = 0; i < profile_vecp; ++i) {
1009             vec[(*vecp)++] = getcpy(profile_vec[i]);
1010         }
1011
1012         arglist_free(file, profile_vec);
1013     }
1014 }
1015
1016
1017 static void NORETURN
1018 armed_done (int status)
1019 {
1020     longjmp (env, status ? status : NOTOK);
1021 }