3 * mhstoresbr.c -- routines to save/store the contents of MIME messages
10 #include <h/signals.h>
15 #include <zotnet/mts/mts.h>
16 #include <zotnet/tws/tws.h>
18 #include <h/mhparse.h>
23 * The list of top-level contents to display
30 * Cache of current directory. This must be
31 * set before these routines are called.
36 * The directory in which to store the contents.
41 * Type for a compare function for qsort. This keeps
44 typedef int (*qsort_comp) (const void *, const void *);
48 int part_ok (CT, int);
49 int type_ok (CT, int);
50 int make_intermediates (char *);
51 void flush_errors (void);
54 int show_content_aux (CT, int, int, char *, char *);
59 void store_all_messages (CT *);
64 static void store_single_message (CT);
65 static int store_switch (CT);
66 static int store_generic (CT);
67 static int store_application (CT);
68 static int store_multi (CT);
69 static int store_partial (CT);
70 static int store_external (CT);
71 static int ct_compar (CT *, CT *);
72 static int store_content (CT, CT);
73 static int output_content_file (CT, int);
74 static int check_folder (char *);
75 static int output_content_folder (char *, char *);
76 static int parse_format_string (CT, char *, char *, int, char *);
77 static void get_storeproc (CT);
78 static int copy_some_headers (FILE *, CT);
82 * Main entry point to store content
83 * from a collection of messages.
87 store_all_messages (CT *cts)
93 * Check for the directory in which to
98 else if ((cp = context_find (nmhstorage)) && *cp)
103 for (ctp = cts; *ctp; ctp++) {
105 store_single_message (ct);
113 * Entry point to store the content
114 * in a (single) message
118 store_single_message (CT ct)
120 if (type_ok (ct, 1)) {
127 if (ct->c_ceclosefnx)
128 (*ct->c_ceclosefnx) (ct);
134 * Switching routine to store different content types
140 switch (ct->c_type) {
142 return store_multi (ct);
146 switch (ct->c_subtype) {
147 case MESSAGE_PARTIAL:
148 return store_partial (ct);
151 case MESSAGE_EXTERNAL:
152 return store_external (ct);
156 return store_generic (ct);
162 return store_application (ct);
169 return store_generic (ct);
173 adios (NULL, "unknown content type %d", ct->c_type);
177 return OK; /* NOT REACHED */
182 * Generic routine to store a MIME content.
183 * (audio, video, image, text, message/rfc922)
187 store_generic (CT ct)
190 * Check if the content specifies a filename.
191 * Don't bother with this for type "message"
192 * (only "message/rfc822" will use store_generic).
194 if (autosw && ct->c_type != CT_MESSAGE)
197 return store_content (ct, NULL);
202 * Store content of type "application"
206 store_application (CT ct)
209 CI ci = &ct->c_ctinfo;
211 /* Check if the content specifies a filename */
216 * If storeproc is not defined, and the content is type
217 * "application/octet-stream", we also check for various
218 * attribute/value pairs which specify if this a tar file.
220 if (!ct->c_storeproc && ct->c_subtype == APPLICATION_OCTETS) {
221 int tarP = 0, zP = 0;
223 for (ap = ci->ci_attrs, ep = ci->ci_values; *ap; ap++, ep++) {
224 /* check for "type=tar" attribute */
225 if (!strcasecmp (*ap, "type")) {
226 if (strcasecmp (*ep, "tar"))
233 /* check for "conversions=compress" attribute */
234 if ((!strcasecmp (*ap, "conversions") || !strcasecmp (*ap, "x-conversions"))
235 && (!strcasecmp (*ep, "compress") || !strcasecmp (*ep, "x-compress"))) {
242 ct->c_showproc = add (zP ? "%euncompress | tar tvf -"
243 : "%etar tvf -", NULL);
244 if (!ct->c_storeproc) {
246 ct->c_storeproc = add (zP ? "| uncompress | tar xvpf -"
247 : "| tar xvpf -", NULL);
250 ct->c_storeproc= add (zP ? "%m%P.tar.Z" : "%m%P.tar", NULL);
256 return store_content (ct, NULL);
261 * Store the content of a multipart message
268 struct multipart *m = (struct multipart *) ct->c_ctparams;
272 for (part = m->mp_parts; part; part = part->mp_next) {
273 CT p = part->mp_part;
275 if (part_ok (p, 1) && type_ok (p, 1)) {
276 result = store_switch (p);
277 if (result == OK && ct->c_subtype == MULTI_ALTERNATE)
287 * Reassemble and store the contents of a collection
288 * of messages of type "message/partial".
292 store_partial (CT ct)
297 struct partial *pm, *qm;
299 qm = (struct partial *) ct->c_ctparams;
304 for (ctp = cts; *ctp; ctp++) {
306 if (p->c_type == CT_MESSAGE && p->c_subtype == ct->c_subtype) {
307 pm = (struct partial *) p->c_ctparams;
309 && strcmp (qm->pm_partid, pm->pm_partid) == 0) {
310 pm->pm_marked = pm->pm_partno;
322 advise (NULL, "missing (at least) last part of multipart message");
326 if ((base = (CT *) calloc ((size_t) (i + 1), sizeof(*base))) == NULL)
327 adios (NULL, "out of memory");
330 for (ctp = cts; *ctp; ctp++) {
332 if (p->c_type == CT_MESSAGE && p->c_subtype == ct->c_subtype) {
333 pm = (struct partial *) p->c_ctparams;
341 qsort ((char *) base, i, sizeof(*base), (qsort_comp) ct_compar);
344 for (ctq = base; *ctq; ctq++) {
346 pm = (struct partial *) p->c_ctparams;
347 if (pm->pm_marked != cur) {
348 if (pm->pm_marked == cur - 1) {
350 "duplicate part %d of %d part multipart message",
357 "missing %spart %d of %d part multipart message",
358 cur != hi ? "(at least) " : "", cur, hi);
370 * Now cycle through the sorted list of messages of type
371 * "message/partial" and save/append them to a file.
376 if (store_content (ct, NULL) == NOTOK) {
378 free ((char *) base);
382 for (; *ctq; ctq++) {
384 if (store_content (p, ct) == NOTOK)
388 free ((char *) base);
394 * Store content from a message of type "message/external".
398 store_external (CT ct)
401 struct exbody *e = (struct exbody *) ct->c_ctparams;
402 CT p = e->eb_content;
408 * Check if the parameters for the external body
409 * specified a filename.
414 if ((cp = e->eb_name)
419 && !strchr (cp, '%')) {
420 if (!ct->c_storeproc)
421 ct->c_storeproc = add (cp, NULL);
423 p->c_storeproc = add (cp, NULL);
428 * Since we will let the Content structure for the
429 * external body substitute for the current content,
430 * we temporarily change its partno (number inside
431 * multipart), so everything looks right.
433 p->c_partno = ct->c_partno;
435 /* we probably need to check if content is really there */
436 result = store_switch (p);
444 * Compare the numbering from two different
445 * message/partials (needed for sorting).
449 ct_compar (CT *a, CT *b)
451 struct partial *am = (struct partial *) ((*a)->c_ctparams);
452 struct partial *bm = (struct partial *) ((*b)->c_ctparams);
454 return (am->pm_marked - bm->pm_marked);
459 * Store contents of a message or message part to
460 * a folder, a file, the standard output, or pass
461 * the contents to a command.
463 * If the current content to be saved is a followup part
464 * to a collection of messages of type "message/partial",
465 * then field "p" is a pointer to the Content structure
466 * to the first message/partial in the group.
470 store_content (CT ct, CT p)
472 int appending = 0, msgnum;
473 int is_partial = 0, first_partial = 0;
474 int last_partial = 0;
475 char *cp, buffer[BUFSIZ];
478 * Do special processing for messages of
479 * type "message/partial".
481 * We first check if this content is of type
482 * "message/partial". If it is, then we need to check
483 * whether it is the first and/or last in the group.
485 * Then if "p" is a valid pointer, it points to the Content
486 * structure of the first partial in the group. So we copy
487 * the file name and/or folder name from that message. In
488 * this case, we also note that we will be appending.
490 if (ct->c_type == CT_MESSAGE && ct->c_subtype == MESSAGE_PARTIAL) {
491 struct partial *pm = (struct partial *) ct->c_ctparams;
493 /* Yep, it's a message/partial */
496 /* But is it the first and/or last in the collection? */
497 if (pm->pm_partno == 1)
499 if (pm->pm_maxno && pm->pm_partno == pm->pm_maxno)
503 * If "p" is a valid pointer, then it points to the
504 * Content structure for the first message in the group.
505 * So we just copy the filename or foldername information
506 * from the previous iteration of this function.
510 ct->c_storage = add (p->c_storage, NULL);
512 /* record the folder name */
514 ct->c_folder = add (p->c_folder, NULL);
521 * Get storage formatting string.
523 * 1) If we have storeproc defined, then use that
524 * 2) Else check for a mhn-store-<type>/<subtype> entry
525 * 3) Else check for a mhn-store-<type> entry
526 * 4) Else if content is "message", use "+" (current folder)
527 * 5) Else use string "%m%P.%s".
529 if ((cp = ct->c_storeproc) == NULL || *cp == '\0') {
530 CI ci = &ct->c_ctinfo;
532 snprintf (buffer, sizeof(buffer), "%s-store-%s/%s",
533 invo_name, ci->ci_type, ci->ci_subtype);
534 if ((cp = context_find (buffer)) == NULL || *cp == '\0') {
535 snprintf (buffer, sizeof(buffer), "%s-store-%s", invo_name, ci->ci_type);
536 if ((cp = context_find (buffer)) == NULL || *cp == '\0') {
537 cp = ct->c_type == CT_MESSAGE ? "+" : "%m%P.%s";
543 * Check the beginning of storage formatting string
544 * to see if we are saving content to a folder.
546 if (*cp == '+' || *cp == '@') {
547 char *tmpfilenam, *folder;
549 /* Store content in temporary file for now */
550 tmpfilenam = m_scratch ("", invo_name);
551 ct->c_storage = add (tmpfilenam, NULL);
553 /* Get the folder name */
555 folder = path (cp + 1, *cp == '+' ? TFOLDER : TSUBCWF);
557 folder = getfolder (1);
559 /* Check if folder exists */
560 if (check_folder (folder) == NOTOK)
563 /* Record the folder name */
564 ct->c_folder = add (folder, NULL);
573 * Parse and expand the storage formatting string
574 * in `cp' into `buffer'.
576 parse_format_string (ct, cp, buffer, sizeof(buffer), dir);
579 * If formatting begins with '|' or '!', then pass
580 * content to standard input of a command and return.
582 if (buffer[0] == '|' || buffer[0] == '!')
583 return show_content_aux (ct, 1, 0, buffer + 1, dir);
585 /* record the filename */
586 ct->c_storage = add (buffer, NULL);
589 /* flush the output stream */
592 /* Now save or append the content to a file */
593 if (output_content_file (ct, appending) == NOTOK)
597 * If necessary, link the file into a folder and remove
598 * the temporary file. If this message is a partial,
599 * then only do this if it is the last one in the group.
601 if (ct->c_folder && (!is_partial || last_partial)) {
602 msgnum = output_content_folder (ct->c_folder, ct->c_storage);
603 unlink (ct->c_storage);
609 * Now print out the name/number of the message
610 * that we are storing.
614 fprintf (stderr, "reassembling partials ");
616 fprintf (stderr, "%s", ct->c_file);
618 fprintf (stderr, "%s,", ct->c_file);
620 fprintf (stderr, "storing message %s", ct->c_file);
622 fprintf (stderr, " part %s", ct->c_partno);
626 * Unless we are in the "middle" of group of message/partials,
627 * we now print the name of the file, folder, and/or message
628 * to which we are storing the content.
630 if (!is_partial || last_partial) {
632 fprintf (stderr, " to folder %s as message %d\n", ct->c_folder, msgnum);
633 } else if (!strcmp(ct->c_storage, "-")) {
634 fprintf (stderr, " to stdout\n");
638 cwdlen = strlen (cwd);
639 fprintf (stderr, " as file %s\n",
640 strncmp (ct->c_storage, cwd, cwdlen)
641 || ct->c_storage[cwdlen] != '/'
642 ? ct->c_storage : ct->c_storage + cwdlen + 1);
651 * Output content to a file
655 output_content_file (CT ct, int appending)
658 char *file, buffer[BUFSIZ];
663 * If the pathname is absolute, make sure
664 * all the relevant directories exist.
666 if (strchr(ct->c_storage, '/')
667 && make_intermediates (ct->c_storage) == NOTOK)
670 if (ct->c_encoding != CE_7BIT) {
673 if (!ct->c_ceopenfnx) {
674 advise (NULL, "don't know how to decode part %s of message %s",
675 ct->c_partno, ct->c_file);
679 file = appending || !strcmp (ct->c_storage, "-") ? NULL
681 if ((fd = (*ct->c_ceopenfnx) (ct, &file)) == NOTOK)
683 if (!strcmp (file, ct->c_storage)) {
684 (*ct->c_ceclosefnx) (ct);
689 * Send to standard output
691 if (!strcmp (ct->c_storage, "-")) {
694 if ((gd = dup (fileno (stdout))) == NOTOK) {
695 advise ("stdout", "unable to dup");
697 (*ct->c_ceclosefnx) (ct);
700 if ((fp = fdopen (gd, appending ? "a" : "w")) == NULL) {
701 advise ("stdout", "unable to fdopen (%d, \"%s\") from", gd,
702 appending ? "a" : "w");
710 if ((fp = fopen (ct->c_storage, appending ? "a" : "w")) == NULL) {
711 advise (ct->c_storage, "unable to fopen for %s",
712 appending ? "appending" : "writing");
718 * Filter the header fields of the initial enclosing
719 * message/partial into the file.
721 if (ct->c_type == CT_MESSAGE && ct->c_subtype == MESSAGE_PARTIAL) {
722 struct partial *pm = (struct partial *) ct->c_ctparams;
724 if (pm->pm_partno == 1)
725 copy_some_headers (fp, ct);
729 switch (cc = read (fd, buffer, sizeof(buffer))) {
731 advise (file, "error reading content from");
738 fwrite (buffer, sizeof(*buffer), cc, fp);
744 (*ct->c_ceclosefnx) (ct);
746 if (cc != NOTOK && fflush (fp))
747 advise (ct->c_storage, "error writing to");
751 return (cc != NOTOK ? OK : NOTOK);
754 if (!ct->c_fp && (ct->c_fp = fopen (ct->c_file, "r")) == NULL) {
755 advise (ct->c_file, "unable to open for reading");
761 fseek (ct->c_fp, pos, SEEK_SET);
763 if (!strcmp (ct->c_storage, "-")) {
766 if ((gd = dup (fileno (stdout))) == NOTOK) {
767 advise ("stdout", "unable to dup");
770 if ((fp = fdopen (gd, appending ? "a" : "w")) == NULL) {
771 advise ("stdout", "unable to fdopen (%d, \"%s\") from", gd,
772 appending ? "a" : "w");
777 if ((fp = fopen (ct->c_storage, appending ? "a" : "w")) == NULL) {
778 advise (ct->c_storage, "unable to fopen for %s",
779 appending ? "appending" : "writing");
785 * Copy a few of the header fields of the initial
786 * enclosing message/partial into the file.
789 if (ct->c_type == CT_MESSAGE && ct->c_subtype == MESSAGE_PARTIAL) {
790 struct partial *pm = (struct partial *) ct->c_ctparams;
792 if (pm->pm_partno == 1) {
793 copy_some_headers (fp, ct);
798 while (fgets (buffer, sizeof(buffer) - 1, ct->c_fp)) {
799 if ((pos += strlen (buffer)) > last) {
802 diff = strlen (buffer) - (pos - last);
807 * If this is the first content of a group of
808 * message/partial contents, then we only copy a few
809 * of the header fields of the enclosed message.
824 if (!uprf (buffer, XXX_FIELD_PRF)
825 && !uprf (buffer, VRSN_FIELD)
826 && !uprf (buffer, "Subject:")
827 && !uprf (buffer, "Encrypted:")
828 && !uprf (buffer, "Message-ID:")) {
843 advise (ct->c_storage, "error writing to");
853 * Check if folder exists, and create
858 check_folder (char *folder)
863 /* expand path to the folder */
864 folderdir = m_mailpath (folder);
866 /* Check if folder exists */
867 if (stat (folderdir, &st) == NOTOK) {
871 if (errno != ENOENT) {
872 advise (folderdir, "error on folder");
876 ep = concat ("Create folder \"", folderdir, "\"? ", NULL);
877 answer = getanswer (ep);
883 if (!makedir (folderdir)) {
884 advise (NULL, "unable to create folder %s", folderdir);
894 * Add a file to a folder.
896 * Return the new message number of the file
897 * when added to the folder. Return -1, if
902 output_content_folder (char *folder, char *filename)
907 /* Read the folder. */
908 if ((mp = folder_read (folder))) {
909 /* Link file into folder */
910 msgnum = folder_addmsg (&mp, filename, 0, 0, 0);
912 advise (NULL, "unable to read folder %s", folder);
916 /* free folder structure */
920 * Return msgnum. We are relying on the fact that
921 * msgnum will be -1, if folder_addmsg() had an error.
928 * Parse and expand the storage formatting string
929 * pointed to by "cp" into "buffer".
933 parse_format_string (CT ct, char *cp, char *buffer, int buflen, char *dir)
937 CI ci = &ct->c_ctinfo;
940 * If storage string is "-", just copy it, and
941 * return (send content to standard output).
943 if (cp[0] == '-' && cp[1] == '\0') {
944 strncpy (buffer, cp, buflen);
952 * If formatting string is a pathname that doesn't
953 * begin with '/', then preface the path with the
954 * appropriate directory.
956 if (*cp != '/' && *cp != '|' && *cp != '!') {
957 snprintf (bp, buflen, "%s/", dir[1] ? dir : "");
965 /* We are processing a storage escape */
970 * Insert parameters from Content-Type.
971 * This is only valid for '|' commands.
973 if (buffer[0] != '|' && buffer[0] != '!') {
982 for (ap = ci->ci_attrs, ep = ci->ci_values;
984 snprintf (bp, buflen, "%s%s=\"%s\"", s, *ap, *ep);
994 /* insert message number */
995 snprintf (bp, buflen, "%s", r1bindex (ct->c_file, '/'));
999 /* insert part number with leading dot */
1001 snprintf (bp, buflen, ".%s", ct->c_partno);
1005 /* insert part number withouth leading dot */
1007 strncpy (bp, ct->c_partno, buflen);
1011 /* insert content type */
1012 strncpy (bp, ci->ci_type, buflen);
1016 /* insert content subtype */
1017 strncpy (bp, ci->ci_subtype, buflen);
1021 /* insert the character % */
1031 /* Advance bp and decrement buflen */
1049 * Check if the content specifies a filename
1050 * in its MIME parameters.
1054 get_storeproc (CT ct)
1056 char **ap, **ep, *cp;
1057 CI ci = &ct->c_ctinfo;
1060 * If the storeproc has already been defined,
1061 * we just return (for instance, if this content
1062 * is part of a "message/external".
1064 if (ct->c_storeproc)
1068 * Check the attribute/value pairs, for the attribute "name".
1069 * If found, do a few sanity checks and copy the value into
1072 for (ap = ci->ci_attrs, ep = ci->ci_values; *ap; ap++, ep++) {
1073 if (!strcasecmp (*ap, "name")
1074 && *(cp = *ep) != '/'
1078 && !strchr (cp, '%')) {
1079 ct->c_storeproc = add (cp, NULL);
1087 * Copy some of the header fields of the initial message/partial
1088 * message into the header of the reassembled message.
1092 copy_some_headers (FILE *out, CT ct)
1096 hp = ct->c_first_hf; /* start at first header field */
1100 * A few of the header fields of the enclosing
1101 * messages are not copied.
1103 if (!uprf (hp->name, XXX_FIELD_PRF)
1104 && strcasecmp (hp->name, VRSN_FIELD)
1105 && strcasecmp (hp->name, "Subject")
1106 && strcasecmp (hp->name, "Encrypted")
1107 && strcasecmp (hp->name, "Message-ID"))
1108 fprintf (out, "%s:%s", hp->name, hp->value);
1109 hp = hp->next; /* next header field */