/* * mhstoresbr.c -- routines to save/store the contents of MIME messages * * $Id: mhstoresbr.c,v 1.1.1.1 1999-02-07 18:14:15 danw Exp $ */ #include #include #include #include #include #include #include #include #include #include #include extern int errno; /* * The list of top-level contents to display */ extern CT *cts; int autosw = 0; /* * Cache of current directory. This must be * set before these routines are called. */ char *cwd; /* * The directory in which to store the contents. */ static char *dir; /* * Type for a compare function for qsort. This keeps * the compiler happy. */ typedef int (*qsort_comp) (const void *, const void *); /* mhmisc.c */ int part_ok (CT, int); int type_ok (CT, int); int make_intermediates (char *); void flush_errors (void); /* mhshowsbr.c */ int show_content_aux (CT, int, int, char *, char *); /* * prototypes */ void store_all_messages (CT *); /* * static prototypes */ static void store_single_message (CT); static int store_switch (CT); static int store_generic (CT); static int store_application (CT); static int store_multi (CT); static int store_partial (CT); static int store_external (CT); static int ct_compar (CT *, CT *); static int store_content (CT, CT); static int output_content_file (CT, int); static int check_folder (char *); static int output_content_folder (char *, char *); static int parse_format_string (CT, char *, char *, int, char *); static void get_storeproc (CT); static int copy_some_headers (FILE *, CT); /* * Main entry point to store content * from a collection of messages. */ void store_all_messages (CT *cts) { CT ct, *ctp; char *cp; /* * Check for the directory in which to * store any contents. */ if (autosw) dir = getcpy (cwd); else if ((cp = context_find (nmhstorage)) && *cp) dir = getcpy (cp); else dir = getcpy (cwd); for (ctp = cts; *ctp; ctp++) { ct = *ctp; store_single_message (ct); } flush_errors (); } /* * Entry point to store the content * in a (single) message */ static void store_single_message (CT ct) { if (type_ok (ct, 1)) { umask (ct->c_umask); store_switch (ct); if (ct->c_fp) { fclose (ct->c_fp); ct->c_fp = NULL; } if (ct->c_ceclosefnx) (*ct->c_ceclosefnx) (ct); } } /* * Switching routine to store different content types */ static int store_switch (CT ct) { switch (ct->c_type) { case CT_MULTIPART: return store_multi (ct); break; case CT_MESSAGE: switch (ct->c_subtype) { case MESSAGE_PARTIAL: return store_partial (ct); break; case MESSAGE_EXTERNAL: return store_external (ct); case MESSAGE_RFC822: default: return store_generic (ct); break; } break; case CT_APPLICATION: return store_application (ct); break; case CT_TEXT: case CT_AUDIO: case CT_IMAGE: case CT_VIDEO: return store_generic (ct); break; default: adios (NULL, "unknown content type %d", ct->c_type); break; } return OK; /* NOT REACHED */ } /* * Generic routine to store a MIME content. * (audio, video, image, text, message/rfc922) */ static int store_generic (CT ct) { /* * Check if the content specifies a filename. * Don't bother with this for type "message" * (only "message/rfc822" will use store_generic). */ if (autosw && ct->c_type != CT_MESSAGE) get_storeproc (ct); return store_content (ct, NULL); } /* * Store content of type "application" */ static int store_application (CT ct) { char **ap, **ep; CI ci = &ct->c_ctinfo; /* Check if the content specifies a filename */ if (autosw) get_storeproc (ct); /* * If storeproc is not defined, and the content is type * "application/octet-stream", we also check for various * attribute/value pairs which specify if this a tar file. */ if (!ct->c_storeproc && ct->c_subtype == APPLICATION_OCTETS) { int tarP = 0, zP = 0; for (ap = ci->ci_attrs, ep = ci->ci_values; *ap; ap++, ep++) { /* check for "type=tar" attribute */ if (!strcasecmp (*ap, "type")) { if (strcasecmp (*ep, "tar")) break; tarP = 1; continue; } /* check for "conversions=compress" attribute */ if ((!strcasecmp (*ap, "conversions") || !strcasecmp (*ap, "x-conversions")) && (!strcasecmp (*ep, "compress") || !strcasecmp (*ep, "x-compress"))) { zP = 1; continue; } } if (tarP) { ct->c_showproc = add (zP ? "%euncompress | tar tvf -" : "%etar tvf -", NULL); if (!ct->c_storeproc) if (autosw) { ct->c_storeproc = add (zP ? "| uncompress | tar xvpf -" : "| tar xvpf -", NULL); ct->c_umask = 0022; } else { ct->c_storeproc = add (zP ? "%m%P.tar.Z" : "%m%P.tar", NULL); } } } return store_content (ct, NULL); } /* * Store the content of a multipart message */ static int store_multi (CT ct) { int result; struct multipart *m = (struct multipart *) ct->c_ctparams; struct part *part; result = NOTOK; for (part = m->mp_parts; part; part = part->mp_next) { CT p = part->mp_part; if (part_ok (p, 1) && type_ok (p, 1)) { result = store_switch (p); if (result == OK && ct->c_subtype == MULTI_ALTERNATE) break; } } return result; } /* * Reassemble and store the contents of a collection * of messages of type "message/partial". */ static int store_partial (CT ct) { int cur, hi, i; CT p, *ctp, *ctq; CT *base; struct partial *pm, *qm; qm = (struct partial *) ct->c_ctparams; if (qm->pm_stored) return OK; hi = i = 0; for (ctp = cts; *ctp; ctp++) { p = *ctp; if (p->c_type == CT_MESSAGE && p->c_subtype == ct->c_subtype) { pm = (struct partial *) p->c_ctparams; if (!pm->pm_stored && strcmp (qm->pm_partid, pm->pm_partid) == 0) { pm->pm_marked = pm->pm_partno; if (pm->pm_maxno) hi = pm->pm_maxno; pm->pm_stored = 1; i++; } else pm->pm_marked = 0; } } if (hi == 0) { advise (NULL, "missing (at least) last part of multipart message"); return NOTOK; } if ((base = (CT *) calloc ((size_t) (i + 1), sizeof(*base))) == NULL) adios (NULL, "out of memory"); ctq = base; for (ctp = cts; *ctp; ctp++) { p = *ctp; if (p->c_type == CT_MESSAGE && p->c_subtype == ct->c_subtype) { pm = (struct partial *) p->c_ctparams; if (pm->pm_marked) *ctq++ = p; } } *ctq = NULL; if (i > 1) qsort ((char *) base, i, sizeof(*base), (qsort_comp) ct_compar); cur = 1; for (ctq = base; *ctq; ctq++) { p = *ctq; pm = (struct partial *) p->c_ctparams; if (pm->pm_marked != cur) { if (pm->pm_marked == cur - 1) { admonish (NULL, "duplicate part %d of %d part multipart message", pm->pm_marked, hi); continue; } missing_part: advise (NULL, "missing %spart %d of %d part multipart message", cur != hi ? "(at least) " : "", cur, hi); goto losing; } else cur++; } if (hi != --cur) { cur = hi; goto missing_part; } /* * Now cycle through the sorted list of messages of type * "message/partial" and save/append them to a file. */ ctq = base; ct = *ctq++; if (store_content (ct, NULL) == NOTOK) { losing: free ((char *) base); return NOTOK; } for (; *ctq; ctq++) { p = *ctq; if (store_content (p, ct) == NOTOK) goto losing; } free ((char *) base); return OK; } /* * Store content from a message of type "message/external". */ static int store_external (CT ct) { int result = NOTOK; struct exbody *e = (struct exbody *) ct->c_ctparams; CT p = e->eb_content; if (!type_ok (p, 1)) return OK; /* * Check if the parameters for the external body * specified a filename. */ if (autosw) { char *cp; if ((cp = e->eb_name) && *cp != '/' && *cp != '.' && *cp != '|' && *cp != '!' && !strchr (cp, '%')) { if (!ct->c_storeproc) ct->c_storeproc = add (cp, NULL); if (!p->c_storeproc) p->c_storeproc = add (cp, NULL); } } /* * Since we will let the Content structure for the * external body substitute for the current content, * we temporarily change its partno (number inside * multipart), so everything looks right. */ p->c_partno = ct->c_partno; /* we probably need to check if content is really there */ result = store_switch (p); p->c_partno = NULL; return result; } /* * Compare the numbering from two different * message/partials (needed for sorting). */ static int ct_compar (CT *a, CT *b) { struct partial *am = (struct partial *) ((*a)->c_ctparams); struct partial *bm = (struct partial *) ((*b)->c_ctparams); return (am->pm_marked - bm->pm_marked); } /* * Store contents of a message or message part to * a folder, a file, the standard output, or pass * the contents to a command. * * If the current content to be saved is a followup part * to a collection of messages of type "message/partial", * then field "p" is a pointer to the Content structure * to the first message/partial in the group. */ static int store_content (CT ct, CT p) { int appending = 0, msgnum; int is_partial = 0, first_partial = 0; int last_partial = 0; char *cp, buffer[BUFSIZ]; /* * Do special processing for messages of * type "message/partial". * * We first check if this content is of type * "message/partial". If it is, then we need to check * whether it is the first and/or last in the group. * * Then if "p" is a valid pointer, it points to the Content * structure of the first partial in the group. So we copy * the file name and/or folder name from that message. In * this case, we also note that we will be appending. */ if (ct->c_type == CT_MESSAGE && ct->c_subtype == MESSAGE_PARTIAL) { struct partial *pm = (struct partial *) ct->c_ctparams; /* Yep, it's a message/partial */ is_partial = 1; /* But is it the first and/or last in the collection? */ if (pm->pm_partno == 1) first_partial = 1; if (pm->pm_maxno && pm->pm_partno == pm->pm_maxno) last_partial = 1; /* * If "p" is a valid pointer, then it points to the * Content structure for the first message in the group. * So we just copy the filename or foldername information * from the previous iteration of this function. */ if (p) { appending = 1; ct->c_storage = add (p->c_storage, NULL); /* record the folder name */ if (p->c_folder) { ct->c_folder = add (p->c_folder, NULL); } goto got_filename; } } /* * Get storage formatting string. * * 1) If we have storeproc defined, then use that * 2) Else check for a mhn-store-/ entry * 3) Else check for a mhn-store- entry * 4) Else if content is "message", use "+" (current folder) * 5) Else use string "%m%P.%s". */ if ((cp = ct->c_storeproc) == NULL || *cp == '\0') { CI ci = &ct->c_ctinfo; snprintf (buffer, sizeof(buffer), "%s-store-%s/%s", invo_name, ci->ci_type, ci->ci_subtype); if ((cp = context_find (buffer)) == NULL || *cp == '\0') { snprintf (buffer, sizeof(buffer), "%s-store-%s", invo_name, ci->ci_type); if ((cp = context_find (buffer)) == NULL || *cp == '\0') { cp = ct->c_type == CT_MESSAGE ? "+" : "%m%P.%s"; } } } /* * Check the beginning of storage formatting string * to see if we are saving content to a folder. */ if (*cp == '+' || *cp == '@') { char *tmpfilenam, *folder; /* Store content in temporary file for now */ tmpfilenam = m_scratch ("", invo_name); ct->c_storage = add (tmpfilenam, NULL); /* Get the folder name */ if (cp[1]) folder = path (cp + 1, *cp == '+' ? TFOLDER : TSUBCWF); else folder = getfolder (1); /* Check if folder exists */ if (check_folder (folder) == NOTOK) return NOTOK; /* Record the folder name */ ct->c_folder = add (folder, NULL); if (cp[1]) free (folder); goto got_filename; } /* * Parse and expand the storage formatting string * in `cp' into `buffer'. */ parse_format_string (ct, cp, buffer, sizeof(buffer), dir); /* * If formatting begins with '|' or '!', then pass * content to standard input of a command and return. */ if (buffer[0] == '|' || buffer[0] == '!') return show_content_aux (ct, 1, 0, buffer + 1, dir); /* record the filename */ ct->c_storage = add (buffer, NULL); got_filename: /* flush the output stream */ fflush (stdout); /* Now save or append the content to a file */ if (output_content_file (ct, appending) == NOTOK) return NOTOK; /* * If necessary, link the file into a folder and remove * the temporary file. If this message is a partial, * then only do this if it is the last one in the group. */ if (ct->c_folder && (!is_partial || last_partial)) { msgnum = output_content_folder (ct->c_folder, ct->c_storage); unlink (ct->c_storage); if (msgnum == NOTOK) return NOTOK; } /* * Now print out the name/number of the message * that we are storing. */ if (is_partial) { if (first_partial) fprintf (stderr, "reassembling partials "); if (last_partial) fprintf (stderr, "%s", ct->c_file); else fprintf (stderr, "%s,", ct->c_file); } else { fprintf (stderr, "storing message %s", ct->c_file); if (ct->c_partno) fprintf (stderr, " part %s", ct->c_partno); } /* * Unless we are in the "middle" of group of message/partials, * we now print the name of the file, folder, and/or message * to which we are storing the content. */ if (!is_partial || last_partial) { if (ct->c_folder) { fprintf (stderr, " to folder %s as message %d\n", ct->c_folder, msgnum); } else if (!strcmp(ct->c_storage, "-")) { fprintf (stderr, " to stdout\n"); } else { int cwdlen; cwdlen = strlen (cwd); fprintf (stderr, " as file %s\n", strncmp (ct->c_storage, cwd, cwdlen) || ct->c_storage[cwdlen] != '/' ? ct->c_storage : ct->c_storage + cwdlen + 1); } } return OK; } /* * Output content to a file */ static int output_content_file (CT ct, int appending) { int filterstate; char *file, buffer[BUFSIZ]; long pos, last; FILE *fp; /* * If the pathname is absolute, make sure * all the relevant directories exist. */ if (strchr(ct->c_storage, '/') && make_intermediates (ct->c_storage) == NOTOK) return NOTOK; if (ct->c_encoding != CE_7BIT) { int cc, fd; if (!ct->c_ceopenfnx) { advise (NULL, "don't know how to decode part %s of message %s", ct->c_partno, ct->c_file); return NOTOK; } file = appending || !strcmp (ct->c_storage, "-") ? NULL : ct->c_storage; if ((fd = (*ct->c_ceopenfnx) (ct, &file)) == NOTOK) return NOTOK; if (!strcmp (file, ct->c_storage)) { (*ct->c_ceclosefnx) (ct); fclose (ct->c_fp); ct->c_fp = NULL; return OK; } /* * Send to standard output */ if (!strcmp (ct->c_storage, "-")) { int gd; if ((gd = dup (fileno (stdout))) == NOTOK) { advise ("stdout", "unable to dup"); losing: (*ct->c_ceclosefnx) (ct); return NOTOK; } if ((fp = fdopen (gd, appending ? "a" : "w")) == NULL) { advise ("stdout", "unable to fdopen (%d, \"%s\") from", gd, appending ? "a" : "w"); close (gd); goto losing; } } else { /* * Open output file */ if ((fp = fopen (ct->c_storage, appending ? "a" : "w")) == NULL) { advise (ct->c_storage, "unable to fopen for %s", appending ? "appending" : "writing"); goto losing; } } /* * Filter the header fields of the initial enclosing * message/partial into the file. */ if (ct->c_type == CT_MESSAGE && ct->c_subtype == MESSAGE_PARTIAL) { struct partial *pm = (struct partial *) ct->c_ctparams; if (pm->pm_partno == 1) copy_some_headers (fp, ct); } for (;;) { switch (cc = read (fd, buffer, sizeof(buffer))) { case NOTOK: advise (file, "error reading content from"); break; case OK: break; default: fwrite (buffer, sizeof(*buffer), cc, fp); continue; } break; } (*ct->c_ceclosefnx) (ct); if (cc != NOTOK && fflush (fp)) advise (ct->c_storage, "error writing to"); fclose (fp); return (cc != NOTOK ? OK : NOTOK); } if (!ct->c_fp && (ct->c_fp = fopen (ct->c_file, "r")) == NULL) { advise (ct->c_file, "unable to open for reading"); return NOTOK; } pos = ct->c_begin; last = ct->c_end; fseek (ct->c_fp, pos, SEEK_SET); if (!strcmp (ct->c_storage, "-")) { int gd; if ((gd = dup (fileno (stdout))) == NOTOK) { advise ("stdout", "unable to dup"); return NOTOK; } if ((fp = fdopen (gd, appending ? "a" : "w")) == NULL) { advise ("stdout", "unable to fdopen (%d, \"%s\") from", gd, appending ? "a" : "w"); close (gd); return NOTOK; } } else { if ((fp = fopen (ct->c_storage, appending ? "a" : "w")) == NULL) { advise (ct->c_storage, "unable to fopen for %s", appending ? "appending" : "writing"); return NOTOK; } } /* * Copy a few of the header fields of the initial * enclosing message/partial into the file. */ filterstate = 0; if (ct->c_type == CT_MESSAGE && ct->c_subtype == MESSAGE_PARTIAL) { struct partial *pm = (struct partial *) ct->c_ctparams; if (pm->pm_partno == 1) { copy_some_headers (fp, ct); filterstate = 1; } } while (fgets (buffer, sizeof(buffer) - 1, ct->c_fp)) { if ((pos += strlen (buffer)) > last) { int diff; diff = strlen (buffer) - (pos - last); if (diff >= 0) buffer[diff] = '\0'; } /* * If this is the first content of a group of * message/partial contents, then we only copy a few * of the header fields of the enclosed message. */ if (filterstate) { switch (buffer[0]) { case ' ': case '\t': if (filterstate < 0) buffer[0] = 0; break; case '\n': filterstate = 0; break; default: if (!uprf (buffer, XXX_FIELD_PRF) && !uprf (buffer, VRSN_FIELD) && !uprf (buffer, "Subject:") && !uprf (buffer, "Encrypted:") && !uprf (buffer, "Message-ID:")) { filterstate = -1; buffer[0] = 0; break; } filterstate = 1; break; } } fputs (buffer, fp); if (pos >= last) break; } if (fflush (fp)) advise (ct->c_storage, "error writing to"); fclose (fp); fclose (ct->c_fp); ct->c_fp = NULL; return OK; } /* * Check if folder exists, and create * if necessary. */ static int check_folder (char *folder) { char *folderdir; struct stat st; /* expand path to the folder */ folderdir = m_mailpath (folder); /* Check if folder exists */ if (stat (folderdir, &st) == NOTOK) { int answer; char *ep; if (errno != ENOENT) { advise (folderdir, "error on folder"); return NOTOK; } ep = concat ("Create folder \"", folderdir, "\"? ", NULL); answer = getanswer (ep); free (ep); if (!answer) return NOTOK; if (!makedir (folderdir)) { advise (NULL, "unable to create folder %s", folderdir); return NOTOK; } } return OK; } /* * Add a file to a folder. * * Return the new message number of the file * when added to the folder. Return -1, if * there is an error. */ static int output_content_folder (char *folder, char *filename) { int msgnum; struct msgs *mp; /* Read the folder. */ if ((mp = folder_read (folder))) { /* Link file into folder */ msgnum = folder_addmsg (&mp, filename, 0, 0, 0); } else { advise (NULL, "unable to read folder %s", folder); return NOTOK; } /* free folder structure */ folder_free (mp); /* * Return msgnum. We are relying on the fact that * msgnum will be -1, if folder_addmsg() had an error. */ return msgnum; } /* * Parse and expand the storage formatting string * pointed to by "cp" into "buffer". */ static int parse_format_string (CT ct, char *cp, char *buffer, int buflen, char *dir) { int len; char *bp; CI ci = &ct->c_ctinfo; /* * If storage string is "-", just copy it, and * return (send content to standard output). */ if (cp[0] == '-' && cp[1] == '\0') { strncpy (buffer, cp, buflen); return 0; } bp = buffer; bp[0] = '\0'; /* * If formatting string is a pathname that doesn't * begin with '/', then preface the path with the * appropriate directory. */ if (*cp != '/' && *cp != '|' && *cp != '!') { snprintf (bp, buflen, "%s/", dir[1] ? dir : ""); len = strlen (bp); bp += len; buflen -= len; } for (; *cp; cp++) { /* We are processing a storage escape */ if (*cp == '%') { switch (*++cp) { case 'a': /* * Insert parameters from Content-Type. * This is only valid for '|' commands. */ if (buffer[0] != '|' && buffer[0] != '!') { *bp++ = *--cp; *bp = '\0'; buflen--; continue; } else { char **ap, **ep; char *s = ""; for (ap = ci->ci_attrs, ep = ci->ci_values; *ap; ap++, ep++) { snprintf (bp, buflen, "%s%s=\"%s\"", s, *ap, *ep); len = strlen (bp); bp += len; buflen -= len; s = " "; } } break; case 'm': /* insert message number */ snprintf (bp, buflen, "%s", r1bindex (ct->c_file, '/')); break; case 'P': /* insert part number with leading dot */ if (ct->c_partno) snprintf (bp, buflen, ".%s", ct->c_partno); break; case 'p': /* insert part number withouth leading dot */ if (ct->c_partno) strncpy (bp, ct->c_partno, buflen); break; case 't': /* insert content type */ strncpy (bp, ci->ci_type, buflen); break; case 's': /* insert content subtype */ strncpy (bp, ci->ci_subtype, buflen); break; case '%': /* insert the character % */ goto raw; default: *bp++ = *--cp; *bp = '\0'; buflen--; continue; } /* Advance bp and decrement buflen */ len = strlen (bp); bp += len; buflen -= len; } else { raw: *bp++ = *cp; *bp = '\0'; buflen--; } } return 0; } /* * Check if the content specifies a filename * in its MIME parameters. */ static void get_storeproc (CT ct) { char **ap, **ep, *cp; CI ci = &ct->c_ctinfo; /* * If the storeproc has already been defined, * we just return (for instance, if this content * is part of a "message/external". */ if (ct->c_storeproc) return; /* * Check the attribute/value pairs, for the attribute "name". * If found, do a few sanity checks and copy the value into * the storeproc. */ for (ap = ci->ci_attrs, ep = ci->ci_values; *ap; ap++, ep++) { if (!strcasecmp (*ap, "name") && *(cp = *ep) != '/' && *cp != '.' && *cp != '|' && *cp != '!' && !strchr (cp, '%')) { ct->c_storeproc = add (cp, NULL); return; } } } /* * Copy some of the header fields of the initial message/partial * message into the header of the reassembled message. */ static int copy_some_headers (FILE *out, CT ct) { HF hp; hp = ct->c_first_hf; /* start at first header field */ while (hp) { /* * A few of the header fields of the enclosing * messages are not copied. */ if (!uprf (hp->name, XXX_FIELD_PRF) && strcasecmp (hp->name, VRSN_FIELD) && strcasecmp (hp->name, "Subject") && strcasecmp (hp->name, "Encrypted") && strcasecmp (hp->name, "Message-ID")) fprintf (out, "%s:%s", hp->name, hp->value); hp = hp->next; /* next header field */ } return OK; }