3 * slocal.c -- asynchronously filter and deliver new mail
9 * Under sendmail, users should add the line
11 * "| /usr/local/nmh/lib/slocal"
13 * to their $HOME/.forward file.
15 * Under MMDF-I, users should (symbolically) link
16 * /usr/local/nmh/lib/slocal to $HOME/bin/rcvmail.
21 #include <h/dropsbr.h>
22 #include <h/rcvmail.h>
23 #include <h/signals.h>
24 #include <zotnet/tws/tws.h>
25 #include <zotnet/mts/mts.h>
29 #include <sys/ioctl.h>
33 #ifdef HAVE_DB1_NDBM_H
43 # define UTMP_FILE _PATH_UTMP
45 # define UTMP_FILE "/etc/utmp"
49 static struct swit switches[] = {
51 { "addr address", 0 },
57 { "sender address", 0 },
59 { "mailbox file", 0 },
61 { "home directory", -4 },
65 { "maildelivery file", 0 },
70 #define SUPPRESSDUP 10
72 #define NSUPPRESSDUP 11
73 { "nosuppressdup", 0 },
83 static int globbed = 0; /* have we built "vars" table yet? */
84 static int parsed = 0; /* have we built header field table yet */
85 static int utmped = 0; /* have we scanned umtp(x) file yet */
86 static int suppressdup = 0; /* are we suppressing duplicate messages? */
88 static int verbose = 0;
91 static char *addr = NULL;
92 static char *user = NULL;
93 static char *info = NULL;
94 static char *file = NULL;
95 static char *sender = NULL;
96 static char *envelope = NULL; /* envelope information ("From " line) */
97 static char *mbox = NULL;
98 static char *home = NULL;
100 static struct passwd *pw; /* passwd file entry */
102 static char ddate[BUFSIZ]; /* record the delivery date */
105 static jmp_buf myctx;
107 /* flags for pair->p_flags */
109 #define P_ADR 0x01 /* field is address */
110 #define P_HID 0x02 /* special (fake) field */
122 * Lookup table for matching fields and patterns
123 * in messages. The rest of the table is added
124 * when the message is parsed.
126 static struct pair hdrs[NVEC + 1] = {
127 { "source", NULL, P_HID },
128 { "addr", NULL, P_HID },
129 { "Return-Path", NULL, P_ADR },
130 { "Reply-To", NULL, P_ADR },
131 { "From", NULL, P_ADR },
132 { "Sender", NULL, P_ADR },
133 { "To", NULL, P_ADR },
134 { "cc", NULL, P_ADR },
135 { "Resent-Reply-To", NULL, P_ADR },
136 { "Resent-From", NULL, P_ADR },
137 { "Resent-Sender", NULL, P_ADR },
138 { "Resent-To", NULL, P_ADR },
139 { "Resent-cc", NULL, P_ADR },
144 * The list of builtin variables to expand in a string
145 * before it is executed by the "pipe" or "qpipe" action.
147 static struct pair vars[] = {
148 { "sender", NULL, P_NIL },
149 { "address", NULL, P_NIL },
150 { "size", NULL, P_NIL },
151 { "reply-to", NULL, P_CHK },
152 { "info", NULL, P_NIL },
156 extern char **environ;
161 static int localmail (int, char *);
162 static int usr_delivery (int, char *, int);
163 static int split (char *, char **);
164 static int parse (int);
165 static void expand (char *, char *, int);
166 static void glob (int);
167 static struct pair *lookup (struct pair *, char *);
168 static int logged_in (void);
169 static int timely (char *, char *);
170 static int usr_file (int, char *, int);
171 static int usr_pipe (int, char *, char *, char **, int);
172 static int usr_folder (int, char *);
173 static RETSIGTYPE alrmser (int);
174 static void get_sender (char *, char **);
175 static int copy_message (int, char *, int);
176 static void verbose_printf (char *fmt, ...);
177 static void adorn (char *, char *, ...);
178 static void debug_printf (char *fmt, ...);
179 static int suppress_duplicates (int, char *);
180 static char *trim (char *);
184 main (int argc, char **argv)
188 char *cp, *mdlvr = NULL, buf[BUFSIZ];
189 char mailbox[BUFSIZ], tmpfil[BUFSIZ];
190 char **argp, **arguments;
193 setlocale(LC_ALL, "");
195 invo_name = r1bindex (*argv, '/');
197 /* foil search of user profile/context */
198 if (context_foil (NULL) == -1)
201 mts_init (invo_name);
202 arguments = getarguments (invo_name, argc, argv, 0);
205 /* Parse arguments */
206 while ((cp = *argp++)) {
208 switch (smatch (++cp, switches)) {
210 ambigsw (cp, switches);
213 adios (NULL, "-%s unknown", cp);
216 snprintf (buf, sizeof(buf),
217 "%s [switches] [address info sender]", invo_name);
218 print_help (buf, switches, 0);
221 print_version(invo_name);
225 if (!(addr = *argp++))/* allow -xyz arguments */
226 adios (NULL, "missing argument to %s", argp[-2]);
229 if (!(info = *argp++))/* allow -xyz arguments */
230 adios (NULL, "missing argument to %s", argp[-2]);
233 if (!(user = *argp++))/* allow -xyz arguments */
234 adios (NULL, "missing argument to %s", argp[-2]);
237 if (!(file = *argp++) || *file == '-')
238 adios (NULL, "missing argument to %s", argp[-2]);
241 if (!(sender = *argp++))/* allow -xyz arguments */
242 adios (NULL, "missing argument to %s", argp[-2]);
245 if (!(mbox = *argp++) || *mbox == '-')
246 adios (NULL, "missing argument to %s", argp[-2]);
249 if (!(home = *argp++) || *home == '-')
250 adios (NULL, "missing argument to %s", argp[-2]);
254 if (!(cp = *argp++) || *cp == '-')
255 adios (NULL, "missing argument to %s", argp[-2]);
257 adios (NULL, "only one maildelivery file at a time!");
280 switch (argp - (argv + 1)) {
296 addr = getusername ();
298 user = (cp = strchr(addr, '.')) ? ++cp : addr;
299 if ((pw = getpwnam (user)) == NULL)
300 adios (NULL, "no such local user as %s", user);
302 if (chdir (pw->pw_dir) == -1)
306 if (geteuid() == 0) {
308 initgroups (pw->pw_name, pw->pw_gid);
315 setbuf (stdin, NULL);
317 /* Record the delivery time */
318 if ((now = dlocaltimenow ()) == NULL)
319 adios (NULL, "unable to ascertain local time");
320 snprintf (ddate, sizeof(ddate), "Delivery-Date: %s\n", dtimenow (0));
323 * Copy the message to a temporary file
328 /* getting message from file */
329 if ((tempfd = open (file, O_RDONLY)) == -1)
330 adios (file, "unable to open");
332 debug_printf ("retrieving message from file \"%s\"\n", file);
333 if ((fd = copy_message (tempfd, tmpfil, 1)) == -1)
334 adios (NULL, "unable to create temporary file");
337 /* getting message from stdin */
339 debug_printf ("retrieving message from stdin\n");
340 if ((fd = copy_message (fileno (stdin), tmpfil, 1)) == -1)
341 adios (NULL, "unable to create temporary file");
345 debug_printf ("temporary file=\"%s\"\n", tmpfil);
347 /* Delete the temp file now or a copy of every single message passed through
348 slocal will be left in the /tmp directory until deleted manually! This
349 unlink() used to be under an 'else' of the 'if (debug)' above, but since
350 some people like to always run slocal with -debug and log the results,
351 the /tmp directory would get choked over time. Of course, now that we
352 always delete the temp file, the "temporary file=" message above is
353 somewhat pointless -- someone watching debug output wouldn't have a
354 chance to 'tail -f' or 'ln' the temp file before it's unlinked. The best
355 thing would be to delay this unlink() until later if debug == 1, but I'll
356 leave that for someone who cares about the temp-file-accessing
357 functionality (they'll have to watch out for cases where we adios()). */
360 if (!(fp = fdopen (fd, "r+")))
361 adios (NULL, "unable to access temporary file");
364 * If no sender given, extract it
365 * from envelope information. */
367 get_sender (envelope, &sender);
370 snprintf (mailbox, sizeof(mailbox), "%s/%s",
371 mmdfldir[0] ? mmdfldir : pw->pw_dir,
372 mmdflfil[0] ? mmdflfil : pw->pw_name);
379 debug_printf ("addr=\"%s\"\n", trim(addr));
380 debug_printf ("user=\"%s\"\n", trim(user));
381 debug_printf ("info=\"%s\"\n", trim(info));
382 debug_printf ("sender=\"%s\"\n", trim(sender));
383 debug_printf ("envelope=\"%s\"\n", envelope ? trim(envelope) : "");
384 debug_printf ("mbox=\"%s\"\n", trim(mbox));
385 debug_printf ("home=\"%s\"\n", trim(home));
386 debug_printf ("ddate=\"%s\"\n", trim(ddate));
387 debug_printf ("now=%02d:%02d\n\n", now->tw_hour, now->tw_min);
390 /* deliver the message */
391 status = localmail (fd, mdlvr);
393 return done (status != -1 ? RCV_MOK : RCV_MBX);
398 * Main routine for delivering message.
402 localmail (int fd, char *mdlvr)
404 /* check if this message is a duplicate */
406 suppress_duplicates(fd, mdlvr ? mdlvr : ".maildelivery") == DONE)
409 /* delivery according to personal Maildelivery file */
410 if (usr_delivery (fd, mdlvr ? mdlvr : ".maildelivery", 0) != -1)
413 /* delivery according to global Maildelivery file */
414 if (usr_delivery (fd, maildelivery, 1) != -1)
418 verbose_printf ("(delivering to standard mail spool)\n");
420 /* last resort - deliver to standard mail spool */
422 return usr_file (fd, mbox, MBOX_FORMAT);
424 return usr_file (fd, mbox, MMDF_FORMAT);
429 #define matches(a,b) (stringdex (b, a) >= 0)
432 * Parse the delivery file, and process incoming message.
436 usr_delivery (int fd, char *delivery, int su)
438 int i, accept, status, won, vecp, next;
439 char *field, *pattern, *action, *result, *string;
440 char buffer[BUFSIZ], tmpbuf[BUFSIZ];
441 char *cp, *vec[NVEC];
446 /* open the delivery file */
447 if ((fp = fopen (delivery, "r")) == NULL)
450 /* check if delivery file has bad ownership or permissions */
451 if (fstat (fileno (fp), &st) == -1
452 || (st.st_uid != 0 && (su || st.st_uid != pw->pw_uid))
453 || st.st_mode & (S_IWGRP|S_IWOTH)) {
455 verbose_printf ("WARNING: %s has bad ownership/modes (su=%d,uid=%d,owner=%d,mode=0%o)\n",
456 delivery, su, (int) pw->pw_uid, (int) st.st_uid, (int) st.st_mode);
464 /* read and process delivery file */
465 while (fgets (buffer, sizeof(buffer), fp)) {
466 /* skip comments and empty lines */
467 if (*buffer == '#' || *buffer == '\n')
470 /* zap trailing newline */
471 if ((cp = strchr(buffer, '\n')))
474 /* split buffer into fields */
475 vecp = split (buffer, vec);
477 /* check for too few fields */
480 debug_printf ("WARNING: entry with only %d fields, skipping.\n", vecp);
485 for (i = 0; vec[i]; i++)
486 debug_printf ("vec[%d]: \"%s\"\n", i, trim(vec[i]));
495 /* find out how to perform the action */
500 * If previous condition failed, don't
501 * do this - else fall through
504 continue; /* else fall */
508 * If already delivered, skip this action. Else
509 * consider delivered if action is successful.
512 continue; /* else fall */
517 * Take action, and consider delivered if
518 * action is successful.
527 * Take action, but don't consider delivered, even
528 * if action is successful
535 if (!strcasecmp (vec[5], "select")) {
536 if (logged_in () != -1)
538 if (vecp > 7 && timely (vec[6], vec[7]) == -1)
543 /* check if the field matches */
551 * "default" matches only if the message hasn't
552 * been delivered yet.
554 if (!strcasecmp (field, "default")) {
561 /* parse message and build lookup table */
562 if (!parsed && parse (fd) == -1) {
567 * find header field in lookup table, and
568 * see if the pattern matches.
570 if ((p = lookup (hdrs, field)) && (p->p_value != NULL)
571 && matches (p->p_value, pattern)) {
580 /* find out the action to perform */
583 /* deliver to quoted pipe */
584 if (strcasecmp (action, "qpipe"))
585 continue; /* else fall */
587 expand (tmpbuf, string, fd);
588 if (split (tmpbuf, vec) < 1)
590 status = usr_pipe (fd, tmpbuf, vec[0], vec, 0);
594 /* deliver to pipe */
595 if (strcasecmp (action, "pipe"))
596 continue; /* else fall */
600 expand (tmpbuf, string, fd);
603 status = usr_pipe (fd, tmpbuf, "/bin/sh", vec + 2, 0);
608 if (!strcasecmp (action, "file")) {
609 status = usr_file (fd, string, MBOX_FORMAT);
612 /* deliver to nmh folder */
613 else if (strcasecmp (action, "folder"))
614 continue; /* else fall */
616 status = usr_folder (fd, string);
621 if (!strcasecmp (action, "mmdf")) {
622 status = usr_file (fd, string, MMDF_FORMAT);
626 else if (strcasecmp (action, "mbox"))
627 continue; /* else fall */
631 status = usr_file (fd, string, MBOX_FORMAT);
636 if (strcasecmp (action, "destroy"))
642 if (accept && status == 0)
647 return (won ? 0 : -1);
654 * Split buffer into fields (delimited by whitespace or
655 * comma's). Return the number of fields found.
659 split (char *cp, char **vec)
666 /* split into a maximum of NVEC fields */
667 for (i = 0; i <= NVEC;) {
670 /* zap any whitespace and comma's */
671 while (isspace (*s) || *s == ',')
674 /* end of buffer, time to leave */
678 /* get double quote text as a single field */
680 for (vec[i++] = ++s; *s && *s != '"'; s++) {
682 * Check for escaped double quote. We need
683 * to shift the string to remove slash.
691 if (*s == '"') /* zap trailing double quote */
696 if (*s == QUOTE && *++s != '"')
700 /* move forward to next field delimiter */
701 while (*s && !isspace (*s) && *s != ',')
711 * Parse the headers of a message, and build the
712 * lookup table for matching fields and patterns.
721 char name[NAMESZ], field[BUFSIZ];
728 /* get a new FILE pointer to message */
729 if ((fd1 = dup (fd)) == -1)
731 if ((in = fdopen (fd1, "r")) == NULL) {
737 /* add special entries to lookup table */
738 if ((p = lookup (hdrs, "source")))
739 p->p_value = getcpy (sender);
740 if ((p = lookup (hdrs, "addr")))
741 p->p_value = getcpy (addr);
744 * Scan the headers of the message and build
747 for (i = 0, state = FLD;;) {
748 switch (state = m_getfld (state, name, field, sizeof(field), in)) {
752 lp = add (field, NULL);
753 while (state == FLDPLUS) {
754 state = m_getfld (state, name, field, sizeof(field), in);
755 lp = add (field, lp);
757 for (p = hdrs; p->p_name; p++) {
758 if (!strcasecmp (p->p_name, name)) {
759 if (!(p->p_flags & P_HID)) {
760 if ((cp = p->p_value)) {
761 if (p->p_flags & P_ADR) {
762 dp = cp + strlen (cp) - 1;
765 cp = add (",\n\t", cp);
770 p->p_value = add (lp, cp);
776 if (p->p_name == NULL && i < NVEC) {
777 p->p_name = getcpy (name);
794 advise (NULL, "format error in message");
798 advise (NULL, "internal error in m_getfld");
806 if ((p = lookup (vars, "reply-to"))) {
807 if ((q = lookup (hdrs, "reply-to")) == NULL || q->p_value == NULL)
808 q = lookup (hdrs, "from");
809 p->p_value = getcpy (q ? q->p_value : "");
810 p->p_flags &= ~P_CHK;
812 debug_printf ("vars[%d]: name=\"%s\" value=\"%s\"\n",
813 p - vars, p->p_name, trim(p->p_value));
816 for (p = hdrs; p->p_name; p++)
817 debug_printf ("hdrs[%d]: name=\"%s\" value=\"%s\"\n",
818 p - hdrs, p->p_name, p->p_value ? trim(p->p_value) : "");
829 * Expand any builtin variables such as $(sender),
830 * $(address), etc., in a string.
834 expand (char *s1, char *s2, int fd)
842 while ((c = *s2++)) {
843 if (c != '$' || *s2 != LPAREN) {
846 for (cp = ++s2; *s2 && *s2 != RPAREN; s2++)
853 if ((p = lookup (vars, cp))) {
854 if (!parsed && (p->p_flags & P_CHK))
857 strcpy (s1, p->p_value);
867 * Fill in the information missing from the "vars"
868 * table, which is necessary to expand any builtin
869 * variables in the string for a "pipe" or "qpipe"
883 if ((p = lookup (vars, "sender")))
884 p->p_value = getcpy (sender);
885 if ((p = lookup (vars, "address")))
886 p->p_value = getcpy (addr);
887 if ((p = lookup (vars, "size"))) {
888 snprintf (buffer, sizeof(buffer), "%d",
889 fstat (fd, &st) != -1 ? (int) st.st_size : 0);
890 p->p_value = getcpy (buffer);
892 if ((p = lookup (vars, "info")))
893 p->p_value = getcpy (info);
896 for (p = vars; p->p_name; p++)
897 debug_printf ("vars[%d]: name=\"%s\" value=\"%s\"\n",
898 p - vars, p->p_name, trim(p->p_value));
904 * Find a matching name in a lookup table. If found,
905 * return the "pairs" entry, else return NULL.
909 lookup (struct pair *pairs, char *key)
911 for (; pairs->p_name; pairs++)
912 if (!strcasecmp (pairs->p_name, key))
920 * Check utmp(x) file to see if user is currently
933 if ((uf = fopen (UTMP_FILE, "r")) == NULL)
936 while (fread ((char *) &ut, sizeof(ut), 1, uf) == 1) {
937 if (ut.ut_name[0] != 0
938 && strncmp (user, ut.ut_name, sizeof(ut.ut_name)) == 0) {
942 return (utmped = DONE);
947 return (utmped = NOTOK);
951 #define check(t,a,b) if (t < a || t > b) return -1
952 #define cmpar(h1,m1,h2,m2) if (h1 < h2 || (h1 == h2 && m1 < m2)) return 0
955 timely (char *t1, char *t2)
957 int t1hours, t1mins, t2hours, t2mins;
959 if (sscanf (t1, "%d:%d", &t1hours, &t1mins) != 2)
961 check (t1hours, 0, 23);
962 check (t1mins, 0, 59);
964 if (sscanf (t2, "%d:%d", &t2hours, &t2mins) != 2)
966 check (t2hours, 0, 23);
967 check (t2mins, 0, 59);
969 cmpar (now->tw_hour, now->tw_min, t1hours, t1mins);
970 cmpar (t2hours, t2mins, now->tw_hour, now->tw_min);
977 * Deliver message by appending to a file.
981 usr_file (int fd, char *mailbox, int mbx_style)
986 verbose_printf ("delivering to file \"%s\"", mailbox);
988 if (mbx_style == MBOX_FORMAT) {
990 verbose_printf (" (mbox style)");
994 verbose_printf (" (mmdf style)");
998 /* open and lock the file */
999 if ((md = mbx_open (mailbox, mbx_style, pw->pw_uid, pw->pw_gid, m_gmprot())) == -1) {
1001 adorn ("", "unable to open:");
1005 lseek (fd, (off_t) 0, SEEK_SET);
1007 /* append message to file */
1008 if (mbx_copy (mailbox, mbx_style, md, fd, mapping, NULL, verbose) == -1) {
1010 adorn ("", "error writing to:");
1014 /* close and unlock file */
1015 mbx_close (mailbox, md);
1018 verbose_printf (", success.\n");
1024 * Deliver message to a nmh folder.
1028 usr_folder (int fd, char *string)
1031 char folder[BUFSIZ], *vec[3];
1033 /* get folder name ready */
1035 strncpy(folder, string, sizeof(folder));
1037 snprintf(folder, sizeof(folder), "+%s", string);
1040 verbose_printf ("delivering to folder \"%s\"", folder + 1);
1042 vec[0] = "rcvstore";
1046 /* use rcvstore to put message in folder */
1047 status = usr_pipe (fd, "rcvstore", rcvstoreproc, vec, 1);
1051 * Currently, verbose status messages are handled by usr_pipe().
1055 verbose_printf (", success.\n");
1057 verbose_printf (", failed.\n");
1065 * Deliver message to a process.
1069 usr_pipe (int fd, char *cmd, char *pgm, char **vec, int suppress)
1072 int i, bytes, seconds, status;
1075 if (verbose && !suppress)
1076 verbose_printf ("delivering to pipe \"%s\"", cmd);
1078 lseek (fd, (off_t) 0, SEEK_SET);
1080 for (i = 0; (child_id = fork()) == -1 && i < 5; i++)
1087 adorn ("fork", "unable to");
1094 freopen ("/dev/null", "w", stdout);
1095 freopen ("/dev/null", "w", stderr);
1101 if ((fd = open ("/dev/tty", O_RDWR)) != -1) {
1102 ioctl (fd, TIOCNOTTY, NULL);
1105 #endif /* TIOCNOTTY */
1107 setpgid ((pid_t) 0, getpid ()); /* put in own process group */
1110 m_putenv ("USER", pw->pw_name);
1111 m_putenv ("HOME", pw->pw_dir);
1112 m_putenv ("SHELL", pw->pw_shell);
1118 /* parent process */
1119 if (!setjmp (myctx)) {
1120 SIGNAL (SIGALRM, alrmser);
1121 bytes = fstat (fd, &st) != -1 ? (int) st.st_size : 100;
1123 /* amount of time to wait depends on message size */
1125 /* give at least 5 minutes */
1127 } else if (bytes >= 90000) {
1128 /* a half hour is long enough */
1131 seconds = (bytes / 60) + 300;
1133 alarm ((unsigned int) seconds);
1134 status = pidwait (child_id, 0);
1138 if (status == RP_MOK || status == RP_OK)
1143 verbose_printf (", success.\n");
1145 if ((status & 0xff00) == 0xff00)
1146 verbose_printf (", system error\n");
1148 pidstatus (status, stdout, ", failed");
1150 return (status == 0 ? 0 : -1);
1153 * Ruthlessly kill the child and anything
1154 * else in its process group.
1156 KILLPG(child_id, SIGKILL);
1158 verbose_printf (", timed-out; terminated\n");
1168 #ifndef RELIABLE_SIGNALS
1169 SIGNAL (SIGALRM, alrmser);
1172 longjmp (myctx, DONE);
1177 * Get the `sender' from the envelope
1178 * information ("From " line).
1182 get_sender (char *envelope, char **sender)
1186 char buffer[BUFSIZ];
1188 if (envelope == NULL) {
1189 *sender = getcpy ("");
1193 i = strlen ("From ");
1194 strncpy (buffer, envelope + i, sizeof(buffer));
1195 if ((cp = strchr(buffer, '\n'))) {
1205 for (cp = buffer + strlen (buffer) - 1; cp >= buffer; cp--)
1210 *sender = getcpy (buffer);
1215 * Copy message into a temporary file.
1216 * While copying, it will do some header processing
1217 * including the extraction of the envelope information.
1221 copy_message (int qd, char *tmpfil, int fold)
1223 int i, first = 1, fd1, fd2;
1224 char buffer[BUFSIZ];
1227 strcpy (tmpfil, m_tmpfil (invo_name));
1229 /* open temporary file to put message in */
1230 if ((fd1 = open (tmpfil, O_RDWR | O_CREAT | O_TRUNC, 0600)) == -1)
1234 while ((i = read (qd, buffer, sizeof(buffer))) > 0)
1235 if (write (fd1, buffer, i) != i) {
1243 lseek (fd1, (off_t) 0, SEEK_SET);
1247 /* dup the fd for incoming message */
1248 if ((fd2 = dup (qd)) == -1) {
1253 /* now create a FILE pointer for it */
1254 if ((qfp = fdopen (fd2, "r")) == NULL) {
1260 /* dup the fd for temporary file */
1261 if ((fd2 = dup (fd1)) == -1) {
1267 /* now create a FILE pointer for it */
1268 if ((ffp = fdopen (fd2, "r+")) == NULL) {
1276 * copy message into temporary file
1277 * and massage the headers. Save
1278 * a copy of the "From " line for later.
1280 i = strlen ("From ");
1281 while (fgets (buffer, sizeof(buffer), qfp)) {
1284 if (!strncmp (buffer, "From ", i)) {
1286 char *fp, *cp, *hp, *ep;
1288 /* get copy of envelope information ("From " line) */
1289 envelope = getcpy (buffer);
1292 /* First go ahead and put "From " line in message */
1293 fputs (buffer, ffp);
1300 * Now create a "Return-Path:" line
1301 * from the "From " line.
1303 hp = cp = strchr(fp = envelope + i, ' ');
1304 while ((hp = strchr(++hp, 'r')))
1305 if (uprf (hp, "remote from")) {
1306 hp = strrchr(hp, ' ');
1310 /* return path for UUCP style addressing */
1311 ep = strchr(++hp, '\n');
1312 snprintf (buffer, sizeof(buffer), "Return-Path: %.*s!%.*s\n",
1313 ep - hp, hp, cp - fp, fp);
1315 /* return path for standard domain addressing */
1316 snprintf (buffer, sizeof(buffer), "Return-Path: %.*s\n",
1320 /* Add Return-Path header to message */
1321 fputs (buffer, ffp);
1325 /* Put the delivery date in message */
1334 fputs (buffer, ffp);
1346 lseek (fd1, (off_t) 0, SEEK_SET);
1358 * Trim strings for pretty printing of debugging output
1364 char buffer[BUFSIZ*4];
1370 /* copy string into temp buffer */
1371 strncpy (buffer, cp, sizeof(buffer));
1374 /* skip over leading whitespace */
1375 while (isspace(*bp))
1378 /* start at the end and zap trailing whitespace */
1379 for (sp = bp + strlen(bp) - 1; sp >= bp; sp--) {
1386 /* replace remaining whitespace with spaces */
1387 for (sp = bp; *sp; sp++)
1391 /* now return a copy */
1396 * Function for printing `verbose' messages.
1400 verbose_printf (char *fmt, ...)
1405 vfprintf (stdout, fmt, ap);
1408 fflush (stdout); /* now flush output */
1413 * Function for printing `verbose' delivery
1418 adorn (char *what, char *fmt, ...)
1424 eindex = errno; /* save the errno */
1425 fprintf (stdout, ", ");
1428 vfprintf (stdout, fmt, ap);
1433 fprintf (stdout, " %s: ", what);
1434 if ((s = strerror (eindex)))
1435 fprintf (stdout, "%s", s);
1437 fprintf (stdout, "Error %d", eindex);
1440 fputc ('\n', stdout);
1446 * Function for printing `debug' messages.
1450 debug_printf (char *fmt, ...)
1455 vfprintf (stderr, fmt, ap);
1461 * Check ndbm/db file(s) to see if the Message-Id of this
1462 * message matches the Message-Id of a previous message,
1463 * so we can discard it. If it doesn't match, we add the
1464 * Message-Id of this message to the ndbm/db file.
1467 suppress_duplicates (int fd, char *file)
1469 int fd1, lockfd, state, result;
1470 char *cp, buf[BUFSIZ], name[NAMESZ];
1475 if ((fd1 = dup (fd)) == -1)
1477 if (!(in = fdopen (fd1, "r"))) {
1483 for (state = FLD;;) {
1484 state = m_getfld (state, name, buf, sizeof(buf), in);
1489 /* Search for the message ID */
1490 if (strcasecmp (name, "Message-ID")) {
1491 while (state == FLDPLUS)
1492 state = m_getfld (state, name, buf, sizeof(buf), in);
1496 cp = add (buf, NULL);
1497 while (state == FLDPLUS) {
1498 state = m_getfld (state, name, buf, sizeof(buf), in);
1501 key.dptr = trimcpy (cp);
1502 key.dsize = strlen (key.dptr) + 1;
1506 if (!(db = dbm_open (file, O_RDWR | O_CREAT, 0600))) {
1507 advise (file, "unable to perform dbm_open on");
1513 * Since it is difficult to portable lock a ndbm file,
1514 * we will open and lock the Maildelivery file instead.
1515 * This will fail if your Maildelivery file doesn't
1518 if ((lockfd = lkopen(file, O_RDWR, 0)) == -1) {
1519 advise (file, "unable to perform file locking on");
1524 value = dbm_fetch (db, key);
1527 verbose_printf ("Message-ID: %s\n already received on %s",
1531 value.dptr = ddate + sizeof("Delivery-Date:");
1532 value.dsize = strlen(value.dptr) + 1;
1533 if (dbm_store (db, key, value, DBM_INSERT))
1534 advise (file, "possibly corrupt file");
1539 lkclose(lockfd, file);