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>
32 #include <grp.h> /* initgroups() is here on Solaris 2.6 */
33 #include <unistd.h> /* initgroups() is here on HP-UX 10.20 */
35 /* On AIX 4.1, initgroups() is defined and even documented (giving the parameter
36 types as "char*" and "int"), but doesn't have a prototype in any of the
37 system header files. On other OSes, this should be a duplicate prototype
38 that won't cause any errors or warnings. */
39 extern int initgroups(const char*, gid_t);
41 #ifdef HAVE_DB1_NDBM_H
51 # define UTMP_FILE _PATH_UTMP
53 # define UTMP_FILE "/etc/utmp"
57 static struct swit switches[] = {
59 { "addr address", 0 },
65 { "sender address", 0 },
67 { "mailbox file", 0 },
69 { "home directory", -4 },
73 { "maildelivery file", 0 },
78 #define SUPPRESSDUP 10
80 #define NSUPPRESSDUP 11
81 { "nosuppressdup", 0 },
91 static int globbed = 0; /* have we built "vars" table yet? */
92 static int parsed = 0; /* have we built header field table yet */
93 static int utmped = 0; /* have we scanned umtp(x) file yet */
94 static int suppressdup = 0; /* are we suppressing duplicate messages? */
96 static int verbose = 0;
99 static char *addr = NULL;
100 static char *user = NULL;
101 static char *info = NULL;
102 static char *file = NULL;
103 static char *sender = NULL;
104 static char *envelope = NULL; /* envelope information ("From " line) */
105 static char *mbox = NULL;
106 static char *home = NULL;
108 static struct passwd *pw; /* passwd file entry */
110 static char ddate[BUFSIZ]; /* record the delivery date */
113 static jmp_buf myctx;
115 /* flags for pair->p_flags */
117 #define P_ADR 0x01 /* field is address */
118 #define P_HID 0x02 /* special (fake) field */
130 * Lookup table for matching fields and patterns
131 * in messages. The rest of the table is added
132 * when the message is parsed.
134 static struct pair hdrs[NVEC + 1] = {
135 { "source", NULL, P_HID },
136 { "addr", NULL, P_HID },
137 { "Return-Path", NULL, P_ADR },
138 { "Reply-To", NULL, P_ADR },
139 { "From", NULL, P_ADR },
140 { "Sender", NULL, P_ADR },
141 { "To", NULL, P_ADR },
142 { "cc", NULL, P_ADR },
143 { "Resent-Reply-To", NULL, P_ADR },
144 { "Resent-From", NULL, P_ADR },
145 { "Resent-Sender", NULL, P_ADR },
146 { "Resent-To", NULL, P_ADR },
147 { "Resent-cc", NULL, P_ADR },
152 * The list of builtin variables to expand in a string
153 * before it is executed by the "pipe" or "qpipe" action.
155 static struct pair vars[] = {
156 { "sender", NULL, P_NIL },
157 { "address", NULL, P_NIL },
158 { "size", NULL, P_NIL },
159 { "reply-to", NULL, P_CHK },
160 { "info", NULL, P_NIL },
164 extern char **environ;
169 static int localmail (int, char *);
170 static int usr_delivery (int, char *, int);
171 static int split (char *, char **);
172 static int parse (int);
173 static void expand (char *, char *, int);
174 static void glob (int);
175 static struct pair *lookup (struct pair *, char *);
176 static int logged_in (void);
177 static int timely (char *, char *);
178 static int usr_file (int, char *, int);
179 static int usr_pipe (int, char *, char *, char **, int);
180 static int usr_folder (int, char *);
181 static RETSIGTYPE alrmser (int);
182 static void get_sender (char *, char **);
183 static int copy_message (int, char *, int);
184 static void verbose_printf (char *fmt, ...);
185 static void adorn (char *, char *, ...);
186 static void debug_printf (char *fmt, ...);
187 static int suppress_duplicates (int, char *);
188 static char *trim (char *);
192 main (int argc, char **argv)
196 char *cp, *mdlvr = NULL, buf[BUFSIZ];
197 char mailbox[BUFSIZ], tmpfil[BUFSIZ];
198 char **argp, **arguments;
201 setlocale(LC_ALL, "");
203 invo_name = r1bindex (*argv, '/');
205 /* foil search of user profile/context */
206 if (context_foil (NULL) == -1)
209 mts_init (invo_name);
210 arguments = getarguments (invo_name, argc, argv, 0);
213 /* Parse arguments */
214 while ((cp = *argp++)) {
216 switch (smatch (++cp, switches)) {
218 ambigsw (cp, switches);
221 adios (NULL, "-%s unknown", cp);
224 snprintf (buf, sizeof(buf),
225 "%s [switches] [address info sender]", invo_name);
226 print_help (buf, switches, 0);
229 print_version(invo_name);
233 if (!(addr = *argp++))/* allow -xyz arguments */
234 adios (NULL, "missing argument to %s", argp[-2]);
237 if (!(info = *argp++))/* allow -xyz arguments */
238 adios (NULL, "missing argument to %s", argp[-2]);
241 if (!(user = *argp++))/* allow -xyz arguments */
242 adios (NULL, "missing argument to %s", argp[-2]);
245 if (!(file = *argp++) || *file == '-')
246 adios (NULL, "missing argument to %s", argp[-2]);
249 if (!(sender = *argp++))/* allow -xyz arguments */
250 adios (NULL, "missing argument to %s", argp[-2]);
253 if (!(mbox = *argp++) || *mbox == '-')
254 adios (NULL, "missing argument to %s", argp[-2]);
257 if (!(home = *argp++) || *home == '-')
258 adios (NULL, "missing argument to %s", argp[-2]);
262 if (!(cp = *argp++) || *cp == '-')
263 adios (NULL, "missing argument to %s", argp[-2]);
265 adios (NULL, "only one maildelivery file at a time!");
288 switch (argp - (argv + 1)) {
304 addr = getusername ();
306 user = (cp = strchr(addr, '.')) ? ++cp : addr;
307 if ((pw = getpwnam (user)) == NULL)
308 adios (NULL, "no such local user as %s", user);
310 if (chdir (pw->pw_dir) == -1)
314 if (geteuid() == 0) {
316 initgroups (pw->pw_name, pw->pw_gid);
323 setbuf (stdin, NULL);
325 /* Record the delivery time */
326 if ((now = dlocaltimenow ()) == NULL)
327 adios (NULL, "unable to ascertain local time");
328 snprintf (ddate, sizeof(ddate), "Delivery-Date: %s\n", dtimenow (0));
331 * Copy the message to a temporary file
336 /* getting message from file */
337 if ((tempfd = open (file, O_RDONLY)) == -1)
338 adios (file, "unable to open");
340 debug_printf ("retrieving message from file \"%s\"\n", file);
341 if ((fd = copy_message (tempfd, tmpfil, 1)) == -1)
342 adios (NULL, "unable to create temporary file");
345 /* getting message from stdin */
347 debug_printf ("retrieving message from stdin\n");
348 if ((fd = copy_message (fileno (stdin), tmpfil, 1)) == -1)
349 adios (NULL, "unable to create temporary file");
353 debug_printf ("temporary file=\"%s\"\n", tmpfil);
355 /* Delete the temp file now or a copy of every single message passed through
356 slocal will be left in the /tmp directory until deleted manually! This
357 unlink() used to be under an 'else' of the 'if (debug)' above, but since
358 some people like to always run slocal with -debug and log the results,
359 the /tmp directory would get choked over time. Of course, now that we
360 always delete the temp file, the "temporary file=" message above is
361 somewhat pointless -- someone watching debug output wouldn't have a
362 chance to 'tail -f' or 'ln' the temp file before it's unlinked. The best
363 thing would be to delay this unlink() until later if debug == 1, but I'll
364 leave that for someone who cares about the temp-file-accessing
365 functionality (they'll have to watch out for cases where we adios()). */
368 if (!(fp = fdopen (fd, "r+")))
369 adios (NULL, "unable to access temporary file");
372 * If no sender given, extract it
373 * from envelope information. */
375 get_sender (envelope, &sender);
378 snprintf (mailbox, sizeof(mailbox), "%s/%s",
379 mmdfldir[0] ? mmdfldir : pw->pw_dir,
380 mmdflfil[0] ? mmdflfil : pw->pw_name);
387 debug_printf ("addr=\"%s\"\n", trim(addr));
388 debug_printf ("user=\"%s\"\n", trim(user));
389 debug_printf ("info=\"%s\"\n", trim(info));
390 debug_printf ("sender=\"%s\"\n", trim(sender));
391 debug_printf ("envelope=\"%s\"\n", envelope ? trim(envelope) : "");
392 debug_printf ("mbox=\"%s\"\n", trim(mbox));
393 debug_printf ("home=\"%s\"\n", trim(home));
394 debug_printf ("ddate=\"%s\"\n", trim(ddate));
395 debug_printf ("now=%02d:%02d\n\n", now->tw_hour, now->tw_min);
398 /* deliver the message */
399 status = localmail (fd, mdlvr);
401 return done (status != -1 ? RCV_MOK : RCV_MBX);
406 * Main routine for delivering message.
410 localmail (int fd, char *mdlvr)
412 /* check if this message is a duplicate */
414 suppress_duplicates(fd, mdlvr ? mdlvr : ".maildelivery") == DONE)
417 /* delivery according to personal Maildelivery file */
418 if (usr_delivery (fd, mdlvr ? mdlvr : ".maildelivery", 0) != -1)
421 /* delivery according to global Maildelivery file */
422 if (usr_delivery (fd, maildelivery, 1) != -1)
426 verbose_printf ("(delivering to standard mail spool)\n");
428 /* last resort - deliver to standard mail spool */
430 return usr_file (fd, mbox, MBOX_FORMAT);
432 return usr_file (fd, mbox, MMDF_FORMAT);
437 #define matches(a,b) (stringdex (b, a) >= 0)
440 * Parse the delivery file, and process incoming message.
444 usr_delivery (int fd, char *delivery, int su)
446 int i, accept, status, won, vecp, next;
447 char *field, *pattern, *action, *result, *string;
448 char buffer[BUFSIZ], tmpbuf[BUFSIZ];
449 char *cp, *vec[NVEC];
454 /* open the delivery file */
455 if ((fp = fopen (delivery, "r")) == NULL)
458 /* check if delivery file has bad ownership or permissions */
459 if (fstat (fileno (fp), &st) == -1
460 || (st.st_uid != 0 && (su || st.st_uid != pw->pw_uid))
461 || st.st_mode & (S_IWGRP|S_IWOTH)) {
463 verbose_printf ("WARNING: %s has bad ownership/modes (su=%d,uid=%d,owner=%d,mode=0%o)\n",
464 delivery, su, (int) pw->pw_uid, (int) st.st_uid, (int) st.st_mode);
472 /* read and process delivery file */
473 while (fgets (buffer, sizeof(buffer), fp)) {
474 /* skip comments and empty lines */
475 if (*buffer == '#' || *buffer == '\n')
478 /* zap trailing newline */
479 if ((cp = strchr(buffer, '\n')))
482 /* split buffer into fields */
483 vecp = split (buffer, vec);
485 /* check for too few fields */
488 debug_printf ("WARNING: entry with only %d fields, skipping.\n", vecp);
493 for (i = 0; vec[i]; i++)
494 debug_printf ("vec[%d]: \"%s\"\n", i, trim(vec[i]));
503 /* find out how to perform the action */
508 * If previous condition failed, don't
509 * do this - else fall through
512 continue; /* else fall */
516 * If already delivered, skip this action. Else
517 * consider delivered if action is successful.
520 continue; /* else fall */
525 * Take action, and consider delivered if
526 * action is successful.
535 * Take action, but don't consider delivered, even
536 * if action is successful
543 if (!strcasecmp (vec[5], "select")) {
544 if (logged_in () != -1)
546 if (vecp > 7 && timely (vec[6], vec[7]) == -1)
551 /* check if the field matches */
559 * "default" matches only if the message hasn't
560 * been delivered yet.
562 if (!strcasecmp (field, "default")) {
569 /* parse message and build lookup table */
570 if (!parsed && parse (fd) == -1) {
575 * find header field in lookup table, and
576 * see if the pattern matches.
578 if ((p = lookup (hdrs, field)) && (p->p_value != NULL)
579 && matches (p->p_value, pattern)) {
588 /* find out the action to perform */
591 /* deliver to quoted pipe */
592 if (strcasecmp (action, "qpipe"))
593 continue; /* else fall */
595 expand (tmpbuf, string, fd);
596 if (split (tmpbuf, vec) < 1)
598 status = usr_pipe (fd, tmpbuf, vec[0], vec, 0);
602 /* deliver to pipe */
603 if (strcasecmp (action, "pipe"))
604 continue; /* else fall */
608 expand (tmpbuf, string, fd);
611 status = usr_pipe (fd, tmpbuf, "/bin/sh", vec + 2, 0);
616 if (!strcasecmp (action, "file")) {
617 status = usr_file (fd, string, MBOX_FORMAT);
620 /* deliver to nmh folder */
621 else if (strcasecmp (action, "folder"))
622 continue; /* else fall */
624 status = usr_folder (fd, string);
629 if (!strcasecmp (action, "mmdf")) {
630 status = usr_file (fd, string, MMDF_FORMAT);
634 else if (strcasecmp (action, "mbox"))
635 continue; /* else fall */
639 status = usr_file (fd, string, MBOX_FORMAT);
644 if (strcasecmp (action, "destroy"))
650 if (accept && status == 0)
655 return (won ? 0 : -1);
662 * Split buffer into fields (delimited by whitespace or
663 * comma's). Return the number of fields found.
667 split (char *cp, char **vec)
674 /* split into a maximum of NVEC fields */
675 for (i = 0; i <= NVEC;) {
678 /* zap any whitespace and comma's */
679 while (isspace (*s) || *s == ',')
682 /* end of buffer, time to leave */
686 /* get double quote text as a single field */
688 for (vec[i++] = ++s; *s && *s != '"'; s++) {
690 * Check for escaped double quote. We need
691 * to shift the string to remove slash.
699 if (*s == '"') /* zap trailing double quote */
704 if (*s == QUOTE && *++s != '"')
708 /* move forward to next field delimiter */
709 while (*s && !isspace (*s) && *s != ',')
719 * Parse the headers of a message, and build the
720 * lookup table for matching fields and patterns.
729 char name[NAMESZ], field[BUFSIZ];
736 /* get a new FILE pointer to message */
737 if ((fd1 = dup (fd)) == -1)
739 if ((in = fdopen (fd1, "r")) == NULL) {
745 /* add special entries to lookup table */
746 if ((p = lookup (hdrs, "source")))
747 p->p_value = getcpy (sender);
748 if ((p = lookup (hdrs, "addr")))
749 p->p_value = getcpy (addr);
752 * Scan the headers of the message and build
755 for (i = 0, state = FLD;;) {
756 switch (state = m_getfld (state, name, field, sizeof(field), in)) {
760 lp = add (field, NULL);
761 while (state == FLDPLUS) {
762 state = m_getfld (state, name, field, sizeof(field), in);
763 lp = add (field, lp);
765 for (p = hdrs; p->p_name; p++) {
766 if (!strcasecmp (p->p_name, name)) {
767 if (!(p->p_flags & P_HID)) {
768 if ((cp = p->p_value)) {
769 if (p->p_flags & P_ADR) {
770 dp = cp + strlen (cp) - 1;
773 cp = add (",\n\t", cp);
778 p->p_value = add (lp, cp);
784 if (p->p_name == NULL && i < NVEC) {
785 p->p_name = getcpy (name);
802 advise (NULL, "format error in message");
806 advise (NULL, "internal error in m_getfld");
814 if ((p = lookup (vars, "reply-to"))) {
815 if ((q = lookup (hdrs, "reply-to")) == NULL || q->p_value == NULL)
816 q = lookup (hdrs, "from");
817 p->p_value = getcpy (q ? q->p_value : "");
818 p->p_flags &= ~P_CHK;
820 debug_printf ("vars[%d]: name=\"%s\" value=\"%s\"\n",
821 p - vars, p->p_name, trim(p->p_value));
824 for (p = hdrs; p->p_name; p++)
825 debug_printf ("hdrs[%d]: name=\"%s\" value=\"%s\"\n",
826 p - hdrs, p->p_name, p->p_value ? trim(p->p_value) : "");
837 * Expand any builtin variables such as $(sender),
838 * $(address), etc., in a string.
842 expand (char *s1, char *s2, int fd)
850 while ((c = *s2++)) {
851 if (c != '$' || *s2 != LPAREN) {
854 for (cp = ++s2; *s2 && *s2 != RPAREN; s2++)
861 if ((p = lookup (vars, cp))) {
862 if (!parsed && (p->p_flags & P_CHK))
865 strcpy (s1, p->p_value);
875 * Fill in the information missing from the "vars"
876 * table, which is necessary to expand any builtin
877 * variables in the string for a "pipe" or "qpipe"
891 if ((p = lookup (vars, "sender")))
892 p->p_value = getcpy (sender);
893 if ((p = lookup (vars, "address")))
894 p->p_value = getcpy (addr);
895 if ((p = lookup (vars, "size"))) {
896 snprintf (buffer, sizeof(buffer), "%d",
897 fstat (fd, &st) != -1 ? (int) st.st_size : 0);
898 p->p_value = getcpy (buffer);
900 if ((p = lookup (vars, "info")))
901 p->p_value = getcpy (info);
904 for (p = vars; p->p_name; p++)
905 debug_printf ("vars[%d]: name=\"%s\" value=\"%s\"\n",
906 p - vars, p->p_name, trim(p->p_value));
912 * Find a matching name in a lookup table. If found,
913 * return the "pairs" entry, else return NULL.
917 lookup (struct pair *pairs, char *key)
919 for (; pairs->p_name; pairs++)
920 if (!strcasecmp (pairs->p_name, key))
928 * Check utmp(x) file to see if user is currently
941 if ((uf = fopen (UTMP_FILE, "r")) == NULL)
944 while (fread ((char *) &ut, sizeof(ut), 1, uf) == 1) {
945 if (ut.ut_name[0] != 0
946 && strncmp (user, ut.ut_name, sizeof(ut.ut_name)) == 0) {
950 return (utmped = DONE);
955 return (utmped = NOTOK);
959 #define check(t,a,b) if (t < a || t > b) return -1
960 #define cmpar(h1,m1,h2,m2) if (h1 < h2 || (h1 == h2 && m1 < m2)) return 0
963 timely (char *t1, char *t2)
965 int t1hours, t1mins, t2hours, t2mins;
967 if (sscanf (t1, "%d:%d", &t1hours, &t1mins) != 2)
969 check (t1hours, 0, 23);
970 check (t1mins, 0, 59);
972 if (sscanf (t2, "%d:%d", &t2hours, &t2mins) != 2)
974 check (t2hours, 0, 23);
975 check (t2mins, 0, 59);
977 cmpar (now->tw_hour, now->tw_min, t1hours, t1mins);
978 cmpar (t2hours, t2mins, now->tw_hour, now->tw_min);
985 * Deliver message by appending to a file.
989 usr_file (int fd, char *mailbox, int mbx_style)
994 verbose_printf ("delivering to file \"%s\"", mailbox);
996 if (mbx_style == MBOX_FORMAT) {
998 verbose_printf (" (mbox style)");
1002 verbose_printf (" (mmdf style)");
1006 /* open and lock the file */
1007 if ((md = mbx_open (mailbox, mbx_style, pw->pw_uid, pw->pw_gid, m_gmprot())) == -1) {
1009 adorn ("", "unable to open:");
1013 lseek (fd, (off_t) 0, SEEK_SET);
1015 /* append message to file */
1016 if (mbx_copy (mailbox, mbx_style, md, fd, mapping, NULL, verbose) == -1) {
1018 adorn ("", "error writing to:");
1022 /* close and unlock file */
1023 mbx_close (mailbox, md);
1026 verbose_printf (", success.\n");
1032 * Deliver message to a nmh folder.
1036 usr_folder (int fd, char *string)
1039 char folder[BUFSIZ], *vec[3];
1041 /* get folder name ready */
1043 strncpy(folder, string, sizeof(folder));
1045 snprintf(folder, sizeof(folder), "+%s", string);
1048 verbose_printf ("delivering to folder \"%s\"", folder + 1);
1050 vec[0] = "rcvstore";
1054 /* use rcvstore to put message in folder */
1055 status = usr_pipe (fd, "rcvstore", rcvstoreproc, vec, 1);
1059 * Currently, verbose status messages are handled by usr_pipe().
1063 verbose_printf (", success.\n");
1065 verbose_printf (", failed.\n");
1073 * Deliver message to a process.
1077 usr_pipe (int fd, char *cmd, char *pgm, char **vec, int suppress)
1080 int i, bytes, seconds, status;
1083 if (verbose && !suppress)
1084 verbose_printf ("delivering to pipe \"%s\"", cmd);
1086 lseek (fd, (off_t) 0, SEEK_SET);
1088 for (i = 0; (child_id = fork()) == -1 && i < 5; i++)
1095 adorn ("fork", "unable to");
1102 freopen ("/dev/null", "w", stdout);
1103 freopen ("/dev/null", "w", stderr);
1109 if ((fd = open ("/dev/tty", O_RDWR)) != -1) {
1110 ioctl (fd, TIOCNOTTY, NULL);
1113 #endif /* TIOCNOTTY */
1115 setpgid ((pid_t) 0, getpid ()); /* put in own process group */
1118 m_putenv ("USER", pw->pw_name);
1119 m_putenv ("HOME", pw->pw_dir);
1120 m_putenv ("SHELL", pw->pw_shell);
1126 /* parent process */
1127 if (!setjmp (myctx)) {
1128 SIGNAL (SIGALRM, alrmser);
1129 bytes = fstat (fd, &st) != -1 ? (int) st.st_size : 100;
1131 /* amount of time to wait depends on message size */
1133 /* give at least 5 minutes */
1135 } else if (bytes >= 90000) {
1136 /* a half hour is long enough */
1139 seconds = (bytes / 60) + 300;
1141 alarm ((unsigned int) seconds);
1142 status = pidwait (child_id, 0);
1146 if (status == RP_MOK || status == RP_OK)
1151 verbose_printf (", success.\n");
1153 if ((status & 0xff00) == 0xff00)
1154 verbose_printf (", system error\n");
1156 pidstatus (status, stdout, ", failed");
1158 return (status == 0 ? 0 : -1);
1161 * Ruthlessly kill the child and anything
1162 * else in its process group.
1164 KILLPG(child_id, SIGKILL);
1166 verbose_printf (", timed-out; terminated\n");
1176 #ifndef RELIABLE_SIGNALS
1177 SIGNAL (SIGALRM, alrmser);
1180 longjmp (myctx, DONE);
1185 * Get the `sender' from the envelope
1186 * information ("From " line).
1190 get_sender (char *envelope, char **sender)
1194 char buffer[BUFSIZ];
1196 if (envelope == NULL) {
1197 *sender = getcpy ("");
1201 i = strlen ("From ");
1202 strncpy (buffer, envelope + i, sizeof(buffer));
1203 if ((cp = strchr(buffer, '\n'))) {
1213 for (cp = buffer + strlen (buffer) - 1; cp >= buffer; cp--)
1218 *sender = getcpy (buffer);
1223 * Copy message into a temporary file.
1224 * While copying, it will do some header processing
1225 * including the extraction of the envelope information.
1229 copy_message (int qd, char *tmpfil, int fold)
1231 int i, first = 1, fd1, fd2;
1232 char buffer[BUFSIZ];
1235 strcpy (tmpfil, m_tmpfil (invo_name));
1237 /* open temporary file to put message in */
1238 if ((fd1 = open (tmpfil, O_RDWR | O_CREAT | O_TRUNC, 0600)) == -1)
1242 while ((i = read (qd, buffer, sizeof(buffer))) > 0)
1243 if (write (fd1, buffer, i) != i) {
1251 lseek (fd1, (off_t) 0, SEEK_SET);
1255 /* dup the fd for incoming message */
1256 if ((fd2 = dup (qd)) == -1) {
1261 /* now create a FILE pointer for it */
1262 if ((qfp = fdopen (fd2, "r")) == NULL) {
1268 /* dup the fd for temporary file */
1269 if ((fd2 = dup (fd1)) == -1) {
1275 /* now create a FILE pointer for it */
1276 if ((ffp = fdopen (fd2, "r+")) == NULL) {
1284 * copy message into temporary file
1285 * and massage the headers. Save
1286 * a copy of the "From " line for later.
1288 i = strlen ("From ");
1289 while (fgets (buffer, sizeof(buffer), qfp)) {
1292 if (!strncmp (buffer, "From ", i)) {
1294 char *fp, *cp, *hp, *ep;
1296 /* get copy of envelope information ("From " line) */
1297 envelope = getcpy (buffer);
1300 /* First go ahead and put "From " line in message */
1301 fputs (buffer, ffp);
1308 * Now create a "Return-Path:" line
1309 * from the "From " line.
1311 hp = cp = strchr(fp = envelope + i, ' ');
1312 while ((hp = strchr(++hp, 'r')))
1313 if (uprf (hp, "remote from")) {
1314 hp = strrchr(hp, ' ');
1318 /* return path for UUCP style addressing */
1319 ep = strchr(++hp, '\n');
1320 snprintf (buffer, sizeof(buffer), "Return-Path: %.*s!%.*s\n",
1321 ep - hp, hp, cp - fp, fp);
1323 /* return path for standard domain addressing */
1324 snprintf (buffer, sizeof(buffer), "Return-Path: %.*s\n",
1328 /* Add Return-Path header to message */
1329 fputs (buffer, ffp);
1333 /* Put the delivery date in message */
1342 fputs (buffer, ffp);
1354 lseek (fd1, (off_t) 0, SEEK_SET);
1366 * Trim strings for pretty printing of debugging output
1372 char buffer[BUFSIZ*4];
1378 /* copy string into temp buffer */
1379 strncpy (buffer, cp, sizeof(buffer));
1382 /* skip over leading whitespace */
1383 while (isspace(*bp))
1386 /* start at the end and zap trailing whitespace */
1387 for (sp = bp + strlen(bp) - 1; sp >= bp; sp--) {
1394 /* replace remaining whitespace with spaces */
1395 for (sp = bp; *sp; sp++)
1399 /* now return a copy */
1404 * Function for printing `verbose' messages.
1408 verbose_printf (char *fmt, ...)
1413 vfprintf (stdout, fmt, ap);
1416 fflush (stdout); /* now flush output */
1421 * Function for printing `verbose' delivery
1426 adorn (char *what, char *fmt, ...)
1432 eindex = errno; /* save the errno */
1433 fprintf (stdout, ", ");
1436 vfprintf (stdout, fmt, ap);
1441 fprintf (stdout, " %s: ", what);
1442 if ((s = strerror (eindex)))
1443 fprintf (stdout, "%s", s);
1445 fprintf (stdout, "Error %d", eindex);
1448 fputc ('\n', stdout);
1454 * Function for printing `debug' messages.
1458 debug_printf (char *fmt, ...)
1463 vfprintf (stderr, fmt, ap);
1469 * Check ndbm/db file(s) to see if the Message-Id of this
1470 * message matches the Message-Id of a previous message,
1471 * so we can discard it. If it doesn't match, we add the
1472 * Message-Id of this message to the ndbm/db file.
1475 suppress_duplicates (int fd, char *file)
1477 int fd1, lockfd, state, result;
1478 char *cp, buf[BUFSIZ], name[NAMESZ];
1483 if ((fd1 = dup (fd)) == -1)
1485 if (!(in = fdopen (fd1, "r"))) {
1491 for (state = FLD;;) {
1492 state = m_getfld (state, name, buf, sizeof(buf), in);
1497 /* Search for the message ID */
1498 if (strcasecmp (name, "Message-ID")) {
1499 while (state == FLDPLUS)
1500 state = m_getfld (state, name, buf, sizeof(buf), in);
1504 cp = add (buf, NULL);
1505 while (state == FLDPLUS) {
1506 state = m_getfld (state, name, buf, sizeof(buf), in);
1509 key.dptr = trimcpy (cp);
1510 key.dsize = strlen (key.dptr) + 1;
1514 if (!(db = dbm_open (file, O_RDWR | O_CREAT, 0600))) {
1515 advise (file, "unable to perform dbm_open on");
1521 * Since it is difficult to portable lock a ndbm file,
1522 * we will open and lock the Maildelivery file instead.
1523 * This will fail if your Maildelivery file doesn't
1526 if ((lockfd = lkopen(file, O_RDWR, 0)) == -1) {
1527 advise (file, "unable to perform file locking on");
1532 value = dbm_fetch (db, key);
1535 verbose_printf ("Message-ID: %s\n already received on %s",
1539 value.dptr = ddate + sizeof("Delivery-Date:");
1540 value.dsize = strlen(value.dptr) + 1;
1541 if (dbm_store (db, key, value, DBM_INSERT))
1542 advise (file, "possibly corrupt file");
1547 lkclose(lockfd, file);