3 * slocal.c -- asynchronously filter and deliver new mail
5 * This code is Copyright (c) 2002, by the authors of nmh. See the
6 * COPYRIGHT file in the root directory of the nmh distribution for
7 * complete copyright information.
11 * Under sendmail, users should add the line
13 * "| /usr/local/nmh/lib/slocal"
15 * to their $HOME/.forward file.
19 /* Changed to use getutent() and friends. Assumes that when getutent() exists,
20 * a number of other things also exist. Please check.
21 * Ruud de Rooij <ruud@ruud.org> Sun, 28 May 2000 17:28:55 +0200
25 #include <h/dropsbr.h>
26 #include <h/rcvmail.h>
27 #include <h/signals.h>
34 #include <sys/ioctl.h>
37 #ifdef INITGROUPS_HEADER
38 #include INITGROUPS_HEADER
40 /* On AIX 4.1, initgroups() is defined and even documented (giving the parameter
41 types as char* and int), but doesn't have a prototype in any of the system
42 header files. AIX 4.3, SunOS 4.1.3, and ULTRIX 4.2A have the same
44 extern int initgroups(char*, int);
47 /* This define is needed for Berkeley db v2 and above to
48 * make the header file expose the 'historical' ndbm APIs.
49 * We define it unconditionally because this is simple and
52 #define DB_DBM_HSEARCH 1
62 # define UTMP_FILE _PATH_UTMP
64 # define UTMP_FILE "/etc/utmp"
69 static struct swit switches[] = {
71 { "addr address", 0 },
77 { "sender address", 0 },
79 { "mailbox file", 0 },
81 { "home directory", -4 },
85 { "maildelivery file", 0 },
90 #define SUPPRESSDUP 10
92 #define NSUPPRESSDUP 11
93 { "nosuppressdup", 0 },
103 static int globbed = 0; /* have we built "vars" table yet? */
104 static int parsed = 0; /* have we built header field table yet */
105 static int utmped = 0; /* have we scanned umtp(x) file yet */
106 static int suppressdup = 0; /* are we suppressing duplicate messages? */
108 static int verbose = 0;
109 static int debug = 0;
111 static char *addr = NULL;
112 static char *user = NULL;
113 static char *info = NULL;
114 static char *file = NULL;
115 static char *sender = NULL;
116 static char *envelope = NULL; /* envelope information ("From " line) */
117 static char *mbox = NULL;
118 static char *home = NULL;
120 static struct passwd *pw; /* passwd file entry */
122 static char ddate[BUFSIZ]; /* record the delivery date */
125 static jmp_buf myctx;
127 /* flags for pair->p_flags */
129 #define P_ADR 0x01 /* field is address */
130 #define P_HID 0x02 /* special (fake) field */
142 * Lookup table for matching fields and patterns
143 * in messages. The rest of the table is added
144 * when the message is parsed.
146 static struct pair hdrs[NVEC + 1] = {
147 { "source", NULL, P_HID },
148 { "addr", NULL, P_HID },
149 { "Return-Path", NULL, P_ADR },
150 { "Reply-To", NULL, P_ADR },
151 { "From", NULL, P_ADR },
152 { "Sender", NULL, P_ADR },
153 { "To", NULL, P_ADR },
154 { "cc", NULL, P_ADR },
155 { "Resent-Reply-To", NULL, P_ADR },
156 { "Resent-From", NULL, P_ADR },
157 { "Resent-Sender", NULL, P_ADR },
158 { "Resent-To", NULL, P_ADR },
159 { "Resent-cc", NULL, P_ADR },
164 * The list of builtin variables to expand in a string
165 * before it is executed by the "pipe" or "qpipe" action.
167 static struct pair vars[] = {
168 { "sender", NULL, P_NIL },
169 { "address", NULL, P_NIL },
170 { "size", NULL, P_NIL },
171 { "reply-to", NULL, P_CHK },
172 { "info", NULL, P_NIL },
176 extern char **environ;
181 static int localmail (int, char *);
182 static int usr_delivery (int, char *, int);
183 static int split (char *, char **);
184 static int parse (int);
185 static void expand (char *, char *, int);
186 static void glob (int);
187 static struct pair *lookup (struct pair *, char *);
188 static int logged_in (void);
189 static int timely (char *, char *);
190 static int usr_file (int, char *, int);
191 static int usr_pipe (int, char *, char *, char **, int);
192 static int usr_folder (int, char *);
193 static RETSIGTYPE alrmser (int);
194 static void get_sender (char *, char **);
195 static int copy_message (int, char *, int);
196 static void verbose_printf (char *fmt, ...);
197 static void adorn (char *, char *, ...);
198 static void debug_printf (char *fmt, ...);
199 static int suppress_duplicates (int, char *);
200 static char *trim (char *);
204 main (int argc, char **argv)
208 char *cp, *mdlvr = NULL, buf[BUFSIZ];
209 char mailbox[BUFSIZ], tmpfil[BUFSIZ];
210 char **argp, **arguments;
213 setlocale(LC_ALL, "");
215 invo_name = r1bindex (*argv, '/');
217 /* foil search of user profile/context */
218 if (context_foil (NULL) == -1)
221 mts_init (invo_name);
222 arguments = getarguments (invo_name, argc, argv, 0);
225 /* Parse arguments */
226 while ((cp = *argp++)) {
228 switch (smatch (++cp, switches)) {
230 ambigsw (cp, switches);
233 adios (NULL, "-%s unknown", cp);
236 snprintf (buf, sizeof(buf),
237 "%s [switches] [address info sender]", invo_name);
238 print_help (buf, switches, 0);
241 print_version(invo_name);
245 if (!(addr = *argp++))/* allow -xyz arguments */
246 adios (NULL, "missing argument to %s", argp[-2]);
249 if (!(info = *argp++))/* allow -xyz arguments */
250 adios (NULL, "missing argument to %s", argp[-2]);
253 if (!(user = *argp++))/* allow -xyz arguments */
254 adios (NULL, "missing argument to %s", argp[-2]);
257 if (!(file = *argp++) || *file == '-')
258 adios (NULL, "missing argument to %s", argp[-2]);
261 if (!(sender = *argp++))/* allow -xyz arguments */
262 adios (NULL, "missing argument to %s", argp[-2]);
265 if (!(mbox = *argp++) || *mbox == '-')
266 adios (NULL, "missing argument to %s", argp[-2]);
269 if (!(home = *argp++) || *home == '-')
270 adios (NULL, "missing argument to %s", argp[-2]);
274 if (!(cp = *argp++) || *cp == '-')
275 adios (NULL, "missing argument to %s", argp[-2]);
277 adios (NULL, "only one maildelivery file at a time!");
300 switch (argp - (argv + 1)) {
316 addr = getusername ();
318 user = (cp = strchr(addr, '.')) ? ++cp : addr;
319 if ((pw = getpwnam (user)) == NULL)
320 adios (NULL, "no such local user as %s", user);
322 if (chdir (pw->pw_dir) == -1)
326 if (geteuid() == 0) {
328 initgroups (pw->pw_name, pw->pw_gid);
335 setbuf (stdin, NULL);
337 /* Record the delivery time */
338 if ((now = dlocaltimenow ()) == NULL)
339 adios (NULL, "unable to ascertain local time");
340 snprintf (ddate, sizeof(ddate), "Delivery-Date: %s\n", dtimenow (0));
343 * Copy the message to a temporary file
348 /* getting message from file */
349 if ((tempfd = open (file, O_RDONLY)) == -1)
350 adios (file, "unable to open");
352 debug_printf ("retrieving message from file \"%s\"\n", file);
353 if ((fd = copy_message (tempfd, tmpfil, 1)) == -1)
354 adios (NULL, "unable to create temporary file");
357 /* getting message from stdin */
359 debug_printf ("retrieving message from stdin\n");
360 if ((fd = copy_message (fileno (stdin), tmpfil, 1)) == -1)
361 adios (NULL, "unable to create temporary file");
365 debug_printf ("temporary file=\"%s\"\n", tmpfil);
367 /* Delete the temp file now or a copy of every single message passed through
368 slocal will be left in the /tmp directory until deleted manually! This
369 unlink() used to be under an 'else' of the 'if (debug)' above, but since
370 some people like to always run slocal with -debug and log the results,
371 the /tmp directory would get choked over time. Of course, now that we
372 always delete the temp file, the "temporary file=" message above is
373 somewhat pointless -- someone watching debug output wouldn't have a
374 chance to 'tail -f' or 'ln' the temp file before it's unlinked. The best
375 thing would be to delay this unlink() until later if debug == 1, but I'll
376 leave that for someone who cares about the temp-file-accessing
377 functionality (they'll have to watch out for cases where we adios()). */
380 if (!(fp = fdopen (fd, "r+")))
381 adios (NULL, "unable to access temporary file");
384 * If no sender given, extract it
385 * from envelope information. */
387 get_sender (envelope, &sender);
390 snprintf (mailbox, sizeof(mailbox), "%s/%s",
391 mmdfldir[0] ? mmdfldir : pw->pw_dir,
392 mmdflfil[0] ? mmdflfil : pw->pw_name);
399 debug_printf ("addr=\"%s\"\n", trim(addr));
400 debug_printf ("user=\"%s\"\n", trim(user));
401 debug_printf ("info=\"%s\"\n", trim(info));
402 debug_printf ("sender=\"%s\"\n", trim(sender));
403 debug_printf ("envelope=\"%s\"\n", envelope ? trim(envelope) : "");
404 debug_printf ("mbox=\"%s\"\n", trim(mbox));
405 debug_printf ("home=\"%s\"\n", trim(home));
406 debug_printf ("ddate=\"%s\"\n", trim(ddate));
407 debug_printf ("now=%02d:%02d\n\n", now->tw_hour, now->tw_min);
410 /* deliver the message */
411 status = localmail (fd, mdlvr);
413 done (status != -1 ? RCV_MOK : RCV_MBX);
419 * Main routine for delivering message.
423 localmail (int fd, char *mdlvr)
425 /* check if this message is a duplicate */
427 suppress_duplicates(fd, mdlvr ? mdlvr : ".maildelivery") == DONE)
430 /* delivery according to personal Maildelivery file */
431 if (usr_delivery (fd, mdlvr ? mdlvr : ".maildelivery", 0) != -1)
434 /* delivery according to global Maildelivery file */
435 if (usr_delivery (fd, maildelivery, 1) != -1)
439 verbose_printf ("(delivering to standard mail spool)\n");
441 /* last resort - deliver to standard mail spool */
443 return usr_file (fd, mbox, MBOX_FORMAT);
445 return usr_file (fd, mbox, MMDF_FORMAT);
450 #define matches(a,b) (stringdex (b, a) >= 0)
453 * Parse the delivery file, and process incoming message.
457 usr_delivery (int fd, char *delivery, int su)
459 int i, accept, status=1, won, vecp, next;
460 char *field, *pattern, *action, *result, *string;
461 char buffer[BUFSIZ], tmpbuf[BUFSIZ];
462 char *cp, *vec[NVEC];
467 /* open the delivery file */
468 if ((fp = fopen (delivery, "r")) == NULL)
471 /* check if delivery file has bad ownership or permissions */
472 if (fstat (fileno (fp), &st) == -1
473 || (st.st_uid != 0 && (su || st.st_uid != pw->pw_uid))
474 || st.st_mode & (S_IWGRP|S_IWOTH)) {
476 verbose_printf ("WARNING: %s has bad ownership/modes (su=%d,uid=%d,owner=%d,mode=0%o)\n",
477 delivery, su, (int) pw->pw_uid, (int) st.st_uid, (int) st.st_mode);
485 /* read and process delivery file */
486 while (fgets (buffer, sizeof(buffer), fp)) {
487 /* skip comments and empty lines */
488 if (*buffer == '#' || *buffer == '\n')
491 /* zap trailing newline */
492 if ((cp = strchr(buffer, '\n')))
495 /* split buffer into fields */
496 vecp = split (buffer, vec);
498 /* check for too few fields */
501 debug_printf ("WARNING: entry with only %d fields, skipping.\n", vecp);
506 for (i = 0; vec[i]; i++)
507 debug_printf ("vec[%d]: \"%s\"\n", i, trim(vec[i]));
516 /* find out how to perform the action */
521 * If previous condition failed, don't
522 * do this - else fall through
525 continue; /* else fall */
529 * If already delivered, skip this action. Else
530 * consider delivered if action is successful.
533 continue; /* else fall */
538 * Take action, and consider delivered if
539 * action is successful.
548 * Take action, but don't consider delivered, even
549 * if action is successful
556 if (!mh_strcasecmp (vec[5], "select")) {
557 if (logged_in () != -1)
559 if (vecp > 7 && timely (vec[6], vec[7]) == -1)
564 /* check if the field matches */
572 * "default" matches only if the message hasn't
573 * been delivered yet.
575 if (!mh_strcasecmp (field, "default")) {
582 /* parse message and build lookup table */
583 if (!parsed && parse (fd) == -1) {
588 * find header field in lookup table, and
589 * see if the pattern matches.
591 if ((p = lookup (hdrs, field)) && (p->p_value != NULL)
592 && matches (p->p_value, pattern)) {
601 /* find out the action to perform */
604 /* deliver to quoted pipe */
605 if (mh_strcasecmp (action, "qpipe"))
606 continue; /* else fall */
608 expand (tmpbuf, string, fd);
609 if (split (tmpbuf, vec) < 1)
611 status = usr_pipe (fd, tmpbuf, vec[0], vec, 0);
615 /* deliver to pipe */
616 if (mh_strcasecmp (action, "pipe"))
617 continue; /* else fall */
621 expand (tmpbuf, string, fd);
624 status = usr_pipe (fd, tmpbuf, "/bin/sh", vec + 2, 0);
629 if (!mh_strcasecmp (action, "file")) {
630 status = usr_file (fd, string, MBOX_FORMAT);
633 /* deliver to nmh folder */
634 else if (mh_strcasecmp (action, "folder"))
635 continue; /* else fall */
637 status = usr_folder (fd, string);
642 if (!mh_strcasecmp (action, "mmdf")) {
643 status = usr_file (fd, string, MMDF_FORMAT);
647 else if (mh_strcasecmp (action, "mbox"))
648 continue; /* else fall */
652 status = usr_file (fd, string, MBOX_FORMAT);
657 if (mh_strcasecmp (action, "destroy"))
663 if (status) next = 0; /* action failed, mark for 'N' result */
665 if (accept && status == 0)
670 return (won ? 0 : -1);
677 * Split buffer into fields (delimited by whitespace or
678 * comma's). Return the number of fields found.
682 split (char *cp, char **vec)
689 /* split into a maximum of NVEC fields */
690 for (i = 0; i <= NVEC;) {
693 /* zap any whitespace and comma's */
694 while (isspace (*s) || *s == ',')
697 /* end of buffer, time to leave */
701 /* get double quote text as a single field */
703 for (vec[i++] = ++s; *s && *s != '"'; s++) {
705 * Check for escaped double quote. We need
706 * to shift the string to remove slash.
714 if (*s == '"') /* zap trailing double quote */
719 if (*s == QUOTE && *++s != '"')
723 /* move forward to next field delimiter */
724 while (*s && !isspace (*s) && *s != ',')
734 * Parse the headers of a message, and build the
735 * lookup table for matching fields and patterns.
744 char name[NAMESZ], field[BUFSIZ];
751 /* get a new FILE pointer to message */
752 if ((fd1 = dup (fd)) == -1)
754 if ((in = fdopen (fd1, "r")) == NULL) {
760 /* add special entries to lookup table */
761 if ((p = lookup (hdrs, "source")))
762 p->p_value = getcpy (sender);
763 if ((p = lookup (hdrs, "addr")))
764 p->p_value = getcpy (addr);
767 * Scan the headers of the message and build
770 for (i = 0, state = FLD;;) {
771 switch (state = m_getfld (state, name, field, sizeof(field), in)) {
775 lp = add (field, NULL);
776 while (state == FLDPLUS) {
777 state = m_getfld (state, name, field, sizeof(field), in);
778 lp = add (field, lp);
780 for (p = hdrs; p->p_name; p++) {
781 if (!mh_strcasecmp (p->p_name, name)) {
782 if (!(p->p_flags & P_HID)) {
783 if ((cp = p->p_value)) {
784 if (p->p_flags & P_ADR) {
785 dp = cp + strlen (cp) - 1;
788 cp = add (",\n\t", cp);
793 p->p_value = add (lp, cp);
799 if (p->p_name == NULL && i < NVEC) {
800 p->p_name = getcpy (name);
817 advise (NULL, "format error in message");
821 advise (NULL, "internal error in m_getfld");
829 if ((p = lookup (vars, "reply-to"))) {
830 if ((q = lookup (hdrs, "reply-to")) == NULL || q->p_value == NULL)
831 q = lookup (hdrs, "from");
832 p->p_value = getcpy (q ? q->p_value : "");
833 p->p_flags &= ~P_CHK;
835 debug_printf ("vars[%d]: name=\"%s\" value=\"%s\"\n",
836 p - vars, p->p_name, trim(p->p_value));
839 for (p = hdrs; p->p_name; p++)
840 debug_printf ("hdrs[%d]: name=\"%s\" value=\"%s\"\n",
841 p - hdrs, p->p_name, p->p_value ? trim(p->p_value) : "");
852 * Expand any builtin variables such as $(sender),
853 * $(address), etc., in a string.
857 expand (char *s1, char *s2, int fd)
865 while ((c = *s2++)) {
866 if (c != '$' || *s2 != LPAREN) {
869 for (cp = ++s2; *s2 && *s2 != RPAREN; s2++)
876 if ((p = lookup (vars, cp))) {
877 if (!parsed && (p->p_flags & P_CHK))
880 strcpy (s1, p->p_value);
890 * Fill in the information missing from the "vars"
891 * table, which is necessary to expand any builtin
892 * variables in the string for a "pipe" or "qpipe"
906 if ((p = lookup (vars, "sender")))
907 p->p_value = getcpy (sender);
908 if ((p = lookup (vars, "address")))
909 p->p_value = getcpy (addr);
910 if ((p = lookup (vars, "size"))) {
911 snprintf (buffer, sizeof(buffer), "%d",
912 fstat (fd, &st) != -1 ? (int) st.st_size : 0);
913 p->p_value = getcpy (buffer);
915 if ((p = lookup (vars, "info")))
916 p->p_value = getcpy (info);
919 for (p = vars; p->p_name; p++)
920 debug_printf ("vars[%d]: name=\"%s\" value=\"%s\"\n",
921 p - vars, p->p_name, trim(p->p_value));
927 * Find a matching name in a lookup table. If found,
928 * return the "pairs" entry, else return NULL.
932 lookup (struct pair *pairs, char *key)
934 for (; pairs->p_name; pairs++)
935 if (!mh_strcasecmp (pairs->p_name, key))
943 * Check utmp(x) file to see if user is currently
958 while ((utp = getutent()) != NULL) {
960 #ifdef HAVE_STRUCT_UTMP_UT_TYPE
961 utp->ut_type == USER_PROCESS
965 && strncmp (user, utp->ut_name, sizeof(utp->ut_name)) == 0) {
969 return (utmped = DONE);
974 return (utmped = NOTOK);
986 if ((uf = fopen (UTMP_FILE, "r")) == NULL)
989 while (fread ((char *) &ut, sizeof(ut), 1, uf) == 1) {
990 if (ut.ut_name[0] != 0
991 && strncmp (user, ut.ut_name, sizeof(ut.ut_name)) == 0) {
995 return (utmped = DONE);
1000 return (utmped = NOTOK);
1004 #define check(t,a,b) if (t < a || t > b) return -1
1005 #define cmpar(h1,m1,h2,m2) if (h1 < h2 || (h1 == h2 && m1 < m2)) return 0
1008 timely (char *t1, char *t2)
1010 int t1hours, t1mins, t2hours, t2mins;
1012 if (sscanf (t1, "%d:%d", &t1hours, &t1mins) != 2)
1014 check (t1hours, 0, 23);
1015 check (t1mins, 0, 59);
1017 if (sscanf (t2, "%d:%d", &t2hours, &t2mins) != 2)
1019 check (t2hours, 0, 23);
1020 check (t2mins, 0, 59);
1022 cmpar (now->tw_hour, now->tw_min, t1hours, t1mins);
1023 cmpar (t2hours, t2mins, now->tw_hour, now->tw_min);
1030 * Deliver message by appending to a file.
1034 usr_file (int fd, char *mailbox, int mbx_style)
1039 verbose_printf ("delivering to file \"%s\"", mailbox);
1041 if (mbx_style == MBOX_FORMAT) {
1043 verbose_printf (" (mbox style)");
1047 verbose_printf (" (mmdf style)");
1051 /* open and lock the file */
1052 if ((md = mbx_open (mailbox, mbx_style, pw->pw_uid, pw->pw_gid, m_gmprot())) == -1) {
1054 adorn ("", "unable to open:");
1058 lseek (fd, (off_t) 0, SEEK_SET);
1060 /* append message to file */
1061 if (mbx_copy (mailbox, mbx_style, md, fd, mapping, NULL, verbose) == -1) {
1063 adorn ("", "error writing to:");
1067 /* close and unlock file */
1068 if (mbx_close (mailbox, md) == NOTOK) {
1070 adorn ("", "error closing:");
1075 verbose_printf (", success.\n");
1081 * Deliver message to a nmh folder.
1085 usr_folder (int fd, char *string)
1088 char folder[BUFSIZ], *vec[3];
1090 /* get folder name ready */
1092 strncpy(folder, string, sizeof(folder));
1094 snprintf(folder, sizeof(folder), "+%s", string);
1097 verbose_printf ("delivering to folder \"%s\"", folder + 1);
1099 vec[0] = "rcvstore";
1103 /* use rcvstore to put message in folder */
1104 status = usr_pipe (fd, "rcvstore", rcvstoreproc, vec, 1);
1108 * Currently, verbose status messages are handled by usr_pipe().
1112 verbose_printf (", success.\n");
1114 verbose_printf (", failed.\n");
1122 * Deliver message to a process.
1126 usr_pipe (int fd, char *cmd, char *pgm, char **vec, int suppress)
1129 int i, bytes, seconds, status;
1132 if (verbose && !suppress)
1133 verbose_printf ("delivering to pipe \"%s\"", cmd);
1135 lseek (fd, (off_t) 0, SEEK_SET);
1137 for (i = 0; (child_id = fork()) == -1 && i < 5; i++)
1144 adorn ("fork", "unable to");
1151 freopen ("/dev/null", "w", stdout);
1152 freopen ("/dev/null", "w", stderr);
1158 if ((fd = open ("/dev/tty", O_RDWR)) != -1) {
1159 ioctl (fd, TIOCNOTTY, NULL);
1162 #endif /* TIOCNOTTY */
1164 setpgid ((pid_t) 0, getpid ()); /* put in own process group */
1167 m_putenv ("USER", pw->pw_name);
1168 m_putenv ("HOME", pw->pw_dir);
1169 m_putenv ("SHELL", pw->pw_shell);
1175 /* parent process */
1176 if (!setjmp (myctx)) {
1177 SIGNAL (SIGALRM, alrmser);
1178 bytes = fstat (fd, &st) != -1 ? (int) st.st_size : 100;
1180 /* amount of time to wait depends on message size */
1182 /* give at least 5 minutes */
1184 } else if (bytes >= 90000) {
1185 /* a half hour is long enough */
1188 seconds = (bytes / 60) + 300;
1190 alarm ((unsigned int) seconds);
1191 status = pidwait (child_id, 0);
1196 verbose_printf (", success.\n");
1198 if ((status & 0xff00) == 0xff00)
1199 verbose_printf (", system error\n");
1201 pidstatus (status, stdout, ", failed");
1203 return (status == 0 ? 0 : -1);
1206 * Ruthlessly kill the child and anything
1207 * else in its process group.
1209 killpg(child_id, SIGKILL);
1211 verbose_printf (", timed-out; terminated\n");
1221 #ifndef RELIABLE_SIGNALS
1222 SIGNAL (SIGALRM, alrmser);
1225 longjmp (myctx, DONE);
1230 * Get the `sender' from the envelope
1231 * information ("From " line).
1235 get_sender (char *envelope, char **sender)
1239 unsigned char buffer[BUFSIZ];
1241 if (envelope == NULL) {
1242 *sender = getcpy ("");
1246 i = strlen ("From ");
1247 strncpy (buffer, envelope + i, sizeof(buffer));
1248 if ((cp = strchr(buffer, '\n'))) {
1258 for (cp = buffer + strlen (buffer) - 1; cp >= buffer; cp--)
1263 *sender = getcpy (buffer);
1268 * Copy message into a temporary file.
1269 * While copying, it will do some header processing
1270 * including the extraction of the envelope information.
1274 copy_message (int qd, char *tmpfil, int fold)
1276 int i, first = 1, fd1, fd2;
1277 char buffer[BUFSIZ];
1281 tfile = m_mktemp2(NULL, invo_name, &fd1, NULL);
1282 if (tfile == NULL) return -1;
1284 strncpy (tmpfil, tfile, BUFSIZ);
1287 while ((i = read (qd, buffer, sizeof(buffer))) > 0)
1288 if (write (fd1, buffer, i) != i) {
1296 lseek (fd1, (off_t) 0, SEEK_SET);
1300 /* dup the fd for incoming message */
1301 if ((fd2 = dup (qd)) == -1) {
1306 /* now create a FILE pointer for it */
1307 if ((qfp = fdopen (fd2, "r")) == NULL) {
1313 /* dup the fd for temporary file */
1314 if ((fd2 = dup (fd1)) == -1) {
1320 /* now create a FILE pointer for it */
1321 if ((ffp = fdopen (fd2, "r+")) == NULL) {
1329 * copy message into temporary file
1330 * and massage the headers. Save
1331 * a copy of the "From " line for later.
1333 i = strlen ("From ");
1334 while (fgets (buffer, sizeof(buffer), qfp)) {
1337 if (!strncmp (buffer, "From ", i)) {
1339 char *fp, *cp, *hp, *ep;
1341 /* get copy of envelope information ("From " line) */
1342 envelope = getcpy (buffer);
1345 /* First go ahead and put "From " line in message */
1346 fputs (buffer, ffp);
1353 * Now create a "Return-Path:" line
1354 * from the "From " line.
1356 hp = cp = strchr(fp = envelope + i, ' ');
1357 while ((hp = strchr(++hp, 'r')))
1358 if (uprf (hp, "remote from")) {
1359 hp = strrchr(hp, ' ');
1363 /* return path for UUCP style addressing */
1364 ep = strchr(++hp, '\n');
1365 snprintf (buffer, sizeof(buffer), "Return-Path: %.*s!%.*s\n",
1366 (int)(ep - hp), hp, (int)(cp - fp), fp);
1368 /* return path for standard domain addressing */
1369 snprintf (buffer, sizeof(buffer), "Return-Path: %.*s\n",
1370 (int)(cp - fp), fp);
1373 /* Add Return-Path header to message */
1374 fputs (buffer, ffp);
1378 /* Put the delivery date in message */
1387 fputs (buffer, ffp);
1399 lseek (fd1, (off_t) 0, SEEK_SET);
1411 * Trim strings for pretty printing of debugging output
1417 char buffer[BUFSIZ*4];
1418 unsigned char *bp, *sp;
1423 /* copy string into temp buffer */
1424 strncpy (buffer, cp, sizeof(buffer));
1427 /* skip over leading whitespace */
1428 while (isspace(*bp))
1431 /* start at the end and zap trailing whitespace */
1432 for (sp = bp + strlen(bp) - 1; sp >= bp; sp--) {
1439 /* replace remaining whitespace with spaces */
1440 for (sp = bp; *sp; sp++)
1444 /* now return a copy */
1449 * Function for printing `verbose' messages.
1453 verbose_printf (char *fmt, ...)
1458 vfprintf (stdout, fmt, ap);
1461 fflush (stdout); /* now flush output */
1466 * Function for printing `verbose' delivery
1471 adorn (char *what, char *fmt, ...)
1477 eindex = errno; /* save the errno */
1478 fprintf (stdout, ", ");
1481 vfprintf (stdout, fmt, ap);
1486 fprintf (stdout, " %s: ", what);
1487 if ((s = strerror (eindex)))
1488 fprintf (stdout, "%s", s);
1490 fprintf (stdout, "Error %d", eindex);
1493 fputc ('\n', stdout);
1499 * Function for printing `debug' messages.
1503 debug_printf (char *fmt, ...)
1508 vfprintf (stderr, fmt, ap);
1514 * Check ndbm/db file(s) to see if the Message-Id of this
1515 * message matches the Message-Id of a previous message,
1516 * so we can discard it. If it doesn't match, we add the
1517 * Message-Id of this message to the ndbm/db file.
1520 suppress_duplicates (int fd, char *file)
1522 int fd1, lockfd, state, result;
1523 char *cp, buf[BUFSIZ], name[NAMESZ];
1528 if ((fd1 = dup (fd)) == -1)
1530 if (!(in = fdopen (fd1, "r"))) {
1536 for (state = FLD;;) {
1537 state = m_getfld (state, name, buf, sizeof(buf), in);
1542 /* Search for the message ID */
1543 if (mh_strcasecmp (name, "Message-ID")) {
1544 while (state == FLDPLUS)
1545 state = m_getfld (state, name, buf, sizeof(buf), in);
1549 cp = add (buf, NULL);
1550 while (state == FLDPLUS) {
1551 state = m_getfld (state, name, buf, sizeof(buf), in);
1554 key.dptr = trimcpy (cp);
1555 key.dsize = strlen (key.dptr) + 1;
1559 if (!(db = dbm_open (file, O_RDWR | O_CREAT, 0600))) {
1560 advise (file, "unable to perform dbm_open on");
1566 * Since it is difficult to portable lock a ndbm file,
1567 * we will open and lock the Maildelivery file instead.
1568 * This will fail if your Maildelivery file doesn't
1571 if ((lockfd = lkopen(file, O_RDWR, 0)) == -1) {
1572 advise (file, "unable to perform file locking on");
1577 value = dbm_fetch (db, key);
1580 verbose_printf ("Message-ID: %s\n already received on %s",
1584 value.dptr = ddate + sizeof("Delivery-Date:");
1585 value.dsize = strlen(value.dptr) + 1;
1586 if (dbm_store (db, key, value, DBM_INSERT))
1587 advise (file, "possibly corrupt file");
1592 lkclose(lockfd, file);