2 * Copyright (c) 1998-2004 Sendmail, Inc. and its suppliers.
4 * Copyright (c) 1990, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
7 * By using this file, you agree to the terms and conditions set
8 * forth in the LICENSE file which can be found at the top level of
9 * the sendmail distribution.
16 "@(#) Copyright (c) 1998-2004 Sendmail, Inc. and its suppliers.\n\
17 All rights reserved.\n\
18 Copyright (c) 1990, 1993, 1994\n\
19 The Regents of the University of California. All rights reserved.\n")
21 SM_IDSTR(id, "@(#)$Id: mail.local.c,v 8.254 2006/10/12 22:23:45 ca Exp $")
24 #include <sm/errstring.h>
26 #include <sm/limits.h>
29 # undef EX_OK /* unistd.h may have another use for this */
31 # define LOCKFILE_PMODE 0
33 #include <sm/sysexits.h>
37 #endif /* ! HASHSPOOL */
39 # define HASHSPOOLMD5 0
40 #endif /* ! HASHSPOOLMD5 */
43 ** This is not intended to work on System V derived systems
44 ** such as Solaris or HP-UX, since they use a totally different
45 ** approach to mailboxes (essentially, they have a set-group-ID program
46 ** rather than set-user-ID, and they rely on the ability to "give away"
47 ** files to do their work). IT IS NOT A BUG that this doesn't
48 ** work on such architectures.
55 #include <sys/types.h>
59 # include <sys/socket.h>
60 # include <sys/file.h>
61 # include <netinet/in.h>
62 # include <arpa/nameser.h>
66 #include <sm/string.h>
71 #include <sendmail/pathnames.h>
78 # include <openssl/md5.h>
79 # endif /* HASHSPOOLMD5 */
80 #endif /* HASHSPOOL */
84 # define LOCKTO_RM 300 /* timeout for stale lockfile removal */
85 #endif /* ! LOCKTO_RM */
87 # define LOCKTO_GLOB 400 /* global timeout for lockfile creation */
88 #endif /* ! LOCKTO_GLOB */
90 /* define a realloc() which works for NULL pointers */
91 #define REALLOC(ptr, size) (((ptr) == NULL) ? malloc(size) : realloc(ptr, size))
94 ** If you don't have flock, you could try using lockf instead.
98 # define flock(a, b) lockf(a, b, 0)
101 # endif /* LOCK_EX */
102 # define LOCK_EX F_LOCK
103 #endif /* LDA_USE_LOCKF */
106 # include <sys/file.h>
107 #endif /* ! LOCK_EX */
110 ** If you don't have setreuid, and you have saved uids, and you have
111 ** a seteuid() call that doesn't try to emulate using setuid(), then
112 ** you can try defining LDA_USE_SETEUID.
115 #ifdef LDA_USE_SETEUID
116 # define setreuid(r, e) seteuid(e)
117 #endif /* LDA_USE_SETEUID */
119 #ifdef LDA_CONTENTLENGTH
120 # define CONTENTLENGTH 1
121 #endif /* LDA_CONTENTLENGTH */
124 # define INADDRSZ 4 /* size of an IPv4 address in bytes */
125 #endif /* ! INADDRSZ */
128 # include <maillock.h>
129 #endif /* MAILLOCK */
131 #ifndef MAILER_DAEMON
132 # define MAILER_DAEMON "MAILER-DAEMON"
133 #endif /* ! MAILER_DAEMON */
136 char ContentHdr[40] = "Content-Length: ";
139 #endif /* CONTENTLENGTH */
141 bool EightBitMime = true; /* advertise 8BITMIME in LMTP */
142 char ErrBuf[10240]; /* error buffer */
143 int ExitVal = EX_OK; /* sysexits.h error value. */
144 bool HoldErrs = false; /* Hold errors in ErrBuf */
145 bool LMTPMode = false;
146 bool BounceQuota = false; /* permanent error when over quota */
147 bool CloseMBDB = false;
148 char *HomeMailFile = NULL; /* store mail in homedir */
151 int HashType = HASH_NONE;
153 bool StripRcptDomain = true;
154 #else /* HASHSPOOL */
155 # define StripRcptDomain true
156 #endif /* HASHSPOOL */
157 char SpoolPath[MAXPATHLEN];
159 char *parseaddr __P((char *, bool));
160 char *process_recipient __P((char *));
161 void dolmtp __P((void));
162 void deliver __P((int, char *));
163 int e_to_sys __P((int));
164 void notifybiff __P((char *));
165 int store __P((char *, bool *));
166 void usage __P((void));
167 int lockmbox __P((char *));
168 void unlockmbox __P((void));
169 void mailerr __P((const char *, const char *, ...));
170 void flush_error __P((void));
172 const char *hashname __P((char *));
173 #endif /* HASHSPOOL */
176 static void sm_exit __P((int));
185 CloseMBDB = false; /* not really necessary, but ... */
199 char *mbdbname = "pw";
205 /* make sure we have some open file descriptors */
206 for (fd = 10; fd < 30; fd++)
209 /* use a reasonable umask */
213 openlog("mail.local", 0, LOG_MAIL);
214 # else /* LOG_MAIL */
215 openlog("mail.local", 0);
216 # endif /* LOG_MAIL */
220 /* XXX can this be converted to a compile time check? */
221 if (sm_strlcpy(SpoolPath, _PATH_MAILDIR, sizeof(SpoolPath)) >=
224 mailerr("421", "Configuration error: _PATH_MAILDIR too large");
228 while ((ch = getopt(argc, argv, "7bdD:f:h:r:lH:p:n")) != -1)
229 #else /* HASHSPOOL */
230 while ((ch = getopt(argc, argv, "7bdD:f:h:r:l")) != -1)
231 #endif /* HASHSPOOL */
235 case '7': /* Do not advertise 8BITMIME */
236 EightBitMime = false;
239 case 'b': /* bounce mail when over quota. */
243 case 'd': /* Backward compatible. */
246 case 'D': /* mailbox database type */
251 case 'r': /* Backward compatible. */
254 mailerr(NULL, "Multiple -f options");
261 if (optarg != NULL || *optarg != '\0')
262 HomeMailFile = optarg;
265 mailerr(NULL, "-h: missing filename");
277 if (optarg == NULL || *optarg == '\0')
279 mailerr(NULL, "-H: missing hashinfo");
285 HashType = HASH_USER;
292 # endif /* HASHSPOOLMD5 */
295 mailerr(NULL, "-H: unknown hash type");
298 if (optarg[1] == '\0')
300 mailerr(NULL, "-H: invalid hash depth");
303 HashDepth = atoi(&optarg[1]);
304 if ((HashDepth <= 0) || ((HashDepth * 2) >= MAXPATHLEN))
306 mailerr(NULL, "-H: invalid hash depth");
312 if (optarg == NULL || *optarg == '\0')
314 mailerr(NULL, "-p: missing spool path");
317 if (sm_strlcpy(SpoolPath, optarg, sizeof(SpoolPath)) >=
320 mailerr(NULL, "-p: invalid spool path");
326 StripRcptDomain = false;
328 #endif /* HASHSPOOL */
338 /* initialize biff structures */
341 err = sm_mbdb_initialize(mbdbname);
344 char *errcode = "521";
346 if (err == EX_TEMPFAIL)
349 mailerr(errcode, "Can not open mailbox database %s: %s",
350 mbdbname, sm_strexit(err));
359 mailerr("421", "Users should not be specified in command line if LMTP required");
360 sm_exit(EX_TEMPFAIL);
368 /* Non-LMTP from here on out */
373 ** If from not specified, use the name from getlogin() if the
374 ** uid matches, otherwise, use the name from the password file
375 ** corresponding to the uid.
379 if (from == NULL && ((from = getlogin()) == NULL ||
380 (pw = getpwnam(from)) == NULL ||
382 from = (pw = getpwuid(uid)) != NULL ? pw->pw_name : "???";
385 ** There is no way to distinguish the error status of one delivery
386 ** from the rest of the deliveries. So, if we failed hard on one
387 ** or more deliveries, but had no failures on any of the others, we
388 ** return a hard failure. If we failed temporarily on one or more
389 ** deliveries, we return a temporary failure regardless of the other
390 ** failures. This results in the delivery being reattempted later
391 ** at the expense of repeated failures and multiple deliveries.
395 fd = store(from, NULL);
402 for (; *argv != NULL; ++argv)
426 while (*p != ',' && *p != ':' && *p != '\0')
431 /* Skip over , or : */
438 while (*p != '\0' && *p != '@' && *p != '>')
448 while (*p != '\0' && *p != '\"')
457 if (*p == '\0' || *(p + 1) == '\0')
461 if (*p == '+' && rcpt)
471 while (*p != '\0' && *p != '>')
481 if (*p != '\0' && *p != ' ')
493 mailerr("421 4.3.0", "Memory exhausted");
494 sm_exit(EX_TEMPFAIL);
497 (void) sm_strlcpy(p, s, l);
502 process_recipient(addr)
507 switch (sm_mbdb_lookup(addr, &user))
513 return "550 5.1.1 User unknown";
516 return "451 4.3.0 User database failure; retry later";
519 return "550 5.3.0 User database failure";
528 char *return_path = NULL;
529 char **rcpt_addr = NULL;
532 bool gotlhlo = false;
537 char myhostname[1024];
540 memset(myhostname, '\0', sizeof myhostname);
541 (void) gethostname(myhostname, sizeof myhostname - 1);
542 if (myhostname[0] == '\0')
543 sm_strlcpy(myhostname, "localhost", sizeof myhostname);
545 printf("220 %s LMTP ready\r\n", myhostname);
548 (void) fflush(stdout);
549 if (fgets(buf, sizeof(buf) - 1, stdin) == NULL)
551 p = buf + strlen(buf) - 1;
552 if (p >= buf && *p == '\n')
554 if (p >= buf && *p == '\r')
561 if (sm_strcasecmp(buf, "data") == 0)
567 mailerr("503 5.5.1", "No recipients");
571 msgfd = store(return_path, &inbody);
573 if (msgfd < 0 && !inbody)
579 for (i = 0; i < rcpt_num; i++)
583 /* print error for rcpt */
587 p = strchr(rcpt_addr[i], '+');
590 deliver(msgfd, rcpt_addr[i]);
602 if (sm_strncasecmp(buf, "lhlo ", 5) == 0)
604 /* check for duplicate per RFC 1651 4.2 */
607 mailerr("503", "%s Duplicate LHLO",
612 printf("250-%s\r\n", myhostname);
614 printf("250-8BITMIME\r\n");
615 printf("250-ENHANCEDSTATUSCODES\r\n");
616 printf("250 PIPELINING\r\n");
625 if (sm_strncasecmp(buf, "mail ", 5) == 0)
627 if (return_path != NULL)
630 "Nested MAIL command");
633 if (sm_strncasecmp(buf + 5, "from:", 5) != 0 ||
634 ((return_path = parseaddr(buf + 10,
638 "Syntax error in parameters");
641 printf("250 2.5.0 Ok\r\n");
650 if (sm_strcasecmp(buf, "noop") == 0)
652 printf("250 2.0.0 Ok\r\n");
661 if (sm_strcasecmp(buf, "quit") == 0)
663 printf("221 2.0.0 Bye\r\n");
672 if (sm_strncasecmp(buf, "rcpt ", 5) == 0)
674 if (return_path == NULL)
677 "Need MAIL command");
680 if (rcpt_num >= rcpt_alloc)
682 rcpt_alloc += RCPT_GROW;
683 rcpt_addr = (char **)
684 REALLOC((char *) rcpt_addr,
687 if (rcpt_addr == NULL)
691 sm_exit(EX_TEMPFAIL);
694 if (sm_strncasecmp(buf + 5, "to:", 3) != 0 ||
695 ((rcpt_addr[rcpt_num] = parseaddr(buf + 8,
696 StripRcptDomain)) == NULL))
699 "Syntax error in parameters");
702 err = process_recipient(rcpt_addr[rcpt_num]);
705 mailerr(NULL, "%s", err);
709 printf("250 2.1.5 Ok\r\n");
712 else if (sm_strcasecmp(buf, "rset") == 0)
714 printf("250 2.0.0 Ok\r\n");
718 free(rcpt_addr[--rcpt_num]);
719 if (return_path != NULL)
730 if (sm_strncasecmp(buf, "vrfy ", 5) == 0)
732 printf("252 2.3.3 Try RCPT to attempt delivery\r\n");
741 mailerr("500 5.5.2", "Syntax error");
756 bool eline; /* previous line was empty */
757 bool fullline = true; /* current line is terminated */
758 bool prevfl; /* previous line was terminated */
761 char tmpbuf[sizeof _PATH_LOCTMP + 1];
767 (void) sm_strlcpy(tmpbuf, _PATH_LOCTMP, sizeof tmpbuf);
768 if ((fd = mkstemp(tmpbuf)) < 0 || (fp = fdopen(fd, "w+")) == NULL)
772 mailerr("451 4.3.0", "Unable to open temporary file");
775 (void) unlink(tmpbuf);
779 printf("354 Go ahead\r\n");
780 (void) fflush(stdout);
786 (void) fprintf(fp, "From %s %s", from, ctime(&tval));
791 #endif /* CONTENTLENGTH */
795 while (fgets(line, sizeof(line), stdin) != (char *) NULL)
800 prevfl = fullline; /* preserve state of previous line */
801 while (line[line_len] != '\n' && line_len < sizeof(line) - 2)
805 /* Check for dot-stuffing */
806 if (prevfl && LMTPMode && line[0] == '.')
808 if (line[1] == '\n' ||
809 (line[1] == '\r' && line[2] == '\n'))
811 memcpy(line, line + 1, line_len);
815 /* Check to see if we have the full line from fgets() */
819 if (line[line_len - 1] == '\n')
822 line[line_len - 2] == '\r')
824 line[line_len - 2] = '\n';
825 line[line_len - 1] = '\0';
830 else if (line[line_len - 1] == '\r')
832 /* Did we just miss the CRLF? */
836 line[line_len - 1] = '\n';
840 (void) ungetc(peek, stdin);
847 if (prevfl && line[0] == '\n' && HeaderLength == 0)
851 HeaderLength = ftell(fp);
852 if (HeaderLength <= 0)
855 ** shouldn't happen, unless ftell() is
862 #else /* CONTENTLENGTH */
863 if (prevfl && line[0] == '\n')
865 #endif /* CONTENTLENGTH */
868 if (eline && line[0] == 'F' &&
870 !memcmp(line, "From ", 5))
871 (void) putc('>', fp);
874 /* discard existing "Content-Length:" headers */
875 if (prevfl && HeaderLength == 0 &&
876 (line[0] == 'C' || line[0] == 'c') &&
877 sm_strncasecmp(line, ContentHdr, 15) == 0)
880 ** be paranoid: clear the line
881 ** so no "wrong matches" may occur later
886 #endif /* CONTENTLENGTH */
891 (void) fwrite(line, sizeof(char), line_len, fp);
895 "Temporary file write error");
903 /* check if an error occurred */
909 /* Got a premature EOF -- toss message and exit */
913 /* If message not newline terminated, need an extra. */
914 if (fp != NULL && strchr(line, '\n') == NULL)
915 (void) putc('\n', fp);
921 BodyLength = ftell(fp);
922 if (HeaderLength == 0 && BodyLength > 0) /* empty body */
924 HeaderLength = BodyLength;
928 BodyLength = BodyLength - HeaderLength - 1 ;
930 if (HeaderLength > 0 && BodyLength >= 0)
932 (void) sm_snprintf(line, sizeof line, "%lld\n",
933 (LONGLONG_T) BodyLength);
934 (void) sm_strlcpy(&ContentHdr[16], line,
935 sizeof(ContentHdr) - 16);
938 BodyLength = -1; /* Something is wrong here */
939 #endif /* CONTENTLENGTH */
941 /* Output a newline; note, empty messages are allowed. */
943 (void) putc('\n', fp);
945 if (fp == NULL || fflush(fp) == EOF || ferror(fp) != 0)
947 mailerr("451 4.3.0", "Temporary file write error");
962 char path[MAXPATHLEN];
963 int mbfd = -1, nr = 0, nw, off;
967 off_t curoff, cursize;
971 #endif /* CONTENTLENGTH */
972 char biffmsg[100], buf[8 * 1024];
976 ** Disallow delivery to unknown names -- special mailboxes can be
977 ** handled in the sendmail aliases file.
980 exitval = sm_mbdb_lookup(name, &user);
987 exitval = EX_UNAVAILABLE;
988 mailerr("550 5.1.1", "%s: User unknown", name);
992 mailerr("451 4.3.0", "%s: User database failure; retry later",
997 exitval = EX_UNAVAILABLE;
998 mailerr("550 5.3.0", "%s: User database failure", name);
1002 if (exitval != EX_OK)
1004 if (ExitVal != EX_TEMPFAIL)
1012 ** Keep name reasonably short to avoid buffer overruns.
1013 ** This isn't necessary on BSD because of the proper
1014 ** definition of snprintf(), but it can cause problems
1015 ** on other systems.
1016 ** Also, clear out any bogus characters.
1020 if (strlen(name) > 40)
1022 for (p = name; *p != '\0'; p++)
1026 else if (!isprint(*p))
1029 #endif /* !HASHSPOOL */
1032 if (HomeMailFile == NULL)
1034 if (sm_strlcpyn(path, sizeof(path),
1037 #else /* HASHSPOOL */
1039 #endif /* HASHSPOOL */
1043 #endif /* HASHSPOOL */
1044 name) >= sizeof(path))
1046 exitval = EX_UNAVAILABLE;
1047 mailerr("550 5.1.1", "%s: Invalid mailbox path", name);
1051 else if (*user.mbdb_homedir == '\0')
1053 exitval = EX_UNAVAILABLE;
1054 mailerr("550 5.1.1", "%s: User missing home directory", name);
1057 else if (sm_snprintf(path, sizeof(path), "%s/%s",
1058 user.mbdb_homedir, HomeMailFile) >= sizeof(path))
1060 exitval = EX_UNAVAILABLE;
1061 mailerr("550 5.1.1", "%s: Invalid mailbox path", name);
1067 ** If the mailbox is linked or a symlink, fail. There's an obvious
1068 ** race here, that the file was replaced with a symbolic link after
1069 ** the lstat returned, but before the open. We attempt to detect
1070 ** this by comparing the original stat information and information
1071 ** returned by an fstat of the file descriptor returned by the open.
1073 ** NB: this is a symptom of a larger problem, that the mail spooling
1074 ** directory is writeable by the wrong users. If that directory is
1075 ** writeable, system security is compromised for other reasons, and
1076 ** it cannot be fixed here.
1078 ** If we created the mailbox, set the owner/group. If that fails,
1079 ** just return. Another process may have already opened it, so we
1080 ** can't unlink it. Historically, binmail set the owner/group at
1081 ** each mail delivery. We no longer do this, assuming that if the
1082 ** ownership or permissions were changed there was a reason.
1085 ** open(2) should support flock'ing the file.
1091 #else /* MAILLOCK */
1093 #endif /* MAILLOCK */
1094 if ((off = lockmbox(p)) != 0)
1096 if (off == EX_TEMPFAIL || e_to_sys(off) == EX_TEMPFAIL)
1098 ExitVal = EX_TEMPFAIL;
1099 errcode = "451 4.3.0";
1102 errcode = "551 5.3.0";
1104 mailerr(errcode, "lockmailbox %s failed; error code %d %s",
1105 p, off, errno > 0 ? sm_errstring(errno) : "");
1109 if (lstat(path, &sb) < 0)
1112 int mode = S_IRUSR|S_IWUSR;
1113 gid_t gid = user.mbdb_gid;
1118 mode |= S_IRGRP|S_IWGRP;
1119 #endif /* MAILGID */
1121 mbfd = open(path, O_APPEND|O_CREAT|O_EXCL|O_WRONLY,
1125 if (lstat(path, &sb) < 0)
1127 ExitVal = EX_CANTCREAT;
1128 mailerr("550 5.2.0",
1129 "%s: lstat: file changed after open", path);
1134 if (save_errno == EEXIST)
1137 /* open failed, don't try again */
1138 mailerr("450 4.2.0", "%s: %s", path,
1139 sm_errstring(save_errno));
1142 else if (fchown(mbfd, user.mbdb_uid, gid) < 0)
1144 mailerr("451 4.3.0", "chown %u.%u: %s",
1145 user.mbdb_uid, gid, name);
1151 ** open() was successful, now close it so can
1152 ** be opened as the right owner again.
1153 ** Paranoia: reset mbdf since the file descriptor
1154 ** is no longer valid; better safe than sorry.
1157 sb.st_uid = user.mbdb_uid;
1162 else if (sb.st_nlink != 1)
1164 mailerr("550 5.2.0", "%s: too many links", path);
1167 else if (!S_ISREG(sb.st_mode))
1169 mailerr("550 5.2.0", "%s: irregular file", path);
1172 else if (sb.st_uid != user.mbdb_uid)
1174 ExitVal = EX_CANTCREAT;
1175 mailerr("550 5.2.0", "%s: wrong ownership (%d)",
1176 path, (int) sb.st_uid);
1180 /* change UID for quota checks */
1181 if (setreuid(0, user.mbdb_uid) < 0)
1183 mailerr("450 4.2.0", "setreuid(0, %d): %s (r=%d, e=%d)",
1184 (int) user.mbdb_uid, sm_errstring(errno),
1185 (int) getuid(), (int) geteuid());
1189 fprintf(stderr, "new euid = %d\n", (int) geteuid());
1191 mbfd = open(path, O_APPEND|O_WRONLY, 0);
1194 mailerr("450 4.2.0", "%s: %s", path, sm_errstring(errno));
1197 else if (fstat(mbfd, &fsb) < 0 ||
1198 fsb.st_nlink != 1 ||
1200 !S_ISREG(fsb.st_mode) ||
1201 sb.st_dev != fsb.st_dev ||
1202 sb.st_ino != fsb.st_ino ||
1203 # if HAS_ST_GEN && 0 /* AFS returns random values for st_gen */
1204 sb.st_gen != fsb.st_gen ||
1205 # endif /* HAS_ST_GEN && 0 */
1206 sb.st_uid != fsb.st_uid)
1208 ExitVal = EX_TEMPFAIL;
1209 mailerr("550 5.2.0", "%s: fstat: file changed after open",
1216 ** This code could be reused if we decide to add a
1217 ** per-user quota field to the sm_mbdb interface.
1221 ** Fail if the user has a quota specified, and delivery of this
1222 ** message would exceed that quota. We bounce such failures using
1223 ** EX_UNAVAILABLE, unless there were internal problems, since
1224 ** storing immense messages for later retries can cause queueing
1232 if (fstat(fd, &dsb) < 0)
1234 ExitVal = EX_TEMPFAIL;
1235 mailerr("451 4.3.0",
1236 "%s: fstat: can't stat temporary storage: %s",
1237 ui.mailspool, sm_errstring(errno));
1241 if (dsb.st_size + sb.st_size + 1 > ui.quota)
1243 ExitVal = EX_UNAVAILABLE;
1244 mailerr("551 5.2.2",
1245 "%s: Mailbox full or quota exceeded",
1252 /* Wait until we can get a lock on the file. */
1253 if (flock(mbfd, LOCK_EX) < 0)
1255 mailerr("450 4.2.0", "%s: %s", path, sm_errstring(errno));
1259 /* Get the starting offset of the new message */
1260 curoff = lseek(mbfd, (off_t) 0, SEEK_END);
1261 (void) sm_snprintf(biffmsg, sizeof(biffmsg), "%s@%lld\n",
1262 name, (LONGLONG_T) curoff);
1264 /* Copy the message into the file. */
1265 if (lseek(fd, (off_t) 0, SEEK_SET) == (off_t) -1)
1267 mailerr("450 4.2.0", "Temporary file: %s",
1268 sm_errstring(errno));
1272 fprintf(stderr, "before writing: euid = %d\n", (int) geteuid());
1274 #ifdef CONTENTLENGTH
1275 headerbytes = (BodyLength >= 0) ? HeaderLength : -1 ;
1278 if (headerbytes == 0)
1280 (void) sm_snprintf(buf, sizeof buf, "%s", ContentHdr);
1285 else if (headerbytes > sizeof(buf) || headerbytes < 0)
1286 readamount = sizeof(buf);
1288 readamount = headerbytes;
1289 if (readamount != 0)
1290 nr = read(fd, buf, readamount);
1293 if (headerbytes > 0)
1296 #else /* CONTENTLENGTH */
1297 while ((nr = read(fd, buf, sizeof(buf))) > 0)
1299 #endif /* CONTENTLENGTH */
1300 for (off = 0; off < nr; off += nw)
1302 if ((nw = write(mbfd, buf + off, nr - off)) < 0)
1304 errcode = "450 4.2.0";
1306 if (errno == EDQUOT && BounceQuota)
1307 errcode = "552 5.2.2";
1309 mailerr(errcode, "%s: %s",
1310 path, sm_errstring(errno));
1317 mailerr("450 4.2.0", "Temporary file: %s",
1318 sm_errstring(errno));
1322 /* Flush to disk, don't wait for update. */
1323 if (fsync(mbfd) < 0)
1325 mailerr("450 4.2.0", "%s: %s", path, sm_errstring(errno));
1328 fprintf(stderr, "reset euid = %d\n", (int) geteuid());
1331 (void) ftruncate(mbfd, curoff);
1332 err1: if (mbfd >= 0)
1334 err0: (void) setreuid(0, 0);
1340 ** Save the current size so if the close() fails below
1341 ** we can make sure no other process has changed the mailbox
1342 ** between the failed close and the re-open()/re-lock().
1343 ** If something else has changed the size, we shouldn't
1344 ** try to truncate it as we may do more harm then good
1345 ** (e.g., truncate a later message delivery).
1348 if (fstat(mbfd, &sb) < 0)
1351 cursize = sb.st_size;
1354 /* Close and check -- NFS doesn't write until the close. */
1357 errcode = "450 4.2.0";
1359 if (errno == EDQUOT && BounceQuota)
1360 errcode = "552 5.2.2";
1362 mailerr(errcode, "%s: %s", path, sm_errstring(errno));
1363 mbfd = open(path, O_WRONLY, 0);
1366 || flock(mbfd, LOCK_EX) < 0 ||
1367 fstat(mbfd, &sb) < 0 ||
1368 sb.st_size != cursize ||
1370 !S_ISREG(sb.st_mode) ||
1371 sb.st_dev != fsb.st_dev ||
1372 sb.st_ino != fsb.st_ino ||
1373 # if HAS_ST_GEN && 0 /* AFS returns random values for st_gen */
1374 sb.st_gen != fsb.st_gen ||
1375 # endif /* HAS_ST_GEN && 0 */
1376 sb.st_uid != fsb.st_uid
1379 /* Don't use a bogus file */
1387 /* Attempt to truncate back to pre-write size */
1391 notifybiff(biffmsg);
1393 if (setreuid(0, 0) < 0)
1395 mailerr("450 4.2.0", "setreuid(0, 0): %s",
1396 sm_errstring(errno));
1400 fprintf(stderr, "reset euid = %d\n", (int) geteuid());
1404 printf("250 2.1.5 %s Ok\r\n", name);
1408 ** user.lock files are necessary for compatibility with other
1409 ** systems, e.g., when the mail spool file is NFS exported.
1410 ** Alas, mailbox locking is more than just a local matter.
1414 bool Locked = false;
1425 if ((r = maillock(name, 15)) == L_SUCCESS)
1432 case L_TMPLOCK: /* Can't create tmp file */
1433 case L_TMPWRITE: /* Can't write pid into lockfile */
1434 case L_MAXTRYS: /* Failed after retrycnt attempts */
1438 case L_ERROR: /* Check errno for reason */
1441 default: /* other permanent errors */
1456 #else /* MAILLOCK */
1458 char LockName[MAXPATHLEN];
1469 if (strlen(path) + 6 > sizeof LockName)
1471 (void) sm_snprintf(LockName, sizeof LockName, "%s.lock", path);
1472 (void) time(&start);
1479 /* global timeout */
1481 if (now > start + LOCKTO_GLOB)
1486 fd = open(LockName, O_WRONLY|O_EXCL|O_CREAT, LOCKFILE_PMODE);
1489 /* defeat lock checking programs which test pid */
1490 (void) write(fd, "0", 2);
1495 if (stat(LockName, &st) < 0)
1497 if (statfailed++ > 5)
1506 if (now < st.st_ctime + LOCKTO_RM)
1509 /* try to remove stale lockfile */
1510 if (unlink(LockName) < 0)
1520 (void) unlink(LockName);
1523 #endif /* MAILLOCK */
1529 static bool initialized = false;
1534 static struct sockaddr_in addr;
1540 /* Be silent if biff service not available. */
1541 if ((sp = getservbyname("biff", "udp")) == NULL ||
1542 (hp = gethostbyname("localhost")) == NULL ||
1543 hp->h_length != INADDRSZ)
1546 addr.sin_family = hp->h_addrtype;
1547 memcpy(&addr.sin_addr, hp->h_addr, INADDRSZ);
1548 addr.sin_port = sp->s_port;
1551 /* No message, just return */
1555 /* Couldn't initialize addr struct */
1556 if (addr.sin_family == AF_UNSPEC)
1559 if (f < 0 && (f = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
1561 len = strlen(msg) + 1;
1562 (void) sendto(f, msg, len, 0, (struct sockaddr *) &addr, sizeof(addr));
1569 mailerr(NULL, "usage: mail.local [-7] [-b] [-d] [-l] [-f from|-r from] [-h filename] user ...");
1576 mailerr(const char *hdr, const char *fmt, ...)
1577 #else /* __STDC__ */
1578 mailerr(hdr, fmt, va_alist)
1582 #endif /* __STDC__ */
1587 (void) e_to_sys(errno);
1589 SM_VA_START(ap, fmt);
1591 if (LMTPMode && hdr != NULL)
1593 sm_snprintf(ErrBuf, sizeof ErrBuf, "%s ", hdr);
1594 len = strlen(ErrBuf);
1596 (void) sm_vsnprintf(&ErrBuf[len], sizeof ErrBuf - len, fmt, ap);
1602 /* Log the message to syslog. */
1604 syslog(LOG_ERR, "%s", ErrBuf);
1611 printf("%s\r\n", ErrBuf);
1614 if (ExitVal != EX_USAGE)
1615 (void) fprintf(stderr, "mail.local: ");
1616 fprintf(stderr, "%s\n", ErrBuf);
1625 static char p[MAXPATHLEN];
1630 char Base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+_";
1632 unsigned char md5[18];
1633 # if MAXPATHLEN <= 24
1634 ERROR _MAXPATHLEN <= 24
1635 # endif /* MAXPATHLEN <= 24 */
1639 # endif /* HASHSPOOLMD5 */
1641 if (HashType == HASH_NONE || HashDepth * 2 >= MAXPATHLEN)
1656 MD5_Update(&ctx, name, strlen(name));
1657 MD5_Final(md5, &ctx);
1661 for (i = 0; i < 6; i++)
1663 bits = (unsigned) md5[(3 * i)] << 16;
1664 bits |= (unsigned) md5[(3 * i) + 1] << 8;
1665 bits |= (unsigned) md5[(3 * i) + 2];
1667 for (j = 3; j >= 0; j--)
1669 b64[(4 * i) + j] = Base64[(bits & 0x3f)];
1676 # endif /* HASHSPOOLMD5 */
1680 for (i = 0; i < HashDepth; i++)
1686 p[(i * 2) + 1] = '/';
1688 p[HashDepth * 2] = '\0';
1691 #endif /* HASHSPOOL */
1695 * Guess which errno's are temporary. Gag me.
1702 /* Temporary failures override hard errors. */
1703 if (ExitVal == EX_TEMPFAIL)
1706 switch (num) /* Hopefully temporary errors. */
1709 case EDQUOT: /* Disc quota exceeded */
1712 ExitVal = EX_UNAVAILABLE;
1718 case EAGAIN: /* Resource temporarily unavailable */
1721 case EBUSY: /* Device busy */
1724 case EPROCLIM: /* Too many processes */
1725 #endif /* EPROCLIM */
1727 case EUSERS: /* Too many users */
1730 case ECONNABORTED: /* Software caused connection abort */
1731 #endif /* ECONNABORTED */
1733 case ECONNREFUSED: /* Connection refused */
1734 #endif /* ECONNREFUSED */
1736 case ECONNRESET: /* Connection reset by peer */
1737 #endif /* ECONNRESET */
1739 case EDEADLK: /* Resource deadlock avoided */
1740 #endif /* EDEADLK */
1742 case EFBIG: /* File too large */
1745 case EHOSTDOWN: /* Host is down */
1746 #endif /* EHOSTDOWN */
1748 case EHOSTUNREACH: /* No route to host */
1749 #endif /* EHOSTUNREACH */
1751 case EMFILE: /* Too many open files */
1754 case ENETDOWN: /* Network is down */
1755 #endif /* ENETDOWN */
1757 case ENETRESET: /* Network dropped connection on reset */
1758 #endif /* ENETRESET */
1760 case ENETUNREACH: /* Network is unreachable */
1761 #endif /* ENETUNREACH */
1763 case ENFILE: /* Too many open files in system */
1766 case ENOBUFS: /* No buffer space available */
1767 #endif /* ENOBUFS */
1769 case ENOMEM: /* Cannot allocate memory */
1772 case ENOSPC: /* No space left on device */
1775 case EROFS: /* Read-only file system */
1778 case ESTALE: /* Stale NFS file handle */
1781 case ETIMEDOUT: /* Connection timed out */
1782 #endif /* ETIMEDOUT */
1783 #if defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN && EWOULDBLOCK != EDEADLK
1784 case EWOULDBLOCK: /* Operation would block. */
1785 #endif /* defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN && EWOULDBLOCK != EDEADLK */
1786 ExitVal = EX_TEMPFAIL;
1790 ExitVal = EX_UNAVAILABLE;
1796 #if defined(ultrix) || defined(_CRAY)
1798 * Copyright (c) 1987, 1993
1799 * The Regents of the University of California. All rights reserved.
1801 * Redistribution and use in source and binary forms, with or without
1802 * modification, are permitted provided that the following conditions
1804 * 1. Redistributions of source code must retain the above copyright
1805 * notice, this list of conditions and the following disclaimer.
1806 * 2. Redistributions in binary form must reproduce the above copyright
1807 * notice, this list of conditions and the following disclaimer in the
1808 * documentation and/or other materials provided with the distribution.
1809 * 3. All advertising materials mentioning features or use of this software
1810 * must display the following acknowledgement:
1811 * This product includes software developed by the University of
1812 * California, Berkeley and its contributors.
1813 * 4. Neither the name of the University nor the names of its contributors
1814 * may be used to endorse or promote products derived from this software
1815 * without specific prior written permission.
1817 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
1818 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1819 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1820 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
1821 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
1822 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
1823 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
1824 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
1825 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
1826 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
1830 # if defined(LIBC_SCCS) && !defined(lint)
1831 static char sccsid[] = "@(#)mktemp.c 8.1 (Berkeley) 6/4/93";
1832 # endif /* defined(LIBC_SCCS) && !defined(lint) */
1834 # include <sys/types.h>
1835 # include <sys/stat.h>
1841 static int _gettemp();
1848 return (_gettemp(path, &fd) ? fd : -1);
1852 _gettemp(path, doopen)
1854 register int *doopen;
1857 register char *start, *trv;
1862 for (trv = path; *trv; ++trv); /* extra X's get set to 0's */
1863 while (*--trv == 'X')
1865 *trv = (pid % 10) + '0';
1870 * check the target directory; if you have six X's and it
1871 * doesn't exist this runs for a *very* long time.
1873 for (start = trv + 1;; --trv)
1880 if (stat(path, &sbuf) < 0)
1882 if (!S_ISDIR(sbuf.st_mode))
1896 if ((*doopen = open(path, O_CREAT|O_EXCL|O_RDWR,
1899 if (errno != EEXIST)
1902 else if (stat(path, &sbuf) < 0)
1903 return(errno == ENOENT ? 1 : 0);
1905 /* tricky little algorithm for backward compatibility */
1914 if (isascii(*trv) && isdigit(*trv))
1924 #endif /* defined(ultrix) || defined(_CRAY) */