2 * Copyright (c) 1998-2001 Sendmail, Inc. and its suppliers.
4 * Copyright (c) 1988, 1993
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) 1998-2001 Sendmail, Inc. and its suppliers.\n\
17 All rights reserved.\n\
18 Copyright (c) 1988, 1993\n\
19 The Regents of the University of California. All rights reserved.\n")
21 SM_IDSTR(id
, "@(#)$Id: rmail.c,v 8.61 2001/09/18 21:45:29 gshapiro Exp $")
24 * RMAIL -- UUCP mail server.
26 * This program reads the >From ... remote from ... lines that UUCP is so
27 * fond of and turns them into something reasonable. It then execs sendmail
28 * with various options built from these lines.
30 * The expected syntax is:
32 * <user> := [-a-z0-9]+
33 * <date> := ctime format
34 * <site> := [-a-z0-9!]+
35 * <blank line> := "^\n$"
36 * <from> := "From" <space> <user> <space> <date>
37 * [<space> "remote from" <space> <site>]
38 * <forward> := ">" <from>
39 * msg := <from> <forward>* <blank-line> <body>
41 * The output of rmail(8) compresses the <forward> lines into a single
44 * The err(3) routine is included here deliberately to make this code
45 * a bit more portable.
48 #include <sys/types.h>
49 #include <sys/param.h>
57 #include <sm/string.h>
60 # undef EX_OK /* unistd.h may have another use for this */
65 #include <sm/errstring.h>
66 #include <sendmail/pathnames.h>
68 static void err
__P((int, const char *, ...));
69 static void usage
__P((void));
70 static char *xalloc
__P((int));
72 #define newstr(s) strcpy(xalloc(strlen(s) + 1), s)
80 /* some systems can't handle size zero mallocs */
86 err(EX_TEMPFAIL
, "out of memory");
95 int ch
, debug
, i
, pdes
[2], pid
, status
;
96 size_t fplen
= 0, fptlen
= 0, len
;
99 char *addrp
= NULL
, *domain
, *p
, *t
;
100 char *from_path
, *from_sys
, *from_user
;
101 char **args
, buf
[2048], lbuf
[2048];
107 domain
= "UUCP"; /* Default "domain". */
108 while ((ch
= getopt(argc
, argv
, "D:T")) != -1)
132 from_path
= from_sys
= from_user
= NULL
;
135 /* Get and nul-terminate the line. */
136 if (sm_io_fgets(smioin
, SM_TIME_DEFAULT
, lbuf
,
137 sizeof(lbuf
)) == NULL
)
138 err(EX_DATAERR
, "no data");
139 if ((p
= strchr(lbuf
, '\n')) == NULL
)
140 err(EX_DATAERR
, "line too long");
143 /* Parse lines until reach a non-"From" line. */
144 if (!strncmp(lbuf
, "From ", 5))
146 else if (!strncmp(lbuf
, ">From ", 6))
148 else if (offset
== 0)
150 "missing or empty From line: %s", lbuf
);
157 if (addrp
== NULL
|| *addrp
== '\0')
158 err(EX_DATAERR
, "corrupted From line: %s", lbuf
);
160 /* Use the "remote from" if it exists. */
161 for (p
= addrp
; (p
= strchr(p
+ 1, 'r')) != NULL
; )
163 if (!strncmp(p
, "remote from ", 12))
165 for (t
= p
+= 12; *t
!= '\0'; ++t
)
167 if (isascii(*t
) && isspace(*t
))
172 (void) sm_io_fprintf(smioerr
,
180 /* Else use the string up to the last bang. */
184 err(EX_DATAERR
, "bang starts address: %s",
186 else if ((t
= strrchr(addrp
, '!')) != NULL
)
193 "corrupted From line: %s", lbuf
);
195 (void) sm_io_fprintf(smioerr
,
201 /* 'p' now points to any system string from this line. */
204 /* Nul terminate it as necessary. */
205 for (t
= p
; *t
!= '\0'; ++t
)
207 if (isascii(*t
) && isspace(*t
))
212 /* If the first system, copy to the from_sys string. */
213 if (from_sys
== NULL
)
215 from_sys
= newstr(p
);
217 (void) sm_io_fprintf(smioerr
,
223 /* Concatenate to the path string. */
225 if (from_path
== NULL
)
228 if ((from_path
= malloc(fptlen
= 256)) == NULL
)
229 err(EX_TEMPFAIL
, "out of memory");
231 if (fplen
+ len
+ 2 > fptlen
)
233 fptlen
+= SM_MAX(fplen
+ len
+ 2, 256);
234 if ((from_path
= realloc(from_path
,
236 err(EX_TEMPFAIL
, "out of memory");
238 memmove(from_path
+ fplen
, p
, len
);
240 from_path
[fplen
++] = '!';
241 from_path
[fplen
] = '\0';
244 /* Save off from user's address; the last one wins. */
245 for (p
= addrp
; *p
!= '\0'; ++p
)
247 if (isascii(*p
) && isspace(*p
))
253 if (from_user
!= NULL
)
255 from_user
= newstr(addrp
);
259 if (from_path
!= NULL
)
260 (void) sm_io_fprintf(smioerr
, SM_TIME_DEFAULT
,
263 (void) sm_io_fprintf(smioerr
, SM_TIME_DEFAULT
,
264 "from_user: %s\n", from_user
);
268 offset
= (off_t
)sm_io_tell(smioin
, SM_TIME_DEFAULT
);
272 /* Allocate args (with room for sendmail args as well as recipients */
273 args
= (char **)xalloc(sizeof(*args
) * (10 + argc
));
276 args
[i
++] = _PATH_SENDMAIL
; /* Build sendmail's argument list. */
277 args
[i
++] = "-G"; /* relay submission */
278 args
[i
++] = "-oee"; /* No errors, just status. */
279 args
[i
++] = "-odq"; /* Queue it, don't try to deliver. */
280 args
[i
++] = "-oi"; /* Ignore '.' on a line by itself. */
282 /* set from system and protocol used */
283 if (from_sys
== NULL
)
284 sm_snprintf(buf
, sizeof(buf
), "-p%s", domain
);
285 else if (strchr(from_sys
, '.') == NULL
)
286 sm_snprintf(buf
, sizeof(buf
), "-p%s:%s.%s",
287 domain
, from_sys
, domain
);
289 sm_snprintf(buf
, sizeof(buf
), "-p%s:%s", domain
, from_sys
);
290 args
[i
++] = newstr(buf
);
292 /* Set name of ``from'' person. */
293 sm_snprintf(buf
, sizeof(buf
), "-f%s%s",
294 from_path
? from_path
: "", from_user
);
295 args
[i
++] = newstr(buf
);
298 ** Don't copy arguments beginning with - as they will be
299 ** passed to sendmail and could be interpreted as flags.
300 ** To prevent confusion of sendmail wrap < and > around
301 ** the address (helps to pass addrs like @gw1,@gw2:aa@bb)
304 while (*argv
!= NULL
)
307 err(EX_USAGE
, "dash precedes argument: %s", *argv
);
309 if (strchr(*argv
, ',') == NULL
|| strchr(*argv
, '<') != NULL
)
313 len
= strlen(*argv
) + 3;
314 if ((args
[i
] = malloc(len
)) == NULL
)
315 err(EX_TEMPFAIL
, "Cannot malloc");
316 sm_snprintf(args
[i
++], len
, "<%s>", *argv
);
321 /* Paranoia check, argc used for args[] bound */
323 err(EX_SOFTWARE
, "Argument count mismatch");
329 (void) sm_io_fprintf(smioerr
, SM_TIME_DEFAULT
,
330 "Sendmail arguments:\n");
331 for (i
= 0; args
[i
] != NULL
; i
++)
332 (void) sm_io_fprintf(smioerr
, SM_TIME_DEFAULT
,
337 ** If called with a regular file as standard input, seek to the right
338 ** position in the file and just exec sendmail. Could probably skip
339 ** skip the stat, but it's not unreasonable to believe that a failed
340 ** seek will cause future reads to fail.
343 if (!fstat(STDIN_FILENO
, &sb
) && S_ISREG(sb
.st_mode
))
345 if (lseek(STDIN_FILENO
, offset
, SEEK_SET
) != offset
)
346 err(EX_TEMPFAIL
, "stdin seek");
347 (void) execv(_PATH_SENDMAIL
, args
);
348 err(EX_OSERR
, "%s", _PATH_SENDMAIL
);
352 err(EX_OSERR
, "pipe failed");
354 switch (pid
= fork())
357 err(EX_OSERR
, "fork failed");
361 if (pdes
[0] != STDIN_FILENO
)
363 (void) dup2(pdes
[0], STDIN_FILENO
);
364 (void) close(pdes
[0]);
366 (void) close(pdes
[1]);
367 (void) execv(_PATH_SENDMAIL
, args
);
368 err(EX_UNAVAILABLE
, "%s", _PATH_SENDMAIL
);
372 if ((fp
= sm_io_open(SmFtStdiofd
, SM_TIME_DEFAULT
, (void *) &(pdes
[1]),
373 SM_IO_WRONLY
, NULL
)) == NULL
)
374 err(EX_OSERR
, "sm_io_open failed");
375 (void) close(pdes
[0]);
377 /* Copy the file down the pipe. */
380 (void) sm_io_fprintf(fp
, SM_TIME_DEFAULT
, "%s", lbuf
);
381 } while (sm_io_fgets(smioin
, SM_TIME_DEFAULT
, lbuf
,
382 sizeof(lbuf
)) != NULL
);
384 if (sm_io_error(smioin
))
385 err(EX_TEMPFAIL
, "stdin: %s", sm_errstring(errno
));
387 if (sm_io_close(fp
, SM_TIME_DEFAULT
))
388 err(EX_OSERR
, "sm_io_close failed");
390 if ((waitpid(pid
, &status
, 0)) == -1)
391 err(EX_OSERR
, "%s", _PATH_SENDMAIL
);
393 if (!WIFEXITED(status
))
394 err(EX_OSERR
, "%s: did not terminate normally", _PATH_SENDMAIL
);
396 if (WEXITSTATUS(status
))
397 err(status
, "%s: terminated with %d (non-zero) status",
398 _PATH_SENDMAIL
, WEXITSTATUS(status
));
407 (void) sm_io_fprintf(smioerr
, SM_TIME_DEFAULT
,
408 "usage: rmail [-T] [-D domain] user ...\n");
414 err(int eval
, const char *fmt
, ...)
416 err(eval
, fmt
, va_alist
)
420 #endif /* __STDC__ */
426 SM_VA_START(ap
, fmt
);
427 (void) sm_io_fprintf(smioerr
, SM_TIME_DEFAULT
, "rmail: ");
428 (void) sm_io_vfprintf(smioerr
, SM_TIME_DEFAULT
, fmt
, ap
);
430 (void) sm_io_fprintf(smioerr
, SM_TIME_DEFAULT
, "\n");