mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-29 12:03:03 +00:00
437 lines
10 KiB
C
437 lines
10 KiB
C
/*
|
|
* Copyright (c) 1998 Sendmail, Inc. All rights reserved.
|
|
* Copyright (c) 1988, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* By using this file, you agree to the terms and conditions set
|
|
* forth in the LICENSE file which can be found at the top level of
|
|
* the sendmail distribution.
|
|
*
|
|
*/
|
|
|
|
#ifndef lint
|
|
static char copyright[] =
|
|
"@(#) Copyright (c) 1988, 1993\n\
|
|
The Regents of the University of California. All rights reserved.\n";
|
|
#endif /* not lint */
|
|
|
|
#ifndef lint
|
|
static char sccsid[] = "@(#)rmail.c 8.17 (Berkeley) 5/19/98";
|
|
#endif /* not lint */
|
|
|
|
/*
|
|
* RMAIL -- UUCP mail server.
|
|
*
|
|
* This program reads the >From ... remote from ... lines that UUCP is so
|
|
* fond of and turns them into something reasonable. It then execs sendmail
|
|
* with various options built from these lines.
|
|
*
|
|
* The expected syntax is:
|
|
*
|
|
* <user> := [-a-z0-9]+
|
|
* <date> := ctime format
|
|
* <site> := [-a-z0-9!]+
|
|
* <blank line> := "^\n$"
|
|
* <from> := "From" <space> <user> <space> <date>
|
|
* [<space> "remote from" <space> <site>]
|
|
* <forward> := ">" <from>
|
|
* msg := <from> <forward>* <blank-line> <body>
|
|
*
|
|
* The output of rmail(8) compresses the <forward> lines into a single
|
|
* from path.
|
|
*
|
|
* The err(3) routine is included here deliberately to make this code
|
|
* a bit more portable.
|
|
*/
|
|
#include <sys/param.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/wait.h>
|
|
|
|
#include <ctype.h>
|
|
#include <fcntl.h>
|
|
#ifdef BSD4_4
|
|
# define FORK vfork
|
|
# include <paths.h>
|
|
#else
|
|
# define FORK fork
|
|
# ifndef _PATH_SENDMAIL
|
|
# define _PATH_SENDMAIL "/usr/lib/sendmail"
|
|
# endif
|
|
#endif
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#ifdef EX_OK
|
|
# undef EX_OK /* unistd.h may have another use for this */
|
|
#endif
|
|
#include <sysexits.h>
|
|
|
|
#ifndef MAX
|
|
# define MAX(a, b) ((a) < (b) ? (b) : (a))
|
|
#endif
|
|
|
|
#ifndef __P
|
|
# ifdef __STDC__
|
|
# define __P(protos) protos
|
|
# else
|
|
# define __P(protos) ()
|
|
# define const
|
|
# endif
|
|
#endif
|
|
|
|
#if defined(BSD4_4) || defined(linux) || SOLARIS >= 20600 || (SOLARIS < 10000 && SOLARIS >= 206)
|
|
# define HASSNPRINTF 1
|
|
#endif
|
|
|
|
#if defined(IRIX64) || defined(IRIX5) || defined(IRIX6) || \
|
|
defined(BSD4_4) || defined(__osf__) || defined(__GNU_LIBRARY__)
|
|
# ifndef HASSTRERROR
|
|
# define HASSTRERROR 1 /* has strerror(3) */
|
|
# endif
|
|
#endif
|
|
|
|
#if !HASSTRERROR
|
|
extern char *strerror __P((int));
|
|
#endif
|
|
|
|
#if defined(sun) && !defined(BSD) && !defined(SOLARIS) && !defined(__svr4__) && !defined(__SVR4)
|
|
# define memmove(d, s, l) (bcopy((s), (d), (l)))
|
|
#endif
|
|
|
|
#if !HASSNPRINTF
|
|
extern int snprintf __P((char *, size_t, const char *, ...));
|
|
#endif /* !HASSNPRINTF */
|
|
|
|
u_char tTdvect[100];
|
|
|
|
void err __P((int, const char *, ...));
|
|
void usage __P((void));
|
|
char *xalloc __P((int));
|
|
|
|
#define newstr(s) strcpy(xalloc(strlen(s) + 1), s)
|
|
|
|
char *
|
|
xalloc(sz)
|
|
register int sz;
|
|
{
|
|
register char *p;
|
|
|
|
/* some systems can't handle size zero mallocs */
|
|
if (sz <= 0)
|
|
sz = 1;
|
|
|
|
p = malloc((unsigned) sz);
|
|
if (p == NULL)
|
|
err(EX_TEMPFAIL, "out of memory");
|
|
return (p);
|
|
}
|
|
|
|
int
|
|
main(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
extern char *optarg;
|
|
extern int errno, optind;
|
|
FILE *fp;
|
|
struct stat sb;
|
|
size_t fplen, fptlen, len;
|
|
off_t offset;
|
|
int ch, debug, i, pdes[2], pid, status;
|
|
char *addrp, *domain, *p, *t;
|
|
char *from_path, *from_sys, *from_user;
|
|
char *args[100], buf[2048], lbuf[2048];
|
|
|
|
debug = 0;
|
|
domain = "UUCP"; /* Default "domain". */
|
|
while ((ch = getopt(argc, argv, "D:T")) != -1)
|
|
switch (ch) {
|
|
case 'T':
|
|
debug = 1;
|
|
break;
|
|
case 'D':
|
|
domain = optarg;
|
|
break;
|
|
case '?':
|
|
default:
|
|
usage();
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
if (argc < 1)
|
|
usage();
|
|
|
|
fplen = fptlen = 0;
|
|
addrp = "";
|
|
from_path = from_sys = from_user = NULL;
|
|
for (offset = 0;;) {
|
|
|
|
/* Get and nul-terminate the line. */
|
|
if (fgets(lbuf, sizeof(lbuf), stdin) == NULL)
|
|
exit (EX_DATAERR);
|
|
if ((p = strchr(lbuf, '\n')) == NULL)
|
|
err(EX_DATAERR, "line too long");
|
|
*p = '\0';
|
|
|
|
/* Parse lines until reach a non-"From" line. */
|
|
if (!strncmp(lbuf, "From ", 5))
|
|
addrp = lbuf + 5;
|
|
else if (!strncmp(lbuf, ">From ", 6))
|
|
addrp = lbuf + 6;
|
|
else if (offset == 0)
|
|
err(EX_DATAERR,
|
|
"missing or empty From line: %s", lbuf);
|
|
else {
|
|
*p = '\n';
|
|
break;
|
|
}
|
|
|
|
if (*addrp == '\0')
|
|
err(EX_DATAERR, "corrupted From line: %s", lbuf);
|
|
|
|
/* Use the "remote from" if it exists. */
|
|
for (p = addrp; (p = strchr(p + 1, 'r')) != NULL;)
|
|
if (!strncmp(p, "remote from ", 12)) {
|
|
for (t = p += 12;
|
|
*t && !(isascii(*t) && isspace(*t)); ++t);
|
|
*t = '\0';
|
|
if (debug)
|
|
(void)fprintf(stderr,
|
|
"remote from: %s\n", p);
|
|
break;
|
|
}
|
|
|
|
/* Else use the string up to the last bang. */
|
|
if (p == NULL) {
|
|
if (*addrp == '!')
|
|
err(EX_DATAERR,
|
|
"bang starts address: %s", addrp);
|
|
else if ((t = strrchr(addrp, '!')) != NULL) {
|
|
*t = '\0';
|
|
p = addrp;
|
|
addrp = t + 1;
|
|
if (*addrp == '\0')
|
|
err(EX_DATAERR,
|
|
"corrupted From line: %s", lbuf);
|
|
if (debug)
|
|
(void)fprintf(stderr, "bang: %s\n", p);
|
|
}
|
|
}
|
|
/* 'p' now points to any system string from this line. */
|
|
if (p != NULL) {
|
|
/* Nul terminate it as necessary. */
|
|
for (t = p; *t && !(isascii(*t) && isspace(*t)); ++t);
|
|
*t = '\0';
|
|
|
|
/* If the first system, copy to the from_sys string. */
|
|
if (from_sys == NULL) {
|
|
from_sys = newstr(p);
|
|
if (debug)
|
|
(void)fprintf(stderr,
|
|
"from_sys: %s\n", from_sys);
|
|
}
|
|
|
|
/* Concatenate to the path string. */
|
|
len = t - p;
|
|
if (from_path == NULL) {
|
|
fplen = 0;
|
|
if ((from_path = malloc(fptlen = 256)) == NULL)
|
|
err(EX_TEMPFAIL, NULL);
|
|
}
|
|
if (fplen + len + 2 > fptlen) {
|
|
fptlen += MAX(fplen + len + 2, 256);
|
|
if ((from_path =
|
|
realloc(from_path, fptlen)) == NULL)
|
|
err(EX_TEMPFAIL, NULL);
|
|
}
|
|
memmove(from_path + fplen, p, len);
|
|
fplen += len;
|
|
from_path[fplen++] = '!';
|
|
from_path[fplen] = '\0';
|
|
}
|
|
|
|
/* Save off from user's address; the last one wins. */
|
|
for (p = addrp; *p && !(isascii(*p) && isspace(*p)); ++p);
|
|
*p = '\0';
|
|
if (*addrp == '\0')
|
|
addrp = "<>";
|
|
if (from_user != NULL)
|
|
free(from_user);
|
|
from_user = newstr(addrp);
|
|
|
|
if (debug) {
|
|
if (from_path != NULL)
|
|
(void)fprintf(stderr,
|
|
"from_path: %s\n", from_path);
|
|
(void)fprintf(stderr, "from_user: %s\n", from_user);
|
|
}
|
|
|
|
if (offset != -1)
|
|
offset = (off_t)ftell(stdin);
|
|
}
|
|
|
|
i = 0;
|
|
args[i++] = _PATH_SENDMAIL; /* Build sendmail's argument list. */
|
|
args[i++] = "-oee"; /* No errors, just status. */
|
|
#ifdef QUEUE_ONLY
|
|
args[i++] = "-odq"; /* Queue it, don't try to deliver. */
|
|
#else
|
|
args[i++] = "-odi"; /* Deliver in foreground. */
|
|
#endif
|
|
args[i++] = "-oi"; /* Ignore '.' on a line by itself. */
|
|
|
|
/* set from system and protocol used */
|
|
if (from_sys == NULL)
|
|
(void)snprintf(buf, sizeof(buf), "-p%s", domain);
|
|
else if (strchr(from_sys, '.') == NULL)
|
|
(void)snprintf(buf, sizeof(buf), "-p%s:%s.%s",
|
|
domain, from_sys, domain);
|
|
else
|
|
(void)snprintf(buf, sizeof(buf), "-p%s:%s", domain, from_sys);
|
|
args[i++] = newstr(buf);
|
|
|
|
/* Set name of ``from'' person. */
|
|
(void)snprintf(buf, sizeof(buf), "-f%s%s",
|
|
from_path ? from_path : "", from_user);
|
|
args[i++] = newstr(buf);
|
|
|
|
/*
|
|
* Don't copy arguments beginning with - as they will be
|
|
* passed to sendmail and could be interpreted as flags.
|
|
* To prevent confusion of sendmail wrap < and > around
|
|
* the address (helps to pass addrs like @gw1,@gw2:aa@bb)
|
|
*/
|
|
while (*argv) {
|
|
if (**argv == '-')
|
|
err(EX_USAGE, "dash precedes argument: %s", *argv);
|
|
if (strchr(*argv, ',') == NULL || strchr(*argv, '<') != NULL)
|
|
args[i++] = *argv;
|
|
else {
|
|
if ((args[i] = malloc(strlen(*argv) + 3)) == NULL)
|
|
err(EX_TEMPFAIL, "Cannot malloc");
|
|
sprintf (args [i++], "<%s>", *argv);
|
|
}
|
|
argv++;
|
|
}
|
|
args[i] = 0;
|
|
|
|
if (debug) {
|
|
(void)fprintf(stderr, "Sendmail arguments:\n");
|
|
for (i = 0; args[i]; i++)
|
|
(void)fprintf(stderr, "\t%s\n", args[i]);
|
|
}
|
|
|
|
/*
|
|
* If called with a regular file as standard input, seek to the right
|
|
* position in the file and just exec sendmail. Could probably skip
|
|
* skip the stat, but it's not unreasonable to believe that a failed
|
|
* seek will cause future reads to fail.
|
|
*/
|
|
if (!fstat(STDIN_FILENO, &sb) && S_ISREG(sb.st_mode)) {
|
|
if (lseek(STDIN_FILENO, offset, SEEK_SET) != offset)
|
|
err(EX_TEMPFAIL, "stdin seek");
|
|
execv(_PATH_SENDMAIL, args);
|
|
err(EX_OSERR, "%s", _PATH_SENDMAIL);
|
|
}
|
|
|
|
if (pipe(pdes) < 0)
|
|
err(EX_OSERR, NULL);
|
|
|
|
switch (pid = FORK()) {
|
|
case -1: /* Err. */
|
|
err(EX_OSERR, NULL);
|
|
case 0: /* Child. */
|
|
if (pdes[0] != STDIN_FILENO) {
|
|
(void)dup2(pdes[0], STDIN_FILENO);
|
|
(void)close(pdes[0]);
|
|
}
|
|
(void)close(pdes[1]);
|
|
execv(_PATH_SENDMAIL, args);
|
|
_exit(127);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
if ((fp = fdopen(pdes[1], "w")) == NULL)
|
|
err(EX_OSERR, NULL);
|
|
(void)close(pdes[0]);
|
|
|
|
/* Copy the file down the pipe. */
|
|
do {
|
|
(void)fprintf(fp, "%s", lbuf);
|
|
} while (fgets(lbuf, sizeof(lbuf), stdin) != NULL);
|
|
|
|
if (ferror(stdin))
|
|
err(EX_TEMPFAIL, "stdin: %s", strerror(errno));
|
|
|
|
if (fclose(fp))
|
|
err(EX_OSERR, NULL);
|
|
|
|
if ((waitpid(pid, &status, 0)) == -1)
|
|
err(EX_OSERR, "%s", _PATH_SENDMAIL);
|
|
|
|
if (!WIFEXITED(status))
|
|
err(EX_OSERR,
|
|
"%s: did not terminate normally", _PATH_SENDMAIL);
|
|
|
|
if (WEXITSTATUS(status))
|
|
err(status, "%s: terminated with %d (non-zero) status",
|
|
_PATH_SENDMAIL, WEXITSTATUS(status));
|
|
exit(EX_OK);
|
|
}
|
|
|
|
void
|
|
usage()
|
|
{
|
|
(void)fprintf(stderr, "usage: rmail [-T] [-D domain] user ...\n");
|
|
exit(EX_USAGE);
|
|
}
|
|
|
|
#ifdef __STDC__
|
|
#include <stdarg.h>
|
|
#else
|
|
#include <varargs.h>
|
|
#endif
|
|
|
|
void
|
|
#ifdef __STDC__
|
|
err(int eval, const char *fmt, ...)
|
|
#else
|
|
err(eval, fmt, va_alist)
|
|
int eval;
|
|
const char *fmt;
|
|
va_dcl
|
|
#endif
|
|
{
|
|
va_list ap;
|
|
#if __STDC__
|
|
va_start(ap, fmt);
|
|
#else
|
|
va_start(ap);
|
|
#endif
|
|
(void)fprintf(stderr, "rmail: ");
|
|
(void)vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
(void)fprintf(stderr, "\n");
|
|
exit(eval);
|
|
}
|
|
|
|
#if !HASSTRERROR
|
|
|
|
char *
|
|
strerror(eno)
|
|
int eno;
|
|
{
|
|
extern int sys_nerr;
|
|
extern char *sys_errlist[];
|
|
static char ebuf[60];
|
|
|
|
if (eno >= 0 && eno < sys_nerr)
|
|
return sys_errlist[eno];
|
|
(void) sprintf(ebuf, "Error %d", eno);
|
|
return ebuf;
|
|
}
|
|
|
|
#endif /* !HASSTRERROR */
|