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This commit was manufactured by cvs2svn to create tag 'FreeBSD-release/1.0'.
[unix-history] / usr.sbin / sendmail / src / main.c
/*
* Copyright (c) 1983 Eric P. Allman
* Copyright (c) 1988, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#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[] = "@(#)main.c 8.3 (Berkeley) 7/13/93";
#endif /* not lint */
#define _DEFINE
#include "sendmail.h"
#include <signal.h>
#include <sgtty.h>
#ifdef NAMED_BIND
#include <arpa/nameser.h>
#include <resolv.h>
#endif
#include <pwd.h>
# ifdef lint
char edata, end;
# endif lint
/*
** SENDMAIL -- Post mail to a set of destinations.
**
** This is the basic mail router. All user mail programs should
** call this routine to actually deliver mail. Sendmail in
** turn calls a bunch of mail servers that do the real work of
** delivering the mail.
**
** Sendmail is driven by tables read in from /usr/lib/sendmail.cf
** (read by readcf.c). Some more static configuration info,
** including some code that you may want to tailor for your
** installation, is in conf.c. You may also want to touch
** daemon.c (if you have some other IPC mechanism), acct.c
** (to change your accounting), names.c (to adjust the name
** server mechanism).
**
** Usage:
** /usr/lib/sendmail [flags] addr ...
**
** See the associated documentation for details.
**
** Author:
** Eric Allman, UCB/INGRES (until 10/81)
** Britton-Lee, Inc., purveyors of fine
** database computers (from 11/81)
** Now back at UCB at the Mammoth project.
** The support of the INGRES Project and Britton-Lee is
** gratefully acknowledged. Britton-Lee in
** particular had absolutely nothing to gain from
** my involvement in this project.
*/
int NextMailer; /* "free" index into Mailer struct */
char *FullName; /* sender's full name */
ENVELOPE BlankEnvelope; /* a "blank" envelope */
ENVELOPE MainEnvelope; /* the envelope around the basic letter */
ADDRESS NullAddress = /* a null address */
{ "", "", NULL, "" };
char *UserEnviron[MAXUSERENVIRON + 1];
/* saved user environment */
char RealUserName[256]; /* the actual user id on this host */
/*
** Pointers for setproctitle.
** This allows "ps" listings to give more useful information.
** These must be kept out of BSS for frozen configuration files
** to work.
*/
# ifdef SETPROCTITLE
char **Argv = NULL; /* pointer to argument vector */
char *LastArgv = NULL; /* end of argv */
# endif /* SETPROCTITLE */
static void obsolete();
#ifdef DAEMON
#ifndef SMTP
ERROR %%%% Cannot have daemon mode without SMTP %%%% ERROR
#endif /* SMTP */
#endif /* DAEMON */
#define MAXCONFIGLEVEL 4 /* highest config version level known */
main(argc, argv, envp)
int argc;
char **argv;
char **envp;
{
register char *p;
register char *q;
char **av;
extern int finis();
extern char Version[];
char *ep, *from;
typedef int (*fnptr)();
STAB *st;
register int i;
int j;
bool readconfig = TRUE;
bool queuemode = FALSE; /* process queue requests */
bool nothaw;
bool safecf = TRUE;
static bool reenter = FALSE;
char *argv0 = argv[0];
struct passwd *pw;
struct stat stb;
char jbuf[MAXHOSTNAMELEN]; /* holds MyHostName */
extern int DtableSize;
extern int optind;
extern time_t convtime();
extern putheader(), putbody();
extern void intsig();
extern char **myhostname();
extern char *arpadate();
extern char *getauthinfo();
extern char *optarg;
extern char **environ;
/*
** Check to see if we reentered.
** This would normally happen if e_putheader or e_putbody
** were NULL when invoked.
*/
if (reenter)
{
syserr("main: reentered!");
abort();
}
reenter = TRUE;
#ifndef SYS5TZ
/* enforce use of kernel-supplied time zone information */
unsetenv("TZ");
#endif
/* in 4.4BSD, the table can be huge; impose a reasonable limit */
DtableSize = getdtsize();
if (DtableSize > 256)
DtableSize = 256;
/*
** Be sure we have enough file descriptors.
** But also be sure that 0, 1, & 2 are open.
*/
i = open("/dev/null", O_RDWR);
if (fstat(STDIN_FILENO, &stb) < 0)
(void) dup2(i, STDIN_FILENO);
if (fstat(STDOUT_FILENO, &stb) < 0)
(void) dup2(i, STDOUT_FILENO);
if (fstat(STDERR_FILENO, &stb) < 0)
(void) dup2(i, STDERR_FILENO);
(void) close(i);
i = DtableSize;
while (--i > 0)
{
if (i != STDIN_FILENO && i != STDOUT_FILENO && i != STDERR_FILENO)
(void) close(i);
}
errno = 0;
#ifdef LOG_MAIL
openlog("sendmail", LOG_PID, LOG_MAIL);
#else
openlog("sendmail", LOG_PID);
#endif
/* set up the blank envelope */
BlankEnvelope.e_puthdr = putheader;
BlankEnvelope.e_putbody = putbody;
BlankEnvelope.e_xfp = NULL;
STRUCTCOPY(NullAddress, BlankEnvelope.e_from);
CurEnv = &BlankEnvelope;
STRUCTCOPY(NullAddress, MainEnvelope.e_from);
/*
** Set default values for variables.
** These cannot be in initialized data space.
*/
setdefaults(&BlankEnvelope);
RealUid = getuid();
RealGid = getgid();
pw = getpwuid(RealUid);
if (pw != NULL)
(void) strcpy(RealUserName, pw->pw_name);
else
(void) sprintf(RealUserName, "Unknown UID %d", RealUid);
/* our real uid will have to be root -- we will trash this later */
setuid((uid_t) 0);
/* Handle any non-getoptable constructions. */
obsolete(argv);
/*
** Do a quick prescan of the argument list.
** We do this to find out if we can potentially thaw the
** configuration file. If not, we do the thaw now so that
** the argument processing applies to this run rather than
** to the run that froze the configuration.
*/
nothaw = FALSE;
#if defined(__osf__) || defined(_AIX3)
#define OPTIONS "B:b:C:cd:e:F:f:h:Iimno:p:q:r:sTtvX:x"
#else
#define OPTIONS "B:b:C:cd:e:F:f:h:Iimno:p:q:r:sTtvX:"
#endif
while ((j = getopt(argc, argv, OPTIONS)) != EOF)
{
switch (j)
{
case 'b':
if (optarg[0] == 'z' && optarg[1] == '\0')
nothaw = TRUE;
break;
case 'C':
ConfFile = optarg;
(void) setgid(RealGid);
(void) setuid(RealUid);
safecf = FALSE;
nothaw = TRUE;
break;
case 'd':
tTsetup(tTdvect, sizeof tTdvect, "0-99.1");
tTflag(optarg);
setbuf(stdout, (char *) NULL);
printf("Version %s\n", Version);
break;
}
}
InChannel = stdin;
OutChannel = stdout;
# ifdef FROZENCONFIG
if (!nothaw)
readconfig = !thaw(FreezeFile, argv0);
# else
readconfig = TRUE;
# endif
# ifdef SETPROCTITLE
/*
** Move the environment so setproctitle can use the space at
** the top of memory.
*/
for (i = j = 0; j < MAXUSERENVIRON && (p = envp[i]) != NULL; i++)
{
if (strncmp(p, "FS=", 3) == 0 || strncmp(p, "LD_", 3) == 0)
continue;
UserEnviron[j++] = newstr(p);
}
UserEnviron[j] = NULL;
environ = UserEnviron;
/*
** Save start and extent of argv for setproctitle.
*/
Argv = argv;
if (i > 0)
LastArgv = envp[i - 1] + strlen(envp[i - 1]);
else
LastArgv = argv[argc - 1] + strlen(argv[argc - 1]);
# endif /* SETPROCTITLE */
if (signal(SIGINT, SIG_IGN) != SIG_IGN)
(void) signal(SIGINT, intsig);
if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
(void) signal(SIGHUP, intsig);
(void) signal(SIGTERM, intsig);
(void) signal(SIGPIPE, SIG_IGN);
OldUmask = umask(022);
OpMode = MD_DELIVER;
FullName = getenv("NAME");
#ifdef NAMED_BIND
if (tTd(8, 8))
_res.options |= RES_DEBUG;
#endif
errno = 0;
from = NULL;
if (readconfig)
{
/* initialize some macros, etc. */
initmacros();
/* version */
define('v', Version, CurEnv);
}
/* hostname */
av = myhostname(jbuf, sizeof jbuf);
if (jbuf[0] != '\0')
{
struct utsname utsname;
if (tTd(0, 4))
printf("canonical name: %s\n", jbuf);
p = newstr(jbuf);
define('w', p, CurEnv);
setclass('w', p);
q = strchr(jbuf, '.');
if (q != NULL)
{
*q++ = '\0';
define('m', q, CurEnv);
p = newstr(jbuf);
setclass('w', p);
}
if (uname(&utsname) >= 0)
p = utsname.nodename;
else
{
makelower(jbuf);
p = jbuf;
}
if (tTd(0, 4))
printf("UUCP nodename: %s\n", p);
p = newstr(p);
define('k', p, CurEnv);
setclass('w', p);
}
while (av != NULL && *av != NULL)
{
if (tTd(0, 4))
printf("\ta.k.a.: %s\n", *av);
setclass('w', *av++);
}
/* current time */
define('b', arpadate((char *) NULL), CurEnv);
/*
** Find our real host name for future logging.
*/
p = getauthinfo(STDIN_FILENO);
define('_', p, CurEnv);
/*
** Crack argv.
*/
av = argv;
p = strrchr(*av, '/');
if (p++ == NULL)
p = *av;
if (strcmp(p, "newaliases") == 0)
OpMode = MD_INITALIAS;
else if (strcmp(p, "mailq") == 0)
OpMode = MD_PRINT;
else if (strcmp(p, "smtpd") == 0)
OpMode = MD_DAEMON;
optind = 1;
while ((j = getopt(argc, argv, OPTIONS)) != EOF)
{
switch (j)
{
case 'b': /* operations mode */
switch (j = *optarg)
{
case MD_DAEMON:
# ifdef DAEMON
if (RealUid != 0) {
usrerr("Permission denied");
exit (EX_USAGE);
}
(void) unsetenv("HOSTALIASES");
# else
usrerr("Daemon mode not implemented");
ExitStat = EX_USAGE;
break;
# endif /* DAEMON */
case MD_SMTP:
# ifndef SMTP
usrerr("I don't speak SMTP");
ExitStat = EX_USAGE;
break;
# endif /* SMTP */
case MD_DELIVER:
case MD_VERIFY:
case MD_TEST:
case MD_INITALIAS:
case MD_PRINT:
#ifdef FROZENCONFIG
case MD_FREEZE:
#endif
OpMode = j;
break;
#ifndef FROZENCONFIG
case MD_FREEZE:
usrerr("Frozen configurations unsupported");
ExitStat = EX_USAGE;
break;
#endif
default:
usrerr("Invalid operation mode %c", j);
ExitStat = EX_USAGE;
break;
}
break;
case 'B': /* body type */
CurEnv->e_bodytype = newstr(optarg);
break;
case 'C': /* select configuration file (already done) */
if (RealUid != 0)
auth_warning(CurEnv,
"Processed by %s with -C %s",
RealUserName, optarg);
break;
case 'd': /* debugging -- redo in case frozen */
tTsetup(tTdvect, sizeof tTdvect, "0-99.1");
tTflag(optarg);
setbuf(stdout, (char *) NULL);
break;
case 'f': /* from address */
case 'r': /* obsolete -f flag */
if (from != NULL)
{
usrerr("More than one \"from\" person");
ExitStat = EX_USAGE;
break;
}
from = newstr(optarg);
if (strcmp(RealUserName, from) != 0)
auth_warning(CurEnv,
"%s set sender to %s using -%c",
RealUserName, from, j);
break;
case 'F': /* set full name */
FullName = newstr(optarg);
break;
case 'h': /* hop count */
CurEnv->e_hopcount = strtol(optarg, &ep, 10);
if (*ep)
{
usrerr("Bad hop count (%s)", optarg);
ExitStat = EX_USAGE;
break;
}
break;
case 'n': /* don't alias */
NoAlias = TRUE;
break;
case 'o': /* set option */
setoption(*optarg, optarg + 1, FALSE, TRUE, CurEnv);
break;
case 'p': /* set protocol */
q = strchr(optarg, ':');
if (q != NULL)
*q++ = '\0';
if (*optarg != '\0')
define('r', newstr(optarg), CurEnv);
if (q != NULL && *q != '\0')
define('s', newstr(q), CurEnv);
break;
case 'q': /* run queue files at intervals */
# ifdef QUEUE
(void) unsetenv("HOSTALIASES");
FullName = NULL;
queuemode = TRUE;
switch (optarg[0])
{
case 'I':
QueueLimitId = newstr(&optarg[1]);
break;
case 'R':
QueueLimitRecipient = newstr(&optarg[1]);
break;
case 'S':
QueueLimitSender = newstr(&optarg[1]);
break;
default:
QueueIntvl = convtime(optarg, 'm');
break;
}
# else /* QUEUE */
usrerr("I don't know about queues");
ExitStat = EX_USAGE;
# endif /* QUEUE */
break;
case 't': /* read recipients from message */
GrabTo = TRUE;
break;
case 'X': /* traffic log file */
setuid(RealUid);
TrafficLogFile = fopen(optarg, "a");
if (TrafficLogFile == NULL)
{
syserr("cannot open %s", optarg);
break;
}
#ifdef HASSETVBUF
setvbuf(TrafficLogFile, NULL, _IOLBF, BUFSIZ);
#else
setlinebuf(TrafficLogFile);
#endif
break;
/* compatibility flags */
case 'c': /* connect to non-local mailers */
case 'i': /* don't let dot stop me */
case 'm': /* send to me too */
case 'T': /* set timeout interval */
case 'v': /* give blow-by-blow description */
setoption(j, "T", FALSE, TRUE, CurEnv);
break;
case 'e': /* error message disposition */
setoption(j, optarg, FALSE, TRUE, CurEnv);
break;
case 's': /* save From lines in headers */
setoption('f', "T", FALSE, TRUE, CurEnv);
break;
# ifdef DBM
case 'I': /* initialize alias DBM file */
OpMode = MD_INITALIAS;
break;
# endif /* DBM */
# if defined(__osf__) || defined(_AIX3)
case 'x': /* random flag that OSF/1 & AIX mailx passes */
break;
# endif
default:
ExitStat = EX_USAGE;
finis();
break;
}
}
av += optind;
/*
** Do basic initialization.
** Read system control file.
** Extract special fields for local use.
*/
if (OpMode == MD_FREEZE || readconfig)
readcf(ConfFile, safecf, CurEnv);
#ifdef SYS5TZ
/* Enforce use of local time (null string overrides this) */
if (TimeZoneSpec == NULL)
unsetenv("TZ");
else if (TimeZoneSpec[0] != '\0')
{
p = xalloc(strlen(TimeZoneSpec) + 4);
(void) strcpy(p, "TZ=");
(void) strcat(p, TimeZoneSpec);
putenv(p);
}
#endif
if (ConfigLevel > MAXCONFIGLEVEL)
{
syserr("Warning: .cf version level (%d) exceeds program functionality (%d)",
ConfigLevel, MAXCONFIGLEVEL);
}
# ifdef QUEUE
if (queuemode && RealUid != 0)
{
struct stat stbuf;
/* check to see if we own the queue directory */
if (stat(QueueDir, &stbuf) < 0)
syserr("main: cannot stat %s", QueueDir);
if (stbuf.st_uid != RealUid)
{
/* nope, really a botch */
usrerr("Permission denied");
exit (EX_NOPERM);
}
}
# endif /* QUEUE */
switch (OpMode)
{
# ifdef FROZENCONFIG
case MD_FREEZE:
/* this is critical to avoid forgeries of the frozen config */
(void) setgid(RealGid);
(void) setuid(RealUid);
/* freeze the configuration */
freeze(FreezeFile);
exit(EX_OK);
# endif
case MD_INITALIAS:
Verbose = TRUE;
break;
case MD_DAEMON:
/* remove things that don't make sense in daemon mode */
FullName = NULL;
break;
case MD_SMTP:
if (RealUid != 0)
auth_warning(CurEnv,
"%s owned process doing -bs",
RealUserName);
break;
}
/* do heuristic mode adjustment */
if (Verbose)
{
/* turn off noconnect option */
setoption('c', "F", TRUE, FALSE, CurEnv);
/* turn on interactive delivery */
setoption('d', "", TRUE, FALSE, CurEnv);
}
if (ConfigLevel < 3)
{
UseErrorsTo = TRUE;
}
/* our name for SMTP codes */
expand("\201j", jbuf, &jbuf[sizeof jbuf - 1], CurEnv);
MyHostName = jbuf;
/* the indices of built-in mailers */
st = stab("local", ST_MAILER, ST_FIND);
if (st == NULL)
syserr("No local mailer defined");
else
LocalMailer = st->s_mailer;
st = stab("prog", ST_MAILER, ST_FIND);
if (st == NULL)
syserr("No prog mailer defined");
else
ProgMailer = st->s_mailer;
st = stab("*file*", ST_MAILER, ST_FIND);
if (st == NULL)
syserr("No *file* mailer defined");
else
FileMailer = st->s_mailer;
st = stab("*include*", ST_MAILER, ST_FIND);
if (st == NULL)
syserr("No *include* mailer defined");
else
InclMailer = st->s_mailer;
/* operate in queue directory */
if (chdir(QueueDir) < 0)
{
syserr("cannot chdir(%s)", QueueDir);
ExitStat = EX_SOFTWARE;
}
/* if we've had errors so far, exit now */
if (ExitStat != EX_OK && OpMode != MD_TEST)
{
setuid(RealUid);
exit(ExitStat);
}
/*
** Do operation-mode-dependent initialization.
*/
switch (OpMode)
{
case MD_PRINT:
/* print the queue */
#ifdef QUEUE
dropenvelope(CurEnv);
printqueue();
setuid(RealUid);
exit(EX_OK);
#else /* QUEUE */
usrerr("No queue to print");
finis();
#endif /* QUEUE */
case MD_INITALIAS:
/* initialize alias database */
initmaps(TRUE, CurEnv);
setuid(RealUid);
exit(EX_OK);
case MD_DAEMON:
/* don't open alias database -- done in srvrsmtp */
break;
default:
/* open the alias database */
initmaps(FALSE, CurEnv);
break;
}
if (tTd(0, 15))
{
/* print configuration table (or at least part of it) */
printrules();
for (i = 0; i < MAXMAILERS; i++)
{
register struct mailer *m = Mailer[i];
int j;
if (m == NULL)
continue;
printf("mailer %d (%s): P=%s S=%d/%d R=%d/%d M=%ld F=", i, m->m_name,
m->m_mailer, m->m_se_rwset, m->m_sh_rwset,
m->m_re_rwset, m->m_rh_rwset, m->m_maxsize);
for (j = '\0'; j <= '\177'; j++)
if (bitnset(j, m->m_flags))
(void) putchar(j);
printf(" E=");
xputs(m->m_eol);
if (m->m_argv != NULL)
{
char **a = m->m_argv;
printf(" A=");
while (*a != NULL)
{
if (a != m->m_argv)
printf(" ");
xputs(*a++);
}
}
printf("\n");
}
}
/*
** Switch to the main envelope.
*/
CurEnv = newenvelope(&MainEnvelope, CurEnv);
MainEnvelope.e_flags = BlankEnvelope.e_flags;
/*
** If test mode, read addresses from stdin and process.
*/
if (OpMode == MD_TEST)
{
char buf[MAXLINE];
if (isatty(fileno(stdin)))
Verbose = TRUE;
if (Verbose)
{
printf("ADDRESS TEST MODE (ruleset 3 NOT automatically invoked)\n");
printf("Enter <ruleset> <address>\n");
}
for (;;)
{
register char **pvp;
char *q;
auto char *delimptr;
extern bool invalidaddr();
if (Verbose)
printf("> ");
(void) fflush(stdout);
if (fgets(buf, sizeof buf, stdin) == NULL)
finis();
if (!Verbose)
printf("> %s", buf);
if (buf[0] == '#')
continue;
for (p = buf; isascii(*p) && isspace(*p); p++)
continue;
q = p;
while (*p != '\0' && !(isascii(*p) && isspace(*p)))
p++;
if (*p == '\0')
{
printf("No address!\n");
continue;
}
*p = '\0';
if (invalidaddr(p + 1))
continue;
do
{
char pvpbuf[PSBUFSIZE];
pvp = prescan(++p, ',', pvpbuf, &delimptr);
if (pvp == NULL)
continue;
p = q;
while (*p != '\0')
{
int stat;
stat = rewrite(pvp, atoi(p), CurEnv);
if (stat != EX_OK)
printf("== Ruleset %s status %d\n",
p, stat);
while (*p != '\0' && *p++ != ',')
continue;
}
} while (*(p = delimptr) != '\0');
}
}
# ifdef QUEUE
/*
** If collecting stuff from the queue, go start doing that.
*/
if (queuemode && OpMode != MD_DAEMON && QueueIntvl == 0)
{
runqueue(FALSE);
finis();
}
# endif /* QUEUE */
/*
** If a daemon, wait for a request.
** getrequests will always return in a child.
** If we should also be processing the queue, start
** doing it in background.
** We check for any errors that might have happened
** during startup.
*/
if (OpMode == MD_DAEMON || QueueIntvl != 0)
{
char dtype[200];
if (!tTd(0, 1))
{
/* put us in background */
i = fork();
if (i < 0)
syserr("daemon: cannot fork");
if (i != 0)
exit(0);
/* disconnect from our controlling tty */
disconnect(TRUE, CurEnv);
}
dtype[0] = '\0';
if (OpMode == MD_DAEMON)
strcat(dtype, "+SMTP");
if (QueueIntvl != 0)
{
strcat(dtype, "+queueing@");
strcat(dtype, pintvl(QueueIntvl, TRUE));
}
if (tTd(0, 1))
strcat(dtype, "+debugging");
syslog(LOG_INFO, "starting daemon (%s): %s", Version, dtype + 1);
#ifdef XLA
xla_create_file();
#endif
# ifdef QUEUE
if (queuemode)
{
runqueue(TRUE);
if (OpMode != MD_DAEMON)
for (;;)
pause();
}
# endif /* QUEUE */
dropenvelope(CurEnv);
#ifdef DAEMON
getrequests();
/* at this point we are in a child: reset state */
(void) newenvelope(CurEnv, CurEnv);
/*
** Get authentication data
*/
p = getauthinfo(fileno(InChannel));
define('_', p, CurEnv);
#endif /* DAEMON */
}
# ifdef SMTP
/*
** If running SMTP protocol, start collecting and executing
** commands. This will never return.
*/
if (OpMode == MD_SMTP)
smtp(CurEnv);
# endif /* SMTP */
/*
** Do basic system initialization and set the sender
*/
/* make sendmail immune from process group signals */
# ifdef _POSIX_JOB_CONTROL
(void) setpgid(0, getpid());
# else
# ifndef SYSTEM5
(void) setpgrp(0, getpid());
# endif
# endif
initsys(CurEnv);
setsender(from, CurEnv, NULL, FALSE);
if (macvalue('s', CurEnv) == NULL)
define('s', RealHostName, CurEnv);
if (*av == NULL && !GrabTo)
{
usrerr("Recipient names must be specified");
/* collect body for UUCP return */
if (OpMode != MD_VERIFY)
collect(FALSE, FALSE, CurEnv);
finis();
}
if (OpMode == MD_VERIFY)
{
CurEnv->e_sendmode = SM_VERIFY;
CurEnv->e_errormode = EM_QUIET;
}
/*
** Scan argv and deliver the message to everyone.
*/
sendtoargv(av, CurEnv);
/* if we have had errors sofar, arrange a meaningful exit stat */
if (Errors > 0 && ExitStat == EX_OK)
ExitStat = EX_USAGE;
/*
** Read the input mail.
*/
CurEnv->e_to = NULL;
if (OpMode != MD_VERIFY || GrabTo)
collect(FALSE, FALSE, CurEnv);
errno = 0;
/* collect statistics */
if (OpMode != MD_VERIFY)
markstats(CurEnv, (ADDRESS *) NULL);
if (tTd(1, 1))
printf("From person = \"%s\"\n", CurEnv->e_from.q_paddr);
/*
** Actually send everything.
** If verifying, just ack.
*/
CurEnv->e_from.q_flags |= QDONTSEND;
if (tTd(1, 5))
{
printf("main: QDONTSEND ");
printaddr(&CurEnv->e_from, FALSE);
}
CurEnv->e_to = NULL;
sendall(CurEnv, SM_DEFAULT);
/*
** All done.
** Don't send return error message if in VERIFY mode.
*/
finis();
}
\f/*
** FINIS -- Clean up and exit.
**
** Parameters:
** none
**
** Returns:
** never
**
** Side Effects:
** exits sendmail
*/
finis()
{
if (tTd(2, 1))
printf("\n====finis: stat %d e_flags %o\n", ExitStat, CurEnv->e_flags);
/* clean up temp files */
CurEnv->e_to = NULL;
dropenvelope(CurEnv);
/* flush any cached connections */
mci_flush(TRUE, NULL);
# ifdef XLA
/* clean up extended load average stuff */
xla_all_end();
# endif
/* and exit */
# ifdef LOG
if (LogLevel > 78)
syslog(LOG_DEBUG, "finis, pid=%d", getpid());
# endif /* LOG */
if (ExitStat == EX_TEMPFAIL)
ExitStat = EX_OK;
/* reset uid for process accounting */
setuid(RealUid);
exit(ExitStat);
}
\f/*
** INTSIG -- clean up on interrupt
**
** This just arranges to exit. It pessimises in that it
** may resend a message.
**
** Parameters:
** none.
**
** Returns:
** none.
**
** Side Effects:
** Unlocks the current job.
*/
void
intsig()
{
FileName = NULL;
unlockqueue(CurEnv);
#ifdef XLA
xla_all_end();
#endif
/* reset uid for process accounting */
setuid(RealUid);
exit(EX_OK);
}
\f/*
** INITMACROS -- initialize the macro system
**
** This just involves defining some macros that are actually
** used internally as metasymbols to be themselves.
**
** Parameters:
** none.
**
** Returns:
** none.
**
** Side Effects:
** initializes several macros to be themselves.
*/
struct metamac MetaMacros[] =
{
/* LHS pattern matching characters */
'*', MATCHZANY, '+', MATCHANY, '-', MATCHONE,
'=', MATCHCLASS, '~', MATCHNCLASS,
/* these are RHS metasymbols */
'#', CANONNET, '@', CANONHOST, ':', CANONUSER,
'>', CALLSUBR,
/* the conditional operations */
'?', CONDIF, '|', CONDELSE, '.', CONDFI,
/* the hostname lookup characters */
'[', HOSTBEGIN, ']', HOSTEND,
'(', LOOKUPBEGIN, ')', LOOKUPEND,
/* miscellaneous control characters */
'&', MACRODEXPAND,
'\0'
};
initmacros()
{
register struct metamac *m;
char buf[5];
register int c;
for (m = MetaMacros; m->metaname != '\0'; m++)
{
buf[0] = m->metaval;
buf[1] = '\0';
define(m->metaname, newstr(buf), CurEnv);
}
buf[0] = MATCHREPL;
buf[2] = '\0';
for (c = '0'; c <= '9'; c++)
{
buf[1] = c;
define(c, newstr(buf), CurEnv);
}
}
\f/*
** FREEZE -- freeze BSS & allocated memory
**
** This will be used to efficiently load the configuration file.
**
** Parameters:
** freezefile -- the name of the file to freeze to.
**
** Returns:
** none.
**
** Side Effects:
** Writes BSS and malloc'ed memory to freezefile
*/
# ifdef FROZENCONFIG
union frz
{
char frzpad[BUFSIZ]; /* insure we are on a BUFSIZ boundary */
struct
{
time_t frzstamp; /* timestamp on this freeze */
char *frzbrk; /* the current break */
char *frzedata; /* address of edata */
char *frzend; /* address of end */
char frzver[252]; /* sendmail version */
} frzinfo;
};
#if defined(__hpux) || defined(__alpha)
#define BRK_TYPE int
#define SBRK_TYPE void *
#else
#define BRK_TYPE char *
#define SBRK_TYPE char *
#endif
freeze(freezefile)
char *freezefile;
{
int f;
union frz fhdr;
extern SBRK_TYPE sbrk();
extern char edata, end;
extern char Version[];
if (freezefile == NULL)
return;
/* try to open the freeze file */
f = creat(freezefile, FileMode);
if (f < 0)
{
syserr("Cannot freeze %s", freezefile);
errno = 0;
return;
}
/* build the freeze header */
fhdr.frzinfo.frzstamp = curtime();
fhdr.frzinfo.frzbrk = sbrk(0);
fhdr.frzinfo.frzedata = &edata;
fhdr.frzinfo.frzend = &end;
(void) strcpy(fhdr.frzinfo.frzver, Version);
/* write out the freeze header */
if (write(f, (char *) &fhdr, sizeof fhdr) != sizeof fhdr ||
write(f, (char *) &edata, (int) (fhdr.frzinfo.frzbrk - &edata)) !=
(int) (fhdr.frzinfo.frzbrk - &edata))
{
syserr("Cannot freeze %s", freezefile);
}
/* fine, clean up */
(void) close(f);
}
\f/*
** THAW -- read in the frozen configuration file.
**
** Parameters:
** freezefile -- the name of the file to thaw from.
** binfile -- the name of the sendmail binary (ok to guess).
**
** Returns:
** TRUE if it successfully read the freeze file.
** FALSE otherwise.
**
** Side Effects:
** reads freezefile in to BSS area.
*/
thaw(freezefile, binfile)
char *freezefile;
char *binfile;
{
int f;
register char *p;
union frz fhdr;
char hbuf[60];
struct stat fst, sst;
extern char edata, end;
extern char Version[];
extern char **myhostname();
extern BRK_TYPE brk();
if (freezefile == NULL)
return (FALSE);
/* open the freeze file */
f = open(freezefile, 0);
if (f < 0)
{
errno = 0;
return (FALSE);
}
if (fstat(f, &fst) < 0 || stat(ConfFile, &sst) < 0 ||
fst.st_mtime < sst.st_mtime)
{
syslog(LOG_WARNING, "Freeze file older than config file");
(void) close(f);
return (FALSE);
}
if (strchr(binfile, '/') != NULL && stat(binfile, &sst) == 0 &&
fst.st_mtime < sst.st_mtime)
{
syslog(LOG_WARNING, "Freeze file older than binary file");
(void) close(f);
return (FALSE);
}
/* read in the header */
if (read(f, (char *) &fhdr, sizeof fhdr) < sizeof fhdr)
{
syslog(LOG_WARNING, "Cannot read frozen config file");
(void) close(f);
return (FALSE);
}
if (fhdr.frzinfo.frzedata != &edata ||
fhdr.frzinfo.frzend != &end ||
strcmp(fhdr.frzinfo.frzver, Version) != 0)
{
fprintf(stderr, "Wrong version of frozen config file\n");
syslog(LOG_WARNING, "Wrong version of frozen config file");
(void) close(f);
return (FALSE);
}
/* arrange to have enough space */
if (brk(fhdr.frzinfo.frzbrk) == (BRK_TYPE) -1)
{
syserr("Cannot break to %x", fhdr.frzinfo.frzbrk);
(void) close(f);
return (FALSE);
}
/* now read in the freeze file */
if (read(f, (char *) &edata, (int) (fhdr.frzinfo.frzbrk - &edata)) !=
(int) (fhdr.frzinfo.frzbrk - &edata))
{
syserr("Cannot read frozen config file");
/* oops! we have trashed memory..... */
(void) write(2, "Cannot read freeze file\n", 24);
_exit(EX_SOFTWARE);
}
(void) close(f);
/* verify that the host name was correct on the freeze */
(void) myhostname(hbuf, sizeof hbuf);
p = macvalue('w', CurEnv);
if (p == NULL)
p = "";
if (strcmp(hbuf, macvalue('w', CurEnv)) == 0)
return (TRUE);
syslog(LOG_WARNING, "Hostname changed since freeze (%s => %s)",
p, hbuf);
return (FALSE);
}
# endif /* FROZENCONFIG */
\f/*
** DISCONNECT -- remove our connection with any foreground process
**
** Parameters:
** fulldrop -- if set, we should also drop the controlling
** TTY if possible -- this should only be done when
** setting up the daemon since otherwise UUCP can
** leave us trying to open a dialin, and we will
** wait for the carrier.
**
** Returns:
** none
**
** Side Effects:
** Trys to insure that we are immune to vagaries of
** the controlling tty.
*/
disconnect(fulldrop, e)
bool fulldrop;
register ENVELOPE *e;
{
int fd;
if (tTd(52, 1))
printf("disconnect: In %d Out %d, e=%x\n",
fileno(InChannel), fileno(OutChannel), e);
if (tTd(52, 5))
{
printf("don't\n");
return;
}
/* be sure we don't get nasty signals */
(void) signal(SIGHUP, SIG_IGN);
(void) signal(SIGINT, SIG_IGN);
(void) signal(SIGQUIT, SIG_IGN);
/* we can't communicate with our caller, so.... */
HoldErrs = TRUE;
CurEnv->e_errormode = EM_MAIL;
Verbose = FALSE;
/* all input from /dev/null */
if (InChannel != stdin)
{
(void) fclose(InChannel);
InChannel = stdin;
}
(void) freopen("/dev/null", "r", stdin);
/* output to the transcript */
if (OutChannel != stdout)
{
(void) fclose(OutChannel);
OutChannel = stdout;
}
if (e->e_xfp == NULL)
fd = open("/dev/null", O_WRONLY, 0666);
else
fd = fileno(e->e_xfp);
(void) fflush(stdout);
dup2(fd, STDOUT_FILENO);
dup2(fd, STDERR_FILENO);
if (e->e_xfp == NULL)
close(fd);
/* drop our controlling TTY completely if possible */
if (fulldrop)
{
(void) setsid();
#ifdef TIOCNOTTY
fd = open("/dev/tty", 2);
if (fd >= 0)
{
(void) ioctl(fd, (int) TIOCNOTTY, (char *) 0);
(void) close(fd);
}
(void) setpgrp(0, 0);
#endif /* TIOCNOTTY */
errno = 0;
}
# ifdef LOG
if (LogLevel > 71)
syslog(LOG_DEBUG, "in background, pid=%d", getpid());
# endif /* LOG */
errno = 0;
}
static void
obsolete(argv)
char *argv[];
{
char *ap;
while ((ap = *++argv) != NULL)
{
/* Return if "--" or not an option of any form. */
if (ap[0] != '-' || ap[1] == '-')
return;
/* If -C doesn't have an argument, use sendmail.cf. */
#define __DEFPATH "sendmail.cf"
if (ap[1] == 'C' && ap[2] == '\0' &&
(argv[1] == NULL || argv[1][0] == '-'))
{
*argv = xalloc(sizeof(__DEFPATH) + 2);
argv[0][0] = '-';
argv[0][1] = 'C';
(void)strcpy(&argv[0][2], __DEFPATH);
}
/* If -q doesn't have an argument, run it once. */
if (ap[1] == 'q' && ap[2] == '\0' &&
(argv[1] == NULL || argv[1][0] == '-'))
*argv = "-q0";
/* if -d doesn't have an argument, use 0-99.1 */
if (ap[1] == 'd' && ap[2] == '\0' &&
(argv[1] == NULL || !isdigit(argv[1][0])))
*argv = "-d0-99.1";
}
}
\f/*
** AUTH_WARNING -- specify authorization warning
**
** Parameters:
** e -- the current envelope.
** msg -- the text of the message.
** args -- arguments to the message.
**
** Returns:
** none.
*/
void
#ifdef __STDC__
auth_warning(register ENVELOPE *e, const char *msg, ...)
#else
auth_warning(e, msg, va_alist)
register ENVELOPE *e;
const char *msg;
va_dcl
#endif
{
char buf[MAXLINE];
VA_LOCAL_DECL
if (bitset(PRIV_AUTHWARNINGS, PrivacyFlags))
{
register char *p;
static char hostbuf[48];
extern char **myhostname();
if (hostbuf[0] == '\0')
(void) myhostname(hostbuf, sizeof hostbuf);
(void) sprintf(buf, "%s: ", hostbuf);
p = &buf[strlen(buf)];
VA_START(msg);
vsprintf(p, msg, ap);
VA_END;
addheader("X-Authentication-Warning", buf, e);
}
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.