diff options
Diffstat (limited to 'usr.sbin/sendmail/src/main.c')
| -rw-r--r-- | usr.sbin/sendmail/src/main.c | 2572 |
1 files changed, 0 insertions, 2572 deletions
diff --git a/usr.sbin/sendmail/src/main.c b/usr.sbin/sendmail/src/main.c deleted file mode 100644 index 9dd8a6a..0000000 --- a/usr.sbin/sendmail/src/main.c +++ /dev/null @@ -1,2572 +0,0 @@ -/* - * Copyright (c) 1983, 1995-1997 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 8.258 (Berkeley) 10/20/97"; -#endif /* not lint */ - -#define _DEFINE - -#include "sendmail.h" -#include <arpa/inet.h> -#if NAMED_BIND -#include <resolv.h> -#endif - -/* -** 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 settings read in from /etc/sendmail.cf -** (read by readcf.c). -** -** 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 (11/81 - 10/88). -** International Computer Science Institute -** (11/88 - 9/89). -** UCB/Mammoth Project (10/89 - 7/95). -** InReference, Inc. (8/95 - 1/97). -** The support of the my employers is gratefully acknowledged. -** Few of them (Britton-Lee in particular) have had -** anything 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 *CommandLineArgs; /* command line args for pid file */ -bool Warn_Q_option = FALSE; /* warn about Q option use */ -char **SaveArgv; /* argument vector for re-execing */ -int MissingFds = 0; /* bit map of fds missing on startup */ - -#ifdef NGROUPS_MAX -GIDSET_T InitialGidSet[NGROUPS_MAX]; -#endif - -static void obsolete(); -extern void printmailer __P((MAILER *)); -extern void tTflag __P((char *)); - -#if DAEMON && !SMTP -ERROR %%%% Cannot have DAEMON mode without SMTP %%%% ERROR -#endif /* DAEMON && !SMTP */ -#if SMTP && !QUEUE -ERROR %%%% Cannot have SMTP mode without QUEUE %%%% ERROR -#endif /* DAEMON && !SMTP */ - -#define MAXCONFIGLEVEL 7 /* highest config version level known */ - -int -main(argc, argv, envp) - int argc; - char **argv; - char **envp; -{ - register char *p; - char **av; - extern char Version[]; - char *ep, *from; - STAB *st; - register int i; - int j; - bool queuemode = FALSE; /* process queue requests */ - bool safecf = TRUE; - bool warn_C_flag = FALSE; - char warn_f_flag = '\0'; - bool run_in_foreground = FALSE; /* -bD mode */ - static bool reenter = FALSE; - struct passwd *pw; - struct hostent *hp; - bool nullserver = FALSE; - char jbuf[MAXHOSTNAMELEN]; /* holds MyHostName */ - static char rnamebuf[MAXNAME]; /* holds RealUserName */ - char *emptyenviron[1]; - extern int DtableSize; - extern int optind; - extern int opterr; - extern char *optarg; - extern char **environ; - extern time_t convtime(); - extern SIGFUNC_DECL intsig __P((int)); - extern struct hostent *myhostname(); - extern char *getauthinfo(); - extern char *getcfname(); - extern SIGFUNC_DECL sigusr1 __P((int)); - extern SIGFUNC_DECL sighup __P((int)); - extern void initmacros __P((ENVELOPE *)); - extern void init_md __P((int, char **)); - extern int getdtsize __P((void)); - extern void tTsetup __P((u_char *, int, char *)); - extern void setdefaults __P((ENVELOPE *)); - extern void initsetproctitle __P((int, char **, char **)); - extern void init_vendor_macros __P((ENVELOPE *)); - extern void load_if_names __P((void)); - extern void vendor_pre_defaults __P((ENVELOPE *)); - extern void vendor_post_defaults __P((ENVELOPE *)); - extern void readcf __P((char *, bool, ENVELOPE *)); - extern void printqueue __P((void)); - extern void sendtoargv __P((char **, ENVELOPE *)); - extern void resetlimits __P((void)); - - /* - ** 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; - - /* avoid null pointer dereferences */ - TermEscape.te_rv_on = TermEscape.te_rv_off = ""; - - /* do machine-dependent initializations */ - init_md(argc, argv); - - /* 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. - */ - - fill_fd(STDIN_FILENO, NULL); - fill_fd(STDOUT_FILENO, NULL); - fill_fd(STDERR_FILENO, NULL); - - i = DtableSize; - while (--i > 0) - { - if (i != STDIN_FILENO && i != STDOUT_FILENO && i != STDERR_FILENO) - (void) close(i); - } - errno = 0; - -#if LOG -# ifdef LOG_MAIL - openlog("sendmail", LOG_PID, LOG_MAIL); -# else - openlog("sendmail", LOG_PID); -# endif -#endif - - if (MissingFds != 0) - { - char mbuf[MAXLINE]; - - mbuf[0] = '\0'; - if (bitset(1 << STDIN_FILENO, MissingFds)) - strcat(mbuf, ", stdin"); - if (bitset(1 << STDOUT_FILENO, MissingFds)) - strcat(mbuf, ", stdout"); - if (bitset(1 << STDERR_FILENO, MissingFds)) - strcat(mbuf, ", stderr"); - syserr("File descriptors missing on startup: %s", &mbuf[2]); - } - - /* reset status from syserr() calls for missing file descriptors */ - Errors = 0; - ExitStat = EX_OK; - -#if XDEBUG - checkfd012("after openlog"); -#endif - - tTsetup(tTdvect, sizeof tTdvect, "0-99.1"); - -#ifdef NGROUPS_MAX - /* save initial group set for future checks */ - i = getgroups(NGROUPS_MAX, InitialGidSet); - if (i == 0) - InitialGidSet[0] = (GID_T) -1; - while (i < NGROUPS_MAX) - InitialGidSet[i++] = InitialGidSet[0]; -#endif - - /* drop group id privileges (RunAsUser not yet set) */ - (void) drop_privileges(FALSE); - -#ifdef SIGUSR1 - /* arrange to dump state on user-1 signal */ - setsignal(SIGUSR1, sigusr1); -#endif - - /* Handle any non-getoptable constructions. */ - obsolete(argv); - - /* - ** Do a quick prescan of the argument list. - */ - -#if defined(__osf__) || defined(_AIX3) -# define OPTIONS "B:b:C:cd:e:F:f:h:IiM:mN:nO:o:p:q:R:r:sTtUV:vX:x" -#endif -#if defined(sony_news) -# define OPTIONS "B:b:C:cd:E:e:F:f:h:IiJ:M:mN:nO:o:p:q:R:r:sTtUV:vX:" -#endif -#ifndef OPTIONS -# define OPTIONS "B:b:C:cd:e:F:f:h:IiM:mN:nO:o:p:q:R:r:sTtUV:vX:" -#endif - opterr = 0; - while ((j = getopt(argc, argv, OPTIONS)) != -1) - { - switch (j) - { - case 'd': - /* hack attack -- see if should use ANSI mode */ - if (strcmp(optarg, "ANSI") == 0) - { - TermEscape.te_rv_on = "\033[7m"; - TermEscape.te_rv_off = "\033[0m"; - break; - } - tTflag(optarg); - setbuf(stdout, (char *) NULL); - break; - } - } - opterr = 1; - - /* 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 = sm_getpwuid(RealUid); - if (pw != NULL) - (void) snprintf(rnamebuf, sizeof rnamebuf, "%s", pw->pw_name); - else - (void) snprintf(rnamebuf, sizeof rnamebuf, "Unknown UID %d", RealUid); - RealUserName = rnamebuf; - - /* if running non-setuid binary, pretend we are the RunAsUid */ - if (geteuid() == RealUid) - { - if (tTd(47, 1)) - printf("Non-setuid binary: RunAsUid = RealUid = %d\n", - RealUid); - RunAsUid = RealUid; - } - if (getegid() == RealGid) - RunAsGid = RealGid; - - /* save command line arguments */ - i = 0; - for (av = argv; *av != NULL; ) - i += strlen(*av++) + 1; - SaveArgv = (char **) xalloc(sizeof (char *) * (argc + 1)); - CommandLineArgs = xalloc(i); - p = CommandLineArgs; - for (av = argv, i = 0; *av != NULL; ) - { - SaveArgv[i++] = newstr(*av); - if (av != argv) - *p++ = ' '; - strcpy(p, *av++); - p += strlen(p); - } - SaveArgv[i] = NULL; - - if (tTd(0, 1)) - { - int ll; - extern char *CompileOptions[]; - - printf("Version %s\n Compiled with:", Version); - av = CompileOptions; - ll = 7; - while (*av != NULL) - { - if (ll + strlen(*av) > 63) - { - putchar('\n'); - ll = 0; - } - if (ll == 0) - { - putchar('\t'); - putchar('\t'); - } - else - putchar(' '); - printf("%s", *av); - ll += strlen(*av++) + 1; - } - putchar('\n'); - } - if (tTd(0, 10)) - { - int ll; - extern char *OsCompileOptions[]; - - printf(" OS Defines:"); - av = OsCompileOptions; - ll = 7; - while (*av != NULL) - { - if (ll + strlen(*av) > 63) - { - putchar('\n'); - ll = 0; - } - if (ll == 0) - { - putchar('\t'); - putchar('\t'); - } - else - putchar(' '); - printf("%s", *av); - ll += strlen(*av++) + 1; - } - putchar('\n'); -#ifdef _PATH_UNIX - printf("Kernel symbols:\t%s\n", _PATH_UNIX); -#endif - printf(" Def Conf file:\t%s\n", getcfname()); - printf(" Pid file:\t%s\n", PidFile); - } - - InChannel = stdin; - OutChannel = stdout; - - /* initialize for setproctitle */ - initsetproctitle(argc, argv, envp); - - /* clear sendmail's environment */ - ExternalEnviron = environ; - emptyenviron[0] = NULL; - environ = emptyenviron; - - /* prime the child environment */ - setuserenv("AGENT", "sendmail"); - - if (setsignal(SIGINT, SIG_IGN) != SIG_IGN) - (void) setsignal(SIGINT, intsig); - (void) setsignal(SIGTERM, intsig); - (void) setsignal(SIGPIPE, SIG_IGN); - OldUmask = umask(022); - OpMode = MD_DELIVER; - FullName = getextenv("NAME"); - - /* - ** Initialize name server if it is going to be used. - */ - -#if NAMED_BIND - if (!bitset(RES_INIT, _res.options)) - res_init(); - if (tTd(8, 8)) - _res.options |= RES_DEBUG; - else - _res.options &= ~RES_DEBUG; -# ifdef RES_NOALIASES - _res.options |= RES_NOALIASES; -# endif -#endif - - errno = 0; - from = NULL; - - /* initialize some macros, etc. */ - initmacros(CurEnv); - init_vendor_macros(CurEnv); - - /* version */ - define('v', Version, CurEnv); - - /* hostname */ - hp = myhostname(jbuf, sizeof jbuf); - if (jbuf[0] != '\0') - { - struct utsname utsname; - - if (tTd(0, 4)) - printf("canonical name: %s\n", jbuf); - define('w', newstr(jbuf), CurEnv); /* must be new string */ - define('j', newstr(jbuf), CurEnv); - setclass('w', jbuf); - - p = strchr(jbuf, '.'); - if (p != NULL) - { - if (p[1] != '\0') - { - define('m', newstr(&p[1]), CurEnv); - } - while (p != NULL && strchr(&p[1], '.') != NULL) - { - *p = '\0'; - if (tTd(0, 4)) - printf("\ta.k.a.: %s\n", jbuf); - setclass('w', jbuf); - *p++ = '.'; - p = strchr(p, '.'); - } - } - - if (uname(&utsname) >= 0) - p = utsname.nodename; - else - { - if (tTd(0, 22)) - printf("uname failed (%s)\n", errstring(errno)); - makelower(jbuf); - p = jbuf; - } - if (tTd(0, 4)) - printf(" UUCP nodename: %s\n", p); - p = newstr(p); - define('k', p, CurEnv); - setclass('k', p); - setclass('w', p); - } - if (hp != NULL) - { - for (av = hp->h_aliases; av != NULL && *av != NULL; av++) - { - if (tTd(0, 4)) - printf("\ta.k.a.: %s\n", *av); - setclass('w', *av); - } -#if NETINET - if (hp->h_addrtype == AF_INET && hp->h_length == INADDRSZ) - { - register int i; - - for (i = 0; hp->h_addr_list[i] != NULL; i++) - { - char ipbuf[103]; - - snprintf(ipbuf, sizeof ipbuf, "[%.100s]", - inet_ntoa(*((struct in_addr *) hp->h_addr_list[i]))); - if (tTd(0, 4)) - printf("\ta.k.a.: %s\n", ipbuf); - setclass('w', ipbuf); - } - } -#endif - } - - /* current time */ - define('b', arpadate((char *) NULL), 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; - else if (strcmp(p, "hoststat") == 0) - OpMode = MD_HOSTSTAT; - else if (strcmp(p, "purgestat") == 0) - OpMode = MD_PURGESTAT; - - optind = 1; - while ((j = getopt(argc, argv, OPTIONS)) != -1) - { - switch (j) - { - case 'b': /* operations mode */ - switch (j = *optarg) - { - case MD_DAEMON: - case MD_FGDAEMON: -# if !DAEMON - usrerr("Daemon mode not implemented"); - ExitStat = EX_USAGE; - break; -# endif /* DAEMON */ - case MD_SMTP: -# if !SMTP - usrerr("I don't speak SMTP"); - ExitStat = EX_USAGE; - break; -# endif /* SMTP */ - - case MD_INITALIAS: - case MD_DELIVER: - case MD_VERIFY: - case MD_TEST: - case MD_PRINT: - case MD_HOSTSTAT: - case MD_PURGESTAT: - case MD_ARPAFTP: - OpMode = j; - break; - - case MD_FREEZE: - usrerr("Frozen configurations unsupported"); - ExitStat = EX_USAGE; - break; - - default: - usrerr("Invalid operation mode %c", j); - ExitStat = EX_USAGE; - break; - } - break; - - case 'B': /* body type */ - CurEnv->e_bodytype = optarg; - break; - - case 'C': /* select configuration file (already done) */ - if (RealUid != 0) - warn_C_flag = TRUE; - ConfFile = optarg; - (void) drop_privileges(TRUE); - safecf = FALSE; - break; - - case 'd': /* debugging -- already done */ - 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(denlstring(optarg, TRUE, TRUE)); - if (strcmp(RealUserName, from) != 0) - warn_f_flag = 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; - - case 'n': /* don't alias */ - NoAlias = TRUE; - break; - - case 'N': /* delivery status notifications */ - DefaultNotify |= QHASNOTIFY; - if (strcasecmp(optarg, "never") == 0) - break; - for (p = optarg; p != NULL; optarg = p) - { - p = strchr(p, ','); - if (p != NULL) - *p++ = '\0'; - if (strcasecmp(optarg, "success") == 0) - DefaultNotify |= QPINGONSUCCESS; - else if (strcasecmp(optarg, "failure") == 0) - DefaultNotify |= QPINGONFAILURE; - else if (strcasecmp(optarg, "delay") == 0) - DefaultNotify |= QPINGONDELAY; - else - { - usrerr("Invalid -N argument"); - ExitStat = EX_USAGE; - } - } - break; - - case 'o': /* set option */ - setoption(*optarg, optarg + 1, FALSE, TRUE, CurEnv); - break; - - case 'O': /* set option (long form) */ - setoption(' ', optarg, FALSE, TRUE, CurEnv); - break; - - case 'p': /* set protocol */ - p = strchr(optarg, ':'); - if (p != NULL) - { - *p++ = '\0'; - if (*p != '\0') - { - ep = xalloc(strlen(p) + 1); - cleanstrcpy(ep, p, MAXNAME); - define('s', ep, CurEnv); - } - } - if (*optarg != '\0') - { - ep = xalloc(strlen(optarg) + 1); - cleanstrcpy(ep, optarg, MAXNAME); - define('r', ep, CurEnv); - } - break; - - case 'q': /* run queue files at intervals */ -# if QUEUE - 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 'R': /* DSN RET: what to return */ - if (bitset(EF_RET_PARAM, CurEnv->e_flags)) - { - usrerr("Duplicate -R flag"); - ExitStat = EX_USAGE; - break; - } - CurEnv->e_flags |= EF_RET_PARAM; - if (strcasecmp(optarg, "hdrs") == 0) - CurEnv->e_flags |= EF_NO_BODY_RETN; - else if (strcasecmp(optarg, "full") != 0) - { - usrerr("Invalid -R value"); - ExitStat = EX_USAGE; - } - break; - - case 't': /* read recipients from message */ - GrabTo = TRUE; - break; - - case 'U': /* initial (user) submission */ - UserSubmission = TRUE; - break; - - case 'V': /* DSN ENVID: set "original" envelope id */ - if (!xtextok(optarg)) - { - usrerr("Invalid syntax in -V flag"); - ExitStat = EX_USAGE; - } - else - CurEnv->e_envid = newstr(optarg); - break; - - case 'X': /* traffic log file */ - (void) drop_privileges(TRUE); - TrafficLogFile = fopen(optarg, "a"); - if (TrafficLogFile == NULL) - { - syserr("cannot open %s", optarg); - ExitStat = EX_CANTCREAT; - break; - } -#ifdef HASSETVBUF - setvbuf(TrafficLogFile, NULL, _IOLBF, 0); -#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 */ - case 'M': /* define macro */ - 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 -# if defined(sony_news) - case 'E': - case 'J': /* ignore flags for Japanese code conversion - impremented on Sony NEWS */ - break; -# endif - - default: - ExitStat = EX_USAGE; - finis(); - break; - } - } - av += optind; - - /* - ** Do basic initialization. - ** Read system control file. - ** Extract special fields for local use. - */ - - /* set up ${opMode} for use in config file */ - { - char mbuf[2]; - - mbuf[0] = OpMode; - mbuf[1] = '\0'; - define(MID_OPMODE, newstr(mbuf), CurEnv); - } - -#if XDEBUG - checkfd012("before readcf"); -#endif - vendor_pre_defaults(CurEnv); - readcf(getcfname(), safecf, CurEnv); - ConfigFileRead = TRUE; - vendor_post_defaults(CurEnv); - - /* Enforce use of local time (null string overrides this) */ - if (TimeZoneSpec == NULL) - unsetenv("TZ"); - else if (TimeZoneSpec[0] != '\0') - setuserenv("TZ", TimeZoneSpec); - else - setuserenv("TZ", NULL); - tzset(); - - /* avoid denial-of-service attacks */ - resetlimits(); - - if (OpMode != MD_DAEMON && OpMode != MD_FGDAEMON) - { - /* drop privileges -- daemon mode done after socket/bind */ - (void) drop_privileges(FALSE); - } - - /* - ** Find our real host name for future logging. - */ - - p = getauthinfo(STDIN_FILENO); - define('_', p, CurEnv); - - /* suppress error printing if errors mailed back or whatever */ - if (CurEnv->e_errormode != EM_PRINT) - HoldErrs = TRUE; - - /* set up the $=m class now, after .cf has a chance to redefine $m */ - expand("\201m", jbuf, sizeof jbuf, CurEnv); - setclass('m', jbuf); - - /* probe interfaces and locate any additional names */ - if (!DontProbeInterfaces) - load_if_names(); - - if (tTd(0, 1)) - { - printf("\n============ SYSTEM IDENTITY (after readcf) ============"); - printf("\n (short domain name) $w = "); - xputs(macvalue('w', CurEnv)); - printf("\n (canonical domain name) $j = "); - xputs(macvalue('j', CurEnv)); - printf("\n (subdomain name) $m = "); - xputs(macvalue('m', CurEnv)); - printf("\n (node name) $k = "); - xputs(macvalue('k', CurEnv)); - printf("\n========================================================\n\n"); - } - - /* - ** Do more command line checking -- these are things that - ** have to modify the results of reading the config file. - */ - - /* process authorization warnings from command line */ - if (warn_C_flag) - auth_warning(CurEnv, "Processed by %s with -C %s", - RealUserName, ConfFile); - if (Warn_Q_option) - auth_warning(CurEnv, "Processed from queue %s", QueueDir); - - /* check body type for legality */ - if (CurEnv->e_bodytype == NULL) - /* nothing */ ; - else if (strcasecmp(CurEnv->e_bodytype, "7BIT") == 0) - SevenBitInput = TRUE; - else if (strcasecmp(CurEnv->e_bodytype, "8BITMIME") == 0) - SevenBitInput = FALSE; - else - { - usrerr("Illegal body type %s", CurEnv->e_bodytype); - CurEnv->e_bodytype = NULL; - } - - /* tweak default DSN notifications */ - if (DefaultNotify == 0) - DefaultNotify = QPINGONFAILURE|QPINGONDELAY; - - /* be sure we don't pick up bogus HOSTALIASES environment variable */ - if (queuemode && RealUid != 0) - (void) unsetenv("HOSTALIASES"); - - /* check for sane configuration level */ - if (ConfigLevel > MAXCONFIGLEVEL) - { - syserr("Warning: .cf version level (%d) exceeds sendmail version %s functionality (%d)", - ConfigLevel, Version, MAXCONFIGLEVEL); - } - - /* need MCI cache to have persistence */ - if (HostStatDir != NULL && MaxMciCache == 0) - { - HostStatDir = NULL; - printf("Warning: HostStatusDirectory disabled with ConnectionCacheSize = 0\n"); - } - - /* need HostStatusDir in order to have SingleThreadDelivery */ - if (SingleThreadDelivery && HostStatDir == NULL) - { - SingleThreadDelivery = FALSE; - printf("Warning: HostStatusDirectory required for SingleThreadDelivery\n"); - } - - /* check for permissions */ - if ((OpMode == MD_DAEMON || OpMode == MD_PURGESTAT) && RealUid != 0) - { - if (LogLevel > 1) - sm_syslog(LOG_ALERT, NOQID, - "user %d attempted to %s", - RealUid, - OpMode == MD_DAEMON ? "run daemon" - : "purge host status"); - usrerr("Permission denied"); - exit(EX_USAGE); - } - - if (MeToo) - BlankEnvelope.e_flags |= EF_METOO; - - switch (OpMode) - { - case MD_TEST: - /* don't have persistent host status in test mode */ - HostStatDir = NULL; - Verbose = 2; - CurEnv->e_errormode = EM_PRINT; - break; - - case MD_FGDAEMON: - run_in_foreground = TRUE; - OpMode = MD_DAEMON; - /* fall through ... */ - - case MD_DAEMON: - vendor_daemon_setup(CurEnv); - - /* remove things that don't make sense in daemon mode */ - FullName = NULL; - GrabTo = FALSE; - - /* arrange to restart on hangup signal */ - if (SaveArgv[0] == NULL || SaveArgv[0][0] != '/') - sm_syslog(LOG_WARNING, NOQID, - "daemon invoked without full pathname; kill -1 won't work"); - setsignal(SIGHUP, sighup); - - /* workaround: can't seem to release the signal in the parent */ - releasesignal(SIGHUP); - break; - - case MD_INITALIAS: - Verbose = 2; - CurEnv->e_errormode = EM_PRINT; - /* fall through... */ - - case MD_PRINT: - /* to handle sendmail -bp -qSfoobar properly */ - queuemode = FALSE; - /* fall through... */ - - default: - /* arrange to exit cleanly on hangup signal */ - if (setsignal(SIGHUP, SIG_IGN) == (sigfunc_t) SIG_DFL) - setsignal(SIGHUP, intsig); - break; - } - - /* full names can't have newlines */ - if (FullName != NULL && strchr(FullName, '\n') != NULL) - FullName = newstr(denlstring(FullName, TRUE, TRUE)); - - /* 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; - } - - /* set options that were previous macros */ - if (SmtpGreeting == NULL) - { - if (ConfigLevel < 7 && (p = macvalue('e', CurEnv)) != NULL) - SmtpGreeting = newstr(p); - else - SmtpGreeting = "\201j Sendmail \201v ready at \201b"; - } - if (UnixFromLine == NULL) - { - if (ConfigLevel < 7 && (p = macvalue('l', CurEnv)) != NULL) - UnixFromLine = newstr(p); - else - UnixFromLine = "From \201g \201d"; - } - - /* our name for SMTP codes */ - expand("\201j", jbuf, sizeof jbuf, CurEnv); - MyHostName = jbuf; - if (strchr(jbuf, '.') == NULL) - message("WARNING: local host name (%s) is not qualified; fix $j in config file", - jbuf); - - /* make certain that this name is part of the $=w class */ - setclass('w', MyHostName); - - /* the indices of built-in mailers */ - st = stab("local", ST_MAILER, ST_FIND); - if (st != NULL) - LocalMailer = st->s_mailer; - else if (OpMode != MD_TEST || !warn_C_flag) - syserr("No local mailer defined"); - - st = stab("prog", ST_MAILER, ST_FIND); - if (st == NULL) - syserr("No prog mailer defined"); - else - { - ProgMailer = st->s_mailer; - clrbitn(M_MUSER, ProgMailer->m_flags); - } - - st = stab("*file*", ST_MAILER, ST_FIND); - if (st == NULL) - syserr("No *file* mailer defined"); - else - { - FileMailer = st->s_mailer; - clrbitn(M_MUSER, FileMailer->m_flags); - } - - st = stab("*include*", ST_MAILER, ST_FIND); - if (st == NULL) - syserr("No *include* mailer defined"); - else - InclMailer = st->s_mailer; - - if (ConfigLevel < 6) - { - /* heuristic tweaking of local mailer for back compat */ - if (LocalMailer != NULL) - { - setbitn(M_ALIASABLE, LocalMailer->m_flags); - setbitn(M_HASPWENT, LocalMailer->m_flags); - setbitn(M_TRYRULESET5, LocalMailer->m_flags); - setbitn(M_CHECKINCLUDE, LocalMailer->m_flags); - setbitn(M_CHECKPROG, LocalMailer->m_flags); - setbitn(M_CHECKFILE, LocalMailer->m_flags); - setbitn(M_CHECKUDB, LocalMailer->m_flags); - } - if (ProgMailer != NULL) - setbitn(M_RUNASRCPT, ProgMailer->m_flags); - if (FileMailer != NULL) - setbitn(M_RUNASRCPT, FileMailer->m_flags); - } - if (ConfigLevel < 7) - { - if (LocalMailer != NULL) - setbitn(M_VRFY250, LocalMailer->m_flags); - if (ProgMailer != NULL) - setbitn(M_VRFY250, ProgMailer->m_flags); - if (FileMailer != NULL) - setbitn(M_VRFY250, FileMailer->m_flags); - } - - /* MIME Content-Types that cannot be transfer encoded */ - setclass('n', "multipart/signed"); - - /* MIME message/xxx subtypes that can be treated as messages */ - setclass('s', "rfc822"); - - /* MIME Content-Transfer-Encodings that can be encoded */ - setclass('e', "7bit"); - setclass('e', "8bit"); - setclass('e', "binary"); - -#ifdef USE_B_CLASS - /* MIME Content-Types that should be treated as binary */ - setclass('b', "image"); - setclass('b', "audio"); - setclass('b', "video"); - setclass('b', "application/octet-stream"); -#endif - - /* operate in queue directory */ - if (QueueDir == NULL) - { - if (OpMode != MD_TEST) - { - syserr("QueueDirectory (Q) option must be set"); - ExitStat = EX_CONFIG; - } - } - else - { - /* test path to get warning messages */ - (void) safedirpath(QueueDir, (uid_t) 0, (gid_t) 0, NULL, SFF_ANYFILE); - if (OpMode != MD_TEST && chdir(QueueDir) < 0) - { - syserr("cannot chdir(%s)", QueueDir); - ExitStat = EX_CONFIG; - } - } - - /* check host status directory for validity */ - if (HostStatDir != NULL && !path_is_dir(HostStatDir, FALSE)) - { - /* cannot use this value */ - if (tTd(0, 2)) - printf("Cannot use HostStatusDirectory = %s: %s\n", - HostStatDir, errstring(errno)); - HostStatDir = NULL; - } - -# if QUEUE - if (queuemode && RealUid != 0 && bitset(PRIV_RESTRICTQRUN, PrivacyFlags)) - { - struct stat stbuf; - - /* check to see if we own the queue directory */ - if (stat(".", &stbuf) < 0) - syserr("main: cannot stat %s", QueueDir); - if (stbuf.st_uid != RealUid) - { - /* nope, really a botch */ - usrerr("You do not have permission to process the queue"); - exit (EX_NOPERM); - } - } -# endif /* QUEUE */ - - /* if we've had errors so far, exit now */ - if (ExitStat != EX_OK && OpMode != MD_TEST) - { - endpwent(); - setuid(RealUid); - exit(ExitStat); - } - -#if XDEBUG - checkfd012("before main() initmaps"); -#endif - - /* - ** Do operation-mode-dependent initialization. - */ - - switch (OpMode) - { - case MD_PRINT: - /* print the queue */ -#if QUEUE - dropenvelope(CurEnv, TRUE); - printqueue(); - endpwent(); - setuid(RealUid); - exit(EX_OK); -#else /* QUEUE */ - usrerr("No queue to print"); - finis(); -#endif /* QUEUE */ - - case MD_HOSTSTAT: - mci_traverse_persistent(mci_print_persistent, NULL); - exit(EX_OK); - break; - - case MD_PURGESTAT: - mci_traverse_persistent(mci_purge_persistent, NULL); - exit(EX_OK); - break; - - case MD_INITALIAS: - /* initialize alias database */ - initmaps(TRUE, CurEnv); - endpwent(); - setuid(RealUid); - exit(ExitStat); - - case MD_SMTP: - nullserver = FALSE; - /* fall through... */ - - case MD_DAEMON: - /* reset DSN parameters */ - DefaultNotify = QPINGONFAILURE|QPINGONDELAY; - CurEnv->e_envid = NULL; - CurEnv->e_flags &= ~(EF_RET_PARAM|EF_NO_BODY_RETN); - - /* don't open alias database -- done in srvrsmtp */ - break; - - default: - /* open the alias database */ - initmaps(FALSE, CurEnv); - break; - } - - if (tTd(0, 15)) - { - extern void printrules __P((void)); - - /* print configuration table (or at least part of it) */ - if (tTd(0, 90)) - printrules(); - for (i = 0; i < MAXMAILERS; i++) - { - if (Mailer[i] != NULL) - printmailer(Mailer[i]); - } - } - - /* - ** 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]; - SIGFUNC_DECL intindebug __P((int)); - - if (isatty(fileno(stdin))) - Verbose = 2; - - if (Verbose) - { - printf("ADDRESS TEST MODE (ruleset 3 NOT automatically invoked)\n"); - printf("Enter <ruleset> <address>\n"); - } - if (setjmp(TopFrame) > 0) - printf("\n"); - (void) setsignal(SIGINT, intindebug); - for (;;) - { - extern void testmodeline __P((char *, ENVELOPE *)); - - if (Verbose) - printf("> "); - (void) fflush(stdout); - if (fgets(buf, sizeof buf, stdin) == NULL) - finis(); - p = strchr(buf, '\n'); - if (p != NULL) - *p = '\0'; - if (!Verbose) - printf("> %s\n", buf); - testmodeline(buf, CurEnv); - } - } - -# if QUEUE - /* - ** If collecting stuff from the queue, go start doing that. - */ - - if (queuemode && OpMode != MD_DAEMON && QueueIntvl == 0) - { - (void) runqueue(FALSE, Verbose); - 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]; - extern void getrequests __P((ENVELOPE *)); - - if (!run_in_foreground && !tTd(99, 100)) - { - /* put us in background */ - i = fork(); - if (i < 0) - syserr("daemon: cannot fork"); - if (i != 0) - exit(0); - - /* disconnect from our controlling tty */ - disconnect(2, 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"); - - sm_syslog(LOG_INFO, NOQID, - "starting daemon (%s): %s", Version, dtype + 1); -#ifdef XLA - xla_create_file(); -#endif - -# if QUEUE - if (queuemode) - { - (void) runqueue(TRUE, FALSE); - if (OpMode != MD_DAEMON) - { - for (;;) - { - pause(); - if (DoQueueRun) - (void) runqueue(TRUE, FALSE); - } - } - } -# endif /* QUEUE */ - dropenvelope(CurEnv, TRUE); - -#if DAEMON - getrequests(CurEnv); - - /* drop privileges */ - (void) drop_privileges(FALSE); - - /* at this point we are in a child: reset state */ - (void) newenvelope(CurEnv, CurEnv); - - /* - ** Get authentication data - */ - - p = getauthinfo(fileno(InChannel)); - define('_', p, &BlankEnvelope); - - /* validate the connection */ - HoldErrs = TRUE; - nullserver = !validate_connection(&RealHostAddr, RealHostName, CurEnv); - HoldErrs = FALSE; -#endif /* DAEMON */ - } - -# if SMTP - /* - ** If running SMTP protocol, start collecting and executing - ** commands. This will never return. - */ - - if (OpMode == MD_SMTP || OpMode == MD_DAEMON) - { - char pbuf[20]; - extern void smtp __P((bool, ENVELOPE *)); - - /* - ** Save some macros for check_* rulesets. - */ - - define(macid("{client_name}", NULL), RealHostName, &BlankEnvelope); - define(macid("{client_addr}", NULL), - newstr(anynet_ntoa(&RealHostAddr)), &BlankEnvelope); - if (RealHostAddr.sa.sa_family == AF_INET) - snprintf(pbuf, sizeof pbuf, "%d", RealHostAddr.sin.sin_port); - else - snprintf(pbuf, sizeof pbuf, "0"); - define(macid("{client_port}", NULL), newstr(pbuf), &BlankEnvelope); - - smtp(nullserver, CurEnv); - } -# endif /* SMTP */ - - clearenvelope(CurEnv, FALSE); - if (OpMode == MD_VERIFY) - { - CurEnv->e_sendmode = SM_VERIFY; - CurEnv->e_errormode = EM_PRINT; - PostMasterCopy = NULL; - HoldErrs = FALSE; - } - else - { - /* interactive -- all errors are global */ - CurEnv->e_flags |= EF_GLOBALERRS|EF_LOGSENDER; - } - - /* - ** Do basic system initialization and set the sender - */ - - initsys(CurEnv); - if (warn_f_flag != '\0' && !wordinclass(RealUserName, 't')) - auth_warning(CurEnv, "%s set sender to %s using -%c", - RealUserName, from, warn_f_flag); - setsender(from, CurEnv, NULL, '\0', FALSE); - if (macvalue('s', CurEnv) == NULL) - define('s', RealHostName, CurEnv); - - if (*av == NULL && !GrabTo) - { - CurEnv->e_flags |= EF_GLOBALERRS; - usrerr("Recipient names must be specified"); - - /* collect body for UUCP return */ - if (OpMode != MD_VERIFY) - collect(InChannel, FALSE, NULL, CurEnv); - finis(); - } - - /* - ** 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) - { - long savedflags = CurEnv->e_flags & EF_FATALERRS; - - CurEnv->e_flags |= EF_GLOBALERRS; - CurEnv->e_flags &= ~EF_FATALERRS; - collect(InChannel, FALSE, NULL, CurEnv); - - /* bail out if message too large */ - if (bitset(EF_CLRQUEUE, CurEnv->e_flags)) - { - finis(); - /*NOTREACHED*/ - return -1; - } - CurEnv->e_flags |= savedflags; - } - errno = 0; - - 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; - CurrentLA = getla(); - sendall(CurEnv, SM_DEFAULT); - - /* - ** All done. - ** Don't send return error message if in VERIFY mode. - */ - - finis(); - /*NOTREACHED*/ - return -1; -} - - -SIGFUNC_DECL -intindebug(sig) - int sig; -{ - longjmp(TopFrame, 1); - return SIGFUNC_RETURN; -} - - - /* -** FINIS -- Clean up and exit. -** -** Parameters: -** none -** -** Returns: -** never -** -** Side Effects: -** exits sendmail -*/ - -void -finis() -{ - if (tTd(2, 1)) - { - extern void printenvflags(); - - printf("\n====finis: stat %d e_id=%s e_flags=", - ExitStat, - CurEnv->e_id == NULL ? "NOQUEUE" : CurEnv->e_id); - printenvflags(CurEnv); - } - if (tTd(2, 9)) - printopenfds(FALSE); - - /* if we fail in finis(), just exit */ - if (setjmp(TopFrame) != 0) - { - /* failed -- just give it up */ - goto forceexit; - } - - /* clean up temp files */ - CurEnv->e_to = NULL; - if (CurEnv->e_id != NULL) - dropenvelope(CurEnv, TRUE); - - /* flush any cached connections */ - mci_flush(TRUE, NULL); - -# ifdef XLA - /* clean up extended load average stuff */ - xla_all_end(); -# endif - - /* and exit */ - forceexit: - if (LogLevel > 78) - sm_syslog(LOG_DEBUG, CurEnv->e_id, - "finis, pid=%d", - getpid()); - if (ExitStat == EX_TEMPFAIL || CurEnv->e_errormode == EM_BERKNET) - ExitStat = EX_OK; - - /* reset uid for process accounting */ - endpwent(); - setuid(RealUid); - - exit(ExitStat); -} - /* -** 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. -*/ - -SIGFUNC_DECL -intsig(sig) - int sig; -{ - if (LogLevel > 79) - sm_syslog(LOG_DEBUG, CurEnv->e_id, "interrupt"); - FileName = NULL; - unlockqueue(CurEnv); -#ifdef XLA - xla_all_end(); -#endif - - /* reset uid for process accounting */ - endpwent(); - setuid(RealUid); - - exit(EX_OK); -} - /* -** 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' } -}; - -#define MACBINDING(name, mid) \ - stab(name, ST_MACRO, ST_ENTER)->s_macro = mid; \ - MacroName[mid] = name; - -void -initmacros(e) - register ENVELOPE *e; -{ - register struct metamac *m; - register int c; - char buf[5]; - extern char *MacroName[256]; - - for (m = MetaMacros; m->metaname != '\0'; m++) - { - buf[0] = m->metaval; - buf[1] = '\0'; - define(m->metaname, newstr(buf), e); - } - buf[0] = MATCHREPL; - buf[2] = '\0'; - for (c = '0'; c <= '9'; c++) - { - buf[1] = c; - define(c, newstr(buf), e); - } - - /* set defaults for some macros sendmail will use later */ - define('n', "MAILER-DAEMON", e); - - /* set up external names for some internal macros */ - MACBINDING("opMode", MID_OPMODE); - /*XXX should probably add equivalents for all short macros here XXX*/ -} - /* -** DISCONNECT -- remove our connection with any foreground process -** -** Parameters: -** droplev -- how "deeply" we should drop the line. -** 0 -- ignore signals, mail back errors, make sure -** output goes to stdout. -** 1 -- also, make stdout go to transcript. -** 2 -- also, disconnect from controlling terminal -** (only for daemon mode). -** e -- the current envelope. -** -** Returns: -** none -** -** Side Effects: -** Trys to insure that we are immune to vagaries of -** the controlling tty. -*/ - -void -disconnect(droplev, e) - int droplev; - register ENVELOPE *e; -{ - int fd; - - if (tTd(52, 1)) - printf("disconnect: In %d Out %d, e=%lx\n", - fileno(InChannel), fileno(OutChannel), (u_long) e); - if (tTd(52, 100)) - { - printf("don't\n"); - return; - } - if (LogLevel > 93) - sm_syslog(LOG_DEBUG, e->e_id, - "disconnect level %d", - droplev); - - /* be sure we don't get nasty signals */ - (void) setsignal(SIGINT, SIG_IGN); - (void) setsignal(SIGQUIT, SIG_IGN); - - /* we can't communicate with our caller, so.... */ - HoldErrs = TRUE; - CurEnv->e_errormode = EM_MAIL; - Verbose = 0; - DisConnected = TRUE; - - /* 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 (droplev > 0) - { - 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 (droplev > 1) - { - (void) setsid(); - errno = 0; - } - -#if XDEBUG - checkfd012("disconnect"); -#endif - - if (LogLevel > 71) - sm_syslog(LOG_DEBUG, e->e_id, - "in background, pid=%d", - getpid()); - - errno = 0; -} - -static void -obsolete(argv) - char *argv[]; -{ - register char *ap; - register char *op; - - while ((ap = *++argv) != NULL) - { - /* Return if "--" or not an option of any form. */ - if (ap[0] != '-' || ap[1] == '-') - return; - - /* skip over options that do have a value */ - op = strchr(OPTIONS, ap[1]); - if (op != NULL && *++op == ':' && ap[2] == '\0' && - ap[1] != 'd' && -#if defined(sony_news) - ap[1] != 'E' && ap[1] != 'J' && -#endif - argv[1] != NULL && argv[1][0] != '-') - { - argv++; - continue; - } - - /* If -C doesn't have an argument, use sendmail.cf. */ -#define __DEFPATH "sendmail.cf" - if (ap[1] == 'C' && ap[2] == '\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 = "-q0"; - - /* if -d doesn't have an argument, use 0-99.1 */ - if (ap[1] == 'd' && ap[2] == '\0') - *argv = "-d0-99.1"; - -# if defined(sony_news) - /* if -E doesn't have an argument, use -EC */ - if (ap[1] == 'E' && ap[2] == '\0') - *argv = "-EC"; - - /* if -J doesn't have an argument, use -JJ */ - if (ap[1] == 'J' && ap[2] == '\0') - *argv = "-JJ"; -# endif - } -} - /* -** 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 struct hostent *myhostname(); - - if (hostbuf[0] == '\0') - (void) myhostname(hostbuf, sizeof hostbuf); - - (void) snprintf(buf, sizeof buf, "%s: ", hostbuf); - p = &buf[strlen(buf)]; - VA_START(msg); - vsnprintf(p, SPACELEFT(buf, p), msg, ap); - VA_END; - addheader("X-Authentication-Warning", buf, &e->e_header); - if (LogLevel > 3) - sm_syslog(LOG_INFO, e->e_id, - "Authentication-Warning: %.400s", - buf); - } -} - /* -** GETEXTENV -- get from external environment -** -** Parameters: -** envar -- the name of the variable to retrieve -** -** Returns: -** The value, if any. -*/ - -char * -getextenv(envar) - const char *envar; -{ - char **envp; - int l; - - l = strlen(envar); - for (envp = ExternalEnviron; *envp != NULL; envp++) - { - if (strncmp(*envp, envar, l) == 0 && (*envp)[l] == '=') - return &(*envp)[l + 1]; - } - return NULL; -} - /* -** SETUSERENV -- set an environment in the propogated environment -** -** Parameters: -** envar -- the name of the environment variable. -** value -- the value to which it should be set. If -** null, this is extracted from the incoming -** environment. If that is not set, the call -** to setuserenv is ignored. -** -** Returns: -** none. -*/ - -void -setuserenv(envar, value) - const char *envar; - const char *value; -{ - int i; - char **evp = UserEnviron; - char *p; - - if (value == NULL) - { - value = getextenv(envar); - if (value == NULL) - return; - } - - i = strlen(envar); - p = (char *) xalloc(strlen(value) + i + 2); - strcpy(p, envar); - p[i++] = '='; - strcpy(&p[i], value); - - while (*evp != NULL && strncmp(*evp, p, i) != 0) - evp++; - if (*evp != NULL) - { - *evp++ = p; - } - else if (evp < &UserEnviron[MAXUSERENVIRON]) - { - *evp++ = p; - *evp = NULL; - } - - /* make sure it is in our environment as well */ - if (putenv(p) < 0) - syserr("setuserenv: putenv(%s) failed", p); -} - /* -** DUMPSTATE -- dump state -** -** For debugging. -*/ - -void -dumpstate(when) - char *when; -{ - register char *j = macvalue('j', CurEnv); - int rs; - - sm_syslog(LOG_DEBUG, CurEnv->e_id, - "--- dumping state on %s: $j = %s ---", - when, - j == NULL ? "<NULL>" : j); - if (j != NULL) - { - if (!wordinclass(j, 'w')) - sm_syslog(LOG_DEBUG, CurEnv->e_id, - "*** $j not in $=w ***"); - } - sm_syslog(LOG_DEBUG, CurEnv->e_id, "CurChildren = %d", CurChildren); - sm_syslog(LOG_DEBUG, CurEnv->e_id, "--- open file descriptors: ---"); - printopenfds(TRUE); - sm_syslog(LOG_DEBUG, CurEnv->e_id, "--- connection cache: ---"); - mci_dump_all(TRUE); - rs = strtorwset("debug_dumpstate", NULL, ST_FIND); - if (rs > 0) - { - int stat; - register char **pvp; - char *pv[MAXATOM + 1]; - - pv[0] = NULL; - stat = rewrite(pv, rs, 0, CurEnv); - sm_syslog(LOG_DEBUG, CurEnv->e_id, - "--- ruleset debug_dumpstate returns stat %d, pv: ---", - stat); - for (pvp = pv; *pvp != NULL; pvp++) - sm_syslog(LOG_DEBUG, CurEnv->e_id, "%s", *pvp); - } - sm_syslog(LOG_DEBUG, CurEnv->e_id, "--- end of state dump ---"); -} - - -SIGFUNC_DECL -sigusr1(sig) - int sig; -{ - dumpstate("user signal"); - return SIGFUNC_RETURN; -} - - -SIGFUNC_DECL -sighup(sig) - int sig; -{ - if (SaveArgv[0][0] != '/') - { - if (LogLevel > 3) - sm_syslog(LOG_INFO, NOQID, "could not restart: need full path"); - exit(EX_OSFILE); - } - if (LogLevel > 3) - sm_syslog(LOG_INFO, NOQID, "restarting %s on signal", SaveArgv[0]); - alarm(0); - releasesignal(SIGHUP); - if (drop_privileges(TRUE) != EX_OK) - { - if (LogLevel > 0) - sm_syslog(LOG_ALERT, NOQID, "could not set[ug]id(%d, %d): %m", - RunAsUid, RunAsGid); - exit(EX_OSERR); - } - execve(SaveArgv[0], (ARGV_T) SaveArgv, (ARGV_T) ExternalEnviron); - if (LogLevel > 0) - sm_syslog(LOG_ALERT, NOQID, "could not exec %s: %m", SaveArgv[0]); - exit(EX_OSFILE); -} - /* -** DROP_PRIVILEGES -- reduce privileges to those of the RunAsUser option -** -** Parameters: -** to_real_uid -- if set, drop to the real uid instead -** of the RunAsUser. -** -** Returns: -** EX_OSERR if the setuid failed. -** EX_OK otherwise. -*/ - -int -drop_privileges(to_real_uid) - bool to_real_uid; -{ - int rval = EX_OK; -#ifdef NGROUPS_MAX - GIDSET_T emptygidset[NGROUPS_MAX]; -#endif - - if (tTd(47, 1)) - printf("drop_privileges(%d): Real[UG]id=%d:%d, RunAs[UG]id=%d:%d\n", - to_real_uid, RealUid, RealGid, RunAsUid, RunAsGid); - - if (to_real_uid) - { - RunAsUserName = RealUserName; - RunAsUid = RealUid; - RunAsGid = RealGid; - } - - /* make sure no one can grab open descriptors for secret files */ - endpwent(); - -#ifdef NGROUPS_MAX - /* reset group permissions; these can be set later */ - emptygidset[0] = (to_real_uid || RunAsGid != 0) ? RunAsGid : getegid(); - (void) setgroups(1, emptygidset); -#endif - - /* reset primary group and user id */ - if ((to_real_uid || RunAsGid != 0) && setgid(RunAsGid) < 0) - rval = EX_OSERR; - if ((to_real_uid || RunAsUid != 0) && setuid(RunAsUid) < 0) - rval = EX_OSERR; - return rval; -} - /* -** FILL_FD -- make sure a file descriptor has been properly allocated -** -** Used to make sure that stdin/out/err are allocated on startup -** -** Parameters: -** fd -- the file descriptor to be filled. -** where -- a string used for logging. If NULL, this is -** being called on startup, and logging should -** not be done. -** -** Returns: -** none -*/ - -void -fill_fd(fd, where) - int fd; - char *where; -{ - int i; - struct stat stbuf; - - if (fstat(fd, &stbuf) >= 0 || errno != EBADF) - return; - - if (where != NULL) - syserr("fill_fd: %s: fd %d not open", where, fd); - else - MissingFds |= 1 << fd; - i = open("/dev/null", fd == 0 ? O_RDONLY : O_WRONLY, 0666); - if (i < 0) - { - syserr("!fill_fd: %s: cannot open /dev/null", - where == NULL ? "startup" : where); - } - if (fd != i) - { - (void) dup2(i, fd); - (void) close(i); - } -} - /* -** TESTMODELINE -- process a test mode input line -** -** Parameters: -** line -- the input line. -** e -- the current environment. -** Syntax: -** # a comment -** .X process X as a configuration line -** =X dump a configuration item (such as mailers) -** $X dump a macro or class -** /X try an activity -** X normal process through rule set X -*/ - -void -testmodeline(line, e) - char *line; - ENVELOPE *e; -{ - register char *p; - char *q; - auto char *delimptr; - int mid; - int i, rs; - STAB *map; - char **s; - struct rewrite *rw; - ADDRESS a; - static int tryflags = RF_COPYNONE; - char exbuf[MAXLINE]; - extern bool invalidaddr __P((char *, char *)); - extern char *crackaddr __P((char *)); - extern void dump_class __P((STAB *, int)); - extern void translate_dollars __P((char *)); - extern void help __P((char *)); - - switch (line[0]) - { - case '#': - case 0: - return; - - case '?': - help("-bt"); - return; - - case '.': /* config-style settings */ - switch (line[1]) - { - case 'D': - mid = macid(&line[2], &delimptr); - if (mid == '\0') - return; - translate_dollars(delimptr); - define(mid, newstr(delimptr), e); - break; - - case 'C': - if (line[2] == '\0') /* not to call syserr() */ - return; - - mid = macid(&line[2], &delimptr); - if (mid == '\0') - return; - translate_dollars(delimptr); - expand(delimptr, exbuf, sizeof exbuf, e); - p = exbuf; - while (*p != '\0') - { - register char *wd; - char delim; - - while (*p != '\0' && isascii(*p) && isspace(*p)) - p++; - wd = p; - while (*p != '\0' && !(isascii(*p) && isspace(*p))) - p++; - delim = *p; - *p = '\0'; - if (wd[0] != '\0') - setclass(mid, wd); - *p = delim; - } - break; - - case '\0': - printf("Usage: .[DC]macro value(s)\n"); - break; - - default: - printf("Unknown \".\" command %s\n", line); - break; - } - return; - - case '=': /* config-style settings */ - switch (line[1]) - { - case 'S': /* dump rule set */ - rs = strtorwset(&line[2], NULL, ST_FIND); - if (rs < 0) - { - printf("Undefined ruleset %s\n", &line[2]); - return; - } - rw = RewriteRules[rs]; - if (rw == NULL) - return; - do - { - putchar('R'); - s = rw->r_lhs; - while (*s != NULL) - { - xputs(*s++); - putchar(' '); - } - putchar('\t'); - putchar('\t'); - s = rw->r_rhs; - while (*s != NULL) - { - xputs(*s++); - putchar(' '); - } - putchar('\n'); - } while ((rw = rw->r_next) != NULL); - break; - - case 'M': - for (i = 0; i < MAXMAILERS; i++) - { - if (Mailer[i] != NULL) - printmailer(Mailer[i]); - } - break; - - case '\0': - printf("Usage: =Sruleset or =M\n"); - break; - - default: - printf("Unknown \"=\" command %s\n", line); - break; - } - return; - - case '-': /* set command-line-like opts */ - switch (line[1]) - { - case 'd': - tTflag(&line[2]); - break; - - case '\0': - printf("Usage: -d{debug arguments}\n"); - break; - - default: - printf("Unknown \"-\" command %s\n", line); - break; - } - return; - - case '$': - if (line[1] == '=') - { - mid = macid(&line[2], NULL); - if (mid != '\0') - stabapply(dump_class, mid); - return; - } - mid = macid(&line[1], NULL); - if (mid == '\0') - return; - p = macvalue(mid, e); - if (p == NULL) - printf("Undefined\n"); - else - { - xputs(p); - printf("\n"); - } - return; - - case '/': /* miscellaneous commands */ - p = &line[strlen(line)]; - while (--p >= line && isascii(*p) && isspace(*p)) - *p = '\0'; - p = strpbrk(line, " \t"); - if (p != NULL) - { - while (isascii(*p) && isspace(*p)) - *p++ = '\0'; - } - else - p = ""; - if (line[1] == '\0') - { - printf("Usage: /[canon|map|mx|parse|try|tryflags]\n"); - return; - } - if (strcasecmp(&line[1], "mx") == 0) - { -#if NAMED_BIND - /* look up MX records */ - int nmx; - auto int rcode; - char *mxhosts[MAXMXHOSTS + 1]; - - if (*p == '\0') - { - printf("Usage: /mx address\n"); - return; - } - nmx = getmxrr(p, mxhosts, FALSE, &rcode); - printf("getmxrr(%s) returns %d value(s):\n", p, nmx); - for (i = 0; i < nmx; i++) - printf("\t%s\n", mxhosts[i]); -#else - printf("No MX code compiled in\n"); -#endif - } - else if (strcasecmp(&line[1], "canon") == 0) - { - char host[MAXHOSTNAMELEN]; - - if (*p == '\0') - { - printf("Usage: /canon address\n"); - return; - } - else if (strlen(p) >= sizeof host) - { - printf("Name too long\n"); - return; - } - strcpy(host, p); - (void) getcanonname(host, sizeof(host), HasWildcardMX); - printf("getcanonname(%s) returns %s\n", p, host); - } - else if (strcasecmp(&line[1], "map") == 0) - { - auto int rcode = EX_OK; - - if (*p == '\0') - { - printf("Usage: /map mapname key\n"); - return; - } - for (q = p; *q != '\0' && !isspace(*q); q++) - continue; - if (*q == '\0') - { - printf("No key specified\n"); - return; - } - *q++ = '\0'; - map = stab(p, ST_MAP, ST_FIND); - if (map == NULL) - { - printf("Map named \"%s\" not found\n", p); - return; - } - if (!bitset(MF_OPEN, map->s_map.map_mflags)) - { - printf("Map named \"%s\" not open\n", p); - return; - } - printf("map_lookup: %s (%s) ", p, q); - p = (*map->s_map.map_class->map_lookup) - (&map->s_map, q, NULL, &rcode); - if (p == NULL) - printf("no match (%d)\n", rcode); - else - printf("returns %s (%d)\n", p, rcode); - } - else if (strcasecmp(&line[1], "try") == 0) - { - MAILER *m; - STAB *s; - auto int rcode = EX_OK; - - q = strpbrk(p, " \t"); - if (q != NULL) - { - while (isascii(*q) && isspace(*q)) - *q++ = '\0'; - } - if (q == NULL || *q == '\0') - { - printf("Usage: /try mailer address\n"); - return; - } - s = stab(p, ST_MAILER, ST_FIND); - if (s == NULL) - { - printf("Unknown mailer %s\n", p); - return; - } - m = s->s_mailer; - printf("Trying %s %s address %s for mailer %s\n", - bitset(RF_HEADERADDR, tryflags) ? "header" : "envelope", - bitset(RF_SENDERADDR, tryflags) ? "sender" : "recipient", - q, p); - p = remotename(q, m, tryflags, &rcode, CurEnv); - printf("Rcode = %d, addr = %s\n", - rcode, p == NULL ? "<NULL>" : p); - e->e_to = NULL; - } - else if (strcasecmp(&line[1], "tryflags") == 0) - { - if (*p == '\0') - { - printf("Usage: /tryflags [Hh|Ee][Ss|Rr]\n"); - return; - } - for (; *p != '\0'; p++) - { - switch (*p) - { - case 'H': - case 'h': - tryflags |= RF_HEADERADDR; - break; - - case 'E': - case 'e': - tryflags &= ~RF_HEADERADDR; - break; - - case 'S': - case 's': - tryflags |= RF_SENDERADDR; - break; - - case 'R': - case 'r': - tryflags &= ~RF_SENDERADDR; - break; - } - } - } - else if (strcasecmp(&line[1], "parse") == 0) - { - if (*p == '\0') - { - printf("Usage: /parse address\n"); - return; - } - q = crackaddr(p); - printf("Cracked address = "); - xputs(q); - printf("\nParsing %s %s address\n", - bitset(RF_HEADERADDR, tryflags) ? "header" : "envelope", - bitset(RF_SENDERADDR, tryflags) ? "sender" : "recipient"); - if (parseaddr(p, &a, tryflags, '\0', NULL, e) == NULL) - printf("Cannot parse\n"); - else if (a.q_host != NULL && a.q_host[0] != '\0') - printf("mailer %s, host %s, user %s\n", - a.q_mailer->m_name, a.q_host, a.q_user); - else - printf("mailer %s, user %s\n", - a.q_mailer->m_name, a.q_user); - e->e_to = NULL; - } - else - { - printf("Unknown \"/\" command %s\n", line); - } - return; - } - - for (p = line; isascii(*p) && isspace(*p); p++) - continue; - q = p; - while (*p != '\0' && !(isascii(*p) && isspace(*p))) - p++; - if (*p == '\0') - { - printf("No address!\n"); - return; - } - *p = '\0'; - if (invalidaddr(p + 1, NULL)) - return; - do - { - register char **pvp; - char pvpbuf[PSBUFSIZE]; - - pvp = prescan(++p, ',', pvpbuf, sizeof pvpbuf, - &delimptr, NULL); - if (pvp == NULL) - continue; - p = q; - while (*p != '\0') - { - int stat; - int rs = strtorwset(p, NULL, ST_FIND); - - if (rs < 0) - { - printf("Undefined ruleset %s\n", p); - break; - } - stat = rewrite(pvp, rs, 0, e); - if (stat != EX_OK) - printf("== Ruleset %s (%d) status %d\n", - p, rs, stat); - while (*p != '\0' && *p++ != ',') - continue; - } - } while (*(p = delimptr) != '\0'); -} - - -void -dump_class(s, id) - register STAB *s; - int id; -{ - if (s->s_type != ST_CLASS) - return; - if (bitnset(id & 0xff, s->s_class)) - printf("%s\n", s->s_name); -} |
