Return to envelope.c CVS log

Up to [CSRG BSD Unix] / 43BSDReno / usr.sbin / sendmail / src

Annotation of 43BSDReno/usr.sbin/sendmail/src/envelope.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1983 Eric P. Allman
        !             3:  * Copyright (c) 1988 Regents of the University of California.
        !             4:  * All rights reserved.
        !             5:  *
        !             6:  * Redistribution and use in source and binary forms are permitted provided
        !             7:  * that: (1) source distributions retain this entire copyright notice and
        !             8:  * comment, and (2) distributions including binaries display the following
        !             9:  * acknowledgement:  ``This product includes software developed by the
        !            10:  * University of California, Berkeley and its contributors'' in the
        !            11:  * documentation or other materials provided with the distribution and in
        !            12:  * all advertising materials mentioning features or use of this software.
        !            13:  * Neither the name of the University nor the names of its contributors may
        !            14:  * be used to endorse or promote products derived from this software without
        !            15:  * specific prior written permission.
        !            16:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            17:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            18:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            19:  */
        !            20: 
        !            21: #ifndef lint
        !            22: static char sccsid[] = "@(#)envelope.c 5.22 (Berkeley) 6/1/90";
        !            23: #endif /* not lint */
        !            24: 
        !            25: #include <sys/types.h>
        !            26: #include <sys/time.h>
        !            27: #include <sys/stat.h>
        !            28: #include <pwd.h>
        !            29: #include <sys/file.h>
        !            30: #include "sendmail.h"
        !            31: 
        !            32: /*
        !            33: **  NEWENVELOPE -- allocate a new envelope
        !            34: **
        !            35: **     Supports inheritance.
        !            36: **
        !            37: **     Parameters:
        !            38: **             e -- the new envelope to fill in.
        !            39: **
        !            40: **     Returns:
        !            41: **             e.
        !            42: **
        !            43: **     Side Effects:
        !            44: **             none.
        !            45: */
        !            46: 
        !            47: ENVELOPE *
        !            48: newenvelope(e)
        !            49:        register ENVELOPE *e;
        !            50: {
        !            51:        register ENVELOPE *parent;
        !            52:        extern putheader(), putbody();
        !            53:        extern ENVELOPE BlankEnvelope;
        !            54: 
        !            55:        parent = CurEnv;
        !            56:        if (e == CurEnv)
        !            57:                parent = e->e_parent;
        !            58:        clearenvelope(e, TRUE);
        !            59:        if (e == CurEnv)
        !            60:                bcopy((char *) &NullAddress, (char *) &e->e_from, sizeof e->e_from);
        !            61:        else
        !            62:                bcopy((char *) &CurEnv->e_from, (char *) &e->e_from, sizeof e->e_from);
        !            63:        e->e_parent = parent;
        !            64:        e->e_ctime = curtime();
        !            65:        e->e_msgpriority = parent->e_msgsize;
        !            66:        e->e_puthdr = putheader;
        !            67:        e->e_putbody = putbody;
        !            68:        if (CurEnv->e_xfp != NULL)
        !            69:                (void) fflush(CurEnv->e_xfp);
        !            70: 
        !            71:        return (e);
        !            72: }
        !            73: /*
        !            74: **  DROPENVELOPE -- deallocate an envelope.
        !            75: **
        !            76: **     Parameters:
        !            77: **             e -- the envelope to deallocate.
        !            78: **
        !            79: **     Returns:
        !            80: **             none.
        !            81: **
        !            82: **     Side Effects:
        !            83: **             housekeeping necessary to dispose of an envelope.
        !            84: **             Unlocks this queue file.
        !            85: */
        !            86: 
        !            87: dropenvelope(e)
        !            88:        register ENVELOPE *e;
        !            89: {
        !            90:        bool queueit = FALSE;
        !            91:        register ADDRESS *q;
        !            92: 
        !            93:        if (tTd(50, 1))
        !            94:        {
        !            95:                printf("dropenvelope %x id=", e);
        !            96:                xputs(e->e_id);
        !            97:                printf(" flags=%o\n", e->e_flags);
        !            98:        }
        !            99: #ifdef LOG
        !           100:        if (LogLevel > 10)
        !           101:                syslog(LOG_DEBUG, "dropenvelope, id=%s, flags=%o, pid=%d",
        !           102:                                  e->e_id == NULL ? "(none)" : e->e_id,
        !           103:                                  e->e_flags, getpid());
        !           104: #endif LOG
        !           105: 
        !           106:        /* we must have an id to remove disk files */
        !           107:        if (e->e_id == NULL)
        !           108:                return;
        !           109: 
        !           110:        /*
        !           111:        **  Extract state information from dregs of send list.
        !           112:        */
        !           113: 
        !           114:        for (q = e->e_sendqueue; q != NULL; q = q->q_next)
        !           115:        {
        !           116:                if (bitset(QQUEUEUP, q->q_flags))
        !           117:                        queueit = TRUE;
        !           118:        }
        !           119: 
        !           120:        /*
        !           121:        **  Send back return receipts as requested.
        !           122:        */
        !           123: 
        !           124:        if (e->e_receiptto != NULL && bitset(EF_SENDRECEIPT, e->e_flags))
        !           125:        {
        !           126:                auto ADDRESS *rlist = NULL;
        !           127: 
        !           128:                sendtolist(CurEnv->e_receiptto, (ADDRESS *) NULL, &rlist);
        !           129:                (void) returntosender("Return receipt", rlist, FALSE);
        !           130:        }
        !           131: 
        !           132:        /*
        !           133:        **  Arrange to send error messages if there are fatal errors.
        !           134:        */
        !           135: 
        !           136:        if (bitset(EF_FATALERRS|EF_TIMEOUT, e->e_flags) && ErrorMode != EM_QUIET)
        !           137:                savemail(e);
        !           138: 
        !           139:        /*
        !           140:        **  Instantiate or deinstantiate the queue.
        !           141:        */
        !           142: 
        !           143:        if ((!queueit && !bitset(EF_KEEPQUEUE, e->e_flags)) ||
        !           144:            bitset(EF_CLRQUEUE, e->e_flags))
        !           145:        {
        !           146:                if (e->e_df != NULL)
        !           147:                        xunlink(e->e_df);
        !           148:                xunlink(queuename(e, 'q'));
        !           149:        }
        !           150:        else if (queueit || !bitset(EF_INQUEUE, e->e_flags))
        !           151:        {
        !           152: #ifdef QUEUE
        !           153:                FILE *lockfp, *queueup();
        !           154:                lockfp = queueup(e, FALSE, FALSE);
        !           155:                if (lockfp != NULL)
        !           156:                        (void) fclose(lockfp);
        !           157: #else QUEUE
        !           158:                syserr("dropenvelope: queueup");
        !           159: #endif QUEUE
        !           160:        }
        !           161: 
        !           162:        /* now unlock the job */
        !           163:        closexscript(e);
        !           164:        unlockqueue(e);
        !           165: 
        !           166:        /* make sure that this envelope is marked unused */
        !           167:        e->e_id = e->e_df = NULL;
        !           168:        if (e->e_dfp != NULL)
        !           169:                (void) fclose(e->e_dfp);
        !           170:        e->e_dfp = NULL;
        !           171: }
        !           172: /*
        !           173: **  CLEARENVELOPE -- clear an envelope without unlocking
        !           174: **
        !           175: **     This is normally used by a child process to get a clean
        !           176: **     envelope without disturbing the parent.
        !           177: **
        !           178: **     Parameters:
        !           179: **             e -- the envelope to clear.
        !           180: **             fullclear - if set, the current envelope is total
        !           181: **                     garbage and should be ignored; otherwise,
        !           182: **                     release any resources it may indicate.
        !           183: **
        !           184: **     Returns:
        !           185: **             none.
        !           186: **
        !           187: **     Side Effects:
        !           188: **             Closes files associated with the envelope.
        !           189: **             Marks the envelope as unallocated.
        !           190: */
        !           191: 
        !           192: clearenvelope(e, fullclear)
        !           193:        register ENVELOPE *e;
        !           194:        bool fullclear;
        !           195: {
        !           196:        register HDR *bh;
        !           197:        register HDR **nhp;
        !           198:        extern ENVELOPE BlankEnvelope;
        !           199: 
        !           200:        if (!fullclear)
        !           201:        {
        !           202:                /* clear out any file information */
        !           203:                if (e->e_xfp != NULL)
        !           204:                        (void) fclose(e->e_xfp);
        !           205:                if (e->e_dfp != NULL)
        !           206:                        (void) fclose(e->e_dfp);
        !           207:        }
        !           208: 
        !           209:        /* now clear out the data */
        !           210:        STRUCTCOPY(BlankEnvelope, *e);
        !           211:        bh = BlankEnvelope.e_header;
        !           212:        nhp = &e->e_header;
        !           213:        while (bh != NULL)
        !           214:        {
        !           215:                *nhp = (HDR *) xalloc(sizeof *bh);
        !           216:                bcopy((char *) bh, (char *) *nhp, sizeof *bh);
        !           217:                bh = bh->h_link;
        !           218:                nhp = &(*nhp)->h_link;
        !           219:        }
        !           220: }
        !           221: /*
        !           222: **  INITSYS -- initialize instantiation of system
        !           223: **
        !           224: **     In Daemon mode, this is done in the child.
        !           225: **
        !           226: **     Parameters:
        !           227: **             none.
        !           228: **
        !           229: **     Returns:
        !           230: **             none.
        !           231: **
        !           232: **     Side Effects:
        !           233: **             Initializes the system macros, some global variables,
        !           234: **             etc.  In particular, the current time in various
        !           235: **             forms is set.
        !           236: */
        !           237: 
        !           238: initsys()
        !           239: {
        !           240:        static char cbuf[5];                    /* holds hop count */
        !           241:        static char pbuf[10];                   /* holds pid */
        !           242: #ifdef TTYNAME
        !           243:        static char ybuf[10];                   /* holds tty id */
        !           244:        register char *p;
        !           245: #endif TTYNAME
        !           246:        extern char *ttyname();
        !           247:        extern char *macvalue();
        !           248:        extern char Version[];
        !           249: 
        !           250:        /*
        !           251:        **  Give this envelope a reality.
        !           252:        **      I.e., an id, a transcript, and a creation time.
        !           253:        */
        !           254: 
        !           255:        openxscript(CurEnv);
        !           256:        CurEnv->e_ctime = curtime();
        !           257: 
        !           258:        /*
        !           259:        **  Set OutChannel to something useful if stdout isn't it.
        !           260:        **      This arranges that any extra stuff the mailer produces
        !           261:        **      gets sent back to the user on error (because it is
        !           262:        **      tucked away in the transcript).
        !           263:        */
        !           264: 
        !           265:        if (OpMode == MD_DAEMON && QueueRun)
        !           266:                OutChannel = CurEnv->e_xfp;
        !           267: 
        !           268:        /*
        !           269:        **  Set up some basic system macros.
        !           270:        */
        !           271: 
        !           272:        /* process id */
        !           273:        (void) sprintf(pbuf, "%d", getpid());
        !           274:        define('p', pbuf, CurEnv);
        !           275: 
        !           276:        /* hop count */
        !           277:        (void) sprintf(cbuf, "%d", CurEnv->e_hopcount);
        !           278:        define('c', cbuf, CurEnv);
        !           279: 
        !           280:        /* time as integer, unix time, arpa time */
        !           281:        settime();
        !           282: 
        !           283: #ifdef TTYNAME
        !           284:        /* tty name */
        !           285:        if (macvalue('y', CurEnv) == NULL)
        !           286:        {
        !           287:                p = ttyname(2);
        !           288:                if (p != NULL)
        !           289:                {
        !           290:                        if (rindex(p, '/') != NULL)
        !           291:                                p = rindex(p, '/') + 1;
        !           292:                        (void) strcpy(ybuf, p);
        !           293:                        define('y', ybuf, CurEnv);
        !           294:                }
        !           295:        }
        !           296: #endif TTYNAME
        !           297: }
        !           298: /*
        !           299: **  SETTIME -- set the current time.
        !           300: **
        !           301: **     Parameters:
        !           302: **             none.
        !           303: **
        !           304: **     Returns:
        !           305: **             none.
        !           306: **
        !           307: **     Side Effects:
        !           308: **             Sets the various time macros -- $a, $b, $d, $t.
        !           309: */
        !           310: 
        !           311: settime()
        !           312: {
        !           313:        register char *p;
        !           314:        auto time_t now;
        !           315:        static char tbuf[20];                   /* holds "current" time */
        !           316:        static char dbuf[30];                   /* holds ctime(tbuf) */
        !           317:        register struct tm *tm;
        !           318:        extern char *arpadate();
        !           319:        extern struct tm *gmtime();
        !           320:        extern char *macvalue();
        !           321: 
        !           322:        now = curtime();
        !           323:        tm = gmtime(&now);
        !           324:        (void) sprintf(tbuf, "%02d%02d%02d%02d%02d", tm->tm_year, tm->tm_mon+1,
        !           325:                        tm->tm_mday, tm->tm_hour, tm->tm_min);
        !           326:        define('t', tbuf, CurEnv);
        !           327:        (void) strcpy(dbuf, ctime(&now));
        !           328:        *index(dbuf, '\n') = '\0';
        !           329:        if (macvalue('d', CurEnv) == NULL)
        !           330:                define('d', dbuf, CurEnv);
        !           331:        p = newstr(arpadate(dbuf));
        !           332:        if (macvalue('a', CurEnv) == NULL)
        !           333:                define('a', p, CurEnv);
        !           334:        define('b', p, CurEnv);
        !           335: }
        !           336: /*
        !           337: **  OPENXSCRIPT -- Open transcript file
        !           338: **
        !           339: **     Creates a transcript file for possible eventual mailing or
        !           340: **     sending back.
        !           341: **
        !           342: **     Parameters:
        !           343: **             e -- the envelope to create the transcript in/for.
        !           344: **
        !           345: **     Returns:
        !           346: **             none
        !           347: **
        !           348: **     Side Effects:
        !           349: **             Creates the transcript file.
        !           350: */
        !           351: 
        !           352: openxscript(e)
        !           353:        register ENVELOPE *e;
        !           354: {
        !           355:        register char *p;
        !           356:        int fd;
        !           357: 
        !           358: # ifdef LOG
        !           359:        if (LogLevel > 19)
        !           360:                syslog(LOG_DEBUG, "%s: openx%s", e->e_id, e->e_xfp == NULL ? "" : " (no)");
        !           361: # endif LOG
        !           362:        if (e->e_xfp != NULL)
        !           363:                return;
        !           364:        p = queuename(e, 'x');
        !           365:        fd = open(p, O_WRONLY|O_CREAT, 0644);
        !           366:        if (fd < 0)
        !           367:                syserr("Can't create %s", p);
        !           368:        else
        !           369:                e->e_xfp = fdopen(fd, "w");
        !           370: }
        !           371: /*
        !           372: **  CLOSEXSCRIPT -- close the transcript file.
        !           373: **
        !           374: **     Parameters:
        !           375: **             e -- the envelope containing the transcript to close.
        !           376: **
        !           377: **     Returns:
        !           378: **             none.
        !           379: **
        !           380: **     Side Effects:
        !           381: **             none.
        !           382: */
        !           383: 
        !           384: closexscript(e)
        !           385:        register ENVELOPE *e;
        !           386: {
        !           387:        if (e->e_xfp == NULL)
        !           388:                return;
        !           389:        (void) fclose(e->e_xfp);
        !           390:        e->e_xfp = NULL;
        !           391: }
        !           392: /*
        !           393: **  SETSENDER -- set the person who this message is from
        !           394: **
        !           395: **     Under certain circumstances allow the user to say who
        !           396: **     s/he is (using -f or -r).  These are:
        !           397: **     1.  The user's uid is zero (root).
        !           398: **     2.  The user's login name is in an approved list (typically
        !           399: **         from a network server).
        !           400: **     3.  The address the user is trying to claim has a
        !           401: **         "!" character in it (since #2 doesn't do it for
        !           402: **         us if we are dialing out for UUCP).
        !           403: **     A better check to replace #3 would be if the
        !           404: **     effective uid is "UUCP" -- this would require me
        !           405: **     to rewrite getpwent to "grab" uucp as it went by,
        !           406: **     make getname more nasty, do another passwd file
        !           407: **     scan, or compile the UID of "UUCP" into the code,
        !           408: **     all of which are reprehensible.
        !           409: **
        !           410: **     Assuming all of these fail, we figure out something
        !           411: **     ourselves.
        !           412: **
        !           413: **     Parameters:
        !           414: **             from -- the person we would like to believe this message
        !           415: **                     is from, as specified on the command line.
        !           416: **
        !           417: **     Returns:
        !           418: **             none.
        !           419: **
        !           420: **     Side Effects:
        !           421: **             sets sendmail's notion of who the from person is.
        !           422: */
        !           423: 
        !           424: setsender(from)
        !           425:        char *from;
        !           426: {
        !           427:        register char **pvp;
        !           428:        char *realname = NULL;
        !           429:        register struct passwd *pw;
        !           430:        char buf[MAXNAME];
        !           431:        char pvpbuf[PSBUFSIZE];
        !           432:        extern struct passwd *getpwnam();
        !           433:        extern char *macvalue();
        !           434:        extern char **prescan();
        !           435:        extern bool safefile();
        !           436:        extern char *FullName;
        !           437: 
        !           438:        if (tTd(45, 1))
        !           439:                printf("setsender(%s)\n", from == NULL ? "" : from);
        !           440: 
        !           441:        /*
        !           442:        **  Figure out the real user executing us.
        !           443:        **      Username can return errno != 0 on non-errors.
        !           444:        */
        !           445: 
        !           446:        if (QueueRun || OpMode == MD_SMTP || OpMode == MD_ARPAFTP)
        !           447:                realname = from;
        !           448:        if (realname == NULL || realname[0] == '\0')
        !           449:        {
        !           450:                extern char *username();
        !           451: 
        !           452:                realname = username();
        !           453:        }
        !           454: 
        !           455:        /*
        !           456:        **  Determine if this real person is allowed to alias themselves.
        !           457:        */
        !           458: 
        !           459:        if (from != NULL)
        !           460:        {
        !           461:                extern bool trusteduser();
        !           462: 
        !           463:                if (!trusteduser(realname) && getuid() != geteuid() &&
        !           464:                    index(from, '!') == NULL && getuid() != 0)
        !           465:                {
        !           466:                        /* network sends -r regardless (why why why?) */
        !           467:                        /* syserr("%s, you cannot use the -f flag", realname); */
        !           468:                        from = NULL;
        !           469:                }
        !           470:        }
        !           471: 
        !           472:        SuprErrs = TRUE;
        !           473:        if (from == NULL || parseaddr(from, &CurEnv->e_from, 1, '\0') == NULL)
        !           474:        {
        !           475:                /* log garbage addresses for traceback */
        !           476:                if (from != NULL)
        !           477:                {
        !           478: # ifdef LOG
        !           479:                        if (LogLevel >= 1)
        !           480:                            if (realname == from && RealHostName != NULL)
        !           481:                                syslog(LOG_NOTICE,
        !           482:                                    "from=%s unparseable, received from %s",
        !           483:                                    from, RealHostName);
        !           484:                            else
        !           485:                                syslog(LOG_NOTICE,
        !           486:                                    "Unparseable username %s wants from=%s",
        !           487:                                    realname, from);
        !           488: # endif LOG
        !           489:                }
        !           490:                from = newstr(realname);
        !           491:                if (parseaddr(from, &CurEnv->e_from, 1, '\0') == NULL &&
        !           492:                    parseaddr("postmaster", &CurEnv->e_from, 1, '\0') == NULL)
        !           493:                {
        !           494:                        syserr("setsender: can't even parse postmaster!");
        !           495:                }
        !           496:        }
        !           497:        else
        !           498:                FromFlag = TRUE;
        !           499:        CurEnv->e_from.q_flags |= QDONTSEND;
        !           500:        loweraddr(&CurEnv->e_from);
        !           501:        SuprErrs = FALSE;
        !           502: 
        !           503:        if (CurEnv->e_from.q_mailer == LocalMailer &&
        !           504:            (pw = getpwnam(CurEnv->e_from.q_user)) != NULL)
        !           505:        {
        !           506:                /*
        !           507:                **  Process passwd file entry.
        !           508:                */
        !           509: 
        !           510: 
        !           511:                /* extract home directory */
        !           512:                CurEnv->e_from.q_home = newstr(pw->pw_dir);
        !           513:                define('z', CurEnv->e_from.q_home, CurEnv);
        !           514: 
        !           515:                /* extract user and group id */
        !           516:                CurEnv->e_from.q_uid = pw->pw_uid;
        !           517:                CurEnv->e_from.q_gid = pw->pw_gid;
        !           518: 
        !           519:                /* if the user has given fullname already, don't redefine */
        !           520:                if (FullName == NULL)
        !           521:                        FullName = macvalue('x', CurEnv);
        !           522:                if (FullName != NULL && FullName[0] == '\0')
        !           523:                        FullName = NULL;
        !           524: 
        !           525:                /* extract full name from passwd file */
        !           526:                if (FullName == NULL && pw->pw_gecos != NULL &&
        !           527:                    strcmp(pw->pw_name, CurEnv->e_from.q_user) == 0)
        !           528:                {
        !           529:                        buildfname(pw->pw_gecos, CurEnv->e_from.q_user, buf);
        !           530:                        if (buf[0] != '\0')
        !           531:                                FullName = newstr(buf);
        !           532:                }
        !           533:                if (FullName != NULL)
        !           534:                        define('x', FullName, CurEnv);
        !           535:        }
        !           536:        else
        !           537:        {
        !           538:                if (CurEnv->e_from.q_home == NULL)
        !           539:                        CurEnv->e_from.q_home = getenv("HOME");
        !           540:                CurEnv->e_from.q_uid = getuid();
        !           541:                CurEnv->e_from.q_gid = getgid();
        !           542:        }
        !           543: 
        !           544:        /*
        !           545:        **  Rewrite the from person to dispose of possible implicit
        !           546:        **      links in the net.
        !           547:        */
        !           548: 
        !           549:        pvp = prescan(from, '\0', pvpbuf);
        !           550:        if (pvp == NULL)
        !           551:        {
        !           552: # ifdef LOG
        !           553:                if (LogLevel >= 1)
        !           554:                        syslog(LOG_NOTICE, "cannot prescan from (%s)", from);
        !           555: # endif
        !           556:                usrerr("cannot prescan from (%s)", from);
        !           557:                finis();
        !           558:        }
        !           559:        rewrite(pvp, 3);
        !           560:        rewrite(pvp, 1);
        !           561:        rewrite(pvp, 4);
        !           562:        cataddr(pvp, buf, sizeof buf);
        !           563:        define('f', newstr(buf), CurEnv);
        !           564: 
        !           565:        /* save the domain spec if this mailer wants it */
        !           566:        if (CurEnv->e_from.q_mailer != NULL &&
        !           567:            bitnset(M_CANONICAL, CurEnv->e_from.q_mailer->m_flags))
        !           568:        {
        !           569:                extern char **copyplist();
        !           570: 
        !           571:                while (*pvp != NULL && strcmp(*pvp, "@") != 0)
        !           572:                        pvp++;
        !           573:                if (*pvp != NULL)
        !           574:                        CurEnv->e_fromdomain = copyplist(pvp, TRUE);
        !           575:        }
        !           576: }
        !           577: /*
        !           578: **  TRUSTEDUSER -- tell us if this user is to be trusted.
        !           579: **
        !           580: **     Parameters:
        !           581: **             user -- the user to be checked.
        !           582: **
        !           583: **     Returns:
        !           584: **             TRUE if the user is in an approved list.
        !           585: **             FALSE otherwise.
        !           586: **
        !           587: **     Side Effects:
        !           588: **             none.
        !           589: */
        !           590: 
        !           591: bool
        !           592: trusteduser(user)
        !           593:        char *user;
        !           594: {
        !           595:        register char **ulist;
        !           596:        extern char *TrustedUsers[];
        !           597: 
        !           598:        for (ulist = TrustedUsers; *ulist != NULL; ulist++)
        !           599:                if (strcmp(*ulist, user) == 0)
        !           600:                        return (TRUE);
        !           601:        return (FALSE);
        !           602: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.