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Annotation of 43BSDTahoe/new/news/src/pathinit.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * This software is Copyright (c) 1986 by Rick Adams.
        !             3:  *
        !             4:  * Permission is hereby granted to copy, reproduce, redistribute or
        !             5:  * otherwise use this software as long as: there is no monetary
        !             6:  * profit gained specifically from the use or reproduction or this
        !             7:  * software, it is not sold, rented, traded or otherwise marketed, and
        !             8:  * this copyright notice is included prominently in any copy
        !             9:  * made.
        !            10:  *
        !            11:  * The author make no claims as to the fitness or correctness of
        !            12:  * this software for any use whatsoever, and it is provided as is. 
        !            13:  * Any use of this software is at the user's own risk.
        !            14:  *
        !            15:  * This function initializes all the strings used for the various
        !            16:  * filenames.  They cannot be compiled into the program, since that
        !            17:  * would be non-portable.  With this convention, the netnews sub-system
        !            18:  * can be owned by any non-privileged user.  It is also possible
        !            19:  * to work when the administration randomly moves users from one
        !            20:  * filesystem to another.  The convention is that a particular user
        !            21:  * (HOME, see Makefile) is searched for in /etc/passwd and all files
        !            22:  * are presumed relative to there.  This method also allows one copy
        !            23:  * of the object code to be used on ANY machine.  (this code runs
        !            24:  * un-modified on 50+ machines at IH!!)
        !            25:  *
        !            26:  * The disadvantage to using this method is that all netnews programs
        !            27:  * (inews, readnews, rnews, checknews) must first search /etc/passwd
        !            28:  * before they can start up.  This can cause significant overhead if
        !            29:  * you have a big password file.
        !            30:  *
        !            31:  * Some games are played with ifdefs to get four .o files out of this
        !            32:  * one source file.  INEW is defined for inews, READ for readnews,
        !            33:  * CHKN for checknews, and EXP for expire.
        !            34:  */
        !            35: 
        !            36: #ifdef SCCSID
        !            37: static char    *SccsId = "@(#)pathinit.c       1.24    10/7/87";
        !            38: #endif /* SCCSID */
        !            39: 
        !            40: #if defined(INEW) || defined(EXP)
        !            41: #include       "iparams.h"
        !            42: #endif /* INEW || EXP */
        !            43: 
        !            44: #ifdef READ
        !            45: #include       "rparams.h"
        !            46: #endif /* READ */
        !            47: 
        !            48: #if defined(CHKN)
        !            49: #include "params.h"
        !            50: #endif /* CHKN */
        !            51: 
        !            52: 
        !            53: char *FROMSYSNAME, *PATHSYSNAME, *LOCALSYSNAME, *LOCALPATHSYSNAME;
        !            54: char *SPOOL, *LIB, *BIN, *ACTIVE, *SUBFILE, *ARTFILE,
        !            55:        *username = "Unknown", *userhome;
        !            56: 
        !            57: #ifdef INEW
        !            58: char *LOCKFILE, *SEQFILE, *ARTICLE, *INFILE, *TELLME;
        !            59: 
        !            60: int c_cancel(), c_newgroup(), c_ihave(), c_sendme(), c_rmgroup(),
        !            61:     c_sendsys(), c_version(), c_checkgroups(), c_unimp();
        !            62: 
        !            63: struct msgtype msgtype[] = {
        !            64:        "cancel", NULL, c_cancel,
        !            65:        "newgroup", NULL, c_newgroup,
        !            66:        "ihave", NULL, c_ihave,
        !            67:        "sendme", NULL, c_sendme,
        !            68:        "sendbad", NULL, c_sendme,
        !            69:        "rmgroup", NULL, c_rmgroup,
        !            70:        "sendsys", NULL, c_sendsys,
        !            71:        "version", NULL, c_version,
        !            72:        "checkgroups", NULL, c_checkgroups,
        !            73:        "delsub", NULL, c_unimp,
        !            74:        NULL, NULL, NULL
        !            75: };
        !            76: #endif /* INEW */
        !            77: 
        !            78: #if defined(INEW) || defined(READ)
        !            79: char *ALIASES;
        !            80: #endif /* INEW || READ */
        !            81: 
        !            82: #ifdef EXP
        !            83: char *OLDNEWS;
        !            84: #endif /* EXP */
        !            85: 
        !            86: #ifdef READ
        !            87: char *MAILPARSER;
        !            88: #endif /* READ */
        !            89: 
        !            90: 
        !            91: struct passwd *getpwnam();
        !            92: char *rindex();
        !            93: 
        !            94: #define Sprintf(where,fmt,arg) (void) sprintf(bfr,fmt,arg); where = AllocCpy(bfr)
        !            95: 
        !            96: char *
        !            97: AllocCpy(cp)
        !            98: register char *cp;
        !            99: {
        !           100:        register char *mp;
        !           101:        char *malloc();
        !           102: 
        !           103:        mp = malloc((unsigned)strlen(cp) + 1);
        !           104: 
        !           105:        if (mp == NULL)
        !           106:                xerror("malloc failed on %s", cp);
        !           107: 
        !           108:        (void) strcpy(mp, cp);
        !           109:        return mp;
        !           110: }
        !           111: 
        !           112: pathinit()
        !           113: {
        !           114: #ifndef ROOTID
        !           115:        struct passwd   *pw;    /* struct for pw lookup */
        !           116: #endif /* !ROOTID */
        !           117: #ifdef EXP
        !           118:        char *p;
        !           119: #endif /* EXP */
        !           120: #ifndef CHKN
        !           121:        struct utsname ubuf;
        !           122:        char buf[BUFLEN];
        !           123:        extern char *mydomain();
        !           124: 
        !           125:        uname(&ubuf);
        !           126: 
        !           127: #ifdef HIDDENNET_IN_LOCALSYSNAME
        !           128:        /* old compatibility code, remove when HIDDENNET is used no more */
        !           129:        if (STRCMP(ubuf.nodename, HIDDENNET) != 0)
        !           130:                (void) sprintf(buf, "%s.%s%s", ubuf.nodename, HIDDENNET,
        !           131:                        mydomain());
        !           132:        else
        !           133: #endif
        !           134:                (void) sprintf(buf, "%s%s", ubuf.nodename, mydomain());
        !           135:        LOCALSYSNAME = AllocCpy(buf);
        !           136: 
        !           137: #ifdef GENERICFROM
        !           138:        (void) sprintf(buf, GENERICFROM, ubuf.nodename, mydomain());
        !           139:        FROMSYSNAME = AllocCpy(buf);
        !           140: #else /* !GENERICFROM */
        !           141:        FROMSYSNAME = LOCALSYSNAME;
        !           142: #endif /* !GENERICFROM */
        !           143: 
        !           144:        LOCALPATHSYSNAME = AllocCpy(ubuf.nodename);
        !           145: 
        !           146: #ifdef GENERICPATH
        !           147:        (void) sprintf(buf, GENERICPATH, ubuf.nodename, mydomain());
        !           148:        PATHSYSNAME = AllocCpy(buf);
        !           149: #else  /* !GENERICPATH */
        !           150:        PATHSYSNAME = LOCALPATHSYSNAME;
        !           151: #endif /* !GENERICPATH */
        !           152: 
        !           153: #endif /* !CHKN */
        !           154: 
        !           155: #ifdef HOME
        !           156:        /* Relative to the home directory of user HOME */
        !           157:        (void) sprintf(bfr, "%s/%s", logdir(HOME), SPOOLDIR);
        !           158:        SPOOL = AllocCpy(bfr);
        !           159:        (void) sprintf(bfr, "%s/%s", logdir(HOME), LIBDIR);
        !           160:        LIB = AllocCpy(bfr);
        !           161: #else /* !HOME */
        !           162:        /* Fixed paths defined in Makefile */
        !           163:        SPOOL = AllocCpy(SPOOLDIR);
        !           164:        LIB = AllocCpy(LIBDIR);
        !           165: #endif /* !HOME */
        !           166: 
        !           167: #ifdef LOGDIR
        !           168:        (void) sprintf(bfr, "%s/%s", logdir(HOME), BINDIR);
        !           169:        BIN = AllocCpy(bfr);
        !           170: #else /* !LOGDIR */
        !           171:        Sprintf(BIN, "%s", BINDIR);
        !           172: #endif /* !LOGDIR */
        !           173: 
        !           174:        Sprintf(ACTIVE, "%s/active", LIB);
        !           175: 
        !           176: #ifdef EXP
        !           177:        (void) strcpy(bfr, SPOOL);
        !           178:        p = rindex(bfr, '/');
        !           179:        if (p) {
        !           180:                strcpy(++p, "oldnews");
        !           181:                OLDNEWS = AllocCpy(bfr);
        !           182:        } else
        !           183:                OLDNEWS = AllocCpy("oldnews");
        !           184: #endif /* EXP */
        !           185: 
        !           186: #ifndef CHKN
        !           187:        Sprintf(SUBFILE, "%s/sys", LIB);
        !           188:        Sprintf(ARTFILE, "%s/history", LIB);
        !           189: # endif /* !CHKN */
        !           190: 
        !           191: # ifdef READ
        !           192: #ifdef SENDMAIL
        !           193:        Sprintf(MAILPARSER, "%s -oi -oem", SENDMAIL);
        !           194: #else /* !SENDMAIL */
        !           195:        Sprintf(MAILPARSER, "%s/recmail", LIB);
        !           196: #endif /* !SENDMAIL */
        !           197: # endif /* READ */
        !           198: 
        !           199: # if defined(READ) || defined(INEW)
        !           200:        Sprintf(ALIASES, "%s/aliases", LIB);
        !           201: # endif /* READ || INEW */
        !           202: # ifdef INEW
        !           203:        Sprintf(LOCKFILE, "%s/LOCK", LIB);
        !           204:        Sprintf(SEQFILE, "%s/seq", LIB);
        !           205:        Sprintf(ARTICLE, "%s/.arXXXXXX", SPOOL);
        !           206:        Sprintf(INFILE, "%s/.inXXXXXX", SPOOL);
        !           207: /*
        !           208:  * The person notified by the netnews sub-system.  Again, no name is
        !           209:  * compiled in, but instead the information is taken from a file.
        !           210:  * If the file does not exist, a "default" person will get the mail.
        !           211:  * If the file exists, but is empty, nobody will get the mail.  This
        !           212:  * may seem backwards, but is a better fail-safe.
        !           213:  */
        !           214: # ifdef NOTIFY
        !           215:        parse_notify();
        !           216: # endif /* NOTIFY */
        !           217: 
        !           218: /*
        !           219:  * Since the netnews owner's id number is different on different
        !           220:  * systems, we'll extract it from the /etc/passwd file.  If no entry,
        !           221:  * default to root.  This id number seems to only be used to control who
        !           222:  * can input certain control messages or cancel any message.  Note that
        !           223:  * entry is the name from the "notify" file as found above if possible.
        !           224:  * Defining ROOTID in defs.h hardwires in a number and avoids
        !           225:  * another search of /etc/passwd.
        !           226:  */
        !           227: # ifndef ROOTID
        !           228:        if ((pw = getpwnam(TELLME)) != NULL)
        !           229:                ROOTID =  pw->pw_uid;
        !           230:        else if ((pw = getpwnam(HOME)) != NULL)
        !           231:                ROOTID =  pw->pw_uid;
        !           232:        else
        !           233:                ROOTID = 0;             /* nobody left, let only root */
        !           234: # endif /* !ROOTID */
        !           235: #endif /* INEW */
        !           236: }
        !           237: 
        !           238: #ifdef INEW
        !           239: #ifdef NOTIFY
        !           240: /*
        !           241:  * Attempt to parse the LIB/notify file into the global structure msgtype[].
        !           242:  */
        !           243: parse_notify()
        !           244: {
        !           245:        FILE *nfd;
        !           246:        int valid = 0, done = 0;
        !           247:        register struct msgtype *mp;
        !           248:        char mtype[BUFLEN], addr[BUFLEN];
        !           249: 
        !           250:        (void) sprintf(bfr, "%s/notify", LIB);
        !           251: #ifndef ROOTID
        !           252:        TELLME = AllocCpy(NOTIFY);      
        !           253: #endif /* !ROOTID */
        !           254:        if ( (nfd = fopen(bfr, "r")) == NULL) {
        !           255:                /* 
        !           256:                 * Set defaults to NOTIFY
        !           257:                 */
        !           258: #ifdef debug
        !           259:                log("parse_notify: %s/notify not found", LIB);
        !           260: #endif /* debug */
        !           261:                (void)setmsg("all", NOTIFY);
        !           262:                return;
        !           263:        }
        !           264:        do  {
        !           265:                mtype[0] = addr[0] = 0;
        !           266:                switch( get_notify(nfd, mtype, addr) ) {
        !           267:                case 0:
        !           268:                        continue;
        !           269:                case 1:
        !           270:                        valid += setmsg(mtype, "");
        !           271:                        break;
        !           272:                case 2:
        !           273:                        valid += setmsg(mtype, addr);
        !           274:                        break;
        !           275:                case -1:
        !           276:                        if( !valid ) {
        !           277: #ifdef debug
        !           278:                                log("parse_notify: no valid entries found.");
        !           279: #endif /* debug */
        !           280:                                setmsg("all", ""); /* send mail to no one */
        !           281:                        }
        !           282:                        done = 1;
        !           283:                }
        !           284:        } while( !done );
        !           285: 
        !           286:        /*
        !           287:         * point to zero length string for all entries we haven't touched
        !           288:         */
        !           289:        for(mp=msgtype; mp->m_name; mp++)
        !           290:                if(mp->m_who_to == 0)
        !           291:                        mp->m_who_to = "";
        !           292: }
        !           293: 
        !           294: setmsg(what, to)
        !           295: char *what, *to;
        !           296: {
        !           297:        register struct msgtype *mp;
        !           298: #ifdef debug
        !           299:        log("setmsg: what='%s', to='%s'", what, to);
        !           300: #endif /* debug */
        !           301:        /*
        !           302:         * Special case for "all"
        !           303:         */
        !           304:        if(STRCMP(what, "all") == 0) {
        !           305:                for(mp=msgtype; mp->m_name; mp++) {
        !           306:                        mp->m_who_to = AllocCpy(to);
        !           307: #ifdef debug
        !           308:                        log("setmsg: '%s'='%s'", mp->m_name, mp->m_who_to);
        !           309: #endif /* debug */
        !           310:                }
        !           311:                return 1;
        !           312:        }
        !           313: 
        !           314:        for(mp=msgtype; mp->m_name; mp++)
        !           315:                if(STRCMP(mp->m_name, what) == 0) {
        !           316:                        mp->m_who_to = AllocCpy(to);
        !           317: #ifdef debug
        !           318:                        log("setmsg: '%s'='%s'", mp->m_name, mp->m_who_to);
        !           319: #endif /* debug */
        !           320:                        return 1;
        !           321:                }
        !           322:        return 0;
        !           323: }
        !           324: 
        !           325: static
        !           326: get_notify(fp, s, t)
        !           327: FILE *fp;
        !           328: register char *s, *t;
        !           329: {
        !           330:        register char *cp;
        !           331:        char buf[BUFSIZ];
        !           332: 
        !           333:        if( cp=fgets(buf, sizeof(buf), fp ) ) {
        !           334:                if( *cp == '\n' ) 
        !           335:                        return 0;
        !           336:                while(*cp && *cp != ' ' && *cp != '\t' && *cp != '\n')
        !           337:                        *s++ = *cp++;
        !           338:                *s = '\0';      /* terminate first string */
        !           339: 
        !           340:                while(*cp && (*cp == ' ' || *cp == '\t' || *cp == '\n') )
        !           341:                        cp++;   /* look for start of second */
        !           342:                if( !*cp || *cp == '\n' )
        !           343:                        return 1;       /* no second string */
        !           344:                
        !           345:                while( *cp && *cp != '\n' )
        !           346:                        *t++ = *cp++;
        !           347:                *t = '\0';
        !           348:                return 2;
        !           349:        } else
        !           350:                return -1;
        !           351: }
        !           352: #endif /* NOTIFY */
        !           353: #endif /* INEW */
        !           354: 
        !           355: #ifndef CHKN
        !           356: /*
        !           357:  * At sites where the are many mail domains within the support area of a single
        !           358:  * news administrator, it is much nicer to be able to read the local domain of
        !           359:  * a machine from a file.  What we do here is:
        !           360:  * 1)  Check for the presence of a LIBDIR/localdomain file.  If it doesn't 
        !           361:  *     exist,assume that MYDOMAIN should be used instead.
        !           362:  * 2)  If it does exist, we make the following assumptions:
        !           363:  *     a)  If it is empty, has only comments, or only blank lines; we assume
        !           364:  *         the domain is desired to be a zero length string ( ie "").  (this
        !           365:  *         implies that the domain name is contained in the hostname.)
        !           366:  *     b)  If it is not empty, we assume the first line not beginning with a
        !           367:  *         '#', blank/tab, or newline is the desired domain name.
        !           368:  *         A like '.UUCP' or '.TEK.COM' should be used.  We could insure that
        !           369:  *         the line begin with a '.' to be a valid domain name, but I don't 
        !           370:  *         think it is necessary to put that restriction on it.
        !           371:  */
        !           372: char *
        !           373: mydomain()
        !           374: {
        !           375:        static char *md = NULL;
        !           376:        register char *cp;
        !           377:        FILE *fp = NULL;
        !           378:        char fbuf[BUFLEN];
        !           379:        extern char *malloc(), *strcpy(), *index();
        !           380: 
        !           381:        if(md)  /* we've been here before, so just return what we found */
        !           382:                return(md);
        !           383: 
        !           384:        (void) sprintf(fbuf,"%s/localdomain", LIBDIR);
        !           385:        if ( (fp = fopen(fbuf,"r")) == NULL) {
        !           386:                md = MYDOMAIN;  /* No localdomain file, use MYDOMAIN instead */
        !           387:        } else {
        !           388:                while(fgets(fbuf, sizeof(fbuf), fp) ) {
        !           389:                        if( *fbuf == '\n' || *fbuf == '#' 
        !           390:                            || *fbuf == ' ' || *fbuf == '\t')
        !           391:                                continue;
        !           392:        
        !           393:                        if( cp = index(fbuf, '\n') )
        !           394:                                *cp = '\0';
        !           395:        
        !           396:                        if ( (md = malloc(strlen(fbuf) + 1)) == NULL)
        !           397:                                md = MYDOMAIN;  /* punt here */
        !           398:                        else
        !           399:                                (void)strcpy(md, fbuf);
        !           400:                        break;
        !           401:                }
        !           402:        }
        !           403: 
        !           404:        if(fp)
        !           405:                (void)fclose(fp);
        !           406: 
        !           407:        if( md == NULL)
        !           408:                md = "";
        !           409:        
        !           410:        return md;
        !           411: }
        !           412: #endif /* !CHKN */

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