Return to finger.c CVS log

Up to [CSRG BSD Unix] / 43BSDReno / usr.bin / finger

Annotation of 43BSDReno/usr.bin/finger/finger.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1989 The Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * This code is derived from software contributed to Berkeley by
        !             6:  * Tony Nardo of the Johns Hopkins University/Applied Physics Lab.
        !             7:  *
        !             8:  * Redistribution and use in source and binary forms are permitted provided
        !             9:  * that: (1) source distributions retain this entire copyright notice and
        !            10:  * comment, and (2) distributions including binaries display the following
        !            11:  * acknowledgement:  ``This product includes software developed by the
        !            12:  * University of California, Berkeley and its contributors'' in the
        !            13:  * documentation or other materials provided with the distribution and in
        !            14:  * all advertising materials mentioning features or use of this software.
        !            15:  * Neither the name of the University nor the names of its contributors may
        !            16:  * be used to endorse or promote products derived from this software without
        !            17:  * specific prior written permission.
        !            18:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            19:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            20:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            21:  */
        !            22: 
        !            23: #ifndef lint
        !            24: char copyright[] =
        !            25: "@(#) Copyright (c) 1989 The Regents of the University of California.\n\
        !            26:  All rights reserved.\n";
        !            27: #endif /* not lint */
        !            28: 
        !            29: #ifndef lint
        !            30: static char sccsid[] = "@(#)finger.c   5.21 (Berkeley) 6/24/90";
        !            31: #endif /* not lint */
        !            32: 
        !            33: /*
        !            34:  * Finger prints out information about users.  It is not portable since
        !            35:  * certain fields (e.g. the full user name, office, and phone numbers) are
        !            36:  * extracted from the gecos field of the passwd file which other UNIXes
        !            37:  * may not have or may use for other things.
        !            38:  *
        !            39:  * There are currently two output formats; the short format is one line
        !            40:  * per user and displays login name, tty, login time, real name, idle time,
        !            41:  * and office location/phone number.  The long format gives the same
        !            42:  * information (in a more legible format) as well as home directory, shell,
        !            43:  * mail info, and .plan/.project files.
        !            44:  */
        !            45: 
        !            46: #include <sys/param.h>
        !            47: #include <sys/file.h>
        !            48: #include <stdio.h>
        !            49: #include "finger.h"
        !            50: 
        !            51: time_t now;
        !            52: int lflag, sflag, mflag, pplan;
        !            53: char tbuf[1024];
        !            54: 
        !            55: main(argc, argv)
        !            56:        int argc;
        !            57:        char **argv;
        !            58: {
        !            59:        extern int optind;
        !            60:        int ch;
        !            61:        time_t time();
        !            62: 
        !            63:        while ((ch = getopt(argc, argv, "lmps")) != EOF)
        !            64:                switch(ch) {
        !            65:                case 'l':
        !            66:                        lflag = 1;              /* long format */
        !            67:                        break;
        !            68:                case 'm':
        !            69:                        mflag = 1;              /* force exact match of names */
        !            70:                        break;
        !            71:                case 'p':
        !            72:                        pplan = 1;              /* don't show .plan/.project */
        !            73:                        break;
        !            74:                case 's':
        !            75:                        sflag = 1;              /* short format */
        !            76:                        break;
        !            77:                case '?':
        !            78:                default:
        !            79:                        (void)fprintf(stderr,
        !            80:                            "usage: finger [-lmps] [login ...]\n");
        !            81:                        exit(1);
        !            82:                }
        !            83:        argc -= optind;
        !            84:        argv += optind;
        !            85: 
        !            86:        (void)time(&now);
        !            87:        setpassent(1);
        !            88:        if (!*argv) {
        !            89:                /*
        !            90:                 * Assign explicit "small" format if no names given and -l
        !            91:                 * not selected.  Force the -s BEFORE we get names so proper
        !            92:                 * screening will be done.
        !            93:                 */
        !            94:                if (!lflag)
        !            95:                        sflag = 1;      /* if -l not explicit, force -s */
        !            96:                loginlist();
        !            97:                if (entries == 0)
        !            98:                        (void)printf("No one logged on.\n");
        !            99:        } else {
        !           100:                userlist(argc, argv);
        !           101:                /*
        !           102:                 * Assign explicit "large" format if names given and -s not
        !           103:                 * explicitly stated.  Force the -l AFTER we get names so any
        !           104:                 * remote finger attempts specified won't be mishandled.
        !           105:                 */
        !           106:                if (!sflag)
        !           107:                        lflag = 1;      /* if -s not explicit, force -l */
        !           108:        }
        !           109:        if (entries != 0) {
        !           110:                if (lflag)
        !           111:                        lflag_print();
        !           112:                else
        !           113:                        sflag_print();
        !           114:        }
        !           115:        exit(0);
        !           116: }
        !           117: 
        !           118: loginlist()
        !           119: {
        !           120:        register PERSON *pn;
        !           121:        struct passwd *pw;
        !           122:        struct utmp user;
        !           123:        char name[UT_NAMESIZE + 1];
        !           124: 
        !           125:        if (!freopen(_PATH_UTMP, "r", stdin)) {
        !           126:                (void)fprintf(stderr, "finger: can't read %s.\n", _PATH_UTMP);
        !           127:                exit(2);
        !           128:        }
        !           129:        name[UT_NAMESIZE] = NULL;
        !           130:        while (fread((char *)&user, sizeof(user), 1, stdin) == 1) {
        !           131:                if (!user.ut_name[0])
        !           132:                        continue;
        !           133:                if ((pn = find_person(user.ut_name)) == NULL) {
        !           134:                        bcopy(user.ut_name, name, UT_NAMESIZE);
        !           135:                        if ((pw = getpwnam(name)) == NULL)
        !           136:                                continue;
        !           137:                        pn = enter_person(pw);
        !           138:                }
        !           139:                enter_where(&user, pn);
        !           140:        }
        !           141:        for (pn = phead; lflag && pn != NULL; pn = pn->next)
        !           142:                enter_lastlog(pn);
        !           143: }
        !           144: 
        !           145: userlist(argc, argv)
        !           146:        register argc;
        !           147:        register char **argv;
        !           148: {
        !           149:        register i;
        !           150:        register PERSON *pn;
        !           151:        PERSON *nethead;
        !           152:        struct utmp user;
        !           153:        struct passwd *pw;
        !           154:        int dolocal, *used;
        !           155:        char *index();
        !           156: 
        !           157:        if (!(used = (int *)calloc((u_int)argc, (u_int)sizeof(int)))) {
        !           158:                (void)fprintf(stderr, "finger: out of space.\n");
        !           159:                exit(1);
        !           160:        }
        !           161: 
        !           162:        /* pull out all network requests */
        !           163:        for (i = 0, dolocal = 0, nethead = NULL; i < argc; i++) {
        !           164:                if (!index(argv[i], '@')) {
        !           165:                        dolocal = 1;
        !           166:                        continue;
        !           167:                }
        !           168:                pn = palloc();
        !           169:                pn->next = nethead;
        !           170:                nethead = pn;
        !           171:                pn->name = argv[i];
        !           172:                used[i] = -1;
        !           173:        }
        !           174: 
        !           175:        if (!dolocal)
        !           176:                goto net;
        !           177: 
        !           178:        /*
        !           179:         * traverse the list of possible login names and check the login name
        !           180:         * and real name against the name specified by the user.
        !           181:         */
        !           182:        if (mflag) {
        !           183:                for (i = 0; i < argc; i++)
        !           184:                        if (used[i] >= 0 && (pw = getpwnam(argv[i]))) {
        !           185:                                enter_person(pw);
        !           186:                                used[i] = 1;
        !           187:                        }
        !           188:        } else while (pw = getpwent())
        !           189:                for (i = 0; i < argc; i++)
        !           190:                        if (used[i] >= 0 &&
        !           191:                            (!strcasecmp(pw->pw_name, argv[i]) ||
        !           192:                            match(pw, argv[i]))) {
        !           193:                                enter_person(pw);
        !           194:                                used[i] = 1;
        !           195:                        }
        !           196: 
        !           197:        /* list errors */
        !           198:        for (i = 0; i < argc; i++)
        !           199:                if (!used[i])
        !           200:                        (void)fprintf(stderr,
        !           201:                            "finger: %s: no such user.\n", argv[i]);
        !           202: 
        !           203:        /* handle network requests */
        !           204: net:   for (pn = nethead; pn; pn = pn->next) {
        !           205:                netfinger(pn->name);
        !           206:                if (pn->next || entries)
        !           207:                        putchar('\n');
        !           208:        }
        !           209: 
        !           210:        if (entries == 0)
        !           211:                return;
        !           212: 
        !           213:        /*
        !           214:         * Scan thru the list of users currently logged in, saving
        !           215:         * appropriate data whenever a match occurs.
        !           216:         */
        !           217:        if (!freopen(_PATH_UTMP, "r", stdin)) {
        !           218:                (void)fprintf( stderr, "finger: can't read %s.\n", _PATH_UTMP);
        !           219:                exit(1);
        !           220:        }
        !           221:        while (fread((char *)&user, sizeof(user), 1, stdin) == 1) {
        !           222:                if (!user.ut_name[0])
        !           223:                        continue;
        !           224:                if ((pn = find_person(user.ut_name)) == NULL)
        !           225:                        continue;
        !           226:                enter_where(&user, pn);
        !           227:        }
        !           228:        for (pn = phead; pn != NULL; pn = pn->next)
        !           229:                enter_lastlog(pn);
        !           230: }

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