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Annotation of 43BSDReno/libexec/fingerd/fingerd.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1983 The Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that: (1) source distributions retain this entire copyright
        !             7:  * notice and comment, and (2) distributions including binaries display
        !             8:  * the following acknowledgement:  ``This product includes software
        !             9:  * developed by the University of California, Berkeley and its contributors''
        !            10:  * in the documentation or other materials provided with the distribution
        !            11:  * and in all advertising materials mentioning features or use of this
        !            12:  * software. Neither the name of the University nor the names of its
        !            13:  * contributors may be used to endorse or promote products derived
        !            14:  * from this software without specific prior written permission.
        !            15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            18:  */
        !            19: 
        !            20: #ifndef lint
        !            21: char copyright[] =
        !            22: "@(#) Copyright (c) 1983 The Regents of the University of California.\n\
        !            23:  All rights reserved.\n";
        !            24: #endif /* not lint */
        !            25: 
        !            26: #ifndef lint
        !            27: static char sccsid[] = "@(#)fingerd.c  5.6 (Berkeley) 6/1/90";
        !            28: #endif /* not lint */
        !            29: 
        !            30: #include <stdio.h>
        !            31: #include "pathnames.h"
        !            32: 
        !            33: main()
        !            34: {
        !            35:        register FILE *fp;
        !            36:        register int ch;
        !            37:        register char *lp;
        !            38:        int p[2];
        !            39: #define        ENTRIES 50
        !            40:        char **ap, *av[ENTRIES + 1], line[1024], *strtok();
        !            41: 
        !            42: #ifdef LOGGING                                 /* unused for now */
        !            43: #include <netinet/in.h>
        !            44:        struct sockaddr_in sin;
        !            45:        int sval;
        !            46: 
        !            47:        sval = sizeof(sin);
        !            48:        if (getpeername(0, &sin, &sval) < 0)
        !            49:                fatal("getpeername");
        !            50: #endif
        !            51: 
        !            52:        if (!fgets(line, sizeof(line), stdin))
        !            53:                exit(1);
        !            54: 
        !            55:        av[0] = "finger";
        !            56:        for (lp = line, ap = &av[1];;) {
        !            57:                *ap = strtok(lp, " \t\r\n");
        !            58:                if (!*ap)
        !            59:                        break;
        !            60:                /* RFC742: "/[Ww]" == "-l" */
        !            61:                if ((*ap)[0] == '/' && ((*ap)[1] == 'W' || (*ap)[1] == 'w'))
        !            62:                        *ap = "-l";
        !            63:                if (++ap == av + ENTRIES)
        !            64:                        break;
        !            65:                lp = NULL;
        !            66:        }
        !            67: 
        !            68:        if (pipe(p) < 0)
        !            69:                fatal("pipe");
        !            70: 
        !            71:        switch(fork()) {
        !            72:        case 0:
        !            73:                (void)close(p[0]);
        !            74:                if (p[1] != 1) {
        !            75:                        (void)dup2(p[1], 1);
        !            76:                        (void)close(p[1]);
        !            77:                }
        !            78:                execv(_PATH_FINGER, av);
        !            79:                _exit(1);
        !            80:        case -1:
        !            81:                fatal("fork");
        !            82:        }
        !            83:        (void)close(p[1]);
        !            84:        if (!(fp = fdopen(p[0], "r")))
        !            85:                fatal("fdopen");
        !            86:        while ((ch = getc(fp)) != EOF) {
        !            87:                if (ch == '\n')
        !            88:                        putchar('\r');
        !            89:                putchar(ch);
        !            90:        }
        !            91:        exit(0);
        !            92: }
        !            93: 
        !            94: fatal(msg)
        !            95:        char *msg;
        !            96: {
        !            97:        extern int errno;
        !            98:        char *strerror();
        !            99: 
        !           100:        fprintf(stderr, "fingerd: %s: %s\r\n", msg, strerror(errno));
        !           101:        exit(1);
        !           102: }

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