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Annotation of 43BSDReno/libexec/fingerd/fingerd.c, revision 1.1.1.1

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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