Home | History | Annotate | Line # | Download | only in fingerd
fingerd.c revision 1.1 
      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, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef lint
     35 char copyright[] =
     36 "@(#) Copyright (c) 1983 The Regents of the University of California.\n\
     37  All rights reserved.\n";
     38 #endif /* not lint */
     39 
     40 #ifndef lint
     41 static char sccsid[] = "@(#)fingerd.c	5.6 (Berkeley) 6/1/90";
     42 #endif /* not lint */
     43 
     44 #include <stdio.h>
     45 #include "pathnames.h"
     46 
     47 main()
     48 {
     49 	register FILE *fp;
     50 	register int ch;
     51 	register char *lp;
     52 	int p[2];
     53 #define	ENTRIES	50
     54 	char **ap, *av[ENTRIES + 1], line[1024], *strtok();
     55 
     56 #ifdef LOGGING					/* unused for now */
     57 #include <netinet/in.h>
     58 	struct sockaddr_in sin;
     59 	int sval;
     60 
     61 	sval = sizeof(sin);
     62 	if (getpeername(0, &sin, &sval) < 0)
     63 		fatal("getpeername");
     64 #endif
     65 
     66 	if (!fgets(line, sizeof(line), stdin))
     67 		exit(1);
     68 
     69 	av[0] = "finger";
     70 	for (lp = line, ap = &av[1];;) {
     71 		*ap = strtok(lp, " \t\r\n");
     72 		if (!*ap)
     73 			break;
     74 		/* RFC742: "/[Ww]" == "-l" */
     75 		if ((*ap)[0] == '/' && ((*ap)[1] == 'W' || (*ap)[1] == 'w'))
     76 			*ap = "-l";
     77 		if (++ap == av + ENTRIES)
     78 			break;
     79 		lp = NULL;
     80 	}
     81 
     82 	if (pipe(p) < 0)
     83 		fatal("pipe");
     84 
     85 	switch(fork()) {
     86 	case 0:
     87 		(void)close(p[0]);
     88 		if (p[1] != 1) {
     89 			(void)dup2(p[1], 1);
     90 			(void)close(p[1]);
     91 		}
     92 		execv(_PATH_FINGER, av);
     93 		_exit(1);
     94 	case -1:
     95 		fatal("fork");
     96 	}
     97 	(void)close(p[1]);
     98 	if (!(fp = fdopen(p[0], "r")))
     99 		fatal("fdopen");
    100 	while ((ch = getc(fp)) != EOF) {
    101 		if (ch == '\n')
    102 			putchar('\r');
    103 		putchar(ch);
    104 	}
    105 	exit(0);
    106 }
    107 
    108 fatal(msg)
    109 	char *msg;
    110 {
    111 	extern int errno;
    112 	char *strerror();
    113 
    114 	fprintf(stderr, "fingerd: %s: %s\r\n", msg, strerror(errno));
    115 	exit(1);
    116 }
    117