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stdhosts.c revision 1.11 
      1 /*	$NetBSD: stdhosts.c,v 1.11 1999/07/25 09:01:05 lukem Exp $	 */
      2 
      3 /*
      4  * Copyright (c) 1994 Mats O Jansson <moj (at) stacken.kth.se>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by Mats O Jansson
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     22  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     23  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
     25  * 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 #include <sys/cdefs.h>
     35 #ifndef lint
     36 __RCSID("$NetBSD: stdhosts.c,v 1.11 1999/07/25 09:01:05 lukem Exp $");
     37 #endif
     38 
     39 #include <sys/types.h>
     40 #include <sys/socket.h>
     41 #include <netinet/in.h>
     42 #include <arpa/inet.h>
     43 #include <ctype.h>
     44 #include <err.h>
     45 #include <limits.h>
     46 #include <stdio.h>
     47 #include <stdlib.h>
     48 #include <string.h>
     49 #include <util.h>
     50 
     51 #include "protos.h"
     52 
     53 int	main __P((int, char *[]));
     54 void	usage __P((void));
     55 
     56 extern	char *__progname;	/* from crt0.o */
     57 
     58 int
     59 main(argc, argv)
     60 	int argc;
     61 	char *argv[];
     62 {
     63 	struct in_addr host_addr;
     64 	FILE	*data_file;
     65 	size_t	 line_no;
     66 	size_t	 len;
     67 	char	*line, *k, *v, *addr_string, *fname;
     68 
     69 	addr_string = NULL;		/* XXX gcc -Wuninitialized */
     70 
     71 	if (argc > 2)
     72 		usage();
     73 
     74 	if (argc == 2) {
     75 		fname = argv[1];
     76 		data_file = fopen(fname, "r");
     77 		if (data_file == NULL)
     78 			err(1, "%s", fname);
     79 	} else {
     80 		fname = "<stdin>";
     81 		data_file = stdin;
     82 	}
     83 
     84 	line_no = 0;
     85 	for (;
     86 	    (line = fparseln(data_file, &len, &line_no, NULL,
     87 		FPARSELN_UNESCALL));
     88 	    free(line)) {
     89 		if (len == 0)
     90 			continue;
     91 
     92 		v = line;
     93 		for (k = v; *v && !isspace(*v); v++)
     94 			;
     95 		while (*v && isspace(*v))
     96 			*v++ = '\0';
     97 
     98 		if (inet_aton(k, &host_addr) == 0 ||
     99 		    (addr_string = inet_ntoa(host_addr)) == NULL) {
    100 			warnx("%s line %lu: syntax error", fname,
    101 			    (unsigned long)line_no);
    102 		} else
    103 			printf("%s %s\n", addr_string, v);
    104 	}
    105 
    106 	exit(0);
    107 }
    108 
    109 void
    110 usage()
    111 {
    112 
    113 	fprintf(stderr, "usage: %s [file]\n", __progname);
    114 	exit(1);
    115 }
    116