1 /* $NetBSD: stdhosts.c,v 1.5 1997/10/13 03:19:05 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Mats O Jansson <moj@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 1.5 1997/10/13 03:19:05 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 <string.h> 48 49 #include "protos.h" 50 51 int main __P((int, char *[])); 52 void usage __P((void)); 53 54 extern char *__progname; /* from crt0.o */ 55 56 int 57 main(argc, argv) 58 int argc; 59 char *argv[]; 60 { 61 FILE *data_file; 62 char data_line[_POSIX2_LINE_MAX]; 63 int line_no = 0, len; 64 char *k, *v, *addr_string, *fname; 65 struct in_addr host_addr; 66 67 addr_string = NULL; /* XXX gcc -Wuninitialized */ 68 69 if (argc > 2) 70 usage(); 71 72 if (argc == 2) { 73 fname = argv[1]; 74 data_file = fopen(fname, "r"); 75 if (data_file == NULL) 76 err(1, "%s", fname); 77 } else { 78 fname = "<stdin>"; 79 data_file = stdin; 80 } 81 82 while (read_line(data_file, data_line, sizeof(data_line))) { 83 line_no++; 84 len = strlen(data_line); 85 86 if (len <= 1 || data_line[0] == '#') 87 continue; 88 89 /* 90 * Check if we have the whole line 91 */ 92 if (data_line[len - 1] != '\n') { 93 warnx("%s line %d: line to long, skipping", 94 fname, line_no); 95 continue; 96 } else 97 data_line[len - 1] = '\0'; 98 99 v = data_line; 100 101 /* Find the key, replace trailing whitespace will <NUL> */ 102 for (k = v; isspace(*v) == 0; v++) 103 /*null*/; 104 while (isspace(*v)) 105 *v++ = '\0'; 106 107 if (inet_aton(k, &host_addr) == 0 || 108 (addr_string = inet_ntoa(host_addr)) == NULL) 109 warnx("%s line %d: syntax error", fname, line_no); 110 111 printf("%s %s\n", addr_string, v); 112 } 113 114 exit(0); 115 } 116 117 void 118 usage() 119 { 120 121 fprintf(stderr, "usage: %s [file]\n", __progname); 122 exit(1); 123 } 124