stdhosts.tproj/stdhosts.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*      $OpenBSD: stdhosts.c,v 1.4 1997/09/11 19:47:35 deraadt Exp $ */
  26
  27 /*
  28  * Copyright (c) 1994 Mats O Jansson <moj@stacken.kth.se>
  29  * All rights reserved.
  30  *
  31  * Redistribution and use in source and binary forms, with or without
  32  * modification, are permitted provided that the following conditions
  33  * are met:
  34  * 1. Redistributions of source code must retain the above copyright
  35  *    notice, this list of conditions and the following disclaimer.
  36  * 2. Redistributions in binary form must reproduce the above copyright
  37  *    notice, this list of conditions and the following disclaimer in the
  38  *    documentation and/or other materials provided with the distribution.
  39  * 3. All advertising materials mentioning features or use of this software
  40  *    must display the following acknowledgement:
  41  *      This product includes software developed by Mats O Jansson
  42  * 4. The name of the author may not be used to endorse or promote products
  43  *    derived from this software without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
  46  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  47  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  49  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  */
  57
  58 #ifndef LINT
  59 static char rcsid[] = "$OpenBSD: stdhosts.c,v 1.4 1997/09/11 19:47:35 deraadt Exp $";
  60 #endif
  61
  62 #include <sys/types.h>
  63 #include <sys/socket.h>
  64 #include <netinet/in.h>
  65 #include <arpa/inet.h>
  66 #include <stdio.h>
  67 #include <string.h>
  68 #include <ctype.h>
  69
  70 static int read_line(fp, buf, size)
  71 FILE *fp;
  72 char *buf;
  73 int size;
  74 {
  75         int done = 0;
  76
  77         do {
  78                 while (fgets(buf, size, fp)) {
  79                         int len = strlen(buf);
  80                         done += len;
  81                         if (len > 1 && buf[len-2] == '\\' &&
  82                                         buf[len-1] == '\n') {
  83                                 int ch;
  84                                 buf += len - 2;
  85                                 size -= len - 2;
  86                                 *buf = '\n'; buf[1] = '\0';
  87                                 /*
  88                                  * Skip leading white space on next line
  89                                  */
  90                                 while ((ch = getc(fp)) != EOF &&
  91                                         isascii(ch) && isspace(ch))
  92                                                 ;
  93                                 (void) ungetc(ch, fp);
  94                         } else {
  95                                 return done;
  96                         }
  97                 }
  98         } while (size > 0 && !feof(fp));
  99
 100         return done;
 101 }
 102
 103 int
 104 main (argc,argv)
 105 int argc;
 106 char *argv[];
 107 {
 108   FILE  *data_file;
 109   char   data_line[1024];
 110   int    usage = 0;
 111   int    line_no = 0;
 112   int    len;
 113   char  *p,*k,*v;
 114   struct in_addr host_addr;
 115
 116   if (argc > 2) {
 117     usage++;
 118   }
 119
 120   if (usage) {
 121     fprintf(stderr,
 122             "%s",
 123             "usage: stdhosts [file]\n");
 124     exit(1);
 125   }
 126
 127   if (argc == 2) {
 128     data_file = fopen(argv[argc-1], "r");
 129   } else {
 130     data_file = stdin;
 131   }
 132
 133   while (read_line(data_file,data_line,sizeof(data_line))) {
 134
 135     line_no++;
 136     len = strlen(data_line);
 137
 138     if (len > 0) {
 139       if (data_line[0] == '#')
 140         continue;
 141     }
 142
 143     /*
 144      * Check if we have the whole line
 145      */
 146
 147     if (data_line[len-1] != '\n') {
 148       if (argc == 2) {
 149         fprintf(stderr, "line %d in \"%s\" is too long", line_no, argv[1]);
 150       } else {
 151         fprintf(stderr, "line %d in \"stdin\" is too long", line_no);
 152       }
 153     } else {
 154       data_line[len-1] = '\0';
 155     }
 156
 157     p = (char *) &data_line;
 158
 159     k  = p;                                     /* save start of key */
 160     while (!isspace(*p)) { p++; };              /* find first "space" */
 161     while (isspace(*p)) { *p = '\0'; p++; };    /* replace space with <NUL> */
 162
 163     v = p;                                      /* save start of value */
 164     while(*p != '\0') { p++; };                 /* find end of string */
 165
 166     (void)inet_aton(k,&host_addr);
 167     printf("%s %s\n",inet_ntoa(host_addr),v);
 168
 169   }
 170
 171   return(0);
 172
 173 }