stdhosts.tproj/stdhosts.c

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