usr.sbin/isdn/isdnd/alias.c

   1 /*
   2  * Copyright (c) 1997, 1999 Hellmuth Michaelis. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  23  * SUCH DAMAGE.
  24  *
  25  *---------------------------------------------------------------------------
  26  *
  27  *      isdnd - common aliasfile handling
  28  *      =================================
  29  *
  30  *      NOTE:   this has to stay in sync with isdntel/alias.c to be able
  31  *              to share a common aliasfile!
  32  *
  33  *      $Id: alias.c,v 1.5 2006/05/24 23:44:34 christos Exp $
  34  *
  35  * $FreeBSD$
  36  *
  37  *      last edit-date: [Mon Dec 13 21:45:19 1999]
  38  *
  39  *----------------------------------------------------------------------------*/
  40
  41 #include "isdnd.h"
  42
  43 static struct alias *firsta = NULL;
  44
  45 #define MAXBUFSZ        256
  46
  47 static void free_alias(struct alias *ptr);
  48
  49 /*---------------------------------------------------------------------------*
  50  *      read in and init aliases
  51  *---------------------------------------------------------------------------*/
  52 void
  53 init_alias(char *filename)
  54 {
  55         FILE *fp;
  56         unsigned char buffer[MAXBUFSZ + 1];
  57         unsigned char number[MAXBUFSZ + 1];
  58         unsigned char name[MAXBUFSZ + 1];
  59         unsigned char *s, *d;
  60         struct alias *newa = NULL;
  61         struct alias *lasta = NULL;
  62
  63         firsta = NULL;
  64
  65         if ((fp = fopen(filename, "r")) == NULL)
  66         {
  67                 logit(LL_ERR, "init_alias: error opening aliasfile %s: %s!", filename, strerror(errno));
  68                 exit(1);
  69         }
  70
  71         while((fgets(buffer, MAXBUFSZ, fp)) != NULL)
  72         {
  73                 if (buffer[0] == '#'  || buffer[0] == ' ' ||
  74                    buffer[0] == '\t' || buffer[0] == '\n')
  75                 {
  76                         continue;
  77                 }
  78
  79                 s = buffer;
  80                 d = number;
  81
  82                 while(*s && (isdigit(*s)))
  83                         *d++ = *s++;
  84
  85                 *d = '\0';
  86
  87                 while(*s && (isspace(*s)))
  88                         s++;
  89
  90                 d = name;
  91
  92                 while(*s && (isprint(*s)))
  93                         *d++ = *s++;
  94
  95                 *d = '\0';
  96
  97                 if ((strlen(number) > 1) && (strlen(name) > 1))
  98                 {
  99                         if ((newa = (struct alias *) malloc(sizeof(struct alias))) == NULL)
 100                         {
 101                                 logit(LL_ERR, "init_alias: malloc failed for struct alias!\n");
 102                                 exit(1);
 103                         }
 104
 105                         if ((newa->number = strdup(number)) == NULL)
 106                         {
 107                                 logit(LL_ERR, "init_alias: malloc failed for number alias!\n");
 108                                 exit(1);
 109                         }
 110
 111                         if ((newa->name = strdup(name)) == NULL)
 112                         {
 113                                 logit(LL_ERR, "init_alias: malloc failed for name alias!\n");
 114                                 exit(1);
 115                         }
 116
 117                         newa->next = NULL;
 118
 119                         if (firsta == NULL || lasta == NULL)
 120                         {
 121                                 firsta = newa;
 122                         }
 123                         else
 124                         {
 125                                 lasta->next = newa;
 126                         }
 127                         lasta = newa;
 128                 }
 129         }
 130         fclose(fp);
 131 }
 132
 133 /*---------------------------------------------------------------------------*
 134  *      free all aliases
 135  *---------------------------------------------------------------------------*/
 136 void
 137 free_aliases(void)
 138 {
 139         free_alias(firsta);
 140 }
 141
 142 /*---------------------------------------------------------------------------*
 143  *      free aliases
 144  *---------------------------------------------------------------------------*/
 145 static void
 146 free_alias(struct alias *ptr)
 147 {
 148
 149         if (ptr == NULL)
 150                 return;
 151
 152         if (ptr->next != NULL)
 153                 free_alias(ptr->next);
 154
 155         if (ptr->number != NULL)
 156                 free(ptr->number);
 157
 158         if (ptr->name != NULL)
 159                 free(ptr->name);
 160
 161         free(ptr);
 162 }
 163
 164 /*---------------------------------------------------------------------------*
 165  *      try to find alias for number. if no alias found, return number.
 166  *---------------------------------------------------------------------------*/
 167 char *
 168 get_alias(char *number)
 169 {
 170         struct alias *ca = NULL;
 171
 172         if (firsta == NULL)
 173                 return(number);
 174
 175         ca = firsta;
 176
 177         for (;;)
 178         {
 179                 if (strlen(number) == strlen(ca->number))
 180                 {
 181                         if (!(strcmp(number, ca->number)))
 182                                 return(ca->name);
 183                 }
 184                 if (ca->next == NULL)
 185                         break;
 186                 ca = ca->next;
 187         }
 188         return(number);
 189 }
 190
 191 /* EOF */