usr.sbin/i4b/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 1.8 1999/12/13 21:25:24 hm Exp $
  34  *
  35  * $FreeBSD: src/usr.sbin/i4b/isdnd/alias.c,v 1.6.2.1 2001/08/01 17:45:03 obrien Exp $
  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                 log(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                                 log(LL_ERR, "init_alias: malloc failed for struct alias!\n");
 102                                 exit(1);
 103                         }
 104
 105                         if((newa->number = (char *) malloc(strlen(number)+1)) == NULL)
 106                         {
 107                                 log(LL_ERR, "init_alias: malloc failed for number alias!\n");
 108                                 exit(1);
 109                         }
 110
 111                         if((newa->name = (char *) malloc(strlen(name)+1)) == NULL)
 112                         {
 113                                 log(LL_ERR, "init_alias: malloc failed for name alias!\n");
 114                                 exit(1);
 115                         }
 116
 117                         strcpy(newa->name, name);
 118                         strcpy(newa->number, number);
 119                         newa->next = NULL;
 120
 121                         if(firsta == NULL)
 122                         {
 123                                 firsta = newa;
 124                         }
 125                         else
 126                         {
 127                                 lasta->next = newa;
 128                         }
 129                         lasta = newa;
 130                 }
 131         }
 132         fclose(fp);
 133 }
 134
 135 /*---------------------------------------------------------------------------*
 136  *      free all aliases
 137  *---------------------------------------------------------------------------*/
 138 void
 139 free_aliases(void)
 140 {
 141         free_alias(firsta);
 142 }
 143
 144 /*---------------------------------------------------------------------------*
 145  *      free aliases
 146  *---------------------------------------------------------------------------*/
 147 static void
 148 free_alias(struct alias *ptr)
 149 {
 150
 151         if(ptr == NULL)
 152                 return;
 153
 154         if(ptr->next != NULL)
 155                 free_alias(ptr->next);
 156
 157         if(ptr->number != NULL)
 158                 free(ptr->number);
 159
 160         if(ptr->name != NULL)
 161                 free(ptr->name);
 162
 163         free(ptr);
 164 }
 165
 166 /*---------------------------------------------------------------------------*
 167  *      try to find alias for number. if no alias found, return number.
 168  *---------------------------------------------------------------------------*/
 169 char *
 170 get_alias(char *number)
 171 {
 172         struct alias *ca = NULL;
 173
 174         if(firsta == NULL)
 175                 return(number);
 176
 177         ca = firsta;
 178
 179         for(;;)
 180         {
 181                 if(strlen(number) == strlen(ca->number))
 182                 {
 183                         if(!(strcmp(number, ca->number)))
 184                                 return(ca->name);
 185                 }
 186                 if(ca->next == NULL)
 187                         break;
 188                 ca = ca->next;
 189         }
 190         return(number);
 191 }
 192
 193 /* EOF */