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  * $DragonFly: src/usr.sbin/i4b/isdnd/alias.c,v 1.2 2003/06/17 04:29:54 dillon Exp $
  37  *
  38  *      last edit-date: [Mon Dec 13 21:45:19 1999]
  39  *
  40  *----------------------------------------------------------------------------*/
  41
  42 #include "isdnd.h"
  43
  44 static struct alias *firsta = NULL;
  45
  46 #define MAXBUFSZ        256
  47
  48 static void free_alias(struct alias *ptr);
  49
  50 /*---------------------------------------------------------------------------*
  51  *      read in and init aliases
  52  *---------------------------------------------------------------------------*/
  53 void
  54 init_alias(char *filename)
  55 {
  56         FILE *fp;
  57         unsigned char buffer[MAXBUFSZ + 1];
  58         unsigned char number[MAXBUFSZ + 1];
  59         unsigned char name[MAXBUFSZ + 1];
  60         unsigned char *s, *d;
  61         struct alias *newa = NULL;
  62         struct alias *lasta = NULL;
  63
  64         firsta = NULL;
  65
  66         if((fp = fopen(filename, "r")) == NULL)
  67         {
  68                 log(LL_ERR, "init_alias: error opening aliasfile %s: %s!", filename, strerror(errno));
  69                 exit(1);
  70         }
  71
  72         while((fgets(buffer, MAXBUFSZ, fp)) != NULL)
  73         {
  74                 if(buffer[0] == '#'  || buffer[0] == ' ' ||
  75                    buffer[0] == '\t' || buffer[0] == '\n')
  76                 {
  77                         continue;
  78                 }
  79
  80                 s = buffer;
  81                 d = number;
  82
  83                 while(*s && (isdigit(*s)))
  84                         *d++ = *s++;
  85
  86                 *d = '\0';
  87
  88                 while(*s && (isspace(*s)))
  89                         s++;
  90
  91                 d = name;
  92
  93                 while(*s && (isprint(*s)))
  94                         *d++ = *s++;
  95
  96                 *d = '\0';
  97
  98                 if((strlen(number) > 1) && (strlen(name) > 1))
  99                 {
 100                         if((newa = (struct alias *) malloc(sizeof(struct alias))) == NULL)
 101                         {
 102                                 log(LL_ERR, "init_alias: malloc failed for struct alias!\n");
 103                                 exit(1);
 104                         }
 105
 106                         if((newa->number = (char *) malloc(strlen(number)+1)) == NULL)
 107                         {
 108                                 log(LL_ERR, "init_alias: malloc failed for number alias!\n");
 109                                 exit(1);
 110                         }
 111
 112                         if((newa->name = (char *) malloc(strlen(name)+1)) == NULL)
 113                         {
 114                                 log(LL_ERR, "init_alias: malloc failed for name alias!\n");
 115                                 exit(1);
 116                         }
 117
 118                         strcpy(newa->name, name);
 119                         strcpy(newa->number, number);
 120                         newa->next = NULL;
 121
 122                         if(firsta == NULL)
 123                         {
 124                                 firsta = newa;
 125                         }
 126                         else
 127                         {
 128                                 lasta->next = newa;
 129                         }
 130                         lasta = newa;
 131                 }
 132         }
 133         fclose(fp);
 134 }
 135
 136 /*---------------------------------------------------------------------------*
 137  *      free all aliases
 138  *---------------------------------------------------------------------------*/
 139 void
 140 free_aliases(void)
 141 {
 142         free_alias(firsta);
 143 }
 144
 145 /*---------------------------------------------------------------------------*
 146  *      free aliases
 147  *---------------------------------------------------------------------------*/
 148 static void
 149 free_alias(struct alias *ptr)
 150 {
 151
 152         if(ptr == NULL)
 153                 return;
 154
 155         if(ptr->next != NULL)
 156                 free_alias(ptr->next);
 157
 158         if(ptr->number != NULL)
 159                 free(ptr->number);
 160
 161         if(ptr->name != NULL)
 162                 free(ptr->name);
 163
 164         free(ptr);
 165 }
 166
 167 /*---------------------------------------------------------------------------*
 168  *      try to find alias for number. if no alias found, return number.
 169  *---------------------------------------------------------------------------*/
 170 char *
 171 get_alias(char *number)
 172 {
 173         struct alias *ca = NULL;
 174
 175         if(firsta == NULL)
 176                 return(number);
 177
 178         ca = firsta;
 179
 180         for(;;)
 181         {
 182                 if(strlen(number) == strlen(ca->number))
 183                 {
 184                         if(!(strcmp(number, ca->number)))
 185                                 return(ca->name);
 186                 }
 187                 if(ca->next == NULL)
 188                         break;
 189                 ca = ca->next;
 190         }
 191         return(number);
 192 }
 193
 194 /* EOF */