usr.sbin/isdn/isdntel/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  *      isdntel - isdn4bsd telephone answering machine support
  28  *      ======================================================
  29  *
  30  *      $Id: alias.c,v 1.4 2009/04/16 05:56:33 lukem Exp $
  31  *
  32  * $FreeBSD$
  33  *
  34  *      last edit-date: [Mon Dec 13 21:53:37 1999]
  35  *
  36  *----------------------------------------------------------------------------*/
  37
  38 #include "defs.h"
  39 #include "alias.h"
  40
  41 static struct alias *firsta = NULL;
  42
  43 #define MAXBUFSZ        256
  44
  45 /*---------------------------------------------------------------------------*
  46  *      read in and init aliases
  47  *---------------------------------------------------------------------------*/
  48 void
  49 init_alias(const char *filename)
  50 {
  51         FILE *fp;
  52         unsigned char buffer[MAXBUFSZ + 1];
  53         unsigned char number[MAXBUFSZ + 1];
  54         unsigned char name[MAXBUFSZ + 1];
  55         unsigned char *s, *d;
  56         struct alias *newa = NULL;
  57         struct alias *lasta = NULL;
  58
  59         if ((fp = fopen(filename, "r")) == NULL)
  60                 return;
  61
  62         while((fgets(buffer, MAXBUFSZ, fp)) != NULL)
  63         {
  64                 if (buffer[0] == '#'  || buffer[0] == ' ' ||
  65                    buffer[0] == '\t' || buffer[0] == '\n')
  66                 {
  67                         continue;
  68                 }
  69
  70                 s = buffer;
  71                 d = number;
  72
  73                 while(*s && (isdigit(*s)))
  74                         *d++ = *s++;
  75
  76                 *d = '\0';
  77
  78                 while(*s && (isspace(*s)))
  79                         s++;
  80
  81                 d = name;
  82
  83                 while(*s && (isprint(*s)))
  84                         *d++ = *s++;
  85
  86                 *d = '\0';
  87
  88                 if ((strlen(number) > 1) && (strlen(name) > 1))
  89                 {
  90                         if ((newa = (struct alias *) malloc(sizeof(struct alias))) == NULL)
  91                                 fatal("malloc failed for struct alias");
  92                         if ((newa->number = strdup(number)) == NULL)
  93                                 fatal("malloc failed for number alias");
  94                         if ((newa->name = strdup(name)) == NULL)
  95                                 fatal("malloc failed for name alias");
  96                         newa->next = NULL;
  97
  98                         if (firsta == NULL)
  99                         {
 100                                 firsta = newa;
 101                         }
 102                         else
 103                         {
 104                                 lasta->next = newa;
 105                         }
 106                         lasta = newa;
 107                 }
 108         }
 109         fclose(fp);
 110 }
 111
 112 /*---------------------------------------------------------------------------*
 113  *      read in and init aliases
 114  *---------------------------------------------------------------------------*/
 115 char *
 116 get_alias(char *number)
 117 {
 118         struct alias *ca = NULL;
 119
 120         if (firsta == NULL)
 121                 return(NULL);
 122
 123         ca = firsta;
 124
 125         for (;;)
 126         {
 127                 if (strlen(number) == strlen(ca->number))
 128                 {
 129                         if (!(strcmp(number, ca->number)))
 130                                 return(ca->name);
 131                 }
 132                 if (ca->next == NULL)
 133                         break;
 134                 ca = ca->next;
 135         }
 136         return(NULL);
 137 }
 138
 139 /* EOF */