00b67f09dd
Also known as ISC bind. This import adds utilities such as host(1), dig(1), and nslookup(1), as well as many other tools and libraries. Change-Id: I035ca46e64f1965d57019e773f4ff0ef035e4aa3
169 lines
4.5 KiB
C
169 lines
4.5 KiB
C
/* $NetBSD: strlist.c,v 1.1.1.1 2015/07/08 15:37:48 christos Exp $ */
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/*****************************************************************
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**
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** @(#) strlist.c (c) Mar 2005 Holger Zuleger
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**
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** TODO: Maybe we should use a special type for the list:
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** typedef struct { char cnt; char list[0+1]; } strlist__t;
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** This results in better type control of the function parameters
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**
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** Copyright (c) Mar 2005, Holger Zuleger HZnet. All rights reserved.
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**
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** This software is open source.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** Redistributions of source code must retain the above copyright notice,
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** this list of conditions and the following disclaimer.
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**
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** Redistributions in binary form must reproduce the above copyright notice,
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** this list of conditions and the following disclaimer in the documentation
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** and/or other materials provided with the distribution.
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**
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** Neither the name of Holger Zuleger HZnet nor the names of its contributors may
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** be used to endorse or promote products derived from this software without
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** specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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** TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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** PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
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** LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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** CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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** SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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** INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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** CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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** ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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** POSSIBILITY OF SUCH DAMAGE.
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**
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*****************************************************************/
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#ifdef TEST
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# include <stdio.h>
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#endif
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#include <string.h>
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#include <stdlib.h>
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#include "strlist.h"
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/*****************************************************************
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** prepstrlist (str, delim)
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** prepare a string with delimiters to a so called strlist.
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** 'str' is a list of substrings delimited by 'delim'
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** The # of strings is stored at the first byte of the allocated
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** memory. Every substring is stored as a '\0' terminated C-String.
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** The function returns a pointer to dynamic allocated memory
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*****************************************************************/
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char *prepstrlist (const char *str, const char *delim)
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{
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char *p;
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char *new;
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int len;
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int cnt;
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if ( str == NULL )
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return NULL;
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len = strlen (str);
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if ( (new = malloc (len + 2)) == NULL )
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return new;
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cnt = 0;
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p = new;
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for ( *p++ = '\0'; *str; str++ )
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{
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if ( strchr (delim, *str) == NULL )
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*p++ = *str;
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else if ( p[-1] != '\0' )
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{
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*p++ = '\0';
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cnt++;
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}
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}
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*p = '\0'; /*terminate string */
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if ( p[-1] != '\0' )
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cnt++;
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*new = cnt & 0xFF;
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return new;
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}
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/*****************************************************************
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** isinlist (str, list)
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** check if 'list' contains 'str'
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*****************************************************************/
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int isinlist (const char *str, const char *list)
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{
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int cnt;
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if ( list == NULL || *list == '\0' )
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return 1;
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if ( str == NULL || *str == '\0' )
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return 0;
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cnt = *list;
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while ( cnt-- > 0 )
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{
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list++;
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if ( strcmp (str, list) == 0 )
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return 1;
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list += strlen (list);
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}
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return 0;
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}
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/*****************************************************************
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** unprepstrlist (list, delimc)
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*****************************************************************/
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char *unprepstrlist (char *list, char delimc)
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{
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char *p;
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int cnt;
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cnt = *list & 0xFF;
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p = list;
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for ( *p++ = delimc; cnt > 1; p++ )
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if ( *p == '\0' )
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{
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*p = delimc;
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cnt--;
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}
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return list;
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}
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#ifdef TEST
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main (int argc, char *argv[])
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{
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FILE *fp;
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char *p;
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char *searchlist = NULL;
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char group[255];
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if ( argc > 1 )
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searchlist = prepstrlist (argv[1], LISTDELIM);
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printf ("searchlist: %d entrys: \n", searchlist[0]);
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if ( (fp = fopen ("/etc/group", "r")) == NULL )
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exit (fprintf (stderr, "can't open file\n"));
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while ( fscanf (fp, "%[^:]:%*[^\n]\n", group) != EOF )
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if ( isinlist (group, searchlist) )
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printf ("%s\n", group);
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fclose (fp);
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printf ("searchlist: \"%s\"\n", unprepstrlist (searchlist, *LISTDELIM));
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for ( p = searchlist; *p; p++ )
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if ( *p < 32 )
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printf ("<%d>", *p);
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else
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printf ("%c", *p);
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printf ("\n");
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}
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#endif
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