125 lines
3.7 KiB
C
125 lines
3.7 KiB
C
/*
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* Copyright (c) 1996, 1998, 1999 Todd C. Miller <Todd.Miller@courtesan.com>
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* All rights reserved.
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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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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* 4. Products derived from this software may not be called "Sudo" nor
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* may "Sudo" appear in their names without specific prior written
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* permission from the author.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include <stdio.h>
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#ifdef STDC_HEADERS
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#include <stdlib.h>
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#endif /* STDC_HEADERS */
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif /* HAVE_STRING_H */
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#ifdef HAVE_STRINGS_H
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#include <strings.h>
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#endif /* HAVE_STRINGS_H */
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#if defined(HAVE_MALLOC_H) && !defined(STDC_HEADERS)
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#include <malloc.h>
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#endif /* HAVE_MALLOC_H && !STDC_HEADERS */
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#include "compat.h"
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#if !defined(STDC_HEADERS) && !defined(__GNUC__)
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extern VOID *malloc __P((size_t));
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#endif /* !STDC_HEADERS && !gcc */
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#ifndef lint
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static const char rcsid[] = "$Sudo$";
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#endif /* lint */
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/*
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* putenv() places a string of the for "name=value" into the environment.
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* Note that this string becomes a part of the environment.
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*/
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int
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putenv(str)
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const char *str;
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{
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char **current;
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int matchlen, envlen=0;
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char *tmp;
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char **newenv;
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static int first=1;
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extern char ** environ;
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/*
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* Find out how much of str to match when searching
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* for a string to replace.
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*/
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if ((tmp = strchr(str, '=')) == NULL || tmp == str)
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matchlen = strlen(str);
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else
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matchlen = (int) (tmp - str);
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++matchlen;
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/*
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* Search for an existing string in the environment and find the
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* length of environ. If found, replace and exit.
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*/
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for (current=environ; *current; current++) {
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++envlen;
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if (strncmp(str, *current, matchlen) == 0) {
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/* found it, now insert the new version */
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*current = (char *)str;
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return(0);
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}
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}
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/*
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* There wasn't already a slot so add space for a new slot.
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* If this is our first time through, use malloc(), else realloc().
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*/
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if (first) {
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newenv = (char **) malloc(sizeof(char *) * (envlen + 2));
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if (newenv == NULL)
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return(-1);
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first=0;
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(void) memcpy(newenv, environ, sizeof(char *) * envlen);
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} else {
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newenv = (char **) realloc((char *)environ, sizeof(char *) * (envlen + 2));
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if (newenv == NULL)
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return(-1);
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}
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/* Actually add in the new entry... */
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environ = newenv;
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environ[envlen] = (char *)str;
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environ[envlen+1] = NULL;
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return(0);
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}
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