1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
/*
* Copyright (c) 1996, 1998, 1999 Todd C. Miller <Todd.Miller@courtesan.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 4. Products derived from this software may not be called "Sudo" nor
* may "Sudo" appear in their names without specific prior written
* permission from the author.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include <stdio.h>
#ifdef STDC_HEADERS
#include <stdlib.h>
#endif /* STDC_HEADERS */
#ifdef HAVE_STRING_H
#include <string.h>
#endif /* HAVE_STRING_H */
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif /* HAVE_STRINGS_H */
#if defined(HAVE_MALLOC_H) && !defined(STDC_HEADERS)
#include <malloc.h>
#endif /* HAVE_MALLOC_H && !STDC_HEADERS */
#include "compat.h"
#if !defined(STDC_HEADERS) && !defined(__GNUC__)
extern VOID *malloc __P((size_t));
#endif /* !STDC_HEADERS && !gcc */
#ifndef lint
static const char rcsid[] = "$Sudo$";
#endif /* lint */
/*
* putenv() places a string of the for "name=value" into the environment.
* Note that this string becomes a part of the environment.
*/
int
putenv(str)
const char *str;
{
char **current;
int matchlen, envlen=0;
char *tmp;
char **newenv;
static int first=1;
extern char ** environ;
/*
* Find out how much of str to match when searching
* for a string to replace.
*/
if ((tmp = strchr(str, '=')) == NULL || tmp == str)
matchlen = strlen(str);
else
matchlen = (int) (tmp - str);
++matchlen;
/*
* Search for an existing string in the environment and find the
* length of environ. If found, replace and exit.
*/
for (current=environ; *current; current++) {
++envlen;
if (strncmp(str, *current, matchlen) == 0) {
/* found it, now insert the new version */
*current = (char *)str;
return(0);
}
}
/*
* There wasn't already a slot so add space for a new slot.
* If this is our first time through, use malloc(), else realloc().
*/
if (first) {
newenv = (char **) malloc(sizeof(char *) * (envlen + 2));
if (newenv == NULL)
return(-1);
first=0;
(void) memcpy(newenv, environ, sizeof(char *) * envlen);
} else {
newenv = (char **) realloc((char *)environ, sizeof(char *) * (envlen + 2));
if (newenv == NULL)
return(-1);
}
/* Actually add in the new entry... */
environ = newenv;
environ[envlen] = (char *)str;
environ[envlen+1] = NULL;
return(0);
}
|