mirror of
git://git.gnupg.org/gnupg.git
synced 2024-11-04 20:38:50 +01:00
59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
|
/* unsetenv.c - libc replacement function
|
||
|
|
* Copyright (C) 2004 Free Software Foundation, Inc.
|
||
|
|
*
|
||
|
|
* This file is part of GnuPG.
|
||
|
|
*
|
||
|
|
* GnuPG is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation; either version 2 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* GnuPG is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <config.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <errno.h>
|
||
|
|
|
||
|
|
extern char **environ;
|
||
|
|
|
||
|
|
/* Basically borrowed from glibc */
|
||
|
|
int
|
||
|
|
unsetenv2 (const char *name)
|
||
|
|
{
|
||
|
|
size_t len;
|
||
|
|
char **ep;
|
||
|
|
|
||
|
|
if (name == NULL || *name == '\0' || strchr (name, '=') != NULL)
|
||
|
|
{
|
||
|
|
errno=EINVAL;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
len = strlen (name);
|
||
|
|
|
||
|
|
ep = environ;
|
||
|
|
while (*ep != NULL)
|
||
|
|
if (!strncmp (*ep, name, len) && (*ep)[len] == '=')
|
||
|
|
{
|
||
|
|
/* Found it. Remove this pointer by moving later ones back. */
|
||
|
|
char **dp = ep;
|
||
|
|
|
||
|
|
do
|
||
|
|
dp[0] = dp[1];
|
||
|
|
while (*dp++);
|
||
|
|
/* Continue the loop in case NAME appears again. */
|
||
|
|
}
|
||
|
|
else
|
||
|
|
++ep;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|