mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-13 08:40:07 +00:00
87 lines
2.4 KiB
C
87 lines
2.4 KiB
C
/* Copyright (C) 1992 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If
|
|
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
|
|
Cambridge, MA 02139, USA. */
|
|
|
|
#include <ansidecl.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#ifndef HAVE_GNU_LD
|
|
#define __environ environ
|
|
#endif
|
|
|
|
int
|
|
DEFUN(setenv, (name, value, replace),
|
|
CONST char *name AND CONST char *value AND int replace)
|
|
{
|
|
register char **ep;
|
|
register size_t size;
|
|
CONST size_t namelen = strlen (name);
|
|
CONST size_t vallen = strlen (value);
|
|
|
|
size = 0;
|
|
for (ep = __environ; *ep != NULL; ++ep)
|
|
if (!strncmp (*ep, name, namelen) && (*ep)[namelen] == '=')
|
|
break;
|
|
else
|
|
++size;
|
|
|
|
if (*ep == NULL)
|
|
{
|
|
static char **last_environ = NULL;
|
|
char **new_environ = (char **) malloc((size + 2) * sizeof(char *));
|
|
if (new_environ == NULL)
|
|
return -1;
|
|
(void) memcpy((PTR) new_environ, (PTR) __environ, size * sizeof(char *));
|
|
|
|
new_environ[size] = malloc (namelen + 1 + vallen + 1);
|
|
if (new_environ[size] == NULL)
|
|
{
|
|
free (new_environ);
|
|
errno = ENOMEM;
|
|
return -1;
|
|
}
|
|
memcpy (new_environ[size], name, namelen);
|
|
new_environ[size][namelen] = '=';
|
|
memcpy (&new_environ[size][namelen + 1], value, vallen + 1);
|
|
|
|
new_environ[size + 1] = NULL;
|
|
|
|
if (last_environ != NULL)
|
|
free ((PTR) last_environ);
|
|
last_environ = new_environ;
|
|
__environ = new_environ;
|
|
}
|
|
else if (replace)
|
|
{
|
|
size_t len = strlen (*ep);
|
|
if (len < namelen + 1 + vallen)
|
|
{
|
|
char *new = malloc (namelen + 1 + vallen);
|
|
if (new == NULL)
|
|
return -1;
|
|
*ep = new;
|
|
}
|
|
memcpy (*ep, name, namelen);
|
|
(*ep)[namelen] = '=';
|
|
memcpy (&(*ep)[namelen + 1], value, vallen + 1);
|
|
}
|
|
|
|
return 0;
|
|
}
|