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/* Copyright (C) 1995,1996 Robert de Bath <rdebath@cix.compulink.co.uk>
* This file is part of the Linux-8086 C library and is distributed
* under the GNU Library General Public License.
*/
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <malloc.h>
#define ADD_NUM 4
int putenv (char *var)
{
static char **mall_env = 0;
static int extras = 0;
char **p, **d;
char *r;
int len;
r = strchr(var, '=');
if (r == 0)
len = strlen(var);
else
len = r - var;
if (!__environ) {
__environ = (char **) malloc(ADD_NUM * sizeof(char *));
memset(__environ, 0, sizeof(char *) * ADD_NUM);
extras = ADD_NUM;
}
for (p = __environ; *p; p++) {
if (memcmp(var, *p, len) == 0 && (*p)[len] == '=') {
while ((p[0] = p[1]))
p++;
extras++;
break;
}
}
if (r == 0)
return 0;
if (extras <= 0) { /* Need more space */
d = malloc((p - __environ + 1 + ADD_NUM) * sizeof(char *));
if (d == 0)
return -1;
memcpy((void *) d, (void *) __environ,
(p - __environ + 1) * sizeof(char *));
p = d + (p - __environ);
extras = ADD_NUM;
if (mall_env)
free(mall_env);
__environ = d;
mall_env = d;
}
*p++ = strdup((char *) var);
*p = '\0';
extras--;
return 0;
}
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