git: 9front

ref: f2a4f349a8a68d1759c180b9edb77e3dfb67c6b4
dir: /sys/src/libc/9sys/putenv.c/

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#include <u.h>
#include <libc.h>

int
putenv(char *name, char *val)
{
	int f;
	char ename[100];
	long s;

	if(strchr(name, '/') != nil)
		return -1;
	snprint(ename, sizeof ename, "/env/%s", name);
	if(strcmp(ename+5, name) != 0)
		return -1;
	f = create(ename, OWRITE, 0664);
	if(f < 0)
		return -1;
	s = strlen(val);
	if(write(f, val, s) != s){
		close(f);
		return -1;
	}
	close(f);
	return 0;
}