git: 9front

ref: 8d0d2ec80f06f3d7d8ba44313cd08eaef5d9b5d1
dir: /sys/src/cmd/upas/common/become.c/

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#include "common.h"
#include <auth.h>
#include <ndb.h>

/*
 *  become powerless user
 */
int
become(char **cmd, char *who)
{
	int fd;

	USED(cmd);
	if(strcmp(who, "none") == 0) {
		fd = open("#c/user", OWRITE);
		if(fd < 0 || write(fd, "none", strlen("none")) < 0) {
			werrstr("can't become none");
			return -1;
		}
		close(fd);
		if(newns("none", 0)) {
			werrstr("can't set new namespace");
			return -1;
		}
	}
	return 0;
}