#include <errno.h>
#include <sched.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>

main(int argc, char* argv[]) {
	int i;
	char nspath[1024];
	char *namespaces[] = { "ipc", "uts", "net", "pid", "mnt" };

	if (geteuid()) { fprintf(stderr, "%s\n", "abort: you want to run this as root"); exit(1); }
	if (argc != 2) { fprintf(stderr, "%s\n", "abort: you must provide a PID as the sole argument"); exit(2); }

	for (i=0; i<5; i++) {
		sprintf(nspath, "/proc/%s/ns/%s", argv[1], namespaces[i]);
		int fd = open(nspath, O_RDONLY);
		
		if (setns(fd, 0) == -1) { 
			fprintf(stderr, "setns on %s namespace failed: %s\n", namespaces[i], strerror(errno));
		} else {
			fprintf(stdout, "setns on %s namespace succeeded\n", namespaces[i]);
		}

		close(fd);
	}
}