/*
 * DF-3184 chain test: as an unpriv user, stat /procN/<pid>/* while the
 * scratch mount is live, print stat results, sleep, exit; the instrumented
 * kernel then reports the walk's "marked=" count.
 */
#include <sys/stat.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>

int main(int argc, char **argv)
{
	char p[128];
	struct stat st;
	int i, ok = 0, fail = 0;
	int sleep_s = argc > 1 ? atoi(argv[1]) : 3;
	static const char *t[] = { "status", "cmdline", "map", "type",
		"rlimit", "regs", "fpregs", "dbregs", "ctl", "note",
		"notepg", "file", NULL };

	snprintf(p, sizeof(p), "/procN/%d", (int)getpid());
	if (stat(p, &st) < 0)
		printf("dir stat FAIL: %s\n", strerror(errno));
	else {
		printf("dir stat OK\n");
		ok++;
	}
	for (i = 0; t[i]; i++) {
		snprintf(p, sizeof(p), "/procN/%d/%s", (int)getpid(), t[i]);
		if (stat(p, &st) < 0) {
			printf("%s FAIL: %s\n", t[i], strerror(errno));
			fail++;
		} else {
			printf("%s OK\n", t[i]);
			ok++;
		}
	}
	printf("CHAIN pid=%d ok=%d fail=%d sleeping %ds\n",
	       (int)getpid(), ok, fail, sleep_s);
	fflush(stdout);
	sleep(sleep_s);
	_exit(0);
}