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#include <unistd.h>
#include <sys/types.h>
#include <fcntl.h>
#include <malloc.h>
#include <sys/stat.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
int main (int argc,char *argv[]) {
char *n0 = NULL;
struct stat *buf1 = NULL;
int ret = 0;
n0 = argv[1];
buf1 = calloc (1, sizeof (*buf1));
gid_t list[3] = {65533, 65532, 65531};
creat (n0, 0644);
chown (n0, 65534, 65533);
chmod (n0, 06555);
setgroups (3, &list);
setuid (65534);
chown (n0, 65534, 65532);
ret = stat (n0, buf1);
if (ret == -1) {
printf ("stat error, error no = %d",errno);
exit (EXIT_FAILURE);
}
if (buf1->st_gid != 65532)
exit (EXIT_FAILURE);
free (buf1);
exit (EXIT_SUCCESS);
}
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