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#include "config.h"
#include <stdarg.h>
#include <stddef.h>
#include <setjmp.h>
#include <cmocka.h>
#include <pthread.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <grp.h>
#ifdef HAVE_SYS_SYSCALL_H
#include <sys/syscall.h>
#endif
#ifdef HAVE_SYSCALL_H
#include <syscall.h>
#endif
#define NUM_THREADS 10
#define ARRAY_SIZE(a) (sizeof(a)/sizeof(a[0]))
struct parm {
int id;
int ready;
};
pthread_mutex_t msg_mutex = PTHREAD_MUTEX_INITIALIZER;
static void *syscall_setreuid(void *arg)
{
long int rc;
uid_t ru;
(void) arg; /* unused */
/* This load can help with revealing race conditions. */
for (ru = 0; ru < 2048; ++ru) {
uid_t ruid, euid, suid;
rc = syscall(SYS_setreuid, -1, ru);
assert_int_equal(rc, 0);
#ifdef HAVE_GETRESUID
ruid = euid = suid = -1;
rc = getresuid(&ruid, &euid, &suid);
assert_int_equal(ruid, 0);
assert_int_equal(euid, ru);
assert_int_equal(suid, ru);
#endif
ruid = getuid();
assert_int_equal(ruid, 0);
euid = geteuid();
assert_int_equal(euid, ru);
rc = syscall(SYS_setreuid, -1, 0);
assert_int_equal(rc, 0);
#ifdef HAVE_GETRESUID
ruid = euid = suid = -1;
rc = getresuid(&ruid, &euid, &suid);
assert_int_equal(ruid, 0);
assert_int_equal(euid, 0);
assert_int_equal(suid, ru);
#endif
ruid = getuid();
assert_int_equal(ruid, 0);
euid = geteuid();
assert_int_equal(euid, 0);
}
return NULL;
}
static void *sync_setreuid(void *arg)
{
struct parm *p = (struct parm *)arg;
uid_t u;
syscall_setreuid(arg);
p->ready = 1;
pthread_mutex_lock(&msg_mutex);
u = geteuid();
assert_int_equal(u, 42);
pthread_mutex_unlock(&msg_mutex);
return NULL;
}
static void test_sync_setreuid(void **state)
{
pthread_attr_t pthread_custom_attr;
pthread_t threads[NUM_THREADS];
struct parm *p;
int rc;
int i;
(void) state; /* unused */
pthread_attr_init(&pthread_custom_attr);
p = malloc(NUM_THREADS * sizeof(struct parm));
assert_non_null(p);
pthread_mutex_lock(&msg_mutex);
for (i = 0; i < NUM_THREADS; i++) {
p[i].id = i;
p[i].ready = 0;
pthread_create(&threads[i],
&pthread_custom_attr,
sync_setreuid,
(void *)&p[i]);
}
/* wait for the threads to set euid to 0 */
for (i = 0; i < NUM_THREADS; i++) {
while (p[i].ready != 1) {
sleep(1);
}
}
rc = setreuid(-1, 42);
assert_int_equal(rc, 0);
pthread_mutex_unlock(&msg_mutex);
for (i = 0; i < NUM_THREADS; i++) {
pthread_join(threads[i], NULL);
}
pthread_attr_destroy(&pthread_custom_attr);
free(p);
}
int main(void) {
int rc;
const struct CMUnitTest thread_tests[] = {
cmocka_unit_test(test_sync_setreuid),
};
rc = cmocka_run_group_tests(thread_tests, NULL, NULL);
return rc;
}
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