static void test_emlink(void)
{
if (max_subdirs == 0) {
tst_resm(TCONF, "EMLINK test is not appropriate");
return;
}
TEST(rename(TEST_EMLINK, TEST_NEW_EMLINK));
check_and_print(EMLINK);
if (TEST_RETURN == 0)
SAFE_RMDIR(cleanup, TEST_NEW_EMLINK);
}
int main(int ac, char **av)
{
int lc;
int rval;
pid_t pid, pid1;
int status;
/*
* parse standard options
*/
tst_parse_opts(ac, av, NULL, NULL);
/*
* perform global setup for test
*/
setup();
/*
* check looping state if -i option given
*/
for (lc = 0; TEST_LOOPING(lc); lc++) {
tst_count = 0;
if ((pid = FORK_OR_VFORK()) == -1) {
tst_brkm(TBROK, cleanup, "fork() #1 failed");
}
if (pid == 0) { /* first child */
/* set to nobody */
rval = setreuid(nobody_uid, nobody_uid);
if (rval < 0) {
tst_resm(TWARN, "setreuid failed to "
"to set the real uid to %d and "
"effective uid to %d",
nobody_uid, nobody_uid);
perror("setreuid");
exit(1);
}
/* create the a directory with 0700 permits */
if (mkdir(fdir, PERMS) == -1) {
tst_resm(TWARN, "mkdir(%s, %#o) Failed",
fdir, PERMS);
exit(1);
}
/* create "old" file under it */
SAFE_TOUCH(cleanup, fname, 0700, NULL);
exit(0);
}
/* wait for child to exit */
wait(&status);
if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) {
tst_brkm(TBROK, cleanup, "First child failed to set "
"up conditions for the test");
}
if ((pid1 = FORK_OR_VFORK()) == -1) {
tst_brkm(TBROK, cleanup, "fork() #2 failed");
}
if (pid1 == 0) { /* second child */
/* set to bin */
if ((rval = seteuid(bin_uid)) == -1) {
tst_resm(TWARN, "seteuid() failed");
perror("setreuid");
exit(1);
}
/* create "new" directory */
if (mkdir(mdir, PERMS) == -1) {
tst_resm(TWARN, "mkdir(%s, %#o) failed",
mdir, PERMS);
exit(1);
}
SAFE_TOUCH(cleanup, mname, 0700, NULL);
/* rename "old" to "new" */
TEST(rename(fname, mname));
if (TEST_RETURN != -1) {
tst_resm(TFAIL, "call succeeded unexpectedly");
continue;
}
if (TEST_ERRNO != EACCES) {
tst_resm(TFAIL, "Expected EACCES got %d",
TEST_ERRNO);
} else {
tst_resm(TPASS, "rename() returned EACCES");
}
/* set the process id back to root */
if (seteuid(0) == -1) {
tst_resm(TWARN, "seteuid(0) failed");
exit(1);
}
/* clean up things in case we are looping */
SAFE_UNLINK(cleanup, fname);
SAFE_UNLINK(cleanup, mname);
SAFE_RMDIR(cleanup, fdir);
SAFE_RMDIR(cleanup, mdir);
} else {
/* parent - let the second child carry on */
waitpid(pid1, &status, 0);
if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) {
exit(WEXITSTATUS(status));
} else {
exit(0);
}
}
}
/*
* cleanup and exit
*/
cleanup();
tst_exit();
}
