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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) International Business Machines Corp., 2001
*
* HISTORY
* 03/2001 - Written by Wayne Boyer
*/
/*\
* [DESCRIPTION]
*
* Test for semctl() EPERM error
*
* Runs IPC_SET and IPC_RMID from unprivileged child process.
*
\*/
#include <pwd.h>
#include <sys/wait.h>
#include "tst_safe_sysv_ipc.h"
#include "tst_test.h"
#include "lapi/sem.h"
#include "libnewipc.h"
static uid_t ltp_uid;
static int sem_id = -1;
static int tcases[] = { IPC_SET, IPC_RMID };
static void do_child(void)
{
int i;
union semun arg;
struct semid_ds perm;
for (i = 0; i < 2; i++) {
if (tcases[i] == IPC_SET) {
arg.buf = &perm;
memset(&perm, 0, sizeof(perm));
perm.sem_perm.uid = getuid() + 1;
perm.sem_perm.gid = getgid() + 1;
perm.sem_perm.mode = 0666;
}
TST_EXP_FAIL(semctl(sem_id, 0, tcases[i], arg), EPERM,
"semctl() with nobody user in child");
}
}
static void verify_semctl(void)
{
pid_t pid;
pid = SAFE_FORK();
if (pid == 0) {
SAFE_SETEUID(ltp_uid);
do_child();
} else {
SAFE_WAITPID(pid, NULL, 0);
}
}
static void setup(void)
{
static key_t semkey;
semkey = GETIPCKEY();
sem_id = SAFE_SEMGET(semkey, PSEMS, IPC_CREAT | IPC_EXCL);
struct passwd *ltpuser = SAFE_GETPWNAM("nobody");
ltp_uid = ltpuser->pw_uid;
}
static void cleanup(void)
{
if (sem_id != -1)
SAFE_SEMCTL(sem_id, 0, IPC_RMID);
}
static struct tst_test test = {
.setup = setup,
.cleanup = cleanup,
.forks_child = 1,
.needs_root = 1,
.test_all = verify_semctl,
};
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