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