// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (c) International Business Machines Corp., 2001 * 03/2001 - Written by Wayne Boyer * Copyright (c) 2018 Cyril Hrubis */ /* * Create a message queue, then issue the IPC_SET command to lower the * msg_qbytes value. */ #include #include "tst_test.h" #include "tst_safe_sysv_ipc.h" #include "libnewipc.h" static int msg_id = -1; struct msqid_ds orig_buf; static void verify_msgctl(void) { struct msqid_ds buf = orig_buf; buf.msg_qbytes -= 1; TEST(msgctl(msg_id, IPC_SET, &buf)); if (TST_RET != 0) { tst_res(TFAIL | TTERRNO, "msgctl(IPC_SET) failed"); return; } tst_res(TPASS, "msgctl(IPC_SET) msg_qbytes - 1"); memset(&buf, 0, sizeof(buf)); SAFE_MSGCTL(msg_id, IPC_STAT, &buf); if (buf.msg_qbytes == orig_buf.msg_qbytes - 1) { tst_res(TPASS, "msg_qbytes = %lu", (unsigned long)buf.msg_qbytes); } else { tst_res(TFAIL, "msg_qbytes = %lu, expected %lu", (unsigned long)buf.msg_qbytes, (unsigned long)orig_buf.msg_qbytes - 1); } SAFE_MSGCTL(msg_id, IPC_SET, &orig_buf); } static void setup(void) { key_t msgkey = GETIPCKEY(); msg_id = SAFE_MSGGET(msgkey, IPC_CREAT | IPC_EXCL | MSG_RW | 0660); SAFE_MSGCTL(msg_id, IPC_STAT, &orig_buf); } static void cleanup(void) { if (msg_id >= 0) SAFE_MSGCTL(msg_id, IPC_RMID, NULL); } static struct tst_test test = { .setup = setup, .cleanup = cleanup, .test_all = verify_msgctl, .needs_tmpdir = 1 };