72 lines
1.4 KiB
C
72 lines
1.4 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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* 03/2001 - Written by Wayne Boyer
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* Copyright (c) 2018 Cyril Hrubis <chrubis@suse.cz>
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*/
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/*
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* Create a message queue, then issue the IPC_SET command to lower the
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* msg_qbytes value.
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*/
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#include <errno.h>
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#include "tst_test.h"
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#include "tst_safe_sysv_ipc.h"
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#include "libnewipc.h"
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static int msg_id = -1;
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struct msqid_ds orig_buf;
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static void verify_msgctl(void)
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{
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struct msqid_ds buf = orig_buf;
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buf.msg_qbytes -= 1;
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TEST(msgctl(msg_id, IPC_SET, &buf));
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if (TST_RET != 0) {
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tst_res(TFAIL | TTERRNO, "msgctl(IPC_SET) failed");
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return;
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}
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tst_res(TPASS, "msgctl(IPC_SET) msg_qbytes - 1");
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memset(&buf, 0, sizeof(buf));
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SAFE_MSGCTL(msg_id, IPC_STAT, &buf);
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if (buf.msg_qbytes == orig_buf.msg_qbytes - 1) {
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tst_res(TPASS, "msg_qbytes = %lu",
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(unsigned long)buf.msg_qbytes);
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} else {
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tst_res(TFAIL, "msg_qbytes = %lu, expected %lu",
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(unsigned long)buf.msg_qbytes,
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(unsigned long)orig_buf.msg_qbytes - 1);
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}
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SAFE_MSGCTL(msg_id, IPC_SET, &orig_buf);
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}
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static void setup(void)
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{
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key_t msgkey = GETIPCKEY();
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msg_id = SAFE_MSGGET(msgkey, IPC_CREAT | IPC_EXCL | MSG_RW | 0660);
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SAFE_MSGCTL(msg_id, IPC_STAT, &orig_buf);
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}
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static void cleanup(void)
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{
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if (msg_id >= 0)
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SAFE_MSGCTL(msg_id, IPC_RMID, NULL);
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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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.test_all = verify_msgctl,
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.needs_tmpdir = 1
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};
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