72 lines
1.5 KiB
C
72 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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* 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 EACCES error.
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*
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* Create a shared memory segment without read or write permissions under
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* unpriviledged user and call shmget() with SHM_RD/SHM_WR/SHM_RW flag to
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* trigger EACCES error.
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*/
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/ipc.h>
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#include <stdlib.h>
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#include <pwd.h>
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#include <sys/shm.h>
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#include "tst_safe_sysv_ipc.h"
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#include "tst_test.h"
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#include "libnewipc.h"
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#include "lapi/shm.h"
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static int shm_id = -1;
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static key_t shmkey;
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static struct tcase {
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char *message;
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int flag;
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} tcases[] = {
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{"Testing SHM_RD flag", SHM_RD},
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{"Testing SHM_WR flag", SHM_WR},
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{"Testing SHM_RW flag", SHM_RW},
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};
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static void verify_shmget(unsigned int n)
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{
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struct tcase *tc = &tcases[n];
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tst_res(TINFO, "%s", tc->message);
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TST_EXP_FAIL2(shmget(shmkey, SHM_SIZE, tc->flag), EACCES, "shmget(%i, %i, %i)",
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shmkey, SHM_SIZE, tc->flag);
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}
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static void setup(void)
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{
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struct passwd *pw;
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pw = SAFE_GETPWNAM("nobody");
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SAFE_SETUID(pw->pw_uid);
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shmkey = GETIPCKEY();
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shm_id = SAFE_SHMGET(shmkey, SHM_SIZE, IPC_CREAT | IPC_EXCL);
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}
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static void cleanup(void)
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{
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if (shm_id >= 0)
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SAFE_SHMCTL(shm_id, IPC_RMID, NULL);
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}
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static struct tst_test test = {
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.needs_tmpdir = 1,
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.needs_root = 1,
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.setup = setup,
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.cleanup = cleanup,
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.test = verify_shmget,
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.tcnt = ARRAY_SIZE(tcases),
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};
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