1*49cdfc7eSAndroid Build Coastguard Worker // SPDX-License-Identifier: GPL-2.0-or-later
2*49cdfc7eSAndroid Build Coastguard Worker /*
3*49cdfc7eSAndroid Build Coastguard Worker * Copyright (c) 2017 Carlo Marcelo Arenas Belon <[email protected]>
4*49cdfc7eSAndroid Build Coastguard Worker * Copyright (c) 2018 Cyril Hrubis <[email protected]>
5*49cdfc7eSAndroid Build Coastguard Worker * Copyright (c) Linux Test Project, 2003-2023
6*49cdfc7eSAndroid Build Coastguard Worker */
7*49cdfc7eSAndroid Build Coastguard Worker
8*49cdfc7eSAndroid Build Coastguard Worker /*\
9*49cdfc7eSAndroid Build Coastguard Worker * [Description]
10*49cdfc7eSAndroid Build Coastguard Worker *
11*49cdfc7eSAndroid Build Coastguard Worker * Tests for a special case NULL buffer with size 0 is expected to return 0.
12*49cdfc7eSAndroid Build Coastguard Worker */
13*49cdfc7eSAndroid Build Coastguard Worker
14*49cdfc7eSAndroid Build Coastguard Worker #include "tst_test.h"
15*49cdfc7eSAndroid Build Coastguard Worker
16*49cdfc7eSAndroid Build Coastguard Worker static int fd;
17*49cdfc7eSAndroid Build Coastguard Worker
verify_write(void)18*49cdfc7eSAndroid Build Coastguard Worker static void verify_write(void)
19*49cdfc7eSAndroid Build Coastguard Worker {
20*49cdfc7eSAndroid Build Coastguard Worker TST_EXP_POSITIVE(write(fd, NULL, 0));
21*49cdfc7eSAndroid Build Coastguard Worker
22*49cdfc7eSAndroid Build Coastguard Worker TST_EXP_EXPR(TST_RET == 0, "write(fd, NULL, %ld) == %d", TST_RET, 0);
23*49cdfc7eSAndroid Build Coastguard Worker }
24*49cdfc7eSAndroid Build Coastguard Worker
setup(void)25*49cdfc7eSAndroid Build Coastguard Worker static void setup(void)
26*49cdfc7eSAndroid Build Coastguard Worker {
27*49cdfc7eSAndroid Build Coastguard Worker fd = SAFE_OPEN("test_file", O_RDWR | O_CREAT, 0700);
28*49cdfc7eSAndroid Build Coastguard Worker }
29*49cdfc7eSAndroid Build Coastguard Worker
cleanup(void)30*49cdfc7eSAndroid Build Coastguard Worker static void cleanup(void)
31*49cdfc7eSAndroid Build Coastguard Worker {
32*49cdfc7eSAndroid Build Coastguard Worker if (fd > 0)
33*49cdfc7eSAndroid Build Coastguard Worker SAFE_CLOSE(fd);
34*49cdfc7eSAndroid Build Coastguard Worker }
35*49cdfc7eSAndroid Build Coastguard Worker
36*49cdfc7eSAndroid Build Coastguard Worker static struct tst_test test = {
37*49cdfc7eSAndroid Build Coastguard Worker .setup = setup,
38*49cdfc7eSAndroid Build Coastguard Worker .cleanup = cleanup,
39*49cdfc7eSAndroid Build Coastguard Worker .test_all = verify_write,
40*49cdfc7eSAndroid Build Coastguard Worker .needs_tmpdir = 1,
41*49cdfc7eSAndroid Build Coastguard Worker };
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