blob: 0c0b818d0e70ffa3078a8e75a6bbf4ff72859bd1 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
/*
* Copyright (c) 2022, Daniel Bertalan <dani@danielbertalan.dev>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibTest/TestCase.h>
#include <stdio.h>
#include <sys/wait.h>
#include <unistd.h>
// Test whether file writes are flushed to disk at program termination,
// even if we do not close the files or call fflush().
TEST_CASE(flush_on_exit)
{
static constexpr auto test_str = "peekaboo";
auto pid = fork();
VERIFY(pid >= 0);
if (pid == 0) {
auto* fp = fopen("/tmp/flushtest", "w");
VERIFY(fp != nullptr);
auto nwritten = fwrite(test_str, 1, strlen(test_str), fp);
VERIFY(nwritten != 0);
// We intentionally leak `fp` here.
exit(0);
} else {
int wstatus;
auto rc = waitpid(pid, &wstatus, 0);
VERIFY(rc >= 0);
char buf[256];
auto* fp = fopen("/tmp/flushtest", "r");
VERIFY(fp != nullptr);
auto* sp = fgets(buf, sizeof(buf), fp);
VERIFY(sp != nullptr);
fclose(fp);
unlink("/tmp/flushtest");
EXPECT_EQ(strcmp(test_str, buf), 0);
}
}
|
