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selftests/nolibc: add testcase for pipe

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Add a test case of pipe that sends and receives message in a single
process.

Suggested-by: Thomas Weißschuh <thomas@t-8ch.de>
Suggested-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/all/c5de2d13-3752-4e1b-90d9-f58cca99c702@t-8ch.de/
Signed-off-by: Yuan Tan <tanyuan@tinylab.org>
Reviewed-by: Thomas Weißschuh <linux@weissschuh.net>
[wt: fixed the "len" type to size_t to address a sign-compare warning
 with upcoming patches]
Signed-off-by: Willy Tarreau <w@1wt.eu>
This commit is contained in:
Yuan Tan 2023-08-01 23:40:23 +08:00 committed by Willy Tarreau
parent 3ec38af6ee
commit 5c01259b12
1 changed files with 22 additions and 0 deletions
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22
tools/testing/selftests/nolibc/nolibc-test.c
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@ -768,6 +768,27 @@ end:
return !!ret;
}
static int test_pipe(void)
{
const char *const msg = "hello, nolibc";
int pipefd[2];
char buf[32];
size_t len;
if (pipe(pipefd) == -1)
return 1;
write(pipefd[1], msg, strlen(msg));
close(pipefd[1]);
len = read(pipefd[0], buf, sizeof(buf));
close(pipefd[0]);
if (len != strlen(msg))
return 1;
return !!memcmp(buf, msg, len);
}
/* Run syscall tests between IDs <min> and <max>.
* Return 0 on success, non-zero on failure.
@ -853,6 +874,7 @@ int run_syscall(int min, int max)
CASE_TEST(mmap_munmap_good); EXPECT_SYSZR(1, test_mmap_munmap()); break;
CASE_TEST(open_tty); EXPECT_SYSNE(1, tmp = open("/dev/null", 0), -1); if (tmp != -1) close(tmp); break;
CASE_TEST(open_blah); EXPECT_SYSER(1, tmp = open("/proc/self/blah", 0), -1, ENOENT); if (tmp != -1) close(tmp); break;
CASE_TEST(pipe); EXPECT_SYSZR(1, test_pipe()); break;
CASE_TEST(poll_null); EXPECT_SYSZR(1, poll(NULL, 0, 0)); break;
CASE_TEST(poll_stdout); EXPECT_SYSNE(1, ({ struct pollfd fds = { 1, POLLOUT, 0}; poll(&fds, 1, 0); }), -1); break;
CASE_TEST(poll_fault); EXPECT_SYSER(1, poll((void *)1, 1, 0), -1, EFAULT); break;