diff options
author | Shuah Khan <skhan@linuxfoundation.org> | 2024-09-24 09:56:46 -0600 |
---|---|---|
committer | Shuah Khan <skhan@linuxfoundation.org> | 2024-09-30 11:37:55 -0600 |
commit | ba872972002bd1e9ae89c397307a079e04ee289a (patch) | |
tree | dc727d957af3b528880240252143bde5b512dd25 /tools/testing/selftests/timers | |
parent | 1ad999870a86d58246b6a614a435d055a9edf269 (diff) |
selftests:timers: posix_timers: Fix warn_unused_result in __fatal_error()
__fatal_error routine doesn't check strerror_r() return value,
which results in the following compile time warning:
posix_timers.c: In function ‘__fatal_error’:
posix_timers.c:31:9: warning: ignoring return value of ‘strerror_r’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
31 | strerror_r(errno, buf, sizeof(buf));
Fix this by adding a check for return value and error handling appropriate
for the GNU-specific strerror_r() in use in __fatal_error(). Check if
return string is null and handle accordingly.
From Linux strerror_r() manual page:
"The GNU-specific strerror_r() returns a pointer to a string containing
the error message. This may be either a pointer to a string that the
function stores in buf, or a pointer to some (immutable) static string
(in which case buf is unused). If the function stores a string in buf,
then at most buflen bytes are stored (the string may be truncated if
buflen is too small and errnum is unknown). The string always includes
a terminating null byte."
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Acked-by: John Stultz <jstultz@google.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Diffstat (limited to 'tools/testing/selftests/timers')
-rw-r--r-- | tools/testing/selftests/timers/posix_timers.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/tools/testing/selftests/timers/posix_timers.c b/tools/testing/selftests/timers/posix_timers.c index 16bd49492efa..ddb1cebc844e 100644 --- a/tools/testing/selftests/timers/posix_timers.c +++ b/tools/testing/selftests/timers/posix_timers.c @@ -26,13 +26,17 @@ static void __fatal_error(const char *test, const char *name, const char *what) { char buf[64]; + char *ret_str = NULL; - strerror_r(errno, buf, sizeof(buf)); + ret_str = strerror_r(errno, buf, sizeof(buf)); - if (name && strlen(name)) - ksft_exit_fail_msg("%s %s %s %s\n", test, name, what, buf); + if (name && strlen(name) && ret_str) + ksft_exit_fail_msg("%s %s %s %s\n", test, name, what, ret_str); + else if (ret_str) + ksft_exit_fail_msg("%s %s %s\n", test, what, ret_str); else - ksft_exit_fail_msg("%s %s %s\n", test, what, buf); + ksft_exit_fail_msg("%s %s\n", test, what); + } #define fatal_error(name, what) __fatal_error(__func__, name, what) |