Github user jpeach commented on a diff in the pull request:
https://github.com/apache/trafficserver/pull/568#discussion_r59631832
--- Diff: lib/ts/Diags.cc ---
@@ -816,29 +820,39 @@ Diags::set_stdout_output(const char *_bind_stdout)
if (strcmp(_bind_stdout, "") == 0)
return false;
- if (stdout_log) {
- delete stdout_log;
- stdout_log = NULL;
- }
-
- // create backing BaseLogFile for stdout
- stdout_log = new BaseLogFile(_bind_stdout);
+ BaseLogFile *old_stdout_log = stdout_log;
+ BaseLogFile *new_stdout_log = new BaseLogFile(_bind_stdout);
// on any errors we quit
- if (!stdout_log || stdout_log->open_file() !=
BaseLogFile::LOG_FILE_NO_ERROR) {
+ if (!new_stdout_log || new_stdout_log->open_file() !=
BaseLogFile::LOG_FILE_NO_ERROR) {
fprintf(stderr, "[Warning]: unable to open file=%s to bind stdout
to\n", _bind_stdout);
- delete stdout_log;
+ fprintf(stderr, "[Warning]: stdout is currently not bound to
anything\n");
+ delete new_stdout_log;
+ lock();
stdout_log = NULL;
+ unlock();
return false;
}
- if (!stdout_log->m_fp) {
+ if (!new_stdout_log->m_fp) {
fprintf(stderr, "[Warning]: file pointer for stdout %s = NULL\n",
_bind_stdout);
- delete stdout_log;
+ fprintf(stderr, "[Warning]: stdout is currently not bound to
anything\n");
+ delete new_stdout_log;
+ lock();
stdout_log = NULL;
+ unlock();
return false;
}
- return rebind_stdout(fileno(stdout_log->m_fp));
+ // now exchange the stdout_log pointer
+ lock();
+ stdout_log = new_stdout_log;
+ bool ret = rebind_stdout(fileno(new_stdout_log->m_fp));
--- End diff --
If this fails, are we in a well-defined state? No caller ever checks the
return value of this ... what would happen if it fails?
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
