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Posted to c-dev@axis.apache.org by "Robert Lazarski (Jira)" <ji...@apache.org> on 2026/01/20 22:23:00 UTC
[jira] [Comment Edited] (AXIS2C-1663) Race condition in axutil_dir_handler_list_service_or_module_dirs
[ https://issues.apache.org/jira/browse/AXIS2C-1663?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18053160#comment-18053160 ]
Robert Lazarski edited comment on AXIS2C-1663 at 1/20/26 10:22 PM:
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Tagging this for possible inclusion into 2.0.1.
fix requires rewriting dir_select() and the
scandir pattern (or adding synchronization), it's non-trivial work.
Fix Options (in order of preference):
1. Use opendir/readdir with absolute paths - Eliminate chdir by
building full paths for stat calls. Most robust fix.
2. Use fstatat() with dirfd - Open directory with opendir(), get fd
with dirfd(), use fstatat(fd, name, ...) instead of stat().
POSIX-compliant, avoids chdir.
3. Add mutex - Quick fix: wrap the getcwd/chdir/scandir/chdir sequence
in a mutex. Simple but adds locking overhead.
4. Document as not thread-safe - Mark function as single-threaded
only.
was (Author: robertlazarski):
Tagging this for possible inclusion into 2.0.1.
fix requires rewriting dir_select() and the
scandir pattern (or adding synchronization), it's non-trivial work.
1. Use opendir/readdir with absolute paths - Eliminate chdir by
building full paths for stat calls. Most robust fix.
2. Use fstatat() with dirfd - Open directory with opendir(), get fd
with dirfd(), use fstatat(fd, name, ...) instead of stat().
POSIX-compliant, avoids chdir.
3. Add mutex - Quick fix: wrap the getcwd/chdir/scandir/chdir sequence
in a mutex. Simple but adds locking overhead.
4. Document as not thread-safe - Mark function as single-threaded
only.
> Race condition in axutil_dir_handler_list_service_or_module_dirs
> ----------------------------------------------------------------
>
> Key: AXIS2C-1663
> URL: https://issues.apache.org/jira/browse/AXIS2C-1663
> Project: Axis2-C
> Issue Type: Bug
> Affects Versions: 1.6.0
> Reporter: mehturt
> Priority: Major
> Fix For: 2.0.1
>
>
> I'm calling a web service from multiple threads using the sample code provided (axis2_svc_client_send_receive). When the web service is invoked in parallel in multiple threads, the current working directory of the process changes. I was able to track this down and I think the problem is in function axutil_dir_handler_list_service_or_module_dirs() which performs getcwd and then changes directory to somewhere and back.
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