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| author | Lennart Poettering <lennart@poettering.net> | 2019-04-08 14:43:37 +0200 |
|---|---|---|
| committer | Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> | 2019-04-08 15:09:30 +0200 |
| commit | 30ab7a519ebecccd164f1c352d8afef97132f6f2 (patch) | |
| tree | cc28410746e8857ff0decdc7f258e2259bf326ae /man/sd_event_add_io.xml | |
| parent | units: add time-set.target (diff) | |
| download | systemd-30ab7a519ebecccd164f1c352d8afef97132f6f2.tar.xz systemd-30ab7a519ebecccd164f1c352d8afef97132f6f2.zip | |
man: elaborate on fd ownership in sd_event_add_io(3)
Replaces: #12239
Diffstat (limited to 'man/sd_event_add_io.xml')
| -rw-r--r-- | man/sd_event_add_io.xml | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/man/sd_event_add_io.xml b/man/sd_event_add_io.xml index 4f2b09bf59..398b938e3c 100644 --- a/man/sd_event_add_io.xml +++ b/man/sd_event_add_io.xml @@ -161,6 +161,12 @@ "floating", and will be destroyed implicitly when the event loop itself is destroyed.</para> + <para>Note that this call does not take possession of the file descriptor passed in, ownership (and thus + the duty to close it when it is no longer needed) remains with the caller. However, with the + <function>sd_event_source_set_io_fd_own()</function> call (see below) the event source may optionally + take ownership of the file descriptor after the event source has been created. In that case the file + descriptor is closed automatically as soon as the event source is released.</para> + <para>It is recommended to use <function>sd_event_add_io()</function> only in conjunction with file descriptors that have <constant>O_NONBLOCK</constant> set, to |