diff options
author | Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> | 2018-01-20 14:23:54 +1100 |
---|---|---|
committer | Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> | 2018-01-20 15:11:54 +1100 |
commit | 89f552c0e26afd65fc0c825f843aeedc5d8ae29f (patch) | |
tree | 87c406a8f756fc1ad18dc2f7503edfcdc4db2712 /man/sd_journal_get_fd.xml | |
parent | 000b1ba5610524c1e5a28ec48a9dc990b9b301ac (diff) | |
download | systemd-89f552c0e26afd65fc0c825f843aeedc5d8ae29f.tar.gz |
man: document signal unsafeness of journal functions
Fixes #7912.
Diffstat (limited to 'man/sd_journal_get_fd.xml')
-rw-r--r-- | man/sd_journal_get_fd.xml | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/man/sd_journal_get_fd.xml b/man/sd_journal_get_fd.xml index b162b2bf11..24ececd9cb 100644 --- a/man/sd_journal_get_fd.xml +++ b/man/sd_journal_get_fd.xml @@ -231,6 +231,20 @@ else { </refsect1> <refsect1> + <title>Signal safety</title> + + <para>In general, <function>sd_journal_get_fd()</function>, + <function>sd_journal_get_events()</function>, and <function>sd_journal_get_timeout()</function> + are <emphasis>not</emphasis> "async signal safe" in the meaning of + <citerefentry project='man-pages'><refentrytitle>signal</refentrytitle><manvolnum>7</manvolnum></citerefentry>. + Nevertheless, only the first call to any of those three functions performs unsafe operations, so + subsequent calls <emphasis>are</emphasis> safe.</para> + + <para><function>sd_journal_process()</function> and <function>sd_journal_wait()</function> are not + safe. <function>sd_journal_reliable_fd()</function> is safe.</para> + </refsect1> + + <refsect1> <title>Notes</title> <para>The <function>sd_journal_get_fd()</function>, |