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| -rw-r--r-- | man/systemd-notify.xml | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/man/systemd-notify.xml b/man/systemd-notify.xml index 9bb35a3a0c..8c56a6b8ed 100644 --- a/man/systemd-notify.xml +++ b/man/systemd-notify.xml @@ -83,6 +83,13 @@ <function>sd_notify()</function> message and immediately exits, the service manager might not be able to properly attribute the message to the unit, and thus will ignore it, even if <varname>NotifyAccess=</varname><option>all</option> is set for it.</para> + + <para><command>systemd-notify</command> will first attempt to invoke <function>sd_notify()</function> pretending to + have the PID of the invoking process. This will only succeed when invoked with sufficient privileges. On failure, + it will then fall back to invoking it under its own PID. This behaviour is useful in order that when the tool is + invoked from a shell script the shell process — and not the <command>systemd-notify</command> process — appears as + sender of the message, which in turn is helpful if the shell process is the main process of a service, due to the + limitations of <varname>NotifyAccess=</varname><option>all</option> described above.</para> </refsect1> <refsect1> |