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| author | Lennart Poettering <lennart@poettering.net> | 2017-02-06 20:01:24 +0100 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2017-02-06 20:01:24 +0100 |
| commit | aa2039457911cc89adbf73e8a9b26ce99110e23d (patch) | |
| tree | 317e8dd888363c709dc650d132014a77189e9e16 /man/systemd-notify.xml | |
| parent | b3bb64767abacc5b759255a698c89b3495cd54f4 (diff) | |
| download | systemd-aa2039457911cc89adbf73e8a9b26ce99110e23d.tar.gz | |
notify: document that we fake the PID when sending sd_notify()
Diffstat (limited to 'man/systemd-notify.xml')
| -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> |