X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=man%2Fsd_notify.xml;h=7d9689039727a4214b6908747cbfc15211f367dd;hp=eb449555cb4437342c17d02cdcd8a5484783dc7f;hb=7abfbe7903d8e792850ec39286a3d86e616a6477;hpb=5430f7f2bc7330f3088b894166bf3524a067e3d8 diff --git a/man/sd_notify.xml b/man/sd_notify.xml index eb449555c..7d9689039 100644 --- a/man/sd_notify.xml +++ b/man/sd_notify.xml @@ -45,7 +45,7 @@ sd_notify sd_notifyf - Notify init system about start-up completion and other daemon status changes + Notify service manager about start-up completion and other daemon status changes @@ -87,7 +87,7 @@ processes. The state parameter - should contain an newline-separated list of variable + should contain a newline-separated list of variable assignments, similar in style to an environment block. A trailing newline is implied if none is specified. The string may contain any kind of variable @@ -104,7 +104,7 @@ definition file has Type=notify set. The passed argument is a boolean "1" or "0". Since there is little - value in signalling non-readiness, the + value in signaling non-readiness, the only value daemons should send is "READY=1". @@ -156,12 +156,19 @@ WATCHDOG=1 Tells systemd to - update the watchdog timestamp. - Services using this feature should do - this in regular intervals. A watchdog - framework can use the timestamps to - detect failed - services. + update the watchdog timestamp. This is + the keep-alive ping that services need + to issue in regular intervals if + WatchdogSec= is + enabled for it. See + systemd.service5 + for details. It is recommended to send + this message if the + WATCHDOG_USEC= + environment variable has been set for + the service process, in every half the + time interval that is specified in the + variable. @@ -210,18 +217,18 @@ Internally, these functions send a single datagram with the state string as payload to the - AF_UNIX socket referenced in the + AF_UNIX socket referenced in the $NOTIFY_SOCKET environment variable. If the first character of - $NOTIFY_SOCKET is @ the string is + $NOTIFY_SOCKET is @ the string is understood as Linux abstract namespace socket. The datagram is accompanied by the process credentials of the sending daemon, using SCM_CREDENTIALS. For details about the algorithms check the liberally licensed reference implementation sources: - - resp. + and sd_notify() and @@ -231,12 +238,11 @@ sd-daemon.h files. These interfaces are available as shared library, which can be compiled and linked to with the - libsystemd-daemon - pkg-config1 + libsystemd-daemon pkg-config1 file. Alternatively, applications consuming these APIs may copy the implementation into their source tree. For more details about the reference implementation see - sd_daemon7. + sd-daemon3. If the reference implementation is used as drop-in files and -DDISABLE_SYSTEMD is set during @@ -247,7 +253,7 @@ Environment - + $NOTIFY_SOCKET @@ -303,7 +309,7 @@ See Also systemd1, - sd_daemon7, + sd-daemon3, daemon7, systemd.service5