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README: Update documentation for pidfile() fn

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Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
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Joachim Nilsson
2016-01-06 13:31:32 +01:00
parent 805571a7ef
commit ce3bd4ec8a
1 changed files with 9 additions and 5 deletions
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README.md
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@@ -176,20 +176,24 @@ Generic Functions
- `pidfile(basename)`
Write a daemon pid file. Creates a pidfile in `_PATH_VARRUN` using
either `basename` or, if `basename` is `NULL`, `__progname`. The
file name has the form `/var/run/basename.pid`.
Create a daemon PID file in `_PATH_VARRUN` using either `basename` or,
if `basename` is `NULL`, `__progname`. The file name has the form
`/var/run/basename.pid`.
Use this function to create a pid file for your daemon when it is
Use this function to create a PID file for your daemon when it is
ready to receive signals. A client application may poll for the
existence of this file, so make sure to have your signal handlers
properly setup before calling this function.
The pidfile is removed when the program exits, using an `atexit()`
handler. However, depending on how the program terminates the file
may still exist even though the program is no longer running. This
is only a problem for clients.
Calling this function multiple times updates the mtime of the file.
Only one `atexit()` handler is created, regardless of the amount of
times the function is called.
See below for link to OpenBSD man page.
- `pidfile_read(pidfile)`