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HTML rendering created 2025-02-02 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | COLOPHON |
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PMLOCK(1) General Commands Manual PMLOCK(1)
pmlock - simple file-based mutex
$PCP_BINADM_DIR/pmlock [-i ident] [-v] file
pmlock attempts to acquire an exclusive lock by creating a zero-
sized file with a mode of 0.
The -i option changes the behaviour to write ident into file,
followed by a newline and the file mode is 0444. ident is an
arbitrary string, but by convention it is the process id of the
locker followed by the name or identification of the locker
command or script.
The exit status is 0 for success, 1 for failure.
To release the lock, remove file with rm(1) or unlink(2).
In the event of a failure, the -v option produces an explanatory
message on stderr.
rm(1) and unlink(2).
This page is part of the PCP (Performance Co-Pilot) project.
Information about the project can be found at
⟨http://www.pcp.io/⟩. If you have a bug report for this manual
page, send it to pcp@groups.io. This page was obtained from the
project's upstream Git repository
⟨https://github.com/performancecopilot/pcp.git⟩ on 2025-02-02.
(At that time, the date of the most recent commit that was found
in the repository was 2025-01-30.) If you discover any rendering
problems in this HTML version of the page, or you believe there is
a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
Performance Co-Pilot PCP PMLOCK(1)
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HTML rendering created 2025-02-02 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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