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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | EXIT STATUS | SEE ALSO | COLOPHON |
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SYSTEMD-ESCAPE(1) systemd-escape SYSTEMD-ESCAPE(1)
systemd-escape - Escape strings for usage in systemd unit names
systemd-escape [OPTIONS...] [STRING...]
systemd-escape may be used to escape strings for inclusion in
systemd unit names. The command may be used to escape and to undo
escaping of strings.
The command takes any number of strings on the command line, and
will process them individually, one after another. It will output
them separated by spaces to stdout.
By default, this command will escape the strings passed, unless
--unescape is passed which results in the inverse operation being
applied. If --mangle is given, a special mode of escaping is
applied instead, which assumes the string is already escaped but
will escape everything that appears obviously non-escaped.
For details on the escaping and unescaping algorithms see the
relevant section in systemd.unit(5).
The following options are understood:
--suffix=
Appends the specified unit type suffix to the escaped string.
Takes one of the unit types supported by systemd, such as
"service" or "mount". May not be used in conjunction with
--template=, --unescape or --mangle.
Added in version 216.
--template=
Inserts the escaped strings in a unit name template. Takes a
unit name template such as [email protected]. With --unescape,
expects instantiated unit names for this template and
extracts and unescapes just the instance part. May not be
used in conjunction with --suffix=, --instance or --mangle.
Added in version 216.
--path, -p
When escaping or unescaping a string, assume it refers to a
file system path. This simplifies the path (leading,
trailing, and duplicate "/" characters are removed, no-op
path "." components are removed, and for absolute paths,
leading ".." components are removed). After the
simplification, the path must not contain "..".
This is particularly useful for generating strings suitable
for unescaping with the "%f" specifier in unit files, see
systemd.unit(5).
Added in version 216.
--unescape, -u
Instead of escaping the specified strings, undo the escaping,
reversing the operation. May not be used in conjunction with
--suffix= or --mangle.
Added in version 216.
--mangle, -m
Like --escape, but only escape characters that are obviously
not escaped yet, and possibly automatically append an
appropriate unit type suffix to the string. May not be used
in conjunction with --suffix=, --template= or --unescape.
Added in version 216.
--instance
With --unescape, unescape and print only the instance part of
an instantiated unit name template. Results in an error for
an uninstantiated template like [email protected] or a
non-template name like ssh.service. Must be used in
conjunction with --unescape and may not be used in
conjunction with --template.
Added in version 240.
-h, --help
Print a short help text and exit.
--version
Print a short version string and exit.
To escape a single string:
$ systemd-escape 'Hallöchen, Meister'
Hall\xc3\xb6chen\x2c\x20Meister
To undo escaping on a single string:
$ systemd-escape -u 'Hall\xc3\xb6chen\x2c\x20Meister'
Hallöchen, Meister
To generate the mount unit for a path:
$ systemd-escape -p --suffix=mount "/tmp//waldi/foobar/"
tmp-waldi-foobar.mount
To generate instance names of three strings:
$ systemd-escape [email protected] 'My Container 1' 'containerb' 'container/III'
systemd-nspawn@My\x20Container\x201.service [email protected] [email protected]
To extract the instance part of an instantiated unit:
$ systemd-escape -u --instance 'systemd-nspawn@My\x20Container\x201.service'
My Container 1
To extract the instance part of an instance of a particular
template:
$ systemd-escape -u [email protected] 'systemd-nspawn@My\x20Container\x201.service'
My Container 1
On success, 0 is returned, a non-zero failure code otherwise.
systemd(1), systemd.unit(5), systemctl(1)
This page is part of the systemd (systemd system and service
manager) project. Information about the project can be found at
⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have
a bug report for this manual page, see
⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.
This page was obtained from the project's upstream Git repository
⟨https://github.com/systemd/systemd.git⟩ on 2024-06-14. (At that
time, the date of the most recent commit that was found in the
repository was 2024-06-13.) 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
[email protected]
systemd 257~devel SYSTEMD-ESCAPE(1)
Pages that refer to this page: systemd.unit(5), systemd.directives(7), systemd.index(7)
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HTML rendering created 2024-06-26 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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