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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | NOTES | HISTORY | SEE ALSO | COLOPHON |
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SD_VARLI...CRIPTION(3) sd_varlink_set_description SD_VARLI...CRIPTION(3)
sd_varlink_set_description, sd_varlink_get_description - Set or
query description of a Varlink connection object
#include <systemd/sd-varlink.h>
int sd_varlink_set_description(sd_varlink *link,
const char *description);
const char* sd_varlink_get_description(sd_varlink *link);
sd_varlink_set_description() sets the description string that is
used in logging to the specified string. The string is copied
internally and freed when the Varlink connection object is
deallocated. The description argument may be NULL, in which case
the description is unset.
sd_varlink_get_description() returns a description string for the
specified Varlink connection. This string may have been previously
set with sd_varlink_set_description(). If not set this way, a
default string or NULL may be returned, depending how the
connection was allocated and set up.
On success, sd_varlink_set_description() returns a non-negative
integer. On failure, it returns a negative errno-style error code.
sd_varlink_get_description() returns either NULL or a pointer to
the description string.
Errors
Returned errors may indicate the following problems:
-EINVAL
An argument is invalid.
-ENOMEM
Memory allocation failed.
Functions described here are available as a shared library, which
can be compiled against and linked to with the
libsystemd pkg-config(1) file.
The code described here uses getenv(3), which is declared to be
not multi-thread-safe. This means that the code calling the
functions described here must not call setenv(3) from a parallel
thread. It is recommended to only do calls to setenv() from an
early phase of the program when no other threads have been
started.
sd_varlink_set_description() was added in version 257.
sd_varlink_get_description() was added in version 258.
systemd(1), sd-varlink(3)
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 2025-08-11. (At that
time, the date of the most recent commit that was found in the
repository was 2025-08-11.) 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
systemd 258~rc2 SD_VARLI...CRIPTION(3)
Pages that refer to this page: systemd.directives(7), systemd.index(7)
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HTML rendering created 2025-09-06 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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