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sd_varlink_set_description(3) — Linux manual page

SD_VARLI...CRIPTION(3)  sd_varlink_set_descriptionSD_VARLI...CRIPTION(3)

NAME        top

       sd_varlink_set_description, sd_varlink_get_description - Set or       query description of a Varlink connection object

SYNOPSIS        top

#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);

DESCRIPTION        top

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. Thedescription argument may beNULL, 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 withsd_varlink_set_description(). If not set this way, a       default string orNULLmay be returned, depending how the       connection was allocated and set up.

RETURN VALUE        top

       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 eitherNULLor a pointer to       the description string.Errors       Returned errors may indicate the following problems:-EINVAL           An argument is invalid.-ENOMEM           Memory allocation failed.

NOTES        top

       Functions described here are available as a shared library, which       can be compiled against and linked to with thelibsystemd pkg-config(1) file.       The code described here usesgetenv(3), which is declared to be       not multi-thread-safe. This means that the code calling the       functions described here must not callsetenv(3) from a parallel       thread. It is recommended to only do calls tosetenv()from an       early phase of the program when no other threads have been       started.

HISTORY        top

sd_varlink_set_description()was added in version 257.sd_varlink_get_description()was added in version 258.

SEE ALSO        top

systemd(1),sd-varlink(3)

COLOPHON        top

       This page is part of thesystemd (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 isnot part of the original manual page), send a mail to       man-pages@man7.orgsystemd 258~rc2SD_VARLI...CRIPTION(3)

Pages that refer to this page:systemd.directives(7), systemd.index(7)

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