systemd sd_varlink_set_description 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. Returned errors may indicate the following problems: -EINVAL An argument is invalid. -ENOMEM Memory allocation failed. sd_varlink_set_description() was added in version 257. sd_varlink_get_description() was added in version 258. systemd1 sd-varlink3