SD_VARLINK_SET_RELATIVE_TIMEOUT(3)             sd_varlink_set_relative_timeout

NAME
       sd_varlink_set_relative_timeout - Set method call time-out

SYNOPSIS
       #include <systemd/sd-varlink.h>

       int sd_varlink_set_relative_timeout(sd_varlink *link, uint64_t usec);

DESCRIPTION
       sd_varlink_set_relative_timeout() sets the relative timeout in <micro>s
       to enforce on Varlink method calls. A default time-out of 45s
       (currently) applies, which may be changed with this call. Set to
       UINT64_MAX to disable the time-out, and to 0 to revert to revert back
       to the default time-out. The time-out begins whenever a method call is
       started, and if no response is received by the time the time-out
       elapses a synthetic io.systemd.TimedOut error is raised as
       client-generated reply to the method call.

       This call is particularly useful for method calls issued via
       sd_varlink_observe() that shall remain open continuously for a long
       time.

RETURN VALUE
       On success, sd_varlink_set_relative_timeout() returns a non-negative
       integer. On failure, it returns a negative errno-style error code.

   Errors
       Returned errors may indicate the following problems:

       -EINVAL
           An argument is invalid.

NOTES
       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.

HISTORY
       sd_varlink_set_relative_timeout() was added in version 257.

SEE ALSO
       systemd(1), sd-varlink(3)

systemd 259                                 SD_VARLINK_SET_RELATIVE_TIMEOUT(3)