sd_varlink_set_relative_timeout — Set method call time-out
#include <systemd/sd-varlink.h>
int sd_varlink_set_relative_timeout( | sd_varlink *link, |
uint64_t usec); |
sd_varlink_set_relative_timeout() sets the relative timeout in µs 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.
On success, sd_varlink_set_relative_timeout() returns a non-negative integer. On
failure, it returns a negative errno-style error code.
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.