|SIGINTERRUPT(3)||Library Functions Manual||SIGINTERRUPT(3)|
sig, int flag);
siginterrupt() function is used to change the system call restart behavior when a system call is interrupted by the specified signal. If flag is false (0), system calls will be restarted if they are interrupted by the specified signal sig and no data has been transferred yet. System call restart is the default behavior on OpenBSD.
If flag is true (1), the restarting of
system calls is disabled. If a system call is interrupted by the specified
signal and no data has been transferred, the system call will return -1 with
the global variable errno set to
EINTR. Interrupted system calls that have started
transferring data will return the amount of data actually transferred.
System call interrupt is the signal behavior found on
BSD systems prior to 4.2BSD
as well as most systems based upon AT&T System V
Programs may switch between restartable and interruptible system
call operation as often as desired in the execution of a program. Issuing a
siginterrupt() call during the execution of a signal
handler will cause the new action to take place on the next signal to be
siginterrupt() returns 0 on success or -1 if an invalid signal number has been specified.
siginterrupt() function appeared in 4.3BSD.
|June 5, 2013||OpenBSD-current|