siginterrupt(3B) manual page
Table of Contents
siginterrupt - allow signals to interrupt functions
/usr/ucb/cc
[ flag ... ] file ...
int siginterrupt( sig, flag)
int sig, flag;
siginterrupt() is used to change the function
restart behavior when a function is interrupted by the specified signal.
If the flag is false (0), then functions will be restarted if they are
interrupted by the specified signal and no data has been transferred yet.
System call restart is the default behavior when the signal(3C)
routine
is used.
If the flag is true (1)
, then restarting of functions is disabled.
If a function is interrupted by the specified signal and no data has been
transferred, the function will return -1 with errno set to EINTR
. Interrupted
functions that have started transferring data will return the amount of
data actually transferred.
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 caught.
Use of these interfaces should be restricted to
only applications written on BSD platforms. Use of these interfaces with
any of the system libraries or in multi-thread applications is unsupported.
This library routine uses an extension of the sigvec(3B)
function that
is not available in 4.2BSD
, hence it should not be used if backward compatibility
is needed.
A 0 value indicates that the call succeeded. A -1
value indicates that the call failed and errno is set to indicate the
error.
siginterrupt() may return the following error:
- EINVAL
- sig
is not a valid signal.
sigblock(3B)
, sigvec(3B)
, signal(3C)
Table of Contents