siginterrupt(3) -- Linux man page
NAME
siginterrupt - allow signals to interrupt system calls
SYNOPSIS
#include <signal.h>
int siginterrupt(int sig, int flag);
DESCRIPTION
The siginterrupt() function changes the restart behaviour when
a system call is interrupted by the signal sig. If the flag
argument is false (0), then system calls will be restarted if interrupted
by the specified signal sig. This is the default behaviour in
Linux. However, when a new signal handler is specified with the
signal(2) function, the system call is interrupted by default.
If the flags argument is true (1) and no data has been transferred,
then a system call interrupted by the signal sig will return -1
and the global variable errno will be set to EINTR.
If the flags argument is true (1) and data transfer has started,
then the system call will be interrupted and will return the actual
amount of data transferred.
RETURN VALUE
The siginterrupt() function returns 0 on success, or -1 if the
signal number sig is invalid.
ERRORS
- EINVAL
-
The specified signal number is invalid.
CONFORMING TO
BSD 4.3
SEE ALSO
signal(2)
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