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) func
tion, 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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