SIGINTERRUPT(3)     Linux Programmer's Manual     SIGINTERRUPT(3)

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)  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)

                          April 13, 1993                        1