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);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       siginterrupt(): _BSD_SOURCE || _XOPEN_SOURCE >= 500

DESCRIPTION

       The  siginterrupt()  function  changes  the  restart behavior 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 behavior  in  Linux.   How-
       ever, when a new signal handler is specified with the signal(2) function, the system call is interrupted by default.

       If  the	flag  argument	is  true (1) and no data has been transferred, then a system call interrupted by the signal sig will return -1 and
       errno will be set to EINTR.

       If the flag 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

       4.3BSD,	POSIX.1-2001.	POSIX.1-2008  marks  siginterrupt()  as  obsolete,  recommending  the use of sigaction(2) with the SA_RESTART flag
       instead.

SEE ALSO

       signal(2)

COLOPHON

       This page is part of release 3.25 of the Linux man-pages project.  A description of the project, and information about reporting bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

								    2009-03-15							   SIGINTERRUPT(3)