linux man page for siginterrupt

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():

	   Since glibc 2.12
	       _BSD_SOURCE || _XOPEN_SOURCE >= 500 || _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED || _POSIX_C_SOURCE >= 200809L ||
	       _XOPEN_SOURCE >= 700

	   Before glibc 2.12
	       _BSD_SOURCE || _XOPEN_SOURCE >= 500 || _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED

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 3.27 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/.

								    2010-09-20							   SIGINTERRUPT(3)