SIGINTERRUPT(3) 	   Linux Programmers Manual	      SIGINTERRUPT(3)



NAME
       siginterrupt - allow signals to interrupt system calls

SYNOPSIS
       #include 

       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 speci
       fied signal sig.  This is the default behavior in Linux.  However, when
       a new signal handler is specified with the signal(2) function, the sys
       tem 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 the
       global variable 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.

SEE ALSO
       signal(2)

COLOPHON
       This  page  is  part of release 3.05 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/.



				  2007-07-26		       SIGINTERRUPT(3)