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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 ||
           _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED
           || /* Since glibc 2.12: */ _POSIX_C_SOURCE >= 200809L
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.
       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.  It returns -1 if the
       signal number sig is invalid, with errno set to indicate the  cause  of
       the error.
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 3.53 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/.

                                  2013-04-19                   SIGINTERRUPT(3)