• 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.
  However, 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 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.
  POSIX.1-2008 marks
  siginterrupt ()
  as obsolete.
  
• SEE ALSO
  
  signal(2)
  
• COLOPHON
  
  This page is part of release 3.19 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/.
  

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