osf1 man page for siginterrupt

siginterrupt(3) 					     Library Functions Manual						   siginterrupt(3)

NAME
       siginterrupt - Allows signals to interrupt functions

LIBRARY
       Standard C Library (libc.so, libc.a)

       Berkeley Compatibility Library (libbsd.a)

SYNOPSIS
       #include <signal.h>	  /* libc version */

       int siginterrupt(
	       int sig,
	       int flag) ;

STANDARDS
       Interfaces documented on this reference page conform to industry standards as follows:

       siginterrupt() (libc version):  XSH4.2

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

PARAMETERS
       Specifies  the expected interrupt signal.  Indicates whether the function is to restart when interrupted by the specified signal.  When the
       flag parameter is TRUE, restart is disabled. When the flag parameter is FALSE, restart is enabled.

DESCRIPTION
       The siginterrupt() function is used to change the restart behavior of a system call when it is interrupted by the signal specified  by  the
       sig  parameter.	When the flag parameter is FALSE (0), system calls restart when they are interrupted by the sig signal and no data has yet
       been transferred.

       When the flag parameter is TRUE (1), restart of system calls is disabled.  When a system call is interrupted by the sig signal and no  data
       has  been  transferred, the function returns a value of -1 with errno set to [EINTR]. Otherwise, interrupted system calls that have started
       transferring data return a value that is the number of data bytes actually transferred.

       [Tru64 UNIX]  System call interrupt is the default behavior unless the calling program has been linked with  the  libbsd  library  and  the
       libbsd version of signal() has been used.

NOTES
       The  siginterrupt()  function  is  provided  for  compatibility with BSD systems.  When writing or rewriting portable applications, use the
       sigaction() function with the SA_RESTART flag instead of siginterrupt().

       The use of the siginterrupt() function does not affect signal-handling semantics in any other way.  Programs may switch between restartable
       and interruptible system call operation as often as desired in the execution of a program.

       Issuing	a  siginterrupt()  call during the execution of a signal handler causes the new action to take place when the next instance of the
       specified signal is caught.

RETURN VALUES
       Upon successful completion, siginterrupt() returns a value of 0 (zero). Otherwise, a value of -1 is returned to indicate  that  an  invalid
       signal value has been used.

ERRORS
       If  the	siginterrupt()	function fails, errno may be set to the following value: The value of the sig parameter does not represent a valid
       signal.

RELATED INFORMATION
       Functions: sigaction(2), sigprocmask(2), sigsuspend(2)

       Standards: standards(5) delim off

																   siginterrupt(3)