CINXE.COM
siginterrupt
<html> <head> <title>siginterrupt</title> <META NAME="KEYWORDS" CONTENT="siginterrupt"> </head> <body BGCOLOR="#ffffff" LINK="#0000ff" VLINK="#0000ff" ALINK="#0000ff" TEXT="#000000"> <center> <h1><b>siginterrupt</b></h1></center> <PRE> <STRONG><A HREF="/man3/SIGINTERRUPT">SIGINTERRUPT(3)</A></STRONG> Linux Programmer's Manual <STRONG><A HREF="/man3/SIGINTERRUPT">SIGINTERRUPT(3)</A></STRONG> 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 <STRONG><A HREF="/man7/feature_test_macros">feature_test_macros(7)</A></STRONG>): siginterrupt(): _XOPEN_SOURCE >= 500 || /* Since glibc 2.12: */ _POSIX_C_SOURCE >= 200809L || /* Glibc versions <= 2.19: */ _BSD_SOURCE 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. ATTRIBUTES For an explanation of the terms used in this section, see at- <STRONG><A HREF="/man7/tributes">tributes(7)</A></STRONG>. +---------------+---------------+-------------------------+ |Interface | Attribute | Value | +---------------+---------------+-------------------------+ |siginterrupt() | Thread safety | MT-Unsafe const:sigintr | +---------------+---------------+-------------------------+ CONFORMING TO 4.3BSD, POSIX.1-2001. POSIX.1-2008 marks siginterrupt() as obsolete, recommending the use of <STRONG><A HREF="/man2/sigaction">sigaction(2)</A></STRONG> with the SA_RESTART flag instead. SEE ALSO <STRONG><A HREF="/man2/signal">signal(2)</A></STRONG> COLOPHON This page is part of release 5.05 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. 2016-03-15 <STRONG><A HREF="/man3/SIGINTERRUPT">SIGINTERRUPT(3)</A></STRONG></PRE> <center> <h6>Man Pages Copyright Respective Owners. Site Copyright (C) 1994 - 2025 <a href="http://www.he.net">Hurricane Electric</a>. All Rights Reserved.</h6></center> </body> </html>