Section (3) siginterrupt
siginterrupt — allow signals to interrupt system calls
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
This is the default behavior in Linux.
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
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.
returns 0 on success. It returns −1 if the signal
errno set to
indicate the cause of the error.
For an explanation of the terms used in this section, see attributes(7).
||Thread safety||MT-Unsafe const:sigintr|
4.3BSD, POSIX.1-2001. POSIX.1-2008 marks
siginterrupt() as obsolete, recommending
the use of sigaction(2) with the
SA_RESTART flag instead.
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and the latest version of this page, can be found at
Copyright 1993 David Metcalfe (davidprism.demon.co.uk)
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Linux libc source code
Lewine_zsingle_quotesz_s _POSIX Programmer_zsingle_quotesz_s Guide_ (O_zsingle_quotesz_Reilly & Associates, 1991)
386BSD man pages
Modified Sun Jul 25 10:40:51 1993 by Rik Faith (faithcs.unc.edu)
Modified Sun Apr 14 16:20:34 1996 by Andries Brouwer (aebcwi.nl)