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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | ATTRIBUTES | CONFORMING TO | SEE ALSO | COLOPHON |
SIGINTERRUPT(3) Linux Programmer's Manual SIGINTERRUPT(3)
siginterrupt - allow signals to interrupt system calls
#include <signal.h>
int siginterrupt(int sig, int flag);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
siginterrupt():
_XOPEN_SOURCE >= 500
|| /* Since glibc 2.12: */ _POSIX_C_SOURCE >= 200809L
|| /* Glibc versions <= 2.19: */ _BSD_SOURCE
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.
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.
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.
EINVAL The specified signal number is invalid.
For an explanation of the terms used in this section, see
attributes(7).
┌───────────────┬───────────────┬─────────────────────────┐
│Interface │ Attribute │ Value │
├───────────────┼───────────────┼─────────────────────────┤
│siginterrupt() │ 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.
signal(2)
This page is part of release 4.12 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 SIGINTERRUPT(3)
Pages that refer to this page: sigaction(2), signal(2)