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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 || _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED || /* Since glibc 2.12: */ _POSIX_C_SOURCE >= 200809L
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.
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.
CONFORMING TO
4.3BSD, POSIX.1-2001. POSIX.1-2008 marks siginterrupt() as obsolete, recommending the use of
sigaction(2) with the SA_RESTART flag instead.
SEE ALSO
signal(2)
COLOPHON
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information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.
2013-04-19 SIGINTERRUPT(3)