siginterrupt (3) - Linux Man Pages
siginterrupt: allow signals to interrupt system calls
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)):
_XOPEN_SOURCE >= 500
|| /* Since glibc 2.12: */ _POSIX_C_SOURCE >= 200809L
|| /* Glibc versions <= 2.19: */ _BSD_SOURCE
DESCRIPTIONThe 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.
RETURN VALUEThe 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.
- The specified signal number is invalid.
ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7).
|siginterrupt()||Thread safety||MT-Unsafe const:sigintr|
CONFORMING TO4.3BSD, 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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