SIGINTERRUPTSection: Linux Programmer's Manual (3)
Index Return to Main Contents
NAMEsiginterrupt - 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)):
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. However, when a new signal handler is specified with the signal(2) function, the system call is interrupted by default.
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, or -1 if the signal number sig is invalid.
- The specified signal number is invalid.
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.
COLOPHONThis page is part of release 3.21 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.