A return value of SIG_ERR indicates an error in that case, errno is set to EINVAL.įor more information about return codes, see errno, _doserrno, _sys_errlist, and _sys_nerr. For example, if the previous value of func was SIG_IGN, the return value is also SIG_IGN. Signal returns the previous value of func that's associated with the given signal. The first parameter is a signal value, and the second parameter is a subcode that can be used when the first parameter is SIGFPE. The second parameter is a pointer to the function to be executed. Syntax void _cdecl *signal(int sig, int (*func)(int, int)) For more information, see UWP app lifecycle. Programmatic or UI ways to close a Store app are not permitted according to the Microsoft Store policies. Do not use this method to shut down a Microsoft Store app, except in testing or debugging scenarios.
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