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You may experience 2 up to 10 seconds "glitch time" when we restart MySQL. We expect to make these adjustments around 1AM Eastern Daylight Saving Time (EDT) US.

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SunOS 5.10 - man page for bsd_signal (sunos section 3c)

bsd_signal(3C)						   Standard C Library Functions 					    bsd_signal(3C)

bsd_signal - simplified signal facilities
#include <signal.h> void (*bsd_signal(int sig, void (*func)(int)))(int);
The bsd_signal() function provides a partially compatible interface for programs written to historical system interfaces (see USAGE below). The function call bsd_signal(sig, func) has an effect as if implemented as: void (*bsd_signal(int sig, void (*func)(int)))(int) { struct sigaction act, oact; act.sa_handler = func; act.sa_flags = SA_RESTART; sigemptyset(&act.sa_mask); sigaddset(&act.sa_mask, sig); if (sigaction(sig, &act, &oact) == -1) return(SIG_ERR); return(oact.sa_handler); } The handler function should be declared: void handler(int sig); where sig is the signal number. The behavior is undefined if func is a function that takes more than one argument, or an argument of a different type.
Upon successful completion, bsd_signal() returns the previous action for sig. Otherwise, SIG_ERR is returned and errno is set to indicate the error.
Refer to sigaction(2).
This function is a direct replacement for the BSD signal(3UCB) function for simple applications that are installing a single-argument sig- nal handler function. If a BSD signal handler function is being installed that expects more than one argument, the application has to be modified to use sigaction(2). The bsd_signal() function differs from signal(3UCB) in that the SA_RESTART flag is set and the SA_RESETHAND will be clear when bsd_signal() is used. The state of these flags is not specified for signal(3UCB).
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+
sigaction(2), sigaddset(3C), sigemptyset(3C), signal(3UCB), attributes(5), standards(5) SunOS 5.10 24 Jul 2002 bsd_signal(3C)

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