Signal catching


 
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Old 11-20-2008
Quote:
Originally Posted by dark_knight
Why not?
I believe that in hnd I have the pointers to the default handlers
signal() is messy. It puts integers AND function pointers through the same argument and return value. 0 means SIG_DFL, 1 means SIG_IGN, anything else is presumed to be a function pointer. Your array of function pointers is going to be full of SIG_DFL's, which amounts to NULLs.
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pause(2)							   System Calls 							  pause(2)

NAME
pause - suspend process until signal SYNOPSIS
#include <unistd.h> int pause(void); DESCRIPTION
The pause() function suspends the calling process until it receives a signal. The signal must be one that is not currently set to be ignored by the calling process. If the signal causes termination of the calling process, pause() does not return. If the signal is caught by the calling process and control is returned from the signal-catching function (see signal(3C)), the calling process resumes execution from the point of suspension. RETURN VALUES
Since pause() suspends thread execution indefinitely unless interrupted by a signal, there is no successful completion return value. If interrupted, it returns -1 and sets errno to indicate the error. ERRORS
The pause() function will fail if: EINTR A signal is caught by the calling process and control is returned from the signal-catching function. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |Async-Signal-Safe | +-----------------------------+-----------------------------+ SEE ALSO
alarm(2), kill(2), signal(3C), wait(3C), attributes(5), standards(5) SunOS 5.11 28 Dec 1996 pause(2)