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Full Discussion: Trying to block signal
Top Forums UNIX for Dummies Questions & Answers Trying to block signal Post 302465388 by methyl on Friday 22nd of October 2010 10:05:28 AM
Old 10-22-2010
I have no idea what the relevence of DGPickett's post is.

The ctrl/z is being picked up by shell before it gets to your program. In foreground ctrl/z is commonly mapped to SUSP (suspend). The program can be brought to foreground with the "fg" Shell command.

To see the mapping of the various control keys in your session:
Code:
stty -a

Each and every one of these can (and often will) be disabled or changed to suit individual terminals or applications. See "man stty" for your O/S.

Many people re-map INTR to ctrl/c for consistency with MSDOS but on many terminals it is not mapped to anything by default.
This User Gave Thanks to methyl For This Post:
 

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pause(2)							System Calls Manual							  pause(2)

NAME
pause - suspend process until signal SYNOPSIS
DESCRIPTION
suspends the calling process until it receives a signal. The signal must be one that is not currently set to be ignored or blocked (masked) by the calling process. If the signal causes termination of the calling process, does not return. If the signal is by the calling process and control is returned from the signal-catching function (see signal(5)), the calling process resumes execution from the point of suspension; with a return value of -1 from and set to APPLICATION USAGE
Threads Considerations Signal dispositions (such as catch/default/ignore) are shared by all threads in the process and blocked signal masks are maintained by each thread. Therefore, the signals being waited for should not be ignored by the process or blocked by the calling thread. will suspend only the calling thread until it receives a signal. If other threads in the process do not block the signal, the signal may be delivered to another thread in the process and the thread in may continue waiting. For this reason, the use of is recommended instead of for multi-threaded applications. For more information regarding signals and threads, refer to signal(5). SEE ALSO
alarm(2), kill(2), sigwait(2), wait(2), signal(5). STANDARDS CONFORMANCE
pause(2)
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