Hello,

I'd like to know if there's some way of blocking signals to a certain
process. Even if it sets a handler with signal or sigaction I want the
signal to never arrive to the process. Is there any way of doing that?

I noticed that if I block the signal and then fork a child process, if
the child sets a signal handler, then it's able to get the signals. In
particular, I want to block SIGALRM to ever reaching some process.

I'm using linux, so linux-specific solutions are ok.

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On Sun, 24 Jun 2007 03:30:12 -0300 Rafael Almeida <rafaelc@dcc.ufmg.br> wrot
e:
| Hello,
|
| I'd like to know if there's some way of blocking signals to a certain
| process. Even if it sets a handler with signal or sigaction I want the
| signal to never arrive to the process. Is there any way of doing that?
|
| I noticed that if I block the signal and then fork a child process, if
| the child sets a signal handler, then it's able to get the signals. In
| particular, I want to block SIGALRM to ever reaching some process.
|
| I'm using linux, so linux-specific solutions are ok.

You can do it from within the process:

man sigsetmask


If you want to do it from outside the process:

man ptrace

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