Re^2: application crash during WINCH Signal

Hi bliako

Sorry if I could not follow you comment, but the quote on the signal reference you did says that it is recommended to use the STRING, and not the numbers.

We are recovering this application that it was unfortunately abandoned, so we are still getting familiar with the code.

I did read the kill reference some time ago and I did not see any reason why change it.

I changed the kill line to

kill 'WINCH' => $EXP -> pid if $EXP -> pid;
[download]

It made not difference

Comment on Re^2: application crash during WINCH Signal Download Code

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Re^3: application crash during WINCH Signal by bliako (Abbot) on Nov 28, 2019 at 18:37 UTC
I was merely saying that using a signal name, e.g. `kill "WINCH" => $pid` is the most straight-forward way to specify a signal. I am not sure if using constant `WINCH` (like your code is doing) is as safe. That's why I mentioned it. At least you don't use numbers e.g. `kill 10 => $pid` which is obviously ~~wrong~~ non-portable. Your handler propagates the WINCH signal further down all the way to the shell. In your handler you can at least monitor the pids sent the WINCH and see which one crashes. Is it perl? Is it bash? Is it ssh? I have put the link about a WINCH-related crash in the post above.	[reply] [d/l] [select]
Re^4: application crash during WINCH Signal by hanspr (Sexton) on Nov 28, 2019 at 18:58 UTC
I have monitored the pid with strace, or think I did, as in the first post. It is a bash shell, but I it happens with : bash, ssh, zsh. But essentialy is bash because the ssh connections are lunched using bash too. If I comment the complete WINCH routine, like this `#$SIG{'WINCH'} = sub { # if (!$CONNECTED) { # return 1; # } # while (!$EXP->slave) { # #select(undef, undef, undef, 0.1); # }; # $EXP->slave->clone_winsize_from(\*STDIN); # kill 'WINCH' => $EXP -> pid if $EXP -> pid; # return 1; #};` [download] It will not get disconnected, but the terminal will not be aware of the window size change So, is in did something related to the propagation of the winch signal.	[reply] [d/l]