[dolphin] [Bug 431044] Terminal panel interrupts sourcing .bashrc at dolphin startup

[Luigi Keith]

https://bugs.kde.org/show_bug.cgi?id=431044

--- Comment #3 from Luigi Keith <b25e1938fe at protonmail.com> ---
You can fix this without making changes to souce code by simply making your
.bashrc file as follows:

trap : SIGINT
## YOUR BASHRC CONTENT ##
trap - SIGINT

This redirects any interrup signals to null- command during the sourcing phase
and clears after sourcing has been done.

Why:
- Dolphin opens with the tabs opened in the last session.
- Dolphin parses all the paths of the tabs and starts calling directory changes
to the terminal.
- Dolphin has a failsafe feature when calling directory changes*[1]. It sends
SIGINT to terminal process before changing directory.
- This results in terminal (bash) interrupting .bashrc / .bash_profile parsing.

[1] panels/terminal/terminalpanel.cpp: TerminalPanel::sendCdToTerminal
        // The TerminalV2 interface does not provide a way to delete the
        // current line before sending a new input. This is mandatory,
        // otherwise sending a 'cd x' to a existing 'rm -rf *' might
        // result in data loss. As workaround SIGINT is sent.
        const int processId = m_terminal->terminalProcessId();
        if (processId > 0) {
            kill(processId, SIGINT);
        }

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