Reputation: 77
I need a command to be executed before shell starts to execute the user passed command,i tried using trap with DEBUG signal, but that did not happen.
I have registered trap in /etc/profile.
trap 'echo "my_command"' DEBUG
Whats happening now is:
sw0:root:root> pwd
/root
my_command
sw0:root:root>
What i want is:
sw0:root:root> pwd
my_command
/root
sw0:root:root>
Bash Version Used:
GNU bash, version 2.04.0(1)-release (powerpc-unknown-linux-gnu)
I want my command to be executed prior to every command entered by user in shell,how do i do that?
Please help me on this,i tried lot of googling but that does not help.
Upvotes: 0
Views: 241
Reputation: 1
My example
function preexec() {
echo "Preexec command"
}
trap 'preexec' DEBUG
Result is
# pwd
Preexec command
/home/robert
Upvotes: 0
Reputation: 136525
You are probably looking for something like PROMPT_COMMAND
:
The contents of this variable are executed as a regular Bash command just before Bash displays a prompt.
Upvotes: 1