Tcsh run command if command was run

问题

I'm not really familiar with TCSH

I would like run a command2 if a command1 was entered in the shell, something like this:

if command1  then
    echo "Command succeeded"
    command2
else
    echo "Command failed"
fi

I tried this code but it doesn't work. Step two would be to read and print in a file a part some variable that command1 changed (making a kind of history only for some variables).

回答1:

You can use $? to get exit code from last command.

#!/bin/tcsh

# command below can fail or succeed
command1

if ( $? == 0 ) then
 command2
else
 echo "command1 failed"
endif

来源：https://stackoverflow.com/questions/34457821/tcsh-run-command-if-command-was-run