Hook function before a command is executed
This function is executed right before a command is executed by the shell. It’s called with three parameters which describe the command to be executed.
Usage
| 1st argument (required) | If the history mechanism is active, then this is the string the user typed. Otherwise it’s an empty string. |
| 2nd argument (required) | The size-limited, single-line value of the executed command. |
| 3rd argument (required) | Full text of the command which is going to be executed. |
Links
Examples
- Log executed commands
- Output:
1 2preexec() { echo "Command to be executed: $3" >&2; } echo hello $LOGNAME ~1 2Command to be executed: echo hello $LOGNAME hello user1
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