Synopsis: on [<modes>]exec_errors [<serial#>] [-|^]<match> { <action> } Description: This hook is triggered whenever an EXECed process produces output to standard error. Parameters: $0 process number or name of the EXECed process $1- a line of the process's output to stderr Examples: To distinguish process errors from other window output: on ^exec_errors "*" { echo [$0 ERR] $1- } See Also: exec(5); on(5) exec, exec_exit, exec_prompt