The sysutils/supuner port

supuner-0.3 – SUPress stdout / stderr UNless ERror (cvsweb github mirror)

Description

supuner (SUPpress UNless ERror) executes a command and manipulates its stderr
and stdout. By default, it captures both stderr and stdout and only outputs
their combined value to stdout if the command fails. supuner is useful for
"chatty" commands whose output is only relevant if the command fails.

WWW: http://tratt.net/laurie/src/supuner/