[Gllug] show non-zero exit code in bash

[salsaman]

salsaman wrote:

> Russell Howe wrote:
>
>> On Sat, Dec 24, 2005 at 11:43:20AM +0000, Dean Wilson wrote:
>>  
>>
>>> On Fri, Dec 23, 2005 at 03:07:01PM +0000, Russell Howe wrote:
>>>   
>>>
>>>>> I have shell envy. One of my co-workers uses zsh and has a nifty 
>>>>> feature
>>>>> that shows you the exit code of any command that doesn't return a 0.
>>>>>       
>>>>
>>>> You need to track state. Something like this:
>>>> PROMPT_COMMAND='ret=$?; if [ "x$SHOWNRETCODE" != "xyes" -a "$ret" 
>>>> -ne "0" ];then echo exit code: $ret; SHOWNRETCODE=yes; fi'
>>>>     
>>>
>>> That's closer but it's still not right. The problem with that one is
>>> that it only shows an error code once. No matter which error code comes
>>> afterwards.
>>>   
>>
>>
>> Ugh, well I'd had a bit of wine at that point... :)
>>
>> You could use this:
>>
>> PROMPT_COMMAND='newret=$?;if [ "x$ret" != "x$newret" ]; then 
>> ret=$newret; [ "x$ret" == "x0" ] || echo latest exit code $ret; fi'
>>
>> Although it will miss the case where you run two programs in succession
>> which return the same non-zero result code...
>>
>> With zsh, I'd probably try and include it in RPROMPT, that way it
>> doesn't steal any vertical screen space...
>>
>>  
>>
> Try this then:
>
> PROMPT_COMMAND='[ "x$?" == "x0" ] || echo latest exit code $?;'
>
>
>
> Gabriel.
>
Ooops, almost got it:

PROMPT_COMMAND='ret=$?; [ "x$ret" == "x0" ] || echo latest exit code $ret;'

-- 
Gllug mailing list  -  Gllug at gllug.org.uk
http://lists.gllug.org.uk/mailman/listinfo/gllug