[Openmcl-devel] where is shell output stored when launching an external program?

clayton stanley cstanley at cstanley.no-ip.biz
Tue Apr 17 01:00:45 UTC 2012


I am launching external processes with clozure common lisp. For better feedback/debugging, I would like to display the bash error string when I try to execute a nonexistent binary.

For example:

? (setf *t* (run-program "programDoesNotExist" '() :output t :error :output :wait nil))
#<EXTERNAL-PROCESS (programDoesNotExist)[919] (RUNNING) #x302000E6471D>

? *t*
#<EXTERNAL-PROCESS (programDoesNotExist)[919] (EXITED : 71) #x302000E6471D>

? (inspect *t*)
[0]     #<EXTERNAL-PROCESS (programDoesNotExist)[919] (EXITED : 71) #x302000E6471D>
[1]     Type: EXTERNAL-PROCESS
[2]     Class: #<STRUCTURE-CLASS EXTERNAL-PROCESS>
[3]     PID: 919
[4]     %STATUS: :EXITED
[5]     %EXIT-CODE: 71
[6]     PTY: NIL
[7]     INPUT: NIL
[8]     OUTPUT: NIL
[9]     ERROR: NIL
[10]    STATUS-HOOK: NIL
[11]    PLIST: NIL
[12]    TOKEN: (0)
[13]    CORE: NIL
[14]    ARGS: ("programDoesNotExist")
[15]    SIGNAL: #<SEMAPHORE #x302000E6483D>
[16]    COMPLETED: #<SEMAPHORE #x302000E647BD>
[17]    WATCHED-FDS: NIL
[18]    WATCHED-STREAMS: NIL
[19]    EXTERNAL-FORMAT: #<EXTERNAL-FORMAT NIL/:UNIX #x30200049FE9D>
Inspect> 

Even with the inspector, I can't find the error information printed by the shell. I'm trying to recover this string in the lisp process:

$ programDoesNotExist
-bash: programDoesNotExist: command not found

Any help would be greatly appreciated.

Thanks,
-Clayton


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