How to know if a system command doesn't exist?
nid_oizo at yahoo.com_remove_the_
Mon Jan 12 17:15:02 CET 2004
Nicolas Fleury wrote:
> How can I know if a system command doesn't exist? All the ways I
> have tried behave like if the system command was existing but returning
> one. I don't want to sound provocative, but open in Perl returns an
> error in a command doesn't exist, so I'm sure we could have an exception
> in the same case for popen in Python?
Small correction, as far as I can see, Perl's open returns the same
error if the command returns 1 or doesn't exist. Same problem there...
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