The return value is the exit status of the program
as returned by the `wait' call. To get the actual
exit value divide by 256. See also the exec entry
elsewhere in this document. This is not what you
want to use to capture the output from a command,
for that you should use merely backticks or
`qx//', as described in the section on "`STRING`"
in the perlop manpage. Return value of -1 indi
cates a failure to start the program (inspect $!
for the reason).