On Tue, Aug 13, 2002 at 03:41:17PM -0700, Ahmed Moustafa wrote:
> I call external programs with system(). It used to return the correct
> value i.e. zero if there is no error and a non-zero value otherwise.
> Recently, it always returns -1 even if the external programs work fine.
> What could be the reason?
>From perldoc -f system:
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 "exec". 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 "`STRING`" in
perlop. Return value of -1 indicates a failure to
start the program (inspect $! for the reason).
So apparently the call to the external program is not working fine. Surely
you don't think perl is incorrect.
Michael
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