On Aug 24, 2005, at 7:42 PM, Andrew Rodland wrote:
On Wednesday 24 August 2005 04:26 pm, Amir Karger wrote:
Several people pointed out that I didn't perldoc -f system. Sorry!
Btw, even after reading the docs, I still don't understand why Perl
would pass a cd command to a piece of the shell that can't understand
it. Granted, I shouldn't do it anyway, because then Perl will exit the
shell it created for the system() and my cd will be useless.
It's not "a piece of the shell"; it's no shell at all. Perl is trying
to
execute /bin/cd (or rather, 'cd' somewhere in your search path), as
provided
for by execvp. As to why perl does it; perl doesn't know or care that
the
thing you're naming is a shell builtin; it simply tries to run what
you told
it to. If you wanted to force it to work as a builtin, you could use
system('sh', '-c', 'cd /foo'); -- but as you've already noted, it
wouldn't be
good for anything anyway.
Another way to execute a shell builtin is to append a semicolon:
system( "cd /foo;" ).
Josh
