eval and chroot strange behavior

recsky has asked for the wisdom of the Perl Monks concerning the following question:

Hi , I was writing a script and the -X file tests start to fail after some point. After search, they start to fail after this:

my @list = eval {chroot $config{root}; chdir "/"; qx / ldd $my_bin / }
+;
[download]

In true the problem is the chroot, but I suppose that inside eval it not propagate in the rest program. Some tip or sugestion? Running at v5.8.8.

Comment on eval and chroot strange behavior Download Code

Replies are listed 'Best First'.
Re: eval and chroot strange behavior by pc88mxer (Vicar) on Apr 02, 2008 at 06:13 UTC
In true the problem is the chroot, but I suppose that inside eval it not propagate in the rest program. This is not the case. `eval` doesn't preserve your process's root directory. So if you change it with `chroot`, it remains changed until you change it again. One way you might be able to accomplish what you want to do is to execute your code in a child process and communicate the result back to the parent.	[reply] [d/l] [select]
Re^2: eval and chroot strange behavior by mattk (Pilgrim) on Apr 02, 2008 at 11:41 UTC
As above, and this is how you fix it: `my @list = qx{chroot $config{root} ldd $my_bin/};`	[reply] [d/l]