Hi,
On Tue, May 01, 2012 at 09:32:20PM +0100, John Lane wrote:
Hello, this is my first post here, I hope this is the right place to ask
this question. I have also asked this on Stack Exchange but I think this
might be a more appropriate audience. I hope that's ok. I'm experencing
a problem with chroot and I am running on Arch Linux x86_64.
I have a 64 bit chroot and a 32 bit chroot. They are identical except
that one is 32 bit and one is 64 bit.
I can enter either of them using "chroot /path/to/chroot". No problems.
If I want to do that as a specific user the command is "chroot
--userspec=user:group /path/to/chroot"
This also works fine for the 64 bit chroot. However it fails for the 32
bit chroot. It fails with status 125 and the message "chroot: invalid user"
Looks like your 64-bit glibc failed to load 32-bit NSS plugins.
Please try this tentative patch:
diff --git a/src/chroot.c b/src/chroot.c
index dbb5c6d..195c43e 100644
--- a/src/chroot.c
+++ b/src/chroot.c
@@ -198,6 +198,22 @@ main (int argc, char **argv)
usage (EXIT_CANCELED);
}
+ /* We have to call parse_user_spec twice:
+ - first time outside chroot to load potentially necessary passwd/group
+ parsing plugins (e.g. NSS);
+ - second time inside chroot to do actual parsing. */
+ if (userspec)
+ {
+ uid_t uid = -1;
+ gid_t gid = -1;
+ char *user = NULL;
+ char *group = NULL;
+
+ parse_user_spec (userspec,&uid,&gid,&user,&group);
+ free (user);
+ free (group);
+ }
+
if (chroot (argv[optind]) != 0)
error (EXIT_CANCELED, errno, _("cannot change root directory to %s"),
argv[optind]);