[Libguestfs] missing chdir before chroot in guestfsd
daemon.c does just a chroot, without chdir. The result is that pwd does not
work correctly (it causes fs/dcache.c:prepend_unreachable() to add the
unreachable string). A workaround is to add "cd /" before each sh command.
<fs> mount /dev/sda2 /
<fs> sh "cd / ; chroot / ; /bin/pwd"
/
<fs> sh "/bin/pwd"
(unreachable)/
<fs> sh "cd / ; /bin/pwd"
/
This untested change may fix it.
===================
--- libguestfs-1.20.10.orig/daemon/guestfsd.c
+++ libguestfs-1.20.10/daemon/guestfsd.c
@@ -879,7 +879,11 @@ commandrvf (char **stdoutput, char **std
close (stdin_fd[PIPE_READ]);
close (stdin_fd[PIPE_WRITE]);
- if (chroot (sysroot) == -1) {
+ if (chdir (sysroot) == -1) {
+ perror ("chdir");
+ _exit (EXIT_FAILURE);
+ }
+ if (chroot (".") == -1) {
perror ("chroot");
_exit (EXIT_FAILURE);
}
Olaf