Package: fakechroot
Version: 2.5-1.1.20070227-1
Severity: normal
(again, that's a local build version, but it is based on 2.5-1.1 with
patches from other current bugs.)
The execve wrapper, correctly, expands the actual-filename argument
because the kernel needs an unfake name. It then looks for a #! line,
and if it finds one, expands the interpreter name. However, it then
re-expands actual-filename when it adds it to the constructed command
line... which is wrong on two counts:
1. It's already been expanded once already by that point
2. It shouldn't *get* expanded, since the interpreter will be calling
wrapped-open on it anyway...
Test case:
$ fakeroot fakechroot debootstrap --variant=fakechroot sarge /tmp/testroot
$ fakeroot fakechroot chroot /tmp/testroot
# cat >> /tmp/foo.sh
#!/bin/sh
echo $0
dirname "$0"
dir=`dirname "$0"`
echo `cd "$dir"; pwd`
# chmod +x /tmp/foo.sh
# /tmp/foo.sh
/tmp/testroot/tmp/foo.sh
/tmp/testroot/tmp
/tmp/testroot/tmp
# exit
(It's only the "echo $0" that matters, the test is just cooked down
from what tomcat's jasper.sh actually does.)
The fixed version, which is basically
+ const char *fake_filename = filename;
- expand_chroot_path(filename, fakechroot_path, fakechroot_ptr,
fakechroot_buf);
- newargv[n++] = filename;
+ newargv[n++] = fake_filename;
Causes the output to be
/tmp/foo.sh
/tmp
/tmp
which is (by inspection) correct.
-- System Information:
Debian Release: 3.1
Architecture: i386 (i686)
Kernel: Linux 2.6.15-mc2
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Versions of packages fakechroot depends on:
ii libc6 2.3.2.ds1-22sarge4 GNU C Library: Shared libraries an
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