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[Bug 1808563] Re: Listing the contents of / lists QEMU_LD_PREFIX instead
From: |
Thomas Huth |
Subject: |
[Bug 1808563] Re: Listing the contents of / lists QEMU_LD_PREFIX instead |
Date: |
Tue, 20 Apr 2021 08:06:44 -0000 |
This might also be a duplicate of bug
https://bugs.launchpad.net/qemu/+bug/1813307
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https://bugs.launchpad.net/bugs/1808563
Title:
Listing the contents of / lists QEMU_LD_PREFIX instead
Status in QEMU:
Incomplete
Bug description:
Seeing this in qemu-user version 3.1.0
Demo:
$ QEMU_LD_PREFIX=$(pwd)/usr/armv7a-cros-linux-gnueabi ../run/qemu-arm
/tmp/coreutils --coreutils-prog=ls /
etc lib usr
$ ls /
boot etc lib lib64 lost+found mnt root sbin sys usr
bin dev export home lib32 net proc run tmp var
$ ls usr/armv7a-cros-linux-gnueabi
etc lib usr
In strace, the openat for "/" is remapped to the directory specified in
QEMU_LD_PREFIX:
[pid 5302] openat(AT_FDCWD, "/tmp/qemu/usr/armv7a-cros-linux-gnueabi",
O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3
As an aside, if I change the code to do chdir("/"); opendir("."); it
works fine.
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