Thanks for replying, rich.
here are some informations i gathered. the guest is linux (centos) and i find
out the guest's file system is 'xfs' using `df -hT`:
```
$ df -hT
Filesystem Type
Size Used Avail Use% Mounted on
/dev/mapper/centos-root xfs 8.0G 1003M
7.1G 13% /
devtmpfs devtmpfs
484M 0 484M 0% /dev
tmpfs
tmpfs 496M 0 496M
0% /dev/shm
tmpfs
tmpfs 496M 6.8M 489M 2% /run
tmpfs
tmpfs 496M 0 496M
0% /sys/fs/cgroup
/dev/vda1 xfs
1014M 132M 883M 14% /boot
tmpfs
tmpfs 100M 0 100M
0% /run/user/0
```
and sgdisk version is 0.8.10:
```
$ sgdisk --version
GPT fdisk (sgdisk) version 0.8.10
```
also, i tried the command you gave. it came out the same output:
```
$ virt-rescue --ro -d 138093b9b33345c38e58efa014036bd8
><rescue> sgdisk /dev/sdb -i 1
Invalid partition data!
```
but strange things happened when i tried some other reports' suggestions:
https://listman.redhat.com/archives/libguestfs/2016-February/msg00145.html
https://listman.redhat.com/archives/libguestfs/2018-November/msg00026.html
i did these things:
1. set LIBGUESTFS_BACKEND to direct;
2. recompile the `libguestfs-1.40.2-10.el7.src.rpm` without the
`XXXX-RHEL-7-Reject-use-of-libguestfs-winsupport-features-.patch `;
3. run the `virt-rescue` command again.
```
$ virt-rescue --ro -d 138093b9b33345c38e58efa014036bd8
><rescue> sgdisk /dev/sdb -i 1
Creating new GPT entries.
Partition #1 does not exist.
```
and the command works somehow. apparently, i still dont understand what
happened indeed. and i have read about the official explanation of
LIBGUESTFS_BACKEND, is this something to do with libvirt? is it a bug or
something?
https://libguestfs.org/libguestfs-test-tool.1.html#trying-out-with-without-libvirt
------------------ Original ------------------
From: "Richard W.M. Jones";<[email protected]>;
Send time: Thursday, Mar 18, 2021 7:12 PM
To: "??????"<[email protected]>;
Cc: "libguestfs"<[email protected]>;
Subject: Re: [Libguestfs] error invalid partition data while using
libguestfs-tools
On Thu, Mar 18, 2021 at 04:10:51PM +0800, ?????? wrote:
> I'm trying to upload a file to guest os by using libguestfs api. but a
> partition error occurs during the `virt-copy-in` command. it seems its some
> problems with the `sgdisk` command, but i have no idea how to fix this. is
this
> some problems with the host os or the guest os? or maybe is the version of
> libguestfs? btw, my host os is centos 7.6 with libguestfs 1.40.
>
> ```
> $ virt-copy-in -d 138093b9b33345c38e58efa014036bd8 1.txt /root/
> libguestfs: error: inspect_os: sgdisk: Invalid partition data!
> $ cat /etc/redhat-release
> CentOS Linux release 7.6.1810 (Core)
> $ yum list installed | grep libguestfs
>
libguestfs.x86_64
1:1.40.2-10.el7
@base
> ...
> ```
>
> and after turning on LIBGUESTFS_DEBUG and LIBGUESTFS_TRACE flag, i found
out
> the error was happening which calling `guestfs_inspect_os()` function. but
i
> still dont know how to fix this. here are part of the output:
>
> ```
> ...
> calling: settle
> commandrvf: stdout=n stderr=y flags=0x0
> commandrvf: udevadm --debug settle
> calling: settle
> command: sfdisk '--print-id' '/dev/sdb' '1'
> [ 2.400992] sdb: sdb1 sdb2
> command: sfdisk returned 0
> command: sfdisk: stdout:
> 0
> commandrvf: stdout=n stderr=y flags=0x0
> commandrvf: udevadm --debug settle
> calling: settle
> commandrvf: stdout=n stderr=y flags=0x0
> commandrvf: udevadm --debug settle
> calling: settle
> command: fold-stdout-on-stderr sgdisk '/dev/sdb' '-i' '1'
> [ 2.427088] sdb: sdb1 sdb2
> command: sgdisk returned 2
> command: sgdisk: stderr:
> Invalid partition data!
The error comes from sgdisk running on the guest, so it is a bug in
sgdisk or maybe a problem with the guest filesystem itself.
The closest I can find is this report from a few years ago:
https://listman.redhat.com/archives/libguestfs/2018-May/msg00009.html
What is the guest? And what version of sgdisk are you using?
You could also try something like:
$ virt-rescue --ro -d 138093b9b33345c38e58efa014036bd8
><rescue> sgdisk /dev/sdb -i 1
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-builder quickly builds VMs from scratch
http://libguestfs.org/virt-builder.1.html
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