** Description changed:
- [ Impact ]
+ [ Impact ]
When creating a partition with sgdisk, if you provide a decimal input it will
be incorrectly interpreted. For example, putting in the command
sgdisk --new=1:0:+7.5G --typecode=1:8300 ./a.img to create a 7.5G partition,
the tool will actually create a 3.5K partition.
[ Test Plan ]
$ lxc launch ubuntu:jammy j
$ lxc shell j
# apt update -y && apt upgrade -y
# apt install -y gdisk
# fallocate -l 10G a.img
# sgdisk --new=1:0:+7.5G --typecode=1:8300 ./a.img
# fdisk -l ./a.img | grep filesystem | awk '{print $5}'
3.5K
(Test Fix Jammy)
# add-apt-repository ppa:mitchdz/lp2039594-gdisk-decimal
# apt install -y gdisk
# dpkg -s gdisk | grep Version:
Version: 1.0.8-4ubuntu1~jammy1
# rm ./a.img
# fallocate -l 10G a.img
# sgdisk --new=1:0:+7.5G --typecode=1:8300 ./a.img
# fdisk -l ./a.img | grep filesystem | awk '{print $5}'
7G
( Test Fix focal)
# add-apt-repository ppa:mitchdz/lp2039594-gdisk-decimal
# apt install -y gdisk
# dpkg -s gdisk | grep Version:
- Version: 1.0.5-1focal1~focal1
+ Version: 1.0.5-1ubuntu1~focal3
# rm ./a.img
# fallocate -l 10G a.img
# sgdisk --new=1:0:+7.5G --typecode=1:8300 ./a.img
# fdisk -l ./a.img | grep filesystem | awk '{print $5}'
7G
[ Where problems could occur ]
* Some tool could be used to this behavior and fixing this could cause what is
- assumed to be a regression.
+ assumed to be a regression.
* Adds a new while loop, while potentially negligible, will use more CPU
cycles.
[Original Bug Descriptio]
When using the sgdisk command to create a new partition with a specified
size, the tool behaves unexpectedly when a size is specified with a decimal
point. Specifically, using a size like 7.5G results in the partition size being
set to 3.5 KiB instead.
Steps to Reproduce:
Run the following command to create a partition:
sgdisk --new=1:0:+7.5G --typecode=1:8300 --change-name=1:boot
/dev/sda
Verify the size of the newly created partition using sgdisk --print
/dev/sda.
Expected Behavior:
The partition size should be set to 7.5 gigabytes, as specified in the --new
command.
Actual Behavior:
The partition size is set to 3.5 KiB.
Additional Information:
The issue can be worked around by specifying the size in megabytes,
such as 7500M.
System Information:
Operating System: Ubuntu 22.04.3 LTS
sgdisk Version: GPT fdisk (sgdisk) version 1.0.8
** Merge proposal linked:
https://code.launchpad.net/~mitchdz/ubuntu/+source/gdisk/+git/gdisk/+merge/471746
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https://bugs.launchpad.net/bugs/2039594
Title:
sgdisk - Unexpected Behavior with Decimal Point in Partition Size
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