** Description changed:
- 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.
+ [ 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
+ # 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.
+ * 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:
+ Run the following command to create a partition:
- sgdisk --new=1:0:+7.5G --typecode=1:8300 --change-name=1:boot
+ 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
+ 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,
+ 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
+ Operating System: Ubuntu 22.04.3 LTS
+ sgdisk Version: GPT fdisk (sgdisk) version 1.0.8
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https://bugs.launchpad.net/bugs/2039594
Title:
sgdisk - Unexpected Behavior with Decimal Point in Partition Size
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