parted errors printed to standard output

[billbear]

[Intrepid]
Standard error of parted goes to standard output. This makes my script to function unexpectedly.
Look at the different behavior of parted in hardy and intrepid:

intrepid: (unexpected behavior)
root@ubuntu-desktop:~# parted /dev/ramzswap0 print
错误: /dev/ramzswap0: unrecognised disk label
root@ubuntu-desktop:~# echo $?
1
root@ubuntu-desktop:~# parted /dev/ramzswap0 print 2> /dev/null
错误: /dev/ramzswap0: unrecognised disk label
root@ubuntu-desktop:~# parted /dev/ramzswap0 print > /dev/null
root@ubuntu-desktop:~#
root@ubuntu-desktop:~# parted /dev/1
错误: 无法对设备 /dev/1 - 没有该文件或目录 做 stat 操作。
重试/Retry/放弃/Cancel? c
root@ubuntu-desktop:~# parted -s /dev/1
错误: 无法对设备 /dev/1 - 没有该文件或目录 做 stat 操作。
root@ubuntu-desktop:~# echo $?
1
root@ubuntu-desktop:~# parted -s /dev/1 2> /dev/null
错误: 无法对设备 /dev/1 - 没有该文件或目录 做 stat 操作。
root@ubuntu-desktop:~# parted -s /dev/1 > /dev/null
root@ubuntu-desktop:~#

hardy: (expected behavior)
root@pt-desktop:/home/pt# parted /dev/1
错误: 无法对设备 /dev/1 - 没有该文件或目录 做 stat 操作。
重试/Retry/放弃/Cancel? c
root@pt-desktop:/home/pt# parted -s /dev/1
错误: 无法对设备 /dev/1 - 没有该文件或目录 做 stat 操作。
root@pt-desktop:/home/pt# echo $?
1
root@pt-desktop:/home/pt# parted -s /dev/1 2> /dev/null
root@pt-desktop:/home/pt# parted -s /dev/1 > /dev/null
错误: 无法对设备 /dev/1 - 没有该文件或目录 做 stat 操作。
root@pt-desktop:/home/pt#

[Michael McKinley (m-mckinley)]

I can confirm this on Jaunty, running parted 1.8.8. I've reported the bug upstream.

[Colin Watson (cjwatson)]

While this is certainly a bug (because it can cause errors to fail to be logged properly), scripts should generally look at the exit code rather than attempting to parse stdout or stderr.