df 4.5.3 returning misleading/incorrect info

[Frank 'xraz' Fricke]

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Hi!

I don't think the following behaviour is intended... if it is 

my system:

Linux xr2k 2.4.19 #2 SMP Wed Oct 30 12:11:02 CET 2002 i686
|xr2k:~# cat /proc/mounts 
|rootfs / rootfs rw 0 0
|/dev/root / ext2 rw 0 0
|proc /proc proc rw 0 0
|devpts /dev/pts devpts rw 0 0
|/dev/hda3 /win vfat rw 0 0
|/dev/hda6 /data ext3 rw 0 0
|/dev/hde2 /data/hde ext3 rw 0 0

i don't think you need more info as it seems a program-only problem.
if you however do require more i'm glad to provide it.

everything ok here:

|xr2k:~# df -m
|Filesystem           1M-blocks      Used Available Use% Mounted on
|/dev/hda1                 5946      2519      3125  45% /
|/dev/hda3                 3993      1271      2723  32% /win
|/dev/hda6                32399     28972      1807  95% /data
|/dev/hde2                28846     24129      3275  89% /data/hde



here too - shows /dev/hde2 correct while it's mounted and also /dev/hda1
for a file existing thereon.

|xr2k:~# df -m /dev/hde2
|Filesystem           1M-blocks      Used Available Use% Mounted on
|/dev/hde2                28846     24129      3275  89% /data/hde
|xr2k:~# df -m /etc/passwd
|Filesystem           1M-blocks      Used Available Use% Mounted on
|/dev/hda1                 5946      2519      3125  45% /



now if i unmount /dev/hde2:

|xr2k:~# umount /dev/hde2
|xr2k:~# df -m /dev/hde2
|Filesystem           1M-blocks      Used Available Use% Mounted on
|/dev/hde2                 5946      2519      3125  45%

it displays the values of /dev/hda1 claiming it's /dev/hde2 !

I know the manpage states "This version of df cannot show the space
available  on unmounted filesystems" but i think it would be much
better to report an error here or at least display /dev/hda1 correctly
because the devicefile in question resides on /dev/hda1.

IMO reporting nothing/an error back in such a case would be best for
one can rely on df to fail in scripts when if devices are unexpectedly
unmounted and not return values that look correct.

if address@hidden is a public mailing list - i'm not subscribed.
feel free to cc anything about this you think i should know...

   ...Frank

http://www.gnupg.org         |         http://xraz.de/gpg.key
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