patchGNU Core Utilities - Patches: patch #4065, df emits spurious errors


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patch #4065: df emits spurious errors

Submitted by:  None
Submitted on:  Tue 31 May 2005 04:33:05 PM UTC  
Category:  None Priority:  5 - Normal
Status:  None Privacy:  Public
Assigned to:  None Originator Email:  -email is unavailable-
Open/Closed:  Open

Tue 31 May 2005 04:33:05 PM UTC, original submission:  

If the caller specifies a FILE, df will generate permission errors concerning other filesystems even though the caller has permission to stat() FILE.  The problem occurs if you specify a FILE without a leading '/' or if FILE resides in a lofs filesystem.  Example: > gnu df -k | egrep 'Filesystem|/tmp'
Filesystem           1K-blocks      Used Available Use% Mounted on
swap                  20055024       436  20054588   1% /tmp > gnu df -k .
Filesystem           1K-blocks      Used Available Use% Mounted on
df: `/fs/cache-1/usr_cache/.cfs_mnt_points/
-10_i386_live-20050520_usr': Permission denied
swap                  20055188       436  20054752   1% /tmp

In this case, /fs/cache-1 is a cachefs directory and we really don't want the user to have permission to it.  The user is not asking for a report on the /fs/cache-1 filesystem so it doesn't make sense to generate errors about it.

My solution to this problem is to stash the stat() errors in a simple linked list.  If we never find the filesystem requested by the user we'll dump out the contents of the linked list; otherwise, all is well so there is no need to spew the stat() errors.  The attached patch is against release v5.2.1.  David



Attached Files
file #8913:  df.patch added by None (3KiB - application/octet-stream - df patch)


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Follow 2 latest changes.

Date Changed by Updated Field Previous Value => Replaced by
2005-05-31 None Attached File- => Added df.patch, #4676
    Carbon-Copy- => Added woodd --AT-- deshaw --DOT-- com

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