bugfindutils - Bugs: bug #15384, find misbehaves when parent...


bug #15384: find misbehaves when parent directory is not readable

Submitter:  Dmitry V. Levin <ldv>
Submitted:  Thu 05 Jan 2006 07:53:51 PM UTC
Category:  find Severity:  3 - Normal
Item Group:  Wrong result Status:  Fixed
Privacy:  Public Assigned to:  jay
Originator Name:  Open/Closed:  Closed
Release:  4.2.27 Fixed Release:  4.3.12
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Tue 04 Dec 2007 01:29:17 AM UTC, comment #5: 

This is fixed in CVS for 4.3.x, but the fix is not yet included in any release.

James Youngman <jay>
Project Administrator
Sun 02 Dec 2007 10:13:51 PM UTC, comment #4: 

A patch fixing this problem was emailed to findutils-patches@gnu.org.   It's also attached.

(file #14538)

James Youngman <jay>
Project Administrator
Wed 22 Aug 2007 06:16:18 PM UTC, comment #3: 

Actually, the failure when '.' can't be found (for example, because a parent is unsearchable) was introduced in 4.3.3; I'll open a separate report for that.

This report deals with unreadable, but searchable parents.  Indeed, fts makes a difference:

$ mkdir -p private/d
$ touch private/d/a
$ ~/findutils-4.3.8/find/find /tmp/private/d
$ chmod a-rw /tmp/private
$ ~/findutils-4.3.8/find/find /tmp/private/d
$ ~/findutils-4.3.8/find/oldfind /tmp/private/d
/home/ericb/findutils-4.3.8/find/oldfind: `/tmp/private': Permission denied

At this point, since we are about to create a stable 4.4 branch where the fts()-based find works, do we still need to worry about the home-grown oldfind, which still has the bug?

And do we go ahead and add the patch attached to this bug to the 4.3.x testsuite, when it will only pass on one of the two implementations?

Eric Blake <ericb>
Project Administrator
Wed 22 Aug 2007 05:49:19 PM UTC, comment #2: 

Revisiting this old bug, I wonder if the fts algorithm in 4.3.x matters.

Anyways, while trying to reproduce this, I did:

$ d=/tmp/.private/d
$ mkdir -p $d
$ chmod a-rx /tmp/.private
$ dirname $d
$ find --version |head -n1
GNU find version 4.3.8
$ find $d
find: `/tmp/.private/d': Permission denied
$ oldfind $d
assertion "starting_desc >= 0" failed: file "/home/eblake/findutils-4.3.8-1/src/findutils-4.3.8/find/find.c", line 201

So there's certainly still a problem.

Eric Blake <ericb>
Project Administrator
Sun 08 Jan 2006 01:36:11 PM UTC, comment #1: 

I can't immediately think of any other way to ensure that -execdir will securely succeed other than to chdir() to the parent directory.  Where the start point is a direcotry you could chdir() to that and use "." but that workaround won't be good for a plain file.

James Youngman <jay>
Project Administrator
Thu 05 Jan 2006 07:53:51 PM UTC, original submission:  

When parent directory of a given path is not readable, find refuses to work.  Here is a real world example:

$ dirname $TMPDIR
$ find $TMPDIR
find: /tmp/.private: Permission denied

Dmitry V. Levin <ldv>


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  • -email is unavailable- added by jay (Updated the item)
  • -email is unavailable- added by ericb (Posted a comment)

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    Follow 11 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2007-12-19 jay Open/ClosedOpen Closed
        Fixed ReleaseNone 4.3.12
    2007-12-04 jay StatusIn Progress Fixed
        Fixed Release4.3.2 None
    2007-12-02 jay Attached File- Added 0002-Fix-Savannah-bug-15384-find-misbehaves-when-parent.patch, #14538
        StatusNone In Progress
    2007-12-02 jay StatusFixed None
        Assigned toNone jay
    2007-08-22 ericb StatusNone Fixed
        Fixed ReleaseNone 4.3.2
    2006-01-05 ldv Attached File- Added findutils-4.2.27-alt-find-testsuite-parent.patch, #3249

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