From: Thomas Wolff <towo@towo.net>
To: cygwin@cygwin.com
Subject: Re: directory without search permission is searchable?
Date: Wed, 26 Feb 2020 07:42:00 -0000 [thread overview]
Message-ID: <a3f39b7e-2d34-a649-e5c1-7dd656b96af5@towo.net> (raw)
In-Reply-To: <06DDE076-BDA6-4877-BDD3-7F670CB38DB0@kba.biglobe.ne.jp>
Am 26.02.2020 um 06:29 schrieb Jun T:
> It seems 'ls -l dir/file' or 'stat dir/file' succeeds even if
> I don't have read/search permission for the 'dir'.
>
> Create a directory and a file in it:
>
> $ mkdir tmpdir
> $ ls -ld tmpdir
> drwxr-xr-x+ 1 takimoto none 0 Feb 26 12:46 tmpdir
> $ touch tmpdir/afile
> $ ls -l tmpdir/afile
> -rw-r--r-- 1 takimoto 0 none Feb 26 12:46 tmpdir/afile
>
> Remove all permissions from tmpdir:
>
> $ chmod 0000 tmpdir
> $ ls -ld tmpdir
> d---------+ 1 takimoto none 0 Feb 26 12:46 tmpdir
> $ getfacl tmpdir
> # file: tmpdir
> # owner: takimoto
> # group: none
> user::---
> group::---
> other::---
> default:user::rwx
> default:group::r-x
> default:other::r-x
>
> This fails as expected:
>
> $ ls -l tmpdir
> ls: cannot open directory 'tmpdir': Permission denied
>
> But the followings succeed (should fail, I believe):
>
> $ ls -l tmpdir/afile
> -rw-r--r-- 1 takimoto none 0 Feb 26 12:46 tmpdir/afile
> $ stat tmpdir/afile
> File: tmpdir/afile
> Size: 0 Blocks: 0 IO Block: 65536 regular empty file
> Device: d05d00abh/3495755947d Inode: 14636698789089092 Links: 1
> Access: (0644/-rw-r--r--) Uid: (197609/takimoto) Gid: (197121/ none)
> Access: 2020-02-26 12:46:12.478966400 +0900
> Modify: 2020-02-26 12:46:12.478966400 +0900
> Change: 2020-02-26 12:46:12.464849300 +0900
> Birth: 2020-02-26 12:46:12.464849300 +0900
>
> Does this happen only for me?
To confirm, I noticed this before.
> Should I set some ACL properly?
>
> I removed default ACL from tmpdir but the results are the same.
>
> I confirmed (by a simple C code) that the stat(3p) system call
> (or library function) succeeds for 'tmpdir/afile'.
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next prev parent reply other threads:[~2020-02-26 7:42 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-26 5:30 Jun T
2020-02-26 7:42 ` Thomas Wolff [this message]
2020-02-26 10:54 ` Corinna Vinschen
2020-02-26 16:10 ` Jun-ichi Takimoto
2020-02-26 16:16 ` Corinna Vinschen
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