Re: [PATCH] kill: fix signal number to name lookup on AIX

[Michael Felt]

On 27/07/2017 10:22, Michael Felt wrote:
> Hint: I expect the issue here is that the ln is done on a NFS server 
> rather than "local" filesystem.
>
> Also, not run (here) as root, so those tests were skipped here.
>
> ========================================================
>    GNU coreutils 8.27.4-3c9d7: ./tests/test-suite.log
> ========================================================
>
> # TOTAL: 592
> # PASS:  414
> # SKIP:  177
> # XFAIL: 0
> # FAIL:  1
> # XPASS: 0
> # ERROR: 0
>
> from ./tests/test-suite.log
>
> FAIL: tests/ln/sf-1
> =================== 

Ok, it looks like the test above above succeeds when on jfs2.

Running as root - a test previously skipped now fails. And it is a real 
bug, it seems, as the AIX cp command (/usr/bin/cp) works as expected.

Look at the commands used to create the c4 and c8 files (the directory 
was given mode 777 to permit the writing regardless of userid.


michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]touch c
michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]chmod a=r,ug+sx c
michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]ls -l c
-r-sr-sr-- 1 michael felt 0 Jul 27 16:53 c
michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]su
root's Password:
michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]cp -p c c1
michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]chroot --skip-chdir 
--user=nobody src/cp -p c c2
chroot: option --skip-chdir only permitted if NEWROOT is old '/'
Try 'chroot --help' for more information.
michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]chroot --skip-chdir 
--user=nobody / src/cp -p c c2
cp: cannot create regular file 'c2': Permission denied
michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]ls -l c c??
ls: cannot access 'c??': No such file or directory
-r-sr-sr-- 1 michael felt 0 Jul 27 16:53 c
michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]ls -l c c?
-r-sr-sr-- 1 michael felt 0 Jul 27 16:53 c
-r-sr-sr-- 1 michael felt 0 Jul 27 16:53 c1
michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]chmod 777 .
michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]chroot --skip-chdir 
--user=nobody / src/cp -p c c2
michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]ls -l c c?
-r-sr-sr-- 1 michael felt 0 Jul 27 16:53 c
-r-sr-sr-- 1 michael felt 0 Jul 27 16:53 c1
-r-sr-sr-- 1 nobody  felt 0 Jul 27 16:53 c2
michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]su nobody -c src/cp 
-p c c3
michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]ls -l c c?
-r-sr-sr-- 1 michael felt 0 Jul 27 16:53 c
-r-sr-sr-- 1 michael felt 0 Jul 27 16:53 c1
-r-sr-sr-- 1 nobody  felt 0 Jul 27 16:53 c2
-r-sr-sr-- 1 nobody  felt 0 Jul 27 16:53 c3
michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]su nobody -c 
/usr/bin/cp -p c c4
michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]ls -l c c?
-r-sr-sr-- 1 michael felt 0 Jul 27 16:53 c
-r-sr-sr-- 1 michael felt 0 Jul 27 16:53 c1
-r-sr-sr-- 1 nobody  felt 0 Jul 27 16:53 c2
-r-sr-sr-- 1 nobody  felt 0 Jul 27 16:53 c3
-r-xr-xr-- 1 nobody  felt 0 Jul 27 16:53 c4
michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]

Here I exit from SU mode.

As the file c is owned by michael - not surprising that c5 has 
permission bits. But c2 is owned by nobody, and I would not expect those 
special bits to copy as michael

michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]id
uid=199(michael) gid=1954(felt) 
groups=1954(felt),1(staff),33(httpd),208(xdata)
michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]cp -p c c5
michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]src/cp -p c c6
michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]ls -l c c?
-r-sr-sr-- 1 michael felt 0 Jul 27 16:53 c
-r-sr-sr-- 1 michael felt 0 Jul 27 16:53 c1
-r-sr-sr-- 1 nobody  felt 0 Jul 27 16:53 c2
-r-sr-sr-- 1 nobody  felt 0 Jul 27 16:53 c3
-r-xr-xr-- 1 nobody  felt 0 Jul 27 16:53 c4
-r-sr-sr-- 1 michael felt 0 Jul 27 16:53 c5
-r-sr-sr-- 1 michael felt 0 Jul 27 16:53 c6
michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]src/cp -p c2 c6
cp: cannot create regular file 'c6': Permission denied
michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]src/cp -p c2 c7
michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]ls -l c c?
-r-sr-sr-- 1 michael felt 0 Jul 27 16:53 c
-r-sr-sr-- 1 michael felt 0 Jul 27 16:53 c1
-r-sr-sr-- 1 nobody  felt 0 Jul 27 16:53 c2
-r-sr-sr-- 1 nobody  felt 0 Jul 27 16:53 c3
-r-xr-xr-- 1 nobody  felt 0 Jul 27 16:53 c4
-r-sr-sr-- 1 michael felt 0 Jul 27 16:53 c5
-r-sr-sr-- 1 michael felt 0 Jul 27 16:53 c6
-r-sr-sr-- 1 michael felt 0 Jul 27 16:53 c7
michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]/usr/bin/cp -p c2 c8
michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]ls -l c c?
-r-sr-sr-- 1 michael felt 0 Jul 27 16:53 c
-r-sr-sr-- 1 michael felt 0 Jul 27 16:53 c1
-r-sr-sr-- 1 nobody  felt 0 Jul 27 16:53 c2
-r-sr-sr-- 1 nobody  felt 0 Jul 27 16:53 c3
-r-xr-xr-- 1 nobody  felt 0 Jul 27 16:53 c4
-r-sr-sr-- 1 michael felt 0 Jul 27 16:53 c5
-r-sr-sr-- 1 michael felt 0 Jul 27 16:53 c6
-r-sr-sr-- 1 michael felt 0 Jul 27 16:53 c7
-r-xr-xr-- 1 michael felt 0 Jul 27 16:53 c8
michael@x071:[/home/michael/coreutils-8.27.4-3c9d7]

So, it seems that src/cp is still copying the file mode, regardless.