[LTP] [PATCH v2] tst_test.c: Set system default umaks to 0022

[Wei Gao]

On Tue, Feb 20, 2024 at 10:18:37AM +0100, Petr Vorel wrote:
> Hi Wei,
> 
> >  	char *tdebug_env = getenv("LTP_ENABLE_DEBUG");
> 
> > +	umask(0022);
> 
> I don't think this is a good idea. Changing umask() in the library can influent
> tests. Could you please instead add umask(0) (to reset umask) on the tests which
> need it? The way it's done in open07.c.

cgroup_core01.c and statx07.c can use umask(0) in tests and i have updated the patch.

But chdir01 will still failed on vfat and exfat. Like following error msg:
chdir01.c:100: TFAIL: nobody: chdir("subdir") returned unexpected value -1: EACCES (13)

The reason is umask(0) should set before mount /dev/loop0 to /tmp/xxx/mntpoint, otherwise you 
have no chance modify permission of file. What's your suggestion?

susetest:/tmp/LTP_chd5JtblL/mntpoint # mount | grep loop0
/dev/loop0 on /tmp/LTP_chd5JtblL/mntpoint type vfat (rw,relatime,fmask=0077,dmask=0077,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)
/dev/loop0 on /var/tmp/LTP_chd5JtblL/mntpoint type vfat (rw,relatime,fmask=0077,dmask=0077,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)

susetest:/tmp/LTP_chd5JtblL # chmod 777 mntpoint <<<< 
susetest:/tmp/LTP_chd5JtblL # ll
total 307216
drwx------ 4 root root     16384 Dec 31  1969 mntpoint  <<<<<<<< group and other has no any permission even try chmod
-rw------- 1 root root 314572800 Feb 19 04:51 test_dev.img

susetest:/tmp/LTP_chd5JtblL/mntpoint # touch aa
susetest:/tmp/LTP_chd5JtblL/mntpoint # ll
total 16
-rwx------ 1 root root    0a
drwx------ 2 root root 8192 Feb 19 04:50 keep_out
drwx------ 2 root root 8192 Feb 19 04:50 subdir
-rwx------ 1 root root    0 Feb 19 04:50 testfile <<<<<<

Thanks.

> 
> Kind regards,
> Petr