[BUG v2017.07.0] readlink -f command broken?

[Ian Abbott]

Hi folks,

I know there were changes to do with links to directories in v2017.07.0,
but this looks like a bug in readlink with the -f option:

***@fred:/ ls -l /mnt/root
lrwxrwxrwx 7 bin -> usr/bin
drwxr-xr-x 304 boot
drwxr-xr-x 160 dev
drwxr-xr-x 1920 etc
drwxrwsr-x 160 home
lrwxrwxrwx 7 lib -> usr/lib
drwxr-xr-x 160 mnt
dr-xr-xr-x 160 proc
drwx------ 160 root
drwxr-xr-x 160 run
lrwxrwxrwx 8 sbin -> usr/sbin
drwxr-xr-x 224 srv
drwxr-xr-x 160 sys
drwxrwxrwt 160 tmp
drwxr-xr-x 480 usr
drwxr-xr-x 544 var
***@fred:/ readlink -f /mnt/root/lib libdir
***@fred:/ echo $libdir
/usr

(I expected $libdir to contain "/mnt/root/usr/lib" here, as it did in
barebox v2017.06.1.)

(Let's try it without the -f option....)

***@fred:/ readlink /mnt/root/lib libdir2
***@fred:/ echo $libdir2
usr/lib

(That is the same as barebox v2017.06.1.)

[Jean-Christophe PLAGNIOL-VILLARD]

HI,

I wrote the symlink support in barebox

But I Worte a partial support only end path file not dirs

As this is a boot loader not an OS

Best Regards,
J.

Post by Ian Abbott
Hi folks,
lrwxrwxrwx 7 bin -> usr/bin
drwxr-xr-x 304 boot
drwxr-xr-x 160 dev
drwxr-xr-x 1920 etc
drwxrwsr-x 160 home
lrwxrwxrwx 7 lib -> usr/lib
drwxr-xr-x 160 mnt
dr-xr-xr-x 160 proc
drwx------ 160 root
drwxr-xr-x 160 run
lrwxrwxrwx 8 sbin -> usr/sbin
drwxr-xr-x 224 srv
drwxr-xr-x 160 sys
drwxrwxrwt 160 tmp
drwxr-xr-x 480 usr
drwxr-xr-x 544 var
/usr
(I expected $libdir to contain "/mnt/root/usr/lib" here, as it did in barebox v2017.06.1.)
(Let's try it without the -f option....)
usr/lib
(That is the same as barebox v2017.06.1.)
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[Sascha Hauer]

Hi Ian,

Post by Ian Abbott
Hi folks,
I know there were changes to do with links to directories in v2017.07.0, but
lrwxrwxrwx 7 bin -> usr/bin
drwxr-xr-x 304 boot
drwxr-xr-x 160 dev
drwxr-xr-x 1920 etc
drwxrwsr-x 160 home
lrwxrwxrwx 7 lib -> usr/lib
drwxr-xr-x 160 mnt
dr-xr-xr-x 160 proc
drwx------ 160 root
drwxr-xr-x 160 run
lrwxrwxrwx 8 sbin -> usr/sbin
drwxr-xr-x 224 srv
drwxr-xr-x 160 sys
drwxrwxrwt 160 tmp
drwxr-xr-x 480 usr
drwxr-xr-x 544 var
/usr
(I expected $libdir to contain "/mnt/root/usr/lib" here, as it did in
barebox v2017.06.1.)
(Let's try it without the -f option....)
usr/lib
(That is the same as barebox v2017.06.1.)

I can confirm this. It's the same here. So far I was not able to find a
solution. I think readlink for directories must have been broken before
the directory link support though, since links to directories were not
supported. It may have worked in this simple case, but if multiple
levels of links were involved I don't think it could have been working
before.

Sascha