[Astlinux-devel] Duplicated files in ASTURW

[Ramesh GK <ram...@ho...>]

Hi,

A while back I reached out of using AstLinux as a Home Gateway Appliance. I am working on the same and observed a weird issue. I migrated the entire build system to buildroot-2017.02.11 and the packages merged between (buildroot and AstLinux) and fixed all (mostly) issues. Happy to share the code base but it is still in beta with a working firmware image as I have not tested the Asterisk components.

When I startup the firmware image and open any file in /mnt/asturo (/etc or /stat) that does not have a link to /tmp, it creates a duplicate file in /mnt/asturw. This should not pose a problem if both files are same however when the firmware image is updated. the file in /mnt/asturo is newer than the file in /mnt/asturw which became stale as it was kept back with the assumption that the file contents have changed but it was in fact the file attributes that got changed.

I could not able to find a cleaner approach and thought of checking if there is any clean way of making sure that the files do not become stale. for now I put in a temporary fix that seem to be working which checks on startup and shutdown if the files between /mnt/asturo and /mnt/asturw are same and if yes then remove the files from /mnt/asturw so they do not become stale.

/etc/init.d/misc
cleanup_asturw() {
 local dir1=/mnt/asturo
 local dir2=/mnt/asturw

 for newfile in $(find $dir2 -type f); do
   if [ -e "${newfile/${dir2}/${dir1}}" ]; then
        file=${newfile/${dir2}/${dir1}}
        if cmp -s "$file" "$newfile" ; then
#          echo "Cleaning up -> $newfile"
           rm -f $newfile
        fi
   fi
 done
}

mhtgw ~ # stat /etc/common_functions.sh
  File: /etc/common_functions.sh
  Size: 4038       Blocks: 8          IO Block: 1024   regular file
Device: 12h/18d Inode: 34824       Links: 1
Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2021-12-12 04:51:16.000000000
Modify: 2021-12-12 04:51:16.000000000
Change: 2021-12-12 20:52:40.000000000

mhtgw ~ # stat /mnt/asturo/etc/common_functions.sh
  File: /mnt/asturo/etc/common_functions.sh
  Size: 4038       Blocks: 8          IO Block: 4096   regular file
Device: ch/12d Inode: 3360        Links: 1
Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2021-12-12 04:51:16.000000000
Modify: 2021-12-12 04:51:16.000000000
Change: 2021-12-12 20:47:12.000000000

mhtgw ~ # stat /mnt/asturw/etc/common_functions.sh
  File: /mnt/asturw/etc/common_functions.sh
  Size: 4038       Blocks: 8          IO Block: 1024   regular file
Device: 802h/2050d Inode: 34824       Links: 1
Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2021-12-12 04:51:16.000000000
Modify: 2021-12-12 04:51:16.000000000
Change: 2021-12-12 20:52:40.000000000

Any thoughts or ideas are greatly appreciated

Thanks
Ramesh GK