check-merged-usr.sh 1.2 KB

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  1. #!/bin/sh
  2. #
  3. # Check if a given custom skeleton or overlay complies to the merged /usr
  4. # requirements:
  5. # /
  6. # /bin -> usr/bin
  7. # /lib -> usr/lib
  8. # /sbin -> usr/sbin
  9. # /usr/bin/
  10. # /usr/lib/
  11. # /usr/sbin/
  12. #
  13. # Output: the list of non-compliant paths (empty if compliant).
  14. #
  15. # Extract the inode numbers for all of those directories. In case any is
  16. # a symlink, we want to get the inode of the pointed-to directory, so we
  17. # append '/.' to be sure we get the target directory. Since the symlinks
  18. # can be anyway (/bin -> /usr/bin or /usr/bin -> /bin), we do that for
  19. # all of them.
  20. #
  21. lib_inode=$(stat -c '%i' "${1}/lib/." 2>/dev/null)
  22. bin_inode=$(stat -c '%i' "${1}/bin/." 2>/dev/null)
  23. sbin_inode=$(stat -c '%i' "${1}/sbin/." 2>/dev/null)
  24. usr_lib_inode=$(stat -c '%i' "${1}/usr/lib/." 2>/dev/null)
  25. usr_bin_inode=$(stat -c '%i' "${1}/usr/bin/." 2>/dev/null)
  26. usr_sbin_inode=$(stat -c '%i' "${1}/usr/sbin/." 2>/dev/null)
  27. not_merged_dirs=""
  28. test -z "$lib_inode" || \
  29. test "$lib_inode" = "$usr_lib_inode" || \
  30. not_merged_dirs="/lib"
  31. test -z "$bin_inode" || \
  32. test "$bin_inode" = "$usr_bin_inode" || \
  33. not_merged_dirs="$not_merged_dirs /bin"
  34. test -z "$sbin_inode" || \
  35. test "$sbin_inode" = "$usr_sbin_inode" || \
  36. not_merged_dirs="$not_merged_dirs /sbin"
  37. echo "${not_merged_dirs# }"