acl_get_tag_type - Linux


acl_get_tag_type retrieves tag type info from ext4/ext3 filesystem using the ioctl() system call.


acl_get_tag_type [-h] [-t TYPE] [-s] [-a] [-f] device path


  • -h, --help: Display help information.
  • -t, --type: Specify the tag type to query.
  • -s, --super: Query superblock for tag type info.
  • -a, --acl: Query ACL block for tag type info.
  • -f, --force: Attempt to get tag type info even if ACL block isn’t present.


Get tag type info for a file

acl_get_tag_type -t file /dev/sda1 /path/to/file

Get tag type info from the superblock

acl_get_tag_type -s /dev/sda1

Force tag type info retrieval

acl_get_tag_type -f /dev/sda1 /path/to/file

Common Issues

  • If the ACL block is not present, the command will fail unless the -f option is used.
  • The command requires root privileges to run.


acl_get_tag_type can be used in conjunction with other tools for managing extended attributes and ACLs on ext4/ext3 filesystems. For example, it can be used to:

  • Verify the tag type of a file before setting or modifying its extended attributes.
  • Determine whether a file has an ACL block.
  • Troubleshoot ACL-related issues.

Related Commands

  • getfattr
  • setfattr
  • chattr