osx man page for repair_packages

repair_packages(8)					    BSD System Manager's Manual 					repair_packages(8)

NAME
     repair_packages -- verify or repair filesystem permissions and flags for packages.

SYNOPSIS
     repair_packages [arguments]

DESCRIPTION
     repair_packages is used by Disk Utility to verify or repair permissions on installed packages.

ARGUMENTS
     --volume	   Perform all operations on the specified volume or home directory.  The root volume '/' will be used if unspecified.

     --list-standard-pkgs
		   Output the list of package-id strings corresponding to receipts in the installer's receipt database that will be verified or
		   repaired by the --standard-pkgs flag.

     --verify	   Verify the specified package(s).

     --repair	   Repair the specified package(s).

     --pkg package-id
		   Add the specified package to the list of packages to verify or repair.

     --standard-pkgs
		   Add the standard packages to the list of packages to verify or repair.  Use --list-standard-pkgs to view this list.

     --output-format #
		   Use a special output format selected by #. Different output formats may be optimized for human or machine readability. The
		   default output-format is '0', and is a verbose, human-readable format.

NOTES
     repair_packages only runs on 10.6 or later systems. To verify or repair permissions on earlier systems, reboot with a Tiger or Leopard system
     disk and verify or repair permissions with the repair_packages version on that disk.

SEE ALSO
     pkgutil(1)

     http://lists.apple.com/archives/installer-dev

BUGS
     repair_packages does not verify file contents or restore missing files; It can only verify or repair filesystem permissions.

Mac OS								   June 2, 2019 							    Mac OS