setcap — set file capabilities


setcap [-q] [-n <rootid>] [-v] {capabilities|-|-r} filename [ ... capabilitiesN fileN ]


In the absence of the -v (verify) option setcap sets the capabilities of each specified filename to the capabilities specified.  The optional -n <rootid> argument can be used to set the file capability for use only in a namespace with this rootid owner. The -v option is used to verify that the specified capabilities are currently associated with the file. If -v and -n are supplied, the -n <rootid> argument is also verified.

The capabilities are specified in the form described in cap_from_text(3).

The special capability string, '-', can be used to indicate that capabilities are read from the standard input. In such cases, the capability set is terminated with a blank line.

The special capability string, '-r', is used to remove a capability set from a file. Note, setting an empty capability set is not the same as removing it. An empty set can be used to guarantee a file is not executed with privilege inspite of the fact that the prevailing ambient+inheritable sets would otherwise bestow capabilities on executed binaries.

The -q flag is used to make the program less verbose in its output.

Exit Code

The setcap program will exit with a 0 exit code if successful. On failure, the exit code is 1.

See Also

cap_from_text(3), cap_set_file(3), getcap(8)

Referenced By

capabilities(7), capsh(1), getcap(8).

11 September 2018