PR_CAPBSET_DROP - drop a capability from the calling thread's capability bounding set

NAME LIBRARY SYNOPSIS DESCRIPTION RETURN VALUE ERRORS VERSIONS STANDARDS HISTORY SEE ALSO

NAME

PR_CAPBSET_DROP − drop a capability from the calling thread’s capability bounding set

LIBRARY

Standard C library (libc, −lc)

SYNOPSIS

#include <linux/prctl.h> /* Definition of PR_* constants */
#include <sys/prctl.h>

int prctl(PR_CAPBSET_DROP, long cap);

DESCRIPTION

Drop the capability specified by cap from the calling thread’s capability bounding set. Any children of the calling thread will inherit the newly reduced bounding set.

RETURN VALUE

On success, 0 is returned. On error, −1 is returned, and errno is set to indicate the error.

ERRORS

	EINVAL		File capabilities are not enabled in the kernel.
	EINVAL		cap does not specify a valid capability.
	EPERM		The caller does not have the CAP_SETPCAP capability.

VERSIONS

A higher-level interface layered on top of this operation is provided in the libcap(3) library in the form of cap_drop_bound(3).

STANDARDS

Linux.

HISTORY

Linux 2.6.25.