NAME¶

PR_CAP_AMBIENT - read or change the ambient capability set of the calling thread

LIBRARY¶

Standard C library (libc, -lc)

SYNOPSIS¶

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

int prctl(PR_CAP_AMBIENT, long op, ...);

DESCRIPTION¶

Reads or changes the ambient capability set of the calling thread, according to the value of op, which must be one of the following:

PR_CAP_AMBIENT_RAISE

PR_CAP_AMBIENT_LOWER

PR_CAP_AMBIENT_IS_SET

PR_CAP_AMBIENT_CLEAR_ALL

RETURN VALUE¶

On success, a nonnegative value is returned. On error, -1 is returned, and errno is set to indicate the error.

ERRORS¶

EINVAL

op is not a valid value.

VERSIONS¶

Higher-level interfaces layered on top of the above operations are provided in the libcap(3) library in the form of cap_get_ambient(3), cap_set_ambient(3), and cap_reset_ambient(3).

STANDARDS¶

Linux.

HISTORY¶

Linux 4.3.

SEE ALSO¶

prctl(2), PR_CAP_AMBIENT_RAISE(2const), PR_CAP_AMBIENT_LOWER(2const), PR_CAP_AMBIENT_IS_SET(2const), PR_CAP_AMBIENT_CLEAR_ALL(2const), libcap(3), cap_get_ambient(3), cap_set_ambient(3), cap_reset_ambient(3)