redhat man page for cap_clear

CAP_CLEAR(3)						     Linux Programmer's Manual						      CAP_CLEAR(3)

NAME
       cap_clear, cap_get_flag, cap_set_flag - capability data object manipulation

SYNOPSIS
       #include <sys/capability.h>

       int cap_clear(cap_t cap_p);

       int cap_get_flag(cap_t cap_p, cap_value_t cap, cap_flag_t flag, cap_flag_value_t *value_p);

       int cap_set_flag(cap_t cap_p, cap_flag_t flag, int ncap, cap_value_t *caps, cap_flag_value_t value);

USAGE
       cc ... -lcap

DESCRIPTION
       cap_clear initializes the capability state in working storage identified by cap_p in such a way that all capability flags are cleared.

       cap_get_flag  obtains the current value of the capability flag, flag, of the capability, cap, from the capability state identified by cap_p
       and places it in the location pointed to by value_p.

       cap_set_flag sets the flag, flag, of each capability in the array caps in the capability state identified by cap_p to value.  The argument,
       ncap, is used to specify the number of capabilities in the array, caps.

       A  cap_value_t can identify any capability, such as CAP_CHOWN.  A cap_flag_t can be set to CAP_EFFECTIVE, CAP_INHERITABLE or CAP_PERMITTED.
       A cap_flag_value_t can be CAP_CLEAR (0) or CAP_SET (1).

RETURN VALUE
       cap_clear, cap_get_flag and cap_set_flag return zero on success, and -1 on failure.

       On failure, errno(3) is set to EINVAL, indicating that one of the arguments is invalid.

CONFORMING TO
       These functions are specified by POSIX.1e.

SEE ALSO
       cap_copy_ext(3), cap_from_text(3), cap_get_file(3), cap_get_proc(3), cap_init(3)

								   26th May 1997						      CAP_CLEAR(3)