cap_clear

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



NAME
       cap_clear,  cap_get_flag, cap_set_flag - capability data object manipu-
       lation

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  identi-
       fied 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_PERMIT-
       TED.  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 argu-
       ments 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)