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

NAME
       cap_clear,  cap_clear_flag,  cap_compare,  cap_copy_ext,	 cap_copy_int,
       cap_free,  cap_from_name,  cap_from_text,   cap_get_fd,	 cap_get_file,
       cap_get_flag,   cap_get_pid,  cap_get_proc,  cap_set_fd,	 cap_set_file,
       cap_set_flag,   cap_set_proc,   cap_size,   cap_to_name,	  cap_to_text,
       cap_get_pid, cap_dup - capability data object manipulation

SYNOPSIS
       #include	<sys/capability.h>

       int cap_clear(cap_t cap_p);

       int cap_clear_flag(cap_t	cap_p, cap_flag_t flag);

       int cap_compare(cap_t cap_a, cap_t cap_b);

       ssize_t cap_copy_ext(void *ext_p, cap_t cap_p, ssize_t size);

       cap_t cap_copy_int(const	void *ext_p);

       int cap_free(void *obj_d);

       int cap_from_name(const char *name, cap_value_t *cap_p);

       cap_t cap_from_text(const char *buf_p);

       cap_t cap_get_fd(int fd);

       cap_t cap_get_file(const	char *path_p);

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

       #include	<sys/types.h>
       cap_t cap_get_pid(pid_t pid);

       cap_t cap_get_proc(void);

       int cap_set_fd(int fd, cap_t caps);

       int cap_set_file(const char *path_p, cap_t cap_p);

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

       ssize_t cap_size(cap_t cap_p);

       char *cap_to_name(cap_value_t cap);

       char *cap_to_text(cap_t caps, ssize_t *length_p);

       cap_t cap_get_pid(pid_t pid);

       cap_t cap_dup(cap_t cap_p);

       Link with -lcap.

DESCRIPTION
       These  functions	work on	a capability state held	in working storage.  A
       cap_t holds information about the capabilities in  each	of  the	 three
       sets,  Permitted, Inheritable, and Effective.  Each capability in a set
       may be clear (disabled, 0) or set (enabled, 1).

       These functions work with the following data types:

       cap_value_t	 identifies a capability, such as CAP_CHOWN.

       cap_flag_t	 identifies one	of the three flags associated  with  a
			 capability  (i.e., it identifies one of the three ca-
			 pability sets).   Valid  values  for  this  type  are
			 CAP_EFFECTIVE,	CAP_INHERITABLE	or CAP_PERMITTED.

       cap_flag_value_t	 identifies  the  setting  of  a particular capability
			 flag (i.e, the	value  of  a  capability  in  a	 set).
			 Valid	values	for  this  type	 are  CAP_CLEAR(0)  or
			 CAP_SET(1).

RETURN VALUE
       The return value	is  generally  specific	 to  the  individual  function
       called.	On failure, errno is set appropriately.

CONFORMING TO
       These  functions	are as per the withdrawn POSIX.1e draft	specification.
       The  following  functions  are  Linux   extensions:   cap_clear_flag(),
       cap_compare(), cap_from_name(), cap_to_name(), and cap_compare().

SEE ALSO
       cap_clear(3),   cap_copy_ext(3),	  cap_from_text(3),   cap_get_file(3),
       cap_get_proc(3),	cap_init(3), capabilities(7), getpid(2)	capsh(1)

				  2008-07-29			     LIBCAP(3)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | CONFORMING TO | SEE ALSO

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