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    Command:

    cap_free

    
    
    

    SYNOPSIS

           #include <sys/capability.h>
    
           cap_t cap_init(void);
    
           int cap_free(void *obj_d);
    
           cap_t cap_dup(cap_t cap_p);
    
           Link with -lcap.
    
    
    

    DESCRIPTION

           The capabilities associated with a file or  process  are  never  edited
           directly.  Instead, working storage is allocated to contain a represen-
           tation of the capability state.  Capabilities are  edited  and  manipu-
           lated only within this working storage area.  Once editing of the capa-
           bility state is complete, the  updated  capability  state  is  used  to
           replace the capability state associated with the file or process.
    
           cap_init()  creates a capability state in working storage and returns a
           pointer to the capability state.  The initial value of  all  flags  are
           cleared.   The caller should free any releasable memory, when the capa-
           bility state in working storage  is  no  longer  required,  by  calling
           cap_free() with the cap_t as an argument.
    
           cap_free()  liberates  any releasable memory that has been allocated to
           the capability state identified by obj_d.  The obj_d argument may iden-
           tify  either  a  cap_t  entity,  or  a  char  * entity allocated by the
           cap_to_text() function.
    
           cap_dup() returns a duplicate capability state in working storage given
           by  the  source  object  cap_p,  allocating  any  memory necessary, and
           returning a pointer to the newly created capability state.  Once dupli-
           cated, no operation on either capability state affects the other in any
           way.  When the duplicated capability state in  working  storage  is  no
           longer  required, the caller should free any releasable memory by call-
           ing cap_free() with the cap_t as an argument.
    
    
    

    RETURN VALUE

           cap_init() and cap_dup() return a non-NULL value on success,  and  NULL
           on failure.
    
           cap_free() returns zero on success, and -1 on failure.
    
           On failure, errno is set to EINVAL or ENOMEM.
    
    
    

    CONFORMING TO

           These  functions are specified in the withdrawn POSIX.1e draft specifi-
           cation.
    
    
    

    SEE ALSO

           libcap(3),     cap_clear(3),     cap_copy_ext(3),     cap_from_text(3),
    
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