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     acl_create_entry - create a new ACL entry


     Linux Access Control Lists library (libacl, -lacl).


     #include <sys/types.h>
     #include <sys/acl.h>

     acl_create_entry(acl_t *acl_p, acl_entry_t *entry_p);


     The acl_create_entry() function creates a new ACL entry in the ACL
     pointed to by the contents of the pointer argument acl_p.  On success,
     the function returns a descriptor for the new ACL entry via entry_p.

     This function may cause memory to be allocated.  The caller should free
     any releasable memory, when the new ACL is no longer required, by calling
     acl_free(3) with (void*)*acl_p as an argument.  If the ACL working
     storage cannot be increased in the current location, then the working
     storage for the ACL pointed to by acl_p may be relocated and the previous
     working storage is released. A pointer to the new working storage is
     returned via acl_p.

     The components of the new ACL entry are initialized in the following
     ways: the ACL tag type component contains ACL_UNDEFINED_TAG, the
     qualifier component contains ACL_UNDEFINED_ID, and the set of permissions
     has no permissions enabled. Any existing ACL entry descriptors that refer
     to entries in the ACL continue to refer to those entries.


     The acl_create_entry() function returns the value 0 if successful;
     otherwise the value -1 is returned and the global variable errno is set
     to indicate the error.


     If any of the following conditions occur, the acl_create_entry() function
     returns -1 and sets errno to the corresponding value:

     [EINVAL]           The argument acl_p is not a valid pointer to an ACL.

     [ENOMEM]           The ACL working storage requires more memory than is
                        allowed by the hardware or system-imposed memory
                        management constraints.


     IEEE Std 1003.1e draft 17 (“POSIX.1e”, abandoned)


     acl_init(3), acl_delete_entry(3), acl_free(3), acl_create_entry(3),


     Derived from the FreeBSD manual pages written by Robert N M Watson
     〈〉, and adapted for Linux by Andreas Gruenbacher