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


SYNOPSIS

     int
     acl_create_entry(acl_t *acl_p, acl_entry_t *entry_p)


DESCRIPTION

     The acl_create_entry() function creates a new ACL entry in the ACL point­
     ed to by the contents of the pointer argument acl_p. Upon successful com­
     pletion, 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 stor­
     age 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 qualifi­
     er component contains ACL_UNDEFINED_ID, and the set of permissions has no
     permissions enabled. Any existing ACL entry descriptors that refer to en­
     tries in the ACL continue to refer to those entries.


RETURN VALUE

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


ERRORS

     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 al­
                   lowed by the hardware or system-imposed memory management
                   constraints.


STANDARDS

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


SEE ALSO

     acl_init(3),  acl_delete_entry(3),  acl_free(3),  acl_create_entry(3),
     acl(5)


AUTHOR

     Derived from the FreeBSD manual pages written by Robert N M Watson
     <rwatson@FreeBSD.org>, and adapted for Linux by Andreas Gruenbacher
     <a.gruenbacher@computer.org>.

 Linux ACL                      March 23, 2002                               1

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