acl_copy_int(3) — Linux manual page


ACL_COPY_INT(3)          Library Functions Manual        ACL_COPY_INT(3)

NAME         top

       acl_copy_int — copy an ACL from external to internal

LIBRARY         top

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

SYNOPSIS         top

       <sys/types.h> <sys/acl.h> acl_t acl_copy_int(const void *buf_p)

DESCRIPTION         top

       The acl_copy_int() function copies an exportable, contiguous,
       persistent form of an ACL, pointed to by buf_p, to the internal

       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 the (void*)acl_t returned
       by acl_copy_int() as an argument.

RETURN VALUE         top

       Upon success, the acl_copy_int() function returns a pointer that
       references the ACL in working storage.  On error, a value of
       (acl_t)NULL is returned, and errno is set appropriately.

ERRORS         top

       If any of the following conditions occur, the acl_copy_int()
       function returns a value of (acl_t)NULL and sets errno to the
       corresponding value:

       [EINVAL]           The buffer pointed to by the argument buf_p
                          does not contain a valid external form ACL.

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

STANDARDS         top

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

SEE ALSO         top

       acl_copy_ext(3), acl_get_entry(3), acl_free(3), acl(5)

AUTHOR         top

       Derived from the FreeBSD manual pages written by Robert N M
       Watson <>, and adapted for Linux by Andreas
       Gruenbacher <>.

COLOPHON         top

       This page is part of the acl (manipulating access control lists)
       project.  Information about the project can be found at  If you have a bug
       report for this manual page, see
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       ⟨git://⟩ on 2023-12-22.  (At that
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Linux ACL                    March 23, 2002              ACL_COPY_INT(3)