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acl_dup(3) — Linux manual page

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | STANDARDS | SEE ALSO | AUTHOR | COLOPHON 

ACL_DUP(3)               Library Functions Manual              ACL_DUP(3)

NAME         top

       acl_dup — duplicate an ACL

LIBRARY         top

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

SYNOPSIS         top

       <sys/types.h> <sys/acl.h> acl_t acl_dup(acl_t acl)

DESCRIPTION         top

       The acl_dup() function returns a pointer to a copy of the ACL
       pointed to by acl.

       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_dup() as an argument.

RETURN VALUE         top

       On success, this function returns a pointer to the 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_dup() function
       returns a value of (acl_t)NULL and sets errno to the corresponding
       value:

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

       [ENOMEM]           The acl_t to be returned 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_free(3), acl_get_entry(3), acl(5)

AUTHOR         top

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

COLOPHON         top

       This page is part of the acl (manipulating access control lists)
       project.  Information about the project can be found at
       http://savannah.nongnu.org/projects/acl.  If you have a bug report
       for this manual page, see
       ⟨http://savannah.nongnu.org/bugs/?group=acl⟩.  This page was
       obtained from the project's upstream Git repository
       ⟨git://git.savannah.nongnu.org/acl.git⟩ on 2025-08-11.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2025-05-12.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there is
       a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

Linux ACL                     March 23, 2002                   ACL_DUP(3)

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