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acl_dup(3) — Linux manual page

ACL_DUP(3)               Library Functions ManualACL_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_tacl_dup(acl_t acl)

DESCRIPTION        top

       Theacl_dup() function returns a pointer to a copy of the ACL       pointed to byacl.       This function may cause memory to be allocated.  The caller should       free any releasable memory, when the new ACL is no longer       required, by callingacl_free(3) with the(void*)acl_t returned byacl_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)NULLis returned, anderrno       is set appropriately.

ERRORS        top

       If any of the following conditions occur, theacl_dup() function       returns a value of(acl_t)NULLand setserrno to the corresponding       value:       [EINVAL]           The argumentacl is not a valid pointer to an                          ACL.       [ENOMEM]           Theacl_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 theacl (manipulating access control lists)       project.  Information about the project can be found athttp://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 isnot part of the original manual page), send a mail to       man-pages@man7.orgLinux ACL                     March 23, 2002ACL_DUP(3)

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