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FreeBSD 11.0 - man page for acl_dup (freebsd section 3)

ACL_DUP(3)						   BSD Library Functions Manual 						ACL_DUP(3)

NAME
acl_dup -- duplicate an ACL
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <sys/types.h> #include <sys/acl.h> acl_t acl_dup(acl_t acl);
DESCRIPTION
The acl_dup() function returns a pointer to a copy of the ACL pointed to by the argument 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 as an argument. Any existing ACL pointers that refer to the ACL referred to by acl shall continue to refer to the ACL.
IMPLEMENTATION NOTES
FreeBSD's support for POSIX.1e interfaces and features is still under development at this time.
RETURN VALUES
Upon successful completion, this function shall return a pointer to the duplicate ACL. Otherwise, a value of (acl_t)NULL shall be returned, and errno shall be set to indicate the error.
ERRORS
If any of the following conditions occur, the acl_init() function shall return a value of (acl_t)NULL and set errno to the corresponding value: [EINVAL] Argument acl does not point to a valid ACL. [ENOMEM] The acl_t to be returned requires more memory than is allowed by the hardware or system-imposed memory management con- straints.
SEE ALSO
acl(3), acl_free(3), acl_get(3), posix1e(3)
STANDARDS
POSIX.1e is described in IEEE POSIX.1e draft 17. Discussion of the draft continues on the cross-platform POSIX.1e implementation mailing list. To join this list, see the FreeBSD POSIX.1e implementation page for more information.
HISTORY
POSIX.1e support was introduced in FreeBSD 4.0, and development continues.
AUTHORS
Robert N M Watson
BSD
January 28, 2000 BSD