acl_init(3) — Linux manual page


ACL_INIT(3)           BSD Library Functions Manual           ACL_INIT(3)

NAME         top

     acl_init — initialize ACL working storage

LIBRARY         top

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

SYNOPSIS         top

     #include <sys/types.h>
     #include <sys/acl.h>

     acl_init(int count);

DESCRIPTION         top

     The acl_init() function allocates and initializes the working
     storage for an ACL of at least count ACL entries.  The ACL created
     initially contains no ACL entries.  A pointer to the working
     storage is returned.

     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_init()
     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

ERRORS         top

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

     [EINVAL]           The value of count is less than zero.

     [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_get_file(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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Linux ACL                    March 23, 2002                    Linux ACL