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ACL_EQUIV_MODE(3) BSD Library Functions Manual ACL_EQUIV_MODE(3)
NAME
acl_equiv_mode -- check for an equivalent ACL
LIBRARY
Linux Access Control Lists library (libacl, -lacl).
SYNOPSIS
#include <sys/types.h>
#include <acl/libacl.h>
int
acl_equiv_mode(acl_t acl, mode_t *mode_p);
DESCRIPTION
The acl_equiv_mode() function checks if the ACL pointed to by the argument acl contains only
the required ACL entries of tag types ACL_USER_OBJ, ACL_GROUP_OBJ, and ACL_OTHER, and con-
tains no permissions other that ACL_READ, ACL_WRITE or ACL_EXECUTE. If the ACL has this
form, it can can be fully represented with the traditional file permission bits, and is con-
sidered equivalent with the traditional file permission bits.
If acl is an equivalent ACL and the pointer mode_p is not NULL, the value pointed to by
mode_p is set to the value that defines the same owner, group and other permissions as con-
tained in the ACL.
RETURN VALUE
On success, this function returns the value 0 if acl is an equivalent ACL, and the value 1
if acl is not an equivalent ACL. On error, the value -1 is returned, and errno is set appro-
priately.
ERRORS
If any of the following conditions occur, the acl_equiv_mode() function returns the value -1
and sets errno to the corresponding value:
[EINVAL] The argument acl is not a valid pointer to an ACL.
STANDARDS
This is a non-portable, Linux specific extension to the ACL manipulation functions defined
in IEEE Std 1003.1e draft 17 ("POSIX.1e", abandoned).
SEE ALSO
acl_from_mode(3), acl(5)
AUTHOR
Written by Andreas Gruenbacher <a.gruenbacher AT bestbits.at>.
Linux ACL March 23, 2002 Linux ACL
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