NAME¶
acl_get_perm
—
test for a permission in an ACL permission set
LIBRARY¶
Linux Access Control Lists library (libacl, -lacl).
SYNOPSIS¶
#include
<sys/types.h>
#include
<acl/libacl.h>
int
acl_get_perm
(
acl_permset_t
permset_d,
acl_perm_t
perm);
DESCRIPTION¶
The
acl_get_perm
() function tests if the
permission specified by the argument
perm is
contained in the ACL permission set pointed to by the argument
permset_d.
Any existing descriptors that refer to
permset_d continue to refer to that
permission set.
RETURN VALUE¶
If successful, the
acl_get_perm
() function
returns
1
if the permission specified by
perm is contained in the ACL permission set
permset_d, and
0
if
the permission is not contained in the permission set. Otherwise, the value
-1
is returned and the global variable
errno is set to indicate the error.
ERRORS¶
If any of the following conditions occur, the
acl_get_perm
() function returns
-1
and sets
errno to
the corresponding value:
- [
EINVAL
]
- The argument permset_d is not a valid
descriptor for a permission set within an ACL entry.
The argument perm is not a valid
acl_perm_t value.
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_add_perm(3),
acl_clear_perms(3),
acl_delete_perm(3),
acl_get_permset(3),
acl_set_permset(3),
acl(5)
AUTHOR¶
Written by
Andreas Gruenbacher
⟨a.gruenbacher@bestbits.at⟩.