acl_valid3
Validate an acl
Usage
#include <sys/types.h>
#include <sys/acl.h>
int
acl_valid(acl_t acl);
Library
Linux Access Control Lists library (libacl, -lacl).
Overview
The acl_valid() function checks the ACL referred to by the argument acl for validity.
The three required entries ACL_USER_OBJ, ACL_GROUP_OBJ, and ACL_OTHER must exist exactly once in the ACL. If the ACL contains any ACL_USER or ACL_GROUP entries, then an ACL_MASK entry is also required. The ACL may contain at most one ACL_MASK entry.
The user identifiers must be unique among all entries of type ACL_USER. The group identifiers must be unique among all entries of type ACL_GROUP.
Return value
The acl_valid() function returns the value 0 if successful; 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_valid() function returns -1 and sets errno to the corresponding value:
- [EINVAL]
-
The argument acl is not a valid pointer to an ACL.
The argument acl does not point to a valid ACL.
One or more of the required ACL entries is not present in acl.
The ACL contains entries that are not unique.
Releases
13 releases since Debian 3.0 (Woody); the text changed 3 times.