ACLCHECK(3SEC) File Access Control Library Functions ACLCHECK(3SEC)


NAME


aclcheck - check the validity of an ACL

SYNOPSIS


cc [ flag... ] file... -lsec [ library... ]
#include <sys/acl.h>

int aclcheck(aclent_t *aclbufp, int nentries, int *which);


DESCRIPTION


The aclcheck() function checks the validity of an ACL pointed to by
aclbufp. The nentries argument is the number of entries contained in the
buffer. The which parameter returns the index of the first entry that is
invalid.


The function verifies that an ACL pointed to by aclbufp is valid
according to the following rules:

o There must be exactly one GROUP_OBJ ACL entry.

o There must be exactly one USER_OBJ ACL entry.

o There must be exactly one OTHER_OBJ ACL entry.

o If there are any GROUP ACL entries, then the group ID in each
group ACL entry must be unique.

o If there are any USER ACL entries, then the user ID in each
user ACL entry must be unique.

o If there are any GROUP or USER ACL entries, then there must be
exactly one CLASS_OBJ (ACL mask) entry.

o If there are any default ACL entries, then the following
apply:

o There must be exactly one default GROUP_OBJ ACL entry.

o There must be exactly one default OTHER_OBJ ACL entry.

o There must be exactly one default USER_OBJ ACL entry.

o If there are any DEF_GROUP entries, then the group ID in
each DEF_GROUP ACL entry must be unique.

o If there are any DEF_USER entries, then the user ID in
each DEF_USER ACL entry must be unique.

o If there are any DEF_GROUP or DEF_USER entries, then there
must be exactly one DEF_CLASS_OBJ (default ACL mask)
entry.

o If any of the above rules are violated, then the function
fails with errno set to EINVAL.

RETURN VALUES


If the ACL is valid, alcheck() will return 0. Otherwise errno is set to
EINVAL and return code is set to one of the following:

GRP_ERROR
There is more than one GROUP_OBJ or DEF_GROUP_OBJ ACL
entry.


USER_ERROR
There is more than one USER_OBJ or DEF_USER_OBJ ACL
entry.


CLASS_ERROR
There is more than one CLASS_OBJ (ACL mask) or
DEF_CLASS_OBJ (default ACL mask) entry.


OTHER_ERROR
There is more than one OTHER_OBJ or DEF_OTHER_OBJ ACL
entry.


DUPLICATE_ERROR
Duplicate entries of USER, GROUP, DEF_USER, or
DEF_GROUP.


ENTRY_ERROR
The entry type is invalid.


MISS_ERROR
Missing an entry. The which parameter returns -1 in
this case.


MEM_ERROR
The system cannot allocate any memory. The which
parameter returns -1 in this case.


ATTRIBUTES


See attributes(5) for descriptions of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Evolving |
+--------------------+-----------------+
|MT-Level | Unsafe |
+--------------------+-----------------+

SEE ALSO


acl(2), aclsort(3SEC), attributes(5)


December 10, 2001 ACLCHECK(3SEC)