man/man3sec/aclcheck.3sec

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 ACLCHECK 3SEC "Dec 10, 2001"
 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:


There must be exactly one GROUP_OBJ ACL entry.


There must be exactly one USER_OBJ ACL entry.


There must be exactly one OTHER_OBJ ACL entry.


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


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


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


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


There must be exactly one default GROUP_OBJ ACL entry.


There must be exactly one default OTHER_OBJ ACL entry.


There must be exactly one default USER_OBJ ACL entry.


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


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


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


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)