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Top Forums UNIX for Dummies Questions & Answers ACL (POSIX and NFSv4) Support over NFS shared drives on different Unix platforms Post 302707943 by jim mcnamara on Sunday 30th of September 2012 01:32:10 PM
Old 09-30-2012
Last question: I know that it will work for Solaris 10/11 NFS4, per documentation. I have not tried, so I cannot comment how well it behaves.

There are problems with ACL's across platforms:
the uid has to match numerically
the gid has to match numerically
the NSF mount has to support the ACL operations, e.g., if the ACL grants write, but the remote file system is read-only then the ACL can not be honored.
See:
http://nfs.sourceforge.net/nfs-howto/ar01s06.html

If you are going across all of the platforms you mentioned - this will go beyond a nightmare to keep consistent and to maintain. On one large multiuser system ACL's are a pain in the butt. My opinion. If you can live without them do so.

I also think you are asking a hypothetical question. Even high-level IT managers know better than to have different major mission critical systems running on the number of platforms you mention. There is enough windows/UNIX/Linux chaos without adding to it.
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acltotext(3SEC) 				       File Access Control Library Functions					   acltotext(3SEC)

NAME
acltotext, aclfromtext - convert internal representation to or from external representation SYNOPSIS
cc [ flag... ] file... -lsec [ library... ] #include <sys/acl.h> char *acltotext(aclent_t *aclbufp, int aclcnt); aclent_t *aclfromtext(char *acltextp, int *aclcnt); DESCRIPTION
The acltotext() function converts an internal ACL representation pointed to by aclbufp into an external ACL representation. The space for the external text string is obtained using malloc(3C). The caller is responsible for freeing the space upon completion.. The aclfromtext() function converts an external ACL representation pointed to by acltextp into an internal ACL representation. The space for the list of ACL entries is obtained using malloc(3C). The caller is responsible for freeing the space upon completion. The aclcnt argu- ment indicates the number of ACL entries found. An external ACL representation is defined as follows: <acl_entry>[,<acl_entry>]... Each <acl_entry> contains one ACL entry. The external representation of an ACL entry contains two or three colon-separated fields. The first field contains the ACL entry tag type. The entry type keywords are defined as: user This ACL entry with no UID specified in the ACL entry ID field specifies the access granted to the owner of the object. Otherwise, this ACL entry specifies the access granted to a specific user-name or user-id number. group This ACL entry with no GID specified in the ACL entry ID field specifies the access granted to the owning group of the object. Otherwise, this ACL entry specifies the access granted to a specific group-name or group-id number. other This ACL entry specifies the access granted to any user or group that does not match any other ACL entry. mask This ACL entry specifies the maximum access granted to user or group entries. default:user This ACL entry with no uid specified in the ACL entry ID field specifies the default access granted to the owner of the object. Otherwise, this ACL entry specifies the default access granted to a specific user-name or user-ID number. default:group This ACL entry with no gid specified in the ACL entry ID field specifies the default access granted to the owning group of the object. Otherwise, this ACL entry specifies the default access granted to a specific group-name or group-ID number. default:other This ACL entry specifies the default access for other entry. default:mask This ACL entry specifies the default access for mask entry. The second field contains the ACL entry ID, as follows: uid This field specifies a user-name, or user-ID if there is no user-name associated with the user-ID number. gid This field specifies a group-name, or group-ID if there is no group-name associated with the group-ID number. empty This field is used by the user and group ACL entry types. The third field contains the following symbolic discretionary access permissions: r read permission w write permission x execute/search permission - no access RETURN VALUES
Upon successful completion, the acltotext() function returns a pointer to a text string. Otherwise, it returns NULL. Upon successful completion, the aclfromtext() function returns a pointer to a list of ACL entries. Otherwise, it returns NULL. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ |MT-Level |Unsafe | +-----------------------------+-----------------------------+ SEE ALSO
acl(2), malloc(3C), attributes(5) SunOS 5.11 10 Dec 2001 acltotext(3SEC)
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