ACL (POSIX and NFSv4) Support over NFS shared drives on different Unix platforms Post: 302707943

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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

09-30-2012

Registered User

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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LEARN ABOUT OSF1

acl_first_entry

acl_first_entry(3)					     Library Functions Manual						acl_first_entry(3)

NAME

       acl_first_entry - Resets the current ACL entry to be the first ACL entry

LIBRARY

       Security Library (libpacl.a)

SYNOPSIS

       #include <sys/acl.h>
       int acl_first_entry(	 acl_t acl_d);

PARAMETERS

       Specifies the working storage internal representation ACL descriptor.

DESCRIPTION

       NOTE:  This function is based on Draft 13 of the POSIX P1003.6 standard.

       The  acl_first_entry()  function  sets  the  internal  ACL  entry  offset  pointer  of  the  specified  ACL  such that a subsequent call to
       acl_get_entry() for that ACL, returns the first entry in the ACL.

RETURN VALUES

       Upon successful completion, the acl_first_entry() function returns a value of 0 (zero).	Otherwise, a value of  -1  is  returned,  and  the
       errno global variable is set to indicate the error.

ERRORS

       If  any	of  the following conditions occur, the acl_first_entry() function sets errno to the corresponding value: The acl_d parameter does
       not refer to a valid ACL structure.

RELATED INFORMATION

       acl_get_entry(3), acl_copy_entry(3), acl_create_entry(3), acl_delete_entry(3), acl(4)

       Security delim off

																acl_first_entry(3)

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