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ZFS ACLS and vim

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Operating Systems Solaris ZFS ACLS and vim
# 8  
Old 03-20-2015
I'm not sure I understand your explanation of what you've done. Did you try with the LD_PRELOAD set, and found that the ACLs were preserved?

Do you have a complete truss output with "nobackup" set?
This User Gave Thanks to achenle For This Post:
akame
# 9  
Old 03-21-2015
Yes, I run a test with LD_PRELOAD set, so chmod command would not work (and it wasn't working! I tried), that preserved the ACLS when runing vim with backup mode on.

I have attached the dtrace for the run with vim + set nobackup

Code:
# ls -V 1
-rw-r--r--+  1 root     root           9 Mar 21 13:03 1
                user:lp:rwx-----------:fd-----:allow
                 owner@:rw-p--aARWcCos:-------:allow
                 group@:r-----a-R-c--s:-------:allow
              everyone@:r-----a-R-c--s:-------:allow
# cat ~/.vimrc
set nobackup
# truss -f -a -vall -l -d -o truss.out vim 1
# ls -V 1
-rw-r--r--+  1 root     root           9 Mar 21 13:03 1
                user:lp:rwx-----------:fd-----:allow
                 owner@:rw-p--aARWcCos:-------:allow
                 group@:r-----a-R-c--s:-------:allow
              everyone@:r-----a-R-c--s:-------:allow

truss.out.txt (91.2 KB) 
# 10  
Old 03-22-2015
The bug appears to be at line 4763 of fileio.c in the vim source code from Vim source archives : vim online :

Code:
#ifdef UNIX
    if (made_writable)
        perm &= ~0200;        /* reset 'w' bit for security reasons */
#endif
    if (perm >= 0)        /* set perm. of new file same as old file */
        (void)mch_setperm(wfname, perm);
#ifdef HAVE_ACL
    /* Probably need to set the ACL before changing the user (can't set the
     * ACL on a file the user doesn't own). */
    if (!backup_copy)
        mch_set_acl(wfname, acl);
#endif

The permissions are set on the file, and then ACLs are set, but only if there isn't a backup copy.

Pretty much exactly as you've found out.

The logic there escapes me.
This User Gave Thanks to achenle For This Post:
akame
# 11  
Old 03-30-2015
Thanks for you help with this.

When I have time I will folllow up with the vim guys, I think however that ZFS ACLs are not supported anyway in that vim version (I found some vague comments about it on google).

Thanks again for taking the time to look into this!

Cheers.
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