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PROGRAM:

NAME


nfs4_setfacl, nfs4_editfacl - manipulate NFSv4 file/directory access control lists

SYNOPSIS


nfs4_setfacl [OPTIONS] COMMAND file...
nfs4_editfacl [OPTIONS] file...

DESCRIPTION


nfs4_setfacl manipulates the NFSv4 Access Control List (ACL) of one or more files (or
directories), provided they are on a mounted NFSv4 filesystem which supports ACLs.

nfs4_editfacl is equivalent to nfs4_setfacl -e.

Refer to the nfs4_acl(5) manpage for information about NFSv4 ACL terminology and syntax.

COMMANDS
-a acl_spec [index]
add the ACEs from acl_spec to file's ACL. ACEs are inserted starting at the
indexth position (DEFAULT: 1) of file's ACL.

-A acl_file [index]
add the ACEs from the acl_spec in acl_file to file's ACL. ACEs are inserted
starting at the indexth position (DEFAULT: 1) of file's ACL.

-x acl_spec | index
delete ACEs matched from acl_spec - or delete the indexth ACE - from file's ACL.
Note that the ordering of the ACEs in acl_spec does not matter.

-X acl_file
delete ACEs matched from the acl_spec in acl_file from file's ACL. Note that the
ordering of the ACEs in the acl_spec does not matter.

-s acl_spec
set file's ACL to acl_spec.

-S acl_file
set file's ACL to the acl_spec in acl_file.

-e, --edit
edit file's ACL in the editor defined in the EDITOR environment variable (DEFAULT:
vi(1)) and set the resulting ACL upon a clean exit, assuming changes made in the
editor were saved. Note that if multiple files are specified, the editor will be
serially invoked once per file.

-m from_ace to_ace
modify file's ACL in-place by replacing from_ace with to_ace.

-?, -h, --help
display help text and exit.

--version
display this program's version and exit.

NOTE: if '-' is given as the acl_file with the -A/-X/-S flags, the acl_spec will be read
from stdin.

OPTIONS
-R, --recursive
recursively apply to a directory's files and subdirectories. Similar to
setfacl(1), the default behavior is to follow symlinks given on the command line
and to skip symlinks encountered while recursing through directories.

-L, --logical
in conjunction with -R/--recursive, a logical walk follows all symbolic links.

-P, --physical
in conjunction with -R/--recursive, a physical walk skips all symbolic links.

--test
display results of COMMAND, but do not save changes.

PERMISSIONS ALIASES


With nfs4_setfacl, one can use simple abbreviations ("aliases") to express generic "read"
(R), generic "write" (W), and generic "execute" (X) permissions, familiar from the POSIX
mode bits used by, e.g., chmod(1). To use these aliases, one can put them in the
permissions field of an NFSv4 ACE and nfs4_setfacl will convert them: an R is expanded to
rntcy, a W is expanded to watTNcCy (with D added to directory ACEs), and an X is expanded
to xtcy. Please refer to the nfs4_acl(5) manpage for information on specific NFSv4 ACE
permissions.

For example, if one wanted to grant generic "read" and "write" access on a file, the NFSv4
permissions field would normally contain something like rwatTnNcCy. Instead, one might
use aliases to accomplish the same goal with RW.

The two permissions not included in any of the aliases are d (delete) and o (write-owner).
However, they can still be used: e.g., a permissions field consisting of Wdo expresses
generic "write" access as well as the ability to delete and change ownership.

EXAMPLES


Assume that the file `foo' has the following NFSv4 ACL for the following examples:

A::OWNER@:rwatTnNcCy
D::OWNER@:x
A:g:GROUP@:rtncy
D:g:GROUP@:waxTC
A::EVERYONE@:rtncy
D::EVERYONE@:waxTC

- add ACE granting `[email protected]' generic "read" and "execute" access (defaults to
prepending ACE to ACL):
$ nfs4_setfacl -a A::[email protected]:rxtncy foo

- add the same ACE as above, but using aliases:
$ nfs4_setfacl -a A::[email protected]:RX foo

- edit existing ACL in a text editor and set modified ACL on clean save/exit:
$ nfs4_setfacl -e foo

- set ACL (overwrites original) to contents of a spec_file named `newacl.txt':
$ nfs4_setfacl -S newacl.txt foo

- recursively set the ACLs of all files and subdirectories in the current directory,
skipping all symlinks encountered, to the ACL contained in the spec_file named
`newacl.txt':
$ nfs4_setfacl -R -P -S newacl.txt *

- delete the first ACE, but only print the resulting ACL (does not save changes):
$ nfs4_setfacl --test -x 1 foo

- delete the last two ACEs above:
$ nfs4_setfacl -x "A::EVERYONE@rtncy, D::EVERYONE@:waxTC" foo

- modify (in-place) the second ACE above:
$ nfs4_setfacl -m D::OWNER@:x D::OWNER@:xo foo

- set ACLs of `bar' and `frobaz' to ACL of `foo':
$ nfs4_getfacl foo | nfs4_setfacl -S - bar frobaz

AUTHORS


nfs4_setfacl was written by people at CITI, the Center for Information Technology
Integration (http://www.citi.umich.edu). This manpage was written by David Richter.

CONTACT


Please send bug reports, feature requests, and comments to <[email protected]>.

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