NFS4_SETFACL(1) NFSv4 Access Control Lists NFS4_SETFACL(1)
nfs4_setfacl, nfs4_editfacl - manipulate NFSv4 file/directory access control lists
nfs4_setfacl [OPTIONS] COMMAND file...
nfs4_editfacl [OPTIONS] file...
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.
-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 start-
ing 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.
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.
set file's ACL to acl_spec.
set file's ACL to the acl_spec in acl_file.
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.
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
recursively apply to a directory's files and subdirectories. Similar to set-
facl(1), the default behavior is to follow symlinks given on the command line and
to skip symlinks encountered while recursing through directories.
in conjunction with -R/--recursive, a logical walk follows all symbolic links.
in conjunction with -R/--recursive, a physical walk skips all symbolic links.
display results of COMMAND, but do not save changes.
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 permis-
sions 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 per-
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.
Assume that the file `foo' has the following NFSv4 ACL for the following examples:
- add ACE granting `firstname.lastname@example.org' generic "read" and "execute" access (defaults to
prepending ACE to ACL):
$ nfs4_setfacl -a A::email@example.com:rxtncy foo
- add the same ACE as above, but using aliases:
$ nfs4_setfacl -a A::firstname.lastname@example.org: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, skip-
ping 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
nfs4_setfacl was written by people at CITI, the Center for Information Technology Integra-
tion (http://www.citi.umich.edu). This manpage was written by David Richter.
Please send bug reports, feature requests, and comments to <email@example.com>.
nfs4_getfacl(1), nfs4_acl(5), RFC3530 (NFSv4.0), NFSv4.1 Minor Version Draft.
Linux version 0.3.3, August 2008 NFS4_SETFACL(1)