изменить список контроля доступа к файлу или каталогу (change the access control list of a file or directory)
Имя (Name)
chacl - change the access control list of a file or directory
Синопсис (Synopsis)
chacl acl pathname...
chacl -b acl dacl pathname...
chacl -d dacl pathname...
chacl -R pathname...
chacl -D pathname...
chacl -B pathname...
chacl -l pathname...
chacl -r pathname...
Описание (Description)
chacl is an IRIX-compatibility command, and is maintained for
those users who are familiar with its use from either XFS or
IRIX. Refer to the SEE ALSO section below for a description of
tools which conform more closely to the (withdrawn draft) POSIX
1003.1e standard which describes Access Control Lists (ACLs).
chacl changes the ACL(s) for a file or directory. The ACL(s)
specified are applied to each file in the pathname arguments.
Each ACL is a string which is interpreted using the
acl_from_text(3) routine. These strings are made up of comma
separated clauses each of which is of the form, tag:name:perm.
Where tag can be:
"user" (or "u")
indicating that the entry is a user ACL entry.
"group" (or "g")
indicating that the entry is a group ACL entry.
"other" (or "o")
indicating that the entry is an other ACL entry.
"mask" (or "m")
indicating that the entry is a mask ACL entry.
name is a string which is the user or group name for the ACL
entry. A null name in a user or group ACL entry indicates the
file's owner or file's group. perm is the string "rwx" where
each of the entries may be replaced by a "-" indicating no access
of that type, e.g. "r-x", "--x", "---".
Параметры (Options)
-b Indicates that there are two ACLs to change, the first is
the file access ACL and the second the directory default
ACL.
-d Used to set only the default ACL of a directory.
-R Removes the file access ACL only.
-D Removes directory default ACL only.
-B Remove all ACLs.
-l Lists the access ACL and possibly the default ACL
associated with the specified files or directories. This
option was added during the Linux port of XFS, and is not
IRIX compatible.
-r Set the access ACL recursively for each subtree rooted at
pathname(s). This option was also added during the Linux
port of XFS, and is not compatible with IRIX.
Примеры (Examples)
A minimum ACL:
chacl u::rwx,g::r-x,o::r-- file
The file ACL is set so that the file's owner has "rwx", the
file's group has read and execute, and others have read only
access to the file.
An ACL that is not a minimum ACL, that is, one that specifies a
user or group other than the file's owner or owner's group, must
contain a mask entry:
chacl u::rwx,g::r-x,o::r--,u:bob:r--,m::r-x file1 file2
To set the default and access ACLs on newdir to be the same as on
olddir, you could type:
chacl -b `chacl -l olddir | \
sed -e 's/.*\[//' -e 's#/# #' -e 's/]$//'` newdir
CAUTIONS
chacl can replace the existing ACL. To add or delete entries,
you must first do chacl -l to get the existing ACL, and use the
output to form the arguments to chacl.
Changing the permission bits of a file will change the file
access ACL settings (see chmod(1)). However, file creation mode
masks (see umask(1)) will not affect the access ACL settings of
files created using directory default ACLs.
ACLs are filesystem extended attributes and hence are not
typically archived or restored using the conventional archiving
utilities. See attr(5) for more information about extended
attributes and see xfsdump(8) for a method of backing them up
under XFS.
Смотри также (See also)
getfacl(1), setfacl(1), chmod(1), umask(1), acl_from_text(3),
acl(5), xfsdump(8)
