234 lines
7.1 KiB
Groff
234 lines
7.1 KiB
Groff
.\" Copyright (c) 2010 Joerg Sonnenberger
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.Dd February 21, 2010
|
|
.Dt archive_entry_acl 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm archive_entry_acl_add_entry ,
|
|
.Nm archive_entry_acl_add_entry_w ,
|
|
.Nm archive_entry_acl_clear ,
|
|
.Nm archive_entry_acl_count ,
|
|
.Nm archive_entry_acl_next ,
|
|
.Nm archive_entry_acl_next_w ,
|
|
.Nm archive_entry_acl_reset ,
|
|
.Nm archive_entry_acl_text_w
|
|
.Nd functions for manipulating Access Control Lists in archive entry descriptions
|
|
.Sh SYNOPSIS
|
|
.In archive_entry.h
|
|
.Ft void
|
|
.Fo archive_entry_acl_add_entry
|
|
.Fa "struct archive_entry *a"
|
|
.Fa "int type"
|
|
.Fa "int permset"
|
|
.Fa "int tag"
|
|
.Fa "int qualifier"
|
|
.Fa "const char *name"
|
|
.Fc
|
|
.Ft void
|
|
.Fo archive_entry_acl_add_entry_w
|
|
.Fa "struct archive_entry *a"
|
|
.Fa "int type"
|
|
.Fa "int permset"
|
|
.Fa "int tag"
|
|
.Fa "int qualifier"
|
|
.Fa "const wchar_t *name"
|
|
.Fc
|
|
.Ft void
|
|
.Fn archive_entry_acl_clear "struct archive_entry *a"
|
|
.Ft int
|
|
.Fn archive_entry_acl_count "struct archive_entry *a" "int type"
|
|
.Ft int
|
|
.Fo archive_entry_acl_next
|
|
.Fa "struct archive_entry *a"
|
|
.Fa "int type"
|
|
.Fa "int *ret_type"
|
|
.Fa "int *ret_permset"
|
|
.Fa "int *ret_tag"
|
|
.Fa "int *ret_qual"
|
|
.Fa "const char **ret_name"
|
|
.Fc
|
|
.Ft int
|
|
.Fo archive_entry_acl_next_w
|
|
.Fa "struct archive_entry *a"
|
|
.Fa "int type"
|
|
.Fa "int *ret_type"
|
|
.Fa "int *ret_permset"
|
|
.Fa "int *ret_tag"
|
|
.Fa "int *ret_qual"
|
|
.Fa "const wchar_t **ret_name"
|
|
.Fc
|
|
.Ft int
|
|
.Fn archive_entry_acl_reset "struct archive_entry *a" "int type"
|
|
.Ft const wchar_t *
|
|
.Fn archive_entry_acl_text_w "struct archive_entry *a" "int flags"
|
|
.\" enum?
|
|
.Sh DESCRIPTION
|
|
An
|
|
.Dq Access Control List
|
|
is a generalisation of the classic Unix permission system.
|
|
The ACL interface of
|
|
.Nm libarchive
|
|
is derived from the POSIX.1e draft, but restricted to simplify dealing
|
|
with practical implementations in various Operating Systems and archive formats.
|
|
.Pp
|
|
An ACL consists of a number of independent entries.
|
|
Each entry specifies the permission set as bitmask of basic permissions.
|
|
Valid permissions are:
|
|
.Bl -tag -offset indent -compact -width "ARCHIVE_ENTRY_ACL_EXECUTE"
|
|
.It Dv ARCHIVE_ENTRY_ACL_EXECUTE
|
|
.It Dv ARCHIVE_ENTRY_ACL_WRITE
|
|
.It Dv ARCHIVE_ENTRY_ACL_READ
|
|
.El
|
|
The permissions correspond to the normal Unix permissions.
|
|
.Pp
|
|
The tag specifies the principal to which the permission applies.
|
|
Valid values are:
|
|
.Bl -tag -offset indent -compact -width "ARCHIVE_ENTRY_ACL_GROUP_OBJ"
|
|
.It Dv ARCHIVE_ENTRY_ACL_USER
|
|
The user specified by the name field.
|
|
.It Dv ARCHIVE_ENTRY_ACL_USER_OBJ
|
|
The owner of the file.
|
|
.It Dv ARCHIVE_ENTRY_ACL_GROUP
|
|
The group specied by the name field.
|
|
.It Dv ARCHIVE_ENTRY_ACL_GROUP_OBJ
|
|
The group who owns the file.
|
|
.It Dv ARCHIVE_ENTRY_ACL_MASK
|
|
The maximum permissions to be obtained via group permissions.
|
|
.It Dv ARCHIVE_ENTRY_ACL_OTHER
|
|
Any principal who doesn't have a user or group entry.
|
|
.El
|
|
The principals
|
|
.Dv ARCHIVE_ENTRY_ACL_USER_OBJ ,
|
|
.Dv ARCHIVE_ENTRY_ACL_GROUP_OBJ
|
|
and
|
|
.Dv ARCHIVE_ENTRY_ACL_OTHER
|
|
are equivalent to user, group and other in the classic Unix permission
|
|
model and specify non-extended ACL entries.
|
|
.Pp
|
|
All files have an access ACL
|
|
.Pq Dv ARCHIVE_ENTRY_ACL_TYPE_ACCESS .
|
|
This specifies the permissions required for access to the file itself.
|
|
Directories have an additional ACL
|
|
.Pq Dv ARCHIVE_ENTRY_ACL_TYPE_DEFAULT ,
|
|
which controlls the initial access ACL for newly created directory entries.
|
|
.Pp
|
|
.Fn archive_entry_acl_add_entry
|
|
and
|
|
.Fn archive_entry_acl_add_entry_w
|
|
add a single ACL entry.
|
|
For the access ACL and non-extended principals, the classic Unix permissions
|
|
are updated.
|
|
.Pp
|
|
.Fn archive_entry_acl_clear
|
|
removes all ACL entries and resets the enumeration pointer.
|
|
.Pp
|
|
.Fn archive_entry_acl_count
|
|
counts the ACL entries that have the given type mask.
|
|
.Fa type
|
|
can be the bitwise-or of
|
|
.Dv ARCHIVE_ENTRY_ACL_TYPE_ACCESS
|
|
and
|
|
.Dv ARCHIVE_ENTRY_ACL_TYPE_DEFAULT .
|
|
If
|
|
.Dv ARCHIVE_ENTRY_ACL_TYPE_ACCESS
|
|
is included and at least one extended ACL entry is found,
|
|
the three non-extened ACLs are added.
|
|
.Pp
|
|
.Fn archive_entry_acl_next
|
|
and
|
|
.Fn archive_entry_acl_next_w
|
|
return the next entry of the ACL list.
|
|
This functions may only be called after
|
|
.Fn archive_entry_acl_reset
|
|
has indicated the presence of extended ACL entries.
|
|
.Pp
|
|
.Fn archive_entry_acl_reset
|
|
prepare reading the list of ACL entries with
|
|
.Fn archive_entry_acl_next
|
|
or
|
|
.Fn archive_entry_acl_next_w .
|
|
The function returns either 0, if no non-extended ACLs are found.
|
|
In this case, the access permissions should be obtained by
|
|
.Xr archive_entry_mode 3
|
|
or set using
|
|
.Xr chmod 2 .
|
|
Otherwise, the function returns the same value as
|
|
.Fn archive_entry_acl_count .
|
|
.Pp
|
|
.Fn archive_entry_acl_text_w
|
|
converts the ACL entries for the given type mask into a wide string.
|
|
In addition to the normal type flags,
|
|
.Dv ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID
|
|
and
|
|
.Dv ARCHIVE_ENTRY_ACL_STYLE_MARK_DEFAULT
|
|
can be specified to further customize the result.
|
|
The returned long string is valid until the next call to
|
|
.Fn archive_entry_acl_clear ,
|
|
.Fn archive_entry_acl_add_entry ,
|
|
.Fn archive_entry_acl_add_entry_w
|
|
or
|
|
.Fn archive_entry_acl_text_w .
|
|
.Sh RETURN VALUES
|
|
.Fn archive_entry_acl_count
|
|
and
|
|
.Fn archive_entry_acl_reset
|
|
returns the number of ACL entries that match the given type mask.
|
|
If the type mask includes
|
|
.Dv ARCHIVE_ENTRY_ACL_TYPE_ACCESS
|
|
and at least one extended ACL entry exists, the three classic Unix
|
|
permissions are counted.
|
|
.Pp
|
|
.Fn archive_entry_acl_next
|
|
and
|
|
.Fn archive_entry_acl_next_w
|
|
return
|
|
.Dv ARCHIVE_OK
|
|
on success,
|
|
.Dv ARCHIVE_EOF
|
|
if no more ACL entries exist
|
|
and
|
|
.Dv ARCHIVE_WARN
|
|
if
|
|
.Fn archive_entry_acl_reset
|
|
has not been called first.
|
|
.Pp
|
|
.Fn archive_entry_text_w
|
|
returns a wide string representation of the ACL entrise matching the
|
|
given type mask.
|
|
The returned long string is valid until the next call to
|
|
.Fn archive_entry_acl_clear ,
|
|
.Fn archive_entry_acl_add_entry ,
|
|
.Fn archive_entry_acl_add_entry_w
|
|
or
|
|
.Fn archive_entry_acl_text_w .
|
|
.Sh SEE ALSO
|
|
.Xr archive 3 ,
|
|
.Xr archive_entry 3
|
|
.Sh BUGS
|
|
.Dv ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID
|
|
and
|
|
.Dv ARCHIVE_ENTRY_ACL_STYLE_MARK_DEFAULT
|
|
are not documented.
|