extattrctl.2 revision 1.3 $NetBSD: extattrctl.2,v 1.3 2025/03/09 18:58:18 wiz Exp $
Copyright (c) 2025 The NetBSD Foundation, Inc.
All rights reserved.
This code is derived from software contributed to The NetBSD Foundation
by Christos Zoulas.
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
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documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.Dd March 9, 2025 .Dt EXTATTRCTL 2 .Os .Sh NAME .Nm extattrctl .Nd control extended attributes on a UFS1 filesystem .Sh SYNOPSIS n sys/extattr.h n ufs/ufs/extattr.h .Ft int .Fn extattrctl "const char *path" "int cmd" "const char *attrname" "int attrnamespace" "const char *filename" .Sh DESCRIPTION The .Fn extattrctl system call provides low-level control over extended attributes on a UFS1 filesystem. It allows enabling, disabling, and managing extended attributes. .Sh PARAMETERS l -tag -width indent t Fa path The path to the mount point of the filesystem. t Fa cmd The command to execute. Valid commands are: l -tag -width indent t Dv EXTATTR_CMD_ENABLE Enable a specific extended attribute. t Dv EXTATTR_CMD_DISABLE Disable a specific extended attribute. t Dv EXTATTR_CMD_START Start extended attribute support on the filesystem. t Dv EXTATTR_CMD_STOP Stop extended attribute support on the filesystem. .El t Fa attrname The name of the extended attribute (for relevant commands). t Fa attrnamespace The attribute namespace, such as .Dv EXTATTR_NAMESPACE_USER or .Dv EXTATTR_NAMESPACE_SYSTEM . t Fa filename The path to a backing file for extended attribute storage (if required by the command). .El .Sh RETURN VALUES Upon successful completion, .Fn extattrctl returns .Dv 0 . Otherwise, .Dv -1 is returned, and .Va errno is set to indicate the error. .Sh EXAMPLES Enable an attribute on a filesystem: d -literal -offset indent #include <sys/extattr.h> #include <ufs/ufs/extattr.h> if (extattrctl("/home", EXTATTR_CMD_ENABLE, "user.comment", EXTATTR_NAMESPACE_USER, NULL) == -1) err(EXIT_FAILURE, "extattrctl"); .Ed .Sh ERRORS The .Fn extattrctl system call may fail with the following errors: l -tag -width Bq -offset indent t Bq Er EACCES Permission denied. t Bq Er EINVAL Invalid arguments were provided. t Bq Er ENOENT The specified path, attribute, or file does not exist. t Bq Er ENOTSUP The filesystem does not support extended attributes. .El .Sh SEE ALSO .Xr extattr_delete_file 2 , .Xr extattr_get_file 2 , .Xr extattr_list_file 2 , .Xr extattr_set_file 2 .Sh HISTORY The .Fn extattrctl system call was imported from .Fx 5.0 in .Nx 4.0 .
Copyright (c) 2025 The NetBSD Foundation, Inc.
All rights reserved.
This code is derived from software contributed to The NetBSD Foundation
by Christos Zoulas.
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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 March 9, 2025 .Dt EXTATTRCTL 2 .Os .Sh NAME .Nm extattrctl .Nd control extended attributes on a UFS1 filesystem .Sh SYNOPSIS n sys/extattr.h n ufs/ufs/extattr.h .Ft int .Fn extattrctl "const char *path" "int cmd" "const char *attrname" "int attrnamespace" "const char *filename" .Sh DESCRIPTION The .Fn extattrctl system call provides low-level control over extended attributes on a UFS1 filesystem. It allows enabling, disabling, and managing extended attributes. .Sh PARAMETERS l -tag -width indent t Fa path The path to the mount point of the filesystem. t Fa cmd The command to execute. Valid commands are: l -tag -width indent t Dv EXTATTR_CMD_ENABLE Enable a specific extended attribute. t Dv EXTATTR_CMD_DISABLE Disable a specific extended attribute. t Dv EXTATTR_CMD_START Start extended attribute support on the filesystem. t Dv EXTATTR_CMD_STOP Stop extended attribute support on the filesystem. .El t Fa attrname The name of the extended attribute (for relevant commands). t Fa attrnamespace The attribute namespace, such as .Dv EXTATTR_NAMESPACE_USER or .Dv EXTATTR_NAMESPACE_SYSTEM . t Fa filename The path to a backing file for extended attribute storage (if required by the command). .El .Sh RETURN VALUES Upon successful completion, .Fn extattrctl returns .Dv 0 . Otherwise, .Dv -1 is returned, and .Va errno is set to indicate the error. .Sh EXAMPLES Enable an attribute on a filesystem: d -literal -offset indent #include <sys/extattr.h> #include <ufs/ufs/extattr.h> if (extattrctl("/home", EXTATTR_CMD_ENABLE, "user.comment", EXTATTR_NAMESPACE_USER, NULL) == -1) err(EXIT_FAILURE, "extattrctl"); .Ed .Sh ERRORS The .Fn extattrctl system call may fail with the following errors: l -tag -width Bq -offset indent t Bq Er EACCES Permission denied. t Bq Er EINVAL Invalid arguments were provided. t Bq Er ENOENT The specified path, attribute, or file does not exist. t Bq Er ENOTSUP The filesystem does not support extended attributes. .El .Sh SEE ALSO .Xr extattr_delete_file 2 , .Xr extattr_get_file 2 , .Xr extattr_list_file 2 , .Xr extattr_set_file 2 .Sh HISTORY The .Fn extattrctl system call was imported from .Fx 5.0 in .Nx 4.0 .
Indexes created Thu Oct 02 14:10:14 GMT 2025