2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
187 lines
5.3 KiB
Groff
187 lines
5.3 KiB
Groff
.\" $NetBSD: chflags.2,v 1.26 2010/05/31 12:16:20 njoly Exp $
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.\"
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.\" Copyright (c) 1989, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)chflags.2 8.3 (Berkeley) 5/2/95
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.\"
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.Dd May 2, 1995
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.Dt CHFLAGS 2
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.Os
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.Sh NAME
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.Nm chflags ,
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.Nm lchflags ,
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.Nm fchflags
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.Nd set file flags
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In sys/stat.h
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.In unistd.h
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.Ft int
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.Fn chflags "const char *path" "u_long flags"
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.Ft int
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.Fn lchflags "const char *path" "u_long flags"
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.Ft int
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.Fn fchflags "int fd" "u_long flags"
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.Sh DESCRIPTION
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The file whose name
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is given by
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.Fa path
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or referenced by the descriptor
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.Fa fd
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has its flags changed to
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.Fa flags .
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For
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.Fn lchflags ,
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symbolic links are not traversed and thus their modes may be changed with
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this call.
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.Pp
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The flags specified are formed by
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.Em or Ns 'ing
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the following values:
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.Pp
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.Bl -tag -width "SF_IMMUTABLE" -compact -offset indent
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.It Dv UF_NODUMP
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Do not dump the file.
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.It Dv UF_IMMUTABLE
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The file may not be changed.
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.It Dv UF_APPEND
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The file may only be appended to.
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.It Dv UF_OPAQUE
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The file (if a directory) is opaque for union mounts.
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.It Dv SF_ARCHIVED
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The file is archived.
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.It Dv SF_IMMUTABLE
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The file may not be changed.
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.It Dv SF_APPEND
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The file may only be appended to.
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.El
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.Pp
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The
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.Dv UF_NODUMP ,
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.Dv UF_IMMUTABLE ,
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.Dv UF_APPEND ,
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and
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.Dv UF_OPAQUE
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flags may be set or unset by either the owner of a file or the super-user,
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except on block and character devices, where only the super-user may set
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or unset them.
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.Pp
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The
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.Dv SF_ARCHIVED ,
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.Dv SF_IMMUTABLE ,
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and
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.Dv SF_APPEND
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flags may only be set or unset by the super-user.
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Attempts by the non-super-user to set the super-user only flags
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are silently ignored.
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These flags may be set at any time, but normally may only be unset when
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the system is in single-user mode.
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(See
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.Xr init 8
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for details.)
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.Sh RETURN VALUES
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Upon successful completion, a value of 0 is returned.
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Otherwise, \-1 is returned and the global variable
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.Va errno
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is set to indicate the error.
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.Sh ERRORS
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.Fn chflags
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will fail if:
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.Bl -tag -width Er
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.It Bq Er ENOTDIR
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A component of the path prefix is not a directory.
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.It Bq Er ENAMETOOLONG
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A component of a pathname exceeded
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.Brq Dv NAME_MAX
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characters, or an entire path name exceeded
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.Brq Dv PATH_MAX
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characters.
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.It Bq Er ENOENT
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The named file does not exist.
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.It Bq Er EACCES
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Search permission is denied for a component of the path prefix.
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.It Bq Er ELOOP
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Too many symbolic links were encountered in translating the pathname.
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.It Bq Er EPERM
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The effective user ID does not match the owner of the file and
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the effective user ID is not the super-user, or
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the effective user ID is not the super-user and one or more of the
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super-user-only flags for the named file would be changed.
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.It Bq Er EOPNOTSUPP
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The named file resides on a file system that does not support file
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flags.
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.It Bq Er EROFS
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The named file resides on a read-only file system.
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.It Bq Er EFAULT
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.Fa path
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points outside the process's allocated address space.
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.It Bq Er EIO
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An
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.Tn I/O
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error occurred while reading from or writing to the file system.
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.El
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.Pp
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.Fn fchflags
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will fail if:
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.Bl -tag -width Er
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.It Bq Er EBADF
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The descriptor is not valid.
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.It Bq Er EINVAL
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.Fa fd
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refers to a socket, not to a file.
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.It Bq Er EPERM
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The effective user ID does not match the owner of the file and
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the effective user ID is not the super-user, or
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the effective user ID is not the super-user and one or more of the
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super-user-only flags for the file would be changed.
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.It Bq Er EOPNOTSUPP
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The file resides on a file system that does not support file flags.
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.It Bq Er EROFS
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The file resides on a read-only file system.
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.It Bq Er EIO
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An
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.Tn I/O
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error occurred while reading from or writing to the file system.
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.El
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.Sh SEE ALSO
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.Xr chflags 1 ,
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.Xr stat 2 ,
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.Xr init 8 ,
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.Xr mount_union 8
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.Sh HISTORY
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The
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.Fn chflags
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and
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.Fn fchflags
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functions first appeared in
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.Bx 4.4 .
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The
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.Fn lchflags
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function first appeared in
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.Nx 1.5 .
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