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
107 lines
3.6 KiB
Groff
107 lines
3.6 KiB
Groff
.\" $NetBSD: revoke.2,v 1.12 2003/08/07 16:44:05 agc Exp $
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.\"
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.\" Copyright (c) 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" Berkeley Software Design, Inc.
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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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.\" @(#)revoke.2 8.1 (Berkeley) 6/4/93
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.\"
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.Dd March 22, 1999
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.Dt REVOKE 2
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.Os
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.Sh NAME
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.Nm revoke
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.Nd revoke file access
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In unistd.h
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.Ft int
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.Fn revoke "const char *path"
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.Sh DESCRIPTION
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The
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.Nm revoke
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function invalidates all current open file descriptors in the system
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for the file named by
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.Fa path .
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Subsequent operations on any such descriptors
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fail, with the exceptions that a
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.Fn read
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from a character device file which has been revoked
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returns a count of zero (end of file),
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and a
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.Fn close
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call will succeed.
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If the file is a special file for a device which is open,
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the device close function
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is called as if all open references to the file had been closed.
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.Pp
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Access to a file may be revoked only by its owner or the super user.
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.Pp
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.Nm revoke
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is normally used to prepare a terminal device for a new login session,
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preventing any access by a previous user of the terminal.
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.Sh RETURN VALUES
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A 0 value indicates that the call succeeded.
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A \-1 return value indicates an error occurred and
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.Va errno
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is set to indicate the reason.
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.Sh ERRORS
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Access to the named file is revoked unless one of the following:
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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 255 characters,
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or an entire path name exceeded 1024 characters.
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.It Bq Er ENOENT
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The named file or a component of the path name 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 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 EPERM
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The caller is neither the owner of the file nor the super user.
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.El
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.Sh SEE ALSO
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.Xr close 2 ,
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.Xr dup 2 ,
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.Xr fcntl 2 ,
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.Xr flock 2 ,
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.Xr fstat 2 ,
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.Xr read 2 ,
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.Xr write 2
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.Sh HISTORY
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The
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.Nm revoke
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function was introduced in
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.Bx 4.3 Reno .
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