1.\" Copyright (c) 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" Berkeley Software Design, Inc. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 3. Neither the name of the University nor the names of its contributors 16.\" may be used to endorse or promote products derived from this software 17.\" without specific prior written permission. 18.\" 19.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29.\" SUCH DAMAGE. 30.\" 31.\" @(#)revoke.2 8.1 (Berkeley) 6/4/93 32.\" $FreeBSD: src/lib/libc/sys/revoke.2,v 1.7.2.3 2001/12/14 18:34:01 ru Exp $ 33.\" $DragonFly: src/lib/libc/sys/revoke.2,v 1.2 2003/06/17 04:26:47 dillon Exp $ 34.\" 35.Dd November 4, 2015 36.Dt REVOKE 2 37.Os 38.Sh NAME 39.Nm revoke 40.Nd revoke file access 41.Sh LIBRARY 42.Lb libc 43.Sh SYNOPSIS 44.In unistd.h 45.Ft int 46.Fn revoke "const char *path" 47.Sh DESCRIPTION 48The 49.Fn revoke 50function invalidates all current open file descriptors in the system 51for the file named by 52.Fa path . 53Subsequent operations on any such descriptors 54fail, with the exceptions that a 55.Fn read 56from a character device file which has been revoked 57returns a count of zero (end of file), 58and a 59.Fn close 60call will succeed. 61If the file is a special file for a device which is open, 62the device close function 63is called as if all open references to the file had been closed. 64.Pp 65Access to a file may be revoked only by its owner or the super user. 66Root, 67jail root, 68and chrooted directories cannot be revoked. 69It is normally used to prepare a terminal device for a new login session, 70preventing any access by a previous user of the terminal. 71.Sh RETURN VALUES 72.Rv -std revoke 73.Sh ERRORS 74Access to the named file is revoked unless one of the following: 75.Bl -tag -width Er 76.It Bq Er ENOTDIR 77A component of the path prefix is not a directory. 78.It Bq Er ENAMETOOLONG 79A component of a pathname exceeded 255 characters, 80or an entire path name exceeded 1024 characters. 81.It Bq Er ENOENT 82The named file or a component of the path name does not exist. 83.It Bq Er EACCES 84Search permission is denied for a component of the path prefix. 85.It Bq Er ELOOP 86Too many symbolic links were encountered in translating the pathname. 87.It Bq Er EFAULT 88.Fa Path 89points outside the process's allocated address space. 90.It Bq Er EPERM 91The caller is neither the owner of the file nor the super user. 92.El 93.Sh SEE ALSO 94.Xr close 2 95.Sh HISTORY 96The 97.Fn revoke 98function was introduced in 99.Bx 4.3 Reno . 100