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Diffstat (limited to 'lib/libc/sys/revoke.2')
-rw-r--r-- | lib/libc/sys/revoke.2 | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/lib/libc/sys/revoke.2 b/lib/libc/sys/revoke.2 new file mode 100644 index 0000000..57abdbb --- /dev/null +++ b/lib/libc/sys/revoke.2 @@ -0,0 +1,106 @@ +.\" Copyright (c) 1993 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" This code is derived from software contributed to Berkeley by +.\" Berkeley Software Design, Inc. +.\" +.\" 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. +.\" 4. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. +.\" +.\" @(#)revoke.2 8.1 (Berkeley) 6/4/93 +.\" $FreeBSD$ +.\" +.Dd June 4, 1993 +.Dt REVOKE 2 +.Os +.Sh NAME +.Nm revoke +.Nd revoke file access +.Sh LIBRARY +.Lb libc +.Sh SYNOPSIS +.In unistd.h +.Ft int +.Fn revoke "const char *path" +.Sh DESCRIPTION +The +.Fn revoke +system call invalidates all current open file descriptors in the system +for the file named by +.Fa path . +Subsequent operations on any such descriptors +fail, with the exceptions that a +.Fn read +from a character device file which has been revoked +returns a count of zero (end of file), +and a +.Fn close +system call will succeed. +If the file is a special file for a device which is open, +the device close function +is called as if all open references to the file had been closed. +.Pp +Access to a file may be revoked only by its owner or the super user. +The +.Fn revoke +system call is currently supported only for block and character special +device files. +It is normally used to prepare a terminal device for a new login session, +preventing any access by a previous user of the terminal. +.Sh RETURN VALUES +.Rv -std revoke +.Sh ERRORS +Access to the named file is revoked unless one of the following: +.Bl -tag -width Er +.It Bq Er ENOTDIR +A component of the path prefix is not a directory. +.It Bq Er ENAMETOOLONG +A component of a pathname exceeded 255 characters, +or an entire path name exceeded 1024 characters. +.It Bq Er ENOENT +The named file or a component of the path name does not exist. +.It Bq Er EACCES +Search permission is denied for a component of the path prefix. +.It Bq Er ELOOP +Too many symbolic links were encountered in translating the pathname. +.It Bq Er EFAULT +The +.Fa path +argument +points outside the process's allocated address space. +.It Bq Er EINVAL +The implementation does not support the +.Fn revoke +operation on the named file. +.It Bq Er EPERM +The caller is neither the owner of the file nor the super user. +.El +.Sh SEE ALSO +.Xr close 2 , +.Xr revoke 1 +.Sh HISTORY +The +.Fn revoke +system call first appeared in +.Bx 4.3 Reno . |