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NetBSD 6.1.5 - man page for revoke (netbsd section 2)

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REVOKE(2)			     BSD System Calls Manual				REVOKE(2)

NAME
     revoke -- revoke file access

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <unistd.h>

     int
     revoke(const char *path);

DESCRIPTION
     The revoke() function invalidates all current open file descriptors in the system for the
     file named by path.  Subsequent operations on any such descriptors fail, with the exceptions
     that a read(2) from a character device file which has been revoked returns a count of zero
     (end of file), and a close(2) 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.

     Access to a file may be revoked only by its owner or the super user.

     The revoke() function is normally used to prepare a terminal device for a new login session,
     preventing any access by a previous user of the terminal.

RETURN VALUES
     A 0 value indicates that the call succeeded.  A -1 return value indicates an error occurred
     and errno is set to indicate the reason.

ERRORS
     Access to the named file is revoked unless one of the following:

     [EACCES]		Search permission is denied for a component of the path prefix.

     [EFAULT]		path points outside the process's allocated address space.

     [ELOOP]		Too many symbolic links were encountered in translating the pathname.

     [ENAMETOOLONG]	A component of a pathname exceeded 255 characters, or an entire path name
			exceeded 1024 characters.

     [ENOENT]		The named file or a component of the path name does not exist.

     [ENOTDIR]		A component of the path prefix is not a directory.

     [EPERM]		The caller is neither the owner of the file nor the super user.

SEE ALSO
     close(2), dup(2), fcntl(2), flock(2), fstat(2), read(2), write(2)

HISTORY
     The revoke() function was introduced in 4.3BSD-Reno.

BSD					   July 3, 2011 				      BSD
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