NAME
revoke
- revoke file access
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
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()
from a character device file which has been revoked
returns a count of zero (end of file),
and a
close()
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.
revoke
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:
- [
ENOTDIR] -
A component of the path prefix is not a directory.
- [
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.
- [
EACCES] -
Search permission is denied for a component of the path prefix.
- [
ELOOP] -
Too many symbolic links were encountered in translating the pathname.
- [
EFAULT] -
path
points outside the process's allocated address space.
- [
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
4.3BSDReno.