revoke - revoke file access
Standard C Library (libc, -lc)
#include <unistd.h>
int
revoke(const char *path);
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device file which has been revoked returns a count of zero (end of file),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.
A 0 value indicates that the call succeeded. A -1 return value indicates
an error occurred and errno is set to indicate the reason.
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.
close(2), dup(2), fcntl(2), flock(2), fstat(2), read(2), write(2)
The revoke function was introduced in 4.3BSD-Reno.
BSD March 22, 1999 BSD
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