MirOS Manual: revoke(2)

REVOKE(2)                  BSD Programmer's Manual                   REVOKE(2)


     revoke - revoke file access


     #include <unistd.h>

     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 dev-
     ice file which has been revoked returns a count of zero (end of file),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 dev-
     ice 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 superuser. 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.


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

                   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 ex-

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

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

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

     [EPERM]       The caller is neither the owner of the file nor the su-




     The revoke function was introduced in 4.3BSD-Reno.

MirOS BSD #10-current            June 4, 1993                                1

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