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31 .\" @(#)revoke.2 8.1 (Berkeley) 6/4/93
39 .Nd revoke file access
45 .Fn revoke "const char *path"
49 system call invalidates all current open file descriptors in the system
52 Subsequent operations on any such descriptors
53 fail, with the exceptions that a
55 from a character device file which has been revoked
56 returns a count of zero (end of file),
59 system call will succeed.
60 If the file is a special file for a device which is open,
61 the device close function
62 is called as if all open references to the file had been closed
63 using a special close method which does not block.
65 Access to a file may be revoked only by its owner or the super user.
68 system call is currently supported only for block and character special
70 It is normally used to prepare a terminal device for a new login session,
71 preventing any access by a previous user of the terminal.
75 Access to the named file is revoked unless one of the following:
78 A component of the path prefix is not a directory.
79 .It Bq Er ENAMETOOLONG
80 A component of a pathname exceeded 255 characters,
81 or an entire path name exceeded 1024 characters.
83 The named file or a component of the path name does not exist.
85 Search permission is denied for a component of the path prefix.
87 Too many symbolic links were encountered in translating the pathname.
92 points outside the process's allocated address space.
94 The implementation does not support the
96 operation on the named file.
98 The caller is neither the owner of the file nor the super user.
106 system call first appeared in
109 The non-blocking close method is only correctly implemented for