1 .\" $NetBSD: revoke.2,v 1.3 1995/10/12 15:41:11 jtc Exp $
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37 .\" @(#)revoke.2 8.1 (Berkeley) 6/4/93
44 .Nd revoke file access
46 .Fd #include <unistd.h>
48 .Fn revoke "const char *path"
52 function invalidates all current open file descriptors in the system
55 Subsequent operations on any such descriptors
56 fail, with the exceptions that a
58 from a character device file which has been revoked
59 returns a count of zero (end of file),
63 If the file is a special file for a device which is open,
64 the device close function
65 is called as if all open references to the file had been closed.
67 Access to a file may be revoked only by its owner or the super user.
70 function is currently supported only for block and character special
72 It is normally used to prepare a terminal device for a new login session,
73 preventing any access by a previous user of the terminal.
75 A 0 value indicated that the call succeeded. A \-1 return value
76 indicates an error occurred and
78 is set to indicated the reason.
80 Access to the named file is revoked unless one of the following:
83 A component of the path prefix is not a directory.
84 .It Bq Er ENAMETOOLONG
85 A component of a pathname exceeded 255 characters,
86 or an entire path name exceeded 1024 characters.
88 The named file or a component of the path name does not exist.
90 Search permission is denied for a component of the path prefix.
92 Too many symbolic links were encountered in translating the pathname.
95 points outside the process's allocated address space.
97 The named file is neither a character special or block
100 The caller is neither the owner of the file nor the super user.
107 function was introduced in