revoke(2) - NetBSD Manual Pages

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REVOKE(2)                 NetBSD System Calls Manual                 REVOKE(2)

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operations on any such descriptors fail, with the exceptions that a read() from a character device file which has been revoked returns a count of zero (end of file), and a close() call will succeed.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 ses- sion, 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 translat- ing 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. NetBSD 5.0.1 March 22, 1999 NetBSD 5.0.1
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