revoke(2) - NetBSD Manual Pages

Command: Section: Arch: Collection:  
REVOKE(2)                 NetBSD System Calls Manual                 REVOKE(2)


NAME
revoke -- revoke file access
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h> int revoke(const char *path);
DESCRIPTION
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operations on any such descriptors fail, with the exceptions that a read(2) from a character device file which has been revoked returns a count of zero (end of file), and a close(2) call will succeed.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. 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 termi- nal.
RETURN VALUES
A 0 value indicates that the call succeeded. A -1 return value indicates an error occurred and errno is set to indicate the reason.
ERRORS
Access to the named file is revoked unless one of the following: [EACCES] Search permission is denied for a component of the path prefix. [EFAULT] path points outside the process's allocated address space. [ELOOP] Too many symbolic links were encountered in translat- ing the pathname. [ENAMETOOLONG] A component of a pathname exceeded {NAME_MAX} charac- ters, or an entire path name exceeded {PATH_MAX} char- acters. [ENOENT] The named file or a component of the path name does not exist. [ENOTDIR] A component of the path prefix is not a directory. [EPERM] The caller is neither the owner of the file nor the super user.
SEE ALSO
close(2), dup(2), fcntl(2), flock(2), fstat(2), read(2), write(2)
HISTORY
The revoke() function was introduced in 4.3BSD-Reno. NetBSD 9.99 July 3, 2011 NetBSD 9.99
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