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REVOKE(2) System Calls Manual REVOKE(2)

revokerevoke file access

#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operations on any such descriptors fail, with the exceptions that a () from a character device file which has been revoked returns a count of zero (end of file), and a () call will succeed.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 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:

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A component of the path prefix is not a directory.
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A component of a pathname exceeded 255 characters, or an entire path name exceeded 1024 characters.
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The named file or a component of the path name does not exist.
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Search permission is denied for a component of the path prefix.
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Too many symbolic links were encountered in translating the pathname.
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path points outside the process's allocated address space.
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The caller is neither the owner of the file nor the superuser.

close(2)

The revoke function was introduced in 4.3BSD-Reno.

May 31, 2007 OpenBSD-5.4