NAME
valid_write - checks if a certain person has write permission on a file
SYNOPSIS
int valid_write(string file, mixed user, string func);
DESCRIPTION
Every time a user tries to write a file, thie driver calls valid_write
in the master object to check if the write should be allowed. The
arguments are the filename, the name of the person making the write, and
the calling function name. If valid_write returns non-zero, the write is
allowed.
SEE ALSO
valid_read(4)