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Annotation of fam/fam/DirEntry.c++, Revision 1.1.1.1

1.1       trev        1: //  Copyright (C) 1999 Silicon Graphics, Inc.  All Rights Reserved.
                      2: //
                      3: //  This program is free software; you can redistribute it and/or modify it
                      4: //  under the terms of version 2 of the GNU General Public License as
                      5: //  published by the Free Software Foundation.
                      6: //
                      7: //  This program is distributed in the hope that it would be useful, but
                      8: //  WITHOUT ANY WARRANTY; without even the implied warranty of
                      9: //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  Further, any
                     10: //  license provided herein, whether implied or otherwise, is limited to
                     11: //  this program in accordance with the express provisions of the GNU
                     12: //  General Public License.  Patent licenses, if any, provided herein do not
                     13: //  apply to combinations of this program with other product or programs, or
                     14: //  any other product whatsoever.  This program is distributed without any
                     15: //  warranty that the program is delivered free of the rightful claim of any
                     16: //  third person by way of infringement or the like.  See the GNU General
                     17: //  Public License for more details.
                     18: //
                     19: //  You should have received a copy of the GNU General Public License along
                     20: //  with this program; if not, write the Free Software Foundation, Inc., 59
                     21: //  Temple Place - Suite 330, Boston MA 02111-1307, USA.
                     22:
                     23: #include "DirEntry.h"
                     24:
                     25: #include <assert.h>
                     26: #include <stdio.h>
                     27: #include <sys/param.h>
                     28:
                     29: #include "Directory.h"
                     30:
                     31: // A DirEntry may be polled iff its parent is not polled.
                     32:
                     33: DirEntry::DirEntry(const char *name, Directory *p, DirEntry *nx)
                     34:     : Interest(name, p->filesystem(), p->host(), NO_VERIFY_EXPORTED),
                     35:       parent(p), next(nx), need_to_chdir(true)
                     36: { }
                     37:
                     38: DirEntry::~DirEntry()
                     39: {
                     40:     unscan();
                     41: }
                     42:
                     43: bool
                     44: DirEntry::active() const
                     45: {
                     46:     return parent->active();
                     47: }
                     48:
                     49: void
                     50: DirEntry::post_event(const Event& event, const char *eventpath)
                     51: {
                     52:     assert(!eventpath);
                     53:     parent->post_event(event, name());
                     54: }
                     55:
                     56: bool
                     57: DirEntry::scan(Interest *ip)
                     58: {
                     59:     assert(!ip);
                     60:     return parent->scan(this);
                     61: }
                     62:
                     63: void
                     64: DirEntry::scan_no_chdir()
                     65: {
                     66:     need_to_chdir = false;
                     67:     parent->scan(this);
                     68:     need_to_chdir = true;
                     69:
                     70: }
                     71:
                     72: void
                     73: DirEntry::unscan(Interest *ip)
                     74: {
                     75:     assert(!ip);
                     76:     parent->unscan(this);
                     77: }
                     78:
                     79: bool
                     80: DirEntry::do_scan()
                     81: {
                     82:     bool changed = false;
                     83:     if (needs_scan() && active()) {
                     84:         if (need_to_chdir) {
                     85:             parent->become_user();
                     86:             if (!parent->chdir()) {
                     87:                 return false;
                     88:             }
                     89:         }
                     90:         changed = Interest::do_scan();
                     91:         if (need_to_chdir) {
                     92:             parent->chdir_root();
                     93:         }
                     94:     }
                     95:     return changed;
                     96: }
                     97:
                     98: void
                     99: DirEntry::notify_created(Interest *ip)
                    100: {
                    101:     assert(ip == this);
                    102:     parent->notify_created(ip);
                    103: }
                    104:
                    105: void
                    106: DirEntry::notify_deleted(Interest *ip)
                    107: {
                    108:     assert(ip == this);
                    109:     parent->notify_deleted(ip);
                    110: }