1 /* dcache.c: BetaFTPD directory listing cache
2 Copyright (C) 2000 Steinar H. Gunderson
4 This program is is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License, version 2 if the
6 License as published by the Free Software Foundation.
8 This program is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 GNU General Public License for more details.
13 You should have received a copy of the GNU General Public License
14 along with this program; if not, write to the Free Software
15 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
35 #include <sys/types.h>
39 #include <sys/socket.h>
47 #include <netinet/in.h>
67 extern struct dcache *first_dcache;
71 * Allocates a new directory cache entry (type `struct dcache'),
72 * and adds it to the linked list.
74 struct dcache *alloc_new_dcache()
76 struct dcache *d = (struct dcache *)(malloc(sizeof(struct dcache)));
78 if (d == NULL) return d;
82 strcpy(d->dir_name, "");
85 add_to_linked_list((struct list_element *)first_dcache,
86 (struct list_element *)d);
93 * Time out expired directory listing cache entries.
94 * Uses much of the same code as time_out_sockets().
96 void time_out_dcache()
98 struct dcache *d = NULL, *next = first_dcache->next_dcache;
99 time_t now = time(NULL);
101 /* run through the linked list */
102 while (next != NULL) {
104 next = d->next_dcache;
106 if (d->use_count == 0 && (now - d->last_used > 900)) {
114 * Add a new entry in the dcache, using information from
115 * the given file transfer object, and the current directory
118 void populate_dcache(struct ftran * const f, const char * const cwd,
119 const char * const pattern, const struct list_options * const lo)
122 struct dcache *d = alloc_new_dcache();
123 if (d != NULL && stat(cwd, &buf) > -1) {
126 d->dir_data = f->file_data;
127 d->dir_size = f->size;
128 d->generated = buf.st_mtime;
130 strcpy(d->dir_name, cwd);
131 strncpy(d->pattern, pattern, 255);
136 #endif /* WANT_DCACHE */