Copyright (C) 2000 Steinar H. Gunderson
This program is is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License, version 2 if the
+ it under the terms of the GNU General Public License, version 2 of the
License as published by the Free Software Foundation.
This program is distributed in the hope that it will be useful,
#include <config.h>
#endif
-#if HAVE_TIME_H
-#include <time.h>
-#endif
-
-#if HAVE_SYS_TIME_H
-#include <sys/time.h>
-#endif
-
-#if HAVE_PWD_H
-#include <pwd.h>
-#endif
-
-#if HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-
-#if HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
-
#if HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
-#if HAVE_NETINET_IN_H
-#include <netinet/in.h>
-#endif
-
#if HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <strings.h>
#endif
-#include <ftpd.h>
-
#if WANT_DCACHE
+#include <ftpd.h>
#include <dcache.h>
extern struct dcache *first_dcache;
return d;
}
+/*
+ * destroy_dcache():
+ * Destroy a directory listing cache entry, remove it from the
+ * linked list, and clean up after it.
+ *
+ * If you free a cache entry that is in use (use_count > 0),
+ * BetaFTPD will most likely crash (later). The thing you're supposed
+ * to do when you're done with a dcache entry, is to decrement
+ * its use_count, and let the timeout functions do the destroying
+ * when it's time to do so.
+ */
+void destroy_dcache(struct dcache * const d)
+{
+ if (d == NULL) return;
+
+ if (d->dir_data != NULL) free(d->dir_data);
+ remove_from_linked_list((struct list_element *)d);
+}
+
/*
* time_out_dcache():
* Time out expired directory listing cache entries.
d->lo = *lo;
}
}
+
+/*
+ * find_dcache():
+ * Check if there is an existing dcache object matching our
+ * criteria.
+ */
+struct dcache *find_dcache(const char * const cwd, const char * const pattern,
+ const struct list_options * const lo)
+{
+ struct dcache *d = NULL, *next = first_dcache->next_dcache;
+ struct stat buf;
+
+ if (stat(cwd, &buf) > -1) {
+ /* run through the linked list */
+ while (next != NULL) {
+ d = next;
+ next = d->next_dcache;
+
+ if (buf.st_mtime <= d->generated &&
+ strcmp(d->dir_name, cwd) == 0 &&
+ strcmp(d->pattern, pattern) == 0 &&
+ memcmp(&(d->lo), lo, sizeof(struct list_options)) == 0) {
+ return d;
+ }
+ }
+ }
+ return NULL;
+}
#endif /* WANT_DCACHE */