Initial import

[samba] / source / smbd / mangle.c

diff --git a/source/smbd/mangle.c b/source/smbd/mangle.c
new file mode 100644 (file)
index 0000000..ed69a62
--- /dev/null
+++ b/source/smbd/mangle.c
@@ -0,0 +1,131 @@
+/* 
+   Unix SMB/CIFS implementation.
+   Name mangling interface
+   Copyright (C) Andrew Tridgell 2002
+   
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+static struct mangle_fns *mangle_fns;
+
+/* this allows us to add more mangling backends */
+static const struct {
+       const char *name;
+       struct mangle_fns *(*init_fn)(void);
+} mangle_backends[] = {
+       { "hash", mangle_hash_init },
+       { "hash2", mangle_hash2_init },
+       { "posix", posix_mangle_init },
+       /*{ "tdb", mangle_tdb_init }, */
+       { NULL, NULL }
+};
+
+/*
+  initialise the mangling subsystem
+*/
+static void mangle_init(void)
+{
+       int i;
+       const char *method;
+
+       if (mangle_fns)
+               return;
+
+       method = lp_mangling_method();
+
+       /* find the first mangling method that manages to initialise and
+          matches the "mangling method" parameter */
+       for (i=0; mangle_backends[i].name && !mangle_fns; i++) {
+               if (!method || !*method || strcmp(method, mangle_backends[i].name) == 0) {
+                       mangle_fns = mangle_backends[i].init_fn();
+               }
+       }
+
+       if (!mangle_fns) {
+               DEBUG(0,("Failed to initialise mangling system '%s'\n", method));
+               exit_server("mangling init failed");
+       }
+}
+
+
+/*
+  reset the cache. This is called when smb.conf has been reloaded
+*/
+void mangle_reset_cache(void)
+{
+       mangle_init();
+       mangle_fns->reset();
+}
+
+void mangle_change_to_posix(void)
+{
+       mangle_fns = NULL;
+       lp_set_mangling_method("posix");
+       mangle_reset_cache();
+}
+
+/*
+  see if a filename has come out of our mangling code
+*/
+BOOL mangle_is_mangled(const char *s, int snum)
+{
+       return mangle_fns->is_mangled(s, snum);
+}
+
+/*
+  see if a filename matches the rules of a 8.3 filename
+*/
+BOOL mangle_is_8_3(const char *fname, BOOL check_case, int snum)
+{
+       return mangle_fns->is_8_3(fname, check_case, False, snum);
+}
+
+BOOL mangle_is_8_3_wildcards(const char *fname, BOOL check_case, int snum)
+{
+       return mangle_fns->is_8_3(fname, check_case, True, snum);
+}
+
+/*
+  try to reverse map a 8.3 name to the original filename. This doesn't have to 
+  always succeed, as the directory handling code in smbd will scan the directory
+  looking for a matching name if it doesn't. It should succeed most of the time
+  or there will be a huge performance penalty
+*/
+BOOL mangle_check_cache(char *s, size_t maxlen, int snum)
+{
+       return mangle_fns->check_cache(s, maxlen, snum);
+}
+
+/* 
+   map a long filename to a 8.3 name. 
+ */
+
+void mangle_map(pstring OutName, BOOL need83, BOOL cache83, int snum)
+{
+       /* name mangling can be disabled for speed, in which case
+          we just truncate the string */
+       if (!lp_manglednames(snum)) {
+               if (need83) {
+                       string_truncate(OutName, 12);
+               }
+               return;
+       }
+
+       /* invoke the inane "mangled map" code */
+       mangle_map_filename(OutName, snum);
+       mangle_fns->name_map(OutName, need83, cache83, lp_defaultcase(snum), snum);
+}