From 05fe12f8b0ff970b8fa04b6c4b68ae20c48c4e09 Mon Sep 17 00:00:00 2001
From: fredrik <fredrik@959494ce-11ee-0310-bf91-de5d638817bd>
Date: Tue, 21 Nov 2006 19:55:57 +0000
Subject: [PATCH] Add variable storage db.

git-svn-id: svn+ssh://svn.dolda2000.com/srv/svn/repos/src/doldaconnect@745 959494ce-11ee-0310-bf91-de5d638817bd
---
 configure.in  |  1 +
 daemon/conf.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 daemon/conf.h |  2 ++
 3 files changed, 49 insertions(+)

diff --git a/configure.in b/configure.in
index 6620508..3952c66 100644
--- a/configure.in
+++ b/configure.in
@@ -13,6 +13,7 @@ AC_CHECK_LIB(pam, pam_start, , AC_MSG_ERROR([*** must have PAM]))
 AC_CHECK_LIB(dl, dlopen, , AC_MSG_ERROR([*** PAM requires a working dynamic loader (libdl)]))
 AC_CHECK_LIB(z, deflate, , AC_MSG_ERROR([*** must have zlib]))
 AC_CHECK_LIB(bz2, BZ2_bzWriteOpen, , AC_MSG_ERROR([*** must have bzlib]))
+AC_CHECK_LIB(gdbm, gdbm_open, , AC_MSG_ERROR([*** must have gdbm]))
 
 clients=
 extlibs=
diff --git a/daemon/conf.c b/daemon/conf.c
index 6fd317b..54a79cb 100644
--- a/daemon/conf.c
+++ b/daemon/conf.c
@@ -28,6 +28,7 @@
 #include <wchar.h>
 #include <iconv.h>
 #include <arpa/inet.h>
+#include <gdbm.h>
 
 #ifdef HAVE_CONFIG_H
 #include <config.h>
@@ -360,3 +361,48 @@ void readconfig(FILE *stream)
     if(state != 0)
 	flog(LOG_WARNING, "unexpected end of file");
 }
+
+/* {store,fetch}var re-opens the database every time, just in case two
+ * doldacond processes would be running simultaneously. */
+void storevar(char *key, void *val, size_t len)
+{
+    char *dbname;
+    GDBM_FILE db;
+    datum k, v;
+    
+    dbname = findfile("dc-vardb", "dc-vardb", NULL, 1);
+    if((db = gdbm_open(dbname, 0, GDBM_WRCREAT, 0666, NULL)) == NULL)
+    {
+	flog(LOG_CRIT, "could not open var database for writing, cannot continue: %s", gdbm_strerror(gdbm_errno));
+	abort();
+    }
+    free(dbname);
+    k.dptr = key;
+    k.dsize = strlen(key);
+    v.dptr = val;
+    v.dsize = len;
+    gdbm_store(db, k, v, GDBM_REPLACE);
+    gdbm_close(db);
+}
+
+void *fetchvar(char *key, size_t *lenb)
+{
+    char *dbname;
+    GDBM_FILE db;
+    datum k, v;
+    
+    if((dbname = findfile("dc-vardb", "dc-vardb", NULL, 0)) == NULL)
+	return(NULL);
+    if((db = gdbm_open(dbname, 0, GDBM_READER, 0666, NULL)) == NULL)
+	return(NULL);
+    free(dbname);
+    k.dptr = key;
+    k.dsize = strlen(key);
+    v = gdbm_fetch(db, k);
+    gdbm_close(db);
+    if(v.dptr == NULL)
+	return(NULL);
+    if(lenb != NULL)
+	*lenb = v.dsize;
+    return(v.dptr);
+}
diff --git a/daemon/conf.h b/daemon/conf.h
index e6b7465..cd12614 100644
--- a/daemon/conf.h
+++ b/daemon/conf.h
@@ -68,5 +68,7 @@ struct configvar *confgetvar(char *modname, char *varname);
 #define confgetstr(m, v) (confgetvar((m), (v))->val.str)
 void confregmod(struct configmod *mod);
 void readconfig(FILE *stream);
+void storevar(char *key, void *val, size_t len);
+void *fetchvar(char *key, size_t *lenb);
 
 #endif
-- 
2.11.0