1 files changed, 67 insertions, 0 deletions
diff --git a/lib/misc/sharedlib.c b/lib/misc/sharedlib.c
new file mode 100644
index 0000000..cab2909
--- /dev/null
+++ b/lib/misc/sharedlib.c
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2002-2004 Sistina Software, Inc. All rights reserved.
+ * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
+ *
+ * This file is part of LVM2.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU Lesser General Public License v.2.1.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "lib.h"
+#include "config.h"
+#include "lvm-string.h"
+#include "sharedlib.h"
+#include "toolcontext.h"
+
+#include <limits.h>
+#include <sys/stat.h>
+#include <dlfcn.h>
+
+void get_shared_library_path(struct cmd_context *cmd, const char *libname,
+			     char *path, size_t path_len)
+{
+	struct stat info;
+	const char *lib_dir;
+
+	/* If libname doesn't begin with '/' then use lib_dir/libname,
+	 * if present */
+	if (libname[0] == '/' ||
+	    !(lib_dir = find_config_tree_str(cmd, "global/library_dir", 0)) ||
+	    (dm_snprintf(path, path_len, "%s/%s", lib_dir,
+			  libname) == -1) || stat(path, &info) == -1)
+		strncpy(path, libname, path_len);
+}
+
+void *load_shared_library(struct cmd_context *cmd, const char *libname,
+			  const char *desc, int silent)
+{
+	char path[PATH_MAX];
+	void *library;
+
+	if (is_static()) {
+		log_error("Not loading shared %s library %s in static mode.",
+			  desc, libname);
+		return NULL;
+	}
+
+	get_shared_library_path(cmd, libname, path, sizeof(path));
+
+	log_very_verbose("Opening shared %s library %s", desc, path);
+
+	if (!(library = dlopen(path, RTLD_LAZY | RTLD_GLOBAL))) {
+		if (silent && ignorelockingfailure())
+			log_verbose("Unable to open external %s library %s: %s",
+				    desc, path, dlerror());
+		else
+			log_error("Unable to open external %s library %s: %s",
+				  desc, path, dlerror());
+	}
+
+	return library;
+}