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/*
* 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 "sharedlib.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 - 1);
path[path_len - 1] = '\0';
}
}
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;
}
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