1*86d7f5d3SJohn Marino /* $NetBSD: sharedlib.c,v 1.1.1.2 2009/02/18 11:17:18 haad Exp $ */
2*86d7f5d3SJohn Marino
3*86d7f5d3SJohn Marino /*
4*86d7f5d3SJohn Marino * Copyright (C) 2002-2004 Sistina Software, Inc. All rights reserved.
5*86d7f5d3SJohn Marino * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
6*86d7f5d3SJohn Marino *
7*86d7f5d3SJohn Marino * This file is part of LVM2.
8*86d7f5d3SJohn Marino *
9*86d7f5d3SJohn Marino * This copyrighted material is made available to anyone wishing to use,
10*86d7f5d3SJohn Marino * modify, copy, or redistribute it subject to the terms and conditions
11*86d7f5d3SJohn Marino * of the GNU Lesser General Public License v.2.1.
12*86d7f5d3SJohn Marino *
13*86d7f5d3SJohn Marino * You should have received a copy of the GNU Lesser General Public License
14*86d7f5d3SJohn Marino * along with this program; if not, write to the Free Software Foundation,
15*86d7f5d3SJohn Marino * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16*86d7f5d3SJohn Marino */
17*86d7f5d3SJohn Marino
18*86d7f5d3SJohn Marino #include "lib.h"
19*86d7f5d3SJohn Marino #include "config.h"
20*86d7f5d3SJohn Marino #include "lvm-string.h"
21*86d7f5d3SJohn Marino #include "sharedlib.h"
22*86d7f5d3SJohn Marino #include "toolcontext.h"
23*86d7f5d3SJohn Marino
24*86d7f5d3SJohn Marino #include <limits.h>
25*86d7f5d3SJohn Marino #include <sys/stat.h>
26*86d7f5d3SJohn Marino #include <dlfcn.h>
27*86d7f5d3SJohn Marino
get_shared_library_path(struct cmd_context * cmd,const char * libname,char * path,size_t path_len)28*86d7f5d3SJohn Marino void get_shared_library_path(struct cmd_context *cmd, const char *libname,
29*86d7f5d3SJohn Marino char *path, size_t path_len)
30*86d7f5d3SJohn Marino {
31*86d7f5d3SJohn Marino struct stat info;
32*86d7f5d3SJohn Marino const char *lib_dir;
33*86d7f5d3SJohn Marino
34*86d7f5d3SJohn Marino /* If libname doesn't begin with '/' then use lib_dir/libname,
35*86d7f5d3SJohn Marino * if present */
36*86d7f5d3SJohn Marino if (libname[0] == '/' ||
37*86d7f5d3SJohn Marino !(lib_dir = find_config_tree_str(cmd, "global/library_dir", 0)) ||
38*86d7f5d3SJohn Marino (dm_snprintf(path, path_len, "%s/%s", lib_dir,
39*86d7f5d3SJohn Marino libname) == -1) || stat(path, &info) == -1)
40*86d7f5d3SJohn Marino strncpy(path, libname, path_len);
41*86d7f5d3SJohn Marino }
42*86d7f5d3SJohn Marino
load_shared_library(struct cmd_context * cmd,const char * libname,const char * desc,int silent)43*86d7f5d3SJohn Marino void *load_shared_library(struct cmd_context *cmd, const char *libname,
44*86d7f5d3SJohn Marino const char *desc, int silent)
45*86d7f5d3SJohn Marino {
46*86d7f5d3SJohn Marino char path[PATH_MAX];
47*86d7f5d3SJohn Marino void *library;
48*86d7f5d3SJohn Marino
49*86d7f5d3SJohn Marino if (is_static()) {
50*86d7f5d3SJohn Marino log_error("Not loading shared %s library %s in static mode.",
51*86d7f5d3SJohn Marino desc, libname);
52*86d7f5d3SJohn Marino return NULL;
53*86d7f5d3SJohn Marino }
54*86d7f5d3SJohn Marino
55*86d7f5d3SJohn Marino get_shared_library_path(cmd, libname, path, sizeof(path));
56*86d7f5d3SJohn Marino
57*86d7f5d3SJohn Marino log_very_verbose("Opening shared %s library %s", desc, path);
58*86d7f5d3SJohn Marino
59*86d7f5d3SJohn Marino if (!(library = dlopen(path, RTLD_LAZY | RTLD_GLOBAL))) {
60*86d7f5d3SJohn Marino if (silent && ignorelockingfailure())
61*86d7f5d3SJohn Marino log_verbose("Unable to open external %s library %s: %s",
62*86d7f5d3SJohn Marino desc, path, dlerror());
63*86d7f5d3SJohn Marino else
64*86d7f5d3SJohn Marino log_error("Unable to open external %s library %s: %s",
65*86d7f5d3SJohn Marino desc, path, dlerror());
66*86d7f5d3SJohn Marino }
67*86d7f5d3SJohn Marino
68*86d7f5d3SJohn Marino return library;
69*86d7f5d3SJohn Marino }
70