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