1 /*	$NetBSD: vgcfgbackup.c,v 1.1.1.2 2009/12/02 00:25:56 haad Exp $	*/
2 
3 /*
4  * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
5  * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
6  *
7  * This file is part of LVM2.
8  *
9  * This copyrighted material is made available to anyone wishing to use,
10  * modify, copy, or redistribute it subject to the terms and conditions
11  * of the GNU Lesser General Public License v.2.1.
12  *
13  * You should have received a copy of the GNU Lesser General Public License
14  * along with this program; if not, write to the Free Software Foundation,
15  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
16  */
17 
18 #include "tools.h"
19 
20 static char *_expand_filename(const char *template, const char *vg_name,
21 			      char **last_filename)
22 {
23 	char *filename;
24 
25 	if (security_level())
26 		return dm_strdup(template);
27 
28 	if (!(filename = dm_malloc(PATH_MAX))) {
29 		log_error("Failed to allocate filename.");
30 		return NULL;
31 	}
32 
33 	if (snprintf(filename, PATH_MAX, template, vg_name) < 0) {
34 		log_error("Error processing filename template %s",
35 			   template);
36 		dm_free(filename);
37 		return NULL;
38 	}
39 	if (*last_filename && !strncmp(*last_filename, filename, PATH_MAX)) {
40 		log_error("VGs must be backed up into different files. "
41 			  "Use %%s in filename for VG name.");
42 		dm_free(filename);
43 		return NULL;
44 	}
45 
46 	dm_free(*last_filename);
47 	*last_filename = filename;
48 
49 	return filename;
50 }
51 
52 static int vg_backup_single(struct cmd_context *cmd, const char *vg_name,
53 			    struct volume_group *vg,
54 			    void *handle)
55 {
56 	char **last_filename = (char **)handle;
57 	char *filename;
58 
59 	if (arg_count(cmd, file_ARG)) {
60 		if (!(filename = _expand_filename(arg_value(cmd, file_ARG),
61 						  vg->name, last_filename))) {
62 			stack;
63 			return ECMD_FAILED;
64 		}
65 
66 		if (!backup_to_file(filename, vg->cmd->cmd_line, vg)) {
67 			stack;
68 			return ECMD_FAILED;
69 		}
70 	} else {
71 		if (vg_read_error(vg) == FAILED_INCONSISTENT) {
72 			log_error("No backup taken: specify filename with -f "
73 				  "to backup an inconsistent VG");
74 			stack;
75 			return ECMD_FAILED;
76 		}
77 
78 		/* just use the normal backup code */
79 		backup_enable(cmd, 1);	/* force a backup */
80 		if (!backup(vg)) {
81 			stack;
82 			return ECMD_FAILED;
83 		}
84 	}
85 
86 	log_print("Volume group \"%s\" successfully backed up.", vg_name);
87 	return ECMD_PROCESSED;
88 }
89 
90 int vgcfgbackup(struct cmd_context *cmd, int argc, char **argv)
91 {
92 	int ret;
93 	char *last_filename = NULL;
94 
95 	init_pvmove(1);
96 
97 	ret = process_each_vg(cmd, argc, argv, READ_ALLOW_INCONSISTENT,
98 			      &last_filename, &vg_backup_single);
99 
100 	dm_free(last_filename);
101 
102 	init_pvmove(0);
103 
104 	return ret;
105 }
106