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124 lines
3.2 KiB
C
124 lines
3.2 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "tools.h"
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static char *_expand_filename(const char *template, const char *vg_name,
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char **last_filename)
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{
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char *filename;
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if (security_level()) {
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if (!(filename = strdup(template))) {
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log_error("Failed to allocate filename.");
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return NULL;
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}
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goto out;
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}
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if (!(filename = malloc(PATH_MAX))) {
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log_error("Failed to allocate filename.");
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return NULL;
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}
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/* coverity[non_const_printf_format_string] */
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if (dm_snprintf(filename, PATH_MAX, template, vg_name) < 0) {
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log_error("Error processing filename template %s",
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template);
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free(filename);
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return NULL;
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}
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if (*last_filename && !strncmp(*last_filename, filename, PATH_MAX)) {
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log_error("VGs must be backed up into different files. "
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"Use %%s in filename for VG name.");
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free(filename);
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return NULL;
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}
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out:
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free(*last_filename);
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*last_filename = filename;
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return filename;
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}
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static int _vg_backup_single(struct cmd_context *cmd, const char *vg_name,
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struct volume_group *vg,
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struct processing_handle *handle)
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{
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char **last_filename = (char **)handle->custom_handle;
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char *filename;
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if (arg_is_set(cmd, file_ARG)) {
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if (!(filename = _expand_filename(arg_value(cmd, file_ARG),
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vg->name, last_filename)))
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return_ECMD_FAILED;
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if (!backup_to_file(filename, vg->cmd->cmd_line, vg))
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return_ECMD_FAILED;
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} else {
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if (vg_missing_pv_count(vg)) {
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log_error("No backup taken: specify filename with -f to backup with missing PVs.");
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return ECMD_FAILED;
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}
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if (vg_has_unknown_segments(vg)) {
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log_error("No backup taken: specify filename with -f to backup with unknown segments.");
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return ECMD_FAILED;
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}
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/* just use the normal backup code */
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backup_enable(cmd, 1); /* force a backup */
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if (!backup(vg))
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return_ECMD_FAILED;
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}
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log_print_unless_silent("Volume group \"%s\" successfully backed up.", vg_name);
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return ECMD_PROCESSED;
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}
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int vgcfgbackup(struct cmd_context *cmd, int argc, char **argv)
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{
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int ret;
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char *last_filename = NULL;
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struct processing_handle *handle = NULL;
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if (!(handle = init_processing_handle(cmd, NULL))) {
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log_error("Failed to initialize processing handle.");
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return ECMD_FAILED;
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}
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handle->custom_handle = &last_filename;
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/*
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* Just set so that we can do the check ourselves above and
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* report a helpful error message in place of the error message
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* that would be generated from vg_read.
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*/
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cmd->handles_missing_pvs = 1;
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cmd->handles_unknown_segments = 1;
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init_pvmove(1);
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ret = process_each_vg(cmd, argc, argv, NULL, NULL, 0, 0,
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handle, &_vg_backup_single);
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free(last_filename);
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init_pvmove(0);
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destroy_processing_handle(cmd, handle);
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return ret;
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}
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