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0589e19fd7
The two liblvm functions that return a list of vgnames and vguuids use cmd->mem to allocate the list. Make it clear to the caller that this memory will be freed when the LVM handle is freed. Clean up and clarify the return value of the functions. In the case of a memory allocation error, add a couple log_errnos to the internal code, and make it clear that memory allocation returns a NULL pointer. If there are no VGs in the system, the list returned is an empty list. Make a note of the fact that currently we return hidden VG names, how these can be detected (always start with "#"), and that they should not be used. Author: Dave Wysochanski <dwysocha@redhat.com>
124 lines
2.4 KiB
C
124 lines
2.4 KiB
C
/*
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* Copyright (C) 2003-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2005 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "lib.h"
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#include "str_list.h"
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struct dm_list *str_list_create(struct dm_pool *mem)
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{
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struct dm_list *sl;
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if (!(sl = dm_pool_alloc(mem, sizeof(struct dm_list)))) {
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log_errno(ENOMEM, "str_list allocation failed");
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return NULL;
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}
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dm_list_init(sl);
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return sl;
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}
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int str_list_add(struct dm_pool *mem, struct dm_list *sll, const char *str)
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{
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struct str_list *sln;
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if (!str)
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return_0;
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/* Already in list? */
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if (str_list_match_item(sll, str))
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return 1;
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if (!(sln = dm_pool_alloc(mem, sizeof(*sln))))
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return_0;
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sln->str = str;
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dm_list_add(sll, &sln->list);
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return 1;
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}
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int str_list_del(struct dm_list *sll, const char *str)
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{
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struct dm_list *slh, *slht;
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dm_list_iterate_safe(slh, slht, sll) {
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if (!strcmp(str, dm_list_item(slh, struct str_list)->str))
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dm_list_del(slh);
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}
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return 1;
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}
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int str_list_dup(struct dm_pool *mem, struct dm_list *sllnew,
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const struct dm_list *sllold)
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{
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struct str_list *sl;
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dm_list_init(sllnew);
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dm_list_iterate_items(sl, sllold) {
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if (!str_list_add(mem, sllnew, dm_pool_strdup(mem, sl->str)))
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return_0;
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}
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return 1;
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}
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/*
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* Is item on list?
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*/
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int str_list_match_item(const struct dm_list *sll, const char *str)
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{
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struct str_list *sl;
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dm_list_iterate_items(sl, sll)
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if (!strcmp(str, sl->str))
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return 1;
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return 0;
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}
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/*
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* Is at least one item on both lists?
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*/
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int str_list_match_list(const struct dm_list *sll, const struct dm_list *sll2)
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{
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struct str_list *sl;
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dm_list_iterate_items(sl, sll)
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if (str_list_match_item(sll2, sl->str))
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return 1;
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return 0;
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}
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/*
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* Do both lists contain the same set of items?
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*/
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int str_list_lists_equal(const struct dm_list *sll, const struct dm_list *sll2)
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{
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struct str_list *sl;
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if (dm_list_size(sll) != dm_list_size(sll2))
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return 0;
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dm_list_iterate_items(sl, sll)
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if (!str_list_match_item(sll2, sl->str))
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return 0;
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return 1;
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}
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