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https://github.com/libguestfs/libguestfs.git
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106 lines
2.5 KiB
C
106 lines
2.5 KiB
C
/* libguestfs
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* Copyright (C) 2015 Red Hat Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <config.h>
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#include <string.h>
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#include <libintl.h>
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#include "guestfs.h"
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#include "guestfs-internal.h"
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#include "guestfs-internal-actions.h"
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static const struct cached_feature *
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find_or_cache_feature (guestfs_h *g, const char *group)
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{
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struct cached_feature *f;
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size_t i;
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int res;
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for (i = 0; i < g->nr_features; ++i) {
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f = &g->features[i];
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if (STRNEQ (f->group, group))
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continue;
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return f;
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}
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res = guestfs_internal_feature_available (g, group);
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if (res < 0)
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return 0; /* internal_feature_available sent an error. */
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g->features =
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safe_realloc (g, g->features,
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(g->nr_features+1) * sizeof (struct cached_feature));
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f = &g->features[g->nr_features];
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++g->nr_features;
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f->group = safe_strdup (g, group);
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f->result = res;
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return f;
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}
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int
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guestfs_impl_available (guestfs_h *g, char *const *groups)
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{
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char *const *ptr;
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for (ptr = groups; *ptr != NULL; ++ptr) {
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const char *group = *ptr;
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const struct cached_feature *f = find_or_cache_feature (g, group);
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if (f == NULL)
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return -1;
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if (f->result == 2) {
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error (g, _("%s: unknown group"), group);
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return -1;
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} else if (f->result == 1) {
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error (g, _("%s: group not available"), group);
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return -1;
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}
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}
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return 0;
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}
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int
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guestfs_impl_feature_available (guestfs_h *g, char *const *groups)
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{
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char *const *ptr;
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for (ptr = groups; *ptr != NULL; ++ptr) {
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const char *group = *ptr;
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const struct cached_feature *f = find_or_cache_feature (g, group);
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if (f == NULL)
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return -1;
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if (f->result == 2) {
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error (g, _("%s: unknown group"), group);
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return -1;
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} else if (f->result == 1) {
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return 0;
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}
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}
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/* All specified groups available. */
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return 1;
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}
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