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