mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-08-27 19:11:16 +00:00
Signed-off-by: Jiri Denemark <jdenemar@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
163 lines
4.4 KiB
C
163 lines
4.4 KiB
C
/*
|
|
* qemu_interop_config.c: QEMU firmware/vhost-user etc configs
|
|
*
|
|
* Copyright (C) 2019 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 2.1 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, see
|
|
* <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <config.h>
|
|
|
|
#include "qemu_interop_config.h"
|
|
#include "configmake.h"
|
|
#include "virerror.h"
|
|
#include "virfile.h"
|
|
#include "virhash.h"
|
|
#include "virlog.h"
|
|
#include "virutil.h"
|
|
|
|
#define VIR_FROM_THIS VIR_FROM_QEMU
|
|
|
|
VIR_LOG_INIT("qemu.qemu_configs");
|
|
|
|
static int
|
|
qemuBuildFileList(GHashTable *files, const char *dir)
|
|
{
|
|
g_autoptr(DIR) dirp = NULL;
|
|
struct dirent *ent = NULL;
|
|
int rc;
|
|
|
|
if ((rc = virDirOpenIfExists(&dirp, dir)) < 0)
|
|
return -1;
|
|
|
|
if (rc == 0)
|
|
return 0;
|
|
|
|
while ((rc = virDirRead(dirp, &ent, dir)) > 0) {
|
|
g_autofree char *filename = NULL;
|
|
g_autofree char *path = NULL;
|
|
struct stat sb;
|
|
|
|
if (STRPREFIX(ent->d_name, "."))
|
|
continue;
|
|
|
|
filename = g_strdup(ent->d_name);
|
|
|
|
path = g_strdup_printf("%s/%s", dir, filename);
|
|
|
|
if (stat(path, &sb) < 0) {
|
|
virReportSystemError(errno, _("Unable to access %1$s"), path);
|
|
return -1;
|
|
}
|
|
|
|
if (!S_ISREG(sb.st_mode) && !S_ISLNK(sb.st_mode))
|
|
continue;
|
|
|
|
if (virHashUpdateEntry(files, filename, path) < 0)
|
|
return -1;
|
|
|
|
path = NULL;
|
|
}
|
|
|
|
if (rc < 0)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define QEMU_CONFDIR SYSCONFDIR "/qemu"
|
|
|
|
int
|
|
qemuInteropFetchConfigs(const char *name,
|
|
char ***configs,
|
|
bool privileged)
|
|
{
|
|
g_autoptr(GHashTable) files = virHashNew(g_free);
|
|
g_autofree char *homeConfig = NULL;
|
|
g_autofree char *xdgConfig = NULL;
|
|
g_autofree char *dataLocation = virFileBuildPath(QEMU_DATADIR, name, NULL);
|
|
g_autofree char *confLocation = virFileBuildPath(QEMU_CONFDIR, name, NULL);
|
|
g_autofree virHashKeyValuePair *pairs = NULL;
|
|
size_t npairs;
|
|
virHashKeyValuePair *tmp = NULL;
|
|
size_t nconfigs = 0;
|
|
|
|
*configs = NULL;
|
|
|
|
if (!privileged) {
|
|
/* This is a slight divergence from the specification.
|
|
* Since the system daemon runs as root, it doesn't make
|
|
* much sense to parse files in root's home directory. It
|
|
* makes sense only for session daemon which runs under
|
|
* regular user. */
|
|
xdgConfig = g_strdup(getenv("XDG_CONFIG_HOME"));
|
|
|
|
if (!xdgConfig) {
|
|
g_autofree char *home = virGetUserDirectory();
|
|
|
|
xdgConfig = g_strdup_printf("%s/.config", home);
|
|
}
|
|
|
|
homeConfig = g_strdup_printf("%s/qemu/%s", xdgConfig, name);
|
|
}
|
|
|
|
if (qemuBuildFileList(files, dataLocation) < 0)
|
|
return -1;
|
|
|
|
if (qemuBuildFileList(files, confLocation) < 0)
|
|
return -1;
|
|
|
|
if (homeConfig &&
|
|
qemuBuildFileList(files, homeConfig) < 0)
|
|
return -1;
|
|
|
|
/* At this point, the @files hash table contains unique set of filenames
|
|
* where each filename (as key) has the highest priority full pathname
|
|
* associated with it. */
|
|
|
|
if (!(pairs = virHashGetItems(files, &npairs, true)))
|
|
return -1;
|
|
|
|
if (npairs == 0)
|
|
return 0;
|
|
|
|
*configs = g_new0(char *, npairs + 1);
|
|
|
|
for (tmp = pairs; tmp->key; tmp++) {
|
|
const char *path = tmp->value;
|
|
off_t len;
|
|
|
|
if ((len = virFileLength(path, -1)) < 0) {
|
|
virReportSystemError(errno,
|
|
_("unable to get size of '%1$s'"),
|
|
path);
|
|
return -1;
|
|
}
|
|
|
|
VIR_DEBUG("%s description path '%s' len=%jd",
|
|
name, path, (intmax_t) len);
|
|
|
|
if (len == 0) {
|
|
/* Empty files are used to mask less specific instances
|
|
* of the same file. */
|
|
continue;
|
|
}
|
|
|
|
(*configs)[nconfigs++] = g_strdup(path);
|
|
}
|
|
|
|
return 0;
|
|
}
|