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4f4c3b1397
Avoid the annoying issue where the public object freeing APIs overwrite the error set by helper functions, since they don't invoke the callback. The new helper remembers the error only if no previous error was set.
175 lines
4.4 KiB
C
175 lines
4.4 KiB
C
/*
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* virsh-util.c: helpers for virsh
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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 2.1 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, see
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* <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include "virsh-util.h"
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#include "virfile.h"
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#include "virstring.h"
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static virDomainPtr
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virshLookupDomainInternal(vshControl *ctl,
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const char *cmdname,
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const char *name,
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unsigned int flags)
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{
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virDomainPtr dom = NULL;
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int id;
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virCheckFlags(VIRSH_BYID | VIRSH_BYUUID | VIRSH_BYNAME, NULL);
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virshControlPtr priv = ctl->privData;
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/* try it by ID */
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if (flags & VIRSH_BYID) {
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if (virStrToLong_i(name, NULL, 10, &id) == 0 && id >= 0) {
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vshDebug(ctl, VSH_ERR_DEBUG, "%s: <domain> looks like ID\n",
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cmdname);
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dom = virDomainLookupByID(priv->conn, id);
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}
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}
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/* try it by UUID */
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if (!dom && (flags & VIRSH_BYUUID) &&
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strlen(name) == VIR_UUID_STRING_BUFLEN-1) {
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vshDebug(ctl, VSH_ERR_DEBUG, "%s: <domain> trying as domain UUID\n",
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cmdname);
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dom = virDomainLookupByUUIDString(priv->conn, name);
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}
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/* try it by NAME */
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if (!dom && (flags & VIRSH_BYNAME)) {
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vshDebug(ctl, VSH_ERR_DEBUG, "%s: <domain> trying as domain NAME\n",
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cmdname);
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dom = virDomainLookupByName(priv->conn, name);
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}
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vshResetLibvirtError();
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if (!dom)
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vshError(ctl, _("failed to get domain '%s'"), name);
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return dom;
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}
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virDomainPtr
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virshLookupDomainBy(vshControl *ctl,
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const char *name,
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unsigned int flags)
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{
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return virshLookupDomainInternal(ctl, "unknown", name, flags);
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}
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virDomainPtr
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virshCommandOptDomainBy(vshControl *ctl,
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const vshCmd *cmd,
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const char **name,
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unsigned int flags)
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{
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const char *n = NULL;
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const char *optname = "domain";
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if (vshCommandOptStringReq(ctl, cmd, optname, &n) < 0)
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return NULL;
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vshDebug(ctl, VSH_ERR_INFO, "%s: found option <%s>: %s\n",
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cmd->def->name, optname, n);
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if (name)
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*name = n;
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return virshLookupDomainInternal(ctl, cmd->def->name, n, flags);
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}
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virDomainPtr
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virshCommandOptDomain(vshControl *ctl,
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const vshCmd *cmd,
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const char **name)
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{
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return virshCommandOptDomainBy(ctl, cmd, name,
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VIRSH_BYID | VIRSH_BYUUID | VIRSH_BYNAME);
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}
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int
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virshDomainState(vshControl *ctl,
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virDomainPtr dom,
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int *reason)
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{
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virDomainInfo info;
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virshControlPtr priv = ctl->privData;
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if (reason)
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*reason = -1;
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if (!priv->useGetInfo) {
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int state;
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if (virDomainGetState(dom, &state, reason, 0) < 0) {
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virErrorPtr err = virGetLastError();
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if (err && err->code == VIR_ERR_NO_SUPPORT)
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priv->useGetInfo = true;
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else
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return -1;
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} else {
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return state;
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}
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}
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/* fall back to virDomainGetInfo if virDomainGetState is not supported */
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if (virDomainGetInfo(dom, &info) < 0)
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return -1;
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else
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return info.state;
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}
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int
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virshStreamSink(virStreamPtr st ATTRIBUTE_UNUSED,
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const char *bytes,
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size_t nbytes,
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void *opaque)
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{
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int *fd = opaque;
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return safewrite(*fd, bytes, nbytes);
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}
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void
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virshDomainFree(virDomainPtr dom)
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{
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if (!dom)
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return;
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vshSaveLibvirtHelperError();
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virDomainFree(dom); /* sc_prohibit_obj_free_apis_in_virsh */
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}
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void
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virshDomainSnapshotFree(virDomainSnapshotPtr snap)
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{
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if (!snap)
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return;
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vshSaveLibvirtHelperError();
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virDomainSnapshotFree(snap); /* sc_prohibit_obj_free_apis_in_virsh */
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}
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