mirror of
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Since we introduced listing API earlier in these series, it's time to wire up the API to the virt-admin client. Signed-off-by: Erik Skultety <eskultet@redhat.com>
766 lines
20 KiB
C
766 lines
20 KiB
C
/*
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* virt-admin.c: a shell to exercise the libvirt admin API
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*
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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 2.1 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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* Authors:
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* Erik Skultety <eskultet@redhat.com>
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*/
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#include <config.h>
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#include "virt-admin.h"
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#include <errno.h>
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#include <getopt.h>
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#include <locale.h>
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#if WITH_READLINE
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# include <readline/readline.h>
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# include <readline/history.h>
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#endif
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#include "configmake.h"
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#include "internal.h"
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#include "viralloc.h"
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#include "virerror.h"
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#include "virfile.h"
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#include "virstring.h"
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#include "virthread.h"
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/* Gnulib doesn't guarantee SA_SIGINFO support. */
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#ifndef SA_SIGINFO
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# define SA_SIGINFO 0
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#endif
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#define VIRT_ADMIN_PROMPT "virt-admin # "
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static char *progname;
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static const vshCmdGrp cmdGroups[];
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static const vshClientHooks hooks;
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/*
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* vshAdmCatchDisconnect:
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*
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* We get here when the connection was closed. Unlike virsh, we do not save
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* the fact that the event was raised, sice there is virAdmConnectIsAlive to
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* check if the communication channel has not been closed by remote party.
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*/
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static void
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vshAdmCatchDisconnect(virAdmConnectPtr conn ATTRIBUTE_UNUSED,
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int reason,
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void *opaque)
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{
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vshControl *ctl = opaque;
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const char *str = "unknown reason";
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virErrorPtr error;
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char *uri = NULL;
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if (reason == VIR_CONNECT_CLOSE_REASON_CLIENT)
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return;
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error = virSaveLastError();
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uri = virAdmConnectGetURI(conn);
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switch ((virConnectCloseReason) reason) {
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case VIR_CONNECT_CLOSE_REASON_ERROR:
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str = N_("Disconnected from %s due to I/O error");
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break;
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case VIR_CONNECT_CLOSE_REASON_EOF:
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str = N_("Disconnected from %s due to end of file");
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break;
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case VIR_CONNECT_CLOSE_REASON_KEEPALIVE:
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str = N_("Disconnected from %s due to keepalive timeout");
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break;
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/* coverity[dead_error_condition] */
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case VIR_CONNECT_CLOSE_REASON_CLIENT:
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case VIR_CONNECT_CLOSE_REASON_LAST:
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break;
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}
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vshError(ctl, _(str), NULLSTR(uri));
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if (error) {
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virSetError(error);
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virFreeError(error);
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}
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}
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static int
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vshAdmConnect(vshControl *ctl, unsigned int flags)
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{
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vshAdmControlPtr priv = ctl->privData;
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priv->conn = virAdmConnectOpen(ctl->connname, flags);
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if (!priv->conn) {
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if (priv->wantReconnect)
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vshError(ctl, "%s", _("Failed to reconnect to the admin server"));
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else
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vshError(ctl, "%s", _("Failed to connect to the admin server"));
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return -1;
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} else {
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if (virAdmConnectRegisterCloseCallback(priv->conn, vshAdmCatchDisconnect,
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NULL, NULL) < 0)
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vshError(ctl, "%s", _("Unable to register disconnect callback"));
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if (priv->wantReconnect)
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vshPrint(ctl, "%s\n", _("Reconnected to the admin server"));
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else
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vshPrint(ctl, "%s\n", _("Connected to the admin server"));
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}
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return 0;
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}
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static int
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vshAdmDisconnect(vshControl *ctl)
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{
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int ret = 0;
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vshAdmControlPtr priv = ctl->privData;
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if (!priv->conn)
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return ret;
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virAdmConnectUnregisterCloseCallback(priv->conn, vshAdmCatchDisconnect);
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ret = virAdmConnectClose(priv->conn);
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if (ret < 0)
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vshError(ctl, "%s", _("Failed to disconnect from the admin server"));
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else if (ret > 0)
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vshError(ctl, "%s", _("One or more references were leaked after "
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"disconnect from the hypervisor"));
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priv->conn = NULL;
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return ret;
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}
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/*
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* vshAdmReconnect:
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*
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* Reconnect to a daemon's admin server
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*
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*/
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static void
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vshAdmReconnect(vshControl *ctl)
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{
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vshAdmControlPtr priv = ctl->privData;
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if (priv->conn)
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priv->wantReconnect = true;
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vshAdmDisconnect(ctl);
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vshAdmConnect(ctl, 0);
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priv->wantReconnect = false;
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}
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/*
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* 'uri' command
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*/
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static const vshCmdInfo info_uri[] = {
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{.name = "help",
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.data = N_("print the admin server URI")
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},
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{.name = "desc",
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.data = ""
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},
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{.name = NULL}
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};
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static bool
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cmdURI(vshControl *ctl, const vshCmd *cmd ATTRIBUTE_UNUSED)
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{
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char *uri;
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vshAdmControlPtr priv = ctl->privData;
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uri = virAdmConnectGetURI(priv->conn);
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if (!uri) {
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vshError(ctl, "%s", _("failed to get URI"));
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return false;
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}
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vshPrint(ctl, "%s\n", uri);
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VIR_FREE(uri);
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return true;
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}
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/*
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* "version" command
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*/
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static const vshCmdInfo info_version[] = {
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{.name = "help",
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.data = N_("show version")
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},
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{.name = "desc",
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.data = N_("Display the system and also the daemon version information.")
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},
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{.name = NULL}
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};
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static bool
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cmdVersion(vshControl *ctl, const vshCmd *cmd ATTRIBUTE_UNUSED)
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{
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unsigned long libVersion;
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unsigned long long includeVersion;
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unsigned long long daemonVersion;
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int ret;
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unsigned int major;
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unsigned int minor;
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unsigned int rel;
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vshAdmControlPtr priv = ctl->privData;
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includeVersion = LIBVIR_VERSION_NUMBER;
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major = includeVersion / 1000000;
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includeVersion %= 1000000;
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minor = includeVersion / 1000;
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rel = includeVersion % 1000;
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vshPrint(ctl, _("Compiled against library: libvirt %d.%d.%d\n"),
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major, minor, rel);
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ret = virGetVersion(&libVersion, NULL, NULL);
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if (ret < 0) {
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vshError(ctl, "%s", _("failed to get the library version"));
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return false;
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}
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major = libVersion / 1000000;
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libVersion %= 1000000;
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minor = libVersion / 1000;
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rel = libVersion % 1000;
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vshPrint(ctl, _("Using library: libvirt %d.%d.%d\n"),
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major, minor, rel);
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ret = virAdmConnectGetLibVersion(priv->conn, &daemonVersion);
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if (ret < 0) {
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vshError(ctl, "%s", _("failed to get the daemon version"));
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} else {
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major = daemonVersion / 1000000;
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daemonVersion %= 1000000;
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minor = daemonVersion / 1000;
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rel = daemonVersion % 1000;
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vshPrint(ctl, _("Running against daemon: %d.%d.%d\n"),
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major, minor, rel);
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}
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return true;
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}
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/* ---------------
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* Command Connect
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* ---------------
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*/
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static const vshCmdOptDef opts_connect[] = {
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{.name = "name",
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.type = VSH_OT_STRING,
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.flags = VSH_OFLAG_EMPTY_OK,
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.help = N_("daemon's admin server connection URI")
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},
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{.name = NULL}
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};
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static const vshCmdInfo info_connect[] = {
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{.name = "help",
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.data = N_("connect to daemon's admin server")
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},
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{.name = "desc",
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.data = N_("Connect to a daemon's administrating server.")
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},
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{.name = NULL}
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};
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static bool
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cmdConnect(vshControl *ctl, const vshCmd *cmd)
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{
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const char *name = NULL;
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vshAdmControlPtr priv = ctl->privData;
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if (vshCommandOptStringReq(ctl, cmd, "name", &name) < 0)
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return false;
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VIR_FREE(ctl->connname);
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ctl->connname = vshStrdup(ctl, name);
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vshAdmReconnect(ctl);
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return !!priv->conn;
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}
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/* ---------------
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* Command srv-list
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* ---------------
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*/
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static const vshCmdInfo info_srv_list[] = {
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{.name = "help",
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.data = N_("list available servers on a daemon")
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},
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{.name = "desc",
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.data = N_("List all manageable servers on a daemon.")
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},
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{.name = NULL}
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};
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static bool
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cmdSrvList(vshControl *ctl, const vshCmd *cmd ATTRIBUTE_UNUSED)
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{
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int nsrvs = 0;
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size_t i;
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bool ret = false;
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const char *uri = NULL;
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virAdmServerPtr *srvs = NULL;
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vshAdmControlPtr priv = ctl->privData;
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/* Obtain a list of available servers on the daemon */
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if ((nsrvs = virAdmConnectListServers(priv->conn, &srvs, 0)) < 0) {
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uri = virAdmConnectGetURI(priv->conn);
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vshError(ctl, _("failed to obtain list of available servers from %s"),
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NULLSTR(uri));
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goto cleanup;
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}
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printf(" %-5s %-15s\n", "Id", "Name");
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printf("---------------\n");
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for (i = 0; i < nsrvs; i++)
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vshPrint(ctl, " %-5zu %-15s\n", i, virAdmServerGetName(srvs[i]));
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ret = true;
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cleanup:
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if (srvs) {
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for (i = 0; i < nsrvs; i++)
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virAdmServerFree(srvs[i]);
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VIR_FREE(srvs);
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}
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return ret;
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}
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static void *
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vshAdmConnectionHandler(vshControl *ctl)
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{
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vshAdmControlPtr priv = ctl->privData;
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if (!virAdmConnectIsAlive(priv->conn))
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vshAdmReconnect(ctl);
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if (!virAdmConnectIsAlive(priv->conn)) {
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vshError(ctl, "%s", _("no valid connection"));
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return NULL;
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}
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return priv->conn;
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}
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/*
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* Initialize connection.
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*/
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static bool
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vshAdmInit(vshControl *ctl)
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{
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vshAdmControlPtr priv = ctl->privData;
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|
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/* Since we have the commandline arguments parsed, we need to
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* reload our initial settings to make debugging and readline
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* work properly */
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vshInitReload(ctl);
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if (priv->conn)
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return false;
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/* set up the library error handler */
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virSetErrorFunc(NULL, vshErrorHandler);
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if (virEventRegisterDefaultImpl() < 0)
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return false;
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if (virThreadCreate(&ctl->eventLoop, true, vshEventLoop, ctl) < 0)
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return false;
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ctl->eventLoopStarted = true;
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if (ctl->connname) {
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vshAdmReconnect(ctl);
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/* Connecting to a named connection must succeed, but we delay
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* connecting to the default connection until we need it
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* (since the first command might be 'connect' which allows a
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* non-default connection, or might be 'help' which needs no
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* connection).
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*/
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if (!priv->conn) {
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vshReportError(ctl);
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return false;
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}
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}
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return true;
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}
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static void
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vshAdmDeinitTimer(int timer ATTRIBUTE_UNUSED, void *opaque ATTRIBUTE_UNUSED)
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{
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/* nothing to be done here */
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}
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|
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/*
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* Deinitialize virt-admin
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*/
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static void
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vshAdmDeinit(vshControl *ctl)
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{
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vshAdmControlPtr priv = ctl->privData;
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vshDeinit(ctl);
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VIR_FREE(ctl->connname);
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|
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if (priv->conn)
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vshAdmDisconnect(ctl);
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virResetLastError();
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|
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if (ctl->eventLoopStarted) {
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int timer;
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virMutexLock(&ctl->lock);
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ctl->quit = true;
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/* HACK: Add a dummy timeout to break event loop */
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timer = virEventAddTimeout(0, vshAdmDeinitTimer, NULL, NULL);
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virMutexUnlock(&ctl->lock);
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|
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virThreadJoin(&ctl->eventLoop);
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|
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if (timer != -1)
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virEventRemoveTimeout(timer);
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ctl->eventLoopStarted = false;
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}
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|
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virMutexDestroy(&ctl->lock);
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}
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|
|
/*
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* Print usage
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*/
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static void
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vshAdmUsage(void)
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|
{
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const vshCmdGrp *grp;
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const vshCmdDef *cmd;
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fprintf(stdout, _("\n%s [options]... [<command_string>]"
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"\n%s [options]... <command> [args...]\n\n"
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" options:\n"
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" -c | --connect=URI daemon admin connection URI\n"
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|
" -d | --debug=NUM debug level [0-4]\n"
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|
" -h | --help this help\n"
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|
" -l | --log=FILE output logging to file\n"
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|
" -q | --quiet quiet mode\n"
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|
" -v short version\n"
|
|
" -V long version\n"
|
|
" --version[=TYPE] version, TYPE is short or long (default short)\n"
|
|
" commands (non interactive mode):\n\n"), progname,
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progname);
|
|
|
|
for (grp = cmdGroups; grp->name; grp++) {
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|
fprintf(stdout, _(" %s (help keyword '%s')\n"),
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grp->name, grp->keyword);
|
|
for (cmd = grp->commands; cmd->name; cmd++) {
|
|
if (cmd->flags & VSH_CMD_FLAG_ALIAS)
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continue;
|
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fprintf(stdout,
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" %-30s %s\n", cmd->name,
|
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_(vshCmddefGetInfo(cmd, "help")));
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|
}
|
|
fprintf(stdout, "\n");
|
|
}
|
|
|
|
fprintf(stdout, "%s",
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|
_("\n (specify help <group> for details about the commands in the group)\n"));
|
|
fprintf(stdout, "%s",
|
|
_("\n (specify help <command> for details about the command)\n\n"));
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Show version and options compiled in
|
|
*/
|
|
static void
|
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vshAdmShowVersion(vshControl *ctl ATTRIBUTE_UNUSED)
|
|
{
|
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/* FIXME - list a copyright blurb, as in GNU programs? */
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|
vshPrint(ctl, _("Virt-admin command line tool of libvirt %s\n"), VERSION);
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vshPrint(ctl, _("See web site at %s\n\n"), "http://libvirt.org/");
|
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|
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vshPrint(ctl, "%s", _("Compiled with support for:"));
|
|
#ifdef WITH_LIBVIRTD
|
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vshPrint(ctl, " Daemon");
|
|
#endif
|
|
#ifdef ENABLE_DEBUG
|
|
vshPrint(ctl, " Debug");
|
|
#endif
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|
#if WITH_READLINE
|
|
vshPrint(ctl, " Readline");
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|
#endif
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|
vshPrint(ctl, "\n");
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|
}
|
|
|
|
static bool
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vshAdmParseArgv(vshControl *ctl, int argc, char **argv)
|
|
{
|
|
int arg, debug;
|
|
size_t i;
|
|
int longindex = -1;
|
|
struct option opt[] = {
|
|
{"connect", required_argument, NULL, 'c'},
|
|
{"debug", required_argument, NULL, 'd'},
|
|
{"help", no_argument, NULL, 'h'},
|
|
{"log", required_argument, NULL, 'l'},
|
|
{"quiet", no_argument, NULL, 'q'},
|
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{"version", optional_argument, NULL, 'v'},
|
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{NULL, 0, NULL, 0}
|
|
};
|
|
|
|
/* Standard (non-command) options. The leading + ensures that no
|
|
* argument reordering takes place, so that command options are
|
|
* not confused with top-level virt-admin options. */
|
|
while ((arg = getopt_long(argc, argv, "+:c:d:hl:qvV", opt, &longindex)) != -1) {
|
|
switch (arg) {
|
|
case 'c':
|
|
VIR_FREE(ctl->connname);
|
|
ctl->connname = vshStrdup(ctl, optarg);
|
|
break;
|
|
case 'd':
|
|
if (virStrToLong_i(optarg, NULL, 10, &debug) < 0) {
|
|
vshError(ctl, _("option %s takes a numeric argument"),
|
|
longindex == -1 ? "-d" : "--debug");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
if (debug < VSH_ERR_DEBUG || debug > VSH_ERR_ERROR)
|
|
vshError(ctl, _("ignoring debug level %d out of range [%d-%d]"),
|
|
debug, VSH_ERR_DEBUG, VSH_ERR_ERROR);
|
|
else
|
|
ctl->debug = debug;
|
|
break;
|
|
case 'h':
|
|
vshAdmUsage();
|
|
exit(EXIT_SUCCESS);
|
|
break;
|
|
case 'l':
|
|
vshCloseLogFile(ctl);
|
|
ctl->logfile = vshStrdup(ctl, optarg);
|
|
vshOpenLogFile(ctl);
|
|
break;
|
|
case 'q':
|
|
ctl->quiet = true;
|
|
break;
|
|
case 'v':
|
|
if (STRNEQ_NULLABLE(optarg, "long")) {
|
|
puts(VERSION);
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
/* fall through */
|
|
case 'V':
|
|
vshAdmShowVersion(ctl);
|
|
exit(EXIT_SUCCESS);
|
|
case ':':
|
|
for (i = 0; opt[i].name != NULL; i++) {
|
|
if (opt[i].val == optopt)
|
|
break;
|
|
}
|
|
if (opt[i].name)
|
|
vshError(ctl, _("option '-%c'/'--%s' requires an argument"),
|
|
optopt, opt[i].name);
|
|
else
|
|
vshError(ctl, _("option '-%c' requires an argument"), optopt);
|
|
exit(EXIT_FAILURE);
|
|
case '?':
|
|
if (optopt)
|
|
vshError(ctl, _("unsupported option '-%c'. See --help."), optopt);
|
|
else
|
|
vshError(ctl, _("unsupported option '%s'. See --help."), argv[optind - 1]);
|
|
exit(EXIT_FAILURE);
|
|
default:
|
|
vshError(ctl, _("unknown option"));
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
longindex = -1;
|
|
}
|
|
|
|
if (argc == optind) {
|
|
ctl->imode = true;
|
|
} else {
|
|
/* parse command */
|
|
ctl->imode = false;
|
|
if (argc - optind == 1) {
|
|
vshDebug(ctl, VSH_ERR_INFO, "commands: \"%s\"\n", argv[optind]);
|
|
return vshCommandStringParse(ctl, argv[optind]);
|
|
} else {
|
|
return vshCommandArgvParse(ctl, argc - optind, argv + optind);
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static const vshCmdDef vshAdmCmds[] = {
|
|
VSH_CMD_CD,
|
|
VSH_CMD_ECHO,
|
|
VSH_CMD_EXIT,
|
|
VSH_CMD_HELP,
|
|
VSH_CMD_PWD,
|
|
VSH_CMD_QUIT,
|
|
{.name = "uri",
|
|
.handler = cmdURI,
|
|
.opts = NULL,
|
|
.info = info_uri,
|
|
.flags = 0
|
|
},
|
|
{.name = "version",
|
|
.handler = cmdVersion,
|
|
.opts = NULL,
|
|
.info = info_version,
|
|
.flags = 0
|
|
},
|
|
{.name = "connect",
|
|
.handler = cmdConnect,
|
|
.opts = opts_connect,
|
|
.info = info_connect,
|
|
.flags = VSH_CMD_FLAG_NOCONNECT
|
|
},
|
|
{.name = NULL}
|
|
};
|
|
|
|
static const vshCmdDef monitoringCmds[] = {
|
|
{.name = "srv-list",
|
|
.handler = cmdSrvList,
|
|
.opts = NULL,
|
|
.info = info_srv_list,
|
|
.flags = 0
|
|
},
|
|
{.name = NULL}
|
|
};
|
|
|
|
static const vshCmdGrp cmdGroups[] = {
|
|
{"Virt-admin itself", "virt-admin", vshAdmCmds},
|
|
{"Monitoring commands", "monitor", monitoringCmds},
|
|
{NULL, NULL, NULL}
|
|
};
|
|
|
|
static const vshClientHooks hooks = {
|
|
.connHandler = vshAdmConnectionHandler
|
|
};
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
vshControl _ctl, *ctl = &_ctl;
|
|
vshAdmControl virtAdminCtl;
|
|
const char *defaultConn;
|
|
bool ret = true;
|
|
|
|
memset(ctl, 0, sizeof(vshControl));
|
|
memset(&virtAdminCtl, 0, sizeof(vshAdmControl));
|
|
ctl->name = "virt-admin"; /* hardcoded name of the binary */
|
|
ctl->log_fd = -1; /* Initialize log file descriptor */
|
|
ctl->debug = VSH_DEBUG_DEFAULT;
|
|
ctl->hooks = &hooks;
|
|
|
|
ctl->eventPipe[0] = -1;
|
|
ctl->eventPipe[1] = -1;
|
|
ctl->privData = &virtAdminCtl;
|
|
|
|
if (!(progname = strrchr(argv[0], '/')))
|
|
progname = argv[0];
|
|
else
|
|
progname++;
|
|
ctl->progname = progname;
|
|
|
|
if (!setlocale(LC_ALL, "")) {
|
|
perror("setlocale");
|
|
/* failure to setup locale is not fatal */
|
|
}
|
|
if (!bindtextdomain(PACKAGE, LOCALEDIR)) {
|
|
perror("bindtextdomain");
|
|
return EXIT_FAILURE;
|
|
}
|
|
if (!textdomain(PACKAGE)) {
|
|
perror("textdomain");
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
if (isatty(STDIN_FILENO)) {
|
|
ctl->istty = true;
|
|
|
|
#ifndef WIN32
|
|
if (tcgetattr(STDIN_FILENO, &ctl->termattr) < 0)
|
|
ctl->istty = false;
|
|
#endif
|
|
}
|
|
|
|
if (virMutexInit(&ctl->lock) < 0) {
|
|
vshError(ctl, "%s", _("Failed to initialize mutex"));
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
virFileActivateDirOverride(argv[0]);
|
|
|
|
if ((defaultConn = virGetEnvBlockSUID("LIBVIRT_DEFAULT_ADMIN_URI")))
|
|
ctl->connname = vshStrdup(ctl, defaultConn);
|
|
|
|
if (!vshInit(ctl, cmdGroups, NULL))
|
|
exit(EXIT_FAILURE);
|
|
|
|
if (!vshAdmParseArgv(ctl, argc, argv) ||
|
|
!vshAdmInit(ctl)) {
|
|
vshAdmDeinit(ctl);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
if (!ctl->imode) {
|
|
ret = vshCommandRun(ctl, ctl->cmd);
|
|
} else {
|
|
/* interactive mode */
|
|
if (!ctl->quiet) {
|
|
vshPrint(ctl,
|
|
_("Welcome to %s, the administrating virtualization "
|
|
"interactive terminal.\n\n"),
|
|
progname);
|
|
vshPrint(ctl, "%s",
|
|
_("Type: 'help' for help with commands\n"
|
|
" 'quit' to quit\n\n"));
|
|
}
|
|
|
|
do {
|
|
ctl->cmdstr = vshReadline(ctl, VIRT_ADMIN_PROMPT);
|
|
if (ctl->cmdstr == NULL)
|
|
break; /* EOF */
|
|
if (*ctl->cmdstr) {
|
|
#if WITH_READLINE
|
|
add_history(ctl->cmdstr);
|
|
#endif
|
|
if (vshCommandStringParse(ctl, ctl->cmdstr))
|
|
vshCommandRun(ctl, ctl->cmd);
|
|
}
|
|
VIR_FREE(ctl->cmdstr);
|
|
} while (ctl->imode);
|
|
|
|
if (ctl->cmdstr == NULL)
|
|
fputc('\n', stdout); /* line break after alone prompt */
|
|
}
|
|
|
|
vshAdmDeinit(ctl);
|
|
exit(ret ? EXIT_SUCCESS : EXIT_FAILURE);
|
|
}
|