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/*
* Copyright (C) 2016 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 <dlfcn.h>
#include "internal.h"
#include "virjson.h"
#include "qemu/qemu_monitor.h"
#include "qemu/qemu_monitor_json.h"
#define LIBVIRT_QEMU_MONITOR_PRIV_H_ALLOW
#include "qemu/qemu_monitor_priv.h"
#define REAL_SYM(realFunc) \
do { \
if (!realFunc && !(realFunc = dlsym(RTLD_NEXT, __FUNCTION__))) { \
fprintf(stderr, "Cannot find real '%s' symbol\n", \
__FUNCTION__); \
abort(); \
} \
} while (0)
static bool first = true;
static void
printLineSkipEmpty(const char *line,
FILE *fp)
{
const char *p;
for (p = line; *p; p++) {
fputc(*p, fp);
/* YAJL formats empty objects and arrays in a weird way:
*
* {
* "emptyarray": [
*
* ],
* "emptyobject": {
*
* }
* }
*
* We want to use empty lines to separate commands and replies as
* well as be compatible with python's 'json.dump' method, thus we drop
* any whitespace between array/object braces.
*/
if ((p[0] == '{' || p[0] == '[') && p[1] == '\n') {
const char *l = p + 1;
while (*l && g_ascii_isspace(*l))
l++;
if (*l == '}' || *l == ']')
p = l - 1;
}
}
}
static int (*realQemuMonitorSend)(qemuMonitor *mon,
qemuMonitorMessage *msg);
int
qemuMonitorSend(qemuMonitor *mon,
qemuMonitorMessage *msg)
{
g_autofree char *reformatted = NULL;
REAL_SYM(realQemuMonitorSend);
if (!(reformatted = virJSONStringReformat(msg->txBuffer, true))) {
fprintf(stderr, "Failed to reformat command string '%s'\n", msg->txBuffer);
abort();
}
if (first)
first = false;
else
printLineSkipEmpty("\n", stdout);
printLineSkipEmpty(reformatted, stdout);
return realQemuMonitorSend(mon, msg);
}
static int (*realQemuMonitorJSONIOProcessLine)(qemuMonitor *mon,
const char *line,
qemuMonitorMessage *msg);
int
qemuMonitorJSONIOProcessLine(qemuMonitor *mon,
const char *line,
qemuMonitorMessage *msg)
{
g_autoptr(virJSONValue) value = NULL;
g_autofree char *json = NULL;
int ret;
REAL_SYM(realQemuMonitorJSONIOProcessLine);
ret = realQemuMonitorJSONIOProcessLine(mon, line, msg);
if (ret == 0) {
if (!(value = virJSONValueFromString(line)) ||
!(json = virJSONValueToString(value, true))) {
fprintf(stderr, "Failed to reformat reply string '%s'\n", line);
abort();
}
/* Ignore QMP greeting */
if (virJSONValueObjectHasKey(value, "QMP"))
return 0;
if (first)
first = false;
else
printLineSkipEmpty("\n", stdout);
printLineSkipEmpty(json, stdout);
}
return ret;
}
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