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ff7e50e20a
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.
Adjust the two formatters which are used for capabilities and fix all
output files.
Note that the code is duplicated in qemucapabilitiesnumbering.c and
qemucapsprobemock.c, but later patches will replace
qemucapabilitiesnumbering.c by a python tool.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
143 lines
3.7 KiB
C
143 lines
3.7 KiB
C
/*
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* Copyright (C) 2016 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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*/
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#include <config.h>
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#include <dlfcn.h>
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#include "internal.h"
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#include "virjson.h"
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#include "qemu/qemu_monitor.h"
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#include "qemu/qemu_monitor_json.h"
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#define LIBVIRT_QEMU_MONITOR_PRIV_H_ALLOW
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#include "qemu/qemu_monitor_priv.h"
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#define REAL_SYM(realFunc) \
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do { \
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if (!realFunc && !(realFunc = dlsym(RTLD_NEXT, __FUNCTION__))) { \
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fprintf(stderr, "Cannot find real '%s' symbol\n", \
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__FUNCTION__); \
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abort(); \
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} \
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} while (0)
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static bool first = true;
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static void
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printLineSkipEmpty(const char *line,
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FILE *fp)
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{
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const char *p;
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for (p = line; *p; p++) {
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fputc(*p, fp);
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/* YAJL formats empty objects and arrays in a weird way:
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*
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* {
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* "emptyarray": [
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*
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* ],
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* "emptyobject": {
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*
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* }
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* }
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*
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* We want to use empty lines to separate commands and replies as
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* well as be compatible with python's 'json.dump' method, thus we drop
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* any whitespace between array/object braces.
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*/
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if ((p[0] == '{' || p[0] == '[') && p[1] == '\n') {
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const char *l = p + 1;
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while (*l && g_ascii_isspace(*l))
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l++;
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if (*l == '}' || *l == ']')
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p = l - 1;
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}
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}
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}
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static int (*realQemuMonitorSend)(qemuMonitor *mon,
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qemuMonitorMessage *msg);
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int
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qemuMonitorSend(qemuMonitor *mon,
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qemuMonitorMessage *msg)
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{
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g_autofree char *reformatted = NULL;
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REAL_SYM(realQemuMonitorSend);
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if (!(reformatted = virJSONStringReformat(msg->txBuffer, true))) {
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fprintf(stderr, "Failed to reformat command string '%s'\n", msg->txBuffer);
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abort();
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}
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if (first)
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first = false;
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else
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printLineSkipEmpty("\n", stdout);
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printLineSkipEmpty(reformatted, stdout);
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return realQemuMonitorSend(mon, msg);
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}
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static int (*realQemuMonitorJSONIOProcessLine)(qemuMonitor *mon,
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const char *line,
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qemuMonitorMessage *msg);
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int
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qemuMonitorJSONIOProcessLine(qemuMonitor *mon,
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const char *line,
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qemuMonitorMessage *msg)
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{
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g_autoptr(virJSONValue) value = NULL;
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g_autofree char *json = NULL;
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int ret;
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REAL_SYM(realQemuMonitorJSONIOProcessLine);
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ret = realQemuMonitorJSONIOProcessLine(mon, line, msg);
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if (ret == 0) {
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if (!(value = virJSONValueFromString(line)) ||
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!(json = virJSONValueToString(value, true))) {
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fprintf(stderr, "Failed to reformat reply string '%s'\n", line);
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abort();
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}
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/* Ignore QMP greeting */
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if (virJSONValueObjectHasKey(value, "QMP"))
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return 0;
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if (first)
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first = false;
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else
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printLineSkipEmpty("\n", stdout);
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printLineSkipEmpty(json, stdout);
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}
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return ret;
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}
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