[Qemu-devel] [PATCH 5/5] HMP: Introduce console command

[Lei Li <lilei@linux.vnet.ibm.com>]

Signed-off-by: Lei Li <lilei@linux.vnet.ibm.com>
---
 hmp.c     |   42 ++++++++++++++++++++++++++++++++++++++++++
 monitor.c |   18 ++++++++++++++++++
 monitor.h |    2 ++
 3 files changed, 62 insertions(+), 0 deletions(-)

diff --git a/hmp.c b/hmp.c
index 4397981..a016a5c 100644
--- a/hmp.c
+++ b/hmp.c
@@ -1205,3 +1205,45 @@ void hmp_screen_dump(Monitor *mon, const QDict *qdict)
     qmp_screendump(filename, &err);
     hmp_handle_error(mon, &err);
 }
+
+int console_escape_char = 0x1d; /* ctrl-] is used for escape */
+
+static void hmp_read_console(Monitor *mon, const char *data,
+                             void *opaque)
+{
+    CharDriverState *chr = opaque;
+    uint32_t size = strlen(data);
+    enum DataFormat format = DATA_FORMAT_UTF8;
+    enum CongestionControl control = CONGESTION_CONTROL_DROP;
+
+    Error *err = NULL;
+
+    if (*data == console_escape_char) {
+        monitor_resume(mon);
+        return;
+    }
+
+    qmp_memchar_write(chr->label, size, data, 0, format,
+                      0, control, &err);
+    monitor_read_command(mon, 1);
+}
+
+void hmp_console(Monitor *mon, const QDict *qdict)
+{
+    const char *device = qdict_get_str(qdict, "chardev");
+    CharDriverState *chr;
+    Error *err = NULL;
+
+    chr = qemu_chr_find(device);
+
+    if (!chr) {
+        error_set(&err, QERR_DEVICE_NOT_FOUND, device);
+        hmp_handle_error(mon, &err);
+        return;
+    }
+
+    if (monitor_read_console(mon, device, hmp_read_console, chr) < 0) {
+        monitor_printf(mon, "Connect to console %s failed\n", device);
+    }
+    g_free(chr);
+}
diff --git a/monitor.c b/monitor.c
index 67064e2..285dc7b 100644
--- a/monitor.c
+++ b/monitor.c
@@ -256,6 +256,24 @@ int monitor_read_password(Monitor *mon, ReadLineFunc *readline_func,
     }
 }
 
+int monitor_read_console(Monitor *mon, const char *device,
+                         ReadLineFunc *readline_func, void *opaque)
+{
+    char prompt[60];
+
+    if (!mon->rs)
+        return -1;
+
+    if (monitor_ctrl_mode(mon)) {
+        qerror_report(QERR_MISSING_PARAMETER, "console");
+        return -EINVAL;
+    }
+
+    snprintf(prompt, sizeof(prompt), "%s: ", device);
+    readline_start(mon->rs, prompt, 0, readline_func, opaque);
+    return 0;
+}
+
 void monitor_flush(Monitor *mon)
 {
     if (mon && mon->outbuf_index != 0 && !mon->mux_out) {
diff --git a/monitor.h b/monitor.h
index 64c1561..924a042 100644
--- a/monitor.h
+++ b/monitor.h
@@ -84,6 +84,8 @@ void monitor_read_command(Monitor *mon, int show_prompt);
 ReadLineState *monitor_get_rs(Monitor *mon);
 int monitor_read_password(Monitor *mon, ReadLineFunc *readline_func,
                           void *opaque);
+int monitor_read_console(Monitor *mon, const char *device,
+                         ReadLineFunc *readline_func, void *opaque);
 
 int qmp_qom_set(Monitor *mon, const QDict *qdict, QObject **ret);
 
-- 
1.7.7.6