char: Move HMP commands from monitor/ to chardev/

This moves these commands from MAINTAINERS sections "Human
Monitor (HMP)" and "QMP" to "Character device backends".

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230124121946.1139465-4-armbru@redhat.com>

2 files changed, 225 insertions, 1 deletions

diff --git a/chardev/char-hmp-cmds.c b/chardev/char-hmp-cmds.c
new file mode 100644
index 0000000000..287c2b1bcd
--- /dev/null
+++ b/chardev/char-hmp-cmds.c
@@ -0,0 +1,220 @@
+/*
+ * HMP commands related to character devices
+ *
+ * Copyright IBM, Corp. 2011
+ *
+ * Authors:
+ *  Anthony Liguori   <aliguori@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.  See
+ * the COPYING file in the top-level directory.
+ *
+ * Contributions after 2012-01-13 are licensed under the terms of the
+ * GNU GPL, version 2 or (at your option) any later version.
+ */
+
+#include "qemu/osdep.h"
+#include "chardev/char.h"
+#include "monitor/hmp.h"
+#include "monitor/monitor.h"
+#include "qapi/error.h"
+#include "qapi/qapi-commands-char.h"
+#include "qapi/qmp/qdict.h"
+#include "qemu/config-file.h"
+#include "qemu/option.h"
+
+void hmp_info_chardev(Monitor *mon, const QDict *qdict)
+{
+    ChardevInfoList *char_info, *info;
+
+    char_info = qmp_query_chardev(NULL);
+    for (info = char_info; info; info = info->next) {
+        monitor_printf(mon, "%s: filename=%s\n", info->value->label,
+                                                 info->value->filename);
+    }
+
+    qapi_free_ChardevInfoList(char_info);
+}
+
+void hmp_ringbuf_write(Monitor *mon, const QDict *qdict)
+{
+    const char *chardev = qdict_get_str(qdict, "device");
+    const char *data = qdict_get_str(qdict, "data");
+    Error *err = NULL;
+
+    qmp_ringbuf_write(chardev, data, false, 0, &err);
+
+    hmp_handle_error(mon, err);
+}
+
+void hmp_ringbuf_read(Monitor *mon, const QDict *qdict)
+{
+    uint32_t size = qdict_get_int(qdict, "size");
+    const char *chardev = qdict_get_str(qdict, "device");
+    char *data;
+    Error *err = NULL;
+    int i;
+
+    data = qmp_ringbuf_read(chardev, size, false, 0, &err);
+    if (hmp_handle_error(mon, err)) {
+        return;
+    }
+
+    for (i = 0; data[i]; i++) {
+        unsigned char ch = data[i];
+
+        if (ch == '\\') {
+            monitor_printf(mon, "\\\\");
+        } else if ((ch < 0x20 && ch != '\n' && ch != '\t') || ch == 0x7F) {
+            monitor_printf(mon, "\\u%04X", ch);
+        } else {
+            monitor_printf(mon, "%c", ch);
+        }
+
+    }
+    monitor_printf(mon, "\n");
+    g_free(data);
+}
+
+void hmp_chardev_add(Monitor *mon, const QDict *qdict)
+{
+    const char *args = qdict_get_str(qdict, "args");
+    Error *err = NULL;
+    QemuOpts *opts;
+
+    opts = qemu_opts_parse_noisily(qemu_find_opts("chardev"), args, true);
+    if (opts == NULL) {
+        error_setg(&err, "Parsing chardev args failed");
+    } else {
+        qemu_chr_new_from_opts(opts, NULL, &err);
+        qemu_opts_del(opts);
+    }
+    hmp_handle_error(mon, err);
+}
+
+void hmp_chardev_change(Monitor *mon, const QDict *qdict)
+{
+    const char *args = qdict_get_str(qdict, "args");
+    const char *id;
+    Error *err = NULL;
+    ChardevBackend *backend = NULL;
+    ChardevReturn *ret = NULL;
+    QemuOpts *opts = qemu_opts_parse_noisily(qemu_find_opts("chardev"), args,
+                                             true);
+    if (!opts) {
+        error_setg(&err, "Parsing chardev args failed");
+        goto end;
+    }
+
+    id = qdict_get_str(qdict, "id");
+    if (qemu_opts_id(opts)) {
+        error_setg(&err, "Unexpected 'id' parameter");
+        goto end;
+    }
+
+    backend = qemu_chr_parse_opts(opts, &err);
+    if (!backend) {
+        goto end;
+    }
+
+    ret = qmp_chardev_change(id, backend, &err);
+
+end:
+    qapi_free_ChardevReturn(ret);
+    qapi_free_ChardevBackend(backend);
+    qemu_opts_del(opts);
+    hmp_handle_error(mon, err);
+}
+
+void hmp_chardev_remove(Monitor *mon, const QDict *qdict)
+{
+    Error *local_err = NULL;
+
+    qmp_chardev_remove(qdict_get_str(qdict, "id"), &local_err);
+    hmp_handle_error(mon, local_err);
+}
+
+void hmp_chardev_send_break(Monitor *mon, const QDict *qdict)
+{
+    Error *local_err = NULL;
+
+    qmp_chardev_send_break(qdict_get_str(qdict, "id"), &local_err);
+    hmp_handle_error(mon, local_err);
+}
+
+void chardev_add_completion(ReadLineState *rs, int nb_args, const char *str)
+{
+    size_t len;
+    ChardevBackendInfoList *list, *start;
+
+    if (nb_args != 2) {
+        return;
+    }
+    len = strlen(str);
+    readline_set_completion_index(rs, len);
+
+    start = list = qmp_query_chardev_backends(NULL);
+    while (list) {
+        const char *chr_name = list->value->name;
+
+        if (!strncmp(chr_name, str, len)) {
+            readline_add_completion(rs, chr_name);
+        }
+        list = list->next;
+    }
+    qapi_free_ChardevBackendInfoList(start);
+}
+
+void chardev_remove_completion(ReadLineState *rs, int nb_args, const char *str)
+{
+    size_t len;
+    ChardevInfoList *list, *start;
+
+    if (nb_args != 2) {
+        return;
+    }
+    len = strlen(str);
+    readline_set_completion_index(rs, len);
+
+    start = list = qmp_query_chardev(NULL);
+    while (list) {
+        ChardevInfo *chr = list->value;
+
+        if (!strncmp(chr->label, str, len)) {
+            readline_add_completion(rs, chr->label);
+        }
+        list = list->next;
+    }
+    qapi_free_ChardevInfoList(start);
+}
+
+static void ringbuf_completion(ReadLineState *rs, const char *str)
+{
+    size_t len;
+    ChardevInfoList *list, *start;
+
+    len = strlen(str);
+    readline_set_completion_index(rs, len);
+
+    start = list = qmp_query_chardev(NULL);
+    while (list) {
+        ChardevInfo *chr_info = list->value;
+
+        if (!strncmp(chr_info->label, str, len)) {
+            Chardev *chr = qemu_chr_find(chr_info->label);
+            if (chr && CHARDEV_IS_RINGBUF(chr)) {
+                readline_add_completion(rs, chr_info->label);
+            }
+        }
+        list = list->next;
+    }
+    qapi_free_ChardevInfoList(start);
+}
+
+void ringbuf_write_completion(ReadLineState *rs, int nb_args, const char *str)
+{
+    if (nb_args != 2) {
+        return;
+    }
+    ringbuf_completion(rs, str);
+}
diff --git a/chardev/meson.build b/chardev/meson.build
index 789b50056a..7a3ba777ab 100644
--- a/chardev/meson.build
+++ b/chardev/meson.build
@@ -28,7 +28,11 @@ chardev_ss.add(when: 'CONFIG_WIN32', if_true: files(
 
 chardev_ss = chardev_ss.apply(config_host, strict: false)
 
-softmmu_ss.add(files('msmouse.c', 'wctablet.c', 'testdev.c'))
+softmmu_ss.add(files(
+    'char-hmp-cmds.c',
+    'msmouse.c',
+    'wctablet.c',
+    'testdev.c'))
 
 chardev_modules = {}