[PATCH 11/25] efw-downloader: subcmd-device: implement 'device' sub command to operate actual device

[Takashi Sakamoto]

This commit implements 'device' sub command to operate the target device.
This sub command consists of several operations and parser for the
operation will be implemented in future commits.

Signed-off-by: Takashi Sakamoto <o-takashi at sakamocchi.jp>
---
 efw-downloader/src/main.c          |  4 ++
 efw-downloader/src/meson.build     |  2 +
 efw-downloader/src/subcmd-device.c | 77 ++++++++++++++++++++++++++++++
 efw-downloader/src/subcmds.h       |  8 ++++
 4 files changed, 91 insertions(+)
 create mode 100644 efw-downloader/src/subcmd-device.c
 create mode 100644 efw-downloader/src/subcmds.h

diff --git a/efw-downloader/src/main.c b/efw-downloader/src/main.c
index 499e67e..e150cc8 100644
--- a/efw-downloader/src/main.c
+++ b/efw-downloader/src/main.c
@@ -4,6 +4,8 @@
 #include <stdlib.h>
 #include <string.h>
 
+#include "subcmds.h"
+
 static void print_help()
 {
     printf("Usage\n"
@@ -11,6 +13,7 @@ static void print_help()
            "\n"
            "where:\n"
            "  SUBCOMMAND:\n"
+           "    device:     operate for device for unit on IEEE 1394 bus\n"
            "    help:       print help\n"
            "  OPTIONS:      optional arguments dependent on the subcommand\n");
 }
@@ -22,6 +25,7 @@ int main(int argc, char **argv)
     size_t size;
         int (*op)(int argc, char **argv);
     } *entry, entries[] = {
+        { "device", sizeof("device"), subcmd_device },
     };
     const char *subcmd;
     int i;
diff --git a/efw-downloader/src/meson.build b/efw-downloader/src/meson.build
index ca894d9..07a6182 100644
--- a/efw-downloader/src/meson.build
+++ b/efw-downloader/src/meson.build
@@ -14,10 +14,12 @@ hinawa = dependency('hinawa',
 sources = [
   'main.c',
   'efw-proto.c',
+  'subcmd-device.c',
 ]
 
 headers = [
   'efw-proto.h',
+  'subcmds.h',
 ]
 
 gnome = import('gnome')
diff --git a/efw-downloader/src/subcmd-device.c b/efw-downloader/src/subcmd-device.c
new file mode 100644
index 0000000..739944e
--- /dev/null
+++ b/efw-downloader/src/subcmd-device.c
@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2020 Takashi Sakamoto
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <assert.h>
+
+#include "efw-proto.h"
+
+static int print_help()
+{
+    printf("Usage\n"
+           "  efw-downloader device CDEV OPERATION ARGUMENTS\n"
+           "\n"
+           "where:\n"
+           "  CDEV:   The firewire character device corresponding to the node for transaction\n"
+           "  OPERATION:\n"
+           "    help:   print this help message\n"
+           "  ARGUMENTS:\n"
+           "    depending on OPERATION\n"
+           "\n");
+    return EXIT_FAILURE;
+}
+
+static int parse_args(int argc, char **argv, const char **path, const char **op_name)
+{
+    if (argc < 2)
+        return -EINVAL;
+    assert(strncmp(argv[1], "device", sizeof("device")) == 0);
+
+    if (argc < 3)
+        return -EINVAL;
+    *path = argv[2];
+
+    if (argc < 4)
+        return -EINVAL;
+    *op_name = argv[3];
+
+    return 0;
+}
+
+int subcmd_device(int argc, char **argv)
+{
+    struct {
+        const char *name;
+        size_t size;
+        void (*op)(int argc, char **argv, EfwProto *proto, GError **error);
+    } *entry, entries[] = {
+    };
+    GError *error = NULL;
+    const char *path;
+    const char *op_name;
+    EfwProto *proto;
+    int err;
+    int i;
+
+    err = parse_args(argc, argv, &path, &op_name);
+    if (err < 0)
+        return print_help(0, NULL, NULL, NULL);
+
+    for (i = 0; i < G_N_ELEMENTS(entries); ++i) {
+        entry = entries + i;
+        if (strncmp(op_name, entry->name, entry->size) == 0)
+            break;
+    }
+    if (i == G_N_ELEMENTS(entries))
+        return print_help();
+
+    entry->op(argc, argv, proto, &error);
+
+    if (error != NULL) {
+        g_clear_error(&error);
+        return EXIT_FAILURE;
+    }
+
+    return EXIT_SUCCESS;
+}
diff --git a/efw-downloader/src/subcmds.h b/efw-downloader/src/subcmds.h
new file mode 100644
index 0000000..f10c420
--- /dev/null
+++ b/efw-downloader/src/subcmds.h
@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2020 Takashi Sakamoto
+#ifndef __SUBCMDS_H__
+#define __SUBCMDS_H__
+
+int subcmd_device(int argc, char **argv);
+
+#endif
-- 
2.25.1