如何在C中用GSubprocess检索实时输出？

#include <glib.h>
#include <glib/gstdio.h>

// 编译时链接 glib-2.0 和 gobject-2.0 库
// gcc -o program program.c `pkg-config --cflags --libs glib-2.0 gobject-2.0`

GSubprocess *subprocess;
GError *error = NULL;
GIOChannel *stdout_channel;

// 创建子进程
subprocess = g_subprocess_new(G_SUBPROCESS_FLAGS_STDOUT_PIPE, &error);
if (error != NULL) {
    g_printerr("Failed to create subprocess: %s\n", error->message);
    g_error_free(error);
    return;
}

// 设置管道用于实时输出的读取
stdout_channel = g_subprocess_get_stdout_pipe(subprocess);

gchar *line;
gsize length;

// 从管道中读取实时输出
while (g_io_channel_read_line(stdout_channel, &line, &length, NULL, NULL) == G_IO_STATUS_NORMAL) {
    // 处理每一行的输出
    g_print("Output: %s", line);

    // 释放内存
    g_free(line);
}

// 等待子进程结束
g_subprocess_wait_async(subprocess, NULL, NULL, NULL, (GAsyncReadyCallback)on_subprocess_exit, subprocess);

#include <glib.h>
#include <glib/gstdio.h>

static void on_subprocess_exit(GObject *source_object, GAsyncResult *res, gpointer user_data) {
    GSubprocess *subprocess = G_SUBPROCESS(source_object);
    GError *error = NULL;

    // 获取子进程退出状态
    gint exit_status = g_subprocess_wait_finish(subprocess, res, &error);
    if (error != NULL) {
        g_printerr("Failed to get subprocess exit status: %s\n", error->message);
        g_error_free(error);
        return;
    }

    g_print("Subprocess exited with status: %d\n", exit_status);

    // 释放子进程资源
    g_object_unref(subprocess);

    // 退出主循环
    g_main_loop_quit((GMainLoop *)user_data);
}

int main() {
    GSubprocess *subprocess;
    GError *error = NULL;
    GIOChannel *stdout_channel;
    gchar *line;
    gsize length;

    // 创建子进程
    subprocess = g_subprocess_new(G_SUBPROCESS_FLAGS_STDOUT_PIPE, &error);
    if (error != NULL) {
        g_printerr("Failed to create subprocess: %s\n", error->message);
        g_error_free(error);
        return 1;
    }

    // 设置管道用于实时输出的读取
    stdout_channel = g_subprocess_get_stdout_pipe(subprocess);

    // 从管道中读取实时输出
    while (g_io_channel_read_line(stdout_channel, &line, &length, NULL, NULL) == G_IO_STATUS_NORMAL) {
        // 处理每一行的输出
        g_print("Output: %s", line);

        // 释放内存
        g_free(line);
    }

    // 等待子进程结束
    g_subprocess_wait_async(subprocess, NULL, NULL, NULL, (GAsyncReadyCallback)on_subprocess_exit, subprocess);

    // 创建主循环并运行
    GMainLoop *loop = g_main_loop_new(NULL, FALSE);
    g_main_loop_run(loop);

    // 释放主循环资源
    g_main_loop_unref(loop);

    return 0;
}