1 files changed, 76 insertions, 0 deletions
diff --git a/platform/src/system.cpp b/platform/src/system.cpp
new file mode 100644
index 0000000..7cbdf0e
--- /dev/null
+++ b/platform/src/system.cpp
@@ -0,0 +1,76 @@
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdlib.h>
+
+#include "log.h"
+
+int run_daemon(void)
+{
+    int fd;
+
+    switch (fork())
+    {
+    // 失败
+    case -1:
+        LOG_ERROR("Failed at fork(), %d: %s", errno, strerror(errno));
+        return -1;
+    // 子进程
+    case 0:
+        break;
+    // 父进程
+    default:
+        exit(0);
+    }
+
+    if (setsid() == -1)
+    {
+        LOG_ERROR("Failed at setsid(), %d: %s", errno, strerror(errno));
+        return -1;
+    }
+
+    umask(0);
+
+    // 以读写模式打开 /dev/null
+    fd = open("/dev/null", O_RDWR);
+    if (fd == -1)
+    {
+        LOG_ERROR("Failed at open(/dev/null), %d: %s", errno, strerror(errno));
+        return -1;
+    }
+
+    // 将标准输入关联到 /dev/null
+    if (dup2(fd, STDIN_FILENO) == -1)
+    {
+        LOG_ERROR("Failed at dup2(STDIN_FILENO), %d: %s", errno, strerror(errno));
+        return -1;
+    }
+
+    // 将标准输出关联到 /dev/null
+    if (dup2(fd, STDOUT_FILENO) == -1)
+    {
+        LOG_ERROR("Failed at dup2(STDOUT_FILENO), %d: %s", errno, strerror(errno));
+        return -1;
+    }
+
+    // 将标准错误关联到 /dev/null
+    if (dup2(fd, STDERR_FILENO) == -1)
+    {
+        LOG_ERROR("Failed at dup2(STDERR_FILENO), %d: %s", errno, strerror(errno));
+        return -1;
+    }
+
+    // 关闭 /dev/null 的文件句柄
+    if (fd > STDERR_FILENO)
+    {
+        if (close(fd) == -1)
+        {
+            LOG_ERROR("Failed at close(), %d: %s", errno, strerror(errno));
+            return -1;
+        }
+    }
+
+    return 0;
+}
+\ No newline at end of file