In this tutorial, we will learn how to shut down and reboot our Linux system from the command line terminal, without the need to physically press the power button or use a GUI. Note that some systems will requir
C. 将cmdline存放至saved_command_line中 //在setup_arch函数刚开始就定义了char *from= default_command_line,因此通过下面这个函数实现把cmdline存放至saved_command_line中。 memcpy(saved_command_line, from, COMMAND_LINE_SIZE); D. 对cmdline做简单的 分析,主要是mem和initrd的 这里的处理和B步比较类似,通...
LINUX_REBOOT_MAGIC1 (that is, 0xfee1dead) and magic2 equals LINUX_REBOOT_MAGIC2 (that is, 672274793). However, since 2.1.17 also LINUX_REBOOT_MAGIC2A (that is, 85072278) and since 2.1.97 also LINUX_REBOOT_MAGIC2B (that is, 369367448) and since 2.5.71 also LINUX_REBOOT_MAGIC2C (...
LINUX_REBOOT_MAGIC2 (that is, 672274793). However, since 2.1.17 also LINUX_REBOOT_MAGIC2A (that is, 85072278) and since 2.1.97 also LINUX_REBOOT_MAGIC2B (that is, 369367448) and since 2.5.71 also LINUX_REBOOT_MAGIC2C (that is, 537993216) are permitted as value for magic2. (The h...
分类：linux应用程序开发和工具使用等 linux下c程序调用reboot函数实现直接重启 当然你也可以直接调用system("reboot"),但是这里完全基于库函数来实现,不依赖于/sbin/reboot这个外部程序 这里reboot()的其他命令,比如RB_POWER_OFF,并不能保证关闭计算机电源. #include<unistd.h> #include<sys/reboot.h> intmain()...
LINUX_REBOOT_CMD_POWER_OFF (0x4321fedc; since 2.1.30). The message "Power down." is printed, the system is stopped, and all power is removed from the system, if possible. If not preceded by a sync(2), data will be lost.
printed, the system is stopped, and all power is removed from the system, if possible. If not preceded by a sync(2), data will be lost. LINUX_REBOOT_CMD_RESTART2 (0xa1b2c3d4; since 2.1.30). The message "Restarting system with command '%s'" is printed, and a restart (using the...
case LINUX_REBOOT_CMD_RESTART2: if (strncpy_from_user(&buffer[0], arg,sizeof(buffer) - 1) < 0) { unlock_kernel(); return -EFAULT; } buffer[sizeof(buffer) - 1] ='\0'; kernel_restart(buffer); break; #ifdef CONFIG_KEXEC
In this tutorial, we’ll learn some useful commands to reboot and shut down a Linux system from the command line. 2. Rebooting or Shutting Down a System Several commands can reboot or shut down a system, such asshutdown,reboot,halt,andpoweroff. ...
case LINUX_REBOOT_CMD_RESTART2: // 重启 ret = strncpy_from_user(&buffer[0], arg, sizeof(buffer) - 1); if (ret < 0) { ret = -EFAULT; break; } buffer[sizeof(buffer) - 1] = '\0'; kernel_restart(buffer); break; ... } 内核通过...