嵌入式系统关机/Embeded System PowerOff HowTo?

REFER: 嵌入式Linux实现关机命令
REFER: Embedded File System and power-off
REFER: kernel/reboot.c
REFER: PowerOff

REFER: Manual Reference Pages - REBOOT (2)

可以通过调用reboot(RB_POWER_OFF) （其中，RB_POWER_OFF是 宏/Maco-Define）来实现 关机/poweroff。函数reboot的 原型/decline在 <sys/reboot.h>。

SYNOPSIS/函数原型
/* For libc4 and libc5 the library call and the system call
are identical, and since kernel version 2.1.30 there are
symbolic names LINUX_REBOOT_* for the constants and a
fourth argument to the call: */

#include <unistd.h>
#include <linux/reboot.h>

int reboot(int magic, int magic2, int cmd, void *arg);

/* Under glibc some of the constants involved have gotten
symbolic names RB_*, and the library call is a 1-argument
wrapper around the 3-argument system call: */

#include <unistd.h>
#include <sys/reboot.h>

int reboot(int cmd); 

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