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| author | Dees Troy <dees_troy@teamw.in> | 2013-02-27 19:39:14 +0100 |
|---|---|---|
| committer | Gerrit Code Review <gerrit@5.9.244.119> | 2013-02-27 19:39:14 +0100 |
| commit | 2cf31af56114cf997b10218db7c35ee047f5d400 (patch) | |
| tree | 85f3b51e45ff8233922f2c0c151299868ca89371 /libblkid/linux_reboot.h | |
| parent | libtar - Fix extraction of hardlinks to use the prefix (diff) | |
| parent | use libblkid to get filesystem type (diff) | |
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Diffstat (limited to 'libblkid/linux_reboot.h')
| -rw-r--r-- | libblkid/linux_reboot.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/libblkid/linux_reboot.h b/libblkid/linux_reboot.h new file mode 100644 index 000000000..9cebc67e8 --- /dev/null +++ b/libblkid/linux_reboot.h @@ -0,0 +1,72 @@ +#ifndef _LINUX_REBOOT_H +#define _LINUX_REBOOT_H + +/* + * Magic values required to use _reboot() system call. + */ + +#define LINUX_REBOOT_MAGIC1 0xfee1dead +#define LINUX_REBOOT_MAGIC2 672274793 +#define LINUX_REBOOT_MAGIC2A 85072278 +#define LINUX_REBOOT_MAGIC2B 369367448 + + +/* + * Commands accepted by the _reboot() system call. + * + * RESTART Restart system using default command and mode. + * HALT Stop OS and give system control to ROM monitor, if any. + * CAD_ON Ctrl-Alt-Del sequence causes RESTART command. + * CAD_OFF Ctrl-Alt-Del sequence sends SIGINT to init task. + * POWER_OFF Stop OS and remove all power from system, if possible. + * RESTART2 Restart system using given command string. + */ + +#define LINUX_REBOOT_CMD_RESTART 0x01234567 +#define LINUX_REBOOT_CMD_HALT 0xCDEF0123 +#define LINUX_REBOOT_CMD_CAD_ON 0x89ABCDEF +#define LINUX_REBOOT_CMD_CAD_OFF 0x00000000 +#define LINUX_REBOOT_CMD_POWER_OFF 0x4321FEDC +#define LINUX_REBOOT_CMD_RESTART2 0xA1B2C3D4 + +/* Including <unistd.h> makes sure that on a glibc system + <features.h> is included, which again defines __GLIBC__ */ +#include <unistd.h> +#include "linux_reboot.h" + +#define USE_LIBC + +#ifdef USE_LIBC + +/* libc version */ +#if defined __GLIBC__ && __GLIBC__ >= 2 +# include <sys/reboot.h> +# define REBOOT(cmd) reboot(cmd) +#else +extern int reboot(int, int, int); +# define REBOOT(cmd) reboot(LINUX_REBOOT_MAGIC1,LINUX_REBOOT_MAGIC2,(cmd)) +#endif +static inline int my_reboot(int cmd) { + return REBOOT(cmd); +} + +#else /* no USE_LIBC */ + +/* direct syscall version */ +#include <linux/unistd.h> + +#ifdef _syscall3 +_syscall3(int, reboot, int, magic, int, magic_too, int, cmd); +#else +/* Let us hope we have a 3-argument reboot here */ +extern int reboot(int, int, int); +#endif + +static inline int my_reboot(int cmd) { + return reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, cmd); +} + +#endif + + +#endif /* _LINUX_REBOOT_H */ |