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authorbigbiff bigbiff <bigbiff@teamw.in>2013-02-23 02:55:50 +0100
committerbigbiff bigbiff <bigbiff@teamw.in>2013-02-25 15:06:46 +0100
commite60683a0d553b6488c564863f4e48954944fb0f8 (patch)
tree9364f97cb88b7c1359f5f06dfb32150a78168c31 /libblkid/linux_reboot.h
parentFix building of updater for 4.2 environment (diff)
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Diffstat (limited to 'libblkid/linux_reboot.h')
-rw-r--r--libblkid/linux_reboot.h72
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 */