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init,halt: portability improvements

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* make init and halt use the same RB_* constants for reboot()
* conditionalize the Linux-specific code

Inspired by init.init.diff from the Debian kFreeBSD patches at:
http://svn.debian.org/viewsvn/d-i/people/slackydeb/kfreebsd/busybox/1.14/debian

Signed-off-by: Jeremie Koenig <jk@jk.fr.eu.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Jeremie Koenig
2010-05-27 15:38:44 +02:00
committed by Denys Vlasenko
parent f812eace18
commit 714674e4da
4 changed files with 40 additions and 23 deletions
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31
init/reboot.h Normal file
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@ -0,0 +1,31 @@
/*
* Definitions related to the reboot() system call,
* shared between init.c and halt.c.
*/
#include <sys/reboot.h>
#ifndef RB_HALT_SYSTEM
# if defined(__linux__)
# define RB_HALT_SYSTEM 0xcdef0123
# define RB_ENABLE_CAD 0x89abcdef
# define RB_DISABLE_CAD 0
# define RB_POWER_OFF 0x4321fedc
# define RB_AUTOBOOT 0x01234567
# elif defined(RB_HALT)
# define RB_HALT_SYSTEM RB_HALT
# endif
#endif
/* Stop system and switch power off if possible. */
#ifndef RB_POWER_OFF
# if defined(RB_POWERDOWN)
# define RB_POWER_OFF RB_POWERDOWN
# elif defined(__linux__)
# define RB_POWER_OFF 0x4321fedc
# else
# warning "poweroff unsupported, using halt as fallback"
# define RB_POWER_OFF RB_HALT_SYSTEM
# endif
#endif