src/etc/rc.suspend, branch releng/10.4

Revert r211288 and move the logic to the acpi_timer itself.

2012-02-08T20:31:42Z

Consistently use full pathnames for external commands.

2010-08-13T21:23:13Z

Do not fork a subshell unnecessarily.

2010-08-13T21:04:43Z

Enforce ACPI timer as the timecounter hardware before we change sleep state

2010-08-13T20:43:19Z

unless it is the current timer. When we have resumed successfully, restore the previous timecounter hardware if it was changed earlier. Only the ACPI timer is guaranteed to increase monotonically between S-state changes.

With uart(4) default, change sio# to uart# so that

2008-07-19T20:12:33Z

out-of-the-box FreeBSD is consistent.

Update the suspend/resume user API while maintaining backwards compat.

2007-06-21T22:50:37Z

Improvements: * /etc/rc.suspend,rc.resume are always run, no matter the source of the suspend request (user or kernel, apm or acpi) * suspend now requires positive user acknowledgement. If a user program wants to cancel the suspend, they can. If one of the user programs hangs or doesn't respond within 10 seconds, the system suspends anyway. * /dev/apm is clonable, allowing multiple listeners for suspend events. In the future, xorg-server can use this to be informed about suspend even if there are other listeners (i.e. apmd). Changes: * Two new ACPI ioctls: REQSLPSTATE and ACKSLPSTATE. Request begins the process of suspending by notifying all listeners. acpi is monitored by devd(8) and /dev/apm listener(s) are also counted. Users register their approval or disapproval via Ack. If anyone disapproves, suspend is vetoed. * Old user programs or kernel modules that used SETSLPSTATE continue to work. A message is printed once that this interface is deprecated. * acpiconf gains the -k flag to ack the suspend request. This flag is undocumented on purpose since it's only used by /etc/rc.suspend. It is not intended to be a permanent change and will be removed once a better power API is implemented. * S5 (power off) is no longer supported via acpiconf -s 5 or apm -z/-Z. This restores previous behavior of halt/shutdown -p being the interface. * Miscellaneous improvements to error reporting Approved by: re

Make sure pid file creation doesn't complain if it can't create the file.

2004-01-21T03:03:40Z

This removes a warning message when suspending is called by a non-root user.

Add support for /etc/rc.suspend and /etc/rc.resume for ACPI. They are

2003-12-30T17:28:06Z

called directly from acpiconf(8). Change both scripts to take a subsystem (apm|acpi) and sleep level (suspend,standby|1-5) argument.

Add copyright notices. Other systems have been barrowing our /etc files

2000-10-08T19:20:36Z

w/o giving any credit.

Apply a consistent style to most of the etc scripts. Particularly, use

1999-09-13T15:44:20Z

case instead of test where appropriate, since case allows case is a sh builtin and (as a side-effect) allows case-insensitivity. Changes discussed on freebsd-hackers. Submitted by: Doug Barton