code: plan9front

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aux/acpi: -H is for HALT

add -H option for acpi that halts immediately,
skipping enumeration of the battery, temperature, etc.

--- a/sys/man/8/acpi

+++ b/sys/man/8/acpi

@@ -7,6 +7,9 @@

 .PP

 .B aux/acpi

 [

+.B -H

+]

+[

 .B -m

 .I mountpoint

 ]

@@ -27,6 +30,12 @@

 .BI /srv/ service 

 as well.

 .PP

+With the

+.B -H

+option,

+.I aux/acpi

+will turn off the power immediately.

+.PP

 The directory contains the following files.

 .TP

 .B battery

@@ -57,7 +66,7 @@

 .SH SOURCE

 .B /sys/src/cmd/aux/acpi.c

 .SH SEE ALSO

-.IR imx8pm (8)

+.IR reform (1)

 .SH BUGS

 ACPI itself.

 .SH HISTORY

--- a/sys/src/cmd/aux/acpi.c

+++ b/sys/src/cmd/aux/acpi.c

@@ -293,7 +293,7 @@

 	(*io->write)(io, b, 1<<(wid-1), addr);

 }

-static void

+static int

 poweroff(void)

 {

 	int n;

@@ -302,7 +302,7 @@

 	if(facp.ok == 0){

 		werrstr("no FACP");

-		return;

+		return -1;

 	}

 	wirecpu0();

@@ -362,6 +362,7 @@

 	sleep(100);

 	werrstr("acpi failed");

+	return -1;

 }

 static void

@@ -420,7 +421,7 @@

 static void

 usage(void)

 {

-	fprint(2, "usage: aux/acpi [-Dp] [-m mountpoint] [-s service]\n");

+	fprint(2, "usage: aux/acpi [-DHp] [-m mountpoint] [-s service]\n");

 	exits("usage");

 }

@@ -436,11 +437,12 @@

 {

 	char *mtpt, *srv;

 	void *r, **rr;

-	int fd, n, l;

+	int fd, n, l, halt;

 	Tbl *t;

 	mtpt = "/dev";

 	srv = nil;

+	halt = 0;

 	ARGBEGIN{

 	case 'D':

 		chatty9p = 1;

@@ -454,6 +456,9 @@

 	case 'p':

 		amldebug++;

 		break;

+	case 'H':

+		halt = 1;

+		break;

 	default:

 		usage();

 	}ARGEND

@@ -549,6 +554,9 @@

 		facp.slpb = amlint(rr[1]);

 	}

 	close(fd);

+

+	if(halt && poweroff() < 0)

+		sysfatal("%r");

 	amlenum(amlroot, "_HID", enumec, nil);

 	amlenum(amlroot, "_BIF", enumbat, nil);