From 13db998806c11c1ee13c750abfce62b98f5953f7 Mon Sep 17 00:00:00 2001
From: takawata <takawata@FreeBSD.org>
Date: Sat, 15 Feb 2003 01:46:22 +0000
Subject: Allow non-privilaged user to retrive battery or AC line information.

Reviewed by: rwatson
---
 sys/dev/acpica/acpi.c         | 12 +++++++++++-
 sys/dev/acpica/acpi_acad.c    |  5 +++++
 sys/dev/acpica/acpi_battery.c |  6 ++++++
 sys/dev/acpica/acpi_cmbat.c   |  5 +++++
 4 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/sys/dev/acpica/acpi.c b/sys/dev/acpica/acpi.c
index 44ebe3d..9da9e6d 100644
--- a/sys/dev/acpica/acpi.c
+++ b/sys/dev/acpica/acpi.c
@@ -33,6 +33,7 @@
 #include <sys/param.h>
 #include <sys/kernel.h>
 #include <sys/proc.h>
+#include <sys/fcntl.h>
 #include <sys/malloc.h>
 #include <sys/bus.h>
 #include <sys/conf.h>
@@ -487,7 +488,7 @@ acpi_attach(device_t dev)
     /*
      * Create the control device
      */
-    sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600,
+    sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644,
 	"acpi");
     sc->acpi_dev_t->si_drv1 = sc;
 
@@ -1844,6 +1845,15 @@ acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td)
     }
 
     /*
+     * Core ioctls are  not permitted for non-writable user.
+     * Currently, other ioctls just fetch information.
+     * Not changing system behavior.
+     */
+    if(!(flag & FWRITE)){
+	    return EPERM;
+    }
+
+    /*
      * Core system ioctls.
      */
     switch (cmd) {
diff --git a/sys/dev/acpica/acpi_acad.c b/sys/dev/acpica/acpi_acad.c
index d7e8ebd..09bb149 100644
--- a/sys/dev/acpica/acpi_acad.c
+++ b/sys/dev/acpica/acpi_acad.c
@@ -195,6 +195,11 @@ acpi_acad_ioctl(u_long cmd, caddr_t addr, void *arg)
 		return(ENXIO);
 	}
 
+        /*
+         * No security check required: information retrieval only.  If
+         * new functions are added here, a check might be required.
+         */
+
 	switch (cmd) {
 	case ACPIIO_ACAD_GET_STATUS:
 		acpi_acad_get_status(dev);
diff --git a/sys/dev/acpica/acpi_battery.c b/sys/dev/acpica/acpi_battery.c
index 329d64a..e26aee1 100644
--- a/sys/dev/acpica/acpi_battery.c
+++ b/sys/dev/acpica/acpi_battery.c
@@ -138,6 +138,12 @@ acpi_battery_ioctl(u_long cmd, caddr_t addr, void *arg)
 
 	ioctl_arg = (union acpi_battery_ioctl_arg *)addr;
 	error = 0;
+
+	/*
+         * No security check required: information retrieval only.  If
+         * new functions are added here, a check might be required.
+         */
+
 	switch (cmd) {
 	case ACPIIO_BATT_GET_UNITS:
 		*(int *)addr = acpi_battery_get_units();
diff --git a/sys/dev/acpica/acpi_cmbat.c b/sys/dev/acpica/acpi_cmbat.c
index 804614c..1cfd584 100644
--- a/sys/dev/acpica/acpi_cmbat.c
+++ b/sys/dev/acpica/acpi_cmbat.c
@@ -405,6 +405,11 @@ acpi_cmbat_ioctl(u_long cmd, caddr_t addr, void *arg)
 		return (ENXIO);
 	}
 
+        /*
+         * No security check required: information retrieval only.  If
+         * new functions are added here, a check might be required.
+         */
+	
 	switch (cmd) {
 	case ACPIIO_CMBAT_GET_BIF:
 		acpi_cmbat_get_bif(dev);
-- 
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