package sysfsutils: add support for sysfs settings at boot
authorRodolfo Giometti <giometti@linux.it>
Wed, 28 Jun 2017 08:49:01 +0000 (10:49 +0200)
committerJo-Philipp Wich <jo@mein.io>
Tue, 18 Dec 2018 06:55:45 +0000 (07:55 +0100)
This patch is based on sysfsutils package's behaviour on Debian OS.

Signed-off-by: Rodolfo Giometti <giometti@linux.it>
(backported from 2437e0f67050cad79cc1778b18cefd8d3cd86d07)

package/libs/sysfsutils/Makefile
package/libs/sysfsutils/files/local.conf [new file with mode: 0644]
package/libs/sysfsutils/files/sysfs.conf [new file with mode: 0644]
package/libs/sysfsutils/files/sysfsutils [new file with mode: 0644]

index 6265442..60275ec 100644 (file)
@@ -65,9 +65,21 @@ define Package/libsysfs/install
 endef
 
 define Package/sysfsutils/install
+       $(INSTALL_DIR) $(1)/etc/init.d
+       $(INSTALL_BIN) ./files/sysfsutils $(1)/etc/init.d/
+
+       $(INSTALL_DATA) ./files/sysfs.conf $(1)/etc/
+       $(INSTALL_DIR) $(1)/etc/sysfs.d
+       $(INSTALL_DATA) ./files/local.conf $(1)/etc/sysfs.d/
+
        $(INSTALL_DIR) $(1)/usr/bin
        $(CP) $(PKG_INSTALL_DIR)/usr/bin/systool $(1)/usr/bin/
 endef
 
+define Package/sysfsutils/conffiles
+/etc/sysfs.conf
+/etc/sysfs.d/local.conf
+endef
+
 $(eval $(call BuildPackage,libsysfs))
 $(eval $(call BuildPackage,sysfsutils))
diff --git a/package/libs/sysfsutils/files/local.conf b/package/libs/sysfsutils/files/local.conf
new file mode 100644 (file)
index 0000000..891da73
--- /dev/null
@@ -0,0 +1 @@
+# local sysctl settings can be stored in this directory
diff --git a/package/libs/sysfsutils/files/sysfs.conf b/package/libs/sysfsutils/files/sysfs.conf
new file mode 100644 (file)
index 0000000..f032462
--- /dev/null
@@ -0,0 +1,22 @@
+#
+# /etc/sysfs.conf - Configuration file for setting sysfs attributes.
+#
+# The sysfs mount directory is automatically prepended to the attribute paths.
+#
+# Syntax:
+# attribute = value
+# mode attribute = 0600 # (any valid argument for chmod)
+# owner attribute = root:wheel # (any valid argument for chown)
+#
+# Examples:
+#
+# Always use the powersave CPU frequency governor
+# devices/system/cpu/cpu0/cpufreq/scaling_governor = powersave
+#
+# Use userspace CPU frequency governor and set initial speed
+# devices/system/cpu/cpu0/cpufreq/scaling_governor = userspace
+# devices/system/cpu/cpu0/cpufreq/scaling_setspeed = 600000
+#
+# Set permissions of suspend control file
+# mode power/state = 0660
+# owner power/state = root:power
diff --git a/package/libs/sysfsutils/files/sysfsutils b/package/libs/sysfsutils/files/sysfsutils
new file mode 100644 (file)
index 0000000..0305ca8
--- /dev/null
@@ -0,0 +1,48 @@
+#!/bin/sh /etc/rc.common
+# Copyright (C) 2017 Rodolfo Giometti <giometti@enneenne.com>
+#
+# Based on Debian's script /etc/init.d/sysfsutils by
+# Martin Pitt <mpitt@debian.org>
+
+load_conffile() {
+       FILE="$1"
+       sed  's/#.*$//; /^[[:space:]]*$/d;
+         s/^[[:space:]]*\([^=[:space:]]*\)[[:space:]]*\([^=[:space:]]*\)[[:space:]]*=[[:space:]]*\(.*\)/\1 \2 \3/' \
+         $FILE | {
+       while read f1 f2 f3; do
+               if [ "$f1" = "mode" -a -n "$f2" -a -n "$f3" ]; then
+                       if [ -f "/sys/$f2" ] || [ -d "/sys/$f2" ]; then
+                               chmod "$f3" "/sys/$f2"
+                       else
+                               echo "unknown attribute $f2"
+                       fi
+               elif [ "$f1" = "owner" -a -n "$f2" -a -n "$f3" ]; then
+                       if [ -f "/sys/$f2" ]; then
+                               chown "$f3" "/sys/$f2"
+                       else
+                               echo "unknown attribute $f2"
+                       fi
+               elif [ "$f1" -a -n "$f2" -a -z "$f3" ]; then
+                       if [ -f "/sys/$f1" ]; then
+                               # Some fields need a terminating newline, others
+                               # need the terminating newline to be absent :-(
+                               echo -n "$f2" > "/sys/$f1" 2>/dev/null ||
+                                       echo "$f2" > "/sys/$f1"
+                       else
+                               echo "unknown attribute $f1"
+                       fi
+               else
+                       echo "syntax error in $CONFFILE: '$f1' '$f2' '$f3'"
+                       exit 1
+               fi
+       done
+       }
+}
+
+START=11
+start() {
+       for file in /etc/sysfs.conf /etc/sysfs.d/*.conf; do
+               [ -r "$file" ] || continue
+               load_conffile "$file"
+       done
+}