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package sysfsutils: add support for sysfs settings at boot

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This patch is based on sysfsutils package's behaviour on Debian OS.

Signed-off-by: Rodolfo Giometti <giometti@linux.it>
This commit is contained in:
Rodolfo Giometti 2017-06-28 10:49:01 +02:00 committed by John Crispin
parent a436ef992d
commit 2437e0f670
4 changed files with 83 additions and 0 deletions
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12
package/libs/sysfsutils/Makefile
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@ -65,9 +65,21 @@ define Package/libsysfs/install
endef endef
define Package/sysfsutils/install 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 $(INSTALL_DIR) $(1)/usr/bin
$(CP) $(PKG_INSTALL_DIR)/usr/bin/systool $(1)/usr/bin/ $(CP) $(PKG_INSTALL_DIR)/usr/bin/systool $(1)/usr/bin/
endef endef
define Package/sysfsutils/conffiles
/etc/sysfs.conf
/etc/sysfs.d/local.conf
endef
$(eval $(call BuildPackage,libsysfs)) $(eval $(call BuildPackage,libsysfs))
$(eval $(call BuildPackage,sysfsutils)) $(eval $(call BuildPackage,sysfsutils))

1
package/libs/sysfsutils/files/local.conf Normal file
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@ -0,0 +1 @@
# local sysctl settings can be stored in this directory

22
package/libs/sysfsutils/files/sysfs.conf Normal file
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@ -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

48
package/libs/sysfsutils/files/sysfsutils Normal file
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@ -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
}