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libdigiapix: add udev rules for digiapix API 

These udev rules allow to use the digiapix API by a normal user that
belongs to the 'digiapix' group.

https://jira.digi.com/browse/DEL-5232

Signed-off-by: Javier Viguera <javier.viguera@digi.com>
This commit is contained in:
Javier Viguera 2017-11-27 13:56:43 +01:00
parent 1104e5737f
commit a45357940a
3 changed files with 61 additions and 1 deletions
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22
meta-digi-dey/recipes-digi/libdigiapix/libdigiapix-git/99-digiapix.rules Normal file
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@ -0,0 +1,22 @@
# libdigiapix: configure interfaces so they can be used by group 'digiapix'
SUBSYSTEM=="i2c-dev", GROUP="digiapix", MODE="0660"
SUBSYSTEM=="spidev", GROUP="digiapix", MODE="0660"
#
# Use two different rules for GPIO's.
#
# 1. The first rule (gpiochip0) allows to configure the GROUP and MODE of
# the 'export' and 'unexport' files. This is basically executed once on
# boot and it's needed so a normal user (with group 'digiapix')
# is able to export/unexport gpios.
#
# 2. The second rule configures the GROUP and MODE of the sysfs files that
# are created whenever a 'gpio' is exported.
#
# This way we filter out multiple gpiochipX events that we don't want to attend
#
SUBSYSTEM=="gpio", KERNEL=="gpiochip0", ACTION=="add", RUN="/etc/udev/scripts/digiapix.sh"
SUBSYSTEM=="gpio", KERNEL!="gpiochip*", ACTION=="add", RUN="/etc/udev/scripts/digiapix.sh"
SUBSYSTEM=="pwm", ACTION=="add", RUN="/etc/udev/scripts/digiapix.sh"

31
meta-digi-dey/recipes-digi/libdigiapix/libdigiapix-git/digiapix.sh Normal file
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@ -0,0 +1,31 @@
#!/bin/sh
#
# Copyright (c) 2017, Digi International Inc.
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, you can obtain one at http://mozilla.org/MPL/2.0/.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#
if basename "${DEVPATH}" | grep -qs "gpiochip0$"; then
# Use 'gpiochip0' event to set group and mode for 'export/unexport' files
chown root:digiapix /sys/class/gpio/export /sys/class/gpio/unexport
chmod g+w /sys/class/gpio/export /sys/class/gpio/unexport
elif basename "${DEVPATH}" | grep -qs "pwmchip[0-9]\+$"; then
# Set group and mode for pwmchip's 'export/unexport' files
chown root:digiapix /sys${DEVPATH}/export /sys${DEVPATH}/unexport
chmod g+w /sys${DEVPATH}/export /sys${DEVPATH}/unexport
else
# Change group and mode of the sysfs files created whenever a 'gpioX'
# or 'pwmX' is exported
chown -h root:digiapix /sys${DEVPATH}/*
chmod g+w /sys${DEVPATH}/*
fi

9
meta-digi-dey/recipes-digi/libdigiapix/libdigiapix_git.bb
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@ -18,7 +18,9 @@ LIBDIGIAPIX_GIT_URI ?= "${@base_conditional('DIGI_INTERNAL_GIT', '1' , '${LIBDIG
SRC_URI = " \
${LIBDIGIAPIX_GIT_URI};branch=${SRCBRANCH} \
file://99-digiapix.rules \
file://board.conf \
file://digiapix.sh \
"
S = "${WORKDIR}/git"
@ -28,7 +30,12 @@ inherit pkgconfig useradd
do_install() {
oe_runmake 'DESTDIR=${D}' install
install -d ${D}${sysconfdir}/
# Install udev rules for digiapix
install -d ${D}${sysconfdir}/udev/rules.d ${D}${sysconfdir}/udev/scripts
install -m 0644 ${WORKDIR}/99-digiapix.rules ${D}${sysconfdir}/udev/rules.d/
install -m 0755 ${WORKDIR}/digiapix.sh ${D}${sysconfdir}/udev/scripts/
# Install board config file
install -m 0644 ${WORKDIR}/board.conf ${D}${sysconfdir}/libdigiapix.conf
}