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Merge pull request #8198 from jefferyto/mini-snmpd-init

mini_snmpd: Update init script
lilik-openwrt-22.03
Rosen Penev 6 years ago
committed by GitHub
parent
commit
3d2b0e976c
No known key found for this signature in database GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 62 additions and 55 deletions
  1. +1
    -1
      net/mini_snmpd/Makefile
  2. +61
    -54
      net/mini_snmpd/files/mini_snmpd.init

+ 1
- 1
net/mini_snmpd/Makefile View File

@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
PKG_NAME:=mini_snmpd
PKG_VERSION:=1.4-rc1
PKG_RELEASE:=3
PKG_RELEASE:=4
PKG_MAINTAINER:=Marcin Jurkowski <marcin1j@gmail.com>
PKG_LICENSE:=GPL-2.0
PKG_LICENSE_FILES:=COPYING


+ 61
- 54
net/mini_snmpd/files/mini_snmpd.init View File

@ -8,22 +8,26 @@ USE_PROCD=1
PROG=/usr/bin/mini_snmpd
NAME=mini_snmpd
global_respawn_threshold=
global_respawn_timeout=
global_respawn_retry=
_log() {
logger -p daemon.info -t mini_snmpd "$@"
logger -p daemon.info -t mini_snmpd "$@"
}
_err() {
logger -p daemon.err -t mini_snmpd "$@"
logger -p daemon.err -t mini_snmpd "$@"
}
# mini_snmpd 1.3+ now starts later in the game. Expects filesystems monitored to be already mounted, or wont pass args to mini_snmpd
# mini_snmpd 1.3+ now starts later in the game. Expects filesystems monitored to be already mounted, or wont pass args to mini_snmpd
# and at least configuration entry for network physical interface defined in /etc/config/network
# It handles network interfaces not yet present (e.g. ppp) but will statfs() the root/wrong filesystem if device not mounted
# Tip: complex scripts run faster without in openwrt if you stop busybox forking and searching for applets. Faster bootups
# CONFIG_BUSYBOX_CONFIG_FEATURE_SH_NOFORK
# CONFIG_BUSYBOX_CONFIG_FEATURE_PREFER_APPLETS
# BUSYBOX_CONFIG_ASH_OPTIMIZE_FOR_SIZE [=n]
# CONFIG_BUSYBOX_CONFIG_FEATURE_PREFER_APPLETS
# BUSYBOX_CONFIG_ASH_OPTIMIZE_FOR_SIZE [=n]
# CONFIG_BUSYBOX_CONFIG_ASH_CMDCMD
mini_snmpd_validation="enabled:bool:0 \
@ -49,14 +53,14 @@ mini_snmpd_validation="enabled:bool:0 \
append_disk() {
local disk="$1" disk_count
[ -z $disk_count ] && disk_count=0
if grep -qF "$disk" /proc/mounts ; then
if grep -qF "$disk" /proc/mounts; then
# check the fileystem is mountpoint, and directory search permissions available for statfs()
# presence as a directory -d test done is already done by uci_validate_section()
[ -x "$disk" ] || {
_err "$cfg: mountpoint $disk for snmp monitoring EACCES error. Check permissions, ignoring"
return 1
}
if [ $disk_count -lt 4 ] ; then
if [ $disk_count -lt 4 ]; then
append disks_arg "$disk" ','
disk_count=$((disk_count++))
else
@ -72,15 +76,15 @@ append_interface() {
[ -z $netdev_count ] && netdev_count=0
# for the purposes of snmp monitoring it doesn't need to be up, it just needs to exist in /proc/net/dev
network_get_device netdev "$name"
if [ -n "$netdev" ] && grep -qF "$netdev" /proc/net/dev ]; then
if [ -n "$netdev" ] && grep -qF "$netdev" /proc/net/dev ]; then
[ $netdev_count -ge 4 ] && {
_err "$cfg: too many network interfaces configured, ignoring $name"
return
}
netdev_count=$((netdev_count++))
if [ -n "$interfaces_arg" ]; then
netdev_count=$((netdev_count++))
if [ -n "$interfaces_arg" ]; then
append interfaces_arg "$netdev" ','
else
else
append interfaces_arg "$netdev"
fi
else
@ -102,57 +106,50 @@ watch_interfaces() {
config_get listen_interface "$cfg" listen_interface
# If the interface is up & instance is running we'll watch at the instance level and only restart that instance if it's bound interface changes
# Regardless of ubus knowing about an interface (in the case it's not yet configured)
[ -n "$listen_interface" ] && trigger_interfaces="${listen_interface} ${trigger_interfaces} "
[ -n "$listen_interface" ] && trigger_interfaces="$listen_interface $trigger_interfaces"
# Restart daemon if one of monitored interfaces changes
config_get reload_interfaces "$cfg" interfaces
}
validate_mini_snmpd_section() {
# validate a mini_snmpd instance in uci config file mini_snmpd
# http://luci.subsignal.org/trac/wiki/Documentation/Datatypes ubox/validate/validate.c
uci_validate_section mini_snmpd mini_snmpd "${1}" $mini_snmpd_validation
uci_load_validate mini_snmpd mini_snmpd "$1" "$2" $mini_snmpd_validation
}
service_triggers() {
config_load 'mini_snmpd'
procd_open_trigger
procd_add_config_trigger "config.change" "mini_snmpd" /etc/init.d/mini_snmpd reload
config_foreach watch_interfaces 'mini_snmpd'
config_load 'mini_snmpd'
procd_open_trigger
procd_add_config_trigger "config.change" "mini_snmpd" /etc/init.d/mini_snmpd reload
config_foreach watch_interfaces 'mini_snmpd'
# this only watches interfaces for which there is no running instance due to interface down / not in ubus
# hence start not reload, this trigger will not affect running instances as another start will not change their procd command arguments
# or stop the already running process
[ -n "$trigger_interfaces" ] & {
for n in $trigger_interfaces ; do
[ -n "$trigger_interfaces" ] && {
for n in $trigger_interfaces; do
procd_add_interface_trigger "interface.*" $n /etc/init.d/mini_snmpd start
done
}
done
}
[ -n "$reload_interfaces" ] && {
for n in $reload_interfaces; do
procd_add_reload_interface_trigger $n
done
}
procd_close_trigger
procd_close_trigger
procd_add_validation validate_mini_snmpd_section
}
start_instance() {
local cfg validation_failed validation_err disks_arg interfaces_arg
cfg="$1"
#uci_validate_section should unset undefined variables from other instances
#however defining uci variables as local will scope them to this instance
#"local variables are also visible to functions called by the parent function" so it's good practice
local enabled ipv6 debug auth community contact location listen_interface \
udp_port tcp_port vendor_oid mib_timeout
local disks="" interfaces=""
validate_mini_snmpd_section "$cfg" 2>/dev/null || validation_failed=1
[ "$enabled" == 1 ] || {
_log "instance:$cfg disabled not starting"
cfg="$1"
[ "$2" = 0 ] || validation_failed=1
[ "$enabled" == 1 ] || {
_log "instance:$cfg disabled not starting"
return 1
}
local listen_interface_json listen_interface_ip listen_interface_device listen_interface_up
[ -n "$listen_interface" ] && {
if [ "$ipv6" = 1 ]; then
@ -168,11 +165,11 @@ start_instance() {
network_get_physdev listen_interface_device "$listen_interface"
}
[ $validation_failed ] && {
[ $validation_failed ] && {
_err "validation of $NAME configuration for $cfg instance failed, all tests should be within constraints"
_err "please edit the configuration values below using [l]uci "
validation_err=`/sbin/validate_data mini_snmpd mini_snmpd "$cfg" $mini_snmpd_validation 2>&1 | sed '/with\ false$/!d;s/validates\ as\ /needs\ to\ be\ /;s/with\ false//' `
_err "${validation_err}"
_err "$validation_err"
return 1
}
config_list_foreach "$cfg" 'disks' append_disk
@ -182,36 +179,47 @@ start_instance() {
_err "$cfg: you haven't sucessfully configured any mountpoints or disks for this instance, not starting"
return 1
}
[ -z "$respawn_threshold$respawn_timeout$respawn_retry" ] && {
respawn_threshold=$global_respawn_threshold
respawn_timeout=$global_respawn_timeout
respawn_retry=$global_respawn_retry
}
[ -z "$global_respawn_threshold$global_respawn_timeout$global_respawn_retry" ] && {
global_respawn_threshold=$respawn_threshold
global_respawn_timeout=$respawn_timeout
global_respawn_retry=$respawn_retry
}
procd_open_instance
procd_set_param command "$PROG" -n
procd_set_param stdout "1"
procd_set_param stdout "1"
procd_set_param stderr "1"
# don't the like default respawn values? you can override through uci.
# vars left as global so you only need to do it in the first mini_snmpd instance
# vars saved as global so you only need to do it in the first mini_snmpd instance
procd_set_param respawn ${respawn_threshold:-3600} ${respawn_timeout:-10} ${respawn_retry:-1}
# this monitors ubus changes
[ -n "$listen_interface" ] && {
#procd_open_trigger
#procd_add_interface_trigger "interface.*" $listen_interface /etc/init.d/mini_snmpd reload
#procd_add_interface_trigger "interface.*" $listen_interface /etc/init.d/mini_snmpd reload
#procd_close_trigger
procd_add_reload_interface_trigger $listen_interface #or use shorthand of above
}
# this re-starts the daemon if a properly configured network interface is changed whilst it is already running
# igmpproxy has this as well as "procd_set_param netdev"
append_arg "-c" "$community"
append_arg "-L" "${location}"
append_arg "-C" "${contact}"
append_arg "-p" $udp_port
append_arg "-P" $tcp_port
append_arg "-V" "${vendor_oid}"
append_arg "-t" $mib_timeout
[ "$ipv6" = 1 ] && procd_append_param command "-6"
# igmpproxy has this as well as "procd_set_param netdev"
append_arg "-c" "$community"
append_arg "-L" "$location"
append_arg "-C" "$contact"
append_arg "-p" $udp_port
append_arg "-P" $tcp_port
append_arg "-V" "$vendor_oid"
append_arg "-t" $mib_timeout
[ "$ipv6" = 1 ] && procd_append_param command "-6"
[ "$debug" = 1 ] && procd_append_param command "-v"
# uci_validate_section() aka /sbin/validate_data can only cast default values not defined in /etc/config/* to string
# uci_validate_section() aka /sbin/validate_data can only cast default values not defined in /etc/config/* to string
# e.g. ="1" however it sets bools defined in /etc/config/* to =1 / =0
[ "$auth" = 1 -o "$auth" = "1" ] && procd_append_param command "-a"
[ -n "$disks_arg" ] && procd_append_param command "-d" "$disks_arg"
@ -232,6 +240,5 @@ start_service() {
. /lib/functions/network.sh
config_load 'mini_snmpd'
config_foreach start_instance 'mini_snmpd'
config_foreach validate_mini_snmpd_section 'mini_snmpd' start_instance
}

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