mirror of https://github.com/limosek/zaf.git
330 lines
8.8 KiB
Bash
330 lines
8.8 KiB
Bash
# Control file related functions
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# Get item list from control on stdin
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zaf_ctrl_get_items() {
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grep '^Item ' | cut -d ' ' -f 2 | cut -d ':' -f 1 | tr '\r\n' ' '
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}
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# Get external item list from control on stdin
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zaf_ctrl_get_extitems() {
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grep '^ExtItem ' | cut -d ' ' -f 2 | cut -d ':' -f 1 | tr '\r\n' ' '
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}
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# Get external item body from stdin
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# $1 itemname
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zaf_ctrl_get_extitem_block() {
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grep -v '^#' | awk '/^ExtItem '$1'/ { i=0;
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while (i==0) {
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getline;
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if (/^\/ExtItem/) exit;
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print $0;
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}};
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END {
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exit i==0;
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}'
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}
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# Get item body from stdin
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# $1 itemname
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zaf_ctrl_get_item_block() {
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grep -v '^#' | awk '/^Item '$1'/ { i=0;
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while (i==0) {
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getline;
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if (/^\/Item/) exit;
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print $0;
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}};
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END {
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exit i==0;
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}'
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}
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# Get global plugin block body from stdin
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# $1 itemname
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zaf_ctrl_get_global_block() {
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grep -v '^#' | awk '{ i=0; print $0;
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while (i==0) {
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getline;
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if (/^(Item |ExtItem)/) exit;
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print $0;
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}}'
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}
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# Get item multiline option
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# $1 optionname
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zaf_block_get_moption() {
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awk '/^'$1'::$/ { i=0;
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while (i==0) {
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getline;
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if (/^::$/) {i=1; continue;};
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print $0;
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}};
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END {
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exit i==0;
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}
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'
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}
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# Get item singleline option from config block on stdin
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# $1 optionname
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zaf_block_get_option() {
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grep "^$1:" | cut -d ' ' -f 2- | tr -d '\r\n'
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}
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# Get global option (single or multiline)
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# $1 - control file
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# $2 - option name
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zaf_ctrl_get_global_option() {
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local ctrlvar
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local ctrlopt
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ctrlopt="ZAF_CTRL_$(zaf_stripctrl $2)"
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eval ctrlvar=\$$ctrlopt
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if [ -n "$ctrlvar" ]; then
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zaf_dbg "Overriding control field $2 from env $ctrlopt($ctrlvar)"
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echo $ctrlopt
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else
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zaf_ctrl_get_global_block <$1 | zaf_block_get_moption "$2" \
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|| zaf_ctrl_get_global_block <$1 | zaf_block_get_option "$2"
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fi
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}
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# Get item specific option (single or multiline)
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# $1 - control file
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# $2 - item name
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# $3 - option name
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zaf_ctrl_get_item_option() {
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local ctrlvar
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local ctrlopt
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ctrlopt="ZAF_CTRLI_$(zaf_stripctrl $2)_$(zaf_stripctrl $3)"
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eval ctrlvar=\$$ctrlopt
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if [ -n "$ctrlvar" ]; then
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zaf_dbg "Overriding item control field $2/$3 from env $ctrlopt($ctrlvar)"
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echo $ctrlopt
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else
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zaf_ctrl_get_item_block <$1 "$2" | zaf_block_get_moption "$3" \
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|| zaf_ctrl_get_item_block <$1 "$2" | zaf_block_get_option "$3"
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fi
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}
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# Get external item specific option (single or multiline)
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# $1 - control file
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# $2 - item name
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# $3 - option name
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zaf_ctrl_get_extitem_option() {
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local ctrlvar
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local ctrlopt
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ctrlopt="ZAF_CTRLI_$(zaf_stripctrl $2)_$(zaf_stripctrl $3)"
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eval ctrlvar=\$$ctrlopt
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if [ -n "$ctrlvar" ]; then
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zaf_dbg "Overriding item control field $2/$3 from env $ctrlopt($ctrlvar)"
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echo $ctrlopt
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else
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zaf_ctrl_get_extitem_block <$1 "$2" | zaf_block_get_moption "$3" \
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|| zaf_ctrl_get_extitem_block <$1 "$2" | zaf_block_get_option "$3"
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fi
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}
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# Check dependencies based on control file
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zaf_ctrl_check_deps() {
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local deps
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deps=$(zaf_ctrl_get_global_block <$1 | zaf_block_get_option "Depends-${ZAF_PKG}" )
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if ! zaf_os_specific zaf_check_deps $deps; then
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zaf_err "Missing one of dependend system packages: $deps"
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fi
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deps=$(zaf_ctrl_get_global_block <$1 | zaf_block_get_option "Depends-bin" )
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for cmd in $deps; do
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if ! which $cmd >/dev/null; then
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zaf_err "Missing binary dependency $cmd. Please install it first."
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fi
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done
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}
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# Install sudo config from control
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# $1 plugin
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# $2 control
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# $3 plugindir
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zaf_ctrl_sudo() {
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local pdir
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local plugin
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local sudo
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local cmd
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local parms
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pdir="$3"
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plugin=$1
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zaf_dbg "Installing sudoers entry $ZAF_SUDOERSD/zaf_$plugin"
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sudo=$(zaf_ctrl_get_global_option $2 "Sudo" | zaf_far '{PLUGINDIR}' "${plugindir}")
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[ -z "$sudo" ] && return # Nothing to install
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if ! which sudo >/dev/null; then
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zaf_wrn "Sudo needed bud not installed?"
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fi
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cmd=$(echo $sudo | cut -d ' ' -f 1)
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parms=$(echo $sudo | cut -d ' ' -f 2-)
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if which $cmd >/dev/null ; then
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(echo "zabbix ALL=NOPASSWD:SETENV: $(which $cmd) $(echo $parms | tr '%' '*')";echo) >$ZAF_SUDOERSD/zaf_$plugin || zaf_err "Error during zaf_ctrl_sudo"
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chmod 0440 $ZAF_SUDOERSD/zaf_$plugin
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else
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zaf_err "Cannot find binary '$cmd' to put into sudoers."
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fi
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}
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# Install crontab config from control
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# $1 plugin
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# $2 control
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# $3 plugindir
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zaf_ctrl_cron() {
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local pdir
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local plugin
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local cron
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pdir="$3"
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plugin=$1
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zaf_dbg "Installing cron entry $ZAF_CROND/zaf_$plugin"
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cron=$(zaf_ctrl_get_global_option $2 "Cron")
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[ -z "$cron" ] && return # Nothing to install
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zaf_ctrl_get_global_option $2 "Cron" | zaf_far '{PLUGINDIR}' "${plugindir}" >$ZAF_CROND/zaf_$plugin || zaf_err "Error during zaf_ctrl_cron"
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}
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# Install files defined to be installed in control to plugun directory
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# $1 pluginurl
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# $2 control
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# $3 plugindir
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zaf_ctrl_install() {
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local binaries
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local pdir
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local script
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local files
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local f
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local b
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pdir="$3"
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(set -e
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binaries=$(zaf_ctrl_get_global_option $2 "Install-bin")
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for b in $binaries; do
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zaf_fetch_url "$1/$b" >"${ZAF_TMP_DIR}/$b"
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zaf_install_bin "${ZAF_TMP_DIR}/$b" "$pdir"
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done
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files=$(zaf_ctrl_get_global_option $2 "Install-files")
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for f in $files; do
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zaf_fetch_url "$1/$b" >"${ZAF_TMP_DIR}/$b"
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zaf_install "${ZAF_TMP_DIR}/$b" "$pdir"
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done
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script=$(zaf_ctrl_get_global_option $2 "Install-script")
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[ -n "$script" ] && eval "$script"
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true
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) || zaf_err "Error during zaf_ctrl_install"
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}
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# Generates zabbix items cfg from control file
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# $1 control
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# $2 pluginname
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zaf_ctrl_generate_items_cfg() {
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local items
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local cmd
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local iscript
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local ikey
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local lock
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local cache
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items=$(zaf_ctrl_get_items <"$1")
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(set -e
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for i in $items; do
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iscript=$(zaf_stripctrl $i)
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params=$(zaf_ctrl_get_item_option $1 $i "Parameters")
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if [ -n "$params" ]; then
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ikey="$2.$i[*]"
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args=""
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apos=1;
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for p in $params; do
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args="$args \$$apos"
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apos=$(expr $apos + 1)
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done
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else
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ikey="$2.$i"
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fi
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lock=$(zaf_ctrl_get_item_option $1 $i "Lock")
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if [ -n "$lock" ]; then
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lock="${ZAF_LIB_DIR}/zaflock $lock "
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fi
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cache=$(zaf_ctrl_get_item_option $1 $i "Cache")
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if [ -n "$cache" ]; then
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cache="_cache '$cache' "
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fi
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cmd=$(zaf_ctrl_get_item_option $1 $i "Cmd")
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if [ -n "$cmd" ]; then
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$(which echo) "UserParameter=$ikey,${ZAF_LIB_DIR}/preload.sh $cache $lock$cmd";
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continue
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fi
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cmd=$(zaf_ctrl_get_item_option $1 $i "Script")
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if [ -n "$cmd" ]; then
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zaf_ctrl_get_item_option $1 $i "Script" | \
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zaf_far '{INCLUDES}' '. /etc/zaf.conf; . ${ZAF_LIB_DIR}/zaf.lib.sh; . ${ZAF_LIB_DIR}/ctrl.lib.sh; . ${ZAF_LIB_DIR}/zbxapi.lib.sh; . ${ZAF_LIB_DIR}/cache.lib.sh; ' \
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>${ZAF_TMP_DIR}/${iscript}.sh;
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zaf_install_bin ${ZAF_TMP_DIR}/${iscript}.sh ${ZAF_PLUGINS_DIR}/$2/
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$(which echo) "UserParameter=$ikey,$cache $lock${ZAF_PLUGINS_DIR}/$2/${iscript}.sh $args";
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continue;
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fi
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zaf_err "Item $i declared in control file but has no Cmd, Function or Script!"
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done
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) || zaf_err "Error during zaf_ctrl_generate_items_cfg"
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}
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# Generates zabbix cfg for external items from control file
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# $1 control
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# $2 pluginname
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zaf_ctrl_generate_extitems_cfg() {
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local items
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local cmd
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local iscript
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local ikey
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local lock
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local cache
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items=$(zaf_ctrl_get_extitems <"$1")
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if [ -n "$items" ] && [ -z "${ZAF_SERVER_EXTSCRIPTS}" ] || ! [ -d "${ZAF_SERVER_EXTSCRIPTS}" ]; then
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zaf_err "Zabbix server external scripts directory '${ZAF_SERVER_EXTSCRIPTS}' unknown. Cannot add external item."
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fi
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(set -e
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for i in $items; do
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iscript=$(zaf_stripctrl $i)
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params=$(zaf_ctrl_get_extitem_option $1 $i "Parameters")
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ikey="$2.$i"
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if [ -n "$params" ]; then
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args=""
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apos=1;
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for p in $params; do
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args="$args \$$apos"
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apos=$(expr $apos + 1)
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done
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fi
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lock=$(zaf_ctrl_get_extitem_option $1 $i "Lock")
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if [ -n "$lock" ]; then
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lock="${ZAF_LIB_DIR}/zaflock $lock "
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fi
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cache=$(zaf_ctrl_get_extitem_option $1 $i "Cache")
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if [ -n "$cache" ]; then
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cache="_cache '$cache' "
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fi
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cmd=$(zaf_ctrl_get_extitem_option $1 $i "Cmd")
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if [ -n "$cmd" ]; then
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$(which echo) "UserParameter=$ikey,${ZAF_LIB_DIR}/preload.sh $cache $lock$cmd";
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continue
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fi
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cmd=$(zaf_ctrl_get_extitem_option $1 $i "Script")
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if [ -n "$cmd" ]; then
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zaf_ctrl_get_extitem_option $1 $i "Script" >${ZAF_TMP_DIR}/${iscript}.sh;
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zaf_install_bin ${ZAF_TMP_DIR}/${iscript}.sh ${ZAF_PLUGINS_DIR}/$2/
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$(which echo) -e "#!/bin/sh\n${ZAF_LIB_DIR}/preload.sh $cache $lock${ZAF_PLUGINS_DIR}/$2/${iscript}.sh $args" >${ZAF_SERVER_EXTSCRIPTS}/$ikey;
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chmod +x ${ZAF_SERVER_EXTSCRIPTS}/$ikey
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continue;
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fi
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zaf_err "External item $i declared in control file but has no Cmd, Function or Script!"
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done
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) || zaf_err "Error during zaf_ctrl_generate_items_cfg"
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}
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