127 lines
3.0 KiB
Bash
127 lines
3.0 KiB
Bash
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#
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# Common functions used by pktgen scripts
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# - Depending on bash 3 (or higher) syntax
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#
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# Author: Jesper Dangaaard Brouer
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# License: GPL
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set -o errexit
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## -- General shell logging cmds --
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function err() {
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local exitcode=$1
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shift
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echo "ERROR: $@" >&2
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exit $exitcode
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}
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function warn() {
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echo "WARN : $@" >&2
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}
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function info() {
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if [[ -n "$VERBOSE" ]]; then
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echo "INFO : $@" >&2
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fi
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}
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## -- Pktgen proc config commands -- ##
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export PROC_DIR=/proc/net/pktgen
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#
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# Three different shell functions for configuring the different
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# components of pktgen:
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# pg_ctrl(), pg_thread() and pg_set().
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#
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# These functions correspond to pktgens different components.
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# * pg_ctrl() control "pgctrl" (/proc/net/pktgen/pgctrl)
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# * pg_thread() control the kernel threads and binding to devices
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# * pg_set() control setup of individual devices
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function pg_ctrl() {
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local proc_file="pgctrl"
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proc_cmd ${proc_file} "$@"
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}
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function pg_thread() {
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local thread=$1
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local proc_file="kpktgend_${thread}"
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shift
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proc_cmd ${proc_file} "$@"
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}
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function pg_set() {
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local dev=$1
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local proc_file="$dev"
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shift
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proc_cmd ${proc_file} "$@"
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}
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# More generic replacement for pgset(), that does not depend on global
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# variable for proc file.
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function proc_cmd() {
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local result
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local proc_file=$1
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local status=0
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# after shift, the remaining args are contained in $@
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shift
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local proc_ctrl=${PROC_DIR}/$proc_file
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if [[ ! -e "$proc_ctrl" ]]; then
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err 3 "proc file:$proc_ctrl does not exists (dev added to thread?)"
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else
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if [[ ! -w "$proc_ctrl" ]]; then
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err 4 "proc file:$proc_ctrl not writable, not root?!"
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fi
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fi
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if [[ "$DEBUG" == "yes" ]]; then
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echo "cmd: $@ > $proc_ctrl"
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fi
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# Quoting of "$@" is important for space expansion
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echo "$@" > "$proc_ctrl" || status=$?
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if [[ "$proc_file" != "pgctrl" ]]; then
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result=$(grep "Result: OK:" $proc_ctrl) || true
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if [[ "$result" == "" ]]; then
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grep "Result:" $proc_ctrl >&2
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fi
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fi
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if (( $status != 0 )); then
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err 5 "Write error($status) occurred cmd: \"$@ > $proc_ctrl\""
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fi
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}
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# Old obsolete "pgset" function, with slightly improved err handling
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function pgset() {
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local result
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if [[ "$DEBUG" == "yes" ]]; then
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echo "cmd: $1 > $PGDEV"
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fi
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echo $1 > $PGDEV
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local status=$?
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result=`cat $PGDEV | fgrep "Result: OK:"`
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if [[ "$result" == "" ]]; then
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cat $PGDEV | fgrep Result:
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fi
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if (( $status != 0 )); then
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err 5 "Write error($status) occurred cmd: \"$1 > $PGDEV\""
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fi
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}
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[[ $EUID -eq 0 ]] && trap 'pg_ctrl "reset"' EXIT
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## -- General shell tricks --
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function root_check_run_with_sudo() {
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# Trick so, program can be run as normal user, will just use "sudo"
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# call as root_check_run_as_sudo "$@"
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if [ "$EUID" -ne 0 ]; then
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if [ -x $0 ]; then # Directly executable use sudo
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info "Not root, running with sudo"
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sudo "$0" "$@"
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exit $?
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fi
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err 4 "cannot perform sudo run of $0"
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fi
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}
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