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passt/test/lib/util
Stefano Brivio ca2749e1bd passt: Relicense to GPL 2.0, or any later version
In practical terms, passt doesn't benefit from the additional
protection offered by the AGPL over the GPL, because it's not
suitable to be executed over a computer network.

Further, restricting the distribution under the version 3 of the GPL
wouldn't provide any practical advantage either, as long as the passt
codebase is concerned, and might cause unnecessary compatibility
dilemmas.

Change licensing terms to the GNU General Public License Version 2,
or any later version, with written permission from all current and
past contributors, namely: myself, David Gibson, Laine Stump, Andrea
Bolognani, Paul Holzinger, Richard W.M. Jones, Chris Kuhn, Florian
Weimer, Giuseppe Scrivano, Stefan Hajnoczi, and Vasiliy Ulyanov.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
2023-04-06 18:00:33 +02:00

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#!/bin/sh
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# PASST - Plug A Simple Socket Transport
# for qemu/UNIX domain socket mode
#
# PASTA - Pack A Subtle Tap Abstraction
# for network namespace/tap device mode
#
# test/lib/util - Convenience functions
#
# Copyright (c) 2021 Red Hat GmbH
# Author: Stefano Brivio <sbrivio@redhat.com>
# list_has() - Check whether a tab-separated list contains a given token
# $1: List
# $2: Token
# Return: 0 if token was found or is empty, 1 otherwise
list_has() {
[ -z "${2}" ] && return 0
__ifs="${IFS}"
IFS=' '
for __t in ${1}; do
[ "${__t}" = "${2}" ] && IFS="${__ifs}" && return 0
done
IFS="${__ifs}"
return 1
}
# list_add() - Add token to tab-separated list, unless it's already present
# $1: List
# $2: Token
list_add() {
list_has "${1}" "${2}" && return
[ -n "${1}" ] && printf '%s\t%s\n' "${1}" "${2}" || printf '%s\n' "${2}"
}
# list_remove_pair() - Drop pair with given key if present
# $1: List
# $2: Key
list_remove_pair()
{
__ifs="${IFS}"
IFS=' '
__skip_next=0
for __t in ${1}; do
[ ${__skip_next} -eq 1 ] && __skip_next=0 && continue
[ "${__t}" = "${2}" ] && __skip_next=1 && continue
printf '%s\t' "${__t}"
done
printf "\n"
IFS="${__ifs}"
}
# list_add_pair() - Add token pair to list, replace if the first one is present
# $1: List
# $2: First token
# $3: Second token
list_add_pair() {
[ -z "${3}" ] && return
if [ -n "${1}" ]; then
__new_list="$(list_remove_pair "${1}" "${2}")"
printf '%s\t%s\t%s' "${__new_list}" "${2}" "${3}"
else
printf '%s\t%s' "${2}" "${3}"
fi
printf "\n"
}
# list_has_all() - Check whether a list contains all given IFS-separated tokens
# $1: List
# $2: List of tokens
# Return: 0 if list of tokens was found or is empty, 1 otherwise
list_has_all() {
[ -z "${2}" ] && return 0
for __i in ${2}; do
list_has "${1}" "${__i}" || return 1
done
return 0
}
# file_def() - List of tokens tab-separated line from file, starting with key
# $1: Filename
# $2: Token
file_def() {
sed -n 's/^'"${2}"'\t\(.*\)/\1/p' "${1}" | tr ' ' '\t'
}
# subs_apply() - Apply substitutions using a list of token pairs
# $1: List of substitutions
# $2: String where substitutions have to be applied
subs_apply() {
__ifs="${IFS}"
IFS=' '
__newarg="${2}"
__s=
for __t in ${1}; do
[ -z "${__s}" ] && __s="${__t}" && continue
__et="$(printf '%s\n' "$__t" | sed -e 's/[\/&]/\\&/g')"
__es="$(printf '%s\n' "$__s" | sed -e 's/[]\/$*.^[]/\\&/g')"
__newarg="$(printf '%s' "${__newarg}" | sed "s/${__es}/${__et}/g")"
__s=
done
printf '%s' "${__newarg}"
IFS="${__ifs}"
}
# get_info_cols() - Get number of columns for info pane
get_info_cols() {
__log_pane_cols=
__j=0
for __i in $(tmux list-panes -t passt_test:1.0 -F "#{pane_width}"); do
[ ${__j} -eq ${PANE_INFO} ] && STATUS_COLS=${__i} && break
__j=$((__j + 1))
done
}
# wait_for() - Retry a command until it succeeds
# $@: Command to run
wait_for() {
while ! "$@"; do
sleep 0.1 || sleep 1
done
}