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#! /bin/sh
#
# SPDX-License-Identifier: AGPL-3.0-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/context - Run commands in different contexts (host, guest, namespace etc.)
#
# Copyright Red Hat
# Author: David Gibson <david@gibson.dropbear.id.au>
# context_setup_host() - Create a new context for running commands on the host
# $1: Context name
context_setup_host() {
__name="$1"
__prefix="${LOGDIR}/context_${__name}"
echo sh -c > "${__prefix}.enter"
echo -n "${__name}$ " > "${__prefix}.log"
}
# context_teardown() - Remove a context (leave log files intact)
# $1: Context name
context_teardown() {
__name="$1"
__prefix="${LOGDIR}/context_${__name}"
rm -f "${__prefix}.enter"
}
# context_exists() - Test if a context currently exists
# $1: Context name
context_exists() {
__name="$1"
__prefix="${LOGDIR}/context_${__name}"
[ -f "${__prefix}.enter" ]
}
# context_run() - Run a shell command in a context, and wait for it to finish
# $1: Context name
# $*: Command to start
context_run() {
__name="$1"
__prefix="${LOGDIR}/context_${__name}"
__enter="$(cat "${__prefix}.enter")"
shift
echo "$*" >> "${__prefix}.log"
mkfifo "${__prefix}.stdout" "${__prefix}.stderr"
tee -a "${__prefix}.log" < "${__prefix}.stdout" &
tee -a "${__prefix}.log" < "${__prefix}.stderr" >&2 &
${__enter} "$*" >> "${__prefix}.stdout" 2>> "${__prefix}.stderr"
rc=$?
rm "${__prefix}.stdout" "${__prefix}.stderr"
[ ${DEBUG} -eq 1 ] && echo "[Exit code: $rc]" >> "${__prefix}.log"
echo -n "${__name}$ " >> "${__prefix}.log"
return $rc
}
# context_run_bg() - Start a shell command in a context
# $1: Context name
# $*: Command to start
context_run_bg() {
__name="$1"
__prefix="${LOGDIR}/context_${__name}"
context_run "$@" &
echo $! > "${__prefix}.pid"
}
# context_wait() - Wait for background command in a context to complete
# $1: Context name
# Returns the status of the completed command
context_wait() {
__name="$1"
__prefix="${LOGDIR}/context_${__name}"
__pid=$(cat "${__prefix}.pid")
rm "${__prefix}.pid"
wait ${__pid}
}
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