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#!/bin/sh
# Copyright 2019-2023 Johannes Schauer Marin Rodrigues <josch@debian.org>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
set -eu
PROGNAME=${0##*/}
handler() {
while IFS= read -r line; do
printf "%s %s: %s\n" "$($1)" "$2" "$line"
done
if [ -n "$line" ]; then
printf "%s %s: %s" "$($1)" "$2" "$line"
fi
}
usage() {
echo \
"Usage: $PROGNAME [options] program [args ...]
Run program and annotate STDOUT/STDERR with a timestamp.
Options:
+FORMAT - Controls the timestamp format as per date(1)
-h, --help - Show this message"
}
FMT="+%H:%M:%S"
while [ -n "${1-}" ]; do
case "$1" in
+*)
FMT="$1"
shift
;;
-h|-help|--help)
usage
exit 0
;;
*)
break
;;
esac
done
if [ $# -lt 1 ]; then
usage
exit 1
fi
# shellcheck disable=SC2317
plainfmt() { printf "%s" "$FMT"; }
# shellcheck disable=SC2317
datefmt() { date "$FMT"; }
case "$FMT" in
*%*) formatter=datefmt;;
*) formatter=plainfmt; FMT="${FMT#+}";;
esac
echo Started "$@" | handler $formatter I
# The following block redirects FD 2 (stderr) to FD 1 (stdout) which is then
# processed by the stderr handler. It redirects FD 1 (stdout) to FD 4 such
# that it can later be move to FD 1 (stdout) and handled by the stdout handler.
# The exit status of the program gets written to FD 2 (stderr) which is then
# captured to produce the correct exit status as the last step of the pipe.
# Both the stdout and stderr handler output to FD 3 such that after exiting
# with the correct exit code, FD 3 can be redirected to FD 1 (stdout).
err=0
{
{
{
{
{
"$@" 2>&1 1>&4 3>&- 4>&-; echo $? >&2;
} | handler $formatter E >&3;
} 4>&1 | handler $formatter O >&3;
} 2>&1;
} | { read -r xs; exit "$xs"; };
} 3>&1 || err=$?
echo "Finished with exitcode $err" | handler $formatter I
exit $err
|
