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#!/bin/bash
### emacs-shell-lib - shared code for Emacs shell scripts
## Copyright (C) 2022-2024 Free Software Foundation, Inc.
## Author: Stefan Kangas <stefankangas@gmail.com>
## This file is part of GNU Emacs.
## GNU Emacs is free software: you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
## GNU Emacs is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
## You should have received a copy of the GNU General Public License
## along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
### Code:
# Set an explicit umask.
umask 077
# Treat unset variables as an error.
set -o nounset
# Exit immediately on error.
set -o errexit
# Avoid non-standard command output from non-C locales.
unset LANG LC_ALL LC_MESSAGES
PN=${0##*/} # basename of script
PD=${0%/*} # script directory
[ "$PD" = "$0" ] && PD=. # if PATH includes PWD
die () # write error to stderr and exit
{
[ $# -gt 0 ] && echo "$PN: $@" >&2
exit 1
}
emacs_tempfiles=()
emacs_tempfiles_cleanup ()
{
# This is needed on Bash 4.4 or older.
[ ${#emacs_tempfiles[@]} -eq 0 ] && return
for file in ${emacs_tempfiles[@]}; do
rm -f "${file}" 2> /dev/null
done
}
trap '
ret=$?
emacs_tempfiles_cleanup
exit $ret
' EXIT
emacs_mktemp ()
{
local readonly file="${1-}"
local tempfile
local prefix
if [ -z "$file" ]; then
prefix="$PN"
else
prefix="$1"
fi
if [ -x "$(command -v mktemp)" ]; then
tempfile=$(mktemp "${TMPDIR-/tmp}/${prefix}.XXXXXXXXXX")
else
tempfile="${TMPDIR-/tmp}/${prefix}.$RANDOM$$"
(umask 077 && touch "$tempfile")
fi
[ -z "${tempfile}" ] && die "Creating temporary file failed"
emacs_tempfiles+=("${tempfile}")
echo "$tempfile"
}
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