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| #!/bin/sh | |
| # | |
| # quietrun -- run a command and only allow output if the exit code | |
| # didn't reflect success. | |
| # Copyright (c) 1999 Adam Spiers <adam@spiers.net> | |
| # | |
| # This program 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. | |
| # | |
| # This program 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 this program. If not, see <http://www.gnu.org/licenses/>. | |
| # See also chronic from moreutils which does the same thing without | |
| # temporary files: | |
| # http://git.kitenet.net/?p=moreutils.git;a=blob;f=chronic;hb=HEAD | |
| tmpdir=/tmp/quietrun.$$ | |
| # Half-heartedly guard against symlink attacks/accidents. There's | |
| # still a race. Hmm. Does anyone actually care? | |
| [ -e $tmpdir ] && rm -rf $tmpdir | |
| if [ -e $tmpdir ]; then | |
| echo "Couldn't remove $tmpdir; aborting." | |
| exit 1 | |
| fi | |
| if ! mkdir $tmpdir; then | |
| echo "Couldn't create $tmpdir; aborting." | |
| exit 1 | |
| fi | |
| if [ "$1" = '-h' ] || [ "$1" = '--help' ]; then | |
| cat <<'EOF' | |
| Usage: quietrun [ -m | --merge ] <command> [ <args> ... ] | |
| If the merge option is specified, stdout and stderr are merged into | |
| stdout, but the output order is preserved. Otherwise they kept | |
| separate, but output from stderr only appears after output from stdout. | |
| The exit code from the command is preserved. | |
| EOF | |
| exit 0 | |
| fi | |
| if [ "$1" = '-m' ] || [ "$1" = '--merge' ]; then | |
| shift | |
| merge=yes | |
| fi | |
| if [ $# -eq 0 ]; then | |
| echo "quietrun: no command supplied" | |
| exit 1 | |
| fi | |
| if [ "$merge" = 'yes' ]; then | |
| "$@" 2>&1 >$tmpdir/both | |
| exit_code=$? | |
| if [ $exit_code != 0 ]; then | |
| [ -e "$tmpdir/both" ] && cat $tmpdir/both | |
| fi | |
| else | |
| "$@" >$tmpdir/stdout 2>$tmpdir/stderr | |
| exit_code=$? | |
| if [ $exit_code != 0 ]; then | |
| [ -e "$tmpdir/stdout" ] && cat $tmpdir/stdout | |
| [ -e "$tmpdir/stderr" ] && cat $tmpdir/stderr 1>&2 2>/dev/null | |
| fi | |
| fi | |
| rm -rf $tmpdir | |
| exit $exit_code |