68 lines
2.1 KiB
Plaintext
68 lines
2.1 KiB
Plaintext
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#!/bin/sh
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#
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# Ensure that strace does not retain stdin and stdout descriptors.
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#
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# Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# 3. The name of the author may not be used to endorse or promote products
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# derived from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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. "${srcdir=.}/init.sh"
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run_prog_skip_if_failed \
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kill -0 $$
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check_prog sleep
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check_prog yes
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> "$LOG"
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(
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$SLEEP_A_BIT &
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yes
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if kill -0 $! 2> /dev/null; then
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wait
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else
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echo TIMEOUT >> $LOG
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fi
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) | $STRACE -o/dev/null sh -c "exec <&- >&-; $SLEEP_A_BIT; $SLEEP_A_BIT"
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if [ -s "$LOG" ]; then
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fail_ "$STRACE failed to redirect standard input"
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fi
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$STRACE -o/dev/null sh -c "exec <&- >&-; $SLEEP_A_BIT; $SLEEP_A_BIT" |
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(
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$SLEEP_A_BIT &
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cat > /dev/null
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if kill -0 $! 2> /dev/null; then
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wait
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else
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echo TIMEOUT >> $LOG
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fi
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)
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if [ -s "$LOG" ]; then
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fail_ "$STRACE failed to redirect standard output"
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fi
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