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a863644397
* tests/misc/cat-buf: Increase the delay between writes to decrease the chance that dd will read both at once. Since the test is inherently racy, print a warning via skip_test_ rather than failing outright. Reported by Jim Meyering.
47 lines
1.4 KiB
Bash
Executable File
47 lines
1.4 KiB
Bash
Executable File
#!/bin/sh
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# Ensure that cat outputs processed data immediately.
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# Copyright (C) 2009 Free Software Foundation, Inc.
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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if test "$VERBOSE" = yes; then
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set -x
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cat --version
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fi
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. $srcdir/test-lib.sh
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# Use a fifo rather than a pipe in the tests below
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# so that the producer (cat) will wait until the
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# consumer (dd) opens the fifo therefore increasing
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# the chance that dd will read the data from each
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# write separately.
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mkfifo fifo || framework_failure
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fail=0
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echo 1 > exp
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dd count=1 if=fifo > out &
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(echo 1; sleep .5; echo 2) | cat -v > fifo
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wait # for dd to complete
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# Though unlikely, this test may fail because dd was starved
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# between opening the fifo and reading from it until after the
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# second echo. So ask to double check rather than failing.
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compare out exp || skip_test_ "possible test failure. Please verify."
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Exit $fail
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