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git://git.sv.gnu.org/coreutils.git
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3067a9293a
Run "make update-copyright" and then... * gnulib: Update to latest with copyright year adjusted. * tests/init.sh: Sync with gnulib to pick up copyright year. * bootstrap: Likewise. * tests/sample-test: Adjust to use the single most recent year.
64 lines
2.2 KiB
Bash
Executable File
64 lines
2.2 KiB
Bash
Executable File
#!/bin/sh
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# ensure that tail -f doesn't hang in various cases
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# Copyright (C) 2009-2022 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 <https://www.gnu.org/licenses/>.
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. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
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print_ver_ tail test
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trap_sigpipe_or_skip_
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# Speedup the non inotify case
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fastpoll='-s.1 --max-unchanged-stats=1'
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for mode in '' '---disable-inotify'; do
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# Ensure :|tail -f doesn't hang, per POSIX
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echo oo > exp || framework_failure_
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echo foo | timeout 10 tail -f $mode $fastpoll -c3 > out || fail=1
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compare exp out || fail=1
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cat <<\EOF > exp || framework_failure_
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==> standard input <==
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ar
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EOF
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echo bar | returns_ 1 \
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timeout 10 tail -f $mode $fastpoll -c3 - missing > out || fail=1
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compare exp out || fail=1
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# This would wait indefinitely before v8.28 due to no EPIPE being
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# generated due to no data written after the first small amount.
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# Also check tail exits if SIGPIPE is being ignored.
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# Note 'trap - SIGPIPE' is ineffective if the initiating shell
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# has ignored SIGPIPE, but that's not the normal case.
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for disposition in '' '-'; do
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(trap "$disposition" PIPE;
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returns_ 124 timeout 10 \
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tail -n2 -f $mode $fastpoll out && touch timed_out) |
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sed 2q > out2
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test -e timed_out && fail=1
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compare exp out2 || fail=1
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rm -f timed_out
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done
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# This would wait indefinitely before v8.28 (until first write)
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# test -w /dev/stdout is used to check that >&- is effective
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# which was seen not to be the case on NetBSD 7.1 / x86_64:
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if env test -w /dev/stdout >/dev/null &&
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env test ! -w /dev/stdout >&-; then
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(returns_ 1 timeout 10 tail -f $mode $fastpoll /dev/null >&-) || fail=1
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fi
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done
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Exit $fail
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