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b16e999f55
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.
84 lines
2.5 KiB
Bash
Executable File
84 lines
2.5 KiB
Bash
Executable File
#!/bin/sh
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# Demonstrate that tail -F works when renaming the tailed files.
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# Between coreutils 7.5 and 8.2 inclusive, 'tail -F a b' would
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# stop tracking additions to b after 'mv a b'.
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# Copyright (C) 2009-2016 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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. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
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print_ver_ tail
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check_tail_output()
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{
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local delay="$1"
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grep "$tail_re" out ||
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{ sleep $delay; return 1; }
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}
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# Terminate any background tail process
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cleanup_() { kill $pid 2>/dev/null && wait $pid; }
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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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rm -f a b out
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touch a b || framework_failure_
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tail $mode -F $fastpoll a b > out 2>&1 & pid=$!
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# Wait up to 12.7s for tail to start.
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echo x > a
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tail_re='^x$' retry_delay_ check_tail_output .1 7 || { cat out; fail=1; }
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mv a b || framework_failure_
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# Wait 12.7s for this diagnostic:
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# tail: 'a' has become inaccessible: No such file or directory
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tail_re='inaccessible' retry_delay_ check_tail_output .1 7 ||
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{ cat out; fail=1; }
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echo x > a
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# Wait up to 12.7s for this to appear in the output:
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# "tail: '...' has appeared; following new file"
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tail_re='has appeared' retry_delay_ check_tail_output .1 7 ||
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{ echo "$0: a: unexpected delay?"; cat out; fail=1; }
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echo y >> b
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# Wait up to 12.7s for "y" to appear in the output:
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tail_f_vs_rename_2() {
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local delay="$1"
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tr '\n' @ < out | grep '@@==> b <==@y@$' > /dev/null ||
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{ sleep $delay; return 1; }
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}
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retry_delay_ tail_f_vs_rename_2 .1 7 ||
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{ echo "$0: b: unexpected delay?"; cat out; fail=1; }
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echo z >> a
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# Wait up to 12.7s for "z" to appear in the output:
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tail_f_vs_rename_3() {
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local delay="$1"
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tr '\n' @ < out | grep '@@==> a <==@z@$' > /dev/null ||
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{ sleep $delay; return 1; }
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}
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retry_delay_ tail_f_vs_rename_3 .1 7 ||
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{ echo "$0: a: unexpected delay?"; cat out; fail=1; }
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cleanup_
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done
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Exit $fail
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