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Diffstat (limited to 'tests/tail-2/retry.sh')
| -rw-r--r-- | tests/tail-2/retry.sh | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/tests/tail-2/retry.sh b/tests/tail-2/retry.sh new file mode 100644 index 000000000..71d101556 --- /dev/null +++ b/tests/tail-2/retry.sh @@ -0,0 +1,94 @@ +#!/bin/sh +# Exercise tail's behavior regarding missing files with/without --retry. + +# Copyright (C) 2013 Free Software Foundation, Inc. + +# 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/>. + +. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src +print_ver_ tail + +# Function to check the expected line count in 'out'. +# Called via retry_delay_(). Sleep some time - see retry_delay_() - if the +# line count is still smaller than expected. +wait4lines_ () +{ + local delay=$1 + local elc=$2 # Expected line count. + [ $( wc -l < out ) -ge $elc ] || { sleep $delay; return 1; } +} + +# === Test: +# Retry without --follow results in a warning. +touch file +tail --retry file > out 2>&1 || fail=1 +[ $( wc -l < out ) = 1 ] || fail=1 +grep -F 'tail: warning: --retry ignored' out || fail=1 + +# === Test: +# The same with a missing file: expect error message and exit 1. +tail --retry missing > out 2>&1 && fail=1 +[ $( wc -l < out ) = 2 ] || fail=1 +grep -F 'tail: warning: --retry ignored' out || fail=1 + +# === Test: +# Ensure that "tail --retry --follow=name" waits for the file to appear. +timeout 10 tail -s.1 --follow=name --retry missing >out 2>&1 & pid=$! +retry_delay_ wait4lines_ .1 6 1 || fail=1 # Wait for "cannot open" error. +echo "X" > missing || fail=1 # Write "X" into 'missing'. +retry_delay_ wait4lines_ .1 6 3 || fail=1 # Wait for the expected output. +kill $pid +wait $pid +# Expect 3 lines in the output file. +[ $( wc -l < out ) = 3 ] || { fail=1; cat out; } +grep -F 'cannot open' out || { fail=1; cat out; } +grep -F 'has become accessible' out || { fail=1; cat out; } +grep '^X$' out || { fail=1; cat out; } +rm -f missing out || fail=1 + +# === Test: +# Ensure that "tail --retry --follow=descriptor" waits for the file to appear. +# tail-8.21 failed at this (since the implementation of the inotify support). +timeout 10 tail -s.1 --follow=descriptor --retry missing >out 2>&1 & pid=$! +retry_delay_ wait4lines_ .1 6 2 || fail=1 # Wait for "cannot open" error. +echo "X" > missing || fail=1 # Write "X" into 'missing'. +retry_delay_ wait4lines_ .1 6 4 || fail=1 # Wait for the expected output. +kill $pid +wait $pid +# Expect 4 lines in the output file. +[ $( wc -l < out ) = 4 ] || { fail=1; cat out; } +grep -F 'retry only effective for the initial open' out \ + || { fail=1; cat out; } +grep -F 'cannot open' out || { fail=1; cat out; } +grep -F 'has appeared' out || { fail=1; cat out; } +grep '^X$' out || { fail=1; cat out; } +rm -f missing out || fail=1 + +# === Test: +# Ensure that --follow=descriptor (without --retry) does *not wait* for the +# file to appear. Expect 2 lines in the output file ("cannot open" + +# "no files remaining") and exit status 1. +tail --follow=descriptor missing >out 2>&1 && fail=1 +[ $( wc -l < out ) = 2 ] || { fail=1; cat out; } +grep -F 'cannot open' out || { fail=1; cat out; } +grep -F 'no files remaining' out || { fail=1; cat out; } + +# === Test: +# Likewise for --follow=name (without --retry). +tail --follow=name missing >out 2>&1 && fail=1 +[ $( wc -l < out ) = 2 ] || { fail=1; cat out; } +grep -F 'cannot open' out || { fail=1; cat out; } +grep -F 'no files remaining' out || { fail=1; cat out; } + +Exit $fail |