From e1908ae95dd4c9d19ee4dfabfc8bf8a7f85943fe Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 18:58:41 +0200 Subject: Adding upstream version 9.4. Signed-off-by: Daniel Baumann --- tests/head/head-pos.sh | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100755 tests/head/head-pos.sh (limited to 'tests/head/head-pos.sh') diff --git a/tests/head/head-pos.sh b/tests/head/head-pos.sh new file mode 100755 index 0000000..c24edd1 --- /dev/null +++ b/tests/head/head-pos.sh @@ -0,0 +1,44 @@ +#!/bin/sh +# When reading a specified number of lines, ensure that the output +# file pointer is positioned just after those lines. + +# Copyright (C) 2002-2023 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 . + +. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src +print_ver_ head + +(echo a; echo b) > in || framework_failure_ +echo b > exp || framework_failure_ + +for i in -1 1; do + (head -n $i >/dev/null; cat) < in > out || fail=1 + compare exp out || fail=1 +done + +# Exercise the (start_pos < pos) block in elide_tail_lines_seekable. +# So far, this is the only test to do that. +# Do that by creating a file larger than BUFSIZ (I've seen 128K) and +# elide a suffix of it (by line count) that is also larger than BUFSIZ. +# 50000 lines times 6 bytes per line gives us enough leeway even on a +# system with a BUFSIZ of 256K. +n_lines=50000 +seq 70000 > in2 || framework_failure_ +echo $n_lines > exp-n || framework_failure_ + +(head -n-$n_lines>/dev/null; wc -l) < in2 > n +compare exp-n n || fail=1 + +Exit $fail -- cgit v1.2.3