1#!/bin/sh
2# Test wc on /proc and /sys files.
3
4# Copyright 2014-2023 Free Software Foundation, Inc.
5
6# This program is free software: you can redistribute it and/or modify
7# it under the terms of the GNU General Public License as published by
8# the Free Software Foundation, either version 3 of the License, or
9# (at your option) any later version.
10
11# This program is distributed in the hope that it will be useful,
12# but WITHOUT ANY WARRANTY; without even the implied warranty of
13# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14# GNU General Public License for more details.
15
16# You should have received a copy of the GNU General Public License
17# along with this program.  If not, see <https://www.gnu.org/licenses/>.
18
19. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
20print_ver_ wc
21
22# Ensure we read() /proc files to determine content length
23for file in /proc/version /sys/kernel/profiling; do
24  if test -r $file; then
25    cp -f $file copy &&
26    wc -c < copy > exp1 || framework_failure_
27
28    wc -c < $file > out1 || fail=1
29    compare exp1 out1 || fail=1
30  fi
31done
32
33# Ensure we handle cases where we don't read()
34truncate -s 2 no_read || framework_failure_
35# read() used when multiple of page size
36truncate -s 1048576 do_read || framework_failure_
37wc -c no_read do_read > out || fail=1
38cat <<\EOF > exp
39      2 no_read
401048576 do_read
411048578 total
42EOF
43compare exp out || fail=1
44
45# Ensure we update the offset even when not reading,
46# which wasn't the case from coreutils-8.27 to coreutils-9.2
47{ wc -c; wc -c; } < no_read >  out || fail=1
48{ wc -c; wc -c; } < do_read >> out || fail=1
49cat <<\EOF > exp
502
510
521048576
530
54EOF
55compare exp out || fail=1
56
57# Ensure we don't read too much when reading,
58# as was the case on 32 bit systems
59# from coreutils-8.24 to coreutils-9.1
60if timeout 10 truncate -s1T do_read; then
61  timeout 10 wc -c do_read || fail=1
62fi
63
64Exit $fail
65