1#!/bin/sh
2# Ensure that cat -E produces same output as cat, modulo '$'s,
3# even when applied to a file in /proc.
4
5# Copyright (C) 2006-2023 Free Software Foundation, Inc.
6
7# This program is free software: you can redistribute it and/or modify
8# it under the terms of the GNU General Public License as published by
9# the Free Software Foundation, either version 3 of the License, or
10# (at your option) any later version.
11
12# This program is distributed in the hope that it will be useful,
13# but WITHOUT ANY WARRANTY; without even the implied warranty of
14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15# GNU General Public License for more details.
16
17# You should have received a copy of the GNU General Public License
18# along with this program.  If not, see <https://www.gnu.org/licenses/>.
19
20. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
21print_ver_ cat
22
23
24f=/proc/cpuinfo
25test -f $f \
26  || skip_ "no $f"
27
28
29# Yes, parts of /proc/cpuinfo might change between cat runs.
30# If that happens, consider choosing a file that's less likely to change,
31# or just filter out the changing lines.  The sed filter should help
32# to avoid any spurious numeric differences.
33cat -E $f | sed 's/[0-9][0-9]*/D/g' | tr -d '$' > out || fail=1
34cat    $f | sed 's/[0-9][0-9]*/D/g' | tr -d '$' > exp || fail=1
35
36compare exp out || fail=1
37
38Exit $fail
39