1#!/bin/sh
2# Ensure dd treats '--' properly.
3# Also test some flag values.
4
5# Copyright (C) 1999-2023 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_ dd
22export LC_ALL=C
23
24tmp_in=dd-in
25tmp_in2=dd-in2
26tmp_sym=dd-sym
27tmp_out=dd-out
28
29warn=0
30echo data > $tmp_in || framework_failure_
31ln $tmp_in $tmp_in2 || framework_failure_
32ln -s $tmp_in $tmp_sym || framework_failure_
33
34# check status=none suppresses all output to stderr
35dd status=none if=$tmp_in of=/dev/null 2> err || fail=1
36compare /dev/null err || fail=1
37dd status=none if=$tmp_in skip=2 of=/dev/null 2> err || fail=1
38compare /dev/null err || fail=1
39# check later status=none overrides earlier status=noxfer
40dd status=noxfer status=none if=$tmp_in of=/dev/null 2> err || fail=1
41compare /dev/null err || fail=1
42# check later status=noxfer overrides earlier status=none
43dd status=none status=noxfer if=$tmp_in of=/dev/null 2> err || fail=1
44compare /dev/null err && fail=1
45
46dd if=$tmp_in of=$tmp_out 2> /dev/null || fail=1
47compare $tmp_in $tmp_out || fail=1
48
49rm $tmp_out
50dd -- if=$tmp_in of=$tmp_out 2> /dev/null || fail=1
51compare $tmp_in $tmp_out || fail=1
52
53if dd oflag=append if=$tmp_in of=$tmp_out 2> /dev/null; then
54  compare $tmp_in $tmp_out || fail=1
55fi
56
57case $(cat /dev/stdin <$tmp_in 2>/dev/null) in
58(data)
59  rm -f $tmp_out
60  dd if=/dev/stdin of=$tmp_out <$tmp_in || fail=1
61  compare $tmp_in $tmp_out || fail=1
62esac
63
64if dd iflag=nofollow if=$tmp_in count=0 2> /dev/null; then
65  returns_ 1 dd iflag=nofollow if=$tmp_sym count=0 2> /dev/null || fail=1
66fi
67
68if dd iflag=directory if=. count=0 2> /dev/null; then
69  dd iflag=directory count=0 <. 2> /dev/null || fail=1
70  returns_ 1 dd iflag=directory count=0 <$tmp_in 2> /dev/null || fail=1
71fi
72
73old_ls=$(ls -u --full-time $tmp_in)
74sleep 1
75if dd iflag=noatime if=$tmp_in of=$tmp_out 2> /dev/null; then
76  new_ls=$(ls -u --full-time $tmp_in)
77  if test "x$old_ls" != "x$new_ls"; then
78    cat >&2 <<EOF
79=================================================================
80$0: WARNING!!!
81This operating system has the O_NOATIME file status flag,
82but it is silently ignored in some cases.
83Therefore, dd options like iflag=noatime may be silently ignored.
84=================================================================
85EOF
86    warn=77
87  fi
88fi
89
90if dd oflag=nolinks if=$tmp_in of=$tmp_out 2> /dev/null; then
91  returns_ 1 dd iflag=nolinks if=$tmp_in > /dev/null 2>&1 || fail=1
92  returns_ 1 dd iflag=nolinks < $tmp_in > /dev/null 2>&1 || fail=1
93  dd oflag=nolinks < $tmp_in > $tmp_out 2>&1 || fail=1
94fi
95
96outbytes=$(echo x | dd bs=3 ibs=10 obs=10 conv=sync 2>/dev/null | wc -c)
97test "$outbytes" -eq 3 || fail=1
98
99# A delay is required to trigger a failure.
100# There might be some missed failures but it's unlikely.
101(echo a; sleep .1; echo b) \
102  | dd bs=4 status=noxfer iflag=fullblock >out 2>err || fail=1
103printf 'a\nb\n' > out_ok || framework_failure_
104echo "1+0 records in
1051+0 records out" > err_ok || framework_failure_
106compare out_ok out || fail=1
107compare err_ok err || fail=1
108
109test $fail -eq 0 && fail=$warn
110
111# Check a warning is issued for ambiguous 0x... numbers
112dd if=/dev/null count=0x1 seek=0x1 skip=0x1 status=none 2>err || fail=1
113cat <<\EOF >exp
114dd: warning: '0x' is a zero multiplier; use '00x' if that is intended
115dd: warning: '0x' is a zero multiplier; use '00x' if that is intended
116dd: warning: '0x' is a zero multiplier; use '00x' if that is intended
117EOF
118compare exp err || fail=1
119
120echo "0+0 records in
1210+0 records out" >err_ok || framework_failure_
122big=9999999999999999999999999999999999999999999999999999999999999
123dd if=$tmp_in of=$tmp_out count=00x$big status=noxfer 2>err || fail=1
124compare /dev/null $tmp_out || fail=1
125compare err_ok err || fail=1
126
127Exit $fail
128