1#!/bin/sh
2# Verify that cp -p preserves GID when it is possible.
3
4# Copyright (C) 2007-2023 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. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
20print_ver_ cp
21
22require_perl_
23require_root_
24
25# Some of the tests expect a umask that grants group and/or world read access.
26working_umask_or_skip_
27
28# Record primary group number, usually 0.
29# This is the group ID used when cp (without -p) creates a new file.
30primary_group_num=$(id -g)
31
32create() {
33  echo "$1" > "$1" || exit 1
34  chown "+$2:+$3" "$1" || exit 1
35}
36
37t0() {
38  f=$1; shift
39  u=$1; shift
40  g=$1; shift
41  rm -f b || exit 1
42  "$@" "$f" b || exit 1
43  s=$(stat -c '%u %g' b)
44  if test "x$s" != "x$u $g"; then
45    # Allow the actual group to match that of the parent directory
46    # (it was set to 0 above).
47    if test "x$s" = "x$u $primary_group_num"; then
48      :
49    else
50      echo "$0: $* $f b: $u $g != $s" 1>&2
51      Exit 1
52    fi
53  fi
54}
55
56nameless_uid=$($PERL -le '
57  foreach my $i (1000..16*1024-1)
58    {
59      getpwuid $i or (print $i), exit
60    }
61')
62nameless_gid1=$($PERL -le '
63  foreach my $i (1000..16*1024)
64    {
65      getgrgid $i or (print $i), exit
66    }
67')
68nameless_gid2=$($PERL -le '
69  foreach my $i ('"$nameless_gid1"'+1..16*1024)
70    {
71      getgrgid $i or (print $i), exit
72    }
73')
74
75if test -z "$nameless_uid" \
76    || test -z "$nameless_gid1" \
77    || test -z "$nameless_gid2"; then
78  skip_ "couldn't find a nameless UID or GID"
79fi
80
81chown "+$nameless_uid:+0" .
82
83create a0 0 0
84create b0 "$nameless_uid" "$nameless_gid1"
85create b1 "$nameless_uid" "$nameless_gid2"
86create c0 0 "$nameless_gid1"
87create c1 0 "$nameless_gid2"
88
89t0 a0 0 0 cp
90t0 b0 0 0 cp
91t0 b1 0 0 cp
92t0 c0 0 0 cp
93t0 c1 0 0 cp
94
95t0 a0 0 0 cp -p
96t0 b0 "$nameless_uid" "$nameless_gid1" cp -p
97t0 b1 "$nameless_uid" "$nameless_gid2" cp -p
98t0 c0 0 "$nameless_gid1" cp -p
99t0 c1 0 "$nameless_gid2" cp -p
100
101# For the remaining tests, we need a cp binary that is accessible to a user
102# with UID of $nameless_uid.  The build directory may not be accessible,
103# so create a temporary directory and copy cp into it, ensure that
104# $nameless_uid can access it and then make that directory the search path.
105tmp_path=
106cleanup_() { rm -rf "$tmp_path"; }
107
108# Cause mktemp to create a directory directly under /tmp.
109# Setting TMPDIR explicitly is required here, in case $TMPDIR
110# is not readable by our nameless IDs.
111test -d /tmp && TMPDIR=/tmp
112tmp_path=$(mktemp -d) || fail_ "failed to create temporary directory"
113if test -x "$abs_path_dir_/coreutils" &&
114   { test -L "$abs_path_dir_/cp" ||
115     test $(wc -l < "$abs_path_dir_/cp") = 1; } then
116  # if configured with --enable-single-binary we need to use the single binary
117  cp "$abs_path_dir_/coreutils" "$tmp_path/cp" || framework_failure_
118else
119  cp "$abs_path_dir_/cp" "$tmp_path"
120fi
121chmod -R a+rx "$tmp_path"
122
123t1() {
124  f=$1; shift
125  u=$1; shift
126  g=$1; shift
127  t0 "$f" "$u" "$g" \
128      chroot --skip-chdir \
129             --user=+$nameless_uid:+$nameless_gid1 \
130             --groups="+$nameless_gid1,+$nameless_gid2" \
131        / env PATH="$tmp_path" "$@"
132}
133
134t1 a0 "$nameless_uid" "$nameless_gid1" cp
135t1 b0 "$nameless_uid" "$nameless_gid1" cp
136t1 b1 "$nameless_uid" "$nameless_gid1" cp
137t1 c0 "$nameless_uid" "$nameless_gid1" cp
138t1 c1 "$nameless_uid" "$nameless_gid1" cp
139
140t1 a0 "$nameless_uid" "$nameless_gid1" cp -p
141t1 b0 "$nameless_uid" "$nameless_gid1" cp -p
142t1 b1 "$nameless_uid" "$nameless_gid2" cp -p
143t1 c0 "$nameless_uid" "$nameless_gid1" cp -p
144t1 c1 "$nameless_uid" "$nameless_gid2" cp -p
145
146Exit $fail
147