1 files changed, 123 insertions, 0 deletions
diff --git a/tests/misc/chroot-credentials.sh b/tests/misc/chroot-credentials.sh
new file mode 100755
index 0000000..fd7cc9f
--- /dev/null
+++ b/tests/misc/chroot-credentials.sh
@@ -0,0 +1,123 @@
+#!/bin/sh
+# Verify that the credentials are changed correctly.
+
+# Copyright (C) 2009-2022 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 <https://www.gnu.org/licenses/>.
+
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ chroot
+
+require_root_
+
+EXIT_CANCELED=125
+
+grep '^#define HAVE_SETGROUPS 1' "$CONFIG_HEADER" >/dev/null \
+  && HAVE_SETGROUPS=1
+
+root=$(id -nu 0) || skip_ "Couldn't look up root username"
+
+# verify numeric IDs looked up similarly to names
+NON_ROOT_UID=$(id -u $NON_ROOT_USERNAME)
+NON_ROOT_GROUP=$NON_ROOT_GID # Used where we want name lookups to occur
+
+# "uid:" is supported (unlike chown etc.) since we treat it like "uid"
+chroot --userspec=$NON_ROOT_UID: / true || fail=1
+
+# verify that invalid groups are diagnosed
+for g in ' ' ',' '0trail'; do
+  returns_ $EXIT_CANCELED chroot --groups="$g" / id -G >invalid || fail=1
+  compare /dev/null invalid || fail=1
+done
+
+# Verify that root credentials are kept.
+test $(chroot / whoami) = "$root" || fail=1
+test "$(groups)" = "$(chroot / groups)" || fail=1
+
+# Verify that credentials are changed correctly.
+whoami_after_chroot=$(
+  chroot --userspec=$NON_ROOT_USERNAME:$NON_ROOT_GROUP / whoami
+)
+test "$whoami_after_chroot" != "$root" || fail=1
+
+# Verify that when specifying only a group we don't change the
+# list of supplemental groups
+test "$(chroot --userspec=:$NON_ROOT_GROUP / id -G)" = \
+     "$NON_ROOT_GID $(id -G)" || fail=1
+
+if ! test "$HAVE_SETGROUPS"; then
+  Exit $fail
+fi
+
+# Change all whitespaces to newlines, then sort the input.
+# Use for tests with more groups in 'id' output.
+num_sort() { tr -s ' ' '\n' | sort -n; }
+
+# Verify that there are no additional groups.
+id_G_after_chroot=$(
+  chroot --userspec=$NON_ROOT_USERNAME:$NON_ROOT_GROUP \
+    --groups=$NON_ROOT_GROUP / id -G
+)
+test "$id_G_after_chroot" = $NON_ROOT_GID || fail=1
+
+# Verify that when specifying only the user name we get all their groups
+test "$(chroot --userspec=$NON_ROOT_USERNAME / id -G | num_sort)" = \
+     "$(id -G $NON_ROOT_USERNAME | num_sort)" || fail=1
+
+# Ditto with trailing : on the user name.
+test "$(chroot --userspec=$NON_ROOT_USERNAME: / id -G | num_sort)" = \
+     "$(id -G $NON_ROOT_USERNAME | num_sort)" || fail=1
+
+# Verify that when specifying only the user and clearing supplemental groups
+# that we only get the primary group
+test "$(chroot --userspec=$NON_ROOT_USERNAME --groups='' / id -G)" = \
+     $NON_ROOT_GID || fail=1
+
+# Verify that when specifying only the UID we get all their groups
+test "$(chroot --userspec=$NON_ROOT_UID / id -G | num_sort)" = \
+     "$(id -G $NON_ROOT_USERNAME | num_sort)" || fail=1
+
+# Verify that when specifying only the user and clearing supplemental groups
+# that we only get the primary group. Note this variant with prepended '+'
+# results in no lookups in the name database which could be useful depending
+# on your chroot setup.
+test "$(chroot --userspec=+$NON_ROOT_UID:+$NON_ROOT_GID --groups='' / id -G)" =\
+     $NON_ROOT_GID || fail=1
+
+# Verify that when specifying only a group we get the current user ID
+test "$(chroot --userspec=:$NON_ROOT_GROUP / id -u)" = "$(id -u)" \
+  || fail=1
+
+# verify that arbitrary numeric IDs are supported
+test "$(chroot --userspec=1234:+5678 --groups=' +8765,4321' / id -G)" \
+  || fail=1
+
+# demonstrate that extraneous commas are supported
+test "$(chroot --userspec=1234:+5678 --groups=',8765,,4321,' / id -G)" \
+  || fail=1
+
+# demonstrate that --groups is not cumulative
+test "$(chroot --groups='invalid ignored' --groups='' / id -G)" \
+  || fail=1
+
+if ! id -u +12342; then
+  # Ensure supplemental groups cleared from some arbitrary unknown ID
+  test "$(chroot --userspec=+12342:+5678 / id -G)" = '5678' || fail=1
+
+  # Ensure we fail when we don't know what groups to set for an unknown ID
+  returns_ $EXIT_CANCELED chroot --userspec=+12342 / true || fail=1
+fi
+
+Exit $fail