1 files changed, 58 insertions, 0 deletions
diff --git a/tests/misc/env-null.sh b/tests/misc/env-null.sh
new file mode 100755
index 0000000..b770f51
--- /dev/null
+++ b/tests/misc/env-null.sh
@@ -0,0 +1,58 @@
+#!/bin/sh
+# Verify behavior of env -0 and printenv -0.
+
+# Copyright (C) 2009-2020 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/>.
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ env printenv
+
+# POSIX is clear that environ may, but need not be, sorted.
+# Environment variable values may contain newlines, which cannot be
+# observed by merely inspecting output from env.
+# Cygwin requires a minimal environment to launch new processes: execve
+# adds missing variables SYSTEMROOT and WINDIR, which show up in a
+# subsequent env.  Cygwin also requires /bin to always be part of PATH,
+# and attempts to unset or reduce PATH may cause execve to fail.
+#
+# For these reasons, it is better to compare two outputs from distinct
+# programs that should be the same, rather than building an exp file.
+env -i PATH="$PATH" env -0 > out1 || fail=1
+env -i PATH="$PATH" printenv -0 > out2 || fail=1
+compare out1 out2 || fail=1
+env -i PATH="$PATH" env --null > out2 || fail=1
+compare out1 out2 || fail=1
+env -i PATH="$PATH" printenv --null > out2 || fail=1
+compare out1 out2 || fail=1
+
+# env -0 does not work if a command is specified.
+returns_ 125 env -0 echo hi > out || fail=1
+compare /dev/null out || fail=1
+
+# Test env -0 on a one-variable environment.
+printf 'a=b\nc=\0' > exp || framework_failure_
+env -i -0 "$(printf 'a=b\nc=')" > out || fail=1
+compare exp out || fail=1
+
+# Test printenv -0 on particular values.
+printf 'b\nc=\0' > exp || framework_failure_
+env "$(printf 'a=b\nc=')" printenv -0 a > out || fail=1
+compare exp out || fail=1
+returns_ 1 env -u a printenv -0 a > out || fail=1
+compare /dev/null out || fail=1
+returns_ 1 env -u b "$(printf 'a=b\nc=')" printenv -0 b a > out || fail=1
+compare exp out || fail=1
+
+Exit $fail