#!/bin/sh

# Verify behavior of printenv.

# Copyright (C) 2009-2018 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_ printenv

# Without arguments, printenv behaves like env.  Some shells provide

# printenv as a builtin, so we must invoke it via "env".

# But beware of $_, set by many shells to the last command run.

# Also, filter out LD_PRELOAD, which is set when running under valgrind.

# Note the apparently redundant "env  env": this is to ensure to get

# env's output the same way as that of printenv and works around a bug

# on aarch64 at least where libc's execvp reverses the order of the

# output.

env -- env | grep -Ev '^(_|LD_PRELOAD)=' > exp || framework_failure_

env -- printenv | grep -Ev '^(_|LD_PRELOAD)=' > out || fail=1

compare exp out || fail=1

# 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 printenv.

if env -- printenv | grep '^ENV_TEST' >/dev/null ; then

  skip_ "environment has potential interference from ENV_TEST*"

fi

# Printing a single variable's value.

returns_ 1 env -- printenv ENV_TEST > out || fail=1

compare /dev/null out || fail=1

echo a > exp || framework_failure_

ENV_TEST=a env -- printenv ENV_TEST > out || fail=1

compare exp out || fail=1

# Printing multiple variables.  Order follows command line.

ENV_TEST1=a ENV_TEST2=b env -- printenv ENV_TEST2 ENV_TEST1 ENV_TEST2 > out \

  || fail=1

ENV_TEST1=a ENV_TEST2=b env -- printenv ENV_TEST1 ENV_TEST2 >> out || fail=1

cat <<EOF > exp || framework_failure_

b

a

b

a

b

EOF

compare exp out || fail=1

# Exit status reflects missing variable, but remaining arguments processed.

export ENV_TEST1=a

returns_ 1 env -- printenv ENV_TEST2 ENV_TEST1 > out || fail=1

returns_ 1 env -- printenv ENV_TEST1 ENV_TEST2 >> out || fail=1

unset ENV_TEST1

cat <<EOF > exp || framework_failure_

a

a

EOF

compare exp out || fail=1

# Non-standard environment variable name.  Shells won't create it, but

# env can, and printenv must be able to deal with it.

echo b > exp || framework_failure_

env -- -a=b printenv -- -a > out || fail=1

compare exp out || fail=1

# Silently reject invalid env-var names.

# Bug present through coreutils 8.0.

returns_ 1 env a=b=c printenv a=b > out || fail=1

compare /dev/null out || fail=1

Exit $fail