1#!/bin/sh 2# Verify behavior of env -0 and printenv -0. 3 4# Copyright (C) 2009-2023 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. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src 20print_ver_ env printenv 21 22# POSIX is clear that environ may, but need not be, sorted. 23# Environment variable values may contain newlines, which cannot be 24# observed by merely inspecting output from env. 25# Cygwin requires a minimal environment to launch new processes: execve 26# adds missing variables SYSTEMROOT and WINDIR, which show up in a 27# subsequent env. Cygwin also requires /bin to always be part of PATH, 28# and attempts to unset or reduce PATH may cause execve to fail. 29# 30# For these reasons, it is better to compare two outputs from distinct 31# programs that should be the same, rather than building an exp file. 32env -i PATH="$PATH" env -0 > out1 || fail=1 33env -i PATH="$PATH" printenv -0 > out2 || fail=1 34compare out1 out2 || fail=1 35env -i PATH="$PATH" env --null > out2 || fail=1 36compare out1 out2 || fail=1 37env -i PATH="$PATH" printenv --null > out2 || fail=1 38compare out1 out2 || fail=1 39 40# env -0 does not work if a command is specified. 41returns_ 125 env -0 echo hi > out || fail=1 42compare /dev/null out || fail=1 43 44# Test env -0 on a one-variable environment. 45printf 'a=b\nc=\0' > exp || framework_failure_ 46env -i -0 "$(printf 'a=b\nc=')" > out || fail=1 47compare exp out || fail=1 48 49# Test printenv -0 on particular values. 50printf 'b\nc=\0' > exp || framework_failure_ 51env "$(printf 'a=b\nc=')" printenv -0 a > out || fail=1 52compare exp out || fail=1 53returns_ 1 env -u a printenv -0 a > out || fail=1 54compare /dev/null out || fail=1 55returns_ 1 env -u b "$(printf 'a=b\nc=')" printenv -0 b a > out || fail=1 56compare exp out || fail=1 57 58Exit $fail 59