#!/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 . . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src print_ver_ env printenv # POSIX is clear that environ may, but need not be, sorted. # Environment variable values may contain newlines, which cannot be # observed by merely inspecting output from env. # Cygwin requires a minimal environment to launch new processes: execve # adds missing variables SYSTEMROOT and WINDIR, which show up in a # subsequent env. Cygwin also requires /bin to always be part of PATH, # and attempts to unset or reduce PATH may cause execve to fail. # # For these reasons, it is better to compare two outputs from distinct # programs that should be the same, rather than building an exp file. env -i PATH="$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