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Diffstat (limited to 'tests/misc/env-null.sh')
| -rwxr-xr-x | tests/misc/env-null.sh | 58 |
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..e5a6627 --- /dev/null +++ b/tests/misc/env-null.sh @@ -0,0 +1,58 @@ +#!/bin/sh +# Verify behavior of env -0 and printenv -0. + +# Copyright (C) 2009-2018 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/>. + +. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src +print_ver_ env printenv + +# POSIX is clear that environ may, but need not be, sorted. +# Environment variable values may contain newlines, which cannot be +# observed by merely inspecting output from env. +# Cygwin requires a minimal environment to launch new processes: execve +# adds missing variables SYSTEMROOT and WINDIR, which show up in a +# subsequent env. Cygwin also requires /bin to always be part of PATH, +# and attempts to unset or reduce PATH may cause execve to fail. +# +# For these reasons, it is better to compare two outputs from distinct +# programs that should be the same, rather than building an exp file. +env -i PATH="$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 |