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authorEric Blake <ebb9@byu.net>2009-10-27 06:36:40 -0600
committerEric Blake <ebb9@byu.net>2009-10-27 19:55:35 -0600
commitd6de2f198ef0f59f5210af0bf9bcf42687386a04 (patch)
treea1c5072f0b9aae40c24263d03e42ef92d81edbc9 /tests/misc/env-null
parent1a813420896317aecf5598f76c852195796e534b (diff)
downloadcoreutils-d6de2f198ef0f59f5210af0bf9bcf42687386a04.tar.xz
env, printenv: add -0/--null option
Allows for unambiguous processing when environment values (or even non-portable names!) contain newline. * src/env.c (longopts): Add new option. (usage): Document it. (main): Implement it. * src/printenv.c (longopts): New variable. (usage): Document new option. (main): Implement it. * doc/coreutils.texi (Common options): New macro optNull. (du invocation, env invocation, printenv invocation): Use it. * NEWS: Mention this. * tests/misc/env-null: New test. * tests/Makefile.am (TESTS): Run it.
Diffstat (limited to 'tests/misc/env-null')
-rwxr-xr-xtests/misc/env-null69
1 files changed, 69 insertions, 0 deletions
diff --git a/tests/misc/env-null b/tests/misc/env-null
new file mode 100755
index 000000000..432c6594e
--- /dev/null
+++ b/tests/misc/env-null
@@ -0,0 +1,69 @@
+#!/bin/sh
+# Verify behavior of env -0 and printenv -0.
+
+# Copyright (C) 2009 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 <http://www.gnu.org/licenses/>.
+
+
+if test "$VERBOSE" = yes; then
+ set -x
+ env --version
+ env -- printenv --version
+fi
+
+. $srcdir/test-lib.sh
+
+fail=0
+
+# POSIX is clear that environ may, but need not be, sorted.
+# Environment variable values may contain newlines, which cannot be
+# observed by merely inspecting output from env.
+# Cygwin requires a minimal environment to launch new processes: execve
+# adds missing variables SYSTEMROOT and WINDIR, which show up in a
+# subsequent env. Cygwin also requires /bin to always be part of PATH,
+# and attempts to unset or reduce PATH may cause execve to fail.
+#
+# For these reasons, it is better to compare two outputs from distinct
+# programs that should be the same, rather than building an exp file.
+env -i PATH="$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.
+env -0 echo hi > out
+test $? = 125 || fail=1
+test -s out && fail=1
+
+# Test env -0 on a one-variable environment.
+printf 'a=b\nc=\0' > exp || framework_failure
+env -i -0 "$(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
+env -u a printenv -0 a > out
+test $? = 1 || fail=1
+test -s out && fail=1
+env -u b "$(printf 'a=b\nc=')" printenv -0 b a > out
+test $? = 1 || fail=1
+compare exp out || fail=1
+
+Exit $fail