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According to Jim Meyering on 10/28/2009 5:56 AM:
> And to add to the fun, on Solaris 10 I see this baloney:
>
> $ /bin/env a=b=c /usr/ucb/printenv a=b
> b=c
Wow. So now that tcsh isn't the only other implementation, and since the
behavior is different between the two buggy implementations, we're
justified in this patch. OK to commit?
- --
Don't work too hard, make some time for fun as well!
Eric Blake e...@byu.net
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>From d0c5ae636c07babdf2041f204c71c212ecd99684 Mon Sep 17 00:00:00 2001
From: Eric Blake <e...@byu.net>
Date: Wed, 28 Oct 2009 06:21:24 -0600
Subject: [PATCH] printenv: ignore bogus variable names
Exposed by env a=b=c printenv a=b.
* src/printenv.c (main): Silently reject = in names.
* tests/misc/printenv: Test for it.
* NEWS: Document this.
---
NEWS | 3 ++-
src/printenv.c | 4 ++++
tests/misc/printenv | 6 ++++++
3 files changed, 12 insertions(+), 1 deletions(-)
diff --git a/NEWS b/NEWS
index 442ce13..35d1413 100644
--- a/NEWS
+++ b/NEWS
@@ -9,7 +9,8 @@ GNU coreutils NEWS -*-
outline -*-
[bug introduced in coreutils-8.0]
env -u A=B now fails, rather than silently adding A to the
- environment. [the bug dates back to the initial implementation]
+ environment. Likewise, printenv A=B silently ignores the invalid
+ name. [the bugs date back to the initial implementation]
md5sum now prints checksums atomically so that concurrent
processes will not intersperse their output.
diff --git a/src/printenv.c b/src/printenv.c
index 6bc03f4..4c83972 100644
--- a/src/printenv.c
+++ b/src/printenv.c
@@ -126,6 +126,10 @@ main (int argc, char **argv)
{
bool matched = false;
+ /* 'printenv a=b' is silent, even if 'a=b=c' is in environ. */
+ if (strchr (argv[i], '='))
+ continue;
+
for (env = environ; *env; ++env)
{
ep = *env;
diff --git a/tests/misc/printenv b/tests/misc/printenv
index bbda1db..bc51fca 100755
--- a/tests/misc/printenv
+++ b/tests/misc/printenv
@@ -77,4 +77,10 @@ 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.
+env a=b=c printenv a=b > out
+test $? = 1 || fail=1
+test -s out && fail=1
+
Exit $fail
--
1.6.5.rc1
