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authorEric Blake <eblake@redhat.com>2016-03-04 09:47:33 -0700
committerEric Blake <eblake@redhat.com>2016-03-04 11:55:22 -0700
commit6475c514550bc1fbdb3410485312211726765798 (patch)
treeb67548272bed9a41238eef29e415a7e5da06ef8c /src
parenta7f5d3d6d671bb4e9117b1f72971a19eed135fed (diff)
downloadcoreutils-6475c514550bc1fbdb3410485312211726765798.tar.xz
test: Document that -a and -o are undesirable
POSIX recommends avoiding -a and -o, for good reason. src/test.c (usage): Mention that inherent ambiguities exist with binary -a and -o. Problem reported by Martin Gebert in: http://bugs.gnu.org/22909
Diffstat (limited to 'src')
-rw-r--r--src/test.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/test.c b/src/test.c
index 36817d24e..8ac7467f1 100644
--- a/src/test.c
+++ b/src/test.c
@@ -790,6 +790,11 @@ INTEGER may also be -l STRING, which evaluates to the length of STRING.\n\
"), stdout);
fputs (_("\
\n\
+NOTE: Binary -a and -o are inherently ambiguous. Use 'test EXPR1 && test\n\
+EXPR2' or 'test EXPR1 || test EXPR2' instead.\n\
+"), stdout);
+ fputs (_("\
+\n\
NOTE: [ honors the --help and --version options, but test does not.\n\
test treats each of those as it treats any other nonempty STRING.\n\
"), stdout);