The HP-UX /bin/sh using command tracing (set -x) and stderr
redirection behaves badly when stderr is redirected before stdout. I
tested on HP-UX 10.20, 11.0, 11.11, and 11.23 and all had this
problem. Here is an example:
$ /bin/sh -xc ': 2>/tmp/err >/dev/null'
+ :
+ 2> /tmp/err $ ...hanging prompt without previous newline...
$ cat /tmp/err
1> /tmp/out
This causes the i-link-no test to always fail on HP-UX when run with
VERBOSE=yes which sets 'set -x'. This test passes otherwise.
+ fail=0
+ mv --reply=no a/bar a/foo b
+ 2> err + cat
+ 0< /var/tmp/sh9830.2 1> exp
+ cat
+ 0< /var/tmp/sh9830.3 1> exp_err
+ cmp err exp_err
err exp_err differ: char 1, line 1
+ fail=1
+ test 1 = 1
+ diff err exp_err
+ 2> /dev/null
1d0
< 1> out
+ cmp out exp
But the other file redirection ordering works. Fortunately this is
the more typical ordering.
/bin/sh -xc ': >/tmp/out 2>/tmp/err'
cat /tmp/err
The trivial workaround for this HP-UX /bin/sh problem causing this
test failure when VERBOSE=yes is to reorder the redirections. If
stderr is redirected last then everything works.
Bob
* Work around HP-UX /bin/sh tracing problem (set -x when
VERBOSE=yes) when stderr is redirected before stdout causing
shell tracing of the stdout redirection to be written to the
stderr file. Avoid problem and test failure on HP-UX by
redirecting stderr last.
Index: I-link-no
===================================================================
RCS file: /sources/coreutils/coreutils/tests/mv/i-link-no,v
retrieving revision 1.7
diff -u -r1.7 i-link-no
--- i-link-no 3 Jul 2005 16:54:37 -0000 1.7
+++ i-link-no 27 Jun 2006 23:32:55 -0000
@@ -31,7 +31,7 @@
fail=0
-mv --reply=no a/bar a/foo b 2> err > out || fail=1
+mv --reply=no a/bar a/foo b > out 2> err || fail=1
cat <<EOF > exp
EOF
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