grep branch, master, updated. v2.10-74-ga41991d

[Paul Eggert]

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http://git.savannah.gnu.org/cgit/grep.git/commit/?id=a41991d620c7663c0027e25a708c80a70bb70646


commit a41991d620c7663c0027e25a708c80a70bb70646
Author: Paul Eggert <address@hidden>
Date:   Mon Feb 13 00:25:55 2012 -0800

    tests: fix loop in epipe test
    
    * tests/epipe: Don't loop forever if the bug is present.
    Problem reported by Jaroslav Skarvada.

diff --git a/tests/epipe b/tests/epipe
index 1d9ef05..3b568e3 100755
--- a/tests/epipe
+++ b/tests/epipe
@@ -5,8 +5,17 @@
 . "${srcdir=.}/init.sh"; path_prepend_ ../src
 
 if
+   # Use awk to output a bounded amount of data to the grep in question,
+   # so that the test doesn't loop forever if grep is buggy.
+   # Use an explicit /dev/null for the benefit of older (pre-POSIX) awks.
+   #
+   # Carefully close fd 3 when not needed, as a sanity check.
+   #
+   # Do not use "trap - PIPE" or "trap 'something' PIPE" here, since we may
+   # be running in an environment where SIGPIPE is ignored, and in such an
+   # environment POSIX says that "trap '' PIPE" is all we can do portably.
    (
-     while ls -al; do :; done 3>&- |
+     ${AWK-awk} 'BEGIN { for (i=0; i<1000000; i++) print i; }' /dev/null 3>&- |
      (trap '' PIPE; exec grep . 2>&3 3>&-) |
      :
    ) 3>&1 | (

-----------------------------------------------------------------------

Summary of changes:
 tests/epipe |   11 ++++++++++-
 1 files changed, 10 insertions(+), 1 deletions(-)


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