MAPREDUCE-5033. mapred shell script should respect usage flags (--help -help -h). Contributed by Andrew Wang.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1450584 13f79535-47bb-0310-9956-ffa450edef68
2013-02-27 02:42:38 +00:00 · 2013-02-27 02:42:38 +00:00 · 42e987f11e
parent 12985ea6f9
commit 42e987f11e
2 changed files with 11 additions and 0 deletions
--- a/hadoop-mapreduce-project/CHANGES.txt
+++ b/hadoop-mapreduce-project/CHANGES.txt
@ -163,6 +163,9 @@ Release 2.0.4-beta - UNRELEASED

  IMPROVEMENTS

+    MAPREDUCE-5033. mapred shell script should respect usage flags
+    (--help -help -h). (Andrew Wang via atm)
+
  OPTIMIZATIONS

  BUG FIXES
--- a/hadoop-mapreduce-project/bin/mapred
+++ b/hadoop-mapreduce-project/bin/mapred
@ -50,6 +50,14 @@ fi
 COMMAND=$1
 shift

+case $COMMAND in
+  # usage flags
+  --help|-help|-h)
+    print_usage
+    exit
+    ;;
+esac
+
 if [ "$COMMAND" = "job" ] ; then
  CLASS=org.apache.hadoop.mapred.JobClient
 elif [ "$COMMAND" = "queue" ] ; then