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Posted to yarn-commits@hadoop.apache.org by at...@apache.org on 2013/02/22 19:36:24 UTC
svn commit: r1449161 -
/hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/bin/yarn
Author: atm
Date: Fri Feb 22 18:36:24 2013
New Revision: 1449161
URL: http://svn.apache.org/r1449161
Log:
HADOOP-9267. hadoop -help, -h, --help should show usage instructions. Contributed by Andrew Wang.
Modified:
hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/bin/yarn
Modified: hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/bin/yarn
URL: http://svn.apache.org/viewvc/hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/bin/yarn?rev=1449161&r1=1449160&r2=1449161&view=diff
==============================================================================
--- hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/bin/yarn (original)
+++ hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/bin/yarn Fri Feb 22 18:36:24 2013
@@ -53,13 +53,7 @@ DEFAULT_LIBEXEC_DIR="$bin"/../libexec
HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
. $HADOOP_LIBEXEC_DIR/yarn-config.sh
-cygwin=false
-case "`uname`" in
-CYGWIN*) cygwin=true;;
-esac
-
-# if no args specified, show usage
-if [ $# = 0 ]; then
+function print_usage(){
echo "Usage: yarn [--config confdir] COMMAND"
echo "where COMMAND is one of:"
echo " resourcemanager run the ResourceManager"
@@ -76,6 +70,16 @@ if [ $# = 0 ]; then
echo " or"
echo " CLASSNAME run the class named CLASSNAME"
echo "Most commands print help when invoked w/o parameters."
+}
+
+cygwin=false
+case "`uname`" in
+CYGWIN*) cygwin=true;;
+esac
+
+# if no args specified, show usage
+if [ $# = 0 ]; then
+ print_usage
exit 1
fi
@@ -83,6 +87,14 @@ fi
COMMAND=$1
shift
+case $COMMAND in
+ # usage flags
+ --help|-help|-h)
+ print_usage
+ exit
+ ;;
+esac
+
if [ -f "${YARN_CONF_DIR}/yarn-env.sh" ]; then
. "${YARN_CONF_DIR}/yarn-env.sh"
fi