HADOOP-14976. Set HADOOP_SHELL_EXECNAME explicitly in scripts.

hadoop-common-project/hadoop-common/src/main/bin/hadoop

@@ -15,8 +15,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# The name of the script being executed.
+HADOOP_SHELL_EXECNAME="hadoop"
 MYNAME="${BASH_SOURCE-$0}"
-HADOOP_SHELL_EXECNAME="${MYNAME##*/}"
 
 ## @description  build up the hadoop command's usage text.
 ## @audience     public
@@ -124,6 +125,10 @@ function hadoopcmd_case
       echo "HADOOP_TOOLS_HOME='${HADOOP_TOOLS_HOME}'"
       echo "HADOOP_TOOLS_DIR='${HADOOP_TOOLS_DIR}'"
       echo "HADOOP_TOOLS_LIB_JARS_DIR='${HADOOP_TOOLS_LIB_JARS_DIR}'"
+      if [[ -n "${QATESTMODE}" ]]; then
+        echo "MYNAME=${MYNAME}"
+        echo "HADOOP_SHELL_EXECNAME=${HADOOP_SHELL_EXECNAME}"
+      fi
       exit 0
     ;;
     fs)

hadoop-common-project/hadoop-common/src/test/scripts/hadoop_shell_execname.bats

@@ -0,0 +1,36 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+load hadoop-functions_test_helper
+
+# Setup minimal environment to invoke the 'hadoop' command.
+hadoopcommandsetup () {
+  export HADOOP_LIBEXEC_DIR="${TMP}/libexec"
+  export HADOOP_CONF_DIR="${TMP}/conf"
+  mkdir -p "${HADOOP_LIBEXEC_DIR}"
+  echo   ". \"${BATS_TEST_DIRNAME}/../../main/bin/hadoop-functions.sh\"" > "${HADOOP_LIBEXEC_DIR}/hadoop-config.sh"
+  chmod a+rx "${HADOOP_LIBEXEC_DIR}/hadoop-config.sh"
+}
+
+# Verify that the 'hadoop' command correctly infers MYNAME and
+# HADOOP_SHELL_EXECNAME
+@test "hadoop_shell_execname" {
+  hadoopcommandsetup
+  export QATESTMODE=unittest
+  run "${BATS_TEST_DIRNAME}/../../main/bin/hadoop" envvars
+  echo ">${output}<"
+  [[ ${output} =~ MYNAME=.*/hadoop ]]
+  [[ ${output} =~ HADOOP_SHELL_EXECNAME=hadoop ]]
+}

hadoop-hdfs-project/hadoop-hdfs/src/main/bin/hdfs

@@ -15,8 +15,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# The name of the script being executed.
+HADOOP_SHELL_EXECNAME="hdfs"
 MYNAME="${BASH_SOURCE-$0}"
-HADOOP_SHELL_EXECNAME="${MYNAME##*/}"
 
 ## @description  build up the hdfs command's usage text.
 ## @audience     public
@@ -126,6 +127,10 @@ function hdfscmd_case
       echo "HADOOP_TOOLS_HOME='${HADOOP_TOOLS_HOME}'"
       echo "HADOOP_TOOLS_DIR='${HADOOP_TOOLS_DIR}'"
       echo "HADOOP_TOOLS_LIB_JARS_DIR='${HADOOP_TOOLS_LIB_JARS_DIR}'"
+      if [[ -n "${QATESTMODE}" ]]; then
+        echo "MYNAME=${MYNAME}"
+        echo "HADOOP_SHELL_EXECNAME=${HADOOP_SHELL_EXECNAME}"
+      fi
       exit 0
     ;;
     ec)

hadoop-hdfs-project/hadoop-hdfs/src/test/scripts/hadoop_shell_execname.bats

@@ -0,0 +1,36 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+load hdfs-functions_test_helper
+
+# Setup minimal environment to invoke the 'hdfs' command.
+hdfscommandsetup () {
+  export HADOOP_LIBEXEC_DIR="${TMP}/libexec"
+  export HADOOP_CONF_DIR="${TMP}/conf"
+  mkdir -p "${HADOOP_LIBEXEC_DIR}"
+  echo   ". \"${BATS_TEST_DIRNAME}/../../../../../hadoop-common-project/hadoop-common/src/main/bin/hadoop-functions.sh\"" > "${HADOOP_LIBEXEC_DIR}/hdfs-config.sh"
+  chmod a+rx "${HADOOP_LIBEXEC_DIR}/hdfs-config.sh"
+}
+
+# Verify that the 'hdfs' command correctly infers MYNAME and
+# HADOOP_SHELL_EXECNAME
+@test "hadoop_shell_execname" {
+  hdfscommandsetup
+  export QATESTMODE=unittest
+  run "${BATS_TEST_DIRNAME}/../../main/bin/hdfs" envvars
+  echo ">${output}<"
+  [[ ${output} =~ MYNAME=.*/hdfs ]]
+  [[ ${output} =~ HADOOP_SHELL_EXECNAME=hdfs ]]
+}

hadoop-mapreduce-project/bin/mapred

@@ -15,8 +15,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# The name of the script being executed.
+HADOOP_SHELL_EXECNAME="mapred"
 MYNAME="${BASH_SOURCE-$0}"
-HADOOP_SHELL_EXECNAME="${MYNAME##*/}"
+
 
 ## @description  build up the mapred command's usage text.
 ## @audience     public

hadoop-yarn-project/hadoop-yarn/bin/yarn

@@ -15,8 +15,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# The name of the script being executed.
+HADOOP_SHELL_EXECNAME="yarn"
 MYNAME="${BASH_SOURCE-$0}"
-HADOOP_SHELL_EXECNAME="${MYNAME##*/}"
 
 ## @description  build up the yarn command's usage text.
 ## @audience     public