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From asur...@apache.org
Subject [06/50] [abbrv] hadoop git commit: YARN-6033. Add support for sections in container-executor configuration file. (Varun Vasudev via wandga)
Date Wed, 16 Aug 2017 00:28:00 GMT
YARN-6033. Add support for sections in container-executor configuration file. (Varun Vasudev via wandga)

Change-Id: Ibc6d2a959debe5d8ff2b51504149742449d1f1da


Project: http://git-wip-us.apache.org/repos/asf/hadoop/repo
Commit: http://git-wip-us.apache.org/repos/asf/hadoop/commit/ec694145
Tree: http://git-wip-us.apache.org/repos/asf/hadoop/tree/ec694145
Diff: http://git-wip-us.apache.org/repos/asf/hadoop/diff/ec694145

Branch: refs/heads/YARN-6592
Commit: ec694145cf9c0ade7606813871ca2a4a371def8e
Parents: 63cfcb9
Author: Wangda Tan <wangda@apache.org>
Authored: Wed Aug 9 10:51:29 2017 -0700
Committer: Wangda Tan <wangda@apache.org>
Committed: Wed Aug 9 10:51:29 2017 -0700

----------------------------------------------------------------------
 .../hadoop-yarn-server-nodemanager/pom.xml      |  38 ++
 .../src/CMakeLists.txt                          |  22 +
 .../container-executor/impl/configuration.c     | 672 +++++++++++++------
 .../container-executor/impl/configuration.h     | 182 +++--
 .../impl/container-executor.c                   |  39 +-
 .../impl/container-executor.h                   |  52 +-
 .../container-executor/impl/get_executable.c    |   1 +
 .../main/native/container-executor/impl/main.c  |  17 +-
 .../main/native/container-executor/impl/util.c  | 134 ++++
 .../main/native/container-executor/impl/util.h  | 115 ++++
 .../test-configurations/configuration-1.cfg     |  31 +
 .../test-configurations/configuration-2.cfg     |  28 +
 .../test/test-configurations/old-config.cfg     |  25 +
 .../test/test-container-executor.c              |  15 +-
 .../test/test_configuration.cc                  | 432 ++++++++++++
 .../native/container-executor/test/test_main.cc |  29 +
 .../native/container-executor/test/test_util.cc | 138 ++++
 17 files changed, 1649 insertions(+), 321 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/hadoop/blob/ec694145/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/pom.xml
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/pom.xml b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/pom.xml
index 28ee0d9..a50a769 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/pom.xml
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/pom.xml
@@ -215,6 +215,44 @@
                   <results>${project.build.directory}/native-results</results>
                 </configuration>
               </execution>
+              <execution>
+                <id>cetest</id>
+                <goals><goal>cmake-test</goal></goals>
+                <phase>test</phase>
+                <configuration>
+                  <!-- this should match the xml name without the TEST-part down below -->
+                  <testName>cetest</testName>
+                  <workingDirectory>${project.build.directory}/native/test</workingDirectory>
+                  <source>${basedir}/src</source>
+                  <binary>${project.build.directory}/native/test/cetest</binary>
+                  <args>
+                    <arg>--gtest_filter=-Perf.</arg>
+                    <arg>--gtest_output=xml:${project.build.directory}/surefire-reports/TEST-cetest.xml</arg>
+                  </args>
+                  <results>${project.build.directory}/surefire-reports</results>
+                </configuration>
+              </execution>
+            </executions>
+          </plugin>
+          <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-antrun-plugin</artifactId>
+            <executions>
+              <execution>
+                <id>make</id>
+                <phase>compile</phase>
+                <goals>
+                  <goal>run</goal>
+                </goals>
+                <configuration>
+                  <target>
+                    <copy todir="${project.build.directory}/native/test/"
+                      overwrite="true">
+                      <fileset dir="${basedir}/src/main/native/container-executor/resources/test" />
+                    </copy>
+                  </target>
+                </configuration>
+              </execution>
             </executions>
           </plugin>
         </plugins>

http://git-wip-us.apache.org/repos/asf/hadoop/blob/ec694145/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/CMakeLists.txt
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/CMakeLists.txt b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/CMakeLists.txt
index 5b52536..100d7ca 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/CMakeLists.txt
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/CMakeLists.txt
@@ -19,6 +19,9 @@ cmake_minimum_required(VERSION 2.6 FATAL_ERROR)
 list(APPEND CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/../../../../../hadoop-common-project/hadoop-common)
 include(HadoopCommon)
 
+# Set gtest path
+set(GTEST_SRC_DIR ${CMAKE_SOURCE_DIR}/../../../../../hadoop-common-project/hadoop-common/src/main/native/gtest)
+
 # determine if container-executor.conf.dir is an absolute
 # path in case the OS we're compiling on doesn't have
 # a hook in get_executable. We'll use this define
@@ -80,12 +83,20 @@ endfunction()
 include_directories(
     ${CMAKE_CURRENT_SOURCE_DIR}
     ${CMAKE_BINARY_DIR}
+    ${GTEST_SRC_DIR}/include
     main/native/container-executor
     main/native/container-executor/impl
 )
+# add gtest as system library to suppress gcc warnings
+include_directories(SYSTEM ${GTEST_SRC_DIR}/include)
+
 configure_file(${CMAKE_SOURCE_DIR}/config.h.cmake ${CMAKE_BINARY_DIR}/config.h)
 
+add_library(gtest ${GTEST_SRC_DIR}/gtest-all.cc)
+set_target_properties(gtest PROPERTIES COMPILE_FLAGS "-w")
+
 add_library(container
+    main/native/container-executor/impl/util.c
     main/native/container-executor/impl/configuration.c
     main/native/container-executor/impl/container-executor.c
     main/native/container-executor/impl/get_executable.c
@@ -95,9 +106,11 @@ add_library(container
 add_executable(container-executor
     main/native/container-executor/impl/main.c
 )
+
 target_link_libraries(container-executor
     container
 )
+
 output_directory(container-executor target/usr/local/bin)
 
 add_executable(test-container-executor
@@ -107,3 +120,12 @@ target_link_libraries(test-container-executor
     container ${EXTRA_LIBS}
 )
 output_directory(test-container-executor target/usr/local/bin)
+
+# unit tests for container executor
+add_executable(cetest
+        main/native/container-executor/impl/util.c
+        main/native/container-executor/test/test_configuration.cc
+        main/native/container-executor/test/test_main.cc
+        main/native/container-executor/test/test_util.cc)
+target_link_libraries(cetest gtest)
+output_directory(cetest test)

http://git-wip-us.apache.org/repos/asf/hadoop/blob/ec694145/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/configuration.c
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/configuration.c b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/configuration.c
index a6d7a9c..12dbc4c 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/configuration.c
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/configuration.c
@@ -20,35 +20,55 @@
 #include <libgen.h>
 
 #include "configuration.h"
-#include "container-executor.h"
+#include "util.h"
 
+#define __STDC_FORMAT_MACROS
 #include <inttypes.h>
 #include <errno.h>
 #include <unistd.h>
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/stat.h>
-#include <sys/types.h>
-#include <limits.h>
-#include <ctype.h>
 
 #define MAX_SIZE 10
 
+static const char COMMENT_BEGIN_CHAR = '#';
+static const char SECTION_LINE_BEGIN_CHAR = '[';
+static const char SECTION_LINE_END_CHAR = ']';
+
+//clean up method for freeing section
+void free_section(struct section *section) {
+  int i = 0;
+  for (i = 0; i < section->size; i++) {
+    if (section->kv_pairs[i]->key != NULL) {
+      free((void *) section->kv_pairs[i]->key);
+    }
+    if (section->kv_pairs[i]->value != NULL) {
+      free((void *) section->kv_pairs[i]->value);
+    }
+    free(section->kv_pairs[i]);
+  }
+  if (section->kv_pairs) {
+    free(section->kv_pairs);
+    section->kv_pairs = NULL;
+  }
+  if (section->name) {
+    free(section->name);
+    section->name = NULL;
+  }
+  section->size = 0;
+}
+
 //clean up method for freeing configuration
-void free_configurations(struct configuration *cfg) {
+void free_configuration(struct configuration *cfg) {
   int i = 0;
   for (i = 0; i < cfg->size; i++) {
-    if (cfg->confdetails[i]->key != NULL) {
-      free((void *)cfg->confdetails[i]->key);
+    if (cfg->sections[i] != NULL) {
+      free_section(cfg->sections[i]);
     }
-    if (cfg->confdetails[i]->value != NULL) {
-      free((void *)cfg->confdetails[i]->value);
-    }
-    free(cfg->confdetails[i]);
   }
-  if (cfg->size > 0) {
-    free(cfg->confdetails);
+  if (cfg->sections) {
+    free(cfg->sections);
   }
   cfg->size = 0;
 }
@@ -65,13 +85,13 @@ static int is_only_root_writable(const char *file) {
   }
   if (file_stat.st_uid != 0) {
     fprintf(ERRORFILE, "File %s must be owned by root, but is owned by %" PRId64 "\n",
-            file, (int64_t)file_stat.st_uid);
+            file, (int64_t) file_stat.st_uid);
     return 0;
   }
   if ((file_stat.st_mode & (S_IWGRP | S_IWOTH)) != 0) {
     fprintf(ERRORFILE,
-	    "File %s must not be world or group writable, but is %03lo\n",
-	    file, (unsigned long)file_stat.st_mode & (~S_IFMT));
+            "File %s must not be world or group writable, but is %03lo\n",
+            file, (unsigned long) file_stat.st_mode & (~S_IFMT));
     return 0;
   }
   return 1;
@@ -82,9 +102,9 @@ static int is_only_root_writable(const char *file) {
  *
  * NOTE: relative path names are resolved relative to the second argument not getwd(3)
  */
-char *resolve_config_path(const char* file_name, const char *root) {
+char *resolve_config_path(const char *file_name, const char *root) {
   const char *real_fname = NULL;
-  char buffer[EXECUTOR_PATH_MAX*2 + 1];
+  char buffer[EXECUTOR_PATH_MAX * 2 + 1];
 
   if (file_name[0] == '/') {
     real_fname = file_name;
@@ -96,7 +116,7 @@ char *resolve_config_path(const char* file_name, const char *root) {
 #ifdef HAVE_CANONICALIZE_FILE_NAME
   char * ret = (real_fname == NULL) ? NULL : canonicalize_file_name(real_fname);
 #else
-  char * ret = (real_fname == NULL) ? NULL : realpath(real_fname, NULL);
+  char *ret = (real_fname == NULL) ? NULL : realpath(real_fname, NULL);
 #endif
 #ifdef DEBUG
   fprintf(stderr,"ret = %s\n", ret);
@@ -112,10 +132,19 @@ char *resolve_config_path(const char* file_name, const char *root) {
  * configuration and potentially cause damage.
  * returns 0 if permissions are ok
  */
-int check_configuration_permissions(const char* file_name) {
+int check_configuration_permissions(const char *file_name) {
+  if (!file_name) {
+    return -1;
+  }
+
   // copy the input so that we can modify it with dirname
-  char* dir = strdup(file_name);
-  char* buffer = dir;
+  char *dir = strdup(file_name);
+  if (!dir) {
+    fprintf(stderr, "Failed to make a copy of filename in %s.\n", __func__);
+    return -1;
+  }
+
+  char *buffer = dir;
   do {
     if (!is_only_root_writable(dir)) {
       free(buffer);
@@ -128,167 +157,396 @@ int check_configuration_permissions(const char* file_name) {
 }
 
 /**
- * Trim whitespace from beginning and end.
-*/
-char* trim(char* input)
-{
-    char *val_begin;
-    char *val_end;
-    char *ret;
-
-    if (input == NULL) {
-      return NULL;
+ * Read a line from the the config file and return it without the newline.
+ * The caller must free the memory allocated.
+ */
+static char *read_config_line(FILE *conf_file) {
+  char *line = NULL;
+  size_t linesize = 100000;
+  ssize_t size_read = 0;
+  size_t eol = 0;
+
+  line = (char *) malloc(linesize);
+  if (line == NULL) {
+    fprintf(ERRORFILE, "malloc failed while reading configuration file.\n");
+    exit(OUT_OF_MEMORY);
+  }
+  size_read = getline(&line, &linesize, conf_file);
+
+  //feof returns true only after we read past EOF.
+  //so a file with no new line, at last can reach this place
+  //if size_read returns negative check for eof condition
+  if (size_read == -1) {
+    free(line);
+    line = NULL;
+    if (!feof(conf_file)) {
+      fprintf(ERRORFILE, "Line read returned -1 without eof\n");
+      exit(INVALID_CONFIG_FILE);
+    }
+  } else {
+    eol = strlen(line) - 1;
+    if (line[eol] == '\n') {
+      //trim the ending new line
+      line[eol] = '\0';
     }
+  }
+  return line;
+}
 
-    val_begin = input;
-    val_end = input + strlen(input);
+/**
+ * Return if the given line is a comment line.
+ *
+ * @param line the line to check
+ *
+ * @return 1 if the line is a comment line, 0 otherwise
+ */
+static int is_comment_line(const char *line) {
+  if (line != NULL) {
+    return (line[0] == COMMENT_BEGIN_CHAR);
+  }
+  return 0;
+}
 
-    while (val_begin < val_end && isspace(*val_begin))
-      val_begin++;
-    while (val_end > val_begin && isspace(*(val_end - 1)))
-      val_end--;
+/**
+ * Return if the given line is a section start line.
+ *
+ * @param line the line to check
+ *
+ * @return 1 if the line is a section start line, 0 otherwise
+ */
+static int is_section_start_line(const char *line) {
+  size_t len = 0;
+  if (line != NULL) {
+    len = strlen(line) - 1;
+    return (line[0] == SECTION_LINE_BEGIN_CHAR
+            && line[len] == SECTION_LINE_END_CHAR);
+  }
+  return 0;
+}
 
-    ret = (char *) malloc(
-            sizeof(char) * (val_end - val_begin + 1));
-    if (ret == NULL) {
-      fprintf(ERRORFILE, "Allocation error\n");
+/**
+ * Return the name of the section from the given section start line. The
+ * caller must free the memory used.
+ *
+ * @param line the line to extract the section name from
+ *
+ * @return string with the name of the section, NULL otherwise
+ */
+static char *get_section_name(const char *line) {
+  char *name = NULL;
+  size_t len;
+
+  if (is_section_start_line(line)) {
+    // length of the name is the line - 2(to account for '[' and ']')
+    len = strlen(line) - 2;
+    name = (char *) malloc(len + 1);
+    if (name == NULL) {
+      fprintf(ERRORFILE, "malloc failed while reading section name.\n");
       exit(OUT_OF_MEMORY);
     }
-
-    strncpy(ret, val_begin, val_end - val_begin);
-    ret[val_end - val_begin] = '\0';
-    return ret;
+    strncpy(name, line + sizeof(char), len);
+    name[len] = '\0';
+  }
+  return name;
 }
 
-void read_config(const char* file_name, struct configuration *cfg) {
-  FILE *conf_file;
-  char *line;
+/**
+ * Read an entry for the section from the line. Function returns 0 if an entry
+ * was found, non-zero otherwise. Return values less than 0 indicate an error
+ * with the config file.
+ *
+ * @param line the line to read the entry from
+ * @param section the struct to read the entry into
+ *
+ * @return 0 if an entry was found
+ *         <0 for config file errors
+ *         >0 for issues such as empty line
+ *
+ */
+static int read_section_entry(const char *line, struct section *section) {
   char *equaltok;
   char *temp_equaltok;
-  size_t linesize = 1000;
-  int size_read = 0;
-
-  if (file_name == NULL) {
-    fprintf(ERRORFILE, "Null configuration filename passed in\n");
-    exit(INVALID_CONFIG_FILE);
+  const char *splitter = "=";
+  char *buffer;
+  size_t len = 0;
+  if (line == NULL || section == NULL) {
+    fprintf(ERRORFILE, "NULL params passed to read_section_entry");
+    return -1;
+  }
+  len = strlen(line);
+  if (len == 0) {
+    return 1;
+  }
+  if ((section->size) % MAX_SIZE == 0) {
+    section->kv_pairs = (struct kv_pair **) realloc(
+        section->kv_pairs,
+        sizeof(struct kv_pair *) * (MAX_SIZE + section->size));
+    if (section->kv_pairs == NULL) {
+      fprintf(ERRORFILE,
+              "Failed re-allocating memory for configuration items\n");
+      exit(OUT_OF_MEMORY);
+    }
   }
 
-  #ifdef DEBUG
-    fprintf(LOGFILE, "read_config :Conf file name is : %s \n", file_name);
-  #endif
+  buffer = strdup(line);
+  if (!buffer) {
+    fprintf(ERRORFILE, "Failed to allocating memory for line, %s\n", __func__);
+    exit(OUT_OF_MEMORY);
+  }
 
-  //allocate space for ten configuration items.
-  cfg->confdetails = (struct confentry **) malloc(sizeof(struct confentry *)
-      * MAX_SIZE);
-  cfg->size = 0;
-  conf_file = fopen(file_name, "r");
-  if (conf_file == NULL) {
-    fprintf(ERRORFILE, "Invalid conf file provided : %s \n", file_name);
+  //tokenize first to get key and list of values.
+  //if no equals is found ignore this line, can be an empty line also
+  equaltok = strtok_r(buffer, splitter, &temp_equaltok);
+  if (equaltok == NULL) {
+    fprintf(ERRORFILE, "Error with line '%s', no '=' found\n", buffer);
     exit(INVALID_CONFIG_FILE);
   }
-  while(!feof(conf_file)) {
-    line = (char *) malloc(linesize);
-    if(line == NULL) {
-      fprintf(ERRORFILE, "malloc failed while reading configuration file.\n");
-      exit(OUT_OF_MEMORY);
+  section->kv_pairs[section->size] = (struct kv_pair *) malloc(
+      sizeof(struct kv_pair));
+  if (section->kv_pairs[section->size] == NULL) {
+    fprintf(ERRORFILE, "Failed allocating memory for single section item\n");
+    exit(OUT_OF_MEMORY);
+  }
+  memset(section->kv_pairs[section->size], 0,
+         sizeof(struct kv_pair));
+  section->kv_pairs[section->size]->key = trim(equaltok);
+
+  equaltok = strtok_r(NULL, splitter, &temp_equaltok);
+  if (equaltok == NULL) {
+    // this can happen because no value was set
+    // e.g. banned.users=#this is a comment
+    int has_values = 1;
+    if (strstr(line, splitter) == NULL) {
+      fprintf(ERRORFILE, "configuration tokenization failed, error with line %s\n", line);
+      has_values = 0;
     }
-    size_read = getline(&line,&linesize,conf_file);
 
-    //feof returns true only after we read past EOF.
-    //so a file with no new line, at last can reach this place
-    //if size_read returns negative check for eof condition
-    if (size_read == -1) {
-      free(line);
-      if(!feof(conf_file)){
-        exit(INVALID_CONFIG_FILE);
-      } else {
-        break;
-      }
-    }
-    int eol = strlen(line) - 1;
-    if(line[eol] == '\n') {
-        //trim the ending new line
-        line[eol] = '\0';
+    // It is not a valid line, free memory.
+    free((void *) section->kv_pairs[section->size]->key);
+    free((void *) section->kv_pairs[section->size]);
+    section->kv_pairs[section->size] = NULL;
+    free(buffer);
+
+    // Return -1 when no values
+    if (!has_values) {
+      return -1;
     }
-    //comment line
-    if(line[0] == '#') {
-      free(line);
-      continue;
+
+    // Return 2 for comments
+    return 2;
+  }
+
+#ifdef DEBUG
+  fprintf(LOGFILE, "read_config : Adding conf value : %s \n", equaltok);
+#endif
+
+  section->kv_pairs[section->size]->value = trim(equaltok);
+  section->size++;
+  free(buffer);
+  return 0;
+}
+
+/**
+ * Remove any trailing comment from the supplied line. Function modifies the
+ * argument provided.
+ *
+ * @param line the line from which to remove the comment
+ */
+static void trim_comment(char *line) {
+  char *begin_comment = NULL;
+  if (line != NULL) {
+    begin_comment = strchr(line, COMMENT_BEGIN_CHAR);
+    if (begin_comment != NULL) {
+      *begin_comment = '\0';
     }
-    //tokenize first to get key and list of values.
-    //if no equals is found ignore this line, can be an empty line also
-    equaltok = strtok_r(line, "=", &temp_equaltok);
-    if(equaltok == NULL) {
+  }
+}
+
+/**
+ * Allocate a section struct and initialize it. The memory must be freed by
+ * the caller. Function calls exit if any error occurs.
+ *
+ * @return pointer to the allocated section struct
+ *
+ */
+static struct section *allocate_section() {
+  struct section *section = (struct section *) malloc(sizeof(struct section));
+  if (section == NULL) {
+    fprintf(ERRORFILE, "malloc failed while allocating section.\n");
+    exit(OUT_OF_MEMORY);
+  }
+  section->name = NULL;
+  section->kv_pairs = NULL;
+  section->size = 0;
+  return section;
+}
+
+/**
+ * Populate the given section struct with fields from the config file.
+ *
+ * @param conf_file the file to read from
+ * @param section pointer to the section struct to populate
+ *
+ */
+static void populate_section_fields(FILE *conf_file, struct section *section) {
+  char *line;
+  long int offset = 0;
+  while (!feof(conf_file)) {
+    offset = ftell(conf_file);
+    line = read_config_line(conf_file);
+    if (line != NULL) {
+      if (!is_comment_line(line)) {
+        trim_comment(line);
+        if (!is_section_start_line(line)) {
+          if (section->name != NULL) {
+            if (read_section_entry(line, section) < 0) {
+              fprintf(ERRORFILE, "Error parsing line %s", line);
+              exit(INVALID_CONFIG_FILE);
+            }
+          } else {
+            fprintf(ERRORFILE, "Line '%s' doesn't belong to a section\n",
+                    line);
+            exit(INVALID_CONFIG_FILE);
+          }
+        } else {
+          if (section->name == NULL) {
+            section->name = get_section_name(line);
+            if (strlen(section->name) == 0) {
+              fprintf(ERRORFILE, "Empty section name");
+              exit(INVALID_CONFIG_FILE);
+            }
+          } else {
+            // we've reached the next section
+            fseek(conf_file, offset, SEEK_SET);
+            free(line);
+            return;
+          }
+        }
+      }
       free(line);
-      continue;
-    }
-    cfg->confdetails[cfg->size] = (struct confentry *) malloc(
-            sizeof(struct confentry));
-    if(cfg->confdetails[cfg->size] == NULL) {
-      fprintf(LOGFILE,
-          "Failed allocating memory for single configuration item\n");
-      goto cleanup;
     }
+  }
+}
 
-    #ifdef DEBUG
-      fprintf(LOGFILE, "read_config : Adding conf key : %s \n", equaltok);
-    #endif
+/**
+ * Read the section current section from the conf file. Section start is
+ * marked by lines of the form '[section-name]' and continue till the next
+ * section.
+ */
+static struct section *read_section(FILE *conf_file) {
+  struct section *section = allocate_section();
+  populate_section_fields(conf_file, section);
+  if (section->name == NULL) {
+    free_section(section);
+    section = NULL;
+  }
+  return section;
+}
+
+/**
+ * Merge two sections and free the second one after the merge, if desired.
+ * @param section1 the first section
+ * @param section2 the second section
+ * @param free_second_section free the second section if set
+ */
+static void merge_sections(struct section *section1, struct section *section2, const int free_second_section) {
+  int i = 0;
+  section1->kv_pairs = (struct kv_pair **) realloc(
+            section1->kv_pairs,
+            sizeof(struct kv_pair *) * (section1->size + section2->size));
+  if (section1->kv_pairs == NULL) {
+    fprintf(ERRORFILE,
+                "Failed re-allocating memory for configuration items\n");
+    exit(OUT_OF_MEMORY);
+  }
+  for (i = 0; i < section2->size; ++i) {
+    section1->kv_pairs[section1->size + i] = section2->kv_pairs[i];
+  }
+  section1->size += section2->size;
+  if (free_second_section) {
+    free(section2->name);
+    memset(section2, 0, sizeof(*section2));
+    free(section2);
+  }
+}
 
-    memset(cfg->confdetails[cfg->size], 0, sizeof(struct confentry));
-    cfg->confdetails[cfg->size]->key = trim(equaltok);
+int read_config(const char *file_path, struct configuration *cfg) {
+  FILE *conf_file;
 
-    equaltok = strtok_r(NULL, "=", &temp_equaltok);
-    if (equaltok == NULL) {
-      fprintf(LOGFILE, "configuration tokenization failed \n");
-      goto cleanup;
-    }
-    //means value is commented so don't store the key
-    if(equaltok[0] == '#') {
-      free(line);
-      free((void *)cfg->confdetails[cfg->size]->key);
-      free(cfg->confdetails[cfg->size]);
-      continue;
+  if (file_path == NULL) {
+    fprintf(ERRORFILE, "Null configuration filename passed in\n");
+    return INVALID_CONFIG_FILE;
+  }
+
+#ifdef DEBUG
+  fprintf(LOGFILE, "read_config :Conf file name is : %s \n", file_path);
+#endif
+
+  cfg->size = 0;
+  conf_file = fopen(file_path, "r");
+  if (conf_file == NULL) {
+    fprintf(ERRORFILE, "Invalid conf file provided, unable to open file"
+        " : %s \n", file_path);
+    return (INVALID_CONFIG_FILE);
+  }
+
+  cfg->sections = (struct section **) malloc(
+        sizeof(struct section *) * MAX_SIZE);
+  if (!cfg->sections) {
+    fprintf(ERRORFILE,
+            "Failed to allocate memory for configuration sections\n");
+    exit(OUT_OF_MEMORY);
+  }
+
+  // populate any entries in the older format(no sections)
+  cfg->sections[cfg->size] = allocate_section();
+  cfg->sections[cfg->size]->name = strdup("");
+  populate_section_fields(conf_file, cfg->sections[cfg->size]);
+  if (cfg->sections[cfg->size]) {
+    if (cfg->sections[cfg->size]->size) {
+      cfg->size++;
+    } else {
+      free_section(cfg->sections[cfg->size]);
     }
+  }
 
-    #ifdef DEBUG
-      fprintf(LOGFILE, "read_config : Adding conf value : %s \n", equaltok);
-    #endif
-
-    cfg->confdetails[cfg->size]->value = trim(equaltok);
-    if((cfg->size + 1) % MAX_SIZE  == 0) {
-      cfg->confdetails = (struct confentry **) realloc(cfg->confdetails,
-          sizeof(struct confentry **) * (MAX_SIZE + cfg->size));
-      if (cfg->confdetails == NULL) {
-        fprintf(LOGFILE,
-            "Failed re-allocating memory for configuration items\n");
-        goto cleanup;
+  // populate entries in the sections format
+  while (!feof(conf_file)) {
+    cfg->sections[cfg->size] = NULL;
+    struct section *new_section = read_section(conf_file);
+    if (new_section != NULL) {
+      struct section *existing_section =
+          get_configuration_section(new_section->name, cfg);
+      if (existing_section != NULL) {
+        merge_sections((struct section *) existing_section, new_section, 1);
+      } else {
+        cfg->sections[cfg->size] = new_section;
       }
     }
-    if(cfg->confdetails[cfg->size]) {
-        cfg->size++;
-    }
 
-    free(line);
+    // Check if we need to expand memory for sections.
+    if (cfg->sections[cfg->size]) {
+      if ((cfg->size + 1) % MAX_SIZE == 0) {
+        cfg->sections = (struct section **) realloc(cfg->sections,
+                           sizeof(struct sections *) * (MAX_SIZE + cfg->size));
+        if (cfg->sections == NULL) {
+          fprintf(ERRORFILE,
+                  "Failed re-allocating memory for configuration items\n");
+          exit(OUT_OF_MEMORY);
+        }
+      }
+      cfg->size++;
+    }
   }
 
-  //close the file
   fclose(conf_file);
 
   if (cfg->size == 0) {
-    fprintf(ERRORFILE, "Invalid configuration provided in %s\n", file_name);
-    exit(INVALID_CONFIG_FILE);
-  }
-
-  //clean up allocated file name
-  return;
-  //free spaces alloced.
-  cleanup:
-  if (line != NULL) {
-    free(line);
+    free_configuration(cfg);
+    fprintf(ERRORFILE, "Invalid configuration provided in %s\n", file_path);
+    return INVALID_CONFIG_FILE;
   }
-  fclose(conf_file);
-  free_configurations(cfg);
-  return;
+  return 0;
 }
 
 /*
@@ -297,11 +555,14 @@ void read_config(const char* file_name, struct configuration *cfg) {
  * array, next time onwards used the populated array.
  *
  */
-char * get_value(const char* key, struct configuration *cfg) {
+char *get_section_value(const char *key, const struct section *section) {
   int count;
-  for (count = 0; count < cfg->size; count++) {
-    if (strcmp(cfg->confdetails[count]->key, key) == 0) {
-      return strdup(cfg->confdetails[count]->value);
+  if (key == NULL || section == NULL) {
+    return NULL;
+  }
+  for (count = 0; count < section->size; count++) {
+    if (strcmp(section->kv_pairs[count]->key, key) == 0) {
+      return strdup(section->kv_pairs[count]->value);
     }
   }
   return NULL;
@@ -311,61 +572,80 @@ char * get_value(const char* key, struct configuration *cfg) {
  * Function to return an array of values for a key.
  * Value delimiter is assumed to be a ','.
  */
-char ** get_values(const char * key, struct configuration *cfg) {
-  char *value = get_value(key, cfg);
-  return extract_values_delim(value, ",");
+char **get_section_values(const char *key, const struct section *cfg) {
+  return get_section_values_delimiter(key, cfg, ",");
 }
 
 /**
  * Function to return an array of values for a key, using the specified
  delimiter.
  */
-char ** get_values_delim(const char * key, struct configuration *cfg,
-    const char *delim) {
-  char *value = get_value(key, cfg);
-  return extract_values_delim(value, delim);
+char **get_section_values_delimiter(const char *key, const struct section *cfg,
+                                    const char *delim) {
+  if (key == NULL || cfg == NULL || delim == NULL) {
+    return NULL;
+  }
+  char *value = get_section_value(key, cfg);
+  char **split_values = split_delimiter(value, delim);
+
+  if (value) {
+    free(value);
+  }
+
+  return split_values;
 }
 
-char ** extract_values_delim(char *value, const char *delim) {
-  char ** toPass = NULL;
-  char *tempTok = NULL;
-  char *tempstr = NULL;
-  int size = 0;
-  int toPassSize = MAX_SIZE;
-  //first allocate any array of 10
-  if(value != NULL) {
-    toPass = (char **) malloc(sizeof(char *) * toPassSize);
-    tempTok = strtok_r((char *)value, delim, &tempstr);
-    while (tempTok != NULL) {
-      toPass[size++] = tempTok;
-      if(size == toPassSize) {
-        toPassSize += MAX_SIZE;
-        toPass = (char **) realloc(toPass,(sizeof(char *) * toPassSize));
-      }
-      tempTok = strtok_r(NULL, delim, &tempstr);
-    }
+char *get_configuration_value(const char *key, const char *section,
+                              const struct configuration *cfg) {
+  const struct section *section_ptr;
+  if (key == NULL || section == NULL || cfg == NULL) {
+    return NULL;
   }
-  if (toPass != NULL) {
-    toPass[size] = NULL;
+  section_ptr = get_configuration_section(section, cfg);
+  if (section_ptr != NULL) {
+    return get_section_value(key, section_ptr);
   }
-  return toPass;
+  return NULL;
 }
 
-/**
- * Extracts array of values from the '%' separated list of values.
- */
-char ** extract_values(char *value) {
-  return extract_values_delim(value, "%");
+char **get_configuration_values(const char *key, const char *section,
+                                const struct configuration *cfg) {
+  const struct section *section_ptr;
+  if (key == NULL || section == NULL || cfg == NULL) {
+    return NULL;
+  }
+  section_ptr = get_configuration_section(section, cfg);
+  if (section_ptr != NULL) {
+    return get_section_values(key, section_ptr);
+  }
+  return NULL;
+}
+
+char **get_configuration_values_delimiter(const char *key, const char *section,
+                                          const struct configuration *cfg, const char *delim) {
+  const struct section *section_ptr;
+  if (key == NULL || section == NULL || cfg == NULL || delim == NULL) {
+    return NULL;
+  }
+  section_ptr = get_configuration_section(section, cfg);
+  if (section_ptr != NULL) {
+    return get_section_values_delimiter(key, section_ptr, delim);
+  }
+  return NULL;
 }
 
-// free an entry set of values
-void free_values(char** values) {
-  if (*values != NULL) {
-    free(*values);
+struct section *get_configuration_section(const char *section,
+                                          const struct configuration *cfg) {
+  int i = 0;
+  if (cfg == NULL || section == NULL) {
+    return NULL;
   }
-  if (values != NULL) {
-    free(values);
+  for (i = 0; i < cfg->size; ++i) {
+    if (strcmp(cfg->sections[i]->name, section) == 0) {
+      return cfg->sections[i];
+    }
   }
+  return NULL;
 }
 
 /**
@@ -376,12 +656,12 @@ int get_kv_key(const char *input, char *out, size_t out_len) {
   if (input == NULL)
     return -EINVAL;
 
-  char *split = strchr(input, '=');
+  const char *split = strchr(input, '=');
 
   if (split == NULL)
     return -EINVAL;
 
-  int key_len = split - input;
+  unsigned long key_len = split - input;
 
   if (out_len < (key_len + 1) || out == NULL)
     return -ENAMETOOLONG;
@@ -400,13 +680,13 @@ int get_kv_value(const char *input, char *out, size_t out_len) {
   if (input == NULL)
     return -EINVAL;
 
-  char *split = strchr(input, '=');
+  const char *split = strchr(input, '=');
 
   if (split == NULL)
     return -EINVAL;
 
   split++; // advance past '=' to the value
-  int val_len = (input + strlen(input)) - split;
+  unsigned long val_len = (input + strlen(input)) - split;
 
   if (out_len < (val_len + 1) || out == NULL)
     return -ENAMETOOLONG;

http://git-wip-us.apache.org/repos/asf/hadoop/blob/ec694145/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/configuration.h
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/configuration.h b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/configuration.h
index 2d14867..1ea5561 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/configuration.h
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/configuration.h
@@ -16,6 +16,9 @@
  * limitations under the License.
  */
 
+#ifndef __YARN_CONTAINER_EXECUTOR_CONFIG_H__
+#define __YARN_CONTAINER_EXECUTOR_CONFIG_H__
+
 #ifdef __FreeBSD__
 #define _WITH_GETLINE
 #endif
@@ -23,62 +26,160 @@
 #include <stddef.h>
 
 /** Define a platform-independent constant instead of using PATH_MAX */
-
 #define EXECUTOR_PATH_MAX 4096
 
-/**
- * Ensure that the configuration file and all of the containing directories
- * are only writable by root. Otherwise, an attacker can change the
- * configuration and potentially cause damage.
- * returns 0 if permissions are ok
- */
-int check_configuration_permissions(const char* file_name);
-
-/**
- * Return a string with the configuration file path name resolved via realpath(3)
- *
- * NOTE: relative path names are resolved relative to the second argument not getwd(3)
- */
-char *resolve_config_path(const char* file_name, const char *root);
-
-// Config data structures.
-struct confentry {
+// Configuration data structures.
+struct kv_pair {
   const char *key;
   const char *value;
 };
 
+struct section {
+  int size;
+  char *name;
+  struct kv_pair **kv_pairs;
+};
+
 struct configuration {
   int size;
-  struct confentry **confdetails;
+  struct section **sections;
 };
 
-// read the given configuration file into the specified config struct.
-void read_config(const char* config_file, struct configuration *cfg);
+/**
+ * Function to ensure that the configuration file and all of the containing
+ * directories are only writable by root. Otherwise, an attacker can change
+ * the configuration and potentially cause damage.
+ *
+ * @param file_name name of the config file
+ *
+ * @returns 0 if permissions are correct, non-zero on error
+ */
+int check_configuration_permissions(const char *file_name);
+
+/**
+ * Return a string with the configuration file path name resolved via
+ * realpath(3). Relative path names are resolved relative to the second
+ * argument and not getwd(3). It's up to the caller to free the returned
+ * value.
+ *
+ * @param file_name name of the config file
+ * @param root the path against which relative path names are to be resolved
+ *
+ * @returns the resolved configuration file path
+ */
+char* resolve_config_path(const char *file_name, const char *root);
 
-//method exposed to get the configurations
-char *get_value(const char* key, struct configuration *cfg);
+/**
+ * Read the given configuration file into the specified configuration struct.
+ * It's the responsibility of the caller to call free_configurations to free
+ * the allocated memory. The function will check to ensure that the
+ * configuration file has the appropriate owner and permissions.
+ *
+ * @param file_path name of the configuration file to be read
+ * @param cfg the configuration structure to be filled.
+ *
+ * @return 0 on success, non-zero if there was an error
+ */
+int read_config(const char *file_path, struct configuration *cfg);
+
+/**
+ * Get the value for a key in the specified section. It's up to the caller to
+ * free the memory used for storing the return value.
+ *
+ * @param key key the name of the key
+ * @param section the section to be looked up
+ *
+ * @return pointer to the value if the key was found, null otherwise
+ */
+char* get_section_value(const char *key, const struct section *section);
 
-//function to return array of values pointing to the key. Values are
-//comma seperated strings.
-char ** get_values(const char* key, struct configuration *cfg);
+/**
+ * Function to get the values for a given key in the specified section.
+ * The value is split by ",". It's up to the caller to free the memory used
+ * for storing the return values.
+ *
+ * @param key the key to be looked up
+ * @param section the section to be looked up
+ *
+ * @return array of values, null if the key was not found
+ */
+char** get_section_values(const char *key, const struct section *section);
 
 /**
- * Function to return an array of values for a key, using the specified
- delimiter.
+ * Function to get the values for a given key in the specified section.
+ * The value is split by the specified delimiter. It's up to the caller to
+ * free the memory used for storing the return values.
+ *
+ * @param key the key to be looked up
+ * @param section the section to be looked up
+ * @param delimiter the delimiter to be used to split the value
+ *
+ * @return array of values, null if the key was not found
  */
-char ** get_values_delim(const char * key, struct configuration *cfg,
+char** get_section_values_delimiter(const char *key, const struct section *section,
     const char *delim);
 
-// Extracts array of values from the comma separated list of values.
-char ** extract_values(char *value);
+/**
+ * Get the value for a key in the specified section in the specified
+ * configuration. It's up to the caller to free the memory used for storing
+ * the return value.
+ *
+ * @param key key the name of the key
+ * @param section the name section to be looked up
+ * @param cfg the configuration to be used
+ *
+ * @return pointer to the value if the key was found, null otherwise
+ */
+char* get_configuration_value(const char *key, const char* section,
+    const struct configuration *cfg);
+
+/**
+ * Function to get the values for a given key in the specified section in the
+ * specified configuration. The value is split by ",". It's up to the caller to
+ * free the memory used for storing the return values.
+ *
+ * @param key the key to be looked up
+ * @param section the name of the section to be looked up
+ * @param cfg the configuration to be looked up
+ *
+ * @return array of values, null if the key was not found
+ */
+char** get_configuration_values(const char *key, const char* section,
+    const struct configuration *cfg);
 
-char ** extract_values_delim(char *value, const char *delim);
+/**
+ * Function to get the values for a given key in the specified section in the
+ * specified configuration. The value is split by the specified delimiter.
+ * It's up to the caller to free the memory used for storing the return values.
+ *
+ * @param key the key to be looked up
+ * @param section the name of the section to be looked up
+ * @param cfg the section to be looked up
+ * @param delimiter the delimiter to be used to split the value
+ *
+ * @return array of values, null if the key was not found
+ */
+char** get_configuration_values_delimiter(const char *key, const char* section,
+    const struct configuration *cfg, const char *delimiter);
 
-// free the memory returned by get_values
-void free_values(char** values);
+/**
+ * Function to retrieve the specified section from the configuration.
+ *
+ * @param section the name of the section to retrieve
+ * @param cfg the configuration structure to use
+ *
+ * @return pointer to section struct containing details of the section
+ *         null on error
+ */
+struct section* get_configuration_section(const char *section,
+    const struct configuration *cfg);
 
-//method to free allocated configuration
-void free_configurations(struct configuration *cfg);
+/**
+ * Method to free an allocated config struct.
+ *
+ * @param cfg pointer to the structure to free
+ */
+void free_configuration(struct configuration *cfg);
 
 /**
  * If str is a string of the form key=val, find 'key'
@@ -106,11 +207,4 @@ int get_kv_key(const char *input, char *out, size_t out_len);
  */
 int get_kv_value(const char *input, char *out, size_t out_len);
 
-/**
- * Trim whitespace from beginning and end.
- *
- * @param input    Input string that needs to be trimmed
- *
- * @return the trimmed string allocated with malloc. I has to be freed by the caller
-*/
-char* trim(char* input);
+#endif

http://git-wip-us.apache.org/repos/asf/hadoop/blob/ec694145/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/container-executor.c
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/container-executor.c b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/container-executor.c
index def628e..9f754c4 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/container-executor.c
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/container-executor.c
@@ -19,6 +19,8 @@
 #include "configuration.h"
 #include "container-executor.h"
 #include "utils/string-utils.h"
+#include "util.h"
+#include "config.h"
 
 #include <inttypes.h>
 #include <libgen.h>
@@ -43,8 +45,6 @@
 #include <getopt.h>
 #include <regex.h>
 
-#include "config.h"
-
 #ifndef HAVE_FCHMODAT
 #include "compat/fchmodat.h"
 #endif
@@ -92,7 +92,8 @@ FILE* ERRORFILE = NULL;
 static uid_t nm_uid = -1;
 static gid_t nm_gid = -1;
 
-struct configuration executor_cfg = {.size=0, .confdetails=NULL};
+struct configuration CFG = {.size=0, .sections=NULL};
+struct section executor_cfg = {.size=0, .kv_pairs=NULL};
 
 char *concatenate(char *concat_pattern, char *return_path_name,
    int numArgs, ...);
@@ -103,18 +104,25 @@ void set_nm_uid(uid_t user, gid_t group) {
 }
 
 //function used to load the configurations present in the secure config
-void read_executor_config(const char* file_name) {
-    read_config(file_name, &executor_cfg);
+void read_executor_config(const char *file_name) {
+  const struct section *tmp = NULL;
+  int ret = read_config(file_name, &CFG);
+  if (ret == 0) {
+    tmp = get_configuration_section("", &CFG);
+    if (tmp != NULL) {
+      executor_cfg = *tmp;
+    }
+  }
 }
 
 //function used to free executor configuration data
 void free_executor_configurations() {
-    free_configurations(&executor_cfg);
+    free_configuration(&CFG);
 }
 
 //Lookup nodemanager group from container executor configuration.
 char *get_nodemanager_group() {
-    return get_value(NM_GROUP_KEY, &executor_cfg);
+    return get_section_value(NM_GROUP_KEY, &executor_cfg);
 }
 
 int check_executor_permissions(char *executable_file) {
@@ -431,8 +439,8 @@ int change_user(uid_t user, gid_t group) {
 }
 
 int is_feature_enabled(const char* feature_key, int default_value,
-                              struct configuration *cfg) {
-    char *enabled_str = get_value(feature_key, cfg);
+                              struct section *cfg) {
+    char *enabled_str = get_section_value(feature_key, cfg);
     int enabled = default_value;
 
     if (enabled_str != NULL) {
@@ -753,7 +761,7 @@ static struct passwd* get_user_info(const char* user) {
 }
 
 int is_whitelisted(const char *user) {
-  char **whitelist = get_values(ALLOWED_SYSTEM_USERS_KEY, &executor_cfg);
+  char **whitelist = get_section_values(ALLOWED_SYSTEM_USERS_KEY, &executor_cfg);
   char **users = whitelist;
   if (whitelist != NULL) {
     for(; *users; ++users) {
@@ -781,7 +789,7 @@ struct passwd* check_user(const char *user) {
     fflush(LOGFILE);
     return NULL;
   }
-  char *min_uid_str = get_value(MIN_USERID_KEY, &executor_cfg);
+  char *min_uid_str = get_section_value(MIN_USERID_KEY, &executor_cfg);
   int min_uid = DEFAULT_MIN_USERID;
   if (min_uid_str != NULL) {
     char *end_ptr = NULL;
@@ -808,7 +816,7 @@ struct passwd* check_user(const char *user) {
     free(user_info);
     return NULL;
   }
-  char **banned_users = get_values(BANNED_USERS_KEY, &executor_cfg);
+  char **banned_users = get_section_values(BANNED_USERS_KEY, &executor_cfg);
   banned_users = banned_users == NULL ?
     (char**) DEFAULT_BANNED_USERS : banned_users;
   char **banned_user = banned_users;
@@ -1194,7 +1202,6 @@ char** tokenize_docker_command(const char *input, int *split_counter) {
   char *line = (char *)calloc(strlen(input) + 1, sizeof(char));
   char **linesplit = (char **) malloc(sizeof(char *));
   char *p = NULL;
-  int c = 0;
   *split_counter = 0;
   strncpy(line, input, strlen(input));
 
@@ -1408,12 +1415,12 @@ char* parse_docker_command_file(const char* command_file) {
 
 int run_docker(const char *command_file) {
   char* docker_command = parse_docker_command_file(command_file);
-  char* docker_binary = get_value(DOCKER_BINARY_KEY, &executor_cfg);
+  char* docker_binary = get_section_value(DOCKER_BINARY_KEY, &executor_cfg);
   docker_binary = check_docker_binary(docker_binary);
 
   char* docker_command_with_binary = calloc(sizeof(char), EXECUTOR_PATH_MAX);
   snprintf(docker_command_with_binary, EXECUTOR_PATH_MAX, "%s %s", docker_binary, docker_command);
-  char **args = extract_values_delim(docker_command_with_binary, " ");
+  char **args = split_delimiter(docker_command_with_binary, " ");
 
   int exit_code = -1;
   if (execvp(docker_binary, args) != 0) {
@@ -1574,7 +1581,7 @@ int launch_docker_container_as_user(const char * user, const char *app_id,
   uid_t prev_uid = geteuid();
 
   char *docker_command = parse_docker_command_file(command_file);
-  char *docker_binary = get_value(DOCKER_BINARY_KEY, &executor_cfg);
+  char *docker_binary = get_section_value(DOCKER_BINARY_KEY, &executor_cfg);
   docker_binary = check_docker_binary(docker_binary);
 
   fprintf(LOGFILE, "Creating script paths...\n");

http://git-wip-us.apache.org/repos/asf/hadoop/blob/ec694145/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/container-executor.h
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/container-executor.h b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/container-executor.h
index 1dc0491..ea8b5e3 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/container-executor.h
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/container-executor.h
@@ -35,51 +35,6 @@ enum command {
   LIST_AS_USER = 5
 };
 
-enum errorcodes {
-  INVALID_ARGUMENT_NUMBER = 1,
-  //INVALID_USER_NAME 2
-  INVALID_COMMAND_PROVIDED = 3,
-  // SUPER_USER_NOT_ALLOWED_TO_RUN_TASKS (NOT USED) 4
-  INVALID_NM_ROOT_DIRS = 5,
-  SETUID_OPER_FAILED, //6
-  UNABLE_TO_EXECUTE_CONTAINER_SCRIPT, //7
-  UNABLE_TO_SIGNAL_CONTAINER, //8
-  INVALID_CONTAINER_PID, //9
-  // ERROR_RESOLVING_FILE_PATH (NOT_USED) 10
-  // RELATIVE_PATH_COMPONENTS_IN_FILE_PATH (NOT USED) 11
-  // UNABLE_TO_STAT_FILE (NOT USED) 12
-  // FILE_NOT_OWNED_BY_ROOT (NOT USED) 13
-  // PREPARE_CONTAINER_DIRECTORIES_FAILED (NOT USED) 14
-  // INITIALIZE_CONTAINER_FAILED (NOT USED) 15
-  // PREPARE_CONTAINER_LOGS_FAILED (NOT USED) 16
-  // INVALID_LOG_DIR (NOT USED) 17
-  OUT_OF_MEMORY = 18,
-  // INITIALIZE_DISTCACHEFILE_FAILED (NOT USED) 19
-  INITIALIZE_USER_FAILED = 20,
-  PATH_TO_DELETE_IS_NULL, //21
-  INVALID_CONTAINER_EXEC_PERMISSIONS, //22
-  // PREPARE_JOB_LOGS_FAILED (NOT USED) 23
-  INVALID_CONFIG_FILE = 24,
-  SETSID_OPER_FAILED = 25,
-  WRITE_PIDFILE_FAILED = 26,
-  WRITE_CGROUP_FAILED = 27,
-  TRAFFIC_CONTROL_EXECUTION_FAILED = 28,
-  DOCKER_RUN_FAILED = 29,
-  ERROR_OPENING_DOCKER_FILE = 30,
-  ERROR_READING_DOCKER_FILE = 31,
-  FEATURE_DISABLED = 32,
-  COULD_NOT_CREATE_SCRIPT_COPY = 33,
-  COULD_NOT_CREATE_CREDENTIALS_FILE = 34,
-  COULD_NOT_CREATE_WORK_DIRECTORIES = 35,
-  COULD_NOT_CREATE_APP_LOG_DIRECTORIES = 36,
-  COULD_NOT_CREATE_TMP_DIRECTORIES = 37,
-  ERROR_CREATE_CONTAINER_DIRECTORIES_ARGUMENTS = 38,
-  ERROR_SANITIZING_DOCKER_COMMAND = 39,
-  DOCKER_IMAGE_INVALID = 40,
-  DOCKER_CONTAINER_NAME_INVALID = 41,
-  ERROR_COMPILING_REGEX = 42
-};
-
 enum operations {
   CHECK_SETUP = 1,
   MOUNT_CGROUPS = 2,
@@ -111,11 +66,6 @@ enum operations {
 
 extern struct passwd *user_detail;
 
-// the log file for messages
-extern FILE *LOGFILE;
-// the log file for error messages
-extern FILE *ERRORFILE;
-
 // get the executable's filename
 char* get_executable(char *argv0);
 
@@ -276,7 +226,7 @@ int create_validate_dir(const char* npath, mode_t perm, const char* path,
 
 /** Check if a feature is enabled in the specified configuration. */
 int is_feature_enabled(const char* feature_key, int default_value,
-                              struct configuration *cfg);
+                              struct section *cfg);
 
 /** Check if tc (traffic control) support is enabled in configuration. */
 int is_tc_support_enabled();

http://git-wip-us.apache.org/repos/asf/hadoop/blob/ec694145/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/get_executable.c
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/get_executable.c b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/get_executable.c
index ce46b77..55973a2 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/get_executable.c
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/get_executable.c
@@ -31,6 +31,7 @@
 #include "config.h"
 #include "configuration.h"
 #include "container-executor.h"
+#include "util.h"
 
 #include <errno.h>
 #include <stdio.h>

http://git-wip-us.apache.org/repos/asf/hadoop/blob/ec694145/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/main.c
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/main.c b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/main.c
index fdc0496..b2187c9 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/main.c
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/main.c
@@ -19,6 +19,7 @@
 #include "config.h"
 #include "configuration.h"
 #include "container-executor.h"
+#include "util.h"
 
 #include <errno.h>
 #include <grp.h>
@@ -420,7 +421,7 @@ static int validate_run_as_user_commands(int argc, char **argv, int *operation)
 
       cmd_input.resources_key = resources_key;
       cmd_input.resources_value = resources_value;
-      cmd_input.resources_values = extract_values(resources_value);
+      cmd_input.resources_values = split(resources_value);
       *operation = RUN_AS_USER_LAUNCH_DOCKER_CONTAINER;
       return 0;
    } else {
@@ -471,7 +472,7 @@ static int validate_run_as_user_commands(int argc, char **argv, int *operation)
 
     cmd_input.resources_key = resources_key;
     cmd_input.resources_value = resources_value;
-    cmd_input.resources_values = extract_values(resources_value);
+    cmd_input.resources_values = split(resources_value);
     *operation = RUN_AS_USER_LAUNCH_CONTAINER;
     return 0;
 
@@ -565,8 +566,8 @@ int main(int argc, char **argv) {
     exit_code = initialize_app(cmd_input.yarn_user_name,
                             cmd_input.app_id,
                             cmd_input.cred_file,
-                            extract_values(cmd_input.local_dirs),
-                            extract_values(cmd_input.log_dirs),
+                            split(cmd_input.local_dirs),
+                            split(cmd_input.log_dirs),
                             argv + optind);
     break;
   case RUN_AS_USER_LAUNCH_DOCKER_CONTAINER:
@@ -591,8 +592,8 @@ int main(int argc, char **argv) {
                       cmd_input.script_file,
                       cmd_input.cred_file,
                       cmd_input.pid_file,
-                      extract_values(cmd_input.local_dirs),
-                      extract_values(cmd_input.log_dirs),
+                      split(cmd_input.local_dirs),
+                      split(cmd_input.log_dirs),
                       cmd_input.docker_command_file,
                       cmd_input.resources_key,
                       cmd_input.resources_values);
@@ -619,8 +620,8 @@ int main(int argc, char **argv) {
                     cmd_input.script_file,
                     cmd_input.cred_file,
                     cmd_input.pid_file,
-                    extract_values(cmd_input.local_dirs),
-                    extract_values(cmd_input.log_dirs),
+                    split(cmd_input.local_dirs),
+                    split(cmd_input.log_dirs),
                     cmd_input.resources_key,
                     cmd_input.resources_values);
     free(cmd_input.resources_key);

http://git-wip-us.apache.org/repos/asf/hadoop/blob/ec694145/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/util.c
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/util.c b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/util.c
new file mode 100644
index 0000000..8e39ca8
--- /dev/null
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/util.c
@@ -0,0 +1,134 @@
+/**
+ * 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.
+ */
+
+#include "util.h"
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+
+char** split_delimiter(char *value, const char *delim) {
+  char **return_values = NULL;
+  char *temp_tok = NULL;
+  char *tempstr = NULL;
+  int size = 0;
+  int per_alloc_size = 10;
+  int return_values_size = per_alloc_size;
+  int failed = 0;
+
+  //first allocate any array of 10
+  if(value != NULL) {
+    return_values = (char **) malloc(sizeof(char *) * return_values_size);
+    if (!return_values) {
+      fprintf(ERRORFILE, "Allocation error for return_values in %s.\n",
+              __func__);
+      failed = 1;
+      goto cleanup;
+    }
+    memset(return_values, 0, sizeof(char *) * return_values_size);
+
+    temp_tok = strtok_r(value, delim, &tempstr);
+    while (temp_tok != NULL) {
+      temp_tok = strdup(temp_tok);
+      if (NULL == temp_tok) {
+        fprintf(ERRORFILE, "Allocation error in %s.\n", __func__);
+        failed = 1;
+        goto cleanup;
+      }
+
+      return_values[size++] = temp_tok;
+
+      // Make sure returned values has enough space for the trailing NULL.
+      if (size >= return_values_size - 1) {
+        return_values_size += per_alloc_size;
+        return_values = (char **) realloc(return_values,(sizeof(char *) *
+          return_values_size));
+
+        // Make sure new added memory are filled with NULL
+        for (int i = size; i < return_values_size; i++) {
+          return_values[i] = NULL;
+        }
+      }
+      temp_tok = strtok_r(NULL, delim, &tempstr);
+    }
+  }
+
+  // Put trailing NULL to indicate values terminates.
+  if (return_values != NULL) {
+    return_values[size] = NULL;
+  }
+
+cleanup:
+  if (failed) {
+    free_values(return_values);
+    return NULL;
+  }
+
+  return return_values;
+}
+
+/**
+ * Extracts array of values from the '%' separated list of values.
+ */
+char** split(char *value) {
+  return split_delimiter(value, "%");
+}
+
+// free an entry set of values
+void free_values(char** values) {
+  if (values != NULL) {
+    int idx = 0;
+    while (values[idx]) {
+      free(values[idx]);
+      idx++;
+    }
+    free(values);
+  }
+}
+
+/**
+ * Trim whitespace from beginning and end.
+*/
+char* trim(const char* input) {
+    const char *val_begin;
+    const char *val_end;
+    char *ret;
+
+    if (input == NULL) {
+      return NULL;
+    }
+
+    val_begin = input;
+    val_end = input + strlen(input);
+
+    while (val_begin < val_end && isspace(*val_begin))
+      val_begin++;
+    while (val_end > val_begin && isspace(*(val_end - 1)))
+      val_end--;
+
+    ret = (char *) malloc(
+            sizeof(char) * (val_end - val_begin + 1));
+    if (ret == NULL) {
+      fprintf(ERRORFILE, "Allocation error\n");
+      exit(OUT_OF_MEMORY);
+    }
+
+    strncpy(ret, val_begin, val_end - val_begin);
+    ret[val_end - val_begin] = '\0';
+    return ret;
+}

http://git-wip-us.apache.org/repos/asf/hadoop/blob/ec694145/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/util.h
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/util.h b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/util.h
new file mode 100644
index 0000000..a8a12a9
--- /dev/null
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/util.h
@@ -0,0 +1,115 @@
+/**
+ * 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.
+ */
+
+#ifndef __YARN_POSIX_CONTAINER_EXECUTOR_UTIL_H__
+#define __YARN_POSIX_CONTAINER_EXECUTOR_UTIL_H__
+
+#include <stdio.h>
+
+enum errorcodes {
+  INVALID_ARGUMENT_NUMBER = 1,
+  //INVALID_USER_NAME 2
+  INVALID_COMMAND_PROVIDED = 3,
+  // SUPER_USER_NOT_ALLOWED_TO_RUN_TASKS (NOT USED) 4
+  INVALID_NM_ROOT_DIRS = 5,
+  SETUID_OPER_FAILED, //6
+  UNABLE_TO_EXECUTE_CONTAINER_SCRIPT, //7
+  UNABLE_TO_SIGNAL_CONTAINER, //8
+  INVALID_CONTAINER_PID, //9
+  // ERROR_RESOLVING_FILE_PATH (NOT_USED) 10
+  // RELATIVE_PATH_COMPONENTS_IN_FILE_PATH (NOT USED) 11
+  // UNABLE_TO_STAT_FILE (NOT USED) 12
+  // FILE_NOT_OWNED_BY_ROOT (NOT USED) 13
+  // PREPARE_CONTAINER_DIRECTORIES_FAILED (NOT USED) 14
+  // INITIALIZE_CONTAINER_FAILED (NOT USED) 15
+  // PREPARE_CONTAINER_LOGS_FAILED (NOT USED) 16
+  // INVALID_LOG_DIR (NOT USED) 17
+  OUT_OF_MEMORY = 18,
+  // INITIALIZE_DISTCACHEFILE_FAILED (NOT USED) 19
+  INITIALIZE_USER_FAILED = 20,
+  PATH_TO_DELETE_IS_NULL, //21
+  INVALID_CONTAINER_EXEC_PERMISSIONS, //22
+  // PREPARE_JOB_LOGS_FAILED (NOT USED) 23
+  INVALID_CONFIG_FILE = 24,
+  SETSID_OPER_FAILED = 25,
+  WRITE_PIDFILE_FAILED = 26,
+  WRITE_CGROUP_FAILED = 27,
+  TRAFFIC_CONTROL_EXECUTION_FAILED = 28,
+  DOCKER_RUN_FAILED = 29,
+  ERROR_OPENING_DOCKER_FILE = 30,
+  ERROR_READING_DOCKER_FILE = 31,
+  FEATURE_DISABLED = 32,
+  COULD_NOT_CREATE_SCRIPT_COPY = 33,
+  COULD_NOT_CREATE_CREDENTIALS_FILE = 34,
+  COULD_NOT_CREATE_WORK_DIRECTORIES = 35,
+  COULD_NOT_CREATE_APP_LOG_DIRECTORIES = 36,
+  COULD_NOT_CREATE_TMP_DIRECTORIES = 37,
+  ERROR_CREATE_CONTAINER_DIRECTORIES_ARGUMENTS = 38,
+  ERROR_SANITIZING_DOCKER_COMMAND = 39,
+  DOCKER_IMAGE_INVALID = 40,
+  DOCKER_CONTAINER_NAME_INVALID = 41,
+  ERROR_COMPILING_REGEX = 42
+};
+
+
+// the log file for messages
+extern FILE *LOGFILE;
+// the log file for error messages
+extern FILE *ERRORFILE;
+/**
+ * Function to split the given string using '%' as the separator. It's
+ * up to the caller to free the memory for the returned array. Use the
+ * free_values function to free the allocated memory.
+ *
+ * @param str the string to split
+ *
+ * @return an array of strings
+ */
+char** split(char *str);
+
+/**
+ * Function to split the given string using the delimiter specified. It's
+ * up to the caller to free the memory for the returned array. Use the
+ * free_values function to free the allocated memory.
+ *
+ * @param str the string to split
+ * @param delimiter the delimiter to use
+ *
+ * @return an array of strings
+ */
+char** split_delimiter(char *value, const char *delimiter);
+
+/**
+ * Function to free an array of strings.
+ *
+ * @param values the array to free
+ *
+ */
+void free_values(char **values);
+
+/**
+ * Trim whitespace from beginning and end. The returned string has to be freed
+ * by the caller.
+ *
+ * @param input    Input string that needs to be trimmed
+ *
+ * @return the trimmed string allocated with malloc
+*/
+char* trim(const char *input);
+
+#endif

http://git-wip-us.apache.org/repos/asf/hadoop/blob/ec694145/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/resources/test/test-configurations/configuration-1.cfg
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/resources/test/test-configurations/configuration-1.cfg b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/resources/test/test-configurations/configuration-1.cfg
new file mode 100644
index 0000000..4d0b90d
--- /dev/null
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/resources/test/test-configurations/configuration-1.cfg
@@ -0,0 +1,31 @@
+# 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.
+[section-1]
+key1=value1
+split-key=val1,val2,val3
+perc-key=perc-val1%perc-val2
+# some comment
+
+[split-section]
+key3=value3
+
+[section-2]
+key1=value2
+
+key2=value2
+
+[split-section]
+key4=value4

http://git-wip-us.apache.org/repos/asf/hadoop/blob/ec694145/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/resources/test/test-configurations/configuration-2.cfg
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/resources/test/test-configurations/configuration-2.cfg b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/resources/test/test-configurations/configuration-2.cfg
new file mode 100644
index 0000000..aa02db8
--- /dev/null
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/resources/test/test-configurations/configuration-2.cfg
@@ -0,0 +1,28 @@
+# 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.
+
+# Test mixed mode config file
+# Initial few lines are in the key=value format
+# and then the sections start
+
+key1=value1
+key2=value2
+
+
+[section-1]
+key3=value3
+key1=value4
+

http://git-wip-us.apache.org/repos/asf/hadoop/blob/ec694145/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/resources/test/test-configurations/old-config.cfg
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/resources/test/test-configurations/old-config.cfg b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/resources/test/test-configurations/old-config.cfg
new file mode 100644
index 0000000..947a3fa
--- /dev/null
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/resources/test/test-configurations/old-config.cfg
@@ -0,0 +1,25 @@
+# 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.
+yarn.nodemanager.linux-container-executor.group=yarn
+banned.users=root,testuser1,testuser2#comma separated list of users who can not run applications
+min.user.id=1000
+allowed.system.users=nobody,daemon
+feature.docker.enabled=1
+feature.tc.enabled=0
+docker.binary=/usr/bin/docker
+yarn.local.dirs=/var/run/yarn%/tmp/mydir
+test.key=#no value for this key
+# test.key2=0

http://git-wip-us.apache.org/repos/asf/hadoop/blob/ec694145/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/test/test-container-executor.c
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/test/test-container-executor.c b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/test/test-container-executor.c
index 3202652..3cfefa0 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/test/test-container-executor.c
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/test/test-container-executor.c
@@ -18,6 +18,7 @@
 #include "configuration.h"
 #include "container-executor.h"
 #include "utils/string-utils.h"
+#include "util.h"
 
 #include <inttypes.h>
 #include <errno.h>
@@ -404,7 +405,7 @@ void test_delete_app() {
 }
 
 void validate_feature_enabled_value(int expected_value, const char* key,
-    int default_value, struct configuration *cfg) {
+    int default_value, struct section *cfg) {
   int value = is_feature_enabled(key, default_value, cfg);
 
   if (value != expected_value) {
@@ -419,7 +420,8 @@ void test_is_feature_enabled() {
   FILE *file = fopen(filename, "w");
   int disabled = 0;
   int enabled = 1;
-  struct configuration cfg = {.size=0, .confdetails=NULL};
+  struct configuration exec_cfg = {.size=0, .sections=NULL};
+  struct section cfg = {.size=0, .kv_pairs=NULL};
 
   if (file == NULL) {
     printf("FAIL: Could not open configuration file: %s\n", filename);
@@ -433,7 +435,8 @@ void test_is_feature_enabled() {
   fprintf(file, "feature.name5.enabled=-1\n");
   fprintf(file, "feature.name6.enabled=2\n");
   fclose(file);
-  read_config(filename, &cfg);
+  read_config(filename, &exec_cfg);
+  cfg = *(get_configuration_section("", &exec_cfg));
 
   validate_feature_enabled_value(disabled, "feature.name1.enabled",
       disabled, &cfg);
@@ -449,7 +452,7 @@ void test_is_feature_enabled() {
           disabled, &cfg);
 
 
-  free_configurations(&cfg);
+  free_configuration(&exec_cfg);
 }
 
 void test_delete_user() {
@@ -1345,8 +1348,8 @@ int main(int argc, char **argv) {
 
   read_executor_config(TEST_ROOT "/test.cfg");
 
-  local_dirs = extract_values(strdup(NM_LOCAL_DIRS));
-  log_dirs = extract_values(strdup(NM_LOG_DIRS));
+  local_dirs = split(strdup(NM_LOCAL_DIRS));
+  log_dirs = split(strdup(NM_LOG_DIRS));
 
   create_nm_roots(local_dirs);
 


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