| /** |
| * 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 "configuration.h" |
| #include "container-executor.h" |
| |
| #include <errno.h> |
| #include <grp.h> |
| #include <limits.h> |
| #include <unistd.h> |
| #include <signal.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/stat.h> |
| |
| #define _STRINGIFY(X) #X |
| #define STRINGIFY(X) _STRINGIFY(X) |
| #define CONF_FILENAME "taskcontroller.cfg" |
| |
| void display_usage(FILE *stream) { |
| fprintf(stream, |
| "Usage: container-executor user command command-args\n"); |
| fprintf(stream, "Commands:\n"); |
| fprintf(stream, " initialize job: %2d jobid tokens cmd args\n", |
| INITIALIZE_JOB); |
| fprintf(stream, " launch task: %2d jobid taskid workdir task-script jobTokens\n", |
| LAUNCH_TASK_JVM); |
| fprintf(stream, " signal task: %2d task-pid signal\n", |
| SIGNAL_TASK); |
| fprintf(stream, " delete as user: %2d relative-path\n", |
| DELETE_AS_USER); |
| } |
| |
| int main(int argc, char **argv) { |
| //Minimum number of arguments required to run the container-executor |
| if (argc < 4) { |
| display_usage(stdout); |
| return INVALID_ARGUMENT_NUMBER; |
| } |
| |
| LOGFILE = stdout; |
| int command; |
| const char * job_id = NULL; |
| const char * task_id = NULL; |
| const char * cred_file = NULL; |
| const char * script_file = NULL; |
| const char * current_dir = NULL; |
| |
| int exit_code = 0; |
| |
| char * dir_to_be_deleted = NULL; |
| |
| char *executable_file = get_executable(); |
| |
| #ifndef HADOOP_CONF_DIR |
| #error HADOOP_CONF_DIR must be defined |
| #endif |
| |
| char *orig_conf_file = STRINGIFY(HADOOP_CONF_DIR) "/" CONF_FILENAME; |
| char *conf_file = realpath(orig_conf_file, NULL); |
| |
| if (conf_file == NULL) { |
| fprintf(LOGFILE, "Configuration file %s not found.\n", orig_conf_file); |
| return INVALID_CONFIG_FILE; |
| } |
| if (check_configuration_permissions(conf_file) != 0) { |
| return INVALID_CONFIG_FILE; |
| } |
| read_config(conf_file); |
| free(conf_file); |
| |
| // look up the task tracker group in the config file |
| char *tt_group = get_value(TT_GROUP_KEY); |
| if (tt_group == NULL) { |
| fprintf(LOGFILE, "Can't get configured value for %s.\n", TT_GROUP_KEY); |
| exit(INVALID_CONFIG_FILE); |
| } |
| struct group *group_info = getgrnam(tt_group); |
| if (group_info == NULL) { |
| fprintf(LOGFILE, "Can't get group information for %s - %s.\n", tt_group, |
| strerror(errno)); |
| exit(INVALID_CONFIG_FILE); |
| } |
| set_tasktracker_uid(getuid(), group_info->gr_gid); |
| // if we are running from a setuid executable, make the real uid root |
| setuid(0); |
| // set the real and effective group id to the task tracker group |
| setgid(group_info->gr_gid); |
| |
| if (check_taskcontroller_permissions(executable_file) != 0) { |
| fprintf(LOGFILE, "Invalid permissions on container-executor binary.\n"); |
| return INVALID_TASKCONTROLLER_PERMISSIONS; |
| } |
| |
| //checks done for user name |
| if (argv[optind] == NULL) { |
| fprintf(LOGFILE, "Invalid user name \n"); |
| return INVALID_USER_NAME; |
| } |
| int ret = set_user(argv[optind]); |
| if (ret != 0) { |
| return ret; |
| } |
| |
| optind = optind + 1; |
| command = atoi(argv[optind++]); |
| |
| fprintf(LOGFILE, "main : command provided %d\n",command); |
| fprintf(LOGFILE, "main : user is %s\n", user_detail->pw_name); |
| |
| switch (command) { |
| case INITIALIZE_JOB: |
| if (argc < 6) { |
| fprintf(LOGFILE, "Too few arguments (%d vs 6) for initialize job\n", |
| argc); |
| return INVALID_ARGUMENT_NUMBER; |
| } |
| job_id = argv[optind++]; |
| cred_file = argv[optind++]; |
| exit_code = initialize_job(user_detail->pw_name, job_id, cred_file, |
| argv + optind); |
| break; |
| case LAUNCH_TASK_JVM: |
| if (argc < 8) { |
| fprintf(LOGFILE, "Too few arguments (%d vs 8) for launch task\n", |
| argc); |
| return INVALID_ARGUMENT_NUMBER; |
| } |
| job_id = argv[optind++]; |
| task_id = argv[optind++]; |
| current_dir = argv[optind++]; |
| script_file = argv[optind++]; |
| cred_file = argv[optind++]; |
| exit_code = run_task_as_user(user_detail->pw_name, job_id, task_id, |
| current_dir, script_file, cred_file); |
| break; |
| case SIGNAL_TASK: |
| if (argc < 5) { |
| fprintf(LOGFILE, "Too few arguments (%d vs 5) for signal task\n", |
| argc); |
| return INVALID_ARGUMENT_NUMBER; |
| } else { |
| char* end_ptr = NULL; |
| char* option = argv[optind++]; |
| int task_pid = strtol(option, &end_ptr, 10); |
| if (option == end_ptr || *end_ptr != '\0') { |
| fprintf(LOGFILE, "Illegal argument for task pid %s\n", option); |
| return INVALID_ARGUMENT_NUMBER; |
| } |
| option = argv[optind++]; |
| int signal = strtol(option, &end_ptr, 10); |
| if (option == end_ptr || *end_ptr != '\0') { |
| fprintf(LOGFILE, "Illegal argument for signal %s\n", option); |
| return INVALID_ARGUMENT_NUMBER; |
| } |
| exit_code = signal_user_task(user_detail->pw_name, task_pid, signal); |
| } |
| break; |
| case DELETE_AS_USER: |
| dir_to_be_deleted = argv[optind++]; |
| exit_code= delete_as_user(user_detail->pw_name, dir_to_be_deleted, |
| argv + optind); |
| break; |
| default: |
| exit_code = INVALID_COMMAND_PROVIDED; |
| } |
| fclose(LOGFILE); |
| return exit_code; |
| } |