int main(int argc, char **argv) {
//LOGFILE = stdout;
LOGFILE = fopen("/tmp/taskcontroller.log", "a+");
int i=0;
for (i=0; i<argc; i++)
fprintf(LOGFILE, "Arg[%i] = %s\n", i, argv[i]);
//Minimum number of arguments required to run the task-controller
if (argc < 4) {
display_usage(LOGFILE);
return INVALID_ARGUMENT_NUMBER;
}
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;
const char * job_xml = 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 task-controller 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 < 7) {
fprintf(LOGFILE, "Too few arguments (%d vs 7) for initialize job\n",
argc);
return INVALID_ARGUMENT_NUMBER;
}
job_id = argv[optind++];
cred_file = argv[optind++];
job_xml = argv[optind++];
exit_code = initialize_job(user_detail->pw_name, job_id, cred_file,
job_xml, argv + optind);
break;
case LAUNCH_TASK_JVM:
if (argc < 7) {
fprintf(LOGFILE, "Too few arguments (%d vs 7) 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++];
exit_code = run_task_as_user(user_detail->pw_name, job_id, task_id,
current_dir, script_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);
break;
case DELETE_LOG_AS_USER:
dir_to_be_deleted = argv[optind++];
exit_code= delete_log_directory(dir_to_be_deleted);
break;
case RUN_COMMAND_AS_USER:
exit_code = run_command_as_user(user_detail->pw_name, argv + optind);
break;
default:
exit_code = INVALID_COMMAND_PROVIDED;
}
fclose(LOGFILE);
return exit_code;
}
void test_run_task() {
printf("\nTesting run task\n");
if (seteuid(0) != 0) {
printf("FAIL: seteuid to root failed - %s\n", strerror(errno));
exit(1);
}
FILE* creds = fopen(TEST_ROOT "/creds.txt", "w");
if (creds == NULL) {
printf("FAIL: failed to create credentials file - %s\n", strerror(errno));
exit(1);
}
if (fprintf(creds, "secret key\n") < 0) {
printf("FAIL: fprintf failed - %s\n", strerror(errno));
exit(1);
}
if (fclose(creds) != 0) {
printf("FAIL: fclose failed - %s\n", strerror(errno));
exit(1);
}
const char* script_name = TEST_ROOT "/task-script";
FILE* script = fopen(script_name, "w");
if (script == NULL) {
printf("FAIL: failed to create script file - %s\n", strerror(errno));
exit(1);
}
if (seteuid(user_detail->pw_uid) != 0) {
printf("FAIL: failed to seteuid back to user - %s\n", strerror(errno));
exit(1);
}
if (fprintf(script, "#!/bin/bash\n"
"touch foobar\n"
"exit 0") < 0) {
printf("FAIL: fprintf failed - %s\n", strerror(errno));
exit(1);
}
if (fclose(script) != 0) {
printf("FAIL: fclose failed - %s\n", strerror(errno));
exit(1);
}
fflush(stdout);
fflush(stderr);
char* task_dir = get_attempt_work_directory(TEST_ROOT "/local-1",
username, "job_4", "task_1");
pid_t child = fork();
if (child == -1) {
printf("FAIL: failed to fork process for init_job - %s\n",
strerror(errno));
exit(1);
} else if (child == 0) {
if (run_task_as_user(username, "job_4", "task_1",
task_dir, script_name, TEST_ROOT "creds.txt") != 0) {
printf("FAIL: failed in child\n");
exit(42);
}
// should never return
exit(1);
}
int status = 0;
if (waitpid(child, &status, 0) <= 0) {
printf("FAIL: failed waiting for process %d - %s\n", child,
strerror(errno));
exit(1);
}
if (access(TEST_ROOT "/logs/userlogs/job_4/task_1", R_OK) != 0) {
printf("FAIL: failed to create task log directory\n");
exit(1);
}
if (access(task_dir, R_OK) != 0) {
printf("FAIL: failed to create task directory %s\n", task_dir);
exit(1);
}
char buffer[100000];
sprintf(buffer, "%s/foobar", task_dir);
if (access(buffer, R_OK) != 0) {
printf("FAIL: failed to create touch file %s\n", buffer);
exit(1);
}
free(task_dir);
task_dir = get_job_log_directory("logs", "job_4/task_1");
if (access(task_dir, R_OK) != 0) {
printf("FAIL: failed to create job log directory %s\n", task_dir);
exit(1);
}
free(task_dir);
}
