/*
* Function used to launch a task as the provided user. It does the following :
* 1) Creates attempt work dir and log dir to be accessible by the child
* 2) Copies the script file from the TT to the work directory
* 3) Sets up the environment
* 4) Does an execlp on the same in order to replace the current image with
* task image.
*/
int run_task_as_user(const char *user, const char * good_local_dirs,
const char *job_id, const char *task_id,
const char *work_dir, const char *script_name) {
int exit_code = -1;
char *task_script_path = NULL;
if (create_attempt_directories(user, good_local_dirs, job_id, task_id) != 0) {
goto cleanup;
}
int task_file_source = open_file_as_task_tracker(script_name);
if (task_file_source == -1) {
goto cleanup;
}
task_script_path = get_task_launcher_file(work_dir);
if (task_script_path == NULL) {
exit_code = OUT_OF_MEMORY;
goto cleanup;
}
if (copy_file(task_file_source, script_name,task_script_path,S_IRWXU) != 0) {
goto cleanup;
}
//change the user
// dlai blocked 12/29/2012 fcloseall();
// dlai added ditto
fflush(stdin);
fflush(stdout);
fflush(stderr);
fclose(stdin);
fclose(stdout);
fclose(stderr);
umask(0027);
if (chdir(work_dir) != 0) {
fprintf(LOGFILE, "Can't change directory to %s -%s\n", work_dir,
strerror(errno));
goto cleanup;
}
if (change_user(user_detail->pw_uid, user_detail->pw_gid) != 0) {
exit_code = SETUID_OPER_FAILED;
goto cleanup;
}
// dlai blocked `1/19/10`1 if (execlp(task_script_path, task_script_path, NULL) != 0) {
if (execlp(task_script_path, task_script_path, (char*) 0) != 0) {
fprintf(LOGFILE, "Couldn't execute the task jvm file %s - %s",
task_script_path, strerror(errno));
exit_code = UNABLE_TO_EXECUTE_TASK_SCRIPT;
goto cleanup;
}
exit_code = 0;
cleanup:
free(task_script_path);
return exit_code;
}
void test_get_task_launcher_file() {
char *expected_file = ("/tmp/usercache/user/appcache/job_200906101234_0001"
"/task.sh");
char *job_dir = get_job_directory("/tmp", "user",
"job_200906101234_0001");
char *task_file = get_task_launcher_file(job_dir);
if (strcmp(task_file, expected_file) != 0) {
printf("failure to match expected task file %s vs %s\n", task_file,
expected_file);
exit(1);
}
free(job_dir);
free(task_file);
}