コード例 #1
0
ファイル: auvirt.c プロジェクト: yubo/audit
/* Parse and check command line arguments */
int parse_args(int argc, char **argv)
{
	/* Based on http://www.ietf.org/rfc/rfc4122.txt */
	const char *uuid_pattern = "^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-"
		"[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$";
	int i, rc = 0;
	regex_t uuid_regex;

	if (regcomp(&uuid_regex, uuid_pattern, REG_EXTENDED)) {
		fprintf(stderr, "Failed to initialize program.\n");
		return 1;
	}

	for (i = 1; i < argc; i++) {
		const char *opt = argv[i];
		if (opt[0] != '-') {
			fprintf(stderr, "Argument not expected: %s\n", opt);
			goto error;
		} else if (strcmp("--vm", opt) == 0 ||
			   strcmp("-v", opt) == 0) {
			if ((i + 1) >= argc || argv[i + 1][0] == '-') {
				fprintf(stderr, "\"%s\" option requires "
						"an argument.\n", opt);
				goto error;
			}
			vm = argv[++i];
		} else if (strcmp("--uuid", opt) == 0 ||
			   strcmp("-u", opt) == 0) {
			if ((i + 1) >= argc || argv[i + 1][0] == '-') {
				fprintf(stderr, "\"%s\" option requires "
						"an argument.\n", opt);
				goto error;
			}
			if (regexec(&uuid_regex, argv[i + 1], 0, NULL, 0)) {
				fprintf(stderr, "Invalid uuid: %s\n",
						argv[i + 1]);
				goto error;
			}
			uuid = argv[++i];
		} else if (strcmp("--all-events", opt) == 0 ||
		           strcmp("-a", opt) == 0) {
			all_events_flag = 1;
		} else if (strcmp("--summary", opt) == 0 ||
			   strcmp("-s", opt) == 0) {
			summary_flag = 1;
		} else if (strcmp("--file", opt) == 0 ||
			   strcmp("-f", opt) == 0) {
			if ((i + 1) >= argc || argv[i + 1][0] == '-') {
				fprintf(stderr, "\"%s\" option requires "
						"an argument.\n", opt);
				goto error;
			}
			file = argv[++i];
		} else if (strcmp("--show-uuid", opt) == 0) {
			uuid_flag = 1;
		} else if (strcmp("--stdin", opt) == 0) {
			stdin_flag = 1;
		} else if (strcmp("--proof", opt) == 0) {
			proof_flag = 1;
		} else if (strcmp("--help", opt) == 0 ||
			   strcmp("-h", opt) == 0) {
			help_flag = 1;
			goto exit;
		} else if (strcmp("--start", opt) == 0 ||
			   strcmp("-ts", opt) == 0) {
			const char *date, *time = NULL;
			if ((i + 1) >= argc || argv[i + 1][0] == '-') {
				fprintf(stderr, "\"%s\" option requires at "
						"least one argument.\n", opt);
				goto error;
			}
			date = argv[++i];
			if ((i + 1) < argc && argv[i + 1][0] != '-')
				time = argv[++i];
			/* This will set start_time */
			if(ausearch_time_start(date, time))
				goto error;
		} else if (strcmp("--end", opt) == 0 ||
			   strcmp("-te", opt) == 0) {
			const char *date, *time = NULL;
			if ((i + 1) >= argc || argv[i + 1][0] == '-') {
				fprintf(stderr, "\"%s\" option requires at "
						"least one argument.\n", opt);
				goto error;
			}
			date = argv[++i];
			if ((i + 1) < argc && argv[i + 1][0] != '-')
				time = argv[++i];
			/* This will set end_time */
			if (ausearch_time_end(date, time))
				goto error;
		} else if (strcmp("--debug", opt) == 0) {
			debug = 1;
		} else {
			fprintf(stderr, "Unknown option \"%s\".\n", opt);
			goto error;
		}
	}

	/* Validate conflicting options */
	if (stdin_flag && file) {
		fprintf(stderr, "\"--sdtin\" and \"--file\" options "
				"must not be specified together.\n");
		goto error;
	}

	if (debug) {
		fprintf(stderr, "help_flag='%i'\n", help_flag);
		fprintf(stderr, "stdin_flag='%i'\n", stdin_flag);
		fprintf(stderr, "all_events_flag='%i'\n", all_events_flag);
		fprintf(stderr, "summary_flag='%i'\n", summary_flag);
		fprintf(stderr, "uuid='%s'\n", uuid ? uuid : "(null)");
		fprintf(stderr, "vm='%s'\n", vm ? vm : "(null)");
		fprintf(stderr, "file='%s'\n", file ? file : "(null)");
		fprintf(stderr, "start_time='%-.16s'\n", (start_time == 0L) ?
				"" : ctime(&start_time));
		fprintf(stderr, "end_time='%-.16s'\n", (end_time == 0L) ?
				"" : ctime(&end_time));
	}

exit:
	regfree(&uuid_regex);
	return rc;
error:
	rc = 1;
	goto exit;
}
コード例 #2
0
/*
 * This function examines the commandline parameters and sets various
 * search options. It returns a 0 on success and < 0 on failure
 */
int check_params(int count, char *vars[])
{
	int c = 1;
	int retval = 0;
	const char *optarg;

	while (c < count && retval == 0) {
		// Go ahead and point to the next argument
		if (c+1 < count) {
			if (vars[c+1][0] != '-')
				optarg = vars[c+1];
			else
				optarg = NULL;
		} else
			optarg = NULL;

		switch (audit_lookup_option(vars[c])) {
		case R_INFILE:
			if (!optarg) {
				fprintf(stderr, 
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
			} else {
				user_file = strdup(optarg);
				if (user_file == NULL)
					retval = -1;
				c++;
			}
			break;
		case R_LOG_TIMES:
			if (set_report(RPT_TIME))
				retval = -1;
			else
				set_detail(D_DETAILED);
			break;
		case R_AVCS:
			if (set_report(RPT_AVC))
				retval = -1;
			else { 
				set_detail(D_DETAILED);
				event_comm = dummy;
				event_subject = dummy;
				event_object = dummy;
			}
			break;
		case R_AUTH:
			if (set_report(RPT_AUTH))
				retval = -1;
			else {
				set_detail(D_DETAILED);
				event_exe = dummy;
				event_hostname = dummy;
				event_terminal = dummy;
			}
			break;
		case R_MAC:
			if (set_report(RPT_MAC))
				retval = -1;
			else 
				set_detail(D_DETAILED);
			break;
		case R_CONFIGS:
			if (set_report(RPT_CONFIG))
				retval = -1;
			else 
				set_detail(D_DETAILED);
			break;
		case R_CRYPTO:
			if (set_report(RPT_CRYPTO))
				retval = -1;
			else 
				set_detail(D_DETAILED);
			break;
		case R_LOGINS:
			if (set_report(RPT_LOGIN))
				retval = -1;
			else {
				set_detail(D_DETAILED);
				event_exe = dummy;
				event_hostname = dummy;
				event_terminal = dummy;
			}
			break;
		case R_ACCT_MODS:
			if (set_report(RPT_ACCT_MOD))
				retval = -1;
			else { 
				set_detail(D_DETAILED);
				event_exe = dummy;
				event_hostname = dummy;
				event_terminal = dummy;
			}
			break;
		case R_EVENTS:
			if (set_report(RPT_EVENT))
				retval = -1;
			else {
//				if (!optarg)
					set_detail(D_DETAILED);
//				else {
//					UNIMPLEMENTED;
//					set_detail(D_SPECIFIC);
//					if (isdigit(optarg[0])) {
//						errno = 0;
//						event_id = strtoul(optarg,
//							NULL, 10);
//						if (errno) {
//							fprintf(stderr,
//					"Illegal value for audit event ID");
//							retval = -1;
//						}
//						c++;
//					} else {
//						fprintf(stderr,
//			"Audit event id must be a numeric value, was %s\n",
//						optarg);
//						retval = -1;
//					}
//				}
			}
			break;
		case R_FILES:
			if (set_report(RPT_FILE))
				retval = -1;
			else {
				if (!optarg) {
					set_detail(D_DETAILED);
					event_filename = dummy;
					event_exe = dummy;
				} else {
					UNIMPLEMENTED;
				}
			}
			break;
		case R_HOSTS:
			if (set_report(RPT_HOST))
				retval = -1;
			else {
				if (!optarg) {
					set_detail(D_DETAILED);
					event_hostname = dummy;
				} else {
					UNIMPLEMENTED;
				}
			}
			break;
		case R_INTERPRET:
			report_format = RPT_INTERP;
			if (optarg) {
				fprintf(stderr,
					"Argument is NOT required for %s\n",
					vars[c]);
				retval = -1;
			}
			break;
		case R_PIDS:
			if (set_report(RPT_PID))
				retval = -1;
			else {
				if (!optarg) {
					set_detail(D_DETAILED);
					event_exe = dummy;
				} else {
					UNIMPLEMENTED;
				}
			}
			break;
		case R_SYSCALLS:
			if (set_report(RPT_SYSCALL))
				retval = -1;
			else {
				if (!optarg) {
					set_detail(D_DETAILED);
					event_comm = dummy;
				} else {
					UNIMPLEMENTED;
				}
			}
			break;
		case R_TERMINALS:
			if (set_report(RPT_TERM))
				retval = -1;
			else {
				if (!optarg) {
					set_detail(D_DETAILED);
					event_terminal = dummy;
					event_hostname = dummy;
					event_exe = dummy;
				} else {
					UNIMPLEMENTED;
				}
			}
			break;
		case R_USERS:
			if (set_report(RPT_USER))
				retval = -1;
			else {
				if (!optarg) {
					set_detail(D_DETAILED);
					event_terminal = dummy;
					event_hostname = dummy;
					event_exe = dummy;
				} else {
					UNIMPLEMENTED;
				}
			}
			break;
		case R_EXES:
			if (set_report(RPT_EXE))
				retval = -1;
			else {
				if (!optarg) {
					set_detail(D_DETAILED);
					event_terminal = dummy;
					event_hostname = dummy;
					event_exe = dummy;
				} else {
					UNIMPLEMENTED;
				}
			}
			break;
		case R_ANOMALY:
			if (set_report(RPT_ANOMALY))
				retval = -1;
			else {
				if (!optarg) {
					set_detail(D_DETAILED);
					event_terminal = dummy;
					event_hostname = dummy;
					event_exe = dummy;
					event_comm = dummy;
				} else {
					UNIMPLEMENTED;
				}
			}
			break;
		case R_RESPONSE:
			if (set_report(RPT_RESPONSE))
				retval = -1;
			else {
				if (!optarg) {
					set_detail(D_DETAILED);
				} else {
					UNIMPLEMENTED;
				}
			}
			break;
		case R_KEYS:
			if (set_report(RPT_KEY))
				retval = -1;
			else {
				if (!optarg) {
					set_detail(D_DETAILED);
					event_exe = dummy;
					event_key = dummy;
				} else {
					UNIMPLEMENTED;
				}
			}
			break;
		case R_TTY:
			if (set_report(RPT_TTY))
				retval = -1;
			else {
				event_session_id = 1;
				event_terminal = dummy;
				event_comm = dummy;
				set_detail(D_DETAILED);
			}
			break;
		case R_TIME_END:
			if (optarg) {
				if ( (c+2 < count) && vars[c+2] && 
					(vars[c+2][0] != '-') ) {
				/* Have both date and time - check order*/
					if (strchr(optarg, ':')) {
						if (ausearch_time_end(vars[c+2],
								 optarg) != 0) 
							retval = -1;
					} else {
						if (ausearch_time_end(optarg, 
								vars[c+2]) != 0)
							retval = -1;
					}
					c++;			
				} else {
					// Check against recognized words
					int t = lookup_time(optarg);
					if (t >= 0) {
						if (ausearch_time_end(optarg,
								NULL) != 0)
							retval = -1;
					} else if ( (strchr(optarg, ':')) == NULL) {
						/* Only have date */
						if (ausearch_time_end(optarg,
								NULL) != 0)
							retval = -1;
					} else {
						/* Only have time */
						if (ausearch_time_end(NULL,
								optarg) != 0)
							retval = -1;
					}
				}
				c++;			
				break;
			}
			fprintf(stderr,
				"%s requires either date and/or time\n",
				vars[c]);
			retval = -1;
			break;
		case R_TIME_START:
			if (optarg) {
				if ( (c+2 < count) && vars[c+2] && 
					(vars[c+2][0] != '-') ) {
				/* Have both date and time - check order */
					if (strchr(optarg, ':')) {
						if (ausearch_time_start(
							vars[c+2], optarg) != 0)
							retval = -1;
					} else {
						if (ausearch_time_start(optarg, 
								vars[c+2]) != 0)
							retval = -1;
					}
					c++;
				} else {
					// Check against recognized words
					int t = lookup_time(optarg);
					if (t >= 0) {
						if (ausearch_time_start(optarg,
							"00:00:00") != 0)
							retval = -1;
					} else if ( strchr(optarg, ':') == NULL) {
						/* Only have date */
						if (ausearch_time_start(optarg,
							"00:00:00") != 0)
							retval = -1;
					} else {
						/* Only have time */
						if (ausearch_time_start(NULL,
								optarg) != 0)
							retval = -1;
					}
				}
				c++;
				break;
			}
			fprintf(stderr, 
				"%s requires either date and/or time\n",
				vars[c]);
			retval = -1;
			break;
		case R_NODE:
			if (!optarg) {
				fprintf(stderr,
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
			} else {
				snode sn;
				c++;

				if (!event_node_list) {
					event_node_list = malloc(sizeof (slist));
					if (!event_node_list) {
						retval = -1;
						break;
					}
					slist_create(event_node_list);
				}
				
				sn.str = strdup(optarg);
				sn.key = NULL;
				sn.hits=0;
				slist_append(event_node_list, &sn);
			}
			break;
		case R_SUMMARY_DET:
			set_detail(D_SUM);
			break;
		case R_FAILED:
			event_failed = F_FAILED;
			break;
		case R_SUCCESS:
			event_failed = F_SUCCESS;
			break;
		case R_ADD:
			event_conf_act = C_ADD;
			break;
		case R_DEL:
			event_conf_act = C_DEL;
			break;
		case R_IN_LOGS:
			force_logs = 1;
			break;
		case R_VERSION:
	                printf("aureport version %s\n", VERSION);
			exit(0);
			break;
		case R_HELP:
			usage();
			exit(0);
			break;
		default:
			fprintf(stderr, "%s is an unsupported option\n", 
				vars[c]);
			retval = -1;
			break;
		}
		c++;
	}

	if (retval >= 0) {
		if (report_type == RPT_UNSET) {
			if (set_report(RPT_SUMMARY))
				retval = -1;
			else {
				set_detail(D_SUM);
				event_filename = dummy;
				event_hostname = dummy;
				event_terminal = dummy;
				event_exe = dummy;
				event_key = dummy;
			}
		}
	} else
		usage();

	return retval;
}
コード例 #3
0
/*
 * This function examines the commandline parameters and sets various
 * search options. It returns a 0 on success and < 0 on failure
 */
int check_params(int count, char *vars[])
{
	int c = 1;
	int retval = 0;
	const char *optarg;

	if (count < 2) {
		usage();
		return -1;
	}
	while (c < count && retval == 0) {
		// Go ahead and point to the next argument
		if (c+1 < count) {
			if (vars[c+1][0] != '-')
				optarg = vars[c+1];
			else
				optarg = NULL;
		} else
			optarg = NULL;

		switch (audit_lookup_option(vars[c])) {
		case S_EVENT:
			if (!optarg) {
				fprintf(stderr, 
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
				break;
			}
			if (isdigit(optarg[0])) {
				errno = 0;
				event_id = strtoul(optarg, NULL, 10);
				if (errno) {
					fprintf(stderr,
					"Illegal value for audit event ID");
					retval = -1;
				}
				c++;
			} else {
				fprintf(stderr, 
			"Audit event id must be a numeric value, was %s\n",
					optarg);
				retval = -1;
			}
			break;
		case S_COMM:
			if (!optarg) {
				fprintf(stderr, 
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
				break;
			} else {
				event_comm = strdup(optarg);
        	                if (event_comm == NULL)
                	                retval = -1;
				c++;
			}
			break;
		case S_FILENAME:
			if (!optarg) {
				fprintf(stderr, 
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
			} else {
				event_filename = strdup(optarg);
        	                if (event_filename == NULL)
                	                retval = -1;
				c++;
			}
			break;
		case S_KEY:
			if (!optarg) {
				fprintf(stderr, 
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
			} else {
				event_key = strdup(optarg);
        	                if (event_key == NULL)
                	                retval = -1;
				c++;
			}
			break;
		case S_ALL_GID:
			if (!optarg) {
				fprintf(stderr, 
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
				break;
			}
                	if (isdigit(optarg[0])) {
				errno = 0;
                        	event_gid = strtoul(optarg,NULL,10);
				if (errno) {
                        		fprintf(stderr, 
			"Numeric group ID conversion error (%s) for %s\n",
						strerror(errno), optarg);
                                	retval = -1;
				}
                	} else {
				struct group *gr ;

				gr = getgrnam(optarg) ;
				if (gr == NULL) {
                        		fprintf(stderr, 
				"Group ID is non-numeric and unknown (%s)\n",
						optarg);
					retval = -1;
					break;
				}
				event_gid = gr->gr_gid;
                	}
			event_egid = event_gid;
			event_ga = 1;
			c++;
			break;
		case S_EFF_GID:
			if (!optarg) {
				fprintf(stderr, 
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
				break;
			}
                	if (isdigit(optarg[0])) {
				errno = 0;
                        	event_egid = strtoul(optarg,NULL,10);
				if (errno) {
                        		fprintf(stderr, 
			"Numeric group ID conversion error (%s) for %s\n",
						strerror(errno), optarg);
                                	retval = -1;
				}
                	} else {
				struct group *gr ;

				gr = getgrnam(optarg) ;
				if (gr == NULL) {
                        		fprintf(stderr, 
			"Effective group ID is non-numeric and unknown (%s)\n",
						optarg);
					retval = -1;
					break;
				}
				event_egid = gr->gr_gid;
                	}
			c++;
			break;
		case S_GID:
			if (!optarg) {
				fprintf(stderr, 
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
				break;
			}
                	if (isdigit(optarg[0])) {
				errno = 0;
                        	event_gid = strtoul(optarg,NULL,10);
				if (errno) {
                        		fprintf(stderr, 
			"Numeric group ID conversion error (%s) for %s\n",
						strerror(errno), optarg);
                                	retval = -1;
				}
                	} else {
				struct group *gr ;

				gr = getgrnam(optarg) ;
				if (gr == NULL) {
                        		fprintf(stderr, 
				"Group ID is non-numeric and unknown (%s)\n",
						optarg);
					retval = -1;
					break;
				}
				event_gid = gr->gr_gid;
                	}
			c++;
			break;
		case S_HELP:
			usage();
			exit(0);
			break;
		case S_HOSTNAME:
			if (!optarg) {
				fprintf(stderr, 
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
			} else {
				event_hostname = strdup(optarg);
				if (event_hostname == NULL)
					retval = -1;
				c++;
			}
			break;
		case S_INTERP:
			if (report_format == RPT_DEFAULT)
				report_format = RPT_INTERP;
			else {
				fprintf(stderr, 
					"Conflicting output format %s\n",
					vars[c]);
        	                retval = -1;
			}
			if (optarg) {
				fprintf(stderr, 
					"Argument is NOT required for %s\n",
					vars[c]);
        	                retval = -1;
			}
			break;
		case S_INFILE:
			if (!optarg) {
				fprintf(stderr, 
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
			} else {
				user_file = strdup(optarg);
				if (user_file == NULL)
					retval = -1;
				c++;
			}
			break;
		case S_MESSAGE_TYPE:
	                if (!optarg) {
				fprintf(stderr, 
					"Argument is required for %s\n",
					vars[c]);
        	                retval = -1;
	                } else {
				if (strcasecmp(optarg, "ALL") != 0) {
					retval = parse_msg(optarg);
				}
				c++;
			}
			if (retval < 0) {
				int i;
                        	fprintf(stderr, 
					"Valid message types are: ALL ");
				for (i=AUDIT_USER;i<=AUDIT_LAST_VIRT_MSG;i++){
					const char *name;
					if (i == AUDIT_WATCH_INS) // Skip a few
						i = AUDIT_FIRST_USER_MSG;
					name = audit_msg_type_to_name(i);
					if (name)
		                        	fprintf(stderr, "%s ", name);
				}
                        	fprintf(stderr, "\n");
			}
			break;
		case S_OBJECT:
			if (!optarg) {
				fprintf(stderr, 
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
				break;
			} else {
				event_object = strdup(optarg);
        	                if (event_object == NULL)
                	                retval = -1;
				c++;
			}
			break;
		case S_PPID:
			if (!optarg) {
				fprintf(stderr, 
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
				break;
			}
			if (isdigit(optarg[0])) {
				errno = 0;
				event_ppid = strtol(optarg,NULL,10);
				if (errno)
					retval = -1;
				c++;
			} else {
				fprintf(stderr, 
			"Parent process id must be a numeric value, was %s\n",
					optarg);
				retval = -1;
			}
			break;
		case S_PID:
			if (!optarg) {
				fprintf(stderr, 
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
				break;
			}
			if (isdigit(optarg[0])) {
				errno = 0;
				event_pid = strtol(optarg,NULL,10);
				if (errno)
					retval = -1;
				c++;
			} else {
				fprintf(stderr, 
				"Process id must be a numeric value, was %s\n",
					optarg);
				retval = -1;
			}
			break;
		case S_RAW:
			if (report_format == RPT_DEFAULT)
				report_format = RPT_RAW;
			else {
				fprintf(stderr, 
					"Conflicting output format --raw\n");
        	                retval = -1;
			}
			if (optarg) {
				fprintf(stderr, 
					"Argument is NOT required for --raw\n");
        	                retval = -1;
			}
			break;
		case S_NODE:
			if (!optarg) {
				fprintf(stderr, 
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
			} else {
				snode sn;
				c++;

				if (!event_node_list) {
					event_node_list = malloc(sizeof (slist));
					if (!event_node_list) {
						retval = -1;
						break;
					}
					slist_create(event_node_list);
				}
				
				sn.str = strdup(optarg);
				sn.key = NULL;
				sn.hits=0;
				slist_append(event_node_list, &sn);
			}
			break;
		case S_SYSCALL:
			if (!optarg) {
				fprintf(stderr, 
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
				break;
			}
			if (isdigit(optarg[0])) {
				errno = 0;
				event_syscall = (int)strtoul(optarg, NULL, 10);
				if (errno) {
                        		fprintf(stderr, 
			"Syscall numeric conversion error (%s) for %s\n",
						strerror(errno), optarg);
                                	retval = -1;
				}
			} else {
                                int machine;
                                machine = audit_detect_machine();
                                if (machine < 0) {
                                        fprintf(stderr,
                                            "Error detecting machine type");
                                        retval = -1;
					break;
                                }
				event_syscall = audit_name_to_syscall(optarg, 
					machine);
				if (event_syscall == -1) {
					fprintf(stderr, 
						"Syscall %s not found\n",
						optarg);
                                        retval = -1;
				}
                        }
			c++;
			break;
		case S_CONTEXT:
			if (!optarg) {
				fprintf(stderr, 
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
				break;
			} else {
				event_subject = strdup(optarg);
        	                if (event_subject == NULL)
                	                retval = -1;
				event_object = strdup(optarg);
        	                if (event_object == NULL)
                	                retval = -1;
				event_se = 1;
				c++;
			}
			break;
		case S_SUBJECT:
			if (!optarg) {
				fprintf(stderr, 
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
				break;
			} else {
				event_subject = strdup(optarg);
        	                if (event_subject == NULL)
                	                retval = -1;
				c++;
			}
			break;
		case S_OSUCCESS:
			if (!optarg) {
				fprintf(stderr, 
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
				break;
			}
                	if ( (strstr(optarg, "yes")!=NULL) || 
					(strstr(optarg, "no")!=NULL) ) {
                        	if (strcmp(optarg, "yes") == 0)
					event_success = S_SUCCESS;
				else
					event_success = S_FAILED;
                	} else {
                        	fprintf(stderr, 
					"Success must be 'yes' or 'no'.\n");
                        	retval = -1;
                	}
			c++;
			break;
		case S_SESSION:
			if (!optarg) {
				if ((c+1 < count) && vars[c+1])
					optarg = vars[c+1];
				else {
					fprintf(stderr,
						"Argument is required for %s\n",
						vars[c]);
					retval = -1;
					break;
				}
			}
			{ 
			size_t len = strlen(optarg);
			if (isdigit(optarg[0])) {
				errno = 0;
				event_session_id = strtol(optarg,NULL,10);
				if (errno)
					retval = -1;
				c++;
                        } else if (len >= 2 && *(optarg)=='-' &&
                                                (isdigit(optarg[1]))) {
				errno = 0;
                                event_session_id = strtol(optarg, NULL, 0);
				if (errno) {
					retval = -1;
					fprintf(stderr, "Error converting %s\n",
						optarg);
				}
				c++;
			} else {
				fprintf(stderr, 
				"Session id must be a numeric value, was %s\n",
					optarg);
				retval = -1;
			}
			}
			break;
		case S_EXIT:
			if (!optarg) {
				if ((c+1 < count) && vars[c+1])
					optarg = vars[c+1];
				else {
					fprintf(stderr,
						"Argument is required for %s\n",
						vars[c]);
					retval = -1;
					break;
				}
			} 
			{
			size_t len = strlen(optarg);
                        if (isdigit(optarg[0])) {
				errno = 0;
                                event_exit = strtol(optarg, NULL, 0);
				if (errno) {
					retval = -1;
					fprintf(stderr, "Error converting %s\n",
						optarg);
				}
                        } else if (len >= 2 && *(optarg)=='-' &&
                                                (isdigit(optarg[1]))) {
				errno = 0;
                                event_exit = strtol(optarg, NULL, 0);
				if (errno) {
					retval = -1;
					fprintf(stderr, "Error converting %s\n",
						optarg);
				}
                        } else {
                                event_exit = audit_name_to_errno(optarg);
                                if (event_exit == 0) {
					retval = -1;
					fprintf(stderr, 
						"Unknown errno, was %s\n",
						optarg);
				}
                        }
			c++;
			if (retval != -1)
				event_exit_is_set = 1;
			}
			break;
		case S_TIME_END:
			if (optarg) {
				if ( (c+2 < count) && vars[c+2] && 
					(vars[c+2][0] != '-') ) {
				/* Have both date and time - check order*/
					if (strchr(optarg, ':')) {
						if (ausearch_time_end(vars[c+2],
								 optarg) != 0) 
							retval = -1;
					} else {
						if (ausearch_time_end(optarg, 
								vars[c+2]) != 0)
							retval = -1;
					}
					c++;			
				} else {
					// Check against recognized words
					int t = lookup_time(optarg);
					if (t >= 0) {
						if (ausearch_time_end(optarg,
								NULL) != 0)
							retval = -1;
					} else if ( (strchr(optarg, ':')) == NULL) {
						/* Only have date */
						if (ausearch_time_end(optarg,
								NULL) != 0)
							retval = -1;
					} else {
						/* Only have time */
						if (ausearch_time_end(NULL,
								optarg) != 0)
							retval = -1;
					}
				}
				c++;			
				break;
			} 
			fprintf(stderr, 
				"%s requires either date and/or time\n",
				vars[c]);
			retval = -1;
			break;
		case S_TIME_START:
			if (optarg) {
				if ( (c+2 < count) && vars[c+2] && 
					(vars[c+2][0] != '-') ) {
				/* Have both date and time - check order */
					if (strchr(optarg, ':')) {
						if (ausearch_time_start(
							vars[c+2], optarg) != 0)
							retval = -1;
					} else {
						if (ausearch_time_start(optarg, 
								vars[c+2]) != 0)
							retval = -1;
					}
					c++;
				} else {
					// Check against recognized words
					int t = lookup_time(optarg);
					if (t >= 0) {
						if (ausearch_time_start(optarg,
							"00:00:00") != 0)
							retval = -1;
					}
					else if ( strchr(optarg, ':') == NULL) {
						/* Only have date */
						if (ausearch_time_start(optarg,
							"00:00:00") != 0)
							retval = -1;
					} else {
						/* Only have time */
						if (ausearch_time_start(NULL,
								optarg) != 0)
							retval = -1;
					}
				}
				c++;
				break;
			}
			fprintf(stderr, 
				"%s requires either date and/or time\n",
				vars[c]);
			retval = -1;
			break;
		case S_TERMINAL:
			if (!optarg) {
				fprintf(stderr, 
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
                	} else { 
				event_terminal = strdup(optarg);
				if (event_terminal == NULL)
        	                        retval = -1;
				c++;
			}
			break;
		case S_UID:
			if (!optarg) {
				fprintf(stderr, 
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
				break;
			}
                	if (isdigit(optarg[0])) {
				errno = 0;
                        	event_uid = strtoul(optarg,NULL,10);
				if (errno) {
                        		fprintf(stderr, 
			"Numeric user ID conversion error (%s) for %s\n",
						strerror(errno), optarg);
                                	retval = -1;
				}
                	} else {
				struct passwd *pw;

				pw = getpwnam(optarg);
				if (pw == NULL) {
                        		fprintf(stderr, 
			"Effective user ID is non-numeric and unknown (%s)\n",
						optarg);
					retval = -1;
					break;
				}
				event_uid = pw->pw_uid;
                	}
			c++;
			break;
		case S_EFF_UID:
			if (!optarg) {
				fprintf(stderr, 
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
				break;
			}
                	if (isdigit(optarg[0])) {
				errno = 0;
                        	event_euid = strtoul(optarg,NULL,10);
				if (errno) {
                        		fprintf(stderr, 
			"Numeric user ID conversion error (%s) for %s\n",
						strerror(errno), optarg);
                                	retval = -1;
				}
                	} else {
				struct passwd *pw ;

				pw = getpwnam(optarg) ;
				if (pw == NULL) {
                        		fprintf(stderr, 
				"User ID is non-numeric and unknown (%s)\n",
						optarg);
					retval = -1;
					break;
				}
				event_euid = pw->pw_uid;
                	}
			c++;
			break;
		case S_ALL_UID:
			if (!optarg) {
				fprintf(stderr, 
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
				break;
			}
                	if (isdigit(optarg[0])) {
				errno = 0;
                        	event_uid = strtoul(optarg,NULL,10);
				if (errno) {
                        		fprintf(stderr, 
			"Numeric user ID conversion error (%s) for %s\n",
						strerror(errno), optarg);
                                	retval = -1;
				}
                	} else {
				struct passwd *pw ;

				pw = getpwnam(optarg) ;
				if (pw == NULL) {
                        		fprintf(stderr, 
				"User ID is non-numeric and unknown (%s)\n",
						optarg);
					retval = -1;
					break;
				}
				event_uid = pw->pw_uid;
                	}
			event_ua = 1;
			event_euid = event_uid;
			event_loginuid = event_uid;
			c++;
			break;
		case S_LOGINID:
			if (!optarg) {
				if ((c+1 < count) && vars[c+1])
					optarg = vars[c+1];
				else {
					fprintf(stderr,
						"Argument is required for %s\n",
						vars[c]);
					retval = -1;
					break;
				}
			}
			{
			size_t len = strlen(optarg);
                        if (isdigit(optarg[0])) {
				errno = 0;
                        	event_loginuid = strtoul(optarg,NULL,10);
				if (errno) {
                        		fprintf(stderr, 
			"Numeric user ID conversion error (%s) for %s\n",
						strerror(errno), optarg);
                                        retval = -1;
				}
                        } else if (len >= 2 && *(optarg)=='-' &&
                                                (isdigit(optarg[1]))) {
				errno = 0;
                                event_loginuid = strtol(optarg, NULL, 0);
				if (errno) {
					retval = -1;
					fprintf(stderr, "Error converting %s\n",
						optarg);
				}
                        } else {
				struct passwd *pw ;

				pw = getpwnam(optarg) ;
				if (pw == NULL) {
                        		fprintf(stderr, 
			"Login user ID is non-numeric and unknown (%s)\n",
						optarg);
					retval = -1;
					break;
				}
				event_loginuid = pw->pw_uid;
                        }
			}
			c++;
			break;
		case S_UUID:
			if (!optarg) {
				fprintf(stderr,
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
			} else {
				event_uuid = strdup(optarg);
				if (event_uuid == NULL) {
					retval = -1;
				}
				c++;
			}
			break;
		case S_VMNAME:
			if (!optarg) {
				fprintf(stderr,
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
			} else {
				event_vmname= strdup(optarg);
				if (event_vmname == NULL) {
					retval = -1;
				}
				c++;
			}
			break;
		case S_VERSION:
	                printf("ausearch version %s\n", VERSION);
			exit(0);
			break;
		case S_EXACT_MATCH:
			event_exact_match=1;
			break;
		case S_IN_LOGS:
			force_logs = 1;
			break;
		case S_JUST_ONE:
			just_one = 1;
			break;
		case S_EXECUTABLE:
			if (!optarg) {
				fprintf(stderr, 
					"Argument is required for %s\n",
					vars[c]);
				retval = -1;
	               	} else { 
				event_exe = strdup(optarg);
				if (event_exe == NULL)
       	                	        retval = -1;
				c++;
			}
			break;
		case S_LINEBUFFERED:
			line_buffered = 1;
			break;
		default:
			fprintf(stderr, "%s is an unsupported option\n", 
				vars[c]);
			retval = -1;
			break;
		}
		c++;
	}

	return retval;
}