1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* 28 * daytime inetd service - both stream and dgram based. 29 * Return human-readable time of day. 30 */ 31 32 #include <sys/types.h> 33 #include <sys/socket.h> 34 #include <unistd.h> 35 #include <stdio.h> 36 #include <strings.h> 37 #include <netinet/in.h> 38 #include <inetsvc.h> 39 40 41 #define TIMEBUF_SIZE 26 42 43 44 static const char * 45 daytime(void) 46 { 47 time_t clock; 48 static char buf[TIMEBUF_SIZE]; 49 50 clock = time(NULL); 51 (void) strlcpy(buf, ctime(&clock), sizeof (buf)); 52 /* 53 * Format of ctime is "Fri Sep 13 00:00:00 1986\n\0". To conform to the 54 * required format as specified in RFCs 867 and 854 we replace the 55 * "\n\0" with "\r\n". 56 */ 57 buf[TIMEBUF_SIZE - 2] = '\r'; 58 buf[TIMEBUF_SIZE - 1] = '\n'; 59 60 return (buf); 61 } 62 63 /* ARGSUSED3 */ 64 static void 65 daytime_dg(int s, const struct sockaddr *sap, int sa_size, const void *buf, 66 size_t sz) 67 { 68 (void) safe_sendto(s, daytime(), TIMEBUF_SIZE, 0, sap, sa_size); 69 } 70 71 int 72 main(int argc, char *argv[]) 73 { 74 opterr = 0; /* disable getopt error msgs */ 75 switch (getopt(argc, argv, "ds")) { 76 case 'd': 77 dg_template(daytime_dg, STDIN_FILENO, NULL, 0); 78 break; 79 case 's': 80 (void) safe_write(STDIN_FILENO, daytime(), TIMEBUF_SIZE); 81 break; 82 default: 83 return (1); 84 } 85 86 return (0); 87 } 88