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 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* 30 * daytime inetd service - both stream and dgram based. 31 * Return human-readable time of day. 32 */ 33 34 #include <sys/types.h> 35 #include <sys/socket.h> 36 #include <unistd.h> 37 #include <stdio.h> 38 #include <strings.h> 39 #include <netinet/in.h> 40 #include <inetsvc.h> 41 42 43 #define TIMEBUF_SIZE 26 44 45 46 static const char * 47 daytime(void) 48 { 49 time_t clock; 50 static char buf[TIMEBUF_SIZE]; 51 52 clock = time(NULL); 53 (void) strlcpy(buf, ctime(&clock), sizeof (buf)); 54 /* 55 * Format of ctime is "Fri Sep 13 00:00:00 1986\n\0". To conform to the 56 * required format as specified in RFCs 867 and 854 we replace the 57 * "\n\0" with "\r\n". 58 */ 59 buf[TIMEBUF_SIZE - 2] = '\r'; 60 buf[TIMEBUF_SIZE - 1] = '\n'; 61 62 return (buf); 63 } 64 65 /* ARGSUSED3 */ 66 static void 67 daytime_dg(int s, const struct sockaddr *sap, int sa_size, const void *buf, 68 size_t sz) 69 { 70 (void) safe_sendto(s, daytime(), TIMEBUF_SIZE, 0, sap, sa_size); 71 } 72 73 int 74 main(int argc, char *argv[]) 75 { 76 opterr = 0; /* disable getopt error msgs */ 77 switch (getopt(argc, argv, "ds")) { 78 case 'd': 79 dg_template(daytime_dg, STDIN_FILENO, NULL, 0); 80 break; 81 case 's': 82 (void) safe_write(STDIN_FILENO, daytime(), TIMEBUF_SIZE); 83 break; 84 default: 85 return (1); 86 } 87 88 return (0); 89 } 90