1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate #include <stdarg.h> 30*0Sstevel@tonic-gate #include <errno.h> 31*0Sstevel@tonic-gate #include <stdio.h> 32*0Sstevel@tonic-gate #include <syslog.h> 33*0Sstevel@tonic-gate #include <libintl.h> 34*0Sstevel@tonic-gate #include <string.h> 35*0Sstevel@tonic-gate #include <limits.h> 36*0Sstevel@tonic-gate 37*0Sstevel@tonic-gate #include "dhcpmsg.h" 38*0Sstevel@tonic-gate 39*0Sstevel@tonic-gate static boolean_t is_daemon = B_FALSE; 40*0Sstevel@tonic-gate static boolean_t is_verbose = B_FALSE; 41*0Sstevel@tonic-gate static char program[PATH_MAX] = "<unknown>"; 42*0Sstevel@tonic-gate static int debug_level; 43*0Sstevel@tonic-gate 44*0Sstevel@tonic-gate static const char *err_to_string(int); 45*0Sstevel@tonic-gate static int err_to_syslog(int); 46*0Sstevel@tonic-gate 47*0Sstevel@tonic-gate /* 48*0Sstevel@tonic-gate * dhcpmsg(): logs a message to the console or to syslog 49*0Sstevel@tonic-gate * 50*0Sstevel@tonic-gate * input: int: the level to log the message at 51*0Sstevel@tonic-gate * const char *: a printf-like format string 52*0Sstevel@tonic-gate * ...: arguments to the format string 53*0Sstevel@tonic-gate * output: void 54*0Sstevel@tonic-gate */ 55*0Sstevel@tonic-gate 56*0Sstevel@tonic-gate /*PRINTFLIKE2*/ 57*0Sstevel@tonic-gate void 58*0Sstevel@tonic-gate dhcpmsg(int errlevel, const char *fmt, ...) 59*0Sstevel@tonic-gate { 60*0Sstevel@tonic-gate va_list ap; 61*0Sstevel@tonic-gate char buf[512]; 62*0Sstevel@tonic-gate char *errmsg; 63*0Sstevel@tonic-gate 64*0Sstevel@tonic-gate if ((errlevel == MSG_DEBUG2 && (debug_level < 2)) || 65*0Sstevel@tonic-gate (errlevel == MSG_DEBUG && (debug_level < 1)) || 66*0Sstevel@tonic-gate (errlevel == MSG_VERBOSE && !is_verbose)) 67*0Sstevel@tonic-gate return; 68*0Sstevel@tonic-gate 69*0Sstevel@tonic-gate va_start(ap, fmt); 70*0Sstevel@tonic-gate 71*0Sstevel@tonic-gate /* 72*0Sstevel@tonic-gate * either log to stderr, or log to syslog. print out unix 73*0Sstevel@tonic-gate * error message if errlevel is MSG_ERR and errno is set 74*0Sstevel@tonic-gate */ 75*0Sstevel@tonic-gate 76*0Sstevel@tonic-gate if (is_daemon) { 77*0Sstevel@tonic-gate (void) snprintf(buf, sizeof (buf), (errlevel == MSG_ERR && 78*0Sstevel@tonic-gate errno != 0) ? "%s: %%m\n" : "%s\n", gettext(fmt)); 79*0Sstevel@tonic-gate (void) vsyslog(err_to_syslog(errlevel), buf, ap); 80*0Sstevel@tonic-gate } else { 81*0Sstevel@tonic-gate errmsg = strerror(errno); 82*0Sstevel@tonic-gate if (errmsg == NULL) 83*0Sstevel@tonic-gate errmsg = dgettext(TEXT_DOMAIN, "<unknown error>"); 84*0Sstevel@tonic-gate 85*0Sstevel@tonic-gate (void) snprintf(buf, sizeof (buf), (errlevel == MSG_ERR && 86*0Sstevel@tonic-gate errno != 0) ? "%s: %s: %s: %s\n" : "%s: %s: %s\n", program, 87*0Sstevel@tonic-gate dgettext(TEXT_DOMAIN, err_to_string(errlevel)), 88*0Sstevel@tonic-gate gettext(fmt), errmsg); 89*0Sstevel@tonic-gate 90*0Sstevel@tonic-gate (void) vfprintf(stderr, buf, ap); 91*0Sstevel@tonic-gate } 92*0Sstevel@tonic-gate 93*0Sstevel@tonic-gate va_end(ap); 94*0Sstevel@tonic-gate } 95*0Sstevel@tonic-gate 96*0Sstevel@tonic-gate /* 97*0Sstevel@tonic-gate * dhcpmsg_init(): opens and initializes the DHCP messaging facility 98*0Sstevel@tonic-gate * 99*0Sstevel@tonic-gate * input: const char *: the name of the executable 100*0Sstevel@tonic-gate * boolean_t: whether the executable is a daemon 101*0Sstevel@tonic-gate * boolean_t: whether the executable is running "verbosely" 102*0Sstevel@tonic-gate * int: the debugging level the executable is being run at 103*0Sstevel@tonic-gate * output: void 104*0Sstevel@tonic-gate */ 105*0Sstevel@tonic-gate 106*0Sstevel@tonic-gate void 107*0Sstevel@tonic-gate dhcpmsg_init(const char *program_name, boolean_t daemon, boolean_t verbose, 108*0Sstevel@tonic-gate int level) 109*0Sstevel@tonic-gate { 110*0Sstevel@tonic-gate (void) strlcpy(program, program_name, sizeof (program)); 111*0Sstevel@tonic-gate 112*0Sstevel@tonic-gate debug_level = level; 113*0Sstevel@tonic-gate is_verbose = verbose; 114*0Sstevel@tonic-gate 115*0Sstevel@tonic-gate if (daemon) { 116*0Sstevel@tonic-gate is_daemon = B_TRUE; 117*0Sstevel@tonic-gate (void) openlog(program, LOG_PID, LOG_DAEMON); 118*0Sstevel@tonic-gate if (is_verbose) { 119*0Sstevel@tonic-gate syslog(err_to_syslog(MSG_VERBOSE), "%s", 120*0Sstevel@tonic-gate dgettext(TEXT_DOMAIN, "Daemon started")); 121*0Sstevel@tonic-gate } 122*0Sstevel@tonic-gate } 123*0Sstevel@tonic-gate } 124*0Sstevel@tonic-gate 125*0Sstevel@tonic-gate /* 126*0Sstevel@tonic-gate * dhcpmsg_fini(): closes the DHCP messaging facility. 127*0Sstevel@tonic-gate * 128*0Sstevel@tonic-gate * input: void 129*0Sstevel@tonic-gate * output: void 130*0Sstevel@tonic-gate */ 131*0Sstevel@tonic-gate 132*0Sstevel@tonic-gate void 133*0Sstevel@tonic-gate dhcpmsg_fini(void) 134*0Sstevel@tonic-gate { 135*0Sstevel@tonic-gate if (is_daemon) { 136*0Sstevel@tonic-gate if (is_verbose) { 137*0Sstevel@tonic-gate syslog(err_to_syslog(MSG_VERBOSE), "%s", 138*0Sstevel@tonic-gate dgettext(TEXT_DOMAIN, "Daemon terminated")); 139*0Sstevel@tonic-gate } 140*0Sstevel@tonic-gate closelog(); 141*0Sstevel@tonic-gate } 142*0Sstevel@tonic-gate } 143*0Sstevel@tonic-gate 144*0Sstevel@tonic-gate /* 145*0Sstevel@tonic-gate * err_to_syslog(): converts a dhcpmsg log level into a syslog log level 146*0Sstevel@tonic-gate * 147*0Sstevel@tonic-gate * input: int: the dhcpmsg log level 148*0Sstevel@tonic-gate * output: int: the syslog log level 149*0Sstevel@tonic-gate */ 150*0Sstevel@tonic-gate 151*0Sstevel@tonic-gate static int 152*0Sstevel@tonic-gate err_to_syslog(int errlevel) 153*0Sstevel@tonic-gate { 154*0Sstevel@tonic-gate switch (errlevel) { 155*0Sstevel@tonic-gate 156*0Sstevel@tonic-gate case MSG_DEBUG: 157*0Sstevel@tonic-gate case MSG_DEBUG2: 158*0Sstevel@tonic-gate return (LOG_DEBUG); 159*0Sstevel@tonic-gate 160*0Sstevel@tonic-gate case MSG_ERROR: 161*0Sstevel@tonic-gate case MSG_ERR: 162*0Sstevel@tonic-gate return (LOG_ERR); 163*0Sstevel@tonic-gate 164*0Sstevel@tonic-gate case MSG_WARNING: 165*0Sstevel@tonic-gate return (LOG_WARNING); 166*0Sstevel@tonic-gate 167*0Sstevel@tonic-gate case MSG_NOTICE: 168*0Sstevel@tonic-gate return (LOG_NOTICE); 169*0Sstevel@tonic-gate 170*0Sstevel@tonic-gate case MSG_CRIT: 171*0Sstevel@tonic-gate return (LOG_CRIT); 172*0Sstevel@tonic-gate 173*0Sstevel@tonic-gate case MSG_VERBOSE: 174*0Sstevel@tonic-gate case MSG_INFO: 175*0Sstevel@tonic-gate return (LOG_INFO); 176*0Sstevel@tonic-gate } 177*0Sstevel@tonic-gate 178*0Sstevel@tonic-gate return (LOG_INFO); 179*0Sstevel@tonic-gate } 180*0Sstevel@tonic-gate 181*0Sstevel@tonic-gate /* 182*0Sstevel@tonic-gate * err_to_string(): converts a log level into a string 183*0Sstevel@tonic-gate * 184*0Sstevel@tonic-gate * input: int: the log level 185*0Sstevel@tonic-gate * output: const char *: the stringified log level 186*0Sstevel@tonic-gate */ 187*0Sstevel@tonic-gate 188*0Sstevel@tonic-gate static const char * 189*0Sstevel@tonic-gate err_to_string(int errlevel) 190*0Sstevel@tonic-gate { 191*0Sstevel@tonic-gate switch (errlevel) { 192*0Sstevel@tonic-gate 193*0Sstevel@tonic-gate case MSG_DEBUG: 194*0Sstevel@tonic-gate case MSG_DEBUG2: 195*0Sstevel@tonic-gate return ("debug"); 196*0Sstevel@tonic-gate 197*0Sstevel@tonic-gate case MSG_ERR: 198*0Sstevel@tonic-gate case MSG_ERROR: 199*0Sstevel@tonic-gate return ("error"); 200*0Sstevel@tonic-gate 201*0Sstevel@tonic-gate case MSG_WARNING: 202*0Sstevel@tonic-gate return ("warning"); 203*0Sstevel@tonic-gate 204*0Sstevel@tonic-gate case MSG_NOTICE: 205*0Sstevel@tonic-gate return ("notice"); 206*0Sstevel@tonic-gate 207*0Sstevel@tonic-gate case MSG_CRIT: 208*0Sstevel@tonic-gate return ("CRITICAL"); 209*0Sstevel@tonic-gate 210*0Sstevel@tonic-gate case MSG_VERBOSE: 211*0Sstevel@tonic-gate case MSG_INFO: 212*0Sstevel@tonic-gate return ("info"); 213*0Sstevel@tonic-gate } 214*0Sstevel@tonic-gate 215*0Sstevel@tonic-gate return ("<unknown>"); 216*0Sstevel@tonic-gate } 217