| 1 | /* Copyright (c) 1983, 1988, 1993
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| 2 | * The Regents of the University of California. All rights reserved.
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| 3 | *
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| 4 | * Redistribution and use in source and binary forms, with or without
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| 5 | * modification, are permitted provided that the following conditions
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| 6 | * are met:
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| 7 | * 1. Redistributions of source code must retain the above copyright
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| 8 | * notice, this list of conditions and the following disclaimer.
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| 9 | * 2. Redistributions in binary form must reproduce the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer in the
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| 11 | * documentation and/or other materials provided with the distribution.
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| 12 | * 3. All advertising materials mentioning features or use of this software
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| 13 | * must display the following acknowledgement:
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| 14 | * This product includes software developed by the University of
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| 15 | * California, Berkeley and its contributors.
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| 16 | * 4. Neither the name of the University nor the names of its contributors
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| 17 | * may be used to endorse or promote products derived from this software
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| 18 | * without specific prior written permission.
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| 19 | *
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| 20 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 30 | * SUCH DAMAGE.
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| 31 | *
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| 32 | * #if defined(LIBC_SCCS) && !defined(lint)
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| 33 | * static char sccsid[] = "@(#)syslog.c 8.4 (Berkeley) 3/18/94";
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| 34 | * #endif
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| 35 | *
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| 36 | * Author: Eric Allman
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| 37 | * Modified to use UNIX domain IPC by Ralph Campbell
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| 38 | * Patched March 12, 1996 by A. Ian Vogelesang <vogelesang@hdshq.com>
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| 39 | * Rewritten by Martin Mares <mj@atrey.karlin.mff.cuni.cz> on May 14, 1997
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| 40 | * Rewritten by G. Falzoni <gfalzoni@inwind.it> for porting to Minix
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| 41 | *
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| 42 | * $Id: syslog.c,v 1.1 2006/04/03 13:07:42 beng Exp $
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| 43 | */
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| 44 | #include <sys/types.h>
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| 45 | #include <stdlib.h>
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| 46 | #include <stdio.h>
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| 47 | #include <string.h>
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| 48 | #include <stdarg.h>
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| 49 | #include <time.h>
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| 50 | #include <fcntl.h>
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| 51 | #include <unistd.h>
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| 52 | #include <syslog.h>
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| 53 | #include <sys/ioctl.h>
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| 54 | #include <net/netlib.h>
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| 55 | #include <net/hton.h>
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| 56 | #include <net/gen/in.h>
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| 57 | #include <net/gen/udp.h>
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| 58 | #include <net/gen/udp_io.h>
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| 59 | #include <net/gen/netdb.h>
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| 60 | #include <errno.h>
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| 61 | #include <net/gen/inet.h>
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| 62 |
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| 63 | static int LogPid = (-1);
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| 64 | static int nfd = (-1);
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| 65 | static int LogFacility = LOG_USER;
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| 66 | static int LogFlags = 0;
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| 67 | static char TagBuffer[40] = "syslog";
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| 68 |
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| 69 | /*
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| 70 | ** OPENLOG -- open system log
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| 71 | ** - establishes a channel to syslogd using UDP device
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| 72 | ** (port 514 is used _ syslog/udp)
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| 73 | ** - stores program tag (if not NULL) and other options
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| 74 | ** for use by syslog
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| 75 | */
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| 76 | void openlog(const char *ident, int option, int facility)
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| 77 | {
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| 78 | struct nwio_udpopt udpopt;
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| 79 |
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| 80 | /* Stores logging flags */
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| 81 | LogFlags = option & (LOG_PID | LOG_PERROR | LOG_CONS);
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| 82 | /* Stores process id. if LOG_PID was specified */
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| 83 | if (option & LOG_PID) LogPid = getpid();
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| 84 | /* Stores the requested facility */
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| 85 | LogFacility = facility;
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| 86 | /* Stores log tag if supplied */
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| 87 | if (ident != NULL && *ident != '0' && ident != TagBuffer) {
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| 88 | strncpy(TagBuffer, ident, sizeof(TagBuffer));
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| 89 | TagBuffer[sizeof(TagBuffer) - 1] = '0';
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| 90 | }
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| 91 |
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| 92 | /* Opens channel to syslog daemon via UDP device */
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| 93 | /* Static values used to minimize code */
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| 94 | if (option & LOG_NDELAY) {
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| 95 | /* Opens UDP device */
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| 96 | if ((nfd = open(UDP_DEVICE, O_RDWR)) < 0) {
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| 97 | /* Report error */ ;
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| 98 | }
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| 99 | /* Sets options for UDP device */
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| 100 | udpopt.nwuo_flags = NWUO_SHARED | NWUO_LP_SET | NWUO_DI_LOC |
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| 101 | NWUO_DI_BROAD | NWUO_RP_SET | NWUO_RA_SET |
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| 102 | NWUO_RWDATONLY | NWUO_DI_IPOPT;
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| 103 | udpopt.nwuo_locaddr = udpopt.nwuo_remaddr = htonl(0x7F000001L);
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| 104 | udpopt.nwuo_locport = udpopt.nwuo_remport = htons(514);
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| 105 | if (ioctl(nfd, NWIOSUDPOPT, &udpopt) < 0 ||
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| 106 | ioctl(nfd, NWIOGUDPOPT, &udpopt) < 0) {
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| 107 | /* Report error */ ;
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| 108 | }
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| 109 | }
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| 110 | return;
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| 111 | }
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| 112 |
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| 113 | /*
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| 114 | ** SYSLOG -- print message on log file
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| 115 | **
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| 116 | ** This routine looks a lot like printf, except that it outputs to the
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| 117 | ** log file instead of the standard output. Also:
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| 118 | ** - adds a timestamp,
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| 119 | ** - prints the module name in front of the message,
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| 120 | ** - has some other formatting types (or will sometime),
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| 121 | ** - adds a newline on the end of the message.
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| 122 | **
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| 123 | ** The output of this routine is intended to be read by syslogd(8).
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| 124 | */
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| 125 | void syslog(int lprty, const char *msg,...)
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| 126 | {
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| 127 | time_t now;
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| 128 | char buff[512];
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| 129 | int len, rc;
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| 130 | va_list ap;
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| 131 |
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| 132 | /* First log message open chnnel to syslog */
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| 133 | if (nfd < 0) openlog(TagBuffer, LogFlags | LOG_NDELAY, LogFacility);
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| 134 | time(&now);
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| 135 | len = sprintf(buff, "<%d>%.15s %s: ",
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| 136 | LogFacility | lprty, ctime(&now) + 4, TagBuffer);
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| 137 | if (LogFlags & LOG_PID) {
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| 138 | len -= 2;
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| 139 | len += sprintf(buff + len, "[%d]: ", LogPid);
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| 140 | }
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| 141 | va_start(ap, msg);
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| 142 | len += vsprintf(buff + len, msg, ap);
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| 143 | va_end(ap);
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| 144 | rc = write(nfd, buff, len);
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| 145 | if ((rc != len && LogFlags & LOG_CONS) || LogFlags & LOG_PERROR) {
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| 146 | write(STDERR_FILENO, buff, len);
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| 147 | write(STDERR_FILENO, "\n", 1);
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| 148 | }
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| 149 | return;
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| 150 | }
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| 151 |
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| 152 | /*
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| 153 | ** CLOSELOG -- close access to syslogd
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| 154 | ** - closes UDP channel
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| 155 | ** - restores default values
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| 156 | */
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| 157 | void closelog(void)
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| 158 | {
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| 159 |
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| 160 | close(nfd);
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| 161 | LogPid = nfd = -1;
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| 162 | LogFacility = LOG_USER;
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| 163 | LogFlags = 0;
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| 164 | return;
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| 165 | }
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| 166 |
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| 167 | /** syslog.c **/
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