1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#) Copyright (c) 1983, 1993 The Regents of the University of California. All rights reserved. 34 * @(#)logger.c 8.1 (Berkeley) 6/6/93 35 * $FreeBSD: src/usr.bin/logger/logger.c,v 1.5.2.3 2001/09/06 17:38:57 ru Exp $ 36 * $DragonFly: src/usr.bin/logger/logger.c,v 1.2 2003/06/17 04:29:28 dillon Exp $ 37 */ 38 39 #include <sys/types.h> 40 #include <sys/socket.h> 41 #include <netinet/in.h> 42 43 #include <ctype.h> 44 #include <err.h> 45 #include <netdb.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <unistd.h> 50 51 #define SYSLOG_NAMES 52 #include <syslog.h> 53 54 int decode __P((char *, CODE *)); 55 int pencode __P((char *)); 56 static void logmessage __P((int, char *, char *)); 57 static void usage __P((void)); 58 59 struct socks { 60 int sock; 61 int addrlen; 62 struct sockaddr_storage addr; 63 }; 64 65 #ifdef INET6 66 int family = PF_UNSPEC; /* protocol family (IPv4, IPv6 or both) */ 67 #else 68 int family = PF_INET; /* protocol family (IPv4 only) */ 69 #endif 70 int send_to_all = 0; /* send message to all IPv4/IPv6 addresses */ 71 72 /* 73 * logger -- read and log utility 74 * 75 * Reads from an input and arranges to write the result on the system 76 * log. 77 */ 78 int 79 main(argc, argv) 80 int argc; 81 char *argv[]; 82 { 83 int ch, logflags, pri; 84 char *tag, *host, buf[1024]; 85 86 tag = NULL; 87 host = NULL; 88 pri = LOG_USER | LOG_NOTICE; 89 logflags = 0; 90 unsetenv("TZ"); 91 while ((ch = getopt(argc, argv, "46Af:h:ip:st:")) != -1) 92 switch((char)ch) { 93 case '4': 94 family = PF_INET; 95 break; 96 #ifdef INET6 97 case '6': 98 family = PF_INET6; 99 break; 100 #endif 101 case 'A': 102 send_to_all++; 103 break; 104 case 'f': /* file to log */ 105 if (freopen(optarg, "r", stdin) == NULL) 106 err(1, "%s", optarg); 107 break; 108 case 'h': /* hostname to deliver to */ 109 host = optarg; 110 break; 111 case 'i': /* log process id also */ 112 logflags |= LOG_PID; 113 break; 114 case 'p': /* priority */ 115 pri = pencode(optarg); 116 break; 117 case 's': /* log to standard error */ 118 logflags |= LOG_PERROR; 119 break; 120 case 't': /* tag */ 121 tag = optarg; 122 break; 123 case '?': 124 default: 125 usage(); 126 } 127 argc -= optind; 128 argv += optind; 129 130 /* setup for logging */ 131 openlog(tag ? tag : getlogin(), logflags, 0); 132 (void) fclose(stdout); 133 134 /* log input line if appropriate */ 135 if (argc > 0) { 136 register char *p, *endp; 137 int len; 138 139 for (p = buf, endp = buf + sizeof(buf) - 2; *argv;) { 140 len = strlen(*argv); 141 if (p + len > endp && p > buf) { 142 logmessage(pri, host, buf); 143 p = buf; 144 } 145 if (len > sizeof(buf) - 1) 146 logmessage(pri, host, *argv++); 147 else { 148 if (p != buf) 149 *p++ = ' '; 150 bcopy(*argv++, p, len); 151 *(p += len) = '\0'; 152 } 153 } 154 if (p != buf) 155 logmessage(pri, host, buf); 156 } else 157 while (fgets(buf, sizeof(buf), stdin) != NULL) 158 logmessage(pri, host, buf); 159 exit(0); 160 } 161 162 /* 163 * Send the message to syslog, either on the local host, or on a remote host 164 */ 165 void 166 logmessage(int pri, char *host, char *buf) 167 { 168 static struct socks *socks; 169 static int nsock = 0; 170 struct addrinfo hints, *res, *r; 171 char *line; 172 int maxs, len, sock, error, i, lsent; 173 174 if (host == NULL) { 175 syslog(pri, "%s", buf); 176 return; 177 } 178 179 if (nsock <= 0) { /* set up socket stuff */ 180 /* resolve hostname */ 181 memset(&hints, 0, sizeof(hints)); 182 hints.ai_family = family; 183 hints.ai_socktype = SOCK_DGRAM; 184 error = getaddrinfo(host, "syslog", &hints, &res); 185 if (error == EAI_SERVICE) { 186 warnx ("syslog/udp: unknown service"); /* not fatal */ 187 error = getaddrinfo(host, "514", &hints, &res); 188 } 189 if (error) 190 errx(1, "%s: %s", gai_strerror(error), host); 191 /* count max number of sockets we may open */ 192 for (maxs = 0, r = res; r; r = r->ai_next, maxs++); 193 socks = malloc(maxs * sizeof(struct socks)); 194 if (!socks) 195 errx(1, "couldn't allocate memory for sockets"); 196 for (r = res; r; r = r->ai_next) { 197 sock = socket(r->ai_family, r->ai_socktype, 198 r->ai_protocol); 199 if (sock < 0) 200 continue; 201 memcpy(&socks[nsock].addr, r->ai_addr, r->ai_addrlen); 202 socks[nsock].addrlen = r->ai_addrlen; 203 socks[nsock++].sock = sock; 204 } 205 freeaddrinfo(res); 206 if (nsock <= 0) 207 errx(1, "socket"); 208 } 209 210 if ((len = asprintf(&line, "<%d>%s", pri, buf)) == -1) 211 errx(1, "asprintf"); 212 213 for (i = 0; i < nsock; ++i) { 214 lsent = sendto(socks[i].sock, line, len, 0, 215 (struct sockaddr *)&socks[i].addr, 216 socks[i].addrlen); 217 if (lsent == len && !send_to_all) 218 break; 219 } 220 if (lsent != len) 221 warnx ("sendmsg"); 222 223 free(line); 224 } 225 226 /* 227 * Decode a symbolic name to a numeric value 228 */ 229 int 230 pencode(s) 231 register char *s; 232 { 233 char *save; 234 int fac, lev; 235 236 for (save = s; *s && *s != '.'; ++s); 237 if (*s) { 238 *s = '\0'; 239 fac = decode(save, facilitynames); 240 if (fac < 0) 241 errx(1, "unknown facility name: %s", save); 242 *s++ = '.'; 243 } 244 else { 245 fac = 0; 246 s = save; 247 } 248 lev = decode(s, prioritynames); 249 if (lev < 0) 250 errx(1, "unknown priority name: %s", save); 251 return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK)); 252 } 253 254 int 255 decode(name, codetab) 256 char *name; 257 CODE *codetab; 258 { 259 register CODE *c; 260 261 if (isdigit(*name)) 262 return (atoi(name)); 263 264 for (c = codetab; c->c_name; c++) 265 if (!strcasecmp(name, c->c_name)) 266 return (c->c_val); 267 268 return (-1); 269 } 270 271 static void 272 usage() 273 { 274 (void)fprintf(stderr, "usage: %s\n", 275 "logger [-46Ais] [-f file] [-h host] [-p pri] [-t tag] [message ...]" 276 ); 277 exit(1); 278 } 279