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 34 #ifndef lint 35 static const char copyright[] = 36 "@(#) Copyright (c) 1983, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #if 0 41 #ifndef lint 42 static char sccsid[] = "@(#)logger.c 8.1 (Berkeley) 6/6/93"; 43 #endif /* not lint */ 44 #endif 45 46 #include <sys/cdefs.h> 47 __FBSDID("$FreeBSD$"); 48 49 #include <sys/types.h> 50 #include <sys/socket.h> 51 #include <netinet/in.h> 52 53 #include <ctype.h> 54 #include <err.h> 55 #include <netdb.h> 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include <unistd.h> 60 61 #define SYSLOG_NAMES 62 #include <syslog.h> 63 64 int decode(char *, CODE *); 65 int pencode(char *); 66 static void logmessage(int, char *, char *, char *); 67 static void usage(void); 68 69 struct socks { 70 int sock; 71 int addrlen; 72 struct sockaddr_storage addr; 73 }; 74 75 #ifdef INET6 76 int family = PF_UNSPEC; /* protocol family (IPv4, IPv6 or both) */ 77 #else 78 int family = PF_INET; /* protocol family (IPv4 only) */ 79 #endif 80 int send_to_all = 0; /* send message to all IPv4/IPv6 addresses */ 81 82 /* 83 * logger -- read and log utility 84 * 85 * Reads from an input and arranges to write the result on the system 86 * log. 87 */ 88 int 89 main(int argc, char *argv[]) 90 { 91 int ch, logflags, pri; 92 char *tag, *host, *svcname, buf[1024]; 93 94 tag = NULL; 95 host = NULL; 96 svcname = "syslog"; 97 pri = LOG_USER | LOG_NOTICE; 98 logflags = 0; 99 unsetenv("TZ"); 100 while ((ch = getopt(argc, argv, "46Af:h:iP:p:st:")) != -1) 101 switch((char)ch) { 102 case '4': 103 family = PF_INET; 104 break; 105 #ifdef INET6 106 case '6': 107 family = PF_INET6; 108 break; 109 #endif 110 case 'A': 111 send_to_all++; 112 break; 113 case 'f': /* file to log */ 114 if (freopen(optarg, "r", stdin) == NULL) 115 err(1, "%s", optarg); 116 break; 117 case 'h': /* hostname to deliver to */ 118 host = optarg; 119 break; 120 case 'i': /* log process id also */ 121 logflags |= LOG_PID; 122 break; 123 case 'P': /* service name or port number */ 124 svcname = optarg; 125 break; 126 case 'p': /* priority */ 127 pri = pencode(optarg); 128 break; 129 case 's': /* log to standard error */ 130 logflags |= LOG_PERROR; 131 break; 132 case 't': /* tag */ 133 tag = optarg; 134 break; 135 case '?': 136 default: 137 usage(); 138 } 139 argc -= optind; 140 argv += optind; 141 142 /* setup for logging */ 143 openlog(tag ? tag : getlogin(), logflags, 0); 144 (void) fclose(stdout); 145 146 /* log input line if appropriate */ 147 if (argc > 0) { 148 char *p, *endp; 149 size_t len; 150 151 for (p = buf, endp = buf + sizeof(buf) - 2; *argv;) { 152 len = strlen(*argv); 153 if (p + len > endp && p > buf) { 154 logmessage(pri, host, svcname, buf); 155 p = buf; 156 } 157 if (len > sizeof(buf) - 1) 158 logmessage(pri, host, svcname, *argv++); 159 else { 160 if (p != buf) 161 *p++ = ' '; 162 bcopy(*argv++, p, len); 163 *(p += len) = '\0'; 164 } 165 } 166 if (p != buf) 167 logmessage(pri, host, svcname, buf); 168 } else 169 while (fgets(buf, sizeof(buf), stdin) != NULL) 170 logmessage(pri, host, svcname, buf); 171 exit(0); 172 } 173 174 /* 175 * Send the message to syslog, either on the local host, or on a remote host 176 */ 177 void 178 logmessage(int pri, char *host, char *svcname, char *buf) 179 { 180 static struct socks *socks; 181 static int nsock = 0; 182 struct addrinfo hints, *res, *r; 183 char *line; 184 int maxs, len, sock, error, i, lsent; 185 186 if (host == NULL) { 187 syslog(pri, "%s", buf); 188 return; 189 } 190 191 if (nsock <= 0) { /* set up socket stuff */ 192 /* resolve hostname */ 193 memset(&hints, 0, sizeof(hints)); 194 hints.ai_family = family; 195 hints.ai_socktype = SOCK_DGRAM; 196 error = getaddrinfo(host, svcname, &hints, &res); 197 if (error == EAI_SERVICE) { 198 warnx("%s/udp: unknown service", svcname); 199 error = getaddrinfo(host, "514", &hints, &res); 200 } 201 if (error) 202 errx(1, "%s: %s", gai_strerror(error), host); 203 /* count max number of sockets we may open */ 204 for (maxs = 0, r = res; r; r = r->ai_next, maxs++); 205 socks = malloc(maxs * sizeof(struct socks)); 206 if (!socks) 207 errx(1, "couldn't allocate memory for sockets"); 208 for (r = res; r; r = r->ai_next) { 209 sock = socket(r->ai_family, r->ai_socktype, 210 r->ai_protocol); 211 if (sock < 0) 212 continue; 213 memcpy(&socks[nsock].addr, r->ai_addr, r->ai_addrlen); 214 socks[nsock].addrlen = r->ai_addrlen; 215 socks[nsock++].sock = sock; 216 } 217 freeaddrinfo(res); 218 if (nsock <= 0) 219 errx(1, "socket"); 220 } 221 222 if ((len = asprintf(&line, "<%d>%s", pri, buf)) == -1) 223 errx(1, "asprintf"); 224 225 lsent = -1; 226 for (i = 0; i < nsock; ++i) { 227 lsent = sendto(socks[i].sock, line, len, 0, 228 (struct sockaddr *)&socks[i].addr, 229 socks[i].addrlen); 230 if (lsent == len && !send_to_all) 231 break; 232 } 233 if (lsent != len) { 234 if (lsent == -1) 235 warn ("sendto"); 236 else 237 warnx ("sendto: short send - %d bytes", lsent); 238 } 239 240 free(line); 241 } 242 243 /* 244 * Decode a symbolic name to a numeric value 245 */ 246 int 247 pencode(char *s) 248 { 249 char *save; 250 int fac, lev; 251 252 for (save = s; *s && *s != '.'; ++s); 253 if (*s) { 254 *s = '\0'; 255 fac = decode(save, facilitynames); 256 if (fac < 0) 257 errx(1, "unknown facility name: %s", save); 258 *s++ = '.'; 259 } 260 else { 261 fac = 0; 262 s = save; 263 } 264 lev = decode(s, prioritynames); 265 if (lev < 0) 266 errx(1, "unknown priority name: %s", save); 267 return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK)); 268 } 269 270 int 271 decode(char *name, CODE *codetab) 272 { 273 CODE *c; 274 275 if (isdigit(*name)) 276 return (atoi(name)); 277 278 for (c = codetab; c->c_name; c++) 279 if (!strcasecmp(name, c->c_name)) 280 return (c->c_val); 281 282 return (-1); 283 } 284 285 static void 286 usage(void) 287 { 288 (void)fprintf(stderr, "usage: %s\n", 289 "logger [-46Ais] [-f file] [-h host] [-P port] [-p pri] [-t tag]\n" 290 " [message ...]" 291 ); 292 exit(1); 293 } 294