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, const char *, const char *, const 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, buf[1024]; 93 const char *svcname; 94 95 tag = NULL; 96 host = NULL; 97 svcname = "syslog"; 98 pri = LOG_USER | LOG_NOTICE; 99 logflags = 0; 100 unsetenv("TZ"); 101 while ((ch = getopt(argc, argv, "46Af:h:iP:p:st:")) != -1) 102 switch((char)ch) { 103 case '4': 104 family = PF_INET; 105 break; 106 #ifdef INET6 107 case '6': 108 family = PF_INET6; 109 break; 110 #endif 111 case 'A': 112 send_to_all++; 113 break; 114 case 'f': /* file to log */ 115 if (freopen(optarg, "r", stdin) == NULL) 116 err(1, "%s", optarg); 117 setvbuf(stdin, 0, _IONBF, 0); 118 break; 119 case 'h': /* hostname to deliver to */ 120 host = optarg; 121 break; 122 case 'i': /* log process id also */ 123 logflags |= LOG_PID; 124 break; 125 case 'P': /* service name or port number */ 126 svcname = optarg; 127 break; 128 case 'p': /* priority */ 129 pri = pencode(optarg); 130 break; 131 case 's': /* log to standard error */ 132 logflags |= LOG_PERROR; 133 break; 134 case 't': /* tag */ 135 tag = optarg; 136 break; 137 case '?': 138 default: 139 usage(); 140 } 141 argc -= optind; 142 argv += optind; 143 144 /* setup for logging */ 145 openlog(tag ? tag : getlogin(), logflags, 0); 146 (void) fclose(stdout); 147 148 /* log input line if appropriate */ 149 if (argc > 0) { 150 char *p, *endp; 151 size_t len; 152 153 for (p = buf, endp = buf + sizeof(buf) - 2; *argv;) { 154 len = strlen(*argv); 155 if (p + len > endp && p > buf) { 156 logmessage(pri, host, svcname, buf); 157 p = buf; 158 } 159 if (len > sizeof(buf) - 1) 160 logmessage(pri, host, svcname, *argv++); 161 else { 162 if (p != buf) 163 *p++ = ' '; 164 bcopy(*argv++, p, len); 165 *(p += len) = '\0'; 166 } 167 } 168 if (p != buf) 169 logmessage(pri, host, svcname, buf); 170 } else 171 while (fgets(buf, sizeof(buf), stdin) != NULL) 172 logmessage(pri, host, svcname, buf); 173 exit(0); 174 } 175 176 /* 177 * Send the message to syslog, either on the local host, or on a remote host 178 */ 179 void 180 logmessage(int pri, const char *host, const char *svcname, const char *buf) 181 { 182 static struct socks *socks; 183 static int nsock = 0; 184 struct addrinfo hints, *res, *r; 185 char *line; 186 int maxs, len, sock, error, i, lsent; 187 188 if (host == NULL) { 189 syslog(pri, "%s", buf); 190 return; 191 } 192 193 if (nsock <= 0) { /* set up socket stuff */ 194 /* resolve hostname */ 195 memset(&hints, 0, sizeof(hints)); 196 hints.ai_family = family; 197 hints.ai_socktype = SOCK_DGRAM; 198 error = getaddrinfo(host, svcname, &hints, &res); 199 if (error == EAI_SERVICE) { 200 warnx("%s/udp: unknown service", svcname); 201 error = getaddrinfo(host, "514", &hints, &res); 202 } 203 if (error) 204 errx(1, "%s: %s", gai_strerror(error), host); 205 /* count max number of sockets we may open */ 206 for (maxs = 0, r = res; r; r = r->ai_next, maxs++); 207 socks = malloc(maxs * sizeof(struct socks)); 208 if (!socks) 209 errx(1, "couldn't allocate memory for sockets"); 210 for (r = res; r; r = r->ai_next) { 211 sock = socket(r->ai_family, r->ai_socktype, 212 r->ai_protocol); 213 if (sock < 0) 214 continue; 215 memcpy(&socks[nsock].addr, r->ai_addr, r->ai_addrlen); 216 socks[nsock].addrlen = r->ai_addrlen; 217 socks[nsock++].sock = sock; 218 } 219 freeaddrinfo(res); 220 if (nsock <= 0) 221 errx(1, "socket"); 222 } 223 224 if ((len = asprintf(&line, "<%d>%s", pri, buf)) == -1) 225 errx(1, "asprintf"); 226 227 lsent = -1; 228 for (i = 0; i < nsock; ++i) { 229 lsent = sendto(socks[i].sock, line, len, 0, 230 (struct sockaddr *)&socks[i].addr, 231 socks[i].addrlen); 232 if (lsent == len && !send_to_all) 233 break; 234 } 235 if (lsent != len) { 236 if (lsent == -1) 237 warn ("sendto"); 238 else 239 warnx ("sendto: short send - %d bytes", lsent); 240 } 241 242 free(line); 243 } 244 245 /* 246 * Decode a symbolic name to a numeric value 247 */ 248 int 249 pencode(char *s) 250 { 251 char *save; 252 int fac, lev; 253 254 for (save = s; *s && *s != '.'; ++s); 255 if (*s) { 256 *s = '\0'; 257 fac = decode(save, facilitynames); 258 if (fac < 0) 259 errx(1, "unknown facility name: %s", save); 260 *s++ = '.'; 261 } 262 else { 263 fac = 0; 264 s = save; 265 } 266 lev = decode(s, prioritynames); 267 if (lev < 0) 268 errx(1, "unknown priority name: %s", save); 269 return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK)); 270 } 271 272 int 273 decode(char *name, CODE *codetab) 274 { 275 CODE *c; 276 277 if (isdigit(*name)) 278 return (atoi(name)); 279 280 for (c = codetab; c->c_name; c++) 281 if (!strcasecmp(name, c->c_name)) 282 return (c->c_val); 283 284 return (-1); 285 } 286 287 static void 288 usage(void) 289 { 290 (void)fprintf(stderr, "usage: %s\n", 291 "logger [-46Ais] [-f file] [-h host] [-P port] [-p pri] [-t tag]\n" 292 " [message ...]" 293 ); 294 exit(1); 295 } 296