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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef lint 31 static const char copyright[] = 32 "@(#) Copyright (c) 1983, 1993\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34 #endif /* not lint */ 35 36 #if 0 37 #ifndef lint 38 static char sccsid[] = "@(#)logger.c 8.1 (Berkeley) 6/6/93"; 39 #endif /* not lint */ 40 #endif 41 42 #include <sys/cdefs.h> 43 __FBSDID("$FreeBSD$"); 44 45 #include <sys/types.h> 46 #include <sys/socket.h> 47 #include <netinet/in.h> 48 49 #include <ctype.h> 50 #include <err.h> 51 #include <netdb.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include <unistd.h> 56 57 #define SYSLOG_NAMES 58 #include <syslog.h> 59 60 static int decode(char *, const CODE *); 61 static int pencode(char *); 62 static void logmessage(int, const char *, const char *, const char *, 63 const char *); 64 static void usage(void); 65 66 struct socks { 67 int sock; 68 int addrlen; 69 struct sockaddr_storage addr; 70 }; 71 72 #ifdef INET6 73 static int family = PF_UNSPEC; /* protocol family (IPv4, IPv6 or both) */ 74 #else 75 static int family = PF_INET; /* protocol family (IPv4 only) */ 76 #endif 77 static int send_to_all = 0; /* send message to all IPv4/IPv6 addresses */ 78 79 /* 80 * logger -- read and log utility 81 * 82 * Reads from an input and arranges to write the result on the system 83 * log. 84 */ 85 int 86 main(int argc, char *argv[]) 87 { 88 int ch, logflags, pri; 89 char *tag, *host, buf[1024]; 90 const char *svcname; 91 92 tag = NULL; 93 host = NULL; 94 svcname = "syslog"; 95 pri = LOG_USER | LOG_NOTICE; 96 logflags = 0; 97 unsetenv("TZ"); 98 while ((ch = getopt(argc, argv, "46Af:h:iP:p:st:")) != -1) 99 switch((char)ch) { 100 case '4': 101 family = PF_INET; 102 break; 103 #ifdef INET6 104 case '6': 105 family = PF_INET6; 106 break; 107 #endif 108 case 'A': 109 send_to_all++; 110 break; 111 case 'f': /* file to log */ 112 if (freopen(optarg, "r", stdin) == NULL) 113 err(1, "%s", optarg); 114 setvbuf(stdin, 0, _IONBF, 0); 115 break; 116 case 'h': /* hostname to deliver to */ 117 host = optarg; 118 break; 119 case 'i': /* log process id also */ 120 logflags |= LOG_PID; 121 break; 122 case 'P': /* service name or port number */ 123 svcname = optarg; 124 break; 125 case 'p': /* priority */ 126 pri = pencode(optarg); 127 break; 128 case 's': /* log to standard error */ 129 logflags |= LOG_PERROR; 130 break; 131 case 't': /* tag */ 132 tag = optarg; 133 break; 134 case '?': 135 default: 136 usage(); 137 } 138 argc -= optind; 139 argv += optind; 140 141 if (tag == NULL) 142 tag = getlogin(); 143 /* setup for logging */ 144 if (host == NULL) 145 openlog(tag, 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, tag, host, svcname, buf); 157 p = buf; 158 } 159 if (len > sizeof(buf) - 1) 160 logmessage(pri, tag, 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, tag, host, svcname, buf); 170 } else 171 while (fgets(buf, sizeof(buf), stdin) != NULL) 172 logmessage(pri, tag, 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 static void 180 logmessage(int pri, const char *tag, const char *host, const char *svcname, 181 const char *buf) 182 { 183 static struct socks *socks; 184 static int nsock = 0; 185 struct addrinfo hints, *res, *r; 186 char *line; 187 int maxs, len, sock, error, i, lsent; 188 189 if (host == NULL) { 190 syslog(pri, "%s", buf); 191 return; 192 } 193 194 if (nsock <= 0) { /* set up socket stuff */ 195 /* resolve hostname */ 196 memset(&hints, 0, sizeof(hints)); 197 hints.ai_family = family; 198 hints.ai_socktype = SOCK_DGRAM; 199 error = getaddrinfo(host, svcname, &hints, &res); 200 if (error == EAI_SERVICE) { 201 warnx("%s/udp: unknown service", svcname); 202 error = getaddrinfo(host, "514", &hints, &res); 203 } 204 if (error) 205 errx(1, "%s: %s", gai_strerror(error), host); 206 /* count max number of sockets we may open */ 207 for (maxs = 0, r = res; r; r = r->ai_next, maxs++); 208 socks = malloc(maxs * sizeof(struct socks)); 209 if (!socks) 210 errx(1, "couldn't allocate memory for sockets"); 211 for (r = res; r; r = r->ai_next) { 212 sock = socket(r->ai_family, r->ai_socktype, 213 r->ai_protocol); 214 if (sock < 0) 215 continue; 216 memcpy(&socks[nsock].addr, r->ai_addr, r->ai_addrlen); 217 socks[nsock].addrlen = r->ai_addrlen; 218 socks[nsock++].sock = sock; 219 } 220 freeaddrinfo(res); 221 if (nsock <= 0) 222 errx(1, "socket"); 223 } 224 225 if ((len = asprintf(&line, "<%d>%s: %s", pri, tag, buf)) == -1) 226 errx(1, "asprintf"); 227 228 lsent = -1; 229 for (i = 0; i < nsock; ++i) { 230 lsent = sendto(socks[i].sock, line, len, 0, 231 (struct sockaddr *)&socks[i].addr, 232 socks[i].addrlen); 233 if (lsent == len && !send_to_all) 234 break; 235 } 236 if (lsent != len) { 237 if (lsent == -1) 238 warn ("sendto"); 239 else 240 warnx ("sendto: short send - %d bytes", lsent); 241 } 242 243 free(line); 244 } 245 246 /* 247 * Decode a symbolic name to a numeric value 248 */ 249 static int 250 pencode(char *s) 251 { 252 char *save; 253 int fac, lev; 254 255 for (save = s; *s && *s != '.'; ++s); 256 if (*s) { 257 *s = '\0'; 258 fac = decode(save, facilitynames); 259 if (fac < 0) 260 errx(1, "unknown facility name: %s", save); 261 *s++ = '.'; 262 } 263 else { 264 fac = 0; 265 s = save; 266 } 267 lev = decode(s, prioritynames); 268 if (lev < 0) 269 errx(1, "unknown priority name: %s", save); 270 return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK)); 271 } 272 273 static int 274 decode(char *name, const CODE *codetab) 275 { 276 const CODE *c; 277 278 if (isdigit(*name)) 279 return (atoi(name)); 280 281 for (c = codetab; c->c_name; c++) 282 if (!strcasecmp(name, c->c_name)) 283 return (c->c_val); 284 285 return (-1); 286 } 287 288 static void 289 usage(void) 290 { 291 (void)fprintf(stderr, "usage: %s\n", 292 "logger [-46Ais] [-f file] [-h host] [-P port] [-p pri] [-t tag]\n" 293 " [message ...]" 294 ); 295 exit(1); 296 } 297