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