1 /* $NetBSD: log.c,v 1.1.1.1 2011/04/13 18:15:35 elric Exp $ */ 2 3 /* 4 * Copyright (c) 1997-2006 Kungliga Tekniska Högskolan 5 * (Royal Institute of Technology, Stockholm, Sweden). 6 * All rights reserved. 7 * 8 * Portions Copyright (c) 2009 Apple Inc. All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 21 * 3. Neither the name of the Institute nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 38 #include "krb5_locl.h" 39 #include <vis.h> 40 41 struct facility { 42 int min; 43 int max; 44 krb5_log_log_func_t log_func; 45 krb5_log_close_func_t close_func; 46 void *data; 47 }; 48 49 static struct facility* 50 log_realloc(krb5_log_facility *f) 51 { 52 struct facility *fp; 53 fp = realloc(f->val, (f->len + 1) * sizeof(*f->val)); 54 if(fp == NULL) 55 return NULL; 56 f->len++; 57 f->val = fp; 58 fp += f->len - 1; 59 return fp; 60 } 61 62 struct s2i { 63 const char *s; 64 int val; 65 }; 66 67 #define L(X) { #X, LOG_ ## X } 68 69 static struct s2i syslogvals[] = { 70 L(EMERG), 71 L(ALERT), 72 L(CRIT), 73 L(ERR), 74 L(WARNING), 75 L(NOTICE), 76 L(INFO), 77 L(DEBUG), 78 79 L(AUTH), 80 #ifdef LOG_AUTHPRIV 81 L(AUTHPRIV), 82 #endif 83 #ifdef LOG_CRON 84 L(CRON), 85 #endif 86 L(DAEMON), 87 #ifdef LOG_FTP 88 L(FTP), 89 #endif 90 L(KERN), 91 L(LPR), 92 L(MAIL), 93 #ifdef LOG_NEWS 94 L(NEWS), 95 #endif 96 L(SYSLOG), 97 L(USER), 98 #ifdef LOG_UUCP 99 L(UUCP), 100 #endif 101 L(LOCAL0), 102 L(LOCAL1), 103 L(LOCAL2), 104 L(LOCAL3), 105 L(LOCAL4), 106 L(LOCAL5), 107 L(LOCAL6), 108 L(LOCAL7), 109 { NULL, -1 } 110 }; 111 112 static int 113 find_value(const char *s, struct s2i *table) 114 { 115 while(table->s && strcasecmp(table->s, s)) 116 table++; 117 return table->val; 118 } 119 120 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 121 krb5_initlog(krb5_context context, 122 const char *program, 123 krb5_log_facility **fac) 124 { 125 krb5_log_facility *f = calloc(1, sizeof(*f)); 126 if(f == NULL) { 127 krb5_set_error_message(context, ENOMEM, 128 N_("malloc: out of memory", "")); 129 return ENOMEM; 130 } 131 f->program = strdup(program); 132 if(f->program == NULL){ 133 free(f); 134 krb5_set_error_message(context, ENOMEM, 135 N_("malloc: out of memory", "")); 136 return ENOMEM; 137 } 138 *fac = f; 139 return 0; 140 } 141 142 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 143 krb5_addlog_func(krb5_context context, 144 krb5_log_facility *fac, 145 int min, 146 int max, 147 krb5_log_log_func_t log_func, 148 krb5_log_close_func_t close_func, 149 void *data) 150 { 151 struct facility *fp = log_realloc(fac); 152 if(fp == NULL) { 153 krb5_set_error_message(context, ENOMEM, 154 N_("malloc: out of memory", "")); 155 return ENOMEM; 156 } 157 fp->min = min; 158 fp->max = max; 159 fp->log_func = log_func; 160 fp->close_func = close_func; 161 fp->data = data; 162 return 0; 163 } 164 165 166 struct _heimdal_syslog_data{ 167 int priority; 168 }; 169 170 static void KRB5_CALLCONV 171 log_syslog(const char *timestr, 172 const char *msg, 173 void *data) 174 175 { 176 struct _heimdal_syslog_data *s = data; 177 syslog(s->priority, "%s", msg); 178 } 179 180 static void KRB5_CALLCONV 181 close_syslog(void *data) 182 { 183 free(data); 184 closelog(); 185 } 186 187 static krb5_error_code 188 open_syslog(krb5_context context, 189 krb5_log_facility *facility, int min, int max, 190 const char *sev, const char *fac) 191 { 192 struct _heimdal_syslog_data *sd = malloc(sizeof(*sd)); 193 int i; 194 195 if(sd == NULL) { 196 krb5_set_error_message(context, ENOMEM, 197 N_("malloc: out of memory", "")); 198 return ENOMEM; 199 } 200 i = find_value(sev, syslogvals); 201 if(i == -1) 202 i = LOG_ERR; 203 sd->priority = i; 204 i = find_value(fac, syslogvals); 205 if(i == -1) 206 i = LOG_AUTH; 207 sd->priority |= i; 208 roken_openlog(facility->program, LOG_PID | LOG_NDELAY, i); 209 return krb5_addlog_func(context, facility, min, max, 210 log_syslog, close_syslog, sd); 211 } 212 213 struct file_data{ 214 const char *filename; 215 const char *mode; 216 FILE *fd; 217 int keep_open; 218 }; 219 220 static void KRB5_CALLCONV 221 log_file(const char *timestr, 222 const char *msg, 223 void *data) 224 { 225 struct file_data *f = data; 226 char *msgclean; 227 size_t len = strlen(msg); 228 if(f->keep_open == 0) 229 f->fd = fopen(f->filename, f->mode); 230 if(f->fd == NULL) 231 return; 232 /* make sure the log doesn't contain special chars */ 233 msgclean = malloc((len + 1) * 4); 234 if (msgclean == NULL) 235 goto out; 236 strvisx(msgclean, rk_UNCONST(msg), len, VIS_OCTAL); 237 fprintf(f->fd, "%s %s\n", timestr, msgclean); 238 free(msgclean); 239 out: 240 if(f->keep_open == 0) { 241 fclose(f->fd); 242 f->fd = NULL; 243 } 244 } 245 246 static void KRB5_CALLCONV 247 close_file(void *data) 248 { 249 struct file_data *f = data; 250 if(f->keep_open && f->filename) 251 fclose(f->fd); 252 free(data); 253 } 254 255 static krb5_error_code 256 open_file(krb5_context context, krb5_log_facility *fac, int min, int max, 257 const char *filename, const char *mode, FILE *f, int keep_open) 258 { 259 struct file_data *fd = malloc(sizeof(*fd)); 260 if(fd == NULL) { 261 krb5_set_error_message(context, ENOMEM, 262 N_("malloc: out of memory", "")); 263 return ENOMEM; 264 } 265 fd->filename = filename; 266 fd->mode = mode; 267 fd->fd = f; 268 fd->keep_open = keep_open; 269 270 return krb5_addlog_func(context, fac, min, max, log_file, close_file, fd); 271 } 272 273 274 275 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 276 krb5_addlog_dest(krb5_context context, krb5_log_facility *f, const char *orig) 277 { 278 krb5_error_code ret = 0; 279 int min = 0, max = -1, n; 280 char c; 281 const char *p = orig; 282 283 n = sscanf(p, "%d%c%d/", &min, &c, &max); 284 if(n == 2){ 285 if(c == '/') { 286 if(min < 0){ 287 max = -min; 288 min = 0; 289 }else{ 290 max = min; 291 } 292 } 293 } 294 if(n){ 295 p = strchr(p, '/'); 296 if(p == NULL) { 297 krb5_set_error_message(context, HEIM_ERR_LOG_PARSE, 298 N_("failed to parse \"%s\"", ""), orig); 299 return HEIM_ERR_LOG_PARSE; 300 } 301 p++; 302 } 303 if(strcmp(p, "STDERR") == 0){ 304 ret = open_file(context, f, min, max, NULL, NULL, stderr, 1); 305 }else if(strcmp(p, "CONSOLE") == 0){ 306 ret = open_file(context, f, min, max, "/dev/console", "w", NULL, 0); 307 }else if(strncmp(p, "FILE", 4) == 0 && (p[4] == ':' || p[4] == '=')){ 308 char *fn; 309 FILE *file = NULL; 310 int keep_open = 0; 311 fn = strdup(p + 5); 312 if(fn == NULL) { 313 krb5_set_error_message(context, ENOMEM, 314 N_("malloc: out of memory", "")); 315 return ENOMEM; 316 } 317 if(p[4] == '='){ 318 int i = open(fn, O_WRONLY | O_CREAT | 319 O_TRUNC | O_APPEND, 0666); 320 if(i < 0) { 321 ret = errno; 322 krb5_set_error_message(context, ret, 323 N_("open(%s) logile: %s", ""), fn, 324 strerror(ret)); 325 free(fn); 326 return ret; 327 } 328 rk_cloexec(i); 329 file = fdopen(i, "a"); 330 if(file == NULL){ 331 ret = errno; 332 close(i); 333 krb5_set_error_message(context, ret, 334 N_("fdopen(%s) logfile: %s", ""), 335 fn, strerror(ret)); 336 free(fn); 337 return ret; 338 } 339 keep_open = 1; 340 } 341 ret = open_file(context, f, min, max, fn, "a", file, keep_open); 342 }else if(strncmp(p, "DEVICE", 6) == 0 && (p[6] == ':' || p[6] == '=')){ 343 ret = open_file(context, f, min, max, strdup(p + 7), "w", NULL, 0); 344 }else if(strncmp(p, "SYSLOG", 6) == 0 && (p[6] == '\0' || p[6] == ':')){ 345 char severity[128] = ""; 346 char facility[128] = ""; 347 p += 6; 348 if(*p != '\0') 349 p++; 350 if(strsep_copy(&p, ":", severity, sizeof(severity)) != -1) 351 strsep_copy(&p, ":", facility, sizeof(facility)); 352 if(*severity == '\0') 353 strlcpy(severity, "ERR", sizeof(severity)); 354 if(*facility == '\0') 355 strlcpy(facility, "AUTH", sizeof(facility)); 356 ret = open_syslog(context, f, min, max, severity, facility); 357 }else{ 358 ret = HEIM_ERR_LOG_PARSE; /* XXX */ 359 krb5_set_error_message (context, ret, 360 N_("unknown log type: %s", ""), p); 361 } 362 return ret; 363 } 364 365 366 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 367 krb5_openlog(krb5_context context, 368 const char *program, 369 krb5_log_facility **fac) 370 { 371 krb5_error_code ret; 372 char **p, **q; 373 374 ret = krb5_initlog(context, program, fac); 375 if(ret) 376 return ret; 377 378 p = krb5_config_get_strings(context, NULL, "logging", program, NULL); 379 if(p == NULL) 380 p = krb5_config_get_strings(context, NULL, "logging", "default", NULL); 381 if(p){ 382 for(q = p; *q && ret == 0; q++) 383 ret = krb5_addlog_dest(context, *fac, *q); 384 krb5_config_free_strings(p); 385 }else 386 ret = krb5_addlog_dest(context, *fac, "SYSLOG"); 387 return ret; 388 } 389 390 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 391 krb5_closelog(krb5_context context, 392 krb5_log_facility *fac) 393 { 394 int i; 395 for(i = 0; i < fac->len; i++) 396 (*fac->val[i].close_func)(fac->val[i].data); 397 free(fac->val); 398 free(fac->program); 399 fac->val = NULL; 400 fac->len = 0; 401 fac->program = NULL; 402 free(fac); 403 return 0; 404 } 405 406 #undef __attribute__ 407 #define __attribute__(X) 408 409 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 410 krb5_vlog_msg(krb5_context context, 411 krb5_log_facility *fac, 412 char **reply, 413 int level, 414 const char *fmt, 415 va_list ap) 416 __attribute__((format (printf, 5, 0))) 417 { 418 419 char *msg = NULL; 420 const char *actual = NULL; 421 char buf[64]; 422 time_t t = 0; 423 int i; 424 425 for(i = 0; fac && i < fac->len; i++) 426 if(fac->val[i].min <= level && 427 (fac->val[i].max < 0 || fac->val[i].max >= level)) { 428 if(t == 0) { 429 t = time(NULL); 430 krb5_format_time(context, t, buf, sizeof(buf), TRUE); 431 } 432 if(actual == NULL) { 433 int ret = vasprintf(&msg, fmt, ap); 434 if(ret < 0 || msg == NULL) 435 actual = fmt; 436 else 437 actual = msg; 438 } 439 (*fac->val[i].log_func)(buf, actual, fac->val[i].data); 440 } 441 if(reply == NULL) 442 free(msg); 443 else 444 *reply = msg; 445 return 0; 446 } 447 448 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 449 krb5_vlog(krb5_context context, 450 krb5_log_facility *fac, 451 int level, 452 const char *fmt, 453 va_list ap) 454 __attribute__((format (printf, 4, 0))) 455 { 456 return krb5_vlog_msg(context, fac, NULL, level, fmt, ap); 457 } 458 459 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 460 krb5_log_msg(krb5_context context, 461 krb5_log_facility *fac, 462 int level, 463 char **reply, 464 const char *fmt, 465 ...) 466 __attribute__((format (printf, 5, 6))) 467 { 468 va_list ap; 469 krb5_error_code ret; 470 471 va_start(ap, fmt); 472 ret = krb5_vlog_msg(context, fac, reply, level, fmt, ap); 473 va_end(ap); 474 return ret; 475 } 476 477 478 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 479 krb5_log(krb5_context context, 480 krb5_log_facility *fac, 481 int level, 482 const char *fmt, 483 ...) 484 __attribute__((format (printf, 4, 5))) 485 { 486 va_list ap; 487 krb5_error_code ret; 488 489 va_start(ap, fmt); 490 ret = krb5_vlog(context, fac, level, fmt, ap); 491 va_end(ap); 492 return ret; 493 } 494 495 void KRB5_LIB_FUNCTION 496 _krb5_debug(krb5_context context, 497 int level, 498 const char *fmt, 499 ...) 500 __attribute__((format (printf, 3, 4))) 501 { 502 va_list ap; 503 504 if (context == NULL || context->debug_dest == NULL) 505 return; 506 507 va_start(ap, fmt); 508 krb5_vlog(context, context->debug_dest, level, fmt, ap); 509 va_end(ap); 510 } 511 512 krb5_boolean KRB5_LIB_FUNCTION 513 _krb5_have_debug(krb5_context context, int level) 514 { 515 if (context == NULL || context->debug_dest == NULL) 516 return 0 ; 517 return 1; 518 } 519