root/source4/heimdal/lib/krb5/log.c

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DEFINITIONS

This source file includes following definitions.
  1. log_realloc
  2. find_value
  3. krb5_initlog
  4. krb5_addlog_func
  5. log_syslog
  6. close_syslog
  7. open_syslog
  8. log_file
  9. close_file
  10. open_file
  11. krb5_addlog_dest
  12. krb5_openlog
  13. krb5_closelog
  14. krb5_vlog_msg
  15. krb5_vlog
  16. krb5_log_msg
  17. krb5_log

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

/* [<][>][^][v][top][bottom][index][help] */