markus@openbsd.org | 5d14019 | 2018-07-27 12:03:17 +0000 | [diff] [blame^] | 1 | /* $OpenBSD: log.c,v 1.51 2018/07/27 12:03:17 markus Exp $ */ |
Damien Miller | 5ce662a | 1999-11-11 17:57:39 +1100 | [diff] [blame] | 2 | /* |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 3 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
| 4 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| 5 | * All rights reserved |
| 6 | * |
| 7 | * As far as I am concerned, the code I have written for this software |
| 8 | * can be used freely for any purpose. Any derived versions of this |
| 9 | * software must be clearly marked as such, and if the derived work is |
| 10 | * incompatible with the protocol description in the RFC file, it must be |
| 11 | * called by a name other than "ssh" or "Secure Shell". |
| 12 | */ |
| 13 | /* |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 14 | * Copyright (c) 2000 Markus Friedl. All rights reserved. |
| 15 | * |
| 16 | * Redistribution and use in source and binary forms, with or without |
| 17 | * modification, are permitted provided that the following conditions |
| 18 | * are met: |
| 19 | * 1. Redistributions of source code must retain the above copyright |
| 20 | * notice, this list of conditions and the following disclaimer. |
| 21 | * 2. Redistributions in binary form must reproduce the above copyright |
| 22 | * notice, this list of conditions and the following disclaimer in the |
| 23 | * documentation and/or other materials provided with the distribution. |
| 24 | * |
| 25 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 26 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 27 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 28 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 29 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 30 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 31 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 32 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 33 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 34 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 35 | */ |
Damien Miller | 5ce662a | 1999-11-11 17:57:39 +1100 | [diff] [blame] | 36 | |
| 37 | #include "includes.h" |
Damien Miller | 5ce662a | 1999-11-11 17:57:39 +1100 | [diff] [blame] | 38 | |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 39 | #include <sys/types.h> |
| 40 | |
Damien Miller | 03d4d7e | 2013-04-23 15:21:06 +1000 | [diff] [blame] | 41 | #include <fcntl.h> |
Darren Tucker | 5d19626 | 2006-07-12 22:15:16 +1000 | [diff] [blame] | 42 | #include <stdarg.h> |
Damien Miller | a7a73ee | 2006-08-05 11:37:59 +1000 | [diff] [blame] | 43 | #include <stdio.h> |
Damien Miller | e7a1e5c | 2006-08-05 11:34:19 +1000 | [diff] [blame] | 44 | #include <stdlib.h> |
Damien Miller | e3476ed | 2006-07-24 14:13:33 +1000 | [diff] [blame] | 45 | #include <string.h> |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 46 | #include <syslog.h> |
Damien Miller | e6b3b61 | 2006-07-24 14:01:23 +1000 | [diff] [blame] | 47 | #include <unistd.h> |
Darren Tucker | 36b7800 | 2007-05-20 15:08:15 +1000 | [diff] [blame] | 48 | #include <errno.h> |
Damien Miller | 63b4bcd | 2013-03-20 12:55:14 +1100 | [diff] [blame] | 49 | #if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H) && !defined(BROKEN_STRNVIS) |
Damien Miller | 5c3a558 | 2003-09-23 22:12:38 +1000 | [diff] [blame] | 50 | # include <vis.h> |
| 51 | #endif |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 52 | |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 53 | #include "log.h" |
Damien Miller | 194a1cb | 2006-07-10 21:09:22 +1000 | [diff] [blame] | 54 | |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 55 | static LogLevel log_level = SYSLOG_LEVEL_INFO; |
| 56 | static int log_on_stderr = 1; |
Damien Miller | 03d4d7e | 2013-04-23 15:21:06 +1000 | [diff] [blame] | 57 | static int log_stderr_fd = STDERR_FILENO; |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 58 | static int log_facility = LOG_AUTH; |
| 59 | static char *argv0; |
Damien Miller | 8f0bf23 | 2011-06-20 14:42:23 +1000 | [diff] [blame] | 60 | static log_handler_fn *log_handler; |
| 61 | static void *log_handler_ctx; |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 62 | |
| 63 | extern char *__progname; |
| 64 | |
Damien Miller | 23a7027 | 2004-07-21 10:52:13 +1000 | [diff] [blame] | 65 | #define LOG_SYSLOG_VIS (VIS_CSTYLE|VIS_NL|VIS_TAB|VIS_OCTAL) |
| 66 | #define LOG_STDERR_VIS (VIS_SAFE|VIS_OCTAL) |
| 67 | |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 68 | /* textual representation of log-facilities/levels */ |
| 69 | |
| 70 | static struct { |
| 71 | const char *name; |
| 72 | SyslogFacility val; |
| 73 | } log_facilities[] = { |
| 74 | { "DAEMON", SYSLOG_FACILITY_DAEMON }, |
| 75 | { "USER", SYSLOG_FACILITY_USER }, |
| 76 | { "AUTH", SYSLOG_FACILITY_AUTH }, |
Damien Miller | 30246a8 | 2001-03-05 21:23:31 +1100 | [diff] [blame] | 77 | #ifdef LOG_AUTHPRIV |
| 78 | { "AUTHPRIV", SYSLOG_FACILITY_AUTHPRIV }, |
| 79 | #endif |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 80 | { "LOCAL0", SYSLOG_FACILITY_LOCAL0 }, |
| 81 | { "LOCAL1", SYSLOG_FACILITY_LOCAL1 }, |
| 82 | { "LOCAL2", SYSLOG_FACILITY_LOCAL2 }, |
| 83 | { "LOCAL3", SYSLOG_FACILITY_LOCAL3 }, |
| 84 | { "LOCAL4", SYSLOG_FACILITY_LOCAL4 }, |
| 85 | { "LOCAL5", SYSLOG_FACILITY_LOCAL5 }, |
| 86 | { "LOCAL6", SYSLOG_FACILITY_LOCAL6 }, |
| 87 | { "LOCAL7", SYSLOG_FACILITY_LOCAL7 }, |
Damien Miller | fcd9320 | 2002-02-05 12:26:34 +1100 | [diff] [blame] | 88 | { NULL, SYSLOG_FACILITY_NOT_SET } |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 89 | }; |
| 90 | |
| 91 | static struct { |
| 92 | const char *name; |
| 93 | LogLevel val; |
| 94 | } log_levels[] = |
| 95 | { |
| 96 | { "QUIET", SYSLOG_LEVEL_QUIET }, |
| 97 | { "FATAL", SYSLOG_LEVEL_FATAL }, |
| 98 | { "ERROR", SYSLOG_LEVEL_ERROR }, |
| 99 | { "INFO", SYSLOG_LEVEL_INFO }, |
| 100 | { "VERBOSE", SYSLOG_LEVEL_VERBOSE }, |
| 101 | { "DEBUG", SYSLOG_LEVEL_DEBUG1 }, |
| 102 | { "DEBUG1", SYSLOG_LEVEL_DEBUG1 }, |
| 103 | { "DEBUG2", SYSLOG_LEVEL_DEBUG2 }, |
| 104 | { "DEBUG3", SYSLOG_LEVEL_DEBUG3 }, |
Damien Miller | fcd9320 | 2002-02-05 12:26:34 +1100 | [diff] [blame] | 105 | { NULL, SYSLOG_LEVEL_NOT_SET } |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 106 | }; |
| 107 | |
markus@openbsd.org | 5d14019 | 2018-07-27 12:03:17 +0000 | [diff] [blame^] | 108 | LogLevel |
| 109 | log_level_get(void) |
| 110 | { |
| 111 | return log_level; |
| 112 | } |
| 113 | |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 114 | SyslogFacility |
| 115 | log_facility_number(char *name) |
| 116 | { |
| 117 | int i; |
Ben Lindstrom | 8e8ef2a | 2002-07-07 22:14:55 +0000 | [diff] [blame] | 118 | |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 119 | if (name != NULL) |
| 120 | for (i = 0; log_facilities[i].name; i++) |
| 121 | if (strcasecmp(log_facilities[i].name, name) == 0) |
| 122 | return log_facilities[i].val; |
Damien Miller | fcd9320 | 2002-02-05 12:26:34 +1100 | [diff] [blame] | 123 | return SYSLOG_FACILITY_NOT_SET; |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 124 | } |
| 125 | |
Darren Tucker | e7140f2 | 2008-06-10 23:01:51 +1000 | [diff] [blame] | 126 | const char * |
| 127 | log_facility_name(SyslogFacility facility) |
| 128 | { |
| 129 | u_int i; |
| 130 | |
| 131 | for (i = 0; log_facilities[i].name; i++) |
| 132 | if (log_facilities[i].val == facility) |
| 133 | return log_facilities[i].name; |
| 134 | return NULL; |
| 135 | } |
| 136 | |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 137 | LogLevel |
| 138 | log_level_number(char *name) |
| 139 | { |
| 140 | int i; |
Ben Lindstrom | 8e8ef2a | 2002-07-07 22:14:55 +0000 | [diff] [blame] | 141 | |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 142 | if (name != NULL) |
| 143 | for (i = 0; log_levels[i].name; i++) |
| 144 | if (strcasecmp(log_levels[i].name, name) == 0) |
| 145 | return log_levels[i].val; |
Damien Miller | fcd9320 | 2002-02-05 12:26:34 +1100 | [diff] [blame] | 146 | return SYSLOG_LEVEL_NOT_SET; |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 147 | } |
Damien Miller | 5ce662a | 1999-11-11 17:57:39 +1100 | [diff] [blame] | 148 | |
Darren Tucker | e7140f2 | 2008-06-10 23:01:51 +1000 | [diff] [blame] | 149 | const char * |
| 150 | log_level_name(LogLevel level) |
| 151 | { |
| 152 | u_int i; |
| 153 | |
| 154 | for (i = 0; log_levels[i].name != NULL; i++) |
| 155 | if (log_levels[i].val == level) |
| 156 | return log_levels[i].name; |
| 157 | return NULL; |
| 158 | } |
| 159 | |
Damien Miller | 5ce662a | 1999-11-11 17:57:39 +1100 | [diff] [blame] | 160 | /* Error messages that should be logged. */ |
| 161 | |
| 162 | void |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 163 | error(const char *fmt,...) |
Damien Miller | 5ce662a | 1999-11-11 17:57:39 +1100 | [diff] [blame] | 164 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 165 | va_list args; |
Ben Lindstrom | 8e8ef2a | 2002-07-07 22:14:55 +0000 | [diff] [blame] | 166 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 167 | va_start(args, fmt); |
| 168 | do_log(SYSLOG_LEVEL_ERROR, fmt, args); |
| 169 | va_end(args); |
Damien Miller | 5ce662a | 1999-11-11 17:57:39 +1100 | [diff] [blame] | 170 | } |
| 171 | |
Damien Miller | 99a648e | 2006-08-19 00:32:20 +1000 | [diff] [blame] | 172 | void |
| 173 | sigdie(const char *fmt,...) |
| 174 | { |
Darren Tucker | aa1517c | 2006-08-20 17:55:54 +1000 | [diff] [blame] | 175 | #ifdef DO_LOG_SAFE_IN_SIGHAND |
Damien Miller | 99a648e | 2006-08-19 00:32:20 +1000 | [diff] [blame] | 176 | va_list args; |
| 177 | |
| 178 | va_start(args, fmt); |
| 179 | do_log(SYSLOG_LEVEL_FATAL, fmt, args); |
| 180 | va_end(args); |
Damien Miller | bb59814 | 2006-08-19 08:38:23 +1000 | [diff] [blame] | 181 | #endif |
Damien Miller | 99a648e | 2006-08-19 00:32:20 +1000 | [diff] [blame] | 182 | _exit(1); |
| 183 | } |
| 184 | |
dtucker@openbsd.org | af1f084 | 2016-07-15 05:01:58 +0000 | [diff] [blame] | 185 | void |
| 186 | logdie(const char *fmt,...) |
| 187 | { |
| 188 | va_list args; |
| 189 | |
| 190 | va_start(args, fmt); |
| 191 | do_log(SYSLOG_LEVEL_INFO, fmt, args); |
| 192 | va_end(args); |
| 193 | cleanup_exit(255); |
| 194 | } |
Damien Miller | 99a648e | 2006-08-19 00:32:20 +1000 | [diff] [blame] | 195 | |
Damien Miller | 5ce662a | 1999-11-11 17:57:39 +1100 | [diff] [blame] | 196 | /* Log this message (information that usually should go to the log). */ |
| 197 | |
| 198 | void |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 199 | logit(const char *fmt,...) |
Damien Miller | 5ce662a | 1999-11-11 17:57:39 +1100 | [diff] [blame] | 200 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 201 | va_list args; |
Ben Lindstrom | 8e8ef2a | 2002-07-07 22:14:55 +0000 | [diff] [blame] | 202 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 203 | va_start(args, fmt); |
Ben Lindstrom | db65e8f | 2001-01-19 04:26:52 +0000 | [diff] [blame] | 204 | do_log(SYSLOG_LEVEL_INFO, fmt, args); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 205 | va_end(args); |
Damien Miller | 5ce662a | 1999-11-11 17:57:39 +1100 | [diff] [blame] | 206 | } |
| 207 | |
| 208 | /* More detailed messages (information that does not need to go to the log). */ |
| 209 | |
| 210 | void |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 211 | verbose(const char *fmt,...) |
Damien Miller | 5ce662a | 1999-11-11 17:57:39 +1100 | [diff] [blame] | 212 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 213 | va_list args; |
Ben Lindstrom | 8e8ef2a | 2002-07-07 22:14:55 +0000 | [diff] [blame] | 214 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 215 | va_start(args, fmt); |
| 216 | do_log(SYSLOG_LEVEL_VERBOSE, fmt, args); |
| 217 | va_end(args); |
Damien Miller | 5ce662a | 1999-11-11 17:57:39 +1100 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | /* Debugging messages that should not be logged during normal operation. */ |
| 221 | |
| 222 | void |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 223 | debug(const char *fmt,...) |
Damien Miller | 5ce662a | 1999-11-11 17:57:39 +1100 | [diff] [blame] | 224 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 225 | va_list args; |
Ben Lindstrom | 8e8ef2a | 2002-07-07 22:14:55 +0000 | [diff] [blame] | 226 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 227 | va_start(args, fmt); |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 228 | do_log(SYSLOG_LEVEL_DEBUG1, fmt, args); |
| 229 | va_end(args); |
| 230 | } |
| 231 | |
| 232 | void |
| 233 | debug2(const char *fmt,...) |
| 234 | { |
| 235 | va_list args; |
Ben Lindstrom | 8e8ef2a | 2002-07-07 22:14:55 +0000 | [diff] [blame] | 236 | |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 237 | va_start(args, fmt); |
| 238 | do_log(SYSLOG_LEVEL_DEBUG2, fmt, args); |
| 239 | va_end(args); |
| 240 | } |
| 241 | |
| 242 | void |
| 243 | debug3(const char *fmt,...) |
| 244 | { |
| 245 | va_list args; |
Ben Lindstrom | 8e8ef2a | 2002-07-07 22:14:55 +0000 | [diff] [blame] | 246 | |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 247 | va_start(args, fmt); |
| 248 | do_log(SYSLOG_LEVEL_DEBUG3, fmt, args); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 249 | va_end(args); |
Damien Miller | 5ce662a | 1999-11-11 17:57:39 +1100 | [diff] [blame] | 250 | } |
| 251 | |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 252 | /* |
| 253 | * Initialize the log. |
| 254 | */ |
| 255 | |
| 256 | void |
| 257 | log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr) |
| 258 | { |
Darren Tucker | 9b5495d | 2005-02-01 17:35:09 +1100 | [diff] [blame] | 259 | #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT) |
| 260 | struct syslog_data sdata = SYSLOG_DATA_INIT; |
| 261 | #endif |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 262 | |
Darren Tucker | 835903d | 2005-03-09 20:12:47 +1100 | [diff] [blame] | 263 | argv0 = av0; |
| 264 | |
djm@openbsd.org | 54cd41a | 2017-05-17 01:24:17 +0000 | [diff] [blame] | 265 | if (log_change_level(level) != 0) { |
Kevin Steves | edcd576 | 2001-04-02 13:45:00 +0000 | [diff] [blame] | 266 | fprintf(stderr, "Unrecognized internal syslog level code %d\n", |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 267 | (int) level); |
| 268 | exit(1); |
| 269 | } |
| 270 | |
Damien Miller | 8f0bf23 | 2011-06-20 14:42:23 +1000 | [diff] [blame] | 271 | log_handler = NULL; |
| 272 | log_handler_ctx = NULL; |
| 273 | |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 274 | log_on_stderr = on_stderr; |
| 275 | if (on_stderr) |
| 276 | return; |
| 277 | |
| 278 | switch (facility) { |
| 279 | case SYSLOG_FACILITY_DAEMON: |
| 280 | log_facility = LOG_DAEMON; |
| 281 | break; |
| 282 | case SYSLOG_FACILITY_USER: |
| 283 | log_facility = LOG_USER; |
| 284 | break; |
| 285 | case SYSLOG_FACILITY_AUTH: |
| 286 | log_facility = LOG_AUTH; |
| 287 | break; |
Damien Miller | 30246a8 | 2001-03-05 21:23:31 +1100 | [diff] [blame] | 288 | #ifdef LOG_AUTHPRIV |
| 289 | case SYSLOG_FACILITY_AUTHPRIV: |
| 290 | log_facility = LOG_AUTHPRIV; |
| 291 | break; |
Ben Lindstrom | 53f11c6 | 2001-03-05 08:18:17 +0000 | [diff] [blame] | 292 | #endif |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 293 | case SYSLOG_FACILITY_LOCAL0: |
| 294 | log_facility = LOG_LOCAL0; |
| 295 | break; |
| 296 | case SYSLOG_FACILITY_LOCAL1: |
| 297 | log_facility = LOG_LOCAL1; |
| 298 | break; |
| 299 | case SYSLOG_FACILITY_LOCAL2: |
| 300 | log_facility = LOG_LOCAL2; |
| 301 | break; |
| 302 | case SYSLOG_FACILITY_LOCAL3: |
| 303 | log_facility = LOG_LOCAL3; |
| 304 | break; |
| 305 | case SYSLOG_FACILITY_LOCAL4: |
| 306 | log_facility = LOG_LOCAL4; |
| 307 | break; |
| 308 | case SYSLOG_FACILITY_LOCAL5: |
| 309 | log_facility = LOG_LOCAL5; |
| 310 | break; |
| 311 | case SYSLOG_FACILITY_LOCAL6: |
| 312 | log_facility = LOG_LOCAL6; |
| 313 | break; |
| 314 | case SYSLOG_FACILITY_LOCAL7: |
| 315 | log_facility = LOG_LOCAL7; |
| 316 | break; |
| 317 | default: |
| 318 | fprintf(stderr, |
Kevin Steves | edcd576 | 2001-04-02 13:45:00 +0000 | [diff] [blame] | 319 | "Unrecognized internal syslog facility code %d\n", |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 320 | (int) facility); |
| 321 | exit(1); |
| 322 | } |
Darren Tucker | 9b5495d | 2005-02-01 17:35:09 +1100 | [diff] [blame] | 323 | |
| 324 | /* |
| 325 | * If an external library (eg libwrap) attempts to use syslog |
| 326 | * immediately after reexec, syslog may be pointing to the wrong |
| 327 | * facility, so we force an open/close of syslog here. |
| 328 | */ |
| 329 | #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT) |
| 330 | openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata); |
| 331 | closelog_r(&sdata); |
| 332 | #else |
| 333 | openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility); |
| 334 | closelog(); |
| 335 | #endif |
Damien Miller | 6162d12 | 1999-11-21 13:23:52 +1100 | [diff] [blame] | 336 | } |
| 337 | |
djm@openbsd.org | 54cd41a | 2017-05-17 01:24:17 +0000 | [diff] [blame] | 338 | int |
Darren Tucker | 50a48d0 | 2012-09-06 21:25:37 +1000 | [diff] [blame] | 339 | log_change_level(LogLevel new_log_level) |
| 340 | { |
| 341 | /* no-op if log_init has not been called */ |
| 342 | if (argv0 == NULL) |
djm@openbsd.org | 54cd41a | 2017-05-17 01:24:17 +0000 | [diff] [blame] | 343 | return 0; |
| 344 | |
| 345 | switch (new_log_level) { |
| 346 | case SYSLOG_LEVEL_QUIET: |
| 347 | case SYSLOG_LEVEL_FATAL: |
| 348 | case SYSLOG_LEVEL_ERROR: |
| 349 | case SYSLOG_LEVEL_INFO: |
| 350 | case SYSLOG_LEVEL_VERBOSE: |
| 351 | case SYSLOG_LEVEL_DEBUG1: |
| 352 | case SYSLOG_LEVEL_DEBUG2: |
| 353 | case SYSLOG_LEVEL_DEBUG3: |
| 354 | log_level = new_log_level; |
| 355 | return 0; |
| 356 | default: |
| 357 | return -1; |
| 358 | } |
Darren Tucker | 50a48d0 | 2012-09-06 21:25:37 +1000 | [diff] [blame] | 359 | } |
| 360 | |
| 361 | int |
| 362 | log_is_on_stderr(void) |
| 363 | { |
djm@openbsd.org | d2d6bf8 | 2016-04-29 08:07:53 +0000 | [diff] [blame] | 364 | return log_on_stderr && log_stderr_fd == STDERR_FILENO; |
Darren Tucker | 50a48d0 | 2012-09-06 21:25:37 +1000 | [diff] [blame] | 365 | } |
| 366 | |
Damien Miller | 03d4d7e | 2013-04-23 15:21:06 +1000 | [diff] [blame] | 367 | /* redirect what would usually get written to stderr to specified file */ |
| 368 | void |
| 369 | log_redirect_stderr_to(const char *logfile) |
| 370 | { |
| 371 | int fd; |
| 372 | |
| 373 | if ((fd = open(logfile, O_WRONLY|O_CREAT|O_APPEND, 0600)) == -1) { |
| 374 | fprintf(stderr, "Couldn't open logfile %s: %s\n", logfile, |
| 375 | strerror(errno)); |
| 376 | exit(1); |
| 377 | } |
| 378 | log_stderr_fd = fd; |
| 379 | } |
| 380 | |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 381 | #define MSGBUFSIZ 1024 |
| 382 | |
Ben Lindstrom | 9c8edc9 | 2002-02-26 17:52:14 +0000 | [diff] [blame] | 383 | void |
Damien Miller | 8f0bf23 | 2011-06-20 14:42:23 +1000 | [diff] [blame] | 384 | set_log_handler(log_handler_fn *handler, void *ctx) |
| 385 | { |
| 386 | log_handler = handler; |
| 387 | log_handler_ctx = ctx; |
| 388 | } |
| 389 | |
| 390 | void |
| 391 | do_log2(LogLevel level, const char *fmt,...) |
| 392 | { |
| 393 | va_list args; |
| 394 | |
| 395 | va_start(args, fmt); |
| 396 | do_log(level, fmt, args); |
| 397 | va_end(args); |
| 398 | } |
| 399 | |
| 400 | void |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 401 | do_log(LogLevel level, const char *fmt, va_list args) |
Damien Miller | 6162d12 | 1999-11-21 13:23:52 +1100 | [diff] [blame] | 402 | { |
Damien Miller | 051b0ac | 2004-02-18 22:59:43 +1100 | [diff] [blame] | 403 | #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT) |
Damien Miller | 74a3442 | 2003-05-20 09:24:17 +1000 | [diff] [blame] | 404 | struct syslog_data sdata = SYSLOG_DATA_INIT; |
| 405 | #endif |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 406 | char msgbuf[MSGBUFSIZ]; |
| 407 | char fmtbuf[MSGBUFSIZ]; |
| 408 | char *txt = NULL; |
| 409 | int pri = LOG_INFO; |
Darren Tucker | 36b7800 | 2007-05-20 15:08:15 +1000 | [diff] [blame] | 410 | int saved_errno = errno; |
Damien Miller | 8f0bf23 | 2011-06-20 14:42:23 +1000 | [diff] [blame] | 411 | log_handler_fn *tmp_handler; |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 412 | |
| 413 | if (level > log_level) |
| 414 | return; |
| 415 | |
| 416 | switch (level) { |
| 417 | case SYSLOG_LEVEL_FATAL: |
| 418 | if (!log_on_stderr) |
| 419 | txt = "fatal"; |
| 420 | pri = LOG_CRIT; |
| 421 | break; |
| 422 | case SYSLOG_LEVEL_ERROR: |
| 423 | if (!log_on_stderr) |
| 424 | txt = "error"; |
| 425 | pri = LOG_ERR; |
| 426 | break; |
| 427 | case SYSLOG_LEVEL_INFO: |
| 428 | pri = LOG_INFO; |
| 429 | break; |
| 430 | case SYSLOG_LEVEL_VERBOSE: |
| 431 | pri = LOG_INFO; |
| 432 | break; |
| 433 | case SYSLOG_LEVEL_DEBUG1: |
| 434 | txt = "debug1"; |
| 435 | pri = LOG_DEBUG; |
| 436 | break; |
| 437 | case SYSLOG_LEVEL_DEBUG2: |
| 438 | txt = "debug2"; |
| 439 | pri = LOG_DEBUG; |
| 440 | break; |
| 441 | case SYSLOG_LEVEL_DEBUG3: |
| 442 | txt = "debug3"; |
| 443 | pri = LOG_DEBUG; |
| 444 | break; |
| 445 | default: |
| 446 | txt = "internal error"; |
| 447 | pri = LOG_ERR; |
| 448 | break; |
| 449 | } |
Damien Miller | 8f0bf23 | 2011-06-20 14:42:23 +1000 | [diff] [blame] | 450 | if (txt != NULL && log_handler == NULL) { |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 451 | snprintf(fmtbuf, sizeof(fmtbuf), "%s: %s", txt, fmt); |
| 452 | vsnprintf(msgbuf, sizeof(msgbuf), fmtbuf, args); |
| 453 | } else { |
| 454 | vsnprintf(msgbuf, sizeof(msgbuf), fmt, args); |
| 455 | } |
Damien Miller | 23a7027 | 2004-07-21 10:52:13 +1000 | [diff] [blame] | 456 | strnvis(fmtbuf, msgbuf, sizeof(fmtbuf), |
| 457 | log_on_stderr ? LOG_STDERR_VIS : LOG_SYSLOG_VIS); |
Damien Miller | 8f0bf23 | 2011-06-20 14:42:23 +1000 | [diff] [blame] | 458 | if (log_handler != NULL) { |
| 459 | /* Avoid recursion */ |
| 460 | tmp_handler = log_handler; |
| 461 | log_handler = NULL; |
| 462 | tmp_handler(level, fmtbuf, log_handler_ctx); |
| 463 | log_handler = tmp_handler; |
| 464 | } else if (log_on_stderr) { |
djm@openbsd.org | 9747b9c | 2017-03-10 03:15:58 +0000 | [diff] [blame] | 465 | snprintf(msgbuf, sizeof msgbuf, "%.*s\r\n", |
| 466 | (int)sizeof msgbuf - 3, fmtbuf); |
Darren Tucker | dbee308 | 2013-05-16 20:32:29 +1000 | [diff] [blame] | 467 | (void)write(log_stderr_fd, msgbuf, strlen(msgbuf)); |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 468 | } else { |
Damien Miller | 051b0ac | 2004-02-18 22:59:43 +1100 | [diff] [blame] | 469 | #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT) |
Damien Miller | 74a3442 | 2003-05-20 09:24:17 +1000 | [diff] [blame] | 470 | openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata); |
Damien Miller | c11fe25 | 2003-05-25 14:38:02 +1000 | [diff] [blame] | 471 | syslog_r(pri, &sdata, "%.500s", fmtbuf); |
Damien Miller | 74a3442 | 2003-05-20 09:24:17 +1000 | [diff] [blame] | 472 | closelog_r(&sdata); |
| 473 | #else |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 474 | openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility); |
Damien Miller | b93addb | 2003-01-07 17:04:18 +1100 | [diff] [blame] | 475 | syslog(pri, "%.500s", fmtbuf); |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 476 | closelog(); |
Damien Miller | 74a3442 | 2003-05-20 09:24:17 +1000 | [diff] [blame] | 477 | #endif |
Ben Lindstrom | 8a432f5 | 2001-03-05 07:24:46 +0000 | [diff] [blame] | 478 | } |
Darren Tucker | 36b7800 | 2007-05-20 15:08:15 +1000 | [diff] [blame] | 479 | errno = saved_errno; |
Damien Miller | 6162d12 | 1999-11-21 13:23:52 +1100 | [diff] [blame] | 480 | } |