2 * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
3 * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
5 * This file is part of LVM2.
7 * This copyrighted material is made available to anyone wishing to use,
8 * modify, copy, or redistribute it subject to the terms and conditions
9 * of the GNU Lesser General Public License v.2.1.
11 * You should have received a copy of the GNU Lesser General Public License
12 * along with this program; if not, write to the Free Software Foundation,
13 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 #include "lvm-string.h"
27 static FILE *_log_file;
28 static struct device _log_dev;
29 static struct str_list _log_dev_alias;
31 static int _syslog = 0;
32 static int _log_to_file = 0;
33 static int _log_direct = 0;
34 static int _log_while_suspended = 0;
35 static int _indent = 1;
36 static int _log_suppress = 0;
37 static char _msg_prefix[30] = " ";
38 static int _already_logging = 0;
39 static int _abort_on_internal_errors = 0;
41 static lvm2_log_fn_t _lvm2_log_fn = NULL;
43 static int _lvm_errno = 0;
44 static int _store_errmsg = 0;
45 static char *_lvm_errmsg = NULL;
47 void init_log_fn(lvm2_log_fn_t log_fn)
50 _lvm2_log_fn = log_fn;
55 void init_log_file(const char *log_file, int append)
57 const char *open_mode = append ? "a" : "w";
59 if (!(_log_file = fopen(log_file, open_mode))) {
60 log_sys_error("fopen", log_file);
67 void init_log_direct(const char *log_file, int append)
69 int open_flags = append ? 0 : O_TRUNC;
71 dev_create_file(log_file, &_log_dev, &_log_dev_alias, 1);
72 if (!dev_open_flags(&_log_dev, O_RDWR | O_CREAT | open_flags, 1, 0))
78 void init_log_while_suspended(int log_while_suspended)
80 _log_while_suspended = log_while_suspended;
83 void init_syslog(int facility)
85 openlog("lvm", LOG_PID, facility);
89 int log_suppress(int suppress)
91 int old_suppress = _log_suppress;
93 _log_suppress = suppress;
98 void release_log_memory(void)
103 dm_free((char *) _log_dev_alias.str);
104 _log_dev_alias.str = "activate_log file";
110 dev_close(&_log_dev);
115 if (dm_fclose(_log_file)) {
117 fprintf(stderr, "failed to write log file: %s\n",
120 fprintf(stderr, "failed to write log file\n");
134 void init_msg_prefix(const char *prefix)
136 strncpy(_msg_prefix, prefix, sizeof(_msg_prefix));
137 _msg_prefix[sizeof(_msg_prefix) - 1] = '\0';
140 void init_indent(int indent)
145 void init_abort_on_internal_errors(int fatal)
147 _abort_on_internal_errors = fatal;
150 void reset_lvm_errno(int store_errmsg)
155 dm_free(_lvm_errmsg);
159 _store_errmsg = store_errmsg;
162 int stored_errno(void)
167 const char *stored_errmsg(void)
169 return _lvm_errmsg ? : "";
172 static struct dm_hash_table *_duplicated = NULL;
174 void reset_log_duplicated(void) {
176 dm_hash_destroy(_duplicated);
180 void print_log(int level, const char *file, int line, int dm_errno,
181 const char *format, ...)
184 char buf[1024], buf2[4096], locn[4096];
187 const char *trformat; /* Translated format string */
189 int use_stderr = level & _LOG_STDERR;
190 int log_once = level & _LOG_ONCE;
191 int fatal_internal_error = 0;
193 level &= ~(_LOG_STDERR|_LOG_ONCE);
195 if (_abort_on_internal_errors &&
196 !strncmp(format, INTERNAL_ERROR,
197 strlen(INTERNAL_ERROR))) {
198 fatal_internal_error = 1;
199 /* Internal errors triggering abort cannot be suppressed. */
204 if (_log_suppress == 2)
207 if (level <= _LOG_ERR)
208 init_error_message_produced(1);
210 trformat = _(format);
212 if (dm_errno && !_lvm_errno)
213 _lvm_errno = dm_errno;
216 (_store_errmsg && (level <= _LOG_ERR)) ||
218 va_start(ap, format);
219 n = vsnprintf(buf2, sizeof(buf2) - 1, trformat, ap);
223 fprintf(stderr, _("vsnprintf failed: skipping external "
224 "logging function"));
228 buf2[sizeof(buf2) - 1] = '\0';
232 if (_store_errmsg && (level <= _LOG_ERR)) {
234 _lvm_errmsg = dm_strdup(message);
235 else if ((newbuf = dm_realloc(_lvm_errmsg,
236 strlen(_lvm_errmsg) +
237 strlen(message) + 2))) {
238 _lvm_errmsg = strcat(newbuf, "\n");
239 _lvm_errmsg = strcat(newbuf, message);
245 _duplicated = dm_hash_create(128);
247 if (dm_hash_lookup(_duplicated, message))
249 dm_hash_insert(_duplicated, message, (void*)1);
254 _lvm2_log_fn(level, file, line, 0, message);
255 if (fatal_internal_error)
261 if (!_log_suppress) {
262 if (verbose_level() > _LOG_DEBUG)
263 dm_snprintf(locn, sizeof(locn), "#%s:%d ",
268 va_start(ap, format);
271 if (!strcmp("<backtrace>", format) &&
272 verbose_level() <= _LOG_DEBUG)
274 if (verbose_level() >= _LOG_DEBUG) {
275 fprintf(stderr, "%s%s%s", locn, log_command_name(),
278 fprintf(stderr, " ");
279 vfprintf(stderr, trformat, ap);
285 if (verbose_level() >= _LOG_INFO) {
286 fprintf(stderr, "%s%s%s", locn, log_command_name(),
289 fprintf(stderr, " ");
290 vfprintf(stderr, trformat, ap);
295 if (verbose_level() >= _LOG_NOTICE) {
296 fprintf(stderr, "%s%s%s", locn, log_command_name(),
299 fprintf(stderr, " ");
300 vfprintf(stderr, trformat, ap);
305 if (verbose_level() >= _LOG_WARN) {
306 fprintf(use_stderr ? stderr : stdout, "%s%s",
307 log_command_name(), _msg_prefix);
308 vfprintf(use_stderr ? stderr : stdout, trformat, ap);
309 fputc('\n', use_stderr ? stderr : stdout);
313 if (verbose_level() >= _LOG_ERR) {
314 fprintf(stderr, "%s%s%s", locn, log_command_name(),
316 vfprintf(stderr, trformat, ap);
322 if (verbose_level() >= _LOG_FATAL) {
323 fprintf(stderr, "%s%s%s", locn, log_command_name(),
325 vfprintf(stderr, trformat, ap);
333 if (fatal_internal_error)
336 if (level > debug_level())
339 if (_log_to_file && (_log_while_suspended || !memlock())) {
340 fprintf(_log_file, "%s:%d %s%s", file, line, log_command_name(),
343 va_start(ap, format);
344 vfprintf(_log_file, trformat, ap);
347 fprintf(_log_file, "\n");
351 if (_syslog && (_log_while_suspended || !memlock())) {
352 va_start(ap, format);
353 vsyslog(level, trformat, ap);
357 /* FIXME This code is unfinished - pre-extend & condense. */
358 if (!_already_logging && _log_direct && memlock()) {
359 _already_logging = 1;
360 memset(&buf, ' ', sizeof(buf));
362 if ((n = dm_snprintf(buf, sizeof(buf) - 1,
363 "%s:%d %s%s", file, line, log_command_name(),
369 va_start(ap, format);
370 n = vsnprintf(buf + bufused - 1, sizeof(buf) - bufused - 1,
376 buf[bufused - 1] = '\n';
378 buf[sizeof(buf) - 1] = '\n';
379 /* FIXME real size bufused */
380 dev_append(&_log_dev, sizeof(buf), buf);
381 _already_logging = 0;