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lvm2/lib/log/log.c

397 lines
7.4 KiB
C

/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU General Public License v.2.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "lib.h"
#include "device.h"
#include "memlock.h"
#include "lvm-string.h"
#include <stdarg.h>
#include <syslog.h>
static FILE *_log_file;
static struct device _log_dev;
static struct str_list _log_dev_alias;
static int _verbose_level = VERBOSE_BASE_LEVEL;
static int _test = 0;
static int _partial = 0;
static int _md_filtering = 0;
static int _pvmove = 0;
static int _full_scan_done = 0; /* Restrict to one full scan during each cmd */
static int _debug_level = 0;
static int _syslog = 0;
static int _log_to_file = 0;
static int _log_direct = 0;
static int _log_while_suspended = 0;
static int _indent = 1;
static int _log_cmd_name = 0;
static int _log_suppress = 0;
static int _ignorelockingfailure = 0;
static int _lockingfailed = 0;
static int _security_level = SECURITY_LEVEL;
static char _cmd_name[30] = "";
static char _msg_prefix[30] = " ";
static int _already_logging = 0;
static lvm2_log_fn_t _lvm2_log_fn = NULL;
void init_log_fn(lvm2_log_fn_t log_fn)
{
if (log_fn)
_lvm2_log_fn = log_fn;
else
_lvm2_log_fn = NULL;
}
void init_log_file(const char *log_file, int append)
{
const char *open_mode = append ? "a" : "w";
if (!(_log_file = fopen(log_file, open_mode))) {
log_sys_error("fopen", log_file);
return;
}
_log_to_file = 1;
}
void init_log_direct(const char *log_file, int append)
{
int open_flags = append ? 0 : O_TRUNC;
dev_create_file(log_file, &_log_dev, &_log_dev_alias);
if (!dev_open_flags(&_log_dev, O_RDWR | O_CREAT | open_flags, 1, 0))
return;
_log_direct = 1;
}
void init_log_while_suspended(int log_while_suspended)
{
_log_while_suspended = log_while_suspended;
}
void init_syslog(int facility)
{
openlog("lvm", LOG_PID, facility);
_syslog = 1;
}
void log_suppress(int suppress)
{
_log_suppress = suppress;
}
void release_log_memory(void)
{
if (!_log_direct)
return;
dbg_free((char *) _log_dev_alias.str);
_log_dev_alias.str = "activate_log file";
}
void fin_log(void)
{
if (_log_direct) {
dev_close(&_log_dev);
_log_direct = 0;
}
if (_log_to_file) {
fclose(_log_file);
_log_to_file = 0;
}
}
void fin_syslog()
{
if (_syslog)
closelog();
_syslog = 0;
}
void init_verbose(int level)
{
_verbose_level = level;
}
void init_test(int level)
{
if (!_test && level)
log_print("Test mode: Metadata will NOT be updated.");
_test = level;
}
void init_partial(int level)
{
_partial = level;
}
void init_md_filtering(int level)
{
_md_filtering = level;
}
void init_pvmove(int level)
{
_pvmove = level;
}
void init_full_scan_done(int level)
{
_full_scan_done = level;
}
void init_ignorelockingfailure(int level)
{
_ignorelockingfailure = level;
}
void init_lockingfailed(int level)
{
_lockingfailed = level;
}
void init_security_level(int level)
{
_security_level = level;
}
void init_cmd_name(int status)
{
_log_cmd_name = status;
}
void set_cmd_name(const char *cmd)
{
if (!_log_cmd_name)
return;
strncpy(_cmd_name, cmd, sizeof(_cmd_name));
_cmd_name[sizeof(_cmd_name) - 1] = '\0';
}
void init_msg_prefix(const char *prefix)
{
strncpy(_msg_prefix, prefix, sizeof(_msg_prefix));
_msg_prefix[sizeof(_msg_prefix) - 1] = '\0';
}
void init_indent(int indent)
{
_indent = indent;
}
int test_mode()
{
return _test;
}
int partial_mode()
{
return _partial;
}
int md_filtering()
{
return _md_filtering;
}
int pvmove_mode()
{
return _pvmove;
}
int full_scan_done()
{
return _full_scan_done;
}
int lockingfailed()
{
return _lockingfailed;
}
int ignorelockingfailure()
{
return _ignorelockingfailure;
}
int security_level()
{
return _security_level;
}
void init_debug(int level)
{
_debug_level = level;
}
int debug_level()
{
return _debug_level;
}
void print_log(int level, const char *file, int line, const char *format, ...)
{
va_list ap;
char buf[1024], buf2[4096], locn[4096];
int bufused, n;
const char *message;
const char *trformat; /* Translated format string */
trformat = _(format);
if (_lvm2_log_fn) {
va_start(ap, format);
n = vsnprintf(buf2, sizeof(buf2) - 1, trformat, ap);
va_end(ap);
if (n < 0) {
fprintf(stderr, _("vsnprintf failed: skipping external "
"logging function"));
goto log_it;
}
buf2[sizeof(buf2) - 1] = '\0';
message = &buf2[0];
_lvm2_log_fn(level, file, line, message);
return;
}
log_it:
if (!_log_suppress) {
if (_verbose_level > _LOG_DEBUG)
lvm_snprintf(locn, sizeof(locn), "#%s:%d ",
file, line);
else
locn[0] = '\0';
va_start(ap, format);
switch (level) {
case _LOG_DEBUG:
if (!strcmp("<backtrace>", format) &&
_verbose_level <= _LOG_DEBUG)
break;
if (_verbose_level >= _LOG_DEBUG) {
fprintf(stderr, "%s%s%s", locn, _cmd_name,
_msg_prefix);
if (_indent)
fprintf(stderr, " ");
vfprintf(stderr, trformat, ap);
fputc('\n', stderr);
}
break;
case _LOG_INFO:
if (_verbose_level >= _LOG_INFO) {
fprintf(stderr, "%s%s%s", locn, _cmd_name,
_msg_prefix);
if (_indent)
fprintf(stderr, " ");
vfprintf(stderr, trformat, ap);
fputc('\n', stderr);
}
break;
case _LOG_NOTICE:
if (_verbose_level >= _LOG_NOTICE) {
fprintf(stderr, "%s%s%s", locn, _cmd_name,
_msg_prefix);
if (_indent)
fprintf(stderr, " ");
vfprintf(stderr, trformat, ap);
fputc('\n', stderr);
}
break;
case _LOG_WARN:
if (_verbose_level >= _LOG_WARN) {
printf("%s%s", _cmd_name, _msg_prefix);
vprintf(trformat, ap);
putchar('\n');
}
break;
case _LOG_ERR:
if (_verbose_level >= _LOG_ERR) {
fprintf(stderr, "%s%s%s", locn, _cmd_name,
_msg_prefix);
vfprintf(stderr, trformat, ap);
fputc('\n', stderr);
}
break;
case _LOG_FATAL:
default:
if (_verbose_level >= _LOG_FATAL) {
fprintf(stderr, "%s%s%s", locn, _cmd_name,
_msg_prefix);
vfprintf(stderr, trformat, ap);
fputc('\n', stderr);
}
break;
}
va_end(ap);
}
if (level > _debug_level)
return;
if (_log_to_file && (_log_while_suspended || !memlock())) {
fprintf(_log_file, "%s:%d %s%s", file, line, _cmd_name,
_msg_prefix);
va_start(ap, format);
vfprintf(_log_file, trformat, ap);
va_end(ap);
fprintf(_log_file, "\n");
fflush(_log_file);
}
if (_syslog && (_log_while_suspended || !memlock())) {
va_start(ap, format);
vsyslog(level, trformat, ap);
va_end(ap);
}
/* FIXME This code is unfinished - pre-extend & condense. */
if (!_already_logging && _log_direct && memlock()) {
_already_logging = 1;
memset(&buf, ' ', sizeof(buf));
bufused = 0;
if ((n = lvm_snprintf(buf, sizeof(buf) - bufused - 1,
"%s:%d %s%s", file, line, _cmd_name,
_msg_prefix)) == -1)
goto done;
bufused += n;
va_start(ap, format);
n = vsnprintf(buf + bufused - 1, sizeof(buf) - bufused - 1,
trformat, ap);
va_end(ap);
bufused += n;
done:
buf[bufused - 1] = '\n';
buf[bufused] = '\n';
buf[sizeof(buf) - 1] = '\n';
/* FIXME real size bufused */
dev_append(&_log_dev, sizeof(buf), buf);
_already_logging = 0;
}
}