sig_handlers, log: convert to C++
This commit is contained in:
Max Kellermann
341
src/Log.cxx
Normal file
341
src/Log.cxx
Normal file
@@ -0,0 +1,341 @@
|
||||
/*
|
||||
* Copyright (C) 2003-2013 The Music Player Daemon Project
|
||||
* http://www.musicpd.org
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* 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.,
|
||||
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
||||
*/
|
||||
|
||||
#include "config.h"
|
||||
#include "Log.hxx"
|
||||
#include "conf.h"
|
||||
#include "utils.h"
|
||||
#include "fd_util.h"
|
||||
#include "mpd_error.h"
|
||||
|
||||
#include <assert.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
#include <string.h>
|
||||
#include <stdarg.h>
|
||||
#include <fcntl.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <time.h>
|
||||
#include <unistd.h>
|
||||
#include <errno.h>
|
||||
#include <glib.h>
|
||||
|
||||
#ifdef HAVE_SYSLOG
|
||||
#include <syslog.h>
|
||||
#endif
|
||||
|
||||
#undef G_LOG_DOMAIN
|
||||
#define G_LOG_DOMAIN "log"
|
||||
|
||||
#define LOG_LEVEL_SECURE G_LOG_LEVEL_INFO
|
||||
|
||||
#define LOG_DATE_BUF_SIZE 16
|
||||
#define LOG_DATE_LEN (LOG_DATE_BUF_SIZE - 1)
|
||||
|
||||
static GLogLevelFlags log_threshold = G_LOG_LEVEL_MESSAGE;
|
||||
|
||||
static const char *log_charset;
|
||||
|
||||
static bool stdout_mode = true;
|
||||
static int out_fd;
|
||||
static char *out_filename;
|
||||
|
||||
static void redirect_logs(int fd)
|
||||
{
|
||||
assert(fd >= 0);
|
||||
if (dup2(fd, STDOUT_FILENO) < 0)
|
||||
MPD_ERROR("problems dup2 stdout : %s\n", strerror(errno));
|
||||
if (dup2(fd, STDERR_FILENO) < 0)
|
||||
MPD_ERROR("problems dup2 stderr : %s\n", strerror(errno));
|
||||
}
|
||||
|
||||
static const char *log_date(void)
|
||||
{
|
||||
static char buf[LOG_DATE_BUF_SIZE];
|
||||
time_t t = time(NULL);
|
||||
strftime(buf, LOG_DATE_BUF_SIZE, "%b %d %H:%M : ", localtime(&t));
|
||||
return buf;
|
||||
}
|
||||
|
||||
/**
|
||||
* Determines the length of the string excluding trailing whitespace
|
||||
* characters.
|
||||
*/
|
||||
static int
|
||||
chomp_length(const char *p)
|
||||
{
|
||||
size_t length = strlen(p);
|
||||
|
||||
while (length > 0 && g_ascii_isspace(p[length - 1]))
|
||||
--length;
|
||||
|
||||
return (int)length;
|
||||
}
|
||||
|
||||
static void
|
||||
file_log_func(const gchar *log_domain,
|
||||
GLogLevelFlags log_level,
|
||||
const gchar *message, G_GNUC_UNUSED gpointer user_data)
|
||||
{
|
||||
char *converted;
|
||||
|
||||
if (log_level > log_threshold)
|
||||
return;
|
||||
|
||||
if (log_charset != NULL) {
|
||||
converted = g_convert_with_fallback(message, -1,
|
||||
log_charset, "utf-8",
|
||||
NULL, NULL, NULL, NULL);
|
||||
if (converted != NULL)
|
||||
message = converted;
|
||||
} else
|
||||
converted = NULL;
|
||||
|
||||
if (log_domain == NULL)
|
||||
log_domain = "";
|
||||
|
||||
fprintf(stderr, "%s%s%s%.*s\n",
|
||||
stdout_mode ? "" : log_date(),
|
||||
log_domain, *log_domain == 0 ? "" : ": ",
|
||||
chomp_length(message), message);
|
||||
|
||||
g_free(converted);
|
||||
}
|
||||
|
||||
static void
|
||||
log_init_stdout(void)
|
||||
{
|
||||
g_log_set_default_handler(file_log_func, NULL);
|
||||
}
|
||||
|
||||
static int
|
||||
open_log_file(void)
|
||||
{
|
||||
assert(out_filename != NULL);
|
||||
|
||||
return open_cloexec(out_filename, O_CREAT | O_WRONLY | O_APPEND, 0666);
|
||||
}
|
||||
|
||||
static bool
|
||||
log_init_file(unsigned line, GError **error_r)
|
||||
{
|
||||
assert(out_filename != NULL);
|
||||
|
||||
out_fd = open_log_file();
|
||||
if (out_fd < 0) {
|
||||
g_set_error(error_r, log_quark(), errno,
|
||||
"failed to open log file \"%s\" (config line %u): %s",
|
||||
out_filename, line, g_strerror(errno));
|
||||
return false;
|
||||
}
|
||||
|
||||
g_log_set_default_handler(file_log_func, NULL);
|
||||
return true;
|
||||
}
|
||||
|
||||
#ifdef HAVE_SYSLOG
|
||||
|
||||
static int
|
||||
glib_to_syslog_level(GLogLevelFlags log_level)
|
||||
{
|
||||
switch (log_level & G_LOG_LEVEL_MASK) {
|
||||
case G_LOG_LEVEL_ERROR:
|
||||
case G_LOG_LEVEL_CRITICAL:
|
||||
return LOG_ERR;
|
||||
|
||||
case G_LOG_LEVEL_WARNING:
|
||||
return LOG_WARNING;
|
||||
|
||||
case G_LOG_LEVEL_MESSAGE:
|
||||
return LOG_NOTICE;
|
||||
|
||||
case G_LOG_LEVEL_INFO:
|
||||
return LOG_INFO;
|
||||
|
||||
case G_LOG_LEVEL_DEBUG:
|
||||
return LOG_DEBUG;
|
||||
|
||||
default:
|
||||
return LOG_NOTICE;
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
syslog_log_func(const gchar *log_domain,
|
||||
GLogLevelFlags log_level, const gchar *message,
|
||||
G_GNUC_UNUSED gpointer user_data)
|
||||
{
|
||||
if (stdout_mode) {
|
||||
/* fall back to the file log function during
|
||||
startup */
|
||||
file_log_func(log_domain, log_level,
|
||||
message, user_data);
|
||||
return;
|
||||
}
|
||||
|
||||
if (log_level > log_threshold)
|
||||
return;
|
||||
|
||||
if (log_domain == NULL)
|
||||
log_domain = "";
|
||||
|
||||
syslog(glib_to_syslog_level(log_level), "%s%s%.*s",
|
||||
log_domain, *log_domain == 0 ? "" : ": ",
|
||||
chomp_length(message), message);
|
||||
}
|
||||
|
||||
static void
|
||||
log_init_syslog(void)
|
||||
{
|
||||
assert(out_filename == NULL);
|
||||
|
||||
openlog(PACKAGE, 0, LOG_DAEMON);
|
||||
g_log_set_default_handler(syslog_log_func, NULL);
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
static inline GLogLevelFlags
|
||||
parse_log_level(const char *value, unsigned line)
|
||||
{
|
||||
if (0 == strcmp(value, "default"))
|
||||
return G_LOG_LEVEL_MESSAGE;
|
||||
if (0 == strcmp(value, "secure"))
|
||||
return LOG_LEVEL_SECURE;
|
||||
else if (0 == strcmp(value, "verbose"))
|
||||
return G_LOG_LEVEL_DEBUG;
|
||||
else {
|
||||
MPD_ERROR("unknown log level \"%s\" at line %u\n",
|
||||
value, line);
|
||||
return G_LOG_LEVEL_MESSAGE;
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
log_early_init(bool verbose)
|
||||
{
|
||||
if (verbose)
|
||||
log_threshold = G_LOG_LEVEL_DEBUG;
|
||||
|
||||
log_init_stdout();
|
||||
}
|
||||
|
||||
bool
|
||||
log_init(bool verbose, bool use_stdout, GError **error_r)
|
||||
{
|
||||
const struct config_param *param;
|
||||
|
||||
g_get_charset(&log_charset);
|
||||
|
||||
if (verbose)
|
||||
log_threshold = G_LOG_LEVEL_DEBUG;
|
||||
else if ((param = config_get_param(CONF_LOG_LEVEL)) != NULL)
|
||||
log_threshold = parse_log_level(param->value, param->line);
|
||||
|
||||
if (use_stdout) {
|
||||
log_init_stdout();
|
||||
return true;
|
||||
} else {
|
||||
param = config_get_param(CONF_LOG_FILE);
|
||||
if (param == NULL) {
|
||||
#ifdef HAVE_SYSLOG
|
||||
/* no configuration: default to syslog (if
|
||||
available) */
|
||||
log_init_syslog();
|
||||
return true;
|
||||
#else
|
||||
g_set_error(error_r, log_quark(), 0,
|
||||
"config parameter \"%s\" not found",
|
||||
CONF_LOG_FILE);
|
||||
return false;
|
||||
#endif
|
||||
#ifdef HAVE_SYSLOG
|
||||
} else if (strcmp(param->value, "syslog") == 0) {
|
||||
log_init_syslog();
|
||||
return true;
|
||||
#endif
|
||||
} else {
|
||||
out_filename = config_dup_path(CONF_LOG_FILE, error_r);
|
||||
return out_filename != NULL &&
|
||||
log_init_file(param->line, error_r);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
close_log_files(void)
|
||||
{
|
||||
if (stdout_mode)
|
||||
return;
|
||||
|
||||
#ifdef HAVE_SYSLOG
|
||||
if (out_filename == NULL)
|
||||
closelog();
|
||||
#endif
|
||||
}
|
||||
|
||||
void
|
||||
log_deinit(void)
|
||||
{
|
||||
close_log_files();
|
||||
g_free(out_filename);
|
||||
}
|
||||
|
||||
|
||||
void setup_log_output(bool use_stdout)
|
||||
{
|
||||
fflush(NULL);
|
||||
if (!use_stdout) {
|
||||
#ifndef WIN32
|
||||
if (out_filename == NULL)
|
||||
out_fd = open("/dev/null", O_WRONLY);
|
||||
#endif
|
||||
|
||||
if (out_fd >= 0) {
|
||||
redirect_logs(out_fd);
|
||||
close(out_fd);
|
||||
}
|
||||
|
||||
stdout_mode = false;
|
||||
log_charset = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
int cycle_log_files(void)
|
||||
{
|
||||
int fd;
|
||||
|
||||
if (stdout_mode || out_filename == NULL)
|
||||
return 0;
|
||||
assert(out_filename);
|
||||
|
||||
g_debug("Cycling log files...\n");
|
||||
close_log_files();
|
||||
|
||||
fd = open_log_file();
|
||||
if (fd < 0) {
|
||||
g_warning("error re-opening log file: %s\n", out_filename);
|
||||
return -1;
|
||||
}
|
||||
|
||||
redirect_logs(fd);
|
||||
g_debug("Done cycling log files\n");
|
||||
return 0;
|
||||
}
|
||||
Reference in New Issue
Block a user