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/* log.c - Logging and user information routines
*
* Copyright (C) 2005, 2007 Oskar Liljeblad
*
* 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 3 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 Library 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 <sys/types.h> /* POSIX */
#include <unistd.h> /* POSIX */
#include <time.h> /* POSIX */
#include <stdio.h> /* C89 */
#include <stdlib.h> /* C89 */
#include <stdarg.h> /* C89 */
#include <errno.h> /* C89 */
#include "gettext.h" /* Gnulib/gettext */
#define _(s) gettext(s)
#define N_(s) gettext_noop(s)
#include "xvasprintf.h" /* Gnulib */
#include "strftime.h" /* Gnulib */
#include "progname.h" /* Gnulib */
#include "quote.h" /* Gnulib */
#include "gmediaserver.h"
#define MAX_TIMESTAMP_LENGTH 1024
uint32_t verbosity = 0;
static FILE *logfh = NULL;
static const char *timestamp_format = NULL;
static bool started = false;
static char *
prepare_msg_v(const char *format, va_list args)
{
char *msg1;
char *msg2;
msg1 = xvasprintf(format, args);
msg2 = convert_string_to_log(msg1);
if (msg2 == NULL) {
warn(_("cannot convert log message: %s\n"), errstr);
msg2 = msg1; /* print raw! */
} else {
free(msg1);
}
return msg2;
}
static char *
prepare_msg(const char *format, ...)
{
va_list args;
char *msg;
va_start(args, format);
msg = prepare_msg_v(format, args);
va_end(args);
return msg;
}
static void
log_timestamp(FILE *out)
{
if (timestamp_format != NULL) {
time_t curtime;
struct tm *loctime;
size_t len;
if (time(&curtime) < 0) {
/* XXX: report error somehow? */
return;
}
loctime = localtime(&curtime);
len = nstrftime(NULL, -1, timestamp_format, loctime, 0, 0);
if (len > 0) {
char buf[len+1];
char *msg;
nstrftime(buf, len+1, timestamp_format, loctime, 0, 0);
msg = prepare_msg("%s ", buf);
fputs(msg, out);
free(msg);
}
}
}
void
init_logging(const char *logfilename, const char *ts_format)
{
timestamp_format = ts_format;
started = true;
if (logfilename != NULL) {
logfh = fopen(logfilename, "a");
if (logfh == NULL)
die(_("cannot open log file %s for appending\n"), quote(conv_filename(logfilename)));
setlinebuf(logfh);
}
say(1, _("%s process id %d starting\n"), PACKAGE, getpid());
}
void
finish_logging(bool success)
{
if (success)
say(1, _("%s process id %d terminated normally\n"), PACKAGE, getpid());
else
say(1, _("%s process id %d terminated due to error\n"), PACKAGE, getpid());
if (logfh != NULL) {
fclose(logfh);
logfh = NULL;
}
started = false;
}
void
say(int level, const char *format, ...)
{
if (verbosity >= level) {
va_list args;
char *msg;
va_start(args, format);
msg = prepare_msg_v(format, args);
if (logfh != NULL) {
log_timestamp(logfh); /* XXX: what about conversion!? */
fputs(msg, logfh);
} else {
log_timestamp(stdout); /* XXX: what about conversion!? */
fputs(msg, stdout);
}
free(msg);
va_end(args);
}
}
void
die(const char *format, ...)
{
va_list args;
char *msg1;
char *msg2;
va_start(args, format);
msg1 = xvasprintf(format, args);
if (logfh != NULL) {
log_timestamp(logfh);
msg2 = prepare_msg(_("Error: %s"), msg1);
fputs(msg2, logfh);
} else {
log_timestamp(stderr);
msg2 = prepare_msg("%s: %s", program_name, msg1);
fputs(msg2, stderr);
}
free(msg1);
free(msg2);
va_end(args);
finish_logging(false);
exit(EXIT_FAILURE);
}
void
warn(const char *format, ...)
{
va_list args;
char *msg1;
char *msg2;
va_start(args, format);
msg1 = xvasprintf(format, args);
if (logfh != NULL) {
log_timestamp(logfh);
msg2 = prepare_msg(_("Warning: %s"), msg1);
fputs(msg2, logfh);
} else {
log_timestamp(stderr);
msg2 = prepare_msg("%s: %s", program_name, msg1);
fputs(msg2, stderr);
}
free(msg1);
free(msg2);
va_end(args);
}
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