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/* $Id: log.c,v 1.28 2007-12-11 20:21:05 rousseau Exp $ */
/*******************************************************************************
* log.c
* A module of J-Pilot http://jpilot.org
*
* Copyright (C) 1999-2002 by Judd Montgomery
*
* 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; version 2 of the License.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
******************************************************************************/
/*
* Thanks to Jason Day for his patches that allowed plugins to log correctly
*/
#include "config.h"
#include "i18n.h"
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#ifdef USE_FLOCK
#include <sys/file.h>
#else
#include <fcntl.h>
#endif
#include <signal.h>
#include <utime.h>
#include "log.h"
#include "utils.h"
#include "sync.h"
#include "prefs.h"
int pipe_to_parent;
int glob_log_file_mask;
int glob_log_stdout_mask;
int glob_log_gui_mask;
extern void output_to_pane(const char *str);
extern pid_t jpilot_master_pid;
int jp_logf(int level, char *format, ...)
{
va_list val;
int rval;
if (!((level & glob_log_file_mask) ||
(level & glob_log_stdout_mask) ||
(level & glob_log_gui_mask))) {
return EXIT_SUCCESS;
}
va_start(val, format);
rval = jp_vlogf(level, format, val);
va_end(val);
return rval;
}
int jp_vlogf (int level, char *format, va_list val) {
#define WRITE_MAX_BUF 4096
char real_buf[WRITE_MAX_BUF+32];
char *buf, *local_buf;
int size;
int len;
int r;
static FILE *fp=NULL;
static int err_count=0;
char cmd[16];
if (!((level & glob_log_file_mask) ||
(level & glob_log_stdout_mask) ||
(level & glob_log_gui_mask))) {
return EXIT_SUCCESS;
}
if ((!fp) && (err_count>10)) {
return EXIT_FAILURE;
}
if ((!fp) && (err_count==10)) {
fprintf(stderr, _("Unable to open log file, giving up.\n"));
err_count++;
return EXIT_FAILURE;
}
if ((!fp) && (err_count<10)) {
char fullname[FILENAME_MAX];
get_home_file_name(EPN".log", fullname, sizeof(fullname));
fp = fopen(fullname, "w");
if (!fp) {
fprintf(stderr, _("Unable to open log file\n"));
err_count++;
}
}
buf=&(real_buf[16]);
buf[0] = '\0';
size = g_vsnprintf(buf, WRITE_MAX_BUF, format, val);
/* glibc >2.1 can return size > WRITE_MAX_BUF */
/* just in case g_vsnprintf reached the max */
buf[WRITE_MAX_BUF-1] = '\0';
size=strlen(buf);
local_buf = buf;
#ifdef ENABLE_GTK2
/* UTF-8 text so transform in local encoding */
if (g_utf8_validate(buf, -1, NULL))
{
local_buf = g_locale_from_utf8(buf, -1, NULL, NULL, NULL);
if (NULL == local_buf)
local_buf = buf;
}
#endif
if ((fp) && (level & glob_log_file_mask)) {
fwrite(local_buf, size, 1, fp);
fflush(fp);
}
if (level & glob_log_stdout_mask) {
fputs(local_buf, stdout);
}
/* free the buffer is a conversion was used */
if (local_buf != buf)
g_free(local_buf);
if ((pipe_to_parent) && (level & glob_log_gui_mask)) {
/* do not use a pipe for intra-process log
* otherwise we may have a dead lock (jpilot freezes) */
if (getpid() == jpilot_master_pid)
output_to_pane(buf);
else {
sprintf(cmd, "%d:", PIPE_PRINT);
len = strlen(cmd);
buf = buf-len;
strncpy(buf, cmd, len);
size += len;
buf[size]='\0';
buf[size+1]='\n';
size += 2;
r = write(pipe_to_parent, buf, size);
if (r<0)
fprintf(stderr, "write returned error %s %d\n", __FILE__, __LINE__);
}
}
return EXIT_SUCCESS;
}
/*
* This function writes data to the parent process.
* A line feed, or a null must be the last character written.
*/
int write_to_parent(int command, char *format, ...)
{
#define WRITE_MAX_BUF 4096
va_list val;
int len, size;
char real_buf[WRITE_MAX_BUF+32];
char *buf;
char cmd[20];
buf=&(real_buf[16]);
buf[0] = '\0';
va_start(val, format);
g_vsnprintf(buf, WRITE_MAX_BUF, format, val);
/* glibc >2.1 can return size > WRITE_MAX_BUF */
/* just in case g_vsnprintf reached the max */
buf[WRITE_MAX_BUF-1] = '\0';
size=strlen(buf);
va_end(val);
/* This is for jpilot-sync */
if (pipe_to_parent==STDOUT_FILENO) {
if (command==PIPE_PRINT) {
write(pipe_to_parent, buf, strlen(buf));
}
return TRUE;
}
sprintf(cmd, "%d:", command);
len = strlen(cmd);
buf = buf-len;
strncpy(buf, cmd, len);
size += len;
/* The pipe doesn't flush unless a CR is written */
/* This is our key to the parent for a record separator */
buf[size]='\0';
buf[size+1]='\n';
size += 2;
write(pipe_to_parent, buf, size);
return TRUE;
}
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