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/* ============================================================================
* << File: log.c >>
* -----------------
* Author: Emiliano Castagnari (aka Torian) <ecastag@fi.uba.ar>
* Diego Essaya <dessaya@fi.uba.ar>
* Date: 29/12/03
*
* Description:
* Functions for server logging.
* ============================================================================
* ============================================================================
*
* ChangeLog: View Changelog
*
* ============================================================================
* Copyright (C) 2003, 2004 Diego Essaya, Emiliano Castagnari
*
* This file is part of gems.
*
* gems 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.
*
* gems 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
* ============================================================================
*/
#include <stdarg.h> /* variable parameter functions */
#include <time.h> /* time_t */
#include <syslog.h> /* syslog() */
#include <string.h> /* strlen() */
#include "version_server.h"
#include "log.h"
/* Global variables defining where to log: */
log_opt_t logdest = G_LOG_NOLOG;
char *logfile = NULL;
t_log mesg_log[] =
{
{ERR_NOT_OPT, LOG_ERR, N_("Invalid option: %s.")},
{ERR_OPT_WO_ARG, LOG_ERR, N_("Option %s requires an argument.")},
{ERR_PORT, LOG_ERR, N_("Invalid TCP port.")},
{ERR_MAXCONN, LOG_ERR, N_("Invalid value for maximum number of"
" connections.")},
{ERR_WAIT, LOG_ERR, N_("Invalid value for 'wait' option.")},
{ERR_MEMORY, LOG_ERR, N_("Not enough memory.")},
{ERR_LOCK, LOG_ERR, N_("Cannot create lock file: %s\n"
" Maybe another instance of %s is running?")},
{ERR_INTERNAL, LOG_ERR, N_("Aaargh! Internal error -- sorry.")},
{LOG_SOCK_C, LOG_INFO, N_("Accepting connections on port %d.")},
{LOG_NEW_C, LOG_INFO, N_("New connection -- Client %i -- "
"IP: %s.")},
{LOG_CLOSE_C, LOG_INFO, N_("Client disconnection -- IP: %s.")},
{LOG_CLOSING_ALL, LOG_INFO, N_("Closing all connections...")},
{LOG_MAXCONN, LOG_INFO, N_("Connection refused: maximum number "
"of connections reached.")},
{LOG_SERVER_VERSION,LOG_INFO, N_("Connection refused: obsolete server "
"version.")},
{LOG_CLIENT_VERSION,LOG_INFO, N_("Connection refused: obsolete client "
"version.")},
{LOG_WINSIZE, LOG_INFO, N_("Client disconnected: terminal size "
"too small.")},
{LOG_RUNSCRIPT, LOG_INFO, N_("Running %s...")},
{LOG_ENDSCRIPT, LOG_INFO, N_("script terminated.")},
{DEBUG_ADD_C, LOG_DEBUG,
" # DEBUG | add_client(): client->prev[%p] | client[%p] | client->next[%p]"},
{DEBUG_DEL_C, LOG_DEBUG,
" # DEBUG | del_client(): client->prev[%p] | client[%p] | client->next[%p]"},
{DEBUG_SEND_C, LOG_DEBUG, " # DEBUG | send_2client(): "}
};
/*****************************************************************************
* g_set_logfile()
*
* Specifies where the logs wil be written to.
* If _logdest == G_LOG_FILE, another argument is expected (filename).
*/
void g_set_logdest(log_opt_t _logdest, ...)
{
va_list va;
logdest = _logdest;
va_start(va, _logdest);
if (logdest == G_LOG_FILE) logfile = va_arg(va, char *);
else logfile = NULL;
va_end(va);
if (logdest == G_LOG_SYSLOG) openlog(APPNAME, LOG_PID, LOG_USER);
}
/*****************************************************************************
* g_log()
*
* Logging function.
* In case of not writing to syslog, the format of the produced log is:
*
* APPNAME [DATE]: mesg_log[errno]
*
* where 'APPNAME' is the name of the program, 'DATE' is the value returned
* by the 'g_time()' function, and 'mesg_log[errno]' is the message string.
*
* The extra arguments are passed to vsprintf(). */
void g_log(short int errno, ...)
{
char string[255]; /* Container for the formatted message */
va_list va;
FILE *fd_log = NULL;
/* Validation of the errno argument: */
if (errno >= sizeof(mesg_log) || errno < 0)
errno = ERR_INTERNAL;
/* Format message string + variable arguments into the "string" array */
va_start(va, errno);
vsprintf(string, _(mesg_log[errno].log_str), va);
va_end(va);
if (logdest == G_LOG_SYSLOG) /* use syslog */
{
syslog(mesg_log[errno].priority, string);
}
else if (logdest != G_LOG_NOLOG) /* log to stderr or a file: */
{
if ((logdest == G_LOG_FILE) && (logfile))
{
fd_log = fopen(logfile, "a");
}
fprintf((fd_log == NULL) ? stderr : fd_log, APPNAME" [%s]: %s\n",
g_time(), string);
if (fd_log != NULL) fclose(fd_log);
}
/* If we have an error message, write it to stderr (if not done yet): */
if ((mesg_log[errno].priority == LOG_ERR) && (logdest != G_LOG_STDERR))
{
fprintf(stderr, APPNAME": %s\n", string);
}
}
/*****************************************************************************/
/* Return the actual time & date, in string format. */
char *g_time(void)
{
time_t time_utc; /* UTC formatted date */
struct tm time_fmt; /* Time data structure */
char *time_str;
time_utc = time(NULL);
time_fmt = (*localtime(&time_utc));
time_str = asctime(&time_fmt);
time_str[strlen(time_str) - 1] = '\0';
return time_str;
}
/* vim: set ts=4 sw=4: */
|
