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/*
* support/nfs/xlog.c
*
* This module handles the logging of requests.
*
* TODO: Merge the two "XXX_log() calls.
*
* Authors: Donald J. Becker, <becker@super.org>
* Rick Sladkey, <jrs@world.std.com>
* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
* Olaf Kirch, <okir@monad.swb.de>
*
* This software maybe be used for any purpose provided
* the above copyright notice is retained. It is supplied
* as is, with no warranty expressed or implied.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <unistd.h>
#include <signal.h>
#include <time.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <stdarg.h>
#include <syslog.h>
#include <errno.h>
#include "xlog.h"
#undef VERBOSE_PRINTF
static int log_stderr = 1;
static int log_syslog = 1;
static int logging = 0; /* enable/disable DEBUG logs */
static int logmask = 0; /* What will be logged */
static char log_name[256]; /* name of this program */
static int log_pid = -1; /* PID of this program */
int export_errno = 0;
static void xlog_toggle(int sig);
static struct xlog_debugfac debugnames[] = {
{ "general", D_GENERAL, },
{ "call", D_CALL, },
{ "auth", D_AUTH, },
{ "parse", D_PARSE, },
{ "all", D_ALL, },
{ NULL, 0, },
};
void
xlog_open(char *progname)
{
openlog(progname, LOG_PID, LOG_DAEMON);
strncpy(log_name, progname, sizeof (log_name) - 1);
log_name [sizeof (log_name) - 1] = '\0';
log_pid = getpid();
signal(SIGUSR1, xlog_toggle);
signal(SIGUSR2, xlog_toggle);
}
void
xlog_stderr(int on)
{
log_stderr = on;
}
void
xlog_syslog(int on)
{
log_syslog = on;
}
static void
xlog_toggle(int sig)
{
unsigned int tmp, i;
if (sig == SIGUSR1) {
if ((logmask & D_ALL) && !logging) {
xlog(D_GENERAL, "turned on logging");
logging = 1;
return;
}
tmp = ~logmask;
logmask |= ((logmask & D_ALL) << 1) | D_GENERAL;
for (i = -1, tmp &= logmask; tmp; tmp >>= 1, i++)
if (tmp & 1)
xlog(D_GENERAL,
"turned on logging level %d", i);
} else {
xlog(D_GENERAL, "turned off logging");
logging = 0;
}
signal(sig, xlog_toggle);
}
void
xlog_config(int fac, int on)
{
if (on)
logmask |= fac;
else
logmask &= ~fac;
if (on)
logging = 1;
}
void
xlog_sconfig(char *kind, int on)
{
struct xlog_debugfac *tbl = debugnames;
while (tbl->df_name != NULL && strcasecmp(tbl->df_name, kind))
tbl++;
if (!tbl->df_name) {
xlog (L_WARNING, "Invalid debug facility: %s\n", kind);
return;
}
xlog_config(tbl->df_fac, on);
}
int
xlog_enabled(int fac)
{
return (logging && (fac & logmask));
}
/* Write something to the system logfile and/or stderr */
void
xlog_backend(int kind, const char *fmt, va_list args)
{
va_list args2;
if (!(kind & (L_ALL)) && !(logging && (kind & logmask)))
return;
if (log_stderr)
va_copy(args2, args);
if (log_syslog) {
switch (kind) {
case L_FATAL:
vsyslog(LOG_ERR, fmt, args);
break;
case L_ERROR:
vsyslog(LOG_ERR, fmt, args);
break;
case L_WARNING:
vsyslog(LOG_WARNING, fmt, args);
break;
case L_NOTICE:
vsyslog(LOG_NOTICE, fmt, args);
break;
default:
if (!log_stderr)
vsyslog(LOG_INFO, fmt, args);
break;
}
}
if (log_stderr) {
#ifdef VERBOSE_PRINTF
time_t now;
struct tm *tm;
time(&now);
tm = localtime(&now);
fprintf(stderr, "%s[%d] %04d-%02d-%02d %02d:%02d:%02d ",
log_name, log_pid,
tm->tm_year+1900, tm->tm_mon + 1, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec);
#else
fprintf(stderr, "%s: ", log_name);
#endif
vfprintf(stderr, fmt, args2);
fprintf(stderr, "\n");
va_end(args2);
}
if (kind == L_FATAL)
exit(1);
}
void
xlog(int kind, const char* fmt, ...)
{
va_list args;
if (kind & (L_ERROR|D_GENERAL))
export_errno = 1;
va_start(args, fmt);
xlog_backend(kind, fmt, args);
va_end(args);
}
void
xlog_warn(const char* fmt, ...)
{
va_list args;
va_start(args, fmt);
xlog_backend(L_WARNING, fmt, args);
va_end(args);
}
void
xlog_err(const char* fmt, ...)
{
va_list args;
va_start(args, fmt);
xlog_backend(L_FATAL, fmt, args);
va_end(args);
}
void
xlog_errno(int err, const char *fmt, ...)
{
va_list args;
errno = err;
va_start(args, fmt);
xlog_backend(L_FATAL, fmt, args);
va_end(args);
}
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