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#include <stdarg.h>
#include <sys/socket.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <syslog.h>
#include <time.h>
#include <signal.h>
#include <string.h>
#include "libc.h"
static int lock;
static const char *log_ident;
static int log_opt;
static int log_facility = LOG_USER;
static int log_mask = 0xff;
static FILE *log_f;
int setlogmask(int maskpri)
{
int old = log_mask;
if (maskpri) log_mask = maskpri;
return old;
}
static const struct {
short sun_family;
char sun_path[9];
} log_addr = {
AF_UNIX,
"/dev/log"
};
void closelog(void)
{
LOCK(&lock);
if (log_f) fclose(log_f);
log_f = NULL;
UNLOCK(&lock);
}
static void __openlog(const char *ident, int opt, int facility)
{
int fd;
log_ident = ident;
log_opt = opt;
log_facility = facility;
if (!(opt & LOG_NDELAY) || log_f) return;
fd = socket(AF_UNIX, SOCK_DGRAM, 0);
fcntl(fd, F_SETFD, FD_CLOEXEC);
if (connect(fd, (void *)&log_addr, sizeof(short) + sizeof "/dev/log") < 0)
close(fd);
else log_f = fdopen(fd, "wb");
}
void openlog(const char *ident, int opt, int facility)
{
LOCK(&lock);
__openlog(ident, opt, facility);
UNLOCK(&lock);
}
void syslog(int priority, const char *message, ...)
{
va_list ap;
char timebuf[16];
time_t now;
struct tm tm;
//const char *fmt, *ident, *sep;
//int i;
if (!(log_mask & LOG_MASK(priority&7)) || (priority&~0x3ff)) return;
LOCK(&lock);
if (!log_f) __openlog(log_ident, log_opt | LOG_NDELAY, log_facility);
if (!log_f) {
UNLOCK(&lock);
return;
}
now = time(NULL);
gmtime_r(&now, &tm);
strftime(timebuf, sizeof timebuf, "%b %e %T", &tm);
fprintf(log_f, "<%d>%s ", priority, timebuf);
if (log_ident) fprintf(log_f, "%s", log_ident);
if (log_opt & LOG_PID) fprintf(log_f, "[%d]", getpid());
if (log_ident) fprintf(log_f, ": ");
va_start(ap, message);
vfprintf(log_f, message, ap);
va_end(ap);
fputc(0, log_f);
fflush(log_f);
// Note: LOG_CONS is not supported because it is annoying!!
// syslogd will send messages to console if it deems them appropriate!
UNLOCK(&lock);
}
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