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#include <printf.h>
#include <stdarg.h>
#include <stdio.h>
#include <time.h>
#include <assert.h>
#include <syslog.h>
#include <errno.h>
#include <string.h>
#include <stdbool.h>
#include <unistd.h>
char *logfile = NULL;
int use_syslog = 0;
int loglevel = 2;
static FILE * log_fd;
extern bool daemonized;
void logger(int level, const char *fmt, ...) {
char text[2048], timestamp[256];
time_t t;
struct tm * ti;
if((loglevel == 0) ||
(loglevel == 1 && (level != LOG_ERR)) ||
(loglevel == 2 && (level != LOG_ERR && level != LOG_NOTICE)) ||
(loglevel == 3 && (level == LOG_DEBUG)))
return;
time(&t);
ti = localtime(&t);
strftime(timestamp, sizeof(timestamp), "[%X %x]", ti);
va_list args;
va_start(args, fmt);
vsnprintf(text, sizeof(text), fmt, args);
va_end(args);
if(log_fd) {
fprintf(log_fd, "%s %s\n", timestamp, text);
fflush(log_fd);
}
if(use_syslog)
syslog(level, "%s", text);
if(!daemonized) {
FILE *out;
if(level == LOG_ERR || level == LOG_NOTICE)
out = stderr;
else
out = stdout;
/*
* Do not log timestamps if output is not interactive
* (e.g. if we are running under systemd-supervision and
* output is sent to syslog anyway)
*/
if(isatty(STDOUT_FILENO))
fprintf(out, "%s %s\n", timestamp, text);
else
fprintf(out, "%s\n", text);
}
}
int init_log(void) {
if(logfile) {
log_fd = fopen(logfile, "a");
if(!log_fd)
fprintf(stderr, "Unable to open logfile %s: %s\n", logfile,
strerror(errno));
}
if(use_syslog)
openlog("tvoe", 0, LOG_DAEMON);
return 0;
}
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