log.c

#include <sys/errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

int
psircd_log(const char *level, const char *fname, int lineno, const char *fxname, const char *fmt, ...) {
	char *log_prefix = NULL;
	char *log_line = NULL;
	char *log_complete = NULL;
	va_list ap;
	time_t now;
	int ret = -1;

	va_start(ap, fmt);

	now = time(NULL);
	if((time_t)-1 == now)
		goto cleanup;

	ret = asprintf(&log_prefix, "[%.24s] %s - %s:%d, %s",
		ctime(&now), level, fname, lineno, fxname);
	if(-1 == ret)
		goto fail;
	
	ret = vasprintf(&log_line, fmt, ap);
	if(-1 == ret)
		goto fail;

	ret = asprintf(&log_complete, "%s %s", log_prefix, log_line);
	if(-1 == ret)
		goto fail;

	printf("%s", log_complete);

fail:
	if(errno)
		fprintf(stderr, "Logging failed: (%d) %s\n", errno, strerror(errno));

cleanup:
	free(log_prefix);
	free(log_line);
	free(log_complete);

	va_end(ap);

	return ret;
}