Introduce src, obj, build, docs & modify Makefile

src/log.c

@@ -0,0 +1,77 @@
+#include <time.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <pthread.h>
+#include <openssl/err.h>
+#include "log.h"
+#include "confparser.h"
+
+static FILE *fderr;
+static FILE *fdout;
+static pthread_once_t once = PTHREAD_ONCE_INIT;
+static pthread_once_t init_once = PTHREAD_ONCE_INIT;
+
+static void open_logs(void)
+{
+	if ((fderr = fopen(conf.rmps.errlog, "a")) == NULL)
+		fderr = stderr;
+	else
+		setvbuf(fderr, NULL, _IOLBF, 0);
+	if ((fdout = fopen(conf.rmps.logfile, "a")) == NULL)
+		fdout = stdout;
+	else
+		setvbuf(fdout, NULL, _IOLBF, 0);
+}
+
+void log_ssl(void)
+{
+	ERR_print_errors_fp(fderr);
+	fflush(fderr);
+}
+
+static void set_fpts(void)
+{
+	fderr = stderr;
+	fdout = stdout;
+}
+
+void log(enum LOG_LEVEL lvl, char *fmt, ...)
+{
+	char fmt_with_pfx[1024];
+
+	pthread_once(&init_once, set_fpts);
+	if (conf.isvalid)
+		pthread_once(&once, open_logs);
+	if (lvl <= conf.rmps.loglevel) {
+		va_list list;
+		FILE *fp;
+
+		static const char * const prefixes[] = {
+			"ERROR", "WARNING", "INFO", "VERBOSE"
+		};
+		time_t t = time(NULL);
+		struct tm tm;
+
+		localtime_r(&t, &tm);
+		if (lvl == ERROR || lvl == WARNING)
+			fp = fderr;
+		else
+			fp = fdout;
+		snprintf(fmt_with_pfx,
+			sizeof(fmt_with_pfx),
+			"[%d-%02d-%02d %02d:%02d:%02d] %s: %s\n",
+			tm.tm_year + 1900,
+			tm.tm_mon + 1,
+			tm.tm_mday,
+			tm.tm_hour,
+			tm.tm_min,
+			tm.tm_sec,
+			prefixes[lvl-1],
+			fmt);
+
+		va_start(list, fmt);
+		vfprintf(fp, fmt_with_pfx, list);
+		va_end(list);
+	}
+}
+