Refactor, move logit() and log macros to log.c + log.h

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

src/log.c

@@ -0,0 +1,75 @@
+/* Finit daemon log functions
+ *
+ * Copyright (c) 2008-2017  Joachim Nilsson <troglobit@gmail.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <lite/lite.h>
+
+#include "finit.h"
+#include "log.h"
+
+
+/*
+ * Log to /dev/kmsg until syslogd has started, then openlog()
+ * and continue logging as a regular daemon.
+ */
+void logit(int prio, const char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+    if (!_slup && !fexist("/dev/log")) {
+	    FILE *fp;
+
+	    fp = fopen("/dev/kmsg", "w");
+	    if (fp) {
+		    if (debug)
+			    prio = LOG_ERR;
+
+		    fprintf(fp, "<%d>finit[1]:", LOG_DAEMON | prio);
+		    vfprintf(fp, fmt, ap);
+		    fclose(fp);
+	    } else {
+		    fprintf(stderr, "Failed opening /dev/kmsg for appending ...\n");
+		    if (debug || prio <= LOG_ERR)
+			    vfprintf(stderr, fmt, ap);
+	    }
+	    va_end(ap);
+	    return;
+    }
+
+    if (!_slup) {
+	    openlog("finit", LOG_PID, LOG_DAEMON);
+	    _slup = 1;
+    }
+
+    vsyslog(prio, fmt, ap);
+    va_end(ap);
+}
+
+/**
+ * Local Variables:
+ *  indent-tabs-mode: t
+ *  c-file-style: "linux"
+ * End:
+ */