X-Git-Url: https://the.earth.li/gitweb/?a=blobdiff_plain;f=log.c;fp=log.c;h=5d067bc7f606f71ea119ec4b1f854b0c88f42fdd;hb=3b5b9db0bc2dbe93b3b79e722997606c71ecafb9;hp=0000000000000000000000000000000000000000;hpb=62c94dacbe471278972813b59776a5fadbd8a543;p=onak.git

diff --git a/log.c b/log.c
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+/*
+ * log.c - Simple logging framework.
+ *
+ * Jonathan McDowell <noodles@earth.li>
+ *
+ * Copyright 2003 Project Purple
+ */
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "log.h"
+
+/*
+ *	logthres - holds the minimum log level we'll output
+ *
+ *	This variable keeps track of the threshold we've set for outputting
+ *	logs - if we're asked to log something below this level we won't output
+ *	it.
+ */
+static loglevels logthres = LOGTHING_DEBUG;
+
+/*
+ *	logappname - the name of the application using us.
+ *
+ *	This holds information about the name of the application we're being
+ *	called by. It's set when we're initialized.
+ */
+static char *logappname = NULL;
+
+/*
+ *	logfilename - the file to log to.
+ *
+ *	The full name and path of the file we should log to.
+ */
+static char *logfilename = NULL;
+
+/*
+ *	initlogthing - initialize the logging module
+ *	@appname: The application name to use in the log.
+ *	@filename: The filename to log to. NULL means stderr.
+ *
+ *      This function sets up the logging module ready to log. The appname is
+ *      written as part of every log entry and the filename is the file we
+ *      should log to. If the appname is NULL then none is written. If the
+ *      filename is NULL all output is sent to stderr.
+ */
+int initlogthing(const char *appname, const char *filename)
+{
+	if (appname != NULL) {
+		logappname = strdup(appname);
+	}
+
+	if (filename != NULL) {
+		logfilename = strdup(filename);
+	}
+
+	return 0;
+}
+
+/*
+ *	cleanuplogthing - clean up the logging module
+ *
+ *      This function cleans up the logging module after use.
+ */
+void cleanuplogthing(void)
+{
+	if (logappname != NULL) {
+		free(logappname);
+		logappname = NULL;
+	}
+
+	if (logfilename != NULL) {
+		free(logfilename);
+		logfilename = NULL;
+	}
+
+	return;
+}
+
+/*
+ *	setlogthreshold - set the threshold for log output
+ *	@loglevel: The minimum log level we should output
+ *
+ *	Sets the threshold for log output; anything logged with a log level
+ *	lower than this will be silently dropped. Returns the old log threshold
+ *	value.
+ */
+loglevels setlogthreshold(loglevels loglevel)
+{
+	loglevels oldlevel;
+
+	oldlevel = logthres;
+	logthres = loglevel;
+
+	return oldlevel;
+}
+
+/*
+ *	logthing - output a log entry
+ *      @loglevel: The level of the log.
+ *      @format: A format string, followed by any parameters required.
+ *
+ *	This function outputs a log entry. A leading time/date stamp and a
+ *	trailing newline are automatically added. The loglevel is compared to
+ *	the current log threshold and if equal or above the log entry is
+ *	output. The format parameter is of the same nature as that used in
+ *	printf.
+ */
+int logthing(loglevels loglevel, const char *format, ...)
+{
+	FILE      *logfile = NULL;
+	struct tm *timestamp = NULL;
+	time_t     timer = 0;
+	va_list    ap;
+
+	if (loglevel >= logthres) {
+		timer = time(NULL);
+		timestamp = localtime(&timer);
+
+		if (logfilename != NULL) {
+			logfile = fopen(logfilename, "a");
+			flockfile(logfile);
+		} else {
+			logfile = stderr;
+		}
+	
+		fprintf(logfile, "[%02d/%02d/%4d %02d:%02d:%02d] %s[%d]: ",
+				timestamp->tm_mday,
+				timestamp->tm_mon,
+				timestamp->tm_year + 1900,
+				timestamp->tm_hour,
+				timestamp->tm_min,
+				timestamp->tm_sec,
+				(logappname == NULL) ? "" : logappname,
+				getpid());
+		va_start(ap, format);
+		vfprintf(logfile, format, ap);
+		va_end(ap);
+		fprintf(logfile, "\n");
+
+
+		if (logfilename != NULL) {
+			funlockfile(logfile);
+			fclose(logfile);
+			logfile = NULL;
+		}
+	}
+
+	return 0;
+}