Initial import to CVS. Basic functions are working, albeit with a couple of showstopper memory bugs and many missing features. Detaching, reattaching, creating new sessions, listing sessions work acceptably for using with shells. Simple curses programs (top, systat, tetris) and more complicated ones (mutt, emacs) that don't require scrolling regions (ESC[r) mostly work fine (including mutt, emacs). No status bar yet and no key remapping or other customisation.

log.c

@@ -0,0 +1,218 @@
+/* $Id: log.c,v 1.1.1.1 2007-07-09 19:03:33 nicm Exp $ */
+
+/*
+ * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
+ * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+
+#include "tmux.h"
+
+/* Logging enabled. */
+int	 log_enabled;
+
+/* Log stream or NULL to use syslog. */
+FILE	*log_stream;
+
+/* Debug level. */
+int	 log_level;
+
+/* Open log. */
+void
+log_open(FILE *f, int facility, int level)
+{
+	log_stream = f;
+	log_level = level;
+
+	if (f == NULL)
+		openlog(__progname, LOG_PID|LOG_NDELAY, facility);
+	tzset();
+
+	log_enabled = 1;
+}
+
+/* Close logging. */
+void
+log_close(void)
+{
+	if (log_stream != NULL)
+		fclose(log_stream);
+
+	log_enabled = 0;
+}
+
+/* Write a log message. */
+void
+log_write(FILE *f, int priority, const char *fmt, ...)
+{
+	va_list	ap;
+
+	va_start(ap, fmt);
+	log_vwrite(f, priority, fmt, ap);
+	va_end(ap);
+}
+
+/* Write a log message. */
+void
+log_vwrite(FILE *f, int priority, const char *fmt, va_list ap)
+{
+	if (!log_enabled)
+		return;
+
+	if (f == NULL) {
+		vsyslog(priority, fmt, ap);
+		return;
+	}
+
+	if (vfprintf(f, fmt, ap) == -1)
+		exit(1);
+	if (fputc('\n', f) == EOF)
+		exit(1);
+	fflush(log_stream);
+}
+
+/* Log a warning with error string. */
+void printflike1
+log_warn(const char *msg, ...)
+{
+	va_list	 ap;
+	char	*fmt;
+
+	if (!log_enabled)
+		return;
+
+	va_start(ap, msg);
+	if (asprintf(&fmt, "%s: %s", msg, strerror(errno)) == -1)
+		exit(1);
+	log_vwrite(log_stream, LOG_CRIT, fmt, ap);
+	xfree(fmt);
+	va_end(ap);
+}
+
+/* Log a warning. */
+void printflike1
+log_warnx(const char *msg, ...)
+{
+	va_list	ap;
+
+	va_start(ap, msg);
+	log_vwrite(log_stream, LOG_CRIT, msg, ap);
+	va_end(ap);
+}
+
+/* Log an informational message. */
+void printflike1
+log_info(const char *msg, ...)
+{
+	va_list	ap;
+
+	if (log_level > -1) {
+		va_start(ap, msg);
+		if (log_stream == stderr)
+			log_vwrite(stdout, LOG_INFO, msg, ap);
+		else
+			log_vwrite(log_stream, LOG_INFO, msg, ap);
+		va_end(ap);
+	}
+}
+
+/* Log a debug message. */
+void printflike1
+log_debug(const char *msg, ...)
+{
+	va_list	ap;
+
+	if (log_level > 0) {
+		va_start(ap, msg);
+		log_vwrite(log_stream, LOG_DEBUG, msg, ap);
+		va_end(ap);
+	}
+}
+
+/* Log a debug message at level 2. */
+void printflike1
+log_debug2(const char *msg, ...)
+{
+	va_list	ap;
+
+	if (log_level > 1) {
+		va_start(ap, msg);
+		log_vwrite(log_stream, LOG_DEBUG, msg, ap);
+		va_end(ap);
+	}
+}
+
+/* Log a debug message at level 3. */
+void printflike1
+log_debug3(const char *msg, ...)
+{
+	va_list	ap;
+
+	if (log_level > 2) {
+		va_start(ap, msg);
+		log_vwrite(log_stream, LOG_DEBUG, msg, ap);
+		va_end(ap);
+	}
+}
+
+/* Log a critical error, with error string if necessary, and die. */
+__dead void
+log_vfatal(const char *msg, va_list ap)
+{
+	char	*fmt;
+
+	if (!log_enabled)
+		exit(1);
+
+	if (errno != 0) {
+		if (asprintf(&fmt, "fatal: %s: %s", msg, strerror(errno)) == -1)
+			exit(1);
+		log_vwrite(log_stream, LOG_CRIT, fmt, ap);
+	} else {
+		if (asprintf(&fmt, "fatal: %s", msg) == -1)
+			exit(1);
+		log_vwrite(log_stream, LOG_CRIT, fmt, ap);
+	}
+	xfree(fmt);
+
+	exit(1);
+}
+
+/* Log a critical error, with error string, and die. */
+__dead void
+log_fatal(const char *msg, ...)
+{
+	va_list	ap;
+
+	va_start(ap, msg);
+	log_vfatal(msg, ap);
+}
+
+/* Log a critical error and die. */
+__dead void
+log_fatalx(const char *msg, ...)
+{
+	va_list	ap;
+
+	errno = 0;
+	va_start(ap, msg);
+	log_vfatal(msg, ap);
+}