Import tmux, a terminal multiplexor allowing (among other things) a single

terminal to be switched between several different windows and programs
displayed on one terminal be detached from one terminal and moved to another.

ok deraadt pirofti

1 files changed, 250 insertions, 0 deletions

diff --git a/log.c b/log.c
new file mode 100644
index 00000000..b4a612d5
--- /dev/null
+++ b/log.c
@@ -0,0 +1,250 @@
+/* $OpenBSD$ */
+
+/*
+ * 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 <time.h>
+
+#include "tmux.h"
+
+/* Logging type. */
+#define LOG_TYPE_OFF 0
+#define LOG_TYPE_SYSLOG 1
+#define LOG_TYPE_TTY 2
+#define LOG_TYPE_FILE 3
+int	log_type = LOG_TYPE_OFF;
+
+/* Log file, if needed. */
+FILE   *log_file;
+
+/* Debug level. */
+int	log_level;
+
+/* Open logging to syslog. */
+void
+log_open_syslog(int level)
+{
+	log_type = LOG_TYPE_SYSLOG;
+	log_level = level;
+
+	openlog(__progname, LOG_PID|LOG_NDELAY, LOG_FACILITY);
+
+	tzset();
+}
+
+/* Open logging to tty. */
+void
+log_open_tty(int level)
+{
+	log_type = LOG_TYPE_TTY;
+	log_level = level;
+
+	setlinebuf(stderr);
+	setlinebuf(stdout);
+
+	tzset();
+}
+
+/* Open logging to file. */
+void
+log_open_file(int level, const char *path)
+{
+	log_file = fopen(path, "w");
+	if (log_file == NULL)
+		return;
+
+	log_type = LOG_TYPE_FILE;
+	log_level = level;
+
+	setlinebuf(log_file);
+
+	tzset();
+}
+
+/* Close logging. */
+void
+log_close(void)
+{
+	if (log_type == LOG_TYPE_FILE)
+		fclose(log_file);
+
+	log_type = LOG_TYPE_OFF;
+}
+
+/* Write a log message. */
+void
+log_write(int pri, const char *msg, ...)
+{
+	va_list	ap;
+
+	va_start(ap, msg);
+	log_vwrite(pri, msg, ap);
+	va_end(ap);
+}
+
+/* Write a log message. */
+void
+log_vwrite(int pri, const char *msg, va_list ap)
+{
+	char	*fmt;
+	FILE	*f = log_file;
+
+	switch (log_type) {
+	case LOG_TYPE_SYSLOG:
+		vsyslog(pri, msg, ap);
+		break;
+	case LOG_TYPE_TTY:
+		if (pri == LOG_INFO)
+			f = stdout;
+		else
+			f = stderr;
+		/* FALLTHROUGH */
+	case LOG_TYPE_FILE:
+		if (asprintf(&fmt, "%s\n", msg) == -1)
+			exit(1);
+		if (vfprintf(f, fmt, ap) == -1)
+			exit(1);
+		fflush(f);
+		free(fmt);
+		break;
+	}
+}
+
+/* Log a warning with error string. */
+void printflike1
+log_warn(const char *msg, ...)
+{
+	va_list	 ap;
+	char	*fmt;
+
+	va_start(ap, msg);
+	if (asprintf(&fmt, "%s: %s", msg, strerror(errno)) == -1)
+		exit(1);
+	log_vwrite(LOG_CRIT, fmt, ap);
+	free(fmt);
+	va_end(ap);
+}
+
+/* Log a warning. */
+void printflike1
+log_warnx(const char *msg, ...)
+{
+	va_list	ap;
+
+	va_start(ap, msg);
+	log_vwrite(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);
+		log_vwrite(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_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_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_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 (errno != 0) {
+		if (asprintf(&fmt, "fatal: %s: %s", msg, strerror(errno)) == -1)
+			exit(1);
+		log_vwrite(LOG_CRIT, fmt, ap);
+	} else {
+		if (asprintf(&fmt, "fatal: %s", msg) == -1)
+       			exit(1);
+		log_vwrite(LOG_CRIT, fmt, ap);
+	}
+	free(fmt);
+
+	exit(1);
+}
+
+/* Log a critical error, with error string, and die. */
+__dead void printflike1
+log_fatal(const char *msg, ...)
+{
+	va_list	ap;
+
+	va_start(ap, msg);
+	log_vfatal(msg, ap);
+}
+
+/* Log a critical error and die. */
+__dead void printflike1
+log_fatalx(const char *msg, ...)
+{
+	va_list	ap;
+
+	errno = 0;
+	va_start(ap, msg);
+	log_vfatal(msg, ap);
+}