Properly flatten openssh/dist.

1 files changed, 376 insertions, 0 deletions

diff --git a/log.c b/log.c
new file mode 100644
index 0000000..7f88674
--- /dev/null
+++ b/log.c
@@ -0,0 +1,376 @@
+/* $OpenBSD: log.c,v 1.39 2006/08/18 09:13:25 deraadt Exp $ */
+/*
+ * Author: Tatu Ylonen <ylo@cs.hut.fi>
+ * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
+ *                    All rights reserved
+ *
+ * As far as I am concerned, the code I have written for this software
+ * can be used freely for any purpose.  Any derived versions of this
+ * software must be clearly marked as such, and if the derived work is
+ * incompatible with the protocol description in the RFC file, it must be
+ * called by a name other than "ssh" or "Secure Shell".
+ */
+/*
+ * Copyright (c) 2000 Markus Friedl.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "includes.h"
+
+#include <sys/types.h>
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <unistd.h>
+#if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H)
+# include <vis.h>
+#endif
+
+#include "xmalloc.h"
+#include "log.h"
+
+static LogLevel log_level = SYSLOG_LEVEL_INFO;
+static int log_on_stderr = 1;
+static int log_facility = LOG_AUTH;
+static char *argv0;
+
+extern char *__progname;
+
+#define LOG_SYSLOG_VIS	(VIS_CSTYLE|VIS_NL|VIS_TAB|VIS_OCTAL)
+#define LOG_STDERR_VIS	(VIS_SAFE|VIS_OCTAL)
+
+/* textual representation of log-facilities/levels */
+
+static struct {
+	const char *name;
+	SyslogFacility val;
+} log_facilities[] = {
+	{ "DAEMON",	SYSLOG_FACILITY_DAEMON },
+	{ "USER",	SYSLOG_FACILITY_USER },
+	{ "AUTH",	SYSLOG_FACILITY_AUTH },
+#ifdef LOG_AUTHPRIV
+	{ "AUTHPRIV",	SYSLOG_FACILITY_AUTHPRIV },
+#endif
+	{ "LOCAL0",	SYSLOG_FACILITY_LOCAL0 },
+	{ "LOCAL1",	SYSLOG_FACILITY_LOCAL1 },
+	{ "LOCAL2",	SYSLOG_FACILITY_LOCAL2 },
+	{ "LOCAL3",	SYSLOG_FACILITY_LOCAL3 },
+	{ "LOCAL4",	SYSLOG_FACILITY_LOCAL4 },
+	{ "LOCAL5",	SYSLOG_FACILITY_LOCAL5 },
+	{ "LOCAL6",	SYSLOG_FACILITY_LOCAL6 },
+	{ "LOCAL7",	SYSLOG_FACILITY_LOCAL7 },
+	{ NULL,		SYSLOG_FACILITY_NOT_SET }
+};
+
+static struct {
+	const char *name;
+	LogLevel val;
+} log_levels[] =
+{
+	{ "QUIET",	SYSLOG_LEVEL_QUIET },
+	{ "FATAL",	SYSLOG_LEVEL_FATAL },
+	{ "ERROR",	SYSLOG_LEVEL_ERROR },
+	{ "INFO",	SYSLOG_LEVEL_INFO },
+	{ "VERBOSE",	SYSLOG_LEVEL_VERBOSE },
+	{ "DEBUG",	SYSLOG_LEVEL_DEBUG1 },
+	{ "DEBUG1",	SYSLOG_LEVEL_DEBUG1 },
+	{ "DEBUG2",	SYSLOG_LEVEL_DEBUG2 },
+	{ "DEBUG3",	SYSLOG_LEVEL_DEBUG3 },
+	{ NULL,		SYSLOG_LEVEL_NOT_SET }
+};
+
+SyslogFacility
+log_facility_number(char *name)
+{
+	int i;
+
+	if (name != NULL)
+		for (i = 0; log_facilities[i].name; i++)
+			if (strcasecmp(log_facilities[i].name, name) == 0)
+				return log_facilities[i].val;
+	return SYSLOG_FACILITY_NOT_SET;
+}
+
+LogLevel
+log_level_number(char *name)
+{
+	int i;
+
+	if (name != NULL)
+		for (i = 0; log_levels[i].name; i++)
+			if (strcasecmp(log_levels[i].name, name) == 0)
+				return log_levels[i].val;
+	return SYSLOG_LEVEL_NOT_SET;
+}
+
+/* Error messages that should be logged. */
+
+void
+error(const char *fmt,...)
+{
+	va_list args;
+
+	va_start(args, fmt);
+	do_log(SYSLOG_LEVEL_ERROR, fmt, args);
+	va_end(args);
+}
+
+void
+sigdie(const char *fmt,...)
+{
+#ifdef DO_LOG_SAFE_IN_SIGHAND
+	va_list args;
+
+	va_start(args, fmt);
+	do_log(SYSLOG_LEVEL_FATAL, fmt, args);
+	va_end(args);
+#endif
+	_exit(1);
+}
+
+
+/* Log this message (information that usually should go to the log). */
+
+void
+logit(const char *fmt,...)
+{
+	va_list args;
+
+	va_start(args, fmt);
+	do_log(SYSLOG_LEVEL_INFO, fmt, args);
+	va_end(args);
+}
+
+/* More detailed messages (information that does not need to go to the log). */
+
+void
+verbose(const char *fmt,...)
+{
+	va_list args;
+
+	va_start(args, fmt);
+	do_log(SYSLOG_LEVEL_VERBOSE, fmt, args);
+	va_end(args);
+}
+
+/* Debugging messages that should not be logged during normal operation. */
+
+void
+debug(const char *fmt,...)
+{
+	va_list args;
+
+	va_start(args, fmt);
+	do_log(SYSLOG_LEVEL_DEBUG1, fmt, args);
+	va_end(args);
+}
+
+void
+debug2(const char *fmt,...)
+{
+	va_list args;
+
+	va_start(args, fmt);
+	do_log(SYSLOG_LEVEL_DEBUG2, fmt, args);
+	va_end(args);
+}
+
+void
+debug3(const char *fmt,...)
+{
+	va_list args;
+
+	va_start(args, fmt);
+	do_log(SYSLOG_LEVEL_DEBUG3, fmt, args);
+	va_end(args);
+}
+
+/*
+ * Initialize the log.
+ */
+
+void
+log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
+{
+#if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
+	struct syslog_data sdata = SYSLOG_DATA_INIT;
+#endif
+
+	argv0 = av0;
+
+	switch (level) {
+	case SYSLOG_LEVEL_QUIET:
+	case SYSLOG_LEVEL_FATAL:
+	case SYSLOG_LEVEL_ERROR:
+	case SYSLOG_LEVEL_INFO:
+	case SYSLOG_LEVEL_VERBOSE:
+	case SYSLOG_LEVEL_DEBUG1:
+	case SYSLOG_LEVEL_DEBUG2:
+	case SYSLOG_LEVEL_DEBUG3:
+		log_level = level;
+		break;
+	default:
+		fprintf(stderr, "Unrecognized internal syslog level code %d\n",
+		    (int) level);
+		exit(1);
+	}
+
+	log_on_stderr = on_stderr;
+	if (on_stderr)
+		return;
+
+	switch (facility) {
+	case SYSLOG_FACILITY_DAEMON:
+		log_facility = LOG_DAEMON;
+		break;
+	case SYSLOG_FACILITY_USER:
+		log_facility = LOG_USER;
+		break;
+	case SYSLOG_FACILITY_AUTH:
+		log_facility = LOG_AUTH;
+		break;
+#ifdef LOG_AUTHPRIV
+	case SYSLOG_FACILITY_AUTHPRIV:
+		log_facility = LOG_AUTHPRIV;
+		break;
+#endif
+	case SYSLOG_FACILITY_LOCAL0:
+		log_facility = LOG_LOCAL0;
+		break;
+	case SYSLOG_FACILITY_LOCAL1:
+		log_facility = LOG_LOCAL1;
+		break;
+	case SYSLOG_FACILITY_LOCAL2:
+		log_facility = LOG_LOCAL2;
+		break;
+	case SYSLOG_FACILITY_LOCAL3:
+		log_facility = LOG_LOCAL3;
+		break;
+	case SYSLOG_FACILITY_LOCAL4:
+		log_facility = LOG_LOCAL4;
+		break;
+	case SYSLOG_FACILITY_LOCAL5:
+		log_facility = LOG_LOCAL5;
+		break;
+	case SYSLOG_FACILITY_LOCAL6:
+		log_facility = LOG_LOCAL6;
+		break;
+	case SYSLOG_FACILITY_LOCAL7:
+		log_facility = LOG_LOCAL7;
+		break;
+	default:
+		fprintf(stderr,
+		    "Unrecognized internal syslog facility code %d\n",
+		    (int) facility);
+		exit(1);
+	}
+
+	/*
+	 * If an external library (eg libwrap) attempts to use syslog
+	 * immediately after reexec, syslog may be pointing to the wrong
+	 * facility, so we force an open/close of syslog here.
+	 */
+#if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
+	openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata);
+	closelog_r(&sdata);
+#else
+	openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
+	closelog();
+#endif
+}
+
+#define MSGBUFSIZ 1024
+
+void
+do_log(LogLevel level, const char *fmt, va_list args)
+{
+#if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
+	struct syslog_data sdata = SYSLOG_DATA_INIT;
+#endif
+	char msgbuf[MSGBUFSIZ];
+	char fmtbuf[MSGBUFSIZ];
+	char *txt = NULL;
+	int pri = LOG_INFO;
+
+	if (level > log_level)
+		return;
+
+	switch (level) {
+	case SYSLOG_LEVEL_FATAL:
+		if (!log_on_stderr)
+			txt = "fatal";
+		pri = LOG_CRIT;
+		break;
+	case SYSLOG_LEVEL_ERROR:
+		if (!log_on_stderr)
+			txt = "error";
+		pri = LOG_ERR;
+		break;
+	case SYSLOG_LEVEL_INFO:
+		pri = LOG_INFO;
+		break;
+	case SYSLOG_LEVEL_VERBOSE:
+		pri = LOG_INFO;
+		break;
+	case SYSLOG_LEVEL_DEBUG1:
+		txt = "debug1";
+		pri = LOG_DEBUG;
+		break;
+	case SYSLOG_LEVEL_DEBUG2:
+		txt = "debug2";
+		pri = LOG_DEBUG;
+		break;
+	case SYSLOG_LEVEL_DEBUG3:
+		txt = "debug3";
+		pri = LOG_DEBUG;
+		break;
+	default:
+		txt = "internal error";
+		pri = LOG_ERR;
+		break;
+	}
+	if (txt != NULL) {
+		snprintf(fmtbuf, sizeof(fmtbuf), "%s: %s", txt, fmt);
+		vsnprintf(msgbuf, sizeof(msgbuf), fmtbuf, args);
+	} else {
+		vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
+	}
+	strnvis(fmtbuf, msgbuf, sizeof(fmtbuf),
+	    log_on_stderr ? LOG_STDERR_VIS : LOG_SYSLOG_VIS);
+	if (log_on_stderr) {
+		snprintf(msgbuf, sizeof msgbuf, "%s\r\n", fmtbuf);
+		write(STDERR_FILENO, msgbuf, strlen(msgbuf));
+	} else {
+#if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
+		openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata);
+		syslog_r(pri, &sdata, "%.500s", fmtbuf);
+		closelog_r(&sdata);
+#else
+		openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
+		syslog(pri, "%.500s", fmtbuf);
+		closelog();
+#endif
+	}
+}