X-Git-Url: http://andersk.mit.edu/gitweb/openssh.git/blobdiff_plain/59c9718951e2de053174eaa7df6ecc74642d03a4..9a6fee8b2b42608a177803d2351d3cfe732910d8:/log.c

diff --git a/log.c b/log.c
index 9df2a93f..685717ae 100644
--- a/log.c
+++ b/log.c
@@ -10,8 +10,6 @@
  * called by a name other than "ssh" or "Secure Shell".
  */
 /*
- * Shared versions of debug(), log(), etc.
- *
  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -36,21 +34,82 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: log.c,v 1.14 2001/01/18 16:20:21 markus Exp $");
+RCSID("$OpenBSD: log.c,v 1.25 2003/01/11 18:29:43 markus Exp $");
 
-#include "ssh.h"
+#include "log.h"
 #include "xmalloc.h"
 
-/* Fatal messages.  This function never returns. */
+#include <syslog.h>
 
-void
-fatal(const char *fmt,...)
+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;
+
+/* 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[] =
 {
-	va_list args;
-	va_start(args, fmt);
-	do_log(SYSLOG_LEVEL_FATAL, fmt, args);
-	va_end(args);
-	fatal_cleanup();
+	{ "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. */
@@ -59,6 +118,7 @@ void
 error(const char *fmt,...)
 {
 	va_list args;
+
 	va_start(args, fmt);
 	do_log(SYSLOG_LEVEL_ERROR, fmt, args);
 	va_end(args);
@@ -67,9 +127,10 @@ error(const char *fmt,...)
 /* Log this message (information that usually should go to the log). */
 
 void
-log(const char *fmt,...)
+logit(const char *fmt,...)
 {
 	va_list args;
+
 	va_start(args, fmt);
 	do_log(SYSLOG_LEVEL_INFO, fmt, args);
 	va_end(args);
@@ -81,6 +142,7 @@ void
 verbose(const char *fmt,...)
 {
 	va_list args;
+
 	va_start(args, fmt);
 	do_log(SYSLOG_LEVEL_VERBOSE, fmt, args);
 	va_end(args);
@@ -92,6 +154,7 @@ void
 debug(const char *fmt,...)
 {
 	va_list args;
+
 	va_start(args, fmt);
 	do_log(SYSLOG_LEVEL_DEBUG1, fmt, args);
 	va_end(args);
@@ -101,6 +164,7 @@ void
 debug2(const char *fmt,...)
 {
 	va_list args;
+
 	va_start(args, fmt);
 	do_log(SYSLOG_LEVEL_DEBUG2, fmt, args);
 	va_end(args);
@@ -110,6 +174,7 @@ void
 debug3(const char *fmt,...)
 {
 	va_list args;
+
 	va_start(args, fmt);
 	do_log(SYSLOG_LEVEL_DEBUG3, fmt, args);
 	va_end(args);
@@ -154,8 +219,21 @@ fatal_remove_cleanup(void (*proc) (void *context), void *context)
 			return;
 		}
 	}
-	fatal("fatal_remove_cleanup: no such cleanup function: 0x%lx 0x%lx\n",
-	      (u_long) proc, (u_long) context);
+	fatal("fatal_remove_cleanup: no such cleanup function: 0x%lx 0x%lx",
+	    (u_long) proc, (u_long) context);
+}
+
+/* Remove all cleanups, to be called after fork() */
+void
+fatal_remove_all_cleanups(void)
+{
+	struct fatal_cleanup *cu, *next_cu;
+
+	for (cu = fatal_cleanups; cu; cu = next_cu) {
+		next_cu = cu->next;
+		xfree(cu);
+	}
+	fatal_cleanups = NULL;
 }
 
 /* Cleanup and exit */
@@ -172,70 +250,151 @@ fatal_cleanup(void)
 	for (cu = fatal_cleanups; cu; cu = next_cu) {
 		next_cu = cu->next;
 		debug("Calling cleanup 0x%lx(0x%lx)",
-		      (u_long) cu->proc, (u_long) cu->context);
+		    (u_long) cu->proc, (u_long) cu->context);
 		(*cu->proc) (cu->context);
 	}
 	exit(255);
 }
 
-/* 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, 0 }
-};
+/*
+ * Initialize the log.
+ */
 
-static struct {
-	const char *name;
-	LogLevel val;
-} log_levels[] =
+void
+log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
 {
-	{ "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, 0 }
-};
+	argv0 = av0;
 
-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 (SyslogFacility) - 1;
+	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);
+	}
 }
 
-LogLevel
-log_level_number(char *name)
+#define MSGBUFSIZ 1024
+
+void
+do_log(LogLevel level, const char *fmt, va_list args)
 {
-	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 (LogLevel) - 1;
+	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);
+	}
+	/* Escape magic chars in output. */
+	strnvis(fmtbuf, msgbuf, sizeof(fmtbuf), VIS_OCTAL);
+	
+	if (log_on_stderr) {
+		fprintf(stderr, "%s\r\n", fmtbuf);
+	} else {
+		openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
+		syslog(pri, "%.500s", fmtbuf);
+		closelog();
+	}
 }