X-Git-Url: http://andersk.mit.edu/gitweb/gssapi-openssh.git/blobdiff_plain/bfe4994432b3a30a7e74fbf531d4e54ab7a3c228..86a22a0a7eda4bbef1e9d7157145cf6b7f42f1a1:/openssh/log.c

diff --git a/openssh/log.c b/openssh/log.c
index 84e4ce0..7f88674 100644
--- a/openssh/log.c
+++ b/openssh/log.c
@@ -1,3 +1,4 @@
+/* $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
@@ -34,12 +35,21 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: log.c,v 1.25 2003/01/11 18:29:43 markus Exp $");
 
-#include "log.h"
-#include "xmalloc.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;
@@ -48,6 +58,9 @@ 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 {
@@ -124,10 +137,24 @@ error(const char *fmt,...)
 	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
-log(const char *fmt,...)
+logit(const char *fmt,...)
 {
 	va_list args;
 
@@ -180,83 +207,6 @@ debug3(const char *fmt,...)
 	va_end(args);
 }
 
-/* Fatal cleanup */
-
-struct fatal_cleanup {
-	struct fatal_cleanup *next;
-	void (*proc) (void *);
-	void *context;
-};
-
-static struct fatal_cleanup *fatal_cleanups = NULL;
-
-/* Registers a cleanup function to be called by fatal() before exiting. */
-
-void
-fatal_add_cleanup(void (*proc) (void *), void *context)
-{
-	struct fatal_cleanup *cu;
-
-	cu = xmalloc(sizeof(*cu));
-	cu->proc = proc;
-	cu->context = context;
-	cu->next = fatal_cleanups;
-	fatal_cleanups = cu;
-}
-
-/* Removes a cleanup frunction to be called at fatal(). */
-
-void
-fatal_remove_cleanup(void (*proc) (void *context), void *context)
-{
-	struct fatal_cleanup **cup, *cu;
-
-	for (cup = &fatal_cleanups; *cup; cup = &cu->next) {
-		cu = *cup;
-		if (cu->proc == proc && cu->context == context) {
-			*cup = cu->next;
-			xfree(cu);
-			return;
-		}
-	}
-	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 */
-void
-fatal_cleanup(void)
-{
-	struct fatal_cleanup *cu, *next_cu;
-	static int called = 0;
-
-	if (called)
-		exit(255);
-	called = 1;
-	/* Call cleanup functions. */
-	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);
-		(*cu->proc) (cu->context);
-	}
-	exit(255);
-}
-
-
 /*
  * Initialize the log.
  */
@@ -264,6 +214,10 @@ fatal_cleanup(void)
 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) {
@@ -332,6 +286,19 @@ log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
 		    (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
@@ -339,6 +306,9 @@ log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
 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;
@@ -387,14 +357,20 @@ do_log(LogLevel level, const char *fmt, va_list args)
 	} else {
 		vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
 	}
-	/* Escape magic chars in output. */
-	strnvis(fmtbuf, msgbuf, sizeof(fmtbuf), VIS_OCTAL);
-	
+	strnvis(fmtbuf, msgbuf, sizeof(fmtbuf),
+	    log_on_stderr ? LOG_STDERR_VIS : LOG_SYSLOG_VIS);
 	if (log_on_stderr) {
-		fprintf(stderr, "%s\r\n", fmtbuf);
+		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
 	}
 }