1 files changed, 252 insertions, 0 deletions
diff --git a/lib/util/debug.c b/lib/util/debug.c
new file mode 100644
index 0000000000..98aabc554b
--- /dev/null
+++ b/lib/util/debug.c
@@ -0,0 +1,252 @@
+/*
+   Unix SMB/CIFS implementation.
+   Samba debug functions
+   Copyright (C) Andrew Tridgell 2003
+   Copyright (C) James J Myers	 2003
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "system/filesys.h"
+#include "system/time.h"
+#include "dynconfig/dynconfig.h"
+
+/**
+ * @file
+ * @brief Debug logging
+ **/
+
+/** 
+ * this global variable determines what messages are printed 
+ */
+int _debug_level = 0;
+_PUBLIC_ int *debug_level = &_debug_level;
+static int debug_all_class_hack = 1;
+int *DEBUGLEVEL_CLASS = &debug_all_class_hack; /* For samba 3 */
+static bool debug_all_class_isset_hack = true;
+bool    *DEBUGLEVEL_CLASS_ISSET = &debug_all_class_isset_hack; /* For samba 3 */
+XFILE *dbf = NULL; /* For Samba 3*/
+
+/* the registered mutex handlers */
+static struct {
+	const char *name;
+	struct debug_ops ops;
+} debug_handlers;
+
+/* state variables for the debug system */
+static struct {
+	int fd;
+	enum debug_logtype logtype;
+	const char *prog_name;
+} state;
+
+static bool reopen_logs_scheduled;
+static bool check_reopen_logs(void)
+{
+	if (state.fd == 0 || reopen_logs_scheduled) {
+		reopen_logs_scheduled = false;
+		reopen_logs();
+	}
+
+	if (state.fd <= 0) 
+		return false;
+
+	return true;
+}
+
+_PUBLIC_ void debug_schedule_reopen_logs(void)
+{
+	reopen_logs_scheduled = true;
+}
+
+static void log_timestring(int level, const char *location, const char *func)
+{
+	char *t = NULL;
+	char *s = NULL;
+
+	if (!check_reopen_logs()) return;
+
+	if (state.logtype != DEBUG_FILE) return;
+
+	t = timestring(NULL, time(NULL));
+	if (!t) return;
+
+	asprintf(&s, "[%s, %d %s:%s()]\n", t, level, location, func);
+	talloc_free(t);
+	if (!s) return;
+
+	write(state.fd, s, strlen(s));
+	free(s);
+}
+
+/**
+  the backend for debug messages. Note that the DEBUG() macro has already
+  ensured that the log level has been met before this is called
+*/
+_PUBLIC_ void dbghdr(int level, const char *location, const char *func)
+{
+	log_timestring(level, location, func);
+	log_task_id();
+}
+
+
+_PUBLIC_ void dbghdrclass(int level, int class, const char *location, const char *func)
+{
+	/* Simple wrapper, Samba 4 doesn't do debug classes */
+	dbghdr(level, location, func);
+}
+
+/**
+  the backend for debug messages. Note that the DEBUG() macro has already
+  ensured that the log level has been met before this is called
+
+  @note You should never have to call this function directly. Call the DEBUG()
+  macro instead.
+*/
+_PUBLIC_ void dbgtext(const char *format, ...)
+{
+	va_list ap;
+	char *s = NULL;
+
+	if (!check_reopen_logs()) return;
+
+	va_start(ap, format);
+	vasprintf(&s, format, ap);
+	va_end(ap);
+
+	write(state.fd, s, strlen(s));
+	free(s);
+}
+
+_PUBLIC_ const char *logfile = NULL;
+
+/**
+  reopen the log file (usually called because the log file name might have changed)
+*/
+_PUBLIC_ void reopen_logs(void)
+{
+	char *fname = NULL;
+	int old_fd = state.fd;
+
+	switch (state.logtype) {
+	case DEBUG_STDOUT:
+		state.fd = 1;
+		break;
+
+	case DEBUG_STDERR:
+		state.fd = 2;
+		break;
+
+	case DEBUG_FILE:
+		if (logfile && (*logfile) == '/') {
+			fname = strdup(logfile);
+		} else {
+			asprintf(&fname, "%s/%s.log", dyn_LOGFILEBASE, state.prog_name);
+		}
+		if (fname) {
+			int newfd = open(fname, O_CREAT|O_APPEND|O_WRONLY, 0600);
+			if (newfd == -1) {
+				DEBUG(1, ("Failed to open new logfile: %s\n", fname));
+				old_fd = -1;
+			} else {
+				state.fd = newfd;
+			}
+			free(fname);
+		} else {
+			DEBUG(1, ("Failed to find name for file-based logfile!\n"));
+		}
+
+		break;
+	}
+
+	if (old_fd > 2) {
+		close(old_fd);
+	}
+}
+
+/**
+  control the name of the logfile and whether logging will be to stdout, stderr
+  or a file
+*/
+_PUBLIC_ void setup_logging(const char *prog_name, enum debug_logtype new_logtype)
+{
+	if (state.logtype < new_logtype) {
+		state.logtype = new_logtype;
+	}
+	if (prog_name) {
+		state.prog_name = prog_name;
+	}
+	reopen_logs();
+}
+
+/**
+  return a string constant containing n tabs
+  no more than 10 tabs are returned
+*/
+_PUBLIC_ const char *do_debug_tab(int n)
+{
+	const char *tabs[] = {"", "\t", "\t\t", "\t\t\t", "\t\t\t\t", "\t\t\t\t\t", 
+			      "\t\t\t\t\t\t", "\t\t\t\t\t\t\t", "\t\t\t\t\t\t\t\t", 
+			      "\t\t\t\t\t\t\t\t\t", "\t\t\t\t\t\t\t\t\t\t"};
+	return tabs[MIN(n, 10)];
+}
+
+
+/**
+  log suspicious usage - print comments and backtrace
+*/	
+_PUBLIC_ void log_suspicious_usage(const char *from, const char *info)
+{
+	if (!debug_handlers.ops.log_suspicious_usage) return;
+
+	debug_handlers.ops.log_suspicious_usage(from, info);
+}
+
+
+/**
+  print suspicious usage - print comments and backtrace
+*/	
+_PUBLIC_ void print_suspicious_usage(const char* from, const char* info)
+{
+	if (!debug_handlers.ops.print_suspicious_usage) return;
+
+	debug_handlers.ops.print_suspicious_usage(from, info);
+}
+
+_PUBLIC_ uint32_t get_task_id(void)
+{
+	if (debug_handlers.ops.get_task_id) {
+		return debug_handlers.ops.get_task_id();
+	}
+	return getpid();
+}
+
+_PUBLIC_ void log_task_id(void)
+{
+	if (!debug_handlers.ops.log_task_id) return;
+
+	if (!check_reopen_logs()) return;
+
+	debug_handlers.ops.log_task_id(state.fd);
+}
+
+/**
+  register a set of debug handlers. 
+*/
+_PUBLIC_ void register_debug_handlers(const char *name, struct debug_ops *ops)
+{
+	debug_handlers.name = name;
+	debug_handlers.ops = *ops;
+}