X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Fhelper%2Flog.c;h=3067ecc56180fadcdbbc797c784cdecb0147eceb;hp=caaed42322d2f75733f70823a9f0778659e7d20e;hb=a3d81eed4d2aac51056f36d7c00ee639bb39c552;hpb=2861877b32a7a2f4022a1c3d9b66c9b4879878ac

diff --git a/src/helper/log.c b/src/helper/log.c
index caaed42322..3067ecc561 100644
--- a/src/helper/log.c
+++ b/src/helper/log.c
@@ -316,31 +316,53 @@ COMMAND_HANDLER(handle_log_output_command)
 	return ERROR_OK;
 }
 
+static struct command_registration log_command_handlers[] = {
+	{
+		.name = "log_output",
+		.handler = &handle_log_output_command,
+		.mode = COMMAND_ANY,
+		.help = "redirect logging to a file (default: stderr)",
+		.usage = "<file_name>",
+	},
+	{
+		.name = "debug_level",
+		.handler = &handle_debug_level_command,
+		.mode = COMMAND_ANY,
+		.help = "sets the verbosity level of debugging output",
+		.usage = "<level:0-3>",
+	},
+	COMMAND_REGISTRATION_DONE
+};
+
 int log_register_commands(struct command_context *cmd_ctx)
 {
-	start = timeval_ms();
-	register_command(cmd_ctx, NULL, "log_output", handle_log_output_command,
-		COMMAND_ANY, "redirect logging to <file> (default: stderr)");
-	register_command(cmd_ctx, NULL, "debug_level", handle_debug_level_command,
-		COMMAND_ANY, "adjust debug level <0-3>");
-
-	return ERROR_OK;
+	return register_commands(cmd_ctx, NULL, log_command_handlers);
 }
 
-int log_init(struct command_context *cmd_ctx)
+void log_init(void)
 {
-	/* set defaults for daemon configuration, if not set by cmdline or cfgfile */
+	/* set defaults for daemon configuration,
+	 * if not set by cmdline or cfgfile */
 	if (debug_level == -1)
 		debug_level = LOG_LVL_INFO;
 
-	if (log_output == NULL)
+	char *debug_env = getenv("OPENOCD_DEBUG_LEVEL");
+	if (NULL != debug_env)
 	{
-		log_output = stderr;
+		int value;
+		int retval = parse_int(debug_env, &value);
+		if (ERROR_OK == retval &&
+				debug_level >= LOG_LVL_SILENT &&
+				debug_level <= LOG_LVL_DEBUG)
+		{
+			debug_level = value;
+		}
 	}
 
-	start = last_time = timeval_ms();
+	if (log_output == NULL)
+		log_output = stderr;
 
-	return ERROR_OK;
+	start = last_time = timeval_ms();
 }
 
 int set_log_output(struct command_context *cmd_ctx, FILE *output)
@@ -395,37 +417,26 @@ int log_remove_callback(log_callback_fn fn, void *priv)
 /* return allocated string w/printf() result */
 char *alloc_vprintf(const char *fmt, va_list ap)
 {
-	/* no buffer at the beginning, force realloc to do the job */
-	char *string = NULL;
-
-	/* start with buffer size suitable for typical messages */
-	int size = 128;
-
-	for (;;)
-	{
-		char *t = string;
-		va_list ap_copy;
-		int ret;
-		string = realloc(string, size);
-		if (string == NULL)
-		{
-			if (t != NULL)
-				free(t);
-			return NULL;
-		}
+	va_list ap_copy;
+	int len;
+	char *string;
 
-		va_copy(ap_copy, ap);
+	/* determine the length of the buffer needed */
+	va_copy(ap_copy, ap);
+	len = vsnprintf(NULL, 0, fmt, ap_copy);
+	va_end(ap_copy);
 
-		ret = vsnprintf(string, size, fmt, ap_copy);
-		/* NB! The result of the vsnprintf() might be an *EMPTY* string! */
-		if ((ret >= 0) && ((ret + 1) < size))
-			break;
+	/* allocate and make room for terminating zero. */
+	/* FIXME: The old version always allocated at least one byte extra and
+	 * other code depend on that. They should be probably be fixed, but for
+	 * now reserve the extra byte. */
+	string = malloc(len + 2);
+	if (string == NULL)
+		return NULL;
 
-		/* there was just enough or not enough space, allocate more in the next round */
-		size *= 2; /* double the buffer size */
-	}
+	/* do the real work */
+	vsnprintf(string, len + 1, fmt, ap);
 
-	/* the returned buffer is by principle guaranteed to be at least one character longer */
 	return string;
 }