console: Support a format string for stderr output

Add a console_printf_select_stderr() function so that it is not
necessary for the caller to process the format string.

Signed-off-by: Simon Glass <[email protected]>
Reviewed-by: Alexander Sverdlin <[email protected]>

1 files changed, 18 insertions, 0 deletions

diff --git a/common/console.c b/common/console.c
index 275da2f264d..48586fd2166 100644
--- a/common/console.c
+++ b/common/console.c
@@ -359,6 +359,24 @@ void console_puts_select_stderr(bool serial_only, const char *s)
 		console_puts_select(stderr, serial_only, s);
 }
 
+int console_printf_select_stderr(bool serial_only, const char *fmt, ...)
+{
+	char buf[CONFIG_SYS_PBSIZE];
+	va_list args;
+	int ret;
+
+	va_start(args, fmt);
+
+	/* For this to work, buf must be larger than anything we ever want to
+	 * print.
+	 */
+	ret = vscnprintf(buf, sizeof(buf), fmt, args);
+	va_end(args);
+	console_puts_select_stderr(serial_only, buf);
+
+	return ret;
+}
+
 static void console_puts(int file, const char *s)
 {
 	int i;