commit 4ad2a8f99042e2c06a36baf3ee4e209e5749b558
author Nicolas Pitre <npitre@baylibre.com> Wed Jun 19 22:38:21 2019 -0400
committer Anas Nashif <anas.nashif@intel.com> Sun Jul 14 23:07:44 2019 -0400
tree 9e730d48492d1552296c7c9bf8944cf6a2b25b95
parent ab59209ea6d249a8b3179639b4351c90bd5655f2

prf.c: don't be silent with unknown conversion specifiers

Mimic the glibc behavior when encountering an unknown conversion
specifier rather than silently skipping it.

Signed-off-by: Nicolas Pitre <npitre@baylibre.com>

lib/libc/minimal/source/stdout/prf.c

diff --git a/lib/libc/minimal/source/stdout/prf.c b/lib/libc/minimal/source/stdout/prf.c
index 1ce88f0..083d959 100644
--- a/lib/libc/minimal/source/stdout/prf.c
+++ b/lib/libc/minimal/source/stdout/prf.c
@@ -737,6 +737,12 @@
 				count++;
 				break;
 
+			default:
+				PUTC('%');
+				PUTC(c);
+				count += 2;
+				break;
+
 			case 0:
 				return count;
 			}