fix strftime %y for negative tm_year

diff --git a/src/time/strftime.c b/src/time/strftime.c
index f1ccc4dd5e848c734767f34f206daf9b173675df..e103e02b72044054f13bcbae7a16e5cb5e2781b1 100644 (file)
--- a/src/time/strftime.c
+++ b/src/time/strftime.c
@@ -167,6 +167,7 @@ const char *__strftime_fmt_1(char (*s)[100], size_t *l, int f, const struct tm *
                goto nl_strftime;
        case 'y':
                val = tm->tm_year % 100;
+               if (val<0) val += 100;
                goto number;
        case 'Y':
                val = tm->tm_year + 1900LL;