1 files changed, 68 insertions, 0 deletions

diff --git a/coreutils/printf.c b/coreutils/printf.c
index 7763d7c46..1bcc74d3b 100644
--- a/coreutils/printf.c
+++ b/coreutils/printf.c
@@ -152,6 +152,71 @@ static double my_xstrtod(const char *arg)
         return result;
 }
 
+#if ENABLE_PLATFORM_MINGW32
+static int buflen = 0;
+static int bufmax = 0;
+static char *buffer = NULL;
+
+static void my_flush(void)
+{
+        if (buffer)
+                full_write(STDOUT_FILENO, buffer, buflen);
+        free(buffer);
+        buffer = NULL;
+        buflen = bufmax = 0;
+}
+
+static void copy_to_buffer(const char *str, int len)
+{
+        char *newbuf;
+
+        if (buflen + len >= bufmax) {
+                bufmax += 256 + len;
+                if ((newbuf = realloc(buffer, bufmax)) == NULL) {
+                        my_flush();
+                        return;
+                }
+                buffer = newbuf;
+        }
+        memcpy(buffer + buflen, str, len);
+        buflen += len;
+
+        if (buflen > 40 && buffer[buflen-1] == '\n')
+                my_flush();
+}
+
+static int my_putchar(int ch)
+{
+        char str[1] = { (char)ch };
+        copy_to_buffer(str, 1);
+        return ch;
+}
+
+static int my_printf(const char *format, ...)
+{
+        va_list list;
+        char *str;
+        int len;
+
+        va_start(list, format);
+        len = vasprintf(&str, format, list);
+        va_end(list);
+
+        if (len >= 0) {
+                copy_to_buffer(str, len);
+                free(str);
+        }
+        return len;
+}
+
+#undef bb_putchar
+#undef putchar
+#undef printf
+#define bb_putchar(c) my_putchar(c)
+#define putchar(c) my_putchar(c)
+#define printf(...) my_printf(__VA_ARGS__)
+#endif
+
 /* Handles %b; return 1 if output is to be short-circuited by \c */
 static int print_esc_string(const char *str)
 {
@@ -444,6 +509,9 @@ int printf_main(int argc UNUSED_PARAM, char **argv)
         do {
                 argv = argv2;
                 argv2 = print_formatted(format, argv, &conv_err);
+#if ENABLE_PLATFORM_MINGW32
+                my_flush();
+#endif
         } while (argv2 > argv && *argv2);
 
         /* coreutils compat (bash doesn't do this):