fix regression in getopt_long support for non-option arguments

[musl] / src / stdio / fwrite.c

diff --git a/src/stdio/fwrite.c b/src/stdio/fwrite.c
index 1b8641a..81ec271 100644 (file)
--- a/src/stdio/fwrite.c
+++ b/src/stdio/fwrite.c
@@ -1,6 +1,7 @@
 #include "stdio_impl.h"
+#include <string.h>
 
-size_t __fwritex(const unsigned char *s, size_t l, FILE *f)
+size_t __fwritex(const unsigned char *restrict s, size_t l, FILE *restrict f)
 {
        size_t i=0;
 
@@ -24,10 +25,9 @@ size_t __fwritex(const unsigned char *s, size_t l, FILE *f)
        return l+i;
 }
 
-size_t fwrite(const void *src, size_t size, size_t nmemb, FILE *f)
+size_t fwrite(const void *restrict src, size_t size, size_t nmemb, FILE *restrict f)
 {
        size_t k, l = size*nmemb;
-       if (!l) return l;
        FLOCK(f);
        k = __fwritex(src, l, f);
        FUNLOCK(f);