1 files changed, 29 insertions, 0 deletions
diff --git a/ghc/lib/std/cbits/writeFile.lc b/ghc/lib/std/cbits/writeFile.lc
index 71c7b0df17..80b946f117 100644
--- a/ghc/lib/std/cbits/writeFile.lc
+++ b/ghc/lib/std/cbits/writeFile.lc
@@ -35,4 +35,33 @@ StgInt bytes;
     return 0;
 }
 
+
+StgInt
+writeBuf(fp, elt_sz, len, buf)
+StgForeignObj fp;
+StgWord elt_sz;
+StgInt  len;
+StgAddr buf;
+{
+    int count;
+    char *p = (char *) buf;
+
+    if (len == 0 || elt_sz == 0)
+	return 0;
+
+    /* Disallow short writes */
+    while ((count = fwrite((char *)buf, (unsigned)elt_sz, (int)len, (FILE *) fp)) < len) {
+	if (errno != EINTR) {
+	    cvtErrno();
+	    stdErrno();
+	    return -1;
+	}
+	len -= count;
+	p += count;
+	clearerr((FILE *) fp);
+    }
+
+    return 0;
+}
+
 \end{code}