readlink: uClibc supports automatic allocation too now

[oweals/busybox.git] / libbb / full_write.c

diff --git a/libbb/full_write.c b/libbb/full_write.c
index 7bbacb8acc14aa7bf8303e21ea13f10b756d5a1d..777fbd9101454ab9d5700446ec5c7fac3f59bbd5 100644 (file)
--- a/libbb/full_write.c
+++ b/libbb/full_write.c
@@ -4,7 +4,7 @@
  *
  * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
  *
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
 
 #include "libbb.h"
@@ -14,7 +14,7 @@
  * This does multiple writes as necessary.
  * Returns the amount written, or -1 on an error.
  */
-ssize_t full_write(int fd, const void *buf, size_t len)
+ssize_t FAST_FUNC full_write(int fd, const void *buf, size_t len)
 {
        ssize_t cc;
        ssize_t total;
@@ -24,8 +24,14 @@ ssize_t full_write(int fd, const void *buf, size_t len)
        while (len) {
                cc = safe_write(fd, buf, len);
 
-               if (cc < 0)
-                       return cc;      /* write() returns -1 on failure. */
+               if (cc < 0) {
+                       if (total) {
+                               /* we already wrote some! */
+                               /* user can do another write to know the error code */
+                               return total;
+                       }
+                       return cc;  /* write() returns -1 on failure. */
+               }
 
                total += cc;
                buf = ((const char *)buf) + cc;