1 files changed, 5 insertions, 5 deletions

diff --git a/libbb/full_write.c b/libbb/full_write.c
index a2c07fbc9..1106a53b4 100644
--- a/libbb/full_write.c
+++ b/libbb/full_write.c
@@ -28,10 +28,10 @@
  * This does multiple writes as necessary.
  * Returns the amount written, or -1 on an error.
  */
-int full_write(int fd, const char *buf, int len)
+ssize_t bb_full_write(int fd, const void *buf, size_t len)
 {
-        int cc;
-        int total;
+        ssize_t cc;
+        ssize_t total;
 
         total = 0;
 
@@ -39,10 +39,10 @@ int full_write(int fd, const char *buf, int len)
                 cc = write(fd, buf, len);
 
                 if (cc < 0)
-                        return -1;
+                        return cc;              /* write() returns -1 on failure. */
 
-                buf += cc;
                 total += cc;
+                buf = ((const char *)buf) + cc;
                 len -= cc;
         }