Use return value of write function

But fd_copy is unused currently

diff --git a/src/util.c b/src/util.c
index d6547b8..0da8e97 100644 (file)
--- a/src/util.c
+++ b/src/util.c
@@ -661,7 +661,19 @@ errr fd_copy(cptr file, cptr what)
        /* Copy */
        while ((read_num = read(src_fd, buf, 1024)) > 0)
        {
        /* Copy */
        while ((read_num = read(src_fd, buf, 1024)) > 0)
        {

-               write(dst_fd, buf, read_num);
+               int write_num = 0;
+               while (write_num < read_num)
+               {
+                       int ret = write(dst_fd, buf + write_num, read_num - write_num);
+                       if (ret < 0) {
+                               /* Close files */
+                               fd_close(src_fd);
+                               fd_close(dst_fd);
+
+                               return ret;
+                       }
+                       write_num += ret;
+               }

        }
 
        /* Close files */
        }
 
        /* Close files */