Patch from Matt Kraai to fix debian bug #227081

cp does not truncate existing destinations.  That is, after
running

 echo foo > foo
 echo fubar > fubar
 cp foo fubar

the contents of fubar are

 foo
 r

instead of

 foo

diff --git a/libbb/copy_file.c b/libbb/copy_file.c
index ffdb824..7ddb9a2 100644 (file)
--- a/libbb/copy_file.c
+++ b/libbb/copy_file.c
@@ -153,7 +153,7 @@ int copy_file(const char *source, const char *dest, int flags)
                                }
                        }
 
-                       dst_fd = open(dest, O_WRONLY);
+                       dst_fd = open(dest, O_WRONLY|O_TRUNC);
                        if (dst_fd == -1) {
                                if (!(flags & FILEUTILS_FORCE)) {
                                        bb_perror_msg("unable to open `%s'", dest);