1 files changed, 51 insertions, 1 deletions
diff --git a/mbbsd/kaede.c b/mbbsd/kaede.c
index eef5bb03..150d13f3 100644
--- a/mbbsd/kaede.c
+++ b/mbbsd/kaede.c
@@ -104,12 +104,62 @@ Copy(const char *src, const char *dst)
     if(fi<0) return -1;
     fo=open(dst, O_WRONLY | O_TRUNC | O_CREAT, 0600);
     if(fo<0) {close(fi); return -1;}
-    while((bytes=read(fi, buf, 8192))>0)
+    while((bytes=read(fi, buf, sizeof(buf)))>0)
          write(fo, buf, bytes);
     close(fo);
     close(fi);
     return 0;  
 }
+
+int
+CopyN(const char *src, const char *dst, int n)
+{
+    int fi, fo, bytes;
+    char buf[8192];
+
+    fi=open(src, O_RDONLY);
+    if(fi<0) return -1;
+
+    fo=open(dst, O_WRONLY | O_TRUNC | O_CREAT, 0600);
+    if(fo<0) {close(fi); return -1;}
+
+    while(n > 0 && (bytes=read(fi, buf, sizeof(buf)))>0)
+    {
+	 n -= bytes;
+	 if (n < 0)
+	     bytes += n;
+         write(fo, buf, bytes);
+    }
+    close(fo);
+    close(fi);
+    return 0;  
+}
+
+/* append data from tail of src (starting point=off) to dst */
+int
+AppendTail(const char *src, const char *dst, int off)
+{
+    int fi, fo, bytes;
+    char buf[8192];
+
+    fi=open(src, O_RDONLY);
+    if(fi<0) return -1;
+
+    fo=open(dst, O_WRONLY | O_APPEND | O_CREAT, 0600);
+    if(fo<0) {close(fi); return -1;}
+    
+    if(off > 0)
+	lseek(fi, (off_t)off, SEEK_SET);
+
+    while((bytes=read(fi, buf, sizeof(buf)))>0)
+    {
+         write(fo, buf, bytes);
+    }
+    close(fo);
+    close(fi);
+    return 0;  
+}
+
 int
 Link(const char *src, const char *dst)
 {