Third time lucky

1 files changed, 57 insertions, 0 deletions

diff --git a/atomicio.c b/atomicio.c
new file mode 100644
index 000000000..46ffee357
--- /dev/null
+++ b/atomicio.c
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 1999 Theo de Raadt
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "includes.h"
+RCSID("$Id: atomicio.c,v 1.7 1999/12/07 06:03:33 damien Exp $");
+
+#include "xmalloc.h"
+#include "ssh.h"
+
+/*
+ * ensure all of data on socket comes through. f==read || f==write
+ */
+int
+atomicio(f, fd, s, n)
+        int (*f) ();
+        int fd;
+        void *s;
+        size_t n;
+{
+        int res, pos = 0;
+
+        while (n > pos) {
+                res = (f) (fd, s + pos, n - pos);
+                switch (res) {
+                case -1:
+                        if (errno == EINTR || errno == EAGAIN)
+                                continue;
+                case 0:
+                        return (res);
+                default:
+                        pos += res;
+                }
+        }
+        return (pos);
+}