Initial revision
diff --git a/xmalloc.c b/xmalloc.c
new file mode 100644
index 0000000..b536f9d
--- /dev/null
+++ b/xmalloc.c
@@ -0,0 +1,56 @@
+/*
+
+xmalloc.c
+
+Author: Tatu Ylonen <ylo@cs.hut.fi>
+
+Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
+ All rights reserved
+
+Created: Mon Mar 20 21:23:10 1995 ylo
+
+Versions of malloc and friends that check their results, and never return
+failure (they call fatal if they encounter an error).
+
+*/
+
+#include "includes.h"
+RCSID("$Id: xmalloc.c,v 1.1 1999/10/27 03:42:46 damien Exp $");
+
+#include "ssh.h"
+
+void *xmalloc(size_t size)
+{
+ void *ptr = malloc(size);
+ if (ptr == NULL)
+ fatal("xmalloc: out of memory (allocating %d bytes)", (int)size);
+ return ptr;
+}
+
+void *xrealloc(void *ptr, size_t new_size)
+{
+ void *new_ptr;
+
+ if (ptr == NULL)
+ fatal("xrealloc: NULL pointer given as argument");
+ new_ptr = realloc(ptr, new_size);
+ if (new_ptr == NULL)
+ fatal("xrealloc: out of memory (new_size %d bytes)", (int)new_size);
+ return new_ptr;
+}
+
+void xfree(void *ptr)
+{
+ if (ptr == NULL)
+ fatal("xfree: NULL pointer given as argument");
+ free(ptr);
+}
+
+char *xstrdup(const char *str)
+{
+ int len = strlen(str) + 1;
+
+ char *cp = xmalloc(len);
+ strlcpy(cp, str, len);
+ return cp;
+}