1 files changed, 14 insertions, 5 deletions

diff --git a/xmalloc.c b/xmalloc.c
index 1a471889a..8a23b8b70 100644
--- a/xmalloc.c
+++ b/xmalloc.c
@@ -13,7 +13,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: xmalloc.c,v 1.11 2001/02/04 15:32:27 stevesk Exp $");
+RCSID("$OpenBSD: xmalloc.c,v 1.14 2001/02/07 18:04:50 itojun Exp $");
 
 #include "xmalloc.h"
 #include "log.h"
@@ -21,9 +21,13 @@ RCSID("$OpenBSD: xmalloc.c,v 1.11 2001/02/04 15:32:27 stevesk Exp $");
 void *
 xmalloc(size_t size)
 {
-        void *ptr = malloc(size);
+        void *ptr;
+
+        if (size == 0)
+                fatal("xmalloc: zero size");
+        ptr = malloc(size);
         if (ptr == NULL)
-                fatal("xmalloc: out of memory (allocating %d bytes)", (int) size);
+                fatal("xmalloc: out of memory (allocating %lu bytes)", (u_long) size);
         return ptr;
 }
 
@@ -32,11 +36,13 @@ xrealloc(void *ptr, size_t new_size)
 {
         void *new_ptr;
 
+        if (new_size == 0)
+                fatal("xrealloc: zero size");
         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);
+                fatal("xrealloc: out of memory (new_size %lu bytes)", (u_long) new_size);
         return new_ptr;
 }
 
@@ -52,8 +58,11 @@ char *
 xstrdup(const char *str)
 {
         size_t len = strlen(str) + 1;
+        char *cp;
 
-        char *cp = xmalloc(len);
+        if (len == 0)
+                fatal("xstrdup: zero size");
+        cp = xmalloc(len);
         strlcpy(cp, str, len);
         return cp;
 }