--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libiberty/tmpnam.c	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,52 @@
+/*
+
+@deftypefn Supplemental char* tmpnam (char *@var{s})
+
+This function attempts to create a name for a temporary file, which
+will be a valid file name yet not exist when @code{tmpnam} checks for
+it.  @var{s} must point to a buffer of at least @code{L_tmpnam} bytes,
+or be @code{NULL}.  Use of this function creates a security risk, and it must
+not be used in new projects.  Use @code{mkstemp} instead.
+
+@end deftypefn
+
+*/
+
+#include <stdio.h>
+
+#ifndef L_tmpnam
+#define L_tmpnam 100
+#endif
+#ifndef P_tmpdir
+#define P_tmpdir "/usr/tmp"
+#endif
+
+static char tmpnam_buffer[L_tmpnam];
+static int tmpnam_counter;
+
+extern int getpid (void);
+
+char *
+tmpnam (char *s)
+{
+  int pid = getpid ();
+
+  if (s == NULL)
+    s = tmpnam_buffer;
+
+  /*  Generate the filename and make sure that there isn't one called
+      it already.  */
+
+  while (1)
+    {
+      FILE *f;
+      sprintf (s, "%s/%s%x.%x", P_tmpdir, "t", pid, tmpnam_counter);
+      f = fopen (s, "r");
+      if (f == NULL)
+	break;
+      tmpnam_counter++;
+      fclose (f);
+    }
+
+  return s;
+}