From 056ae6eb5e277c48141771482fd01c6d7ba2a62d Mon Sep 17 00:00:00 2001
From: Guy Harris <guy@alum.mit.edu>
Date: Fri, 1 Oct 1999 21:41:38 +0000
Subject: Uwe Girlich's patch to handle OSes (e.g., SINIX) that lack
 "strncasecmp()" or "mkstemp()"; add in source to the GNU "libc" versions, and
 have the "configure" script check for the routines in question and set up the
 Makefile to build from our versions if they're missing.

svn path=/trunk/; revision=745
---
 mkstemp.c | 69 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 mkstemp.c

(limited to 'mkstemp.c')

diff --git a/mkstemp.c b/mkstemp.c
new file mode 100644
index 0000000000..7bb4ea32b7
--- /dev/null
+++ b/mkstemp.c
@@ -0,0 +1,69 @@
+/* Copyright (C) 1991, 1992, 1996, 1998 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#ifndef __set_errno
+#define __set_errno(x) errno=(x) 
+#endif
+
+/* Generate a unique temporary file name from TEMPLATE.
+   The last six characters of TEMPLATE must be "XXXXXX";
+   they are replaced with a string that makes the filename unique.
+   Returns a file descriptor open on the file for reading and writing.  */
+int
+mkstemp (template)
+     char *template;
+{
+  static const char letters[]
+    = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
+  size_t len;
+  size_t i;
+
+  len = strlen (template);
+  if (len < 6 || strcmp (&template[len - 6], "XXXXXX"))
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  if (sprintf (&template[len - 5], "%.5u",
+	       (unsigned int) getpid () % 100000) != 5)
+    /* Inconceivable lossage.  */
+    return -1;
+
+  for (i = 0; i < sizeof (letters); ++i)
+    {
+      int fd;
+
+      template[len - 6] = letters[i];
+
+      fd = open (template, O_RDWR|O_CREAT|O_EXCL, 0600);
+      if (fd >= 0)
+	return fd;
+    }
+
+  /* We return the null string if we can't find a unique file name.  */
+  template[0] = '\0';
+  return -1;
+}
-- 
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