Update temp file handling and use a single function to do all

the heavy lifting (most of the heavy lifting stolen from glibc,
but reduced a bit).

1 files changed, 51 insertions, 0 deletions

diff --git a/libc/stdio/tmpfile.c b/libc/stdio/tmpfile.c
new file mode 100644
index 000000000..8c11d2ff7
--- /dev/null
+++ b/libc/stdio/tmpfile.c
@@ -0,0 +1,51 @@
+/* Copyright (C) 1991, 1993, 1996, 1997, 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 <stdio.h>
+#include <unistd.h>
+
+extern int __path_search (char *tmpl, size_t tmpl_len, const char *dir, const char *pfx,
+	       int try_tmpdir);
+extern int __gen_tempname (char *tmpl, int openit);
+
+/* This returns a new stream opened on a temporary file (generated
+   by tmpnam).  The file is opened with mode "w+b" (binary read/write).
+   If we couldn't generate a unique filename or the file couldn't
+   be opened, NULL is returned.  */
+FILE * tmpfile (void)
+{
+    char buf[FILENAME_MAX];
+    int fd;
+    FILE *f;
+
+    if (__path_search (buf, FILENAME_MAX, NULL, "tmpf", 0))
+	return NULL;
+    fd = __gen_tempname (buf, 1);
+    if (fd < 0)
+	return NULL;
+
+    /* Note that this relies on the Unix semantics that
+       a file is not really removed until it is closed.  */
+    (void) remove (buf);
+
+    if ((f = fdopen (fd, "w+b")) == NULL)
+	close (fd);
+
+    return f;
+}
+