libc/stdlib: add mkostemp helpers

Some projects (like udev) are starting to use this.

Imported from glibc.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

include/stdlib.h

@@ -652,6 +652,29 @@ extern int mkstemp64 (char *__template) __nonnull ((1)) __wur;
 extern char *mkdtemp (char *__template) __THROW __nonnull ((1)) __wur;
 #endif
 
+#ifdef __USE_GNU
+/* Generate a unique temporary file name from TEMPLATE similar to
+   mkstemp.  But allow the caller to pass additional flags which are
+   used in the open call to create the file..
+
+   This function is a possible cancellation point and therefore not
+   marked with __THROW.  */
+# ifndef __USE_FILE_OFFSET64
+extern int mkostemp (char *__template, int __flags) __nonnull ((1)) __wur;
+# else
+#  ifdef __REDIRECT
+extern int __REDIRECT (mkostemp, (char *__template, int __flags), mkostemp64)
+     __nonnull ((1)) __wur;
+#  else
+#   define mkostemp mkostemp64
+#  endif
+# endif
+# ifdef __USE_LARGEFILE64
+extern int mkostemp64 (char *__template, int __flags) __nonnull ((1)) __wur;
+# endif
+
+#endif
+
 
 __BEGIN_NAMESPACE_STD
 /* Execute the given line as a shell command.

libc/stdlib/Makefile.in

@@ -12,7 +12,7 @@ include $(top_srcdir)libc/stdlib/malloc-simple/Makefile.in
 include $(top_srcdir)libc/stdlib/malloc-standard/Makefile.in
 
 CSRC-y := \
-	abort.c getenv.c mkdtemp.c realpath.c canonicalize.c mkstemp.c \
+	abort.c getenv.c mkdtemp.c realpath.c canonicalize.c mkstemp.c mkostemp.c \
 	rand.c random.c random_r.c setenv.c div.c ldiv.c lldiv.c \
 	getpt.c drand48-iter.c jrand48.c \
 	jrand48_r.c lcong48.c lrand48.c lrand48_r.c mrand48.c mrand48_r.c nrand48.c \
@@ -21,7 +21,7 @@ CSRC-y := \
 CSRC-$(UCLIBC_HAS_ADVANCED_REALTIME) += posix_memalign.c
 CSRC-$(UCLIBC_HAS_PTY) += grantpt.c unlockpt.c ptsname.c
 CSRC-$(UCLIBC_HAS_ARC4RANDOM) += arc4random.c
-CSRC-$(UCLIBC_HAS_LFS) += mkstemp64.c
+CSRC-$(UCLIBC_HAS_LFS) += mkstemp64.c mkostemp64.c
 CSRC-$(UCLIBC_HAS_FLOATS) += drand48.c drand48_r.c erand48.c erand48_r.c
 CSRC-$(if $(findstring yy,$(UCLIBC_HAS_FLOATS)$(UCLIBC_SUSV3_LEGACY)),y) += \
 	gcvt.c

libc/stdlib/mkostemp.c

@@ -0,0 +1,32 @@
+/* Copyright (C) 1998-2012 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "../misc/internals/tempname.h"
+
+/* 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.
+   Then open the file and return a fd. */
+int
+mkostemp (template, flags)
+     char *template;
+     int flags;
+{
+  return __gen_tempname (template, __GT_FILE, flags);
+}

libc/stdlib/mkostemp64.c

@@ -0,0 +1,33 @@
+/* Copyright (C) 2000-2012 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "../misc/internals/tempname.h"
+
+/* 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.
+   Then open the file and return a fd. */
+int
+mkostemp64 (template, flags)
+     char *template;
+     int flags;
+{
+  return __gen_tempname (template, __GT_BIGFILE, flags | O_LARGEFILE);
+}