From 8cc4c6cb0349bcc7d17f9f5b92b27f49aa714fa8 Mon Sep 17 00:00:00 2001
From: Jonas 'Sortie' Termansen <sortie@maxsi.org>
Date: Fri, 29 Mar 2013 14:29:11 +0100
Subject: [PATCH] Add tmpfile(3).

---
 libc/Makefile        |  1 +
 libc/include/stdio.h |  2 +-
 libc/tmpfile.cpp     | 39 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 41 insertions(+), 1 deletion(-)
 create mode 100644 libc/tmpfile.cpp

diff --git a/libc/Makefile b/libc/Makefile
index 5b8e02b4..02a5b458 100644
--- a/libc/Makefile
+++ b/libc/Makefile
@@ -325,6 +325,7 @@ sys/socket/socketpair.o \
 system.o \
 tfork.o \
 time.o \
+tmpfile.o \
 truncateat.o \
 truncate.o \
 ttyname.o \
diff --git a/libc/include/stdio.h b/libc/include/stdio.h
index 871586d4..d1a4b86a 100644
--- a/libc/include/stdio.h
+++ b/libc/include/stdio.h
@@ -117,6 +117,7 @@ extern int sortix_puts(const char* str);
 extern int sprintf(char* restrict s, const char* restrict format, ...);
 extern int scanf(const char* restrict format, ...);
 extern int sscanf(const char* restrict s, const char* restrict format, ...);
+extern FILE* tmpfile(void);
 extern int ungetc(int c, FILE* stream);
 extern int vfprintf(FILE* restrict stream, const char* restrict format, __gnuc_va_list ap);
 extern int vfscanf(FILE* restrict stream, const char* restrict format, __gnuc_va_list arg);
@@ -131,7 +132,6 @@ extern int vsscanf(const char* restrict s, const char* restrict format, __gnuc_v
 extern char* ctermid(char* s);
 extern FILE *fmemopen(void* restrict buf, size_t size, const char* restrict mode);
 extern FILE* open_memstream(char** bufp, size_t* sizep);
-extern FILE* tmpfile(void);
 extern int dprintf(int fildes, const char* restrict format, ...);
 extern int fgetpos(FILE* restrict stream, fpos_t* restrict pos);
 extern int fsetpos(FILE* stream, const fpos_t* pos);
diff --git a/libc/tmpfile.cpp b/libc/tmpfile.cpp
new file mode 100644
index 00000000..749e7d49
--- /dev/null
+++ b/libc/tmpfile.cpp
@@ -0,0 +1,39 @@
+/*******************************************************************************
+
+    Copyright(C) Jonas 'Sortie' Termansen 2013.
+
+    This file is part of the Sortix C Library.
+
+    The Sortix 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 3 of the License, or (at your
+    option) any later version.
+
+    The Sortix 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 Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
+
+    tmpfile.cpp
+    Opens an unnamed temporary file.
+
+*******************************************************************************/
+
+#include <sys/types.h>
+
+#include <stdio.h>
+#include <unistd.h>
+
+extern "C" FILE* tmpfile()
+{
+	char name[5 + sizeof(pid_t) * 3];
+	snprintf(name, sizeof(name), "/tmp/%ju", (uintmax_t) getpid());
+	FILE* ret = fopen(name, "w+");
+	if ( !ret )
+		return NULL;
+	unlink(name);
+	return ret;
+}