From 28a4fe477b372b2c7d3086fc2031f87a18696166 Mon Sep 17 00:00:00 2001
From: Jonas 'Sortie' Termansen <sortie@maxsi.org>
Date: Mon, 22 Apr 2013 11:37:29 +0200
Subject: [PATCH] Add tmpnam(3).

---
 libc/Makefile        |  1 +
 libc/include/stdio.h |  7 +++++--
 libc/tmpnam.cpp      | 41 +++++++++++++++++++++++++++++++++++++++++
 3 files changed, 47 insertions(+), 2 deletions(-)
 create mode 100644 libc/tmpnam.cpp

diff --git a/libc/Makefile b/libc/Makefile
index f7fce25e..a471c455 100644
--- a/libc/Makefile
+++ b/libc/Makefile
@@ -344,6 +344,7 @@ system.o \
 tfork.o \
 time.o \
 tmpfile.o \
+tmpnam.o \
 truncateat.o \
 truncate.o \
 ttyname.o \
diff --git a/libc/include/stdio.h b/libc/include/stdio.h
index a31e6102..f3286e52 100644
--- a/libc/include/stdio.h
+++ b/libc/include/stdio.h
@@ -44,7 +44,7 @@ typedef off_t fpos_t;
 
 /* TODO: Implement L_ctermid */
 #if __POSIX_OBSOLETE <= 200801
-/* TODO: Implement L_tmpnam */
+#define L_tmpnam 128
 #endif
 
 /* The possibilities for the third argument to `setvbuf'. */
@@ -128,6 +128,10 @@ extern int vsnprintf(char* __restrict, size_t, const char* __restrict, __gnuc_va
 extern int vsprintf(char* __restrict s, const char* __restrict format, __gnuc_va_list ap);
 extern int vsscanf(const char* __restrict s, const char* __restrict format, __gnuc_va_list arg);
 
+#if __POSIX_OBSOLETE <= 200801
+extern char* tmpnam(char* s);
+#endif
+
 /* TODO: These are not implemented in sortix libc yet. */
 #if defined(__SORTIX_SHOW_UNIMPLEMENTED)
 extern char* ctermid(char* s);
@@ -144,7 +148,6 @@ extern void flockfile(FILE* file);
 extern void funlockfile(FILE* file);
 
 #if __POSIX_OBSOLETE <= 200801
-extern char* tmpnam(char* s);
 extern char* tempnam(const char* dir, const char* pfx);
 #endif
 #endif
diff --git a/libc/tmpnam.cpp b/libc/tmpnam.cpp
new file mode 100644
index 00000000..cbea7d72
--- /dev/null
+++ b/libc/tmpnam.cpp
@@ -0,0 +1,41 @@
+/*******************************************************************************
+
+    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/>.
+
+    tmpnam.cpp
+    Create path names for temporary files.
+
+*******************************************************************************/
+
+#include <stdio.h>
+#include <stdint.h>
+#include <unistd.h>
+
+// TODO: Please remove this function and P_tmpdir and L_tmpnam once they have
+//       been removed from the C, C++ and POSIX standards.
+extern "C" char* tmpnam(char* s)
+{
+	static char static_string[L_tmpnam+1];
+	if ( !s )
+		s = static_string;
+	static int current_index = 0;
+	// TODO: This isn't thread safe!
+	snprintf(s, L_tmpnam, "%s/tmpnam.pid%ju.%i", P_tmpdir, (uintmax_t) getpid(),
+	         current_index++);
+	return s;
+}