OpenSolaris Launch

1 files changed, 119 insertions, 0 deletions

diff --git a/usr/src/lib/libc/port/stdio/tmpfile.c b/usr/src/lib/libc/port/stdio/tmpfile.c
new file mode 100644
index 0000000000..723b15011c
--- /dev/null
+++ b/usr/src/lib/libc/port/stdio/tmpfile.c
@@ -0,0 +1,119 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+/*	Copyright (c) 1988 AT&T	*/
+/*	  All Rights Reserved  	*/
+
+
+/*
+ *	tmpfile - return a pointer to an update file that can be
+ *		used for scratch. The file will automatically
+ *		go away if the program using it terminates.
+ */
+
+#include "synonyms.h"
+#include "mtlib.h"
+#include <sys/types.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <thread.h>
+#include <synch.h>
+#include <sys/stat.h>
+
+static char seed[] = { 'a', 'a', 'a', '\0' };
+static mutex_t seed_lk = DEFAULTMUTEX;
+
+#define	XS "\bXXXXXX"		/* a '\b' character is prepended to this */
+				/* string to avoid conflicts with names */
+				/* generated by tmpnam() */
+/*ARGSUSED*/
+static FILE *
+_common(boolean_t large_file)
+{
+	char	tfname[L_tmpnam];
+	FILE	*p;
+	char	*q;
+	int	mkret;
+	mode_t	current_umask;
+
+	(void) strcpy(tfname, P_tmpdir);
+	lmutex_lock(&seed_lk);
+	(void) strcat(tfname, seed);
+	(void) strcat(tfname, XS);
+
+	q = seed;
+	while (*q == 'z')
+		*q++ = 'a';
+	if (*q != '\0')
+		++*q;
+	lmutex_unlock(&seed_lk);
+
+#if !defined(_LP64)
+	if (large_file == B_TRUE) {
+		if ((mkret = mkstemp64(tfname)) == -1)
+			return (NULL);
+	} else
+#endif
+		if ((mkret = mkstemp(tfname)) == -1)
+			return (NULL);
+
+	(void) unlink(tfname);
+	current_umask = umask(0777);
+	(void) umask(current_umask);
+	(void) fchmod(mkret, 0666 & ~current_umask);
+	if ((p = fdopen(mkret, "w+")) == NULL) {
+		(void) close(mkret);
+		return (NULL);
+	}
+
+	return (p);
+}
+
+#if !defined(_LP64)
+FILE *
+tmpfile64(void)
+{
+	return (_common(B_TRUE));
+}
+#endif	/* _LP64 */
+
+/*
+ * This is a bit confusing -- some explanation is in order.
+ *
+ * When we're compiled 64-bit, there's no point in distinguishing
+ * a "large" file from a "small" file -- they're all "large".
+ * The argument we pass to '_common' is ignored -- we always call
+ * mkstemp which will just do the right thing for us.
+ */
+FILE *
+tmpfile(void)
+{
+	return (_common(B_FALSE));
+}