PSARC 2006/162 Extended FILE space for 32-bit Solaris processes

1085341 32-bit stdio routines should support file descriptors >255
6369408 fflush(NULL); will corrupt data written on files in multithreaded apps

1 files changed, 90 insertions, 0 deletions

diff --git a/usr/src/lib/extendedFILE/common/extendedFILE.c b/usr/src/lib/extendedFILE/common/extendedFILE.c
new file mode 100644
index 0000000000..b3f4fc6721
--- /dev/null
+++ b/usr/src/lib/extendedFILE/common/extendedFILE.c
@@ -0,0 +1,90 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (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 2006 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include "c_synonyms.h"
+#include <sys/types.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdio_ext.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define	_FILE_FD_MAX 255
+
+/*
+ * This 32-bit only preloadable library enables extended fd FILE's.
+ */
+
+#pragma	init(init_STDIO_bad_fd)
+
+void
+init_STDIO_bad_fd(void)
+{
+	int action = -1;	/* default signal */
+	int closed_fd = -1;	/* default fd */
+	char *ptr;
+	int signal;
+	int retval;
+
+	/*
+	 * user specified badfd
+	 */
+	if ((ptr = getenv("_STDIO_BADFD")) != NULL) {
+		closed_fd = atoi(ptr);
+		if (closed_fd < 3 || closed_fd > _FILE_FD_MAX) {
+			(void) fprintf(stderr, "File descriptor must be"
+			    " in the range 3-%d inclusive.\n", _FILE_FD_MAX);
+			exit(1);
+		}
+	}
+
+	/*
+	 * user specified action
+	 */
+	if ((ptr = getenv("_STDIO_BADFD_SIGNAL")) != NULL) {
+		/* accept numbers or symbolic names */
+		if (strncmp(ptr, "SIG", 3) == 0)	/* begins with "SIG"? */
+			ptr = ptr + 3;
+		retval = str2sig(ptr, &signal);
+		if (retval == -1) {
+			(void) fprintf(stderr,
+			    "Invalid signal name or number.\n");
+			exit(1);
+		}
+		action = signal;
+	}
+
+	if ((closed_fd = enable_extended_FILE_stdio(closed_fd, action)) == -1) {
+		perror("enable_extended_FILE_stdio(3C)");
+		exit(1);
+	}
+}