OpenSolaris Launch

1 files changed, 149 insertions, 0 deletions

diff --git a/usr/src/lib/libc/port/stdio/vscanf.c b/usr/src/lib/libc/port/stdio/vscanf.c
new file mode 100644
index 0000000000..986feae37a
--- /dev/null
+++ b/usr/src/lib/libc/port/stdio/vscanf.c
@@ -0,0 +1,149 @@
+/*
+ * 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  	*/
+
+
+#ifndef _C89_INTMAX32
+#pragma weak vscanf = _vscanf
+#pragma weak vfscanf = _vfscanf
+#pragma weak vsscanf = _vsscanf
+#endif
+
+#include "synonyms.h"
+#include "file64.h"
+#include "mtlib.h"
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include <thread.h>
+#include <synch.h>
+#include "libc.h"
+#include "stdiom.h"
+#include "mse.h"
+#include <stdio_ext.h>
+
+
+/*
+ * 32-bit shadow functions _vscanf_c89(), _vfscanf_c89(), _vsscanf_c89()
+ * are included here.
+ * When using the c89 compiler to build 32-bit applications, the size
+ * of intmax_t is 32-bits, otherwise the size of intmax_t is 64-bits.
+ * The shadow function uses 32-bit size of intmax_t for %j conversion.
+ * The #pragma redefine_extname in <stdio.h> selects the proper routine
+ * at compile time for the user application.
+ * NOTE: the shadow function only exists in the 32-bit library.
+ */
+
+int
+#ifdef _C89_INTMAX32	/* _C89_INTMAX32 version in 32-bit libc only */
+_vscanf_c89(const char *fmt, va_list ap)
+#else
+vscanf(const char *fmt, va_list ap)
+#endif
+{
+	rmutex_t	*lk;
+	int	ret;
+
+	FLOCKFILE(lk, stdin);
+
+	_SET_ORIENTATION_BYTE(stdin);
+
+#ifdef _C89_INTMAX32
+	ret = __doscan_u(stdin, fmt, ap, _F_INTMAX32);
+#else
+	ret = __doscan_u(stdin, fmt, ap, 0);
+#endif
+
+	FUNLOCKFILE(lk);
+	return (ret);
+}
+
+int
+#ifdef _C89_INTMAX32	/* _C89_INTMAX32 version in 32-bit libc only */
+_vfscanf_c89(FILE *iop, const char *fmt, va_list ap)
+#else
+vfscanf(FILE *iop, const char *fmt, va_list ap)
+#endif
+{
+	rmutex_t	*lk;
+	int	ret;
+
+	FLOCKFILE(lk, iop);
+
+	_SET_ORIENTATION_BYTE(iop);
+
+#ifdef _C89_INTMAX32
+	ret = __doscan_u(iop, fmt, ap, _F_INTMAX32);
+#else
+	ret = __doscan_u(iop, fmt, ap, 0);
+#endif
+	FUNLOCKFILE(lk);
+	return (ret);
+}
+
+int
+#ifdef _C89_INTMAX32	/* _C89_INTMAX32 version in 32-bit libc only */
+_vsscanf_c89(const char *str, const char *fmt, va_list ap)
+#else
+vsscanf(const char *str, const char *fmt, va_list ap)
+#endif
+{
+	FILE strbuf;
+
+	/*
+	 * The dummy FILE * created for sscanf has the _IOWRT
+	 * flag set to distinguish it from scanf and fscanf
+	 * invocations.
+	 */
+	strbuf._flag = _IOREAD | _IOWRT;
+	strbuf._ptr = strbuf._base = (unsigned char *)str;
+	strbuf._cnt = strlen(str);
+	strbuf._file = _NFILE;
+
+	/*
+	 * Mark the stream so that routines called by __doscan_u()
+	 * do not do any locking. In particular this avoids a NULL
+	 * lock pointer being used by getc() causing a core dump.
+	 * See bugid -  1210179 program SEGV's in sscanf if linked with
+	 * the libthread.
+	 * This also makes sscanf() quicker since it does not need
+	 * to do any locking.
+	 */
+	if (__fsetlocking(&strbuf, FSETLOCKING_BYCALLER) == -1) {
+		return (-1);	/* this should never happen */
+	}
+
+	/* as this stream is local to this function, no locking is be done */
+#ifdef _C89_INTMAX32
+	return (__doscan_u(&strbuf, fmt, ap, _F_INTMAX32));
+#else
+	return (__doscan_u(&strbuf, fmt, ap, 0));
+#endif
+}