xref: /freebsd/lib/libc/stdio/scanf.c (revision ce51cf0392a0b2cc80e5ddcdb01394a303093443)
1 /*-
2  * Copyright (c) 1990, 1993
3  *	The Regents of the University of California.  All rights reserved.
4  *
5  * This code is derived from software contributed to Berkeley by
6  * Chris Torek.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  * 3. All advertising materials mentioning features or use of this software
17  *    must display the following acknowledgement:
18  *	This product includes software developed by the University of
19  *	California, Berkeley and its contributors.
20  * 4. Neither the name of the University nor the names of its contributors
21  *    may be used to endorse or promote products derived from this software
22  *    without specific prior written permission.
23  *
24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34  * SUCH DAMAGE.
35  */
36 
37 #if defined(LIBC_SCCS) && !defined(lint)
38 #if 0
39 static char sccsid[] = "@(#)scanf.c	8.1 (Berkeley) 6/4/93";
40 #endif
41 static const char rcsid[] =
42 		"$Id$";
43 #endif /* LIBC_SCCS and not lint */
44 
45 #include <stdio.h>
46 #if __STDC__
47 #include <stdarg.h>
48 #else
49 #include <varargs.h>
50 #endif
51 #ifdef _THREAD_SAFE
52 #include <pthread.h>
53 #include "pthread_private.h"
54 #endif
55 
56 #if __STDC__
57 int
58 scanf(char const *fmt, ...)
59 #else
60 int
61 scanf(fmt, va_alist)
62 	char *fmt;
63 	va_dcl
64 #endif
65 {
66 	int ret;
67 	va_list ap;
68 
69 #if __STDC__
70 	va_start(ap, fmt);
71 #else
72 	va_start(ap);
73 #endif
74 #ifdef _THREAD_SAFE
75 	_thread_flockfile(stdin,__FILE__,__LINE__);
76 #endif
77 	ret = __svfscanf(stdin, fmt, ap);
78 	va_end(ap);
79 #ifdef _THREAD_SAFE
80 	_thread_funlockfile(stdin);
81 #endif
82 	return (ret);
83 }
84