1 /* Copyright (C) 2004       Manuel Novoa III    <mjn3@codepoet.org>
2  *
3  * GNU Library General Public License (LGPL) version 2 or later.
4  *
5  * Dedicated to Toni.  See uClibc/DEDICATION.mjn3 for details.
6  */
7 
8 #include "_stdio.h"
9 
10 link_warning(gets, "the 'gets' function is dangerous and should not be used.")
11 
12 /* UNSAFE FUNCTION -- do not bother optimizing */
13 
14 /* disable macro, force actual function call */
15 #undef getchar_unlocked
16 
gets(char * s)17 char *gets(char *s)
18 {
19 	register char *p = s;
20 	int c;
21 	__STDIO_AUTO_THREADLOCK_VAR;
22 
23 	__STDIO_AUTO_THREADLOCK(stdin);
24 
25 	/* Note: don't worry about performance here... this shouldn't be used!
26 	 * Therefore, force actual function call. */
27 	while (((c = getchar_unlocked()) != EOF) && ((*p = c) != '\n')) {
28 		++p;
29 	}
30 	if ((c == EOF) || (s == p)) {
31 		s = NULL;
32 	} else {
33 		*p = 0;
34 	}
35 
36 	__STDIO_AUTO_THREADUNLOCK(stdin);
37 
38 	return s;
39 }
40