1 /* vi: set sw=4 ts=4: */
3 * Adapted from ash applet code
5 * This code is derived from software contributed to Berkeley by
8 * Copyright (c) 1989, 1991, 1993, 1994
9 * The Regents of the University of California. All rights reserved.
11 * Copyright (c) 1997-2005 Herbert Xu <herbert@gondor.apana.org.au>
12 * was re-ported from NetBSD and debianized.
14 * Copyright (c) 2010 Denys Vlasenko
17 * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
20 #include "shell_common.h"
22 const char defifsvar[] ALIGN1 = "IFS= \t\n";
25 int FAST_FUNC is_well_formed_var_name(const char *s, char terminator)
27 if (!s || !(isalpha(*s) || *s == '_'))
32 while (isalnum(*s) || *s == '_');
34 return *s == terminator;