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metachar.h revision 1.3 
      1 /*	$NetBSD: metachar.h,v 1.3 2015/06/19 14:32:04 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2015 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Christos Zoulas.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 #ifndef _METACHAR_H
     32 #define _METACHAR_H
     33 
     34 #include <sys/cdefs.h>
     35 #include <ctype.h>
     36 
     37 __BEGIN_DECLS
     38 extern unsigned char _metachar[];
     39 
     40 #define ismeta(c)	_metachar[(c) & 0x7f]
     41 
     42 static inline int
     43 hasmeta(const char *cmd)
     44 {
     45 	while (!ismeta(*cmd))
     46 		cmd++;
     47 
     48 	return *cmd != '\0';
     49 }
     50 
     51 static inline int
     52 needshell(const char *cmd, int white)
     53 {
     54 	while (!ismeta(*cmd) && *cmd != ':' && *cmd != '=') {
     55 		if (white && isspace((unsigned char)*cmd))
     56 			break;
     57 		cmd++;
     58 	}
     59 
     60 	return *cmd != '\0';
     61 }
     62 __END_DECLS
     63 
     64 #endif /* _METACHAR_H */
     65