1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 
23 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
24 /*	  All Rights Reserved  	*/
25 
26 /*
27  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
28  * Use is subject to license terms.
29  */
30 
31 #pragma ident	"%Z%%M%	%I%	%E% SMI"
32 /*LINTLIBRARY*/
33 
34 #include "c_synonyms.h"
35 #include <sys/types.h>
36 #include <ctype.h>
37 #include "libmail.h"
38 
39 #define	TRUE	1
40 #define	FALSE	0
41 
42 char **
43 setup_exec(char *s)
44 {
45 	char	*p = s, *q;
46 	static char	*argvec[256]; /* is this enough? */
47 	int	i = 0;
48 	int	stop;
49 	int	ignorespace = FALSE;
50 
51 	/* Parse up string into arg. vec. for subsequent exec. Assume */
52 	/* whitespace delimits args. Any non-escaped double quotes will */
53 	/* be used to group multiple whitespace-delimited tokens into */
54 	/* a single exec arg. */
55 	p = skipspace(p);
56 	while (*p) {
57 		q = p;
58 		stop = FALSE;
59 		while (*q && (stop == FALSE)) {
60 		    again:
61 			switch (*q) {
62 			case '\\':
63 				/* Slide command string 1 char to left */
64 				strmove(q, q+1);
65 				break;
66 			case '"':
67 				ignorespace = ((ignorespace == TRUE) ?
68 								FALSE : TRUE);
69 				/* Slide command string 1 char to left */
70 				strmove(q, q+1);
71 				goto again;
72 			default:
73 				if (isspace((int)*q) &&
74 				    (ignorespace == FALSE)) {
75 					stop = TRUE;
76 					continue;
77 				}
78 				break;
79 			}
80 			q++;
81 		}
82 		if (*q == '\0') {
83 			argvec[i++] = p;
84 			break;
85 		}
86 		*q++ = '\0';
87 		argvec[i++] = p;
88 		p = skipspace(q);
89 	}
90 	argvec[i] = NULL;
91 	if (i == 0) {
92 		return (NULL);
93 	}
94 	return (argvec);
95 }
96