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 (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
28 /*	  All Rights Reserved  	*/
29 
30 #pragma ident	"%Z%%M%	%I%	%E% SMI"
31 
32 #include <sys/types.h>
33 #include <ctype.h>
34 #include "libmail.h"
35 
36 #define	TRUE	1
37 #define	FALSE	0
38 
39 char **
setup_exec(char * s)40 setup_exec(char *s)
41 {
42 	char	*p = s, *q;
43 	static char	*argvec[256]; /* is this enough? */
44 	int	i = 0;
45 	int	stop;
46 	int	ignorespace = FALSE;
47 
48 	/* Parse up string into arg. vec. for subsequent exec. Assume */
49 	/* whitespace delimits args. Any non-escaped double quotes will */
50 	/* be used to group multiple whitespace-delimited tokens into */
51 	/* a single exec arg. */
52 	p = skipspace(p);
53 	while (*p) {
54 		q = p;
55 		stop = FALSE;
56 		while (*q && (stop == FALSE)) {
57 		again:
58 			switch (*q) {
59 			case '\\':
60 				/* Slide command string 1 char to left */
61 				strmove(q, q+1);
62 				break;
63 			case '"':
64 				ignorespace = ((ignorespace == TRUE) ?
65 				    FALSE : TRUE);
66 				/* Slide command string 1 char to left */
67 				strmove(q, q+1);
68 				goto again;
69 			default:
70 				if (isspace((int)*q) &&
71 				    (ignorespace == FALSE)) {
72 					stop = TRUE;
73 					continue;
74 				}
75 				break;
76 			}
77 			q++;
78 		}
79 		if (*q == '\0') {
80 			argvec[i++] = p;
81 			break;
82 		}
83 		*q++ = '\0';
84 		argvec[i++] = p;
85 		p = skipspace(q);
86 	}
87 	argvec[i] = NULL;
88 	if (i == 0) {
89 		return (NULL);
90 	}
91 	return (argvec);
92 }
93