1 /* dock.c- built-in Dock module for WindowMaker
2 *
3 * WindowMaker window manager
4 *
5 * Copyright (c) 1997 Alfredo K. Kojima
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22 #include <stdlib.h>
23 #include <string.h>
24 #include "list.h"
25 #include "misc.h"
26
27 /*
28 *----------------------------------------------------------------------
29 * parse_command--
30 * Divides a command line into a argv/argc pair.
31 *----------------------------------------------------------------------
32 */
33 #define PRC_ALPHA 0
34 #define PRC_BLANK 1
35 #define PRC_ESCAPE 2
36 #define PRC_DQUOTE 3
37 #define PRC_EOS 4
38 #define PRC_SQUOTE 5
39
40 typedef struct {
41 short nstate;
42 short output;
43 } DFA;
44
45
46 static DFA mtable[9][6] = {
47 {{3,1},{0,0},{4,0},{1,0},{8,0},{6,0}},
48 {{1,1},{1,1},{2,0},{3,0},{5,0},{1,1}},
49 {{1,1},{1,1},{1,1},{1,1},{5,0},{1,1}},
50 {{3,1},{5,0},{4,0},{1,0},{5,0},{6,0}},
51 {{3,1},{3,1},{3,1},{3,1},{5,0},{3,1}},
52 {{-1,-1},{0,0},{0,0},{0,0},{0,0},{0,0}}, /* final state */
53 {{6,1},{6,1},{7,0},{6,1},{5,0},{3,0}},
54 {{6,1},{6,1},{6,1},{6,1},{5,0},{6,1}},
55 {{-1,-1},{0,0},{0,0},{0,0},{0,0},{0,0}}, /* final state */
56 };
57
58 char*
next_token(char * word,char ** next)59 next_token(char *word, char **next)
60 {
61 char *ptr;
62 char *ret, *t;
63 int state, ctype;
64
65 t = ret = malloc(strlen(word)+1);
66 ptr = word;
67
68 state = 0;
69 *t = 0;
70 while (1) {
71 if (*ptr==0)
72 ctype = PRC_EOS;
73 else if (*ptr=='\\')
74 ctype = PRC_ESCAPE;
75 else if (*ptr=='"')
76 ctype = PRC_DQUOTE;
77 else if (*ptr=='\'')
78 ctype = PRC_SQUOTE;
79 else if (*ptr==' ' || *ptr=='\t')
80 ctype = PRC_BLANK;
81 else
82 ctype = PRC_ALPHA;
83
84 if (mtable[state][ctype].output) {
85 *t = *ptr; t++;
86 *t = 0;
87 }
88 state = mtable[state][ctype].nstate;
89 ptr++;
90 if (mtable[state][0].output<0) {
91 break;
92 }
93 }
94
95 if (*ret==0)
96 t = NULL;
97 else
98 t = strdup(ret);
99
100 free(ret);
101
102 if (ctype==PRC_EOS)
103 *next = NULL;
104 else
105 *next = ptr;
106
107 return t;
108 }
109
110
111 extern void
parse_command(char * command,char *** argv,int * argc)112 parse_command(char *command, char ***argv, int *argc)
113 {
114 LinkedList *list = NULL;
115 char *token, *line;
116 int count, i;
117
118 line = command;
119 do {
120 token = next_token(line, &line);
121 if (token) {
122 list = list_cons(token, list);
123 }
124 } while (token!=NULL && line!=NULL);
125
126 count = list_length(list);
127 *argv = malloc(sizeof(char*)*count);
128 i = count;
129 while (list!=NULL) {
130 (*argv)[--i] = list->head;
131 list_remove_head(&list);
132 }
133 *argc = count;
134 }
135
136 extern pid_t
execCommand(char * command)137 execCommand(char *command)
138 {
139 pid_t pid;
140 char **argv;
141 int argc;
142
143 parse_command(command, &argv, &argc);
144
145 if (argv==NULL) {
146 return 0;
147 }
148
149 if ((pid=fork())==0) {
150 char **args;
151 int i;
152
153 args = malloc(sizeof(char*)*(argc+1));
154 if (!args)
155 exit(10);
156 for (i=0; i<argc; i++) {
157 args[i] = argv[i];
158 }
159 args[argc] = NULL;
160 execvp(argv[0], args);
161 exit(10);
162 }
163 return pid;
164 }
165