1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include "../fs/fs.h"
void hello() {
puts(
"Welcome to FoolShell v0.1"
);
}
void prompt() {
printf(
"$ "
);
}
int main(int argc, char **argv)
{
// hello();
char *buf=malloc(256);
while(1)
{
prompt();
fgets(buf,255,stdin);
buf[strlen(buf)-1]=0; // remove \n
process(buf);
}
return 0;
}
char **tokenize(char *buf)
{
char **token;
token=malloc(10*sizeof(char*));
int l=strlen(buf);
int i;
int c=0;
for(i=0;i<l;i++)
{
// init space for next token
token[c]=malloc(256);
//skip all the whitespace
while(buf[i]==' '&&i<l)i++;
if(i==l)break;
//get token
int t=0;
while(buf[i]!=' '&&i<l)
{
token[c][t]=buf[i];
t++;
i++;
}
token[c][t]=0;
// printf("token %i : <%s>\n",c, token[c]);
c++;
token[c]=NULL;
}
return token;
}
int process(char *buf)
{
char **token=tokenize(buf);
char *command=token[0];
// puts(command);
// copied from trottelshell
if(!strcmp(command,"help"))
{
puts("foolshell: supported built-in commands: 'help', 'echo [string]', 'ls [inode_nr]', exec [inode_nr],'malloc [bytes]', 'free [address]', 'getenv [var]', 'putenv [var] [val]'");
}
else if(!strcmp(command,"ls"))
{
fs_dirent *dirs=malloc(sizeof(fs_dirent)*25);
int ls=readdir(atoi(token[1]),dirs,25);
int i;
for(i=0;i<ls;i++)
{
printf("foolshell: %i %s%c\n",dirs[i].inode, dirs[i].name, ((dirs[i].type==FS_FILE_TYPE_DIR)?'/':' '));
}
}
else if(!strcmp(command,"exec"))
{
execve(atoi(token[1]),token,0);
}
else if(!strcmp(command,"echo"))
{
printf("foolshell: \"%s\"\n",token[1]);
}
else if(!strcmp(command,"malloc"))
{
uint8_t *mall=malloc(atoi(token[1]));
printf("foolshell: allocated %d bytes at 0x%08X (%i).\n",atoi(token[1]),mall,mall);
}
else if(!strcmp(command,"free"))
{
free(atoi(token[1]));
printf("foolshell: called free(0x%08X).\n",atoi(token[1]));
}
else if(!strcmp(command,"getenv"))
{
printf("foolshell: %s = %s \n",token[1],getenv(token[1]));
}
else if(!strcmp(command,"putenv"))
{
char buf[256];
sprintf(buf,"%s=%s",token[1],token[2]);
putenv(buf);
printf("foolshell: %s = %s \n",token[1],getenv(token[1]));
}
else
{
puts("foolshell: command not found");
}
//
}
|
