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
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
|
/*
* Copyright © 1988-2008 Keith Packard and Bart Massey.
* All Rights Reserved. See the file COPYING in this directory
* for licensing information.
*/
/*
* builtin-process.c
*
* provide builtin functions for the PID namespace
*/
#include <unistd.h>
#include <sys/types.h>
#include <errno.h>
#include <grp.h>
#include "builtin.h"
NamespacePtr PIDNamespace;
static Value
do_PID_getuid (void)
{
ENTER ();
RETURN (NewInt (getuid()));
}
static Value
do_PID_geteuid (void)
{
ENTER ();
RETURN (NewInt (geteuid()));
}
static Value
do_PID_getgid (void)
{
ENTER ();
RETURN (NewInt (getgid()));
}
static Value
do_PID_getegid (void)
{
ENTER ();
RETURN (NewInt (getegid()));
}
static Value
error (Value value)
{
int err = errno;
RaiseStandardException (exception_system_error, 3,
FileGetErrorMessage (err),
NewInt (err), value);
return Void;
}
static Value
do_PID_getgroups (void)
{
ENTER ();
int n;
gid_t *list;
Value ret;
int i;
n = getgroups (0, NULL);
list = AllocateTemp (n * sizeof (gid_t));
if (getgroups (n, list) < 0)
RETURN(error(NewInt(n)));
ret = NewArray (False, False, typePrim[rep_integer], 1, &n);
for (i = 0; i < n; i++)
ArrayValueSet(&ret->array, i, NewInt (list[i]));
RETURN (ret);
}
static Value
do_PID_getpid (void)
{
ENTER ();
RETURN (NewInt (getpid()));
}
static Value
do_PID_setuid (Value uid)
{
ENTER ();
int u = IntPart (uid, "Invalid uid");
if (aborting)
RETURN(Void);
if (setuid (u) < 0)
RETURN (error (uid));
RETURN (Void);
}
static Value
do_PID_seteuid (Value euid)
{
ENTER ();
int u = IntPart (euid, "Invalid euid");
if (aborting)
RETURN(Void);
if (seteuid (u) < 0)
RETURN (error (euid));
RETURN (Void);
}
static Value
do_PID_setgid (Value gid)
{
ENTER ();
int u = IntPart (gid, "Invalid gid");
if (aborting)
RETURN(Void);
if (setgid (u) < 0)
RETURN (error (gid));
RETURN (Void);
}
static Value
do_PID_setegid (Value egid)
{
ENTER ();
int u = IntPart (egid, "Invalid egid");
if (aborting)
RETURN(Void);
if (setegid (u) < 0)
RETURN (error (egid));
RETURN (Void);
}
static Value
do_PID_setgroups (Value groups)
{
ENTER ();
int n;
int i;
gid_t *g;
n = ArrayLimits (&groups->array)[0];
g = AllocateTemp (n * sizeof (gid_t));
for (i = 0; i < n; i++) {
g[i] = IntPart (ArrayValueGet (&groups->array, i), "Invalid gid");
if (aborting)
RETURN(Void);
}
if (setgroups (n, g) < 0)
RETURN (error (groups));
RETURN (Void);
}
void
import_PID_namespace (void)
{
ENTER ();
static const struct fbuiltin_0 funcs_0[] = {
{ do_PID_getuid, "getuid", "i", "", "\n"
" int getuid ()\n"
"\n"
" Return the current uid\n" },
{ do_PID_geteuid, "geteuid", "i", "", "\n"
" int geteuid ()\n"
"\n"
" Return the current effective uid\n" },
{ do_PID_getgid, "getgid", "i", "", "\n"
" int getgid ()\n"
"\n"
" Return the current gid\n" },
{ do_PID_getegid, "getegid", "i", "", "\n"
" int getegid ()\n"
"\n"
" Return the current effective gid\n" },
{ do_PID_getgroups, "getgroups", "Ai", "", "\n"
" int[*] getgroups ()\n"
"\n"
" Return the list of additional groups\n" },
{ do_PID_getpid, "getpid", "i", "", "\n"
" int getpid ()\n"
"\n"
" Return the current process id." },
{ 0 }
};
static const struct fbuiltin_1 funcs_1[] = {
{ do_PID_setuid, "setuid", "v", "i", "\n"
" void setuid (int uid)\n"
"\n"
" Set the current uid." },
{ do_PID_seteuid, "seteuid", "v", "i", "\n"
" void seteuid (int euid)\n"
"\n"
" Set the current euid." },
{ do_PID_setgid, "setgid", "v", "i", "\n"
" void setgid (int gid)\n"
"\n"
" Set the current gid." },
{ do_PID_setegid, "setegid", "v", "i", "\n"
" void setegid (int egid)\n"
"\n"
" Set the current egid." },
{ do_PID_setgroups, "setgroups", "v", "Ai", "\n"
" void setgroups (int[*] groups)\n"
"\n"
" Set the list of additional groups." },
{ 0 }
};
static const struct ebuiltin excepts[] = {
{"system_error", exception_system_error, "sEp", "\n"
" system_error (string message, error_type error, poly value)\n"
"\n"
" Raised when a system function fails.\n"
" 'message' is a printable error string.\n"
" 'error' is a symbolic error code.\n"
" 'value' is the value which failed.\n" },
{ 0, 0, 0, 0 },
};
const struct ebuiltin *e;
PIDNamespace = BuiltinNamespace (/*parent*/ 0, "PID")->namespace.namespace;
for (e = excepts; e->name; e++)
BuiltinAddException (&PIDNamespace, e->exception, e->name, e->args, e->doc);
BuiltinFuncs0 (&PIDNamespace, funcs_0);
BuiltinFuncs1 (&PIDNamespace, funcs_1);
EXIT ();
}
|
