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
|
/* Parse standard run-time options
Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
The GNU Hurd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <argp.h>
#include "priv.h"
#define SUID_OK_OPT 600
#define EXEC_OK_OPT 601
static const struct argp_option
std_runtime_options[] =
{
{"update", 'u', 0, 0, "Flush any meta-data cached in core"},
{"remount", 0, 0, OPTION_HIDDEN | OPTION_ALIAS}, /* deprecated */
{"suid-ok", OPT_SUID_OK, 0, 0, "Enable set-uid execution"},
{"exec-ok", OPT_EXEC_OK, 0, 0, "Enable execution of files"},
{0, 0}
};
struct parse_hook
{
int readonly, sync, sync_interval, remount, nosuid, noexec;
};
/* Implement the options in H, and free H. */
static error_t
set_opts (struct parse_hook *h)
{
error_t err = 0;
/* Do things in this order: remount, change readonly, change-sync; always
do the remount while the disk is readonly, even if only temporarily. */
if (h->remount)
{
/* We can only remount while readonly. */
err = diskfs_set_readonly (1);
if (!err)
err = diskfs_remount ();
}
if (h->readonly != diskfs_readonly)
if (err)
diskfs_set_readonly (h->readonly); /* keep the old error. */
else
err = diskfs_set_readonly (h->readonly);
/* Change sync mode. */
if (h->sync)
{
diskfs_synchronous = 1;
diskfs_set_sync_interval (0); /* Don't waste time syncing. */
}
else
{
diskfs_synchronous = 0;
if (h->sync_interval >= 0)
diskfs_set_sync_interval (h->sync_interval);
}
if (h->nosuid != -1)
nosuid = h->nosuid;
if (h->noexec != -1)
noexec = h->noexec;
free (h);
return err;
}
/* Parse diskfs standard runtime options. */
static error_t
parse_opt (int opt, char *arg, struct argp_state *state)
{
struct parse_hook *h = state->hook;
switch (opt)
{
case 'r': h->readonly = 1; break;
case 'w': h->readonly = 0; break;
case 'u': h->remount = 1; break;
case 'S': h->nosuid = 1; break;
case 'E': h->noexec = 1; break;
case OPT_SUID_OK: h->nosuid = 0; break;
case OPT_EXEC_OK: h->noexec = 0; break;
case 'n': h->sync_interval = 0; h->sync = 0; break;
case 's':
if (arg)
{
h->sync = 0;
h->sync_interval = atoi (arg);
}
else
h->sync = 1;
break;
case ARGP_KEY_INIT:
if (state->input)
state->hook = state->input; /* Share hook with parent. */
else
{
h = state->hook = malloc (sizeof (struct parse_hook));
if (! h)
return ENOMEM;
h->readonly = diskfs_readonly;
h->sync = diskfs_synchronous;
h->sync_interval = -1;
h->remount = 0;
h->nosuid = h->noexec = -1;
/* We know that we have one child, with which we share our hook. */
state->child_inputs[0] = h;
}
break;
case ARGP_KEY_ERROR:
if (! state->input)
free (h);
break;
case ARGP_KEY_SUCCESS:
if (! state->input)
return set_opts (h);
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
static const struct argp common_argp = { diskfs_common_options, parse_opt };
static const struct argp_child children[] = { {&common_argp}, {0} };
const struct argp diskfs_std_runtime_argp =
{
std_runtime_options, parse_opt, 0, 0, children
};
|
