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
|
/* Set a file's translator.
Copyright (C) 1995 Free Software Foundation, Inc.
Written by Miles Bader <miles@gnu.ai.mit.edu>
This program 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.
This program 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 <hurd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <argp.h>
#include <fcntl.h>
#include <unistd.h>
#include <error.h>
#include <argz.h>
#include <hurd/fshelp.h>
static struct argp_option options[] =
{
{"active", 'a', 0, 0, "Set NODE's active translator"},
{"passive", 'p', 0, 0, "Set NODE's passive translator"},
{"keep-active", 'k', 0, 0, "Keep any currently running active translator"
" when setting the passive translator"},
{"create", 'c', 0, 0, "Create NODE if it doesn't exist"},
{"goaway", 'g', 0, 0, "Make any existing translator go away"},
{"recursive", 'R', 0, 0, "When killing an old translator, shutdown its children too"},
{"force", 'f', 0, 0, "If an old active translator doesn't want to die, force it"},
{"nosync", 'S', 0, 0, "Don't sync any existing translator's state before killing it"},
{"dereference", 'L', 0, 0, "If a translator exists, put the new one on top"},
{0, 0}
};
static char *args_doc = "NODE [TRANSLATOR ARG...]";
static char *doc = "By default, the passive translator is set, and any \
active translator told to just go away.";
/* ---------------------------------------------------------------- */
void
main(int argc, char *argv[])
{
error_t err;
/* The filesystem node we're putting a translator on. */
char *node_name = 0;
file_t node;
/* The translator's arg vector, in '\0' separated format. */
char *argz = 0;
int argz_len = 0;
/* The control port for any active translator we start up. */
fsys_t active_control = MACH_PORT_NULL;
/* Flags to pass to file_set_translator. By default we only set a
translator if there's no existing one. */
int flags = FS_TRANS_SET | FS_TRANS_EXCL;
int lookup_flags = O_NOTRANS;
int goaway_flags = 0;
/* Various option flags. */
int passive = 0, active = 0, keep_active = 0;
/* Parse our options... */
error_t parse_opt (int key, char *arg, struct argp_state *state)
{
switch (key)
{
case ARGP_KEY_ARG:
node_name = arg;
err = argz_create (state->argv + state->index, &argz, &argz_len);
if (err)
error(3, err, "Can't create options vector");
state->index = state->argc; /* stop parsing */
break;
case ARGP_KEY_NO_ARGS:
argp_usage (state->argp); /* exits */
case 'a': active = 1; break;
case 'p': passive = 1; break;
case 'k': keep_active = 1; break;
case 'c': lookup_flags |= O_CREAT; break;
case 'L': lookup_flags &= ~O_NOTRANS; break;
case 'g': flags &= ~FS_TRANS_EXCL; break;
case 'R': goaway_flags |= FSYS_GOAWAY_RECURSE; break;
case 'S': goaway_flags |= FSYS_GOAWAY_NOSYNC; break;
case 'f': goaway_flags |= FSYS_GOAWAY_FORCE; break;
default:
return EINVAL;
}
return 0;
}
struct argp argp = {options, parse_opt, args_doc, doc};
argp_parse (&argp, argc, argv, 0, 0);
if (!active && !passive)
passive = 1;
if (active && argz_len > 0)
{
/* The callback to start_translator opens NODE as a side effect. */
error_t open_node (int flags,
mach_port_t *underlying,
mach_msg_type_name_t *underlying_type)
{
node = file_name_lookup (node_name, flags | lookup_flags, 0666);
if (node == MACH_PORT_NULL)
return errno;
*underlying = node;
*underlying_type = MACH_MSG_TYPE_COPY_SEND;
return 0;
}
err = fshelp_start_translator (open_node, argz, argz, argz_len, 60000,
&active_control);
if (err)
error(4, err, "%s", argz);
}
else
{
node = file_name_lookup(node_name, lookup_flags, 0666);
if (node == MACH_PORT_NULL)
error(1, errno, "%s", node_name);
}
err =
file_set_translator(node,
passive ? flags : 0,
(active || !keep_active) ? flags : 0,
goaway_flags,
argz, argz_len,
active_control, MACH_MSG_TYPE_MOVE_SEND);
if (err)
error(5, err, "%s", node_name);
exit(0);
}
|
