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
|
/* Multiplexing filesystems by user
Copyright (C) 1997, 2000 Free Software Foundation, Inc.
Written by Miles Bader <miles@gnu.ai.mit.edu>
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., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#include <unistd.h>
#include <argp.h>
#include <argz.h>
#include <error.h>
#include <sys/time.h>
#include <hurd/paths.h>
#include "usermux.h"
int netfs_maxsymlinks = 25;
volatile struct mapped_time_value *usermux_mapped_time;
#define OPT_USER_PAT 1
#define OPT_HOME_PAT 2
#define OPT_UID_PAT 3
/* Startup options. */
static const struct argp_option options[] =
{
{ "user-pattern", OPT_USER_PAT, "PAT", 0,
"The string to replace in the translator specification with the user name"
" (default `${user}')" },
{ "home-pattern", OPT_HOME_PAT, "PAT", 0,
"The string to replace in the translator specification with the user's"
" home directory (default `${home}')" },
{ "uid-pattern", OPT_UID_PAT, "PAT", 0,
"The string to replace in the translator specification with the uid"
" (default `${uid}')" },
{ "clear-patterns", 'C', 0, 0,
"Reset all patterns to empty; this option may then be followed by options"
" to set specific patterns" },
{ 0 }
};
static const char args_doc[] = "[TRANSLATOR [ARG...]]";
static const char doc[] =
"A translator for invoking user-specific translators"
"\vThis translator appears like a directory in which user names can be"
" looked up, and will start TRANSLATOR to service each resulting node."
" If no pattern occurs in the translator specification, the users's"
" home directory is appended to it instead; TRANSLATOR defaults to"
" " _HURD_SYMLINK ".";
int
main (int argc, char **argv)
{
error_t err;
struct stat ul_stat;
mach_port_t bootstrap;
struct usermux mux =
{ user_pat: "${user}", home_pat: "${home}", uid_pat: "${uid}" };
struct netnode root_nn = { mux: &mux };
error_t parse_opt (int key, char *arg, struct argp_state *state)
{
switch (key)
{
case OPT_USER_PAT: mux.user_pat = arg; break;
case OPT_HOME_PAT: mux.home_pat = arg; break;
case OPT_UID_PAT: mux.uid_pat = arg; break;
case 'C': bzero (&mux, sizeof mux); break;
case ARGP_KEY_NO_ARGS:
bzero (&mux, sizeof mux); /* Default doesn't use them; be careful. */
return argz_create_sep (_HURD_SYMLINK, 0,
&mux.trans_template, &mux.trans_template_len);
case ARGP_KEY_ARGS:
/* Steal the entire tail of arg vector for our own use. */
return argz_create (state->argv + state->next,
&mux.trans_template, &mux.trans_template_len);
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
struct argp argp = { options, parse_opt, args_doc, doc };
/* Parse our command line arguments. */
argp_parse (&argp, argc, argv, 0, 0, 0);
task_get_bootstrap_port (mach_task_self (), &bootstrap);
netfs_init ();
/* Create the root node (some attributes initialized below). */
netfs_root_node = netfs_make_node (&root_nn);
if (! netfs_root_node)
error (5, ENOMEM, "Cannot create root node");
err = maptime_map (0, 0, &usermux_maptime);
if (err)
error (6, err, "Cannot map time");
/* Handshake with the party trying to start the translator. */
mux.underlying = netfs_startup (bootstrap, 0);
/* We inherit various attributes from the node underlying this translator. */
err = io_stat (mux.underlying, &ul_stat);
if (err)
error (7, err, "Cannot stat underlying node");
/* MUX.stat_template contains some fields that are inherited by all nodes
we create. */
mux.stat_template.st_uid = ul_stat.st_uid;
mux.stat_template.st_gid = ul_stat.st_gid;
mux.stat_template.st_author = ul_stat.st_author;
mux.stat_template.st_fsid = getpid ();
mux.stat_template.st_nlink = 1;
mux.stat_template.st_fstype = FSTYPE_MISC;
/* We implement symlinks directly, and everything else as a real
translator. */
if (strcmp (mux.trans_template, _HURD_SYMLINK) == 0)
mux.stat_template.st_mode = S_IFLNK | 0666;
else
mux.stat_template.st_mode = S_IFREG | S_IPTRANS | 0666;
/* Initialize the root node's stat information. */
netfs_root_node->nn_stat = mux.stat_template;
netfs_root_node->nn_stat.st_ino = 2;
netfs_root_node->nn_stat.st_mode =
S_IFDIR | (ul_stat.st_mode & ~S_IFMT & ~S_ITRANS);
fshelp_touch (&netfs_root_node->nn_stat, TOUCH_ATIME|TOUCH_MTIME|TOUCH_CTIME,
usermux_maptime);
for (;;) /* ?? */
netfs_server_loop ();
}
|
