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
|
/*
* vio-type - identify type of a VIO device
*
* Copyright © 2006 Canonical Ltd.
* Author: Scott James Remnant <scott@ubuntu.com>
* Copyright © 2010 Marco d'Itri <md@linux.it>
*
* 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 version 2 of the License.
*
* 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.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include "libudev.h"
#include "libudev-private.h"
static int debug;
static void log_fn(struct udev *udev, int priority,
const char *file, int line, const char *fn,
const char *format, va_list args)
{
if (debug) {
fprintf(stderr, "%s: ", fn != NULL ? fn : file);
vfprintf(stderr, format, args);
} else {
vsyslog(priority, format, args);
}
}
int main(int argc, char *argv[])
{
static const struct option options[] = {
{ "export", no_argument, NULL, 'e' },
{ "debug", no_argument, NULL, 'd' },
{ "help", no_argument, NULL, 'h' },
{}
};
struct udev *udev;
struct stat buf;
const char *devpath = NULL;
char filename[UTIL_PATH_SIZE], devspec[256], devtype[256];
int export = 0;
int rc = 1;
int i, fd, len;
udev = udev_new();
if (udev == NULL)
goto exit;
udev_log_init("vio_type");
udev_set_log_fn(udev, log_fn);
while (1) {
int option;
option = getopt_long(argc, argv, "edh", options, NULL);
if (option == -1)
break;
switch (option) {
case 'e':
export = 1;
break;
case 'd':
debug = 1;
if (udev_get_log_priority(udev) < LOG_INFO)
udev_set_log_priority(udev, LOG_INFO);
break;
case 'h':
printf("Usage: vio_type [--debug] [--help] <devpath>\n"
" --debug print debug information\n"
" --help print this help text\n\n");
default:
goto exit;
}
}
devpath = argv[optind];
if (devpath == NULL) {
err(udev, "No device specified");
rc = 2;
goto exit;
}
util_strscpyl(filename, sizeof(filename), udev_get_sys_path(udev),
devpath, "/devspec", NULL);
fd = open(filename, O_RDONLY);
if (fd < 0) {
err(udev, "unable to open '%s'", filename);
goto exit;
}
len = read(fd, devspec, sizeof(devspec));
if (len <= 0) {
#if !defined(__sparc__) && !defined(__sparc64__)
err(udev, "unable to read from '%s'", filename);
#endif
goto close;
}
devspec[len] = '\0';
if (devspec[len-1] == '\n')
devspec[len-1] = '\0';
close(fd);
#if !defined(__sparc__) && !defined(__sparc64__)
/* now we look in /proc */
util_strscpyl(filename, sizeof(filename), "/proc/device-tree",
devspec, "/device_type", NULL);
/* hang around for /proc to catch up */
for (i = 100; i; i--) {
if (stat(filename, &buf) == 0)
break;
usleep(30000);
}
fd = open(filename, O_RDONLY);
if (fd < 0) {
err(udev, "unable to open '%s'", filename);
goto exit;
}
len = read(fd, devtype, sizeof(devtype));
if (len <= 0) {
err(udev, "unable to read from '%s'", filename);
goto close;
}
devtype[len] = '\0';
if (devtype[len-1] == '\n')
devtype[len-1] = '\0';
#else
strncpy(devtype,devspec,strlen(devspec)+1);
#endif
if (export) {
printf("VIO_TYPE=%s\n", devtype);
} else {
printf("%s\n", devtype);
}
rc = 0;
close:
close(fd);
exit:
udev_unref(udev);
udev_log_close();
return rc;
}
|
