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
|
/*
* udev.c
*
* Userspace devfs
*
* Copyright (C) 2003,2004 Greg Kroah-Hartman <greg@kroah.com>
*
* 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.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <ctype.h>
#include <signal.h>
#include "libsysfs/sysfs/libsysfs.h"
#include "udev.h"
#include "udev_version.h"
#include "logging.h"
#include "namedev.h"
/* global variables */
char **main_argv;
char **main_envp;
#ifdef LOG
unsigned char logname[42];
void log_message (int level, const char *format, ...)
{
va_list args;
// if (!udev_log)
// return;
/* FIXME use level... */
va_start(args, format);
vprintf(format, args);
va_end(args);
if (format[strlen(format)-1] != '\n')
printf("\n");
}
#endif
static void sig_handler(int signum)
{
switch (signum) {
case SIGINT:
case SIGTERM:
exit(20 + signum);
default:
dbg("unhandled signal");
}
}
static inline char *get_action(void)
{
char *action;
action = getenv("ACTION");
return action;
}
static inline char *get_devpath(void)
{
char *devpath;
devpath = getenv("DEVPATH");
return devpath;
}
static inline char *get_seqnum(void)
{
char *seqnum;
seqnum = getenv("SEQNUM");
return seqnum;
}
static char *subsystem_blacklist[] = {
"net",
"scsi_host",
"scsi_device",
"usb_host",
"pci_bus",
"",
};
static int udev_hotplug(int argc, char **argv)
{
char *devpath;
char *subsystem;
int retval = -EINVAL;
int i;
struct sigaction act;
devpath = argv[1];
if (!devpath) {
dbg("no devpath?");
goto exit;
}
dbg("looking at '%s'", devpath);
/* we only care about class devices and block stuff */
if (!strstr(devpath, "class") &&
!strstr(devpath, "block")) {
dbg("not a block or class device");
goto exit;
}
/* skip blacklisted subsystems */
subsystem = argv[1];
i = 0;
while (subsystem_blacklist[i][0] != '\0') {
if (strcmp(subsystem, subsystem_blacklist[i]) == 0) {
dbg("don't care about '%s' devices", subsystem);
goto exit;
}
i++;
}
/* initialize our configuration */
udev_init_config();
/* set up a default signal handler for now */
act.sa_handler = sig_handler;
sigemptyset (&act.sa_mask);
act.sa_flags = SA_RESTART;
sigaction(SIGINT, &act, NULL);
sigaction(SIGTERM, &act, NULL);
/* initialize the naming deamon */
namedev_init();
retval = udev_add_device(devpath, subsystem, 1);
exit:
if (retval > 0)
retval = 0;
return -retval;
}
int main(int argc, char **argv, char **envp)
{
main_argv = argv;
main_envp = envp;
dbg("version %s", UDEV_VERSION);
return udev_hotplug(argc, argv);
}
|
