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Commit | Line | Data |
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e8baccca | 1 | /* |
27b77df4 KS |
2 | * Copyright (C) 2003-2004 Greg Kroah-Hartman <greg@kroah.com> |
3 | * Copyright (C) 2004-2005 Kay Sievers <kay.sievers@vrfy.org> | |
e8baccca GKH |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License as published by the | |
7 | * Free Software Foundation version 2 of the License. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along | |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
27b77df4 | 16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
e8baccca GKH |
17 | * |
18 | */ | |
19 | ||
e8baccca GKH |
20 | #include <stdlib.h> |
21 | #include <string.h> | |
22 | #include <stdio.h> | |
23 | #include <fcntl.h> | |
24 | #include <unistd.h> | |
25 | #include <errno.h> | |
26 | #include <ctype.h> | |
6b493a20 | 27 | #include <syslog.h> |
e8baccca GKH |
28 | |
29 | #include "udev.h" | |
e8baccca GKH |
30 | |
31 | /* global variables */ | |
63f61c5c | 32 | char udev_root[PATH_SIZE]; |
63f61c5c | 33 | char udev_config_filename[PATH_SIZE]; |
9dd0c257 | 34 | char udev_rules_dir[PATH_SIZE]; |
6b493a20 | 35 | int udev_log_priority; |
821d0ec8 | 36 | int udev_run; |
e8baccca | 37 | |
28ce66de KS |
38 | static int get_key(char **line, char **key, char **value) |
39 | { | |
40 | char *linepos; | |
41 | char *temp; | |
42 | ||
43 | linepos = *line; | |
44 | if (!linepos) | |
45 | return -1; | |
46 | ||
47 | /* skip whitespace */ | |
48 | while (isspace(linepos[0])) | |
49 | linepos++; | |
50 | ||
51 | /* get the key */ | |
52 | *key = linepos; | |
53 | while (1) { | |
54 | linepos++; | |
55 | if (linepos[0] == '\0') | |
56 | return -1; | |
57 | if (isspace(linepos[0])) | |
58 | break; | |
59 | if (linepos[0] == '=') | |
60 | break; | |
61 | } | |
62 | ||
63 | /* terminate key */ | |
64 | linepos[0] = '\0'; | |
65 | linepos++; | |
66 | ||
67 | /* skip whitespace */ | |
68 | while (isspace(linepos[0])) | |
69 | linepos++; | |
70 | ||
71 | /* get the value*/ | |
72 | if (linepos[0] == '"') | |
73 | linepos++; | |
74 | else | |
75 | return -1; | |
76 | *value = linepos; | |
77 | ||
78 | temp = strchr(linepos, '"'); | |
79 | if (!temp) | |
80 | return -1; | |
81 | temp[0] = '\0'; | |
82 | ||
83 | return 0; | |
84 | } | |
85 | ||
e8baccca GKH |
86 | static int parse_config_file(void) |
87 | { | |
3e441450 | 88 | char line[LINE_SIZE]; |
89 | char *bufline; | |
28ce66de | 90 | char *linepos; |
e8baccca GKH |
91 | char *variable; |
92 | char *value; | |
c81b35c0 KS |
93 | char *buf; |
94 | size_t bufsize; | |
95 | size_t cur; | |
96 | size_t count; | |
97 | int lineno; | |
e8baccca | 98 | int retval = 0; |
c81b35c0 | 99 | |
63f61c5c | 100 | if (file_map(udev_config_filename, &buf, &bufsize) != 0) { |
c70560fe | 101 | err("can't open '%s' as config file: %s\n", udev_config_filename, strerror(errno)); |
e8baccca GKH |
102 | return -ENODEV; |
103 | } | |
104 | ||
105 | /* loop through the whole file */ | |
c81b35c0 KS |
106 | lineno = 0; |
107 | cur = 0; | |
3e441450 | 108 | while (cur < bufsize) { |
c81b35c0 | 109 | count = buf_get_line(buf, bufsize, cur); |
3e441450 | 110 | bufline = &buf[cur]; |
c81b35c0 | 111 | cur += count+1; |
3e441450 | 112 | lineno++; |
e8baccca | 113 | |
3e441450 | 114 | /* eat the whitespace */ |
3db7fa27 | 115 | while ((count > 0) && isspace(bufline[0])) { |
3e441450 | 116 | bufline++; |
117 | count--; | |
118 | } | |
3db7fa27 KS |
119 | if (count == 0) |
120 | continue; | |
3e441450 | 121 | |
e8baccca | 122 | /* see if this is a comment */ |
3e441450 | 123 | if (bufline[0] == COMMENT_CHARACTER) |
e8baccca GKH |
124 | continue; |
125 | ||
16511863 | 126 | if (count >= sizeof(line)) { |
c70560fe | 127 | err("line too long, conf line skipped %s, line %d\n", udev_config_filename, lineno); |
16511863 HH |
128 | continue; |
129 | } | |
130 | ||
13d11705 KS |
131 | memcpy(line, bufline, count); |
132 | line[count] = '\0'; | |
3e441450 | 133 | |
28ce66de KS |
134 | linepos = line; |
135 | retval = get_key(&linepos, &variable, &value); | |
136 | if (retval != 0) { | |
c70560fe | 137 | err("error parsing %s, line %d:%d\n", udev_config_filename, lineno, (int)(linepos-line)); |
28ce66de KS |
138 | continue; |
139 | } | |
aef6bb13 | 140 | |
aef6bb13 | 141 | if (strcasecmp(variable, "udev_root") == 0) { |
63f61c5c | 142 | strlcpy(udev_root, value, sizeof(udev_root)); |
b2c6818d | 143 | remove_trailing_chars(udev_root, '/'); |
aef6bb13 KS |
144 | continue; |
145 | } | |
146 | ||
aef6bb13 | 147 | if (strcasecmp(variable, "udev_rules") == 0) { |
9dd0c257 KS |
148 | strlcpy(udev_rules_dir, value, sizeof(udev_rules_dir)); |
149 | remove_trailing_chars(udev_rules_dir, '/'); | |
aef6bb13 KS |
150 | continue; |
151 | } | |
152 | ||
aef6bb13 | 153 | if (strcasecmp(variable, "udev_log") == 0) { |
6b493a20 | 154 | udev_log_priority = log_priority(value); |
aef6bb13 KS |
155 | continue; |
156 | } | |
e8baccca | 157 | } |
c81b35c0 KS |
158 | |
159 | file_unmap(buf, bufsize); | |
e8baccca GKH |
160 | return retval; |
161 | } | |
162 | ||
1aa1e248 | 163 | void udev_config_init(void) |
e8baccca | 164 | { |
6b493a20 | 165 | const char *env; |
e8baccca | 166 | |
6b493a20 | 167 | strcpy(udev_config_filename, UDEV_CONFIG_FILE); |
282988c4 KS |
168 | strcpy(udev_root, UDEV_ROOT); |
169 | udev_rules_dir[0] = '\0'; | |
6b493a20 | 170 | udev_log_priority = LOG_ERR; |
821d0ec8 | 171 | udev_run = 1; |
e8baccca | 172 | |
821d0ec8 KS |
173 | /* disable RUN key execution */ |
174 | env = getenv("UDEV_RUN"); | |
175 | if (env && !string_is_true(env)) | |
176 | udev_run = 0; | |
177 | ||
6b493a20 KS |
178 | env = getenv("UDEV_CONFIG_FILE"); |
179 | if (env) { | |
180 | strlcpy(udev_config_filename, env, sizeof(udev_config_filename)); | |
b2c6818d | 181 | remove_trailing_chars(udev_config_filename, '/'); |
6b493a20 | 182 | } |
e8baccca | 183 | |
e8baccca | 184 | parse_config_file(); |
6b493a20 | 185 | |
2796c47b MI |
186 | env = getenv("UDEV_ROOT"); |
187 | if (env) { | |
188 | strlcpy(udev_root, env, sizeof(udev_root)); | |
189 | remove_trailing_chars(udev_root, '/'); | |
190 | } | |
191 | ||
6b493a20 KS |
192 | env = getenv("UDEV_LOG"); |
193 | if (env) | |
194 | udev_log_priority = log_priority(env); | |
195 | ||
c70560fe KS |
196 | dbg("UDEV_CONFIG_FILE='%s'\n", udev_config_filename); |
197 | dbg("udev_root='%s'\n", udev_root); | |
282988c4 | 198 | dbg("udev_rules_dir='%s'\n", udev_rules_dir); |
c70560fe | 199 | dbg("udev_log=%d\n", udev_log_priority); |
e8baccca | 200 | } |