1 /*
2 * Copyright (c) 2013, Google Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google, Inc. nor the names of its contributors
15 * may be used to endorse or promote products derived from this
16 * software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
22 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
25 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
28 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <fcntl.h>
33 #include <string.h>
34 #include <unistd.h>
35 #include <sys/types.h>
36
37 #include "protocol.h"
38 #include "utils.h"
39
40 #include "debug.h"
41
42 // TODO: change config path
43 #define CONFIG_PATH "/data/fastboot.cfg"
44
config_parse_line(char * line)45 static int config_parse_line(char *line)
46 {
47 char *c;
48 char *key;
49 char *value;
50
51 c = strchr(line, '#');
52 if (c)
53 *c = '\0';
54
55 if (strspn(line, " \t") == strlen(line))
56 return 0;
57
58 c = strchr(line, '=');
59 if (c == NULL)
60 return -1;
61
62 key = line;
63 *c = '\0';
64 value = c + 1;
65
66 key = strip(key);
67 value = strip(value);
68
69 key = strdup(key);
70 value = strdup(value);
71
72 fastboot_publish(key, value);
73
74 return 0;
75 }
76
config_parse(char * buffer)77 static void config_parse(char *buffer)
78 {
79 char *saveptr;
80 char *str = buffer;
81 char *line = buffer;
82 int c;
83 int ret;
84
85 for (c = 1; line != NULL; c++) {
86 line = strtok_r(str, "\r\n", &saveptr);
87 if (line != NULL) {
88 D(VERBOSE, "'%s'", line);
89 ret = config_parse_line(line);
90 if (ret < 0) {
91 D(WARN, "error parsing " CONFIG_PATH " line %d", c);
92 }
93 }
94 str = NULL;
95 }
96 }
97
config_init()98 void config_init()
99 {
100 int fd;
101 off_t len;
102 ssize_t ret;
103 size_t count = 0;
104 char *buffer;
105
106 fd = open(CONFIG_PATH, O_RDONLY);
107 if (fd < 0) {
108 D(ERR, "failed to open " CONFIG_PATH);
109 return;
110 }
111
112 len = lseek(fd, 0, SEEK_END);
113 if (len < 0) {
114 D(ERR, "failed to seek to end of " CONFIG_PATH);
115 return;
116 }
117
118 lseek(fd, 0, SEEK_SET);
119
120 buffer = malloc(len + 1);
121 if (buffer == NULL) {
122 D(ERR, "failed to allocate %ld bytes", len);
123 return;
124 }
125
126 while (count < (size_t)len) {
127 ret = read(fd, buffer + count, len - count);
128 if (ret < 0 && errno != EINTR) {
129 D(ERR, "failed to read " CONFIG_PATH ": %d %s", errno, strerror(errno));
130 return;
131 }
132 if (ret == 0) {
133 D(ERR, "early EOF reading " CONFIG_PATH);
134 return;
135 }
136
137 count += ret;
138 }
139
140 buffer[len] = '\0';
141
142 config_parse(buffer);
143
144 free(buffer);
145 }
146