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author | Marcin Bukat <marcin.bukat@gmail.com> | 2017-04-27 11:36:40 +0200 |
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committer | Marcin Bukat <marcin.bukat@gmail.com> | 2018-06-12 10:31:14 +0200 |
commit | d55680993df9b6743506814d98b5cc1859828f8a (patch) | |
tree | 054dc45425fa1a6863f154b484036f26cc3ac13f /firmware/target/hosted/agptek/sysfs.c | |
parent | beef52c5f0832e2c36bb1523b51eb8721f851db5 (diff) | |
download | rockbox-d55680993df9b6743506814d98b5cc1859828f8a.tar.gz rockbox-d55680993df9b6743506814d98b5cc1859828f8a.zip |
Agptek Rocker: Initial commit
Change-Id: I26b51106c7b1c36a603fba6d521e917d79b5a95b
Diffstat (limited to 'firmware/target/hosted/agptek/sysfs.c')
-rw-r--r-- | firmware/target/hosted/agptek/sysfs.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/firmware/target/hosted/agptek/sysfs.c b/firmware/target/hosted/agptek/sysfs.c new file mode 100644 index 0000000000..ad4635ac57 --- /dev/null +++ b/firmware/target/hosted/agptek/sysfs.c | |||
@@ -0,0 +1,186 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___ | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * | ||
9 | * Copyright (C) 2014 by Ilia Sergachev: Initial Rockbox port to iBasso DX50 | ||
10 | * Copyright (C) 2014 by Mario Basister: iBasso DX90 port | ||
11 | * Copyright (C) 2014 by Simon Rothen: Initial Rockbox repository submission, additional features | ||
12 | * Copyright (C) 2014 by Udo Schläpfer: Code clean up, additional features | ||
13 | * | ||
14 | * This program is free software; you can redistribute it and/or | ||
15 | * modify it under the terms of the GNU General Public License | ||
16 | * as published by the Free Software Foundation; either version 2 | ||
17 | * of the License, or (at your option) any later version. | ||
18 | * | ||
19 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
20 | * KIND, either express or implied. | ||
21 | * | ||
22 | ****************************************************************************/ | ||
23 | |||
24 | |||
25 | #include <stdio.h> | ||
26 | #include <string.h> | ||
27 | |||
28 | #include "config.h" | ||
29 | #include "debug.h" | ||
30 | #include "sysfs.h" | ||
31 | |||
32 | |||
33 | static FILE* open_read(const char *file_name) | ||
34 | { | ||
35 | FILE *f = fopen(file_name, "r"); | ||
36 | if(f == NULL) | ||
37 | { | ||
38 | DEBUGF("ERROR %s: Can not open %s for reading.", __func__, file_name); | ||
39 | } | ||
40 | |||
41 | return f; | ||
42 | } | ||
43 | |||
44 | |||
45 | static FILE* open_write(const char* file_name) | ||
46 | { | ||
47 | FILE *f = fopen(file_name, "w"); | ||
48 | if(f == NULL) | ||
49 | { | ||
50 | DEBUGF("ERROR %s: Can not open %s for writing.", __func__, file_name); | ||
51 | } | ||
52 | |||
53 | return f; | ||
54 | } | ||
55 | |||
56 | |||
57 | bool sysfs_get_int(const char *path, int *value) | ||
58 | { | ||
59 | *value = -1; | ||
60 | |||
61 | FILE *f = open_read(path); | ||
62 | if(f == NULL) | ||
63 | { | ||
64 | return false; | ||
65 | } | ||
66 | |||
67 | bool success = true; | ||
68 | if(fscanf(f, "%d", value) == EOF) | ||
69 | { | ||
70 | DEBUGF("ERROR %s: Read failed for %s.", __func__, path); | ||
71 | success = false; | ||
72 | } | ||
73 | |||
74 | fclose(f); | ||
75 | return success; | ||
76 | } | ||
77 | |||
78 | |||
79 | bool sysfs_set_int(const char *path, int value) | ||
80 | { | ||
81 | FILE *f = open_write(path); | ||
82 | if(f == NULL) | ||
83 | { | ||
84 | return false; | ||
85 | } | ||
86 | |||
87 | bool success = true; | ||
88 | if(fprintf(f, "%d", value) < 1) | ||
89 | { | ||
90 | DEBUGF("ERROR %s: Write failed for %s.", __func__, path); | ||
91 | success = false; | ||
92 | } | ||
93 | |||
94 | fclose(f); | ||
95 | return success; | ||
96 | } | ||
97 | |||
98 | |||
99 | bool sysfs_get_char(const char *path, char *value) | ||
100 | { | ||
101 | *value = '\0'; | ||
102 | FILE *f = open_read(path); | ||
103 | if(f == NULL) | ||
104 | { | ||
105 | return false; | ||
106 | } | ||
107 | |||
108 | bool success = true; | ||
109 | if(fscanf(f, "%c", value) == EOF) | ||
110 | { | ||
111 | DEBUGF("ERROR %s: Read failed for %s.", __func__, path); | ||
112 | success = false; | ||
113 | } | ||
114 | |||
115 | fclose(f); | ||
116 | return success; | ||
117 | } | ||
118 | |||
119 | |||
120 | bool sysfs_set_char(const char *path, char value) | ||
121 | { | ||
122 | FILE *f = open_write(path); | ||
123 | if(f == NULL) | ||
124 | { | ||
125 | return false; | ||
126 | } | ||
127 | |||
128 | bool success = true; | ||
129 | if(fprintf(f, "%c", value) < 1) | ||
130 | { | ||
131 | DEBUGF("ERROR %s: Write failed for %s.", __func__, path); | ||
132 | success = false; | ||
133 | } | ||
134 | |||
135 | fclose(f); | ||
136 | return success; | ||
137 | } | ||
138 | |||
139 | |||
140 | bool sysfs_get_string(const char *path, char *value, int size) | ||
141 | { | ||
142 | value[0] = '\0'; | ||
143 | FILE *f = open_read(path); | ||
144 | if(f == NULL) | ||
145 | { | ||
146 | return false; | ||
147 | } | ||
148 | |||
149 | bool success = true; | ||
150 | if(fgets(value, size, f) == NULL) | ||
151 | { | ||
152 | DEBUGF("ERROR %s: Read failed for %s.", __func__, path); | ||
153 | success = false; | ||
154 | } | ||
155 | else | ||
156 | { | ||
157 | size_t length = strlen(value); | ||
158 | if((length > 0) && value[length - 1] == '\n') | ||
159 | { | ||
160 | value[length - 1] = '\0'; | ||
161 | } | ||
162 | } | ||
163 | |||
164 | fclose(f); | ||
165 | return success; | ||
166 | } | ||
167 | |||
168 | |||
169 | bool sysfs_set_string(const char *path, char *value) | ||
170 | { | ||
171 | FILE *f = open_write(path); | ||
172 | if(f == NULL) | ||
173 | { | ||
174 | return false; | ||
175 | } | ||
176 | |||
177 | bool success = true; | ||
178 | if(fprintf(f, "%s", value) < 1) | ||
179 | { | ||
180 | DEBUGF("ERROR %s: Write failed for %s.", __func__, path); | ||
181 | success = false; | ||
182 | } | ||
183 | |||
184 | fclose(f); | ||
185 | return success; | ||
186 | } | ||