diff options
Diffstat (limited to 'libdiskconfig/diskutils.c')
-rw-r--r-- | libdiskconfig/diskutils.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/libdiskconfig/diskutils.c b/libdiskconfig/diskutils.c new file mode 100644 index 000000000..22767c00e --- /dev/null +++ b/libdiskconfig/diskutils.c | |||
@@ -0,0 +1,117 @@ | |||
1 | /* libs/diskconfig/diskutils.c | ||
2 | * | ||
3 | * Copyright 2008, The Android Open Source Project | ||
4 | * | ||
5 | * Licensed under the Apache License, Version 2.0 (the "License"); | ||
6 | * you may not use this file except in compliance with the License. | ||
7 | * You may obtain a copy of the License at | ||
8 | * | ||
9 | * http://www.apache.org/licenses/LICENSE-2.0 | ||
10 | * | ||
11 | * Unless required by applicable law or agreed to in writing, software | ||
12 | * distributed under the License is distributed on an "AS IS" BASIS, | ||
13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
14 | * See the License for the specific language governing permissions and | ||
15 | * limitations under the License. | ||
16 | */ | ||
17 | |||
18 | #define LOG_TAG "diskutils" | ||
19 | |||
20 | #include <errno.h> | ||
21 | #include <fcntl.h> | ||
22 | #include <stdio.h> | ||
23 | #include <stdlib.h> | ||
24 | #include <string.h> | ||
25 | #include <unistd.h> | ||
26 | #include <sys/stat.h> | ||
27 | |||
28 | #include <cutils/log.h> | ||
29 | |||
30 | #include <diskconfig/diskconfig.h> | ||
31 | |||
32 | int | ||
33 | write_raw_image(const char *dst, const char *src, loff_t offset, int test) | ||
34 | { | ||
35 | int dst_fd = -1; | ||
36 | int src_fd = -1; | ||
37 | uint8_t buffer[2048]; | ||
38 | int nr_bytes; | ||
39 | int tmp; | ||
40 | int done = 0; | ||
41 | uint64_t total = 0; | ||
42 | |||
43 | LOGI("Writing RAW image '%s' to '%s' (offset=%llu)", src, dst, offset); | ||
44 | if ((src_fd = open(src, O_RDONLY)) < 0) { | ||
45 | LOGE("Could not open %s for reading (errno=%d).", src, errno); | ||
46 | goto fail; | ||
47 | } | ||
48 | |||
49 | if (!test) { | ||
50 | if ((dst_fd = open(dst, O_RDWR)) < 0) { | ||
51 | LOGE("Could not open '%s' for read/write (errno=%d).", dst, errno); | ||
52 | goto fail; | ||
53 | } | ||
54 | |||
55 | if (lseek64(dst_fd, offset, SEEK_SET) != offset) { | ||
56 | LOGE("Could not seek to offset %lld in %s.", offset, dst); | ||
57 | goto fail; | ||
58 | } | ||
59 | } | ||
60 | |||
61 | while (!done) { | ||
62 | if ((nr_bytes = read(src_fd, buffer, sizeof(buffer))) < 0) { | ||
63 | /* XXX: Should we not even bother with EINTR? */ | ||
64 | if (errno == EINTR) | ||
65 | continue; | ||
66 | LOGE("Error (%d) while reading from '%s'", errno, src); | ||
67 | goto fail; | ||
68 | } | ||
69 | |||
70 | if (!nr_bytes) { | ||
71 | /* we're done. */ | ||
72 | done = 1; | ||
73 | break; | ||
74 | } | ||
75 | |||
76 | total += nr_bytes; | ||
77 | |||
78 | /* skip the write loop if we're testing */ | ||
79 | if (test) | ||
80 | nr_bytes = 0; | ||
81 | |||
82 | while (nr_bytes > 0) { | ||
83 | if ((tmp = write(dst_fd, buffer, nr_bytes)) < 0) { | ||
84 | /* XXX: Should we not even bother with EINTR? */ | ||
85 | if (errno == EINTR) | ||
86 | continue; | ||
87 | LOGE("Error (%d) while writing to '%s'", errno, dst); | ||
88 | goto fail; | ||
89 | } | ||
90 | if (!tmp) | ||
91 | continue; | ||
92 | nr_bytes -= tmp; | ||
93 | } | ||
94 | } | ||
95 | |||
96 | if (!done) { | ||
97 | LOGE("Exited read/write loop without setting flag! WTF?!"); | ||
98 | goto fail; | ||
99 | } | ||
100 | |||
101 | if (dst_fd >= 0) | ||
102 | fsync(dst_fd); | ||
103 | |||
104 | LOGI("Wrote %llu bytes to %s @ %lld", total, dst, offset); | ||
105 | |||
106 | close(src_fd); | ||
107 | if (dst_fd >= 0) | ||
108 | close(dst_fd); | ||
109 | return 0; | ||
110 | |||
111 | fail: | ||
112 | if (dst_fd >= 0) | ||
113 | close(dst_fd); | ||
114 | if (src_fd >= 0) | ||
115 | close(src_fd); | ||
116 | return 1; | ||
117 | } | ||