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authorSan Mehat2010-03-10 14:46:00 -0600
committerSan Mehat2010-03-10 17:19:06 -0600
commita6391f1006b961ca89d1c79a826375380684a4de (patch)
tree50f5a2b2179d52cf24cb6ad09c4842d0404610e2 /libdiskconfig/write_lst.c
parent732799eca9f2767996bc423503937c4c935bb630 (diff)
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system: libdiskconfig: Add libdiskconfig
Change-Id: Ie7a7b5d8016dec60cdfb17228c3f519789c98564 Signed-off-by: San Mehat <san@google.com>
Diffstat (limited to 'libdiskconfig/write_lst.c')
-rw-r--r--libdiskconfig/write_lst.c92
1 files changed, 92 insertions, 0 deletions
diff --git a/libdiskconfig/write_lst.c b/libdiskconfig/write_lst.c
new file mode 100644
index 000000000..12b7cd775
--- /dev/null
+++ b/libdiskconfig/write_lst.c
@@ -0,0 +1,92 @@
1/* libs/diskconfig/write_lst.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 "write_lst"
19#include <sys/types.h>
20#include <stdint.h>
21#include <stdio.h>
22#include <stdlib.h>
23#include <unistd.h>
24
25#include <cutils/log.h>
26
27#include <diskconfig/diskconfig.h>
28
29struct write_list *
30alloc_wl(uint32_t data_len)
31{
32 struct write_list *item;
33
34 if (!(item = malloc(sizeof(struct write_list) + data_len))) {
35 LOGE("Unable to allocate memory.");
36 return NULL;
37 }
38
39 item->len = data_len;
40 return item;
41}
42
43void
44free_wl(struct write_list *item)
45{
46 if (item)
47 free(item);
48}
49
50struct write_list *
51wlist_add(struct write_list **lst, struct write_list *item)
52{
53 item->next = (*lst);
54 *lst = item;
55 return item;
56}
57
58void
59wlist_free(struct write_list *lst)
60{
61 struct write_list *temp_wr;
62 while (lst) {
63 temp_wr = lst->next;
64 free_wl(lst);
65 lst = temp_wr;
66 }
67}
68
69int
70wlist_commit(int fd, struct write_list *lst, int test)
71{
72 for(; lst; lst = lst->next) {
73 if (lseek64(fd, lst->offset, SEEK_SET) != (loff_t)lst->offset) {
74 LOGE("Cannot seek to the specified position (%lld).", lst->offset);
75 goto fail;
76 }
77
78 if (!test) {
79 if (write(fd, lst->data, lst->len) != (int)lst->len) {
80 LOGE("Failed writing %u bytes at position %lld.", lst->len,
81 lst->offset);
82 goto fail;
83 }
84 } else
85 LOGI("Would write %d bytes @ offset %lld.", lst->len, lst->offset);
86 }
87
88 return 0;
89
90fail:
91 return -1;
92}