92 lines
2.1 KiB
C
92 lines
2.1 KiB
C
/* libs/diskconfig/write_lst.c
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*
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* Copyright 2008, The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "write_lst"
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#include <sys/types.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <cutils/log.h>
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#include <diskconfig/diskconfig.h>
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struct write_list *
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alloc_wl(uint32_t data_len)
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{
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struct write_list *item;
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if (!(item = malloc(sizeof(struct write_list) + data_len))) {
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ALOGE("Unable to allocate memory.");
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return NULL;
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}
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item->len = data_len;
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return item;
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}
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void
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free_wl(struct write_list *item)
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{
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if (item)
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free(item);
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}
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struct write_list *
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wlist_add(struct write_list **lst, struct write_list *item)
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{
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item->next = (*lst);
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*lst = item;
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return item;
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}
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void
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wlist_free(struct write_list *lst)
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{
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struct write_list *temp_wr;
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while (lst) {
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temp_wr = lst->next;
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free_wl(lst);
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lst = temp_wr;
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}
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}
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int
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wlist_commit(int fd, struct write_list *lst, int test)
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{
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for(; lst; lst = lst->next) {
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if (lseek64(fd, lst->offset, SEEK_SET) != (loff_t)lst->offset) {
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ALOGE("Cannot seek to the specified position (%lld).", (long long)lst->offset);
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goto fail;
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}
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if (!test) {
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if (write(fd, lst->data, lst->len) != (int)lst->len) {
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ALOGE("Failed writing %u bytes at position %lld.", lst->len,
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(long long)lst->offset);
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goto fail;
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}
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} else
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ALOGI("Would write %d bytes @ offset %lld.", lst->len, (long long)lst->offset);
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}
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return 0;
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fail:
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return -1;
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}
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