diff options
Diffstat (limited to 'libdiskconfig/write_lst.c')
-rw-r--r-- | libdiskconfig/write_lst.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/libdiskconfig/write_lst.c b/libdiskconfig/write_lst.c new file mode 100644 index 0000000..bd645b4 --- /dev/null +++ b/libdiskconfig/write_lst.c @@ -0,0 +1,92 @@ +/* libs/diskconfig/write_lst.c + * + * Copyright 2008, The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#define LOG_TAG "write_lst" +#include <sys/types.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> + +#include <cutils/log.h> + +#include "diskconfig.h" + +struct write_list * +alloc_wl(uint32_t data_len) +{ + struct write_list *item; + + if (!(item = malloc(sizeof(struct write_list) + data_len))) { + LOGE("Unable to allocate memory."); + return NULL; + } + + item->len = data_len; + return item; +} + +void +free_wl(struct write_list *item) +{ + if (item) + free(item); +} + +struct write_list * +wlist_add(struct write_list **lst, struct write_list *item) +{ + item->next = (*lst); + *lst = item; + return item; +} + +void +wlist_free(struct write_list *lst) +{ + struct write_list *temp_wr; + while (lst) { + temp_wr = lst->next; + free_wl(lst); + lst = temp_wr; + } +} + +int +wlist_commit(int fd, struct write_list *lst, int test) +{ + for(; lst; lst = lst->next) { + if (lseek64(fd, lst->offset, SEEK_SET) != (loff_t)lst->offset) { + LOGE("Cannot seek to the specified position (%lld).", lst->offset); + goto fail; + } + + if (!test) { + if (write(fd, lst->data, lst->len) != (int)lst->len) { + LOGE("Failed writing %u bytes at position %lld.", lst->len, + lst->offset); + goto fail; + } + } else + LOGI("Would write %d bytes @ offset %lld.", lst->len, lst->offset); + } + + return 0; + +fail: + return -1; +} |