Added backing signatures
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fd7b056457
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@ -1,5 +1,7 @@
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#include "backing.h"
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#include "backing.h"
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#include "entry.h"
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#include <stdlib.h>
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#include <stdlib.h>
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#include <string.h>
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#include <string.h>
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#include <errno.h>
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#include <errno.h>
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@ -61,3 +63,4 @@ Result backing_exists(const char* backing_id, bool* out_exists) {
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return SUCCESS;
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return SUCCESS;
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}
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}
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@ -9,19 +9,49 @@
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#define BACKING_POOL_DIR "/var/lib/sandbox/backings"
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#define BACKING_POOL_DIR "/var/lib/sandbox/backings"
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#define MAX_BACKING_LENGTH 256
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#define MAX_BACKING_LENGTH 256
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/// @brief Checks whether the given backing id is valid.
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typedef struct {
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/// @param backing_id The backing id to check.
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DiskInfo disk_info;
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/// @return True if the backing id is valid, false otherwise.
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} BackingInfo;
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/// @brief Checks whether the given backing disk id is valid.
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/// @param backing_id The backing disk id to check.
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/// @return True if the backing disk id is valid, false otherwise.
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bool is_valid_backing_id(const char* backing_id);
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bool is_valid_backing_id(const char* backing_id);
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/// @brief Gets the path of the given backing.
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/// @brief Gets the path of the given backing disk.
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/// @param backing_id The backing id.
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/// @param backing_id The backing disk id.
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/// @param out_path The pointer to the output path string. The caller is responsible for freeing the memory.
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/// @param out_path The pointer to the output path string. The caller is responsible for freeing the memory.
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/// @return The result of the operation.
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/// @return The result of the operation.
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Result get_backing_path(const char* backing_id, char** out_path);
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Result get_backing_path(const char* backing_id, char** out_path);
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/// @brief Checks whether the given backing exists in the pool.
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/// @brief Checks whether the given backing disk exists in the pool.
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/// @param backing_id The backing id.
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/// @param backing_id The backing disk id.
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/// @param out_exists The pointer to the output boolean.
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/// @param out_exists The pointer to the output boolean.
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/// @return The result of the operation.
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/// @return The result of the operation.
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Result backing_exists(const char* backing_id, bool* out_exists);
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Result backing_exists(const char* backing_id, bool* out_exists);
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/// @brief Adds a backing disk to the pool from an entry.
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/// @param backing_id The backing disk id.
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/// @param entry_id The entry id.
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/// @return The result of the operation.
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Result add_backing_from_entry(const char* backing_id, const char* entry_id);
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/// @brief Removes a backing disk from the pool, and removes any backing disks that uses it.
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/// @param backing_id The backing disk id.
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/// @return The result of the operation.
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Result remove_backing(const char* backing_id);
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/// @brief Lists the backing disks in the pool.
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/// @param out_backings The pointer to the null-terminated array of backing disk ids. The caller is responsible for freeing the memory of the array and its elements.
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/// @return The result of the operation.
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Result list_backings(char*** out_backings, size_t* out_count);
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/// @brief Gathers information about a backing disk.
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/// @param backing_id The backing disk id.
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/// @param out_info The information about the backing disk.
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/// @return The result of the operation.
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Result get_backing_info(const char* backing_id, BackingInfo* out_info);
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/// @brief Frees the resources used by the given backing disk information.
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/// @param info The backing disk information to free.
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void free_backing_info(BackingInfo* info);
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@ -85,7 +85,7 @@ Result add_automatic_entry(const char* entry_id);
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Result remove_entry(const char* entry_id);
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Result remove_entry(const char* entry_id);
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/// @brief Lists the entries in the pool.
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/// @brief Lists the entries in the pool.
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/// @param out_entries The pointer to the output entries string. The caller is responsible for freeing the memory of the strings and the array.
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/// @param out_entries The pointer to the null-terminated array of entry ids. The caller is responsible for freeing the memory of the array and its elements.
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/// @return The result of the operation.
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/// @return The result of the operation.
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Result list_entries(char*** out_entries);
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Result list_entries(char*** out_entries);
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54
src/utils.c
54
src/utils.c
@ -343,6 +343,60 @@ Result write_file(const char* path, const char* string) {
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return result;
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return result;
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}
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}
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Result copy_file(const char* src_path, const char* dst_path, mode_t mode) {
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// Open the source file
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int src_fd = open(src_path, O_RDONLY);
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if (src_fd == -1) {
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log_message(LOG_LEVEL_ERROR, "Failed to open the source file '%s' (%s).", src_path, strerror(errno));
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return FAILURE;
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}
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// Open the destination file
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int dst_fd = open(dst_path, O_WRONLY | O_CREAT | O_TRUNC, mode);
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if (dst_fd == -1) {
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log_message(LOG_LEVEL_ERROR, "Failed to open the destination file '%s' (%s).", dst_path, strerror(errno));
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close(src_fd);
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return FAILURE;
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}
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// Copy the file
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char buffer[4096];
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ssize_t bytes_read;
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while ((bytes_read = read(src_fd, buffer, sizeof(buffer))) > 0) {
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ssize_t bytes_written = 0;
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while (bytes_written < bytes_read) {
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ssize_t result = write(dst_fd, buffer + bytes_written, bytes_read - bytes_written);
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if (result == -1) {
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log_message(LOG_LEVEL_ERROR, "Failed to write to the destination file '%s' (%s).", dst_path, strerror(errno));
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close(src_fd);
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close(dst_fd);
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return FAILURE;
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}
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bytes_written += result;
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}
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}
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// Check if an error occurred
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if (bytes_read == -1) {
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log_message(LOG_LEVEL_ERROR, "Failed to read from the source file '%s' (%s).", src_path, strerror(errno));
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close(src_fd);
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close(dst_fd);
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return FAILURE;
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}
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// Close the files
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close(src_fd);
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close(dst_fd);
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return SUCCESS;
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}
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Result format_size(uint64_t size, char** out_string) {
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Result format_size(uint64_t size, char** out_string) {
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*out_string = NULL;
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*out_string = NULL;
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@ -2,6 +2,7 @@
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#include <stdbool.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdint.h>
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#include <sys/types.h>
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#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
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#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
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@ -69,6 +70,13 @@ Result write_fd(int fd, const char* string);
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/// @return The result of the operation.
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/// @return The result of the operation.
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Result write_file(const char* path, const char* string);
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Result write_file(const char* path, const char* string);
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/// @brief Copies a file.
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/// @param src_path The path of the source file.
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/// @param dst_path The path of the destination file.
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/// @param mode The mode of the destination file.
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/// @return The result of the operation.
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Result copy_file(const char* src_path, const char* dst_path, mode_t mode);
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/// @brief Converts a size in bytes to a human-readable string.
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/// @brief Converts a size in bytes to a human-readable string.
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/// @param size The size in bytes.
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/// @param size The size in bytes.
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/// @param out_string The pointer to the output string. The caller is responsible for freeing the memory.
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/// @param out_string The pointer to the output string. The caller is responsible for freeing the memory.
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