diff options
Diffstat (limited to 'core')
| -rw-r--r-- | core/rdar.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/core/rdar.c b/core/rdar.c index a5f3b48..2cd1e66 100644 --- a/core/rdar.c +++ b/core/rdar.c @@ -4,13 +4,27 @@ */ #define _DEFAULT_SOURCE +#include <sys/queue.h> #include <unistd.h> #include <stdio.h> #include <stdint.h> #include <stddef.h> +#include <stdlib.h> #include <dirent.h> #include <string.h> +/* Forward declarations */ +struct idata_desc; + +/* Data descriptor constants */ +#define RDAR_MAX_PATHLEN 32 +#define RDAR_MAGIC ">RDAR!" +#define RDAR_MAGIC_LEN 6 + +/* Data descriptor file flags */ +#define DATA_ROOT (1 << 0) /* Is root data descriptor */ +#define DATA_AVL (1 << 1) /* Available to consumer software; not touched by us */ + /* Version conversion macros */ #define VERSION_U16(MAJOR, MINOR) \ (((MINOR) << 8) | (MAJOR)) @@ -19,6 +33,10 @@ #define VERSION_MINOR(VERSION) \ (((VERSION) >> 8) & 0xFF) +/* Pushes idata descriptor to table */ +#define IDATA_PUSH(IDATA_P) \ + TAILQ_INSERT_TAIL(&d_desc_table, (IDATA_P), link); + /* * Software version * @@ -33,6 +51,36 @@ /* Globals */ static const char *input_dir = NULL; static const char *output_path = NULL; +static TAILQ_HEAD(, idata_desc) d_desc_table; + +/* + * A data descriptor holds information about a specific + * file along with an offset to which it is located at + * in the offset. + * + * @magic: Format magic + * @path: File path + * @off: File data offset + * @flags: File flags + */ +struct data_desc { + char magic[RDAR_MAGIC_LEN]; + char path[RDAR_MAX_PATHLEN]; + off_t off; + uint16_t flags; +}; + +/* + * Internal data descriptor, used to hold data + * before being flushed to the archive + * + * @data: Actual data descriptor + * @link: TAILQ link + */ +struct idata_desc { + struct data_desc data; + TAILQ_ENTRY(idata_desc) link; +}; static void help(void) @@ -54,11 +102,84 @@ version(void) printf("Version v%d.%d\n", Major, Minor); } +/* + * Allocate an internal data descriptor + * + * @path: Path of file + */ +static struct idata_desc * +idata_from_file(const char *path) +{ + struct idata_desc *idata_desc; + struct data_desc *data_desc; + size_t path_len; + + path_len = strlen(path); + if (path_len >= RDAR_MAX_PATHLEN - 1) { + printf("fatal: path '%s' is too long!\n", path); + return NULL; + } + + idata_desc = malloc(sizeof(*idata_desc)); + if (idata_desc == NULL) { + printf("fatal: failed to allocate idata_desc\n"); + printf("* last file processed: %s\n", path); + return NULL; + } + + /* Initialize the data descriptor */ + data_desc = &idata_desc->data; + memcpy(data_desc->magic, RDAR_MAGIC, RDAR_MAGIC_LEN); + memcpy(data_desc->path, path, path_len); + data_desc->path[path_len] = '\0'; + data_desc->flags = 0; + data_desc->off = 0; + return idata_desc; +} + +/* + * Push the root descriptor to the table. + * + * The root descriptor is to contain an offset into a special + * %root% file entry which contains data (e.g., version, file count) + * encoded within. + */ +static int +idata_push_root(void) +{ + struct idata_desc *root; + + root = idata_from_file("%root%"); + if (root == NULL) { + return -1; + } + + IDATA_PUSH(root); + return 0; +} + +static void +idata_table_destroy(void) +{ + struct idata_desc *desc, *next; + + printf("* dumping idata_table\n"); + desc = TAILQ_FIRST(&d_desc_table); + while (desc != NULL) { + printf("-- %s\n", desc->data.path); + + next = TAILQ_NEXT(desc, link); + TAILQ_REMOVE(&d_desc_table, desc, link); + desc = next; + } +} + static void recurse_dir(const char *dirpath) { DIR *dir; struct dirent *dirent; + struct idata_desc *idata_desc; char pathbuf[264]; dir = opendir(dirpath); @@ -77,6 +198,14 @@ recurse_dir(const char *dirpath) case DT_REG: snprintf(pathbuf, sizeof(pathbuf), "%s/%s", dirpath, dirent->d_name); printf("[f] %s\n", pathbuf); + + idata_desc = idata_from_file(pathbuf); + if (idata_desc == NULL) { + printf("warn: ignoring '%s'\n", pathbuf); + break; + } + + IDATA_PUSH(idata_desc); break; case DT_DIR: snprintf(pathbuf, sizeof(pathbuf), "%s/%s", dirpath, dirent->d_name); @@ -137,6 +266,9 @@ main(int argc, char **argv) output_path = FALLBACK_OUTPUT_PATH; } + TAILQ_INIT(&d_desc_table); + idata_push_root(); recurse_dir(input_dir); + idata_table_destroy(); return 0; } |