diff options
Diffstat (limited to 'lib/sqfs/io_file.c')
-rw-r--r-- | lib/sqfs/io_file.c | 163 |
1 files changed, 0 insertions, 163 deletions
diff --git a/lib/sqfs/io_file.c b/lib/sqfs/io_file.c deleted file mode 100644 index f93af4d..0000000 --- a/lib/sqfs/io_file.c +++ /dev/null @@ -1,163 +0,0 @@ -/* SPDX-License-Identifier: LGPL-3.0-or-later */ -/* - * io_file.c - * - * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at> - */ -#define SQFS_BUILDING_DLL -#include "config.h" - -#include "sqfs/io.h" -#include "sqfs/error.h" - -#include <sys/stat.h> -#include <stdlib.h> -#include <unistd.h> -#include <errno.h> -#include <fcntl.h> - - -typedef struct { - sqfs_file_t base; - - sqfs_u64 size; - int fd; -} sqfs_file_stdio_t; - - -static void stdio_destroy(sqfs_file_t *base) -{ - sqfs_file_stdio_t *file = (sqfs_file_stdio_t *)base; - - close(file->fd); - free(file); -} - -static int stdio_read_at(sqfs_file_t *base, sqfs_u64 offset, - void *buffer, size_t size) -{ - sqfs_file_stdio_t *file = (sqfs_file_stdio_t *)base; - ssize_t ret; - - while (size > 0) { - ret = pread(file->fd, buffer, size, offset); - - if (ret < 0) { - if (errno == EINTR) - continue; - return SQFS_ERROR_IO; - } - - if (ret == 0) - return SQFS_ERROR_OUT_OF_BOUNDS; - - buffer = (char *)buffer + ret; - size -= ret; - offset += ret; - } - - return 0; -} - -static int stdio_write_at(sqfs_file_t *base, sqfs_u64 offset, - const void *buffer, size_t size) -{ - sqfs_file_stdio_t *file = (sqfs_file_stdio_t *)base; - ssize_t ret; - - while (size > 0) { - ret = pwrite(file->fd, buffer, size, offset); - - if (ret < 0) { - if (errno == EINTR) - continue; - return SQFS_ERROR_IO; - } - - if (ret == 0) - return SQFS_ERROR_OUT_OF_BOUNDS; - - buffer = (const char *)buffer + ret; - size -= ret; - offset += ret; - } - - if (offset >= file->size) - file->size = offset; - - return 0; -} - -static sqfs_u64 stdio_get_size(const sqfs_file_t *base) -{ - const sqfs_file_stdio_t *file = (const sqfs_file_stdio_t *)base; - - return file->size; -} - -static int stdio_truncate(sqfs_file_t *base, sqfs_u64 size) -{ - sqfs_file_stdio_t *file = (sqfs_file_stdio_t *)base; - - if (ftruncate(file->fd, size)) - return SQFS_ERROR_IO; - - file->size = size; - return 0; -} - - -sqfs_file_t *sqfs_open_file(const char *filename, sqfs_u32 flags) -{ - sqfs_file_stdio_t *file; - int open_mode, temp; - sqfs_file_t *base; - struct stat sb; - - if (flags & ~SQFS_FILE_OPEN_ALL_FLAGS) { - errno = EINVAL; - return NULL; - } - - file = calloc(1, sizeof(*file)); - base = (sqfs_file_t *)file; - if (file == NULL) - return NULL; - - if (flags & SQFS_FILE_OPEN_READ_ONLY) { - open_mode = O_RDONLY; - } else { - open_mode = O_CREAT | O_RDWR; - - if (flags & SQFS_FILE_OPEN_OVERWRITE) { - open_mode |= O_TRUNC; - } else { - open_mode |= O_EXCL; - } - } - - file->fd = open(filename, open_mode, 0600); - if (file->fd < 0) { - temp = errno; - free(file); - errno = temp; - return NULL; - } - - if (fstat(file->fd, &sb)) { - temp = errno; - close(file->fd); - free(file); - errno = temp; - return NULL; - } - - file->size = sb.st_size; - - base->destroy = stdio_destroy; - base->read_at = stdio_read_at; - base->write_at = stdio_write_at; - base->get_size = stdio_get_size; - base->truncate = stdio_truncate; - return base; -} |