summaryrefslogtreecommitdiff
path: root/lib/sqfs/io_file.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/sqfs/io_file.c')
-rw-r--r--lib/sqfs/io_file.c163
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;
-}