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Diffstat (limited to 'lib/sqfs/src/unix/io_file.c')
-rw-r--r--lib/sqfs/src/unix/io_file.c76
1 files changed, 41 insertions, 35 deletions
diff --git a/lib/sqfs/src/unix/io_file.c b/lib/sqfs/src/unix/io_file.c
index 886f752..f9b602a 100644
--- a/lib/sqfs/src/unix/io_file.c
+++ b/lib/sqfs/src/unix/io_file.c
@@ -24,7 +24,7 @@ typedef struct {
bool readonly;
sqfs_u64 size;
- int fd;
+ sqfs_file_handle_t fd;
char name[];
} sqfs_file_stdio_t;
@@ -146,18 +146,40 @@ static const char *stdio_get_filename(sqfs_file_t *file)
return ((sqfs_file_stdio_t *)file)->name;
}
+int sqfs_open_native_file(sqfs_file_handle_t *out, const char *filename,
+ sqfs_u32 flags)
+{
+ int open_mode;
+
+ *out = -1;
+
+ if (flags & ~SQFS_FILE_OPEN_ALL_FLAGS)
+ return SQFS_ERROR_UNSUPPORTED;
+
+ 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;
+ }
+ }
+
+ *out = open(filename, open_mode, 0644);
+
+ return (*out < 0) ? SQFS_ERROR_IO : 0;
+}
+
sqfs_file_t *sqfs_open_file(const char *filename, sqfs_u32 flags)
{
sqfs_file_stdio_t *file;
size_t size, namelen;
- int open_mode, temp;
sqfs_file_t *base;
struct stat sb;
-
- if (flags & ~SQFS_FILE_OPEN_ALL_FLAGS) {
- errno = EINVAL;
- return NULL;
- }
+ int temp;
namelen = strlen(filename);
size = sizeof(*file) + 1;
@@ -175,37 +197,14 @@ sqfs_file_t *sqfs_open_file(const char *filename, sqfs_u32 flags)
sqfs_object_init(file, stdio_destroy, stdio_copy);
memcpy(file->name, filename, namelen);
- if (flags & SQFS_FILE_OPEN_READ_ONLY) {
- file->readonly = true;
- open_mode = O_RDONLY;
- } else {
- file->readonly = false;
- 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, 0644);
- if (file->fd < 0) {
- temp = errno;
- free(file);
- errno = temp;
- return NULL;
- }
+ if (sqfs_open_native_file(&file->fd, filename, flags))
+ goto fail;
- if (fstat(file->fd, &sb)) {
- temp = errno;
- close(file->fd);
- free(file);
- errno = temp;
- return NULL;
- }
+ if (fstat(file->fd, &sb))
+ goto fail;
file->size = sb.st_size;
+ file->readonly = (flags & SQFS_FILE_OPEN_READ_ONLY) != 0;
base->read_at = stdio_read_at;
base->write_at = stdio_write_at;
@@ -213,4 +212,11 @@ sqfs_file_t *sqfs_open_file(const char *filename, sqfs_u32 flags)
base->truncate = stdio_truncate;
base->get_filename = stdio_get_filename;
return base;
+fail:
+ temp = errno;
+ if (file->fd >= 0)
+ close(file->fd);
+ free(file);
+ errno = temp;
+ return NULL;
}