24 	int fd, ret;  in sandbox_fs_read_at()  local
29 	ret = os_lseek(fd, pos, OS_SEEK_SET);  in sandbox_fs_read_at()
30 	if (ret == -1) {  in sandbox_fs_read_at()
32 		return ret;  in sandbox_fs_read_at()
35 		ret = os_get_filesize(filename, &size);  in sandbox_fs_read_at()
36 		if (ret) {  in sandbox_fs_read_at()
38 			return ret;  in sandbox_fs_read_at()
48 		ret = -1;  in sandbox_fs_read_at()
50 		ret = 0;  in sandbox_fs_read_at()
54 	return ret;  in sandbox_fs_read_at()
61 	int fd, ret;  in sandbox_fs_write_at()  local
66 	ret = os_lseek(fd, pos, OS_SEEK_SET);  in sandbox_fs_write_at()
67 	if (ret == -1) {  in sandbox_fs_write_at()
69 		return ret;  in sandbox_fs_write_at()
75 		ret = -1;  in sandbox_fs_write_at()
77 		ret = 0;  in sandbox_fs_write_at()
81 	return ret;  in sandbox_fs_write_at()
87 	int ret;  in sandbox_fs_ls()  local
89 	ret = os_dirent_ls(dirname, &head);  in sandbox_fs_ls()
90 	if (ret)  in sandbox_fs_ls()
100 	return ret;  in sandbox_fs_ls()
106 	int ret;  in sandbox_fs_exists()  local
108 	ret = os_get_filesize(filename, &size);  in sandbox_fs_exists()
109 	return ret == 0;  in sandbox_fs_exists()
124 	int ret;  in fs_read_sandbox()  local
126 	ret = sandbox_fs_read_at(filename, offset, buf, len, actread);  in fs_read_sandbox()
127 	if (ret)  in fs_read_sandbox()
130 	return ret;  in fs_read_sandbox()
136 	int ret;  in fs_write_sandbox()  local
138 	ret = sandbox_fs_write_at(filename, offset, buf, len, actwrite);  in fs_write_sandbox()
139 	if (ret)  in fs_write_sandbox()
142 	return ret;  in fs_write_sandbox()