wasmer_wasix/syscalls/wasi/
fd_filestat_get.rs1use super::*;
2use crate::syscalls::*;
3use crate::types::wasi::Snapshot0Filestat;
4
5#[instrument(level = "trace", skip_all, fields(%fd, size = field::Empty, mtime = field::Empty), ret)]
16pub fn fd_filestat_get<M: MemorySize>(
17 mut ctx: FunctionEnvMut<'_, WasiEnv>,
18 fd: WasiFd,
19 buf: WasmPtr<Filestat, M>,
20) -> Result<Errno, WasiError> {
21 WasiEnv::do_pending_operations(&mut ctx)?;
22
23 let stat = wasi_try_ok!(fd_filestat_get_internal(&mut ctx, fd));
24
25 Span::current().record("size", stat.st_size);
27 Span::current().record("mtime", stat.st_mtim);
28
29 let env = ctx.data();
30 let (memory, _) = unsafe { env.get_memory_and_wasi_state(&ctx, 0) };
31 let buf = buf.deref(&memory);
32 wasi_try_mem_ok!(buf.write(stat));
33
34 Ok(Errno::Success)
35}
36
37pub(crate) fn fd_filestat_get_internal(
48 ctx: &mut FunctionEnvMut<'_, WasiEnv>,
49 fd: WasiFd,
50) -> Result<Filestat, Errno> {
51 let env = ctx.data();
52 let (_, state, inodes) = unsafe { env.get_memory_and_wasi_state_and_inodes(&ctx, 0) };
53 let fd_entry = state.fs.get_fd(fd)?;
54 if !fd_entry.inner.rights.contains(Rights::FD_FILESTAT_GET) {
55 return Err(Errno::Access);
56 }
57
58 state.fs.filestat_fd(fd)
59}
60
61#[instrument(level = "trace", skip_all, fields(%fd), ret)]
72pub fn fd_filestat_get_old<M: MemorySize>(
73 mut ctx: FunctionEnvMut<'_, WasiEnv>,
74 fd: WasiFd,
75 buf: WasmPtr<Snapshot0Filestat, M>,
76) -> Errno {
77 let stat = wasi_try!(fd_filestat_get_internal(&mut ctx, fd));
78
79 let env = ctx.data();
80 let (memory, _) = unsafe { env.get_memory_and_wasi_state(&ctx, 0) };
81 let old_stat = Snapshot0Filestat {
82 st_dev: stat.st_dev,
83 st_ino: stat.st_ino,
84 st_filetype: stat.st_filetype,
85 st_nlink: stat.st_nlink as u32,
86 st_size: stat.st_size,
87 st_atim: stat.st_atim,
88 st_mtim: stat.st_mtim,
89 st_ctim: stat.st_ctim,
90 };
91
92 let buf = buf.deref(&memory);
93 wasi_try_mem!(buf.write(old_stat));
94
95 Errno::Success
96}