wasmer_wasix/syscalls/wasi/
fd_filestat_set_times.rs

1use std::borrow::BorrowMut;
2
3use super::*;
4use crate::syscalls::*;
5
6/// ### `fd_filestat_set_times()`
7/// Set timestamp metadata on a file
8/// Inputs:
9/// - `Timestamp st_atim`
10///     Last accessed time
11/// - `Timestamp st_mtim`
12///     Last modified time
13/// - `Fstflags fst_flags`
14///     Bit-vector for controlling which times get set
15#[instrument(level = "trace", skip_all, fields(%fd, %st_atim, %st_mtim), ret)]
16pub fn fd_filestat_set_times(
17    mut ctx: FunctionEnvMut<'_, WasiEnv>,
18    fd: WasiFd,
19    st_atim: Timestamp,
20    st_mtim: Timestamp,
21    fst_flags: Fstflags,
22) -> Result<Errno, WasiError> {
23    WasiEnv::do_pending_operations(&mut ctx)?;
24
25    wasi_try_ok!(fd_filestat_set_times_internal(
26        &mut ctx, fd, st_atim, st_mtim, fst_flags
27    ));
28    let env = ctx.data();
29
30    #[cfg(feature = "journal")]
31    if env.enable_journal {
32        JournalEffector::save_fd_set_times(&mut ctx, fd, st_atim, st_mtim, fst_flags).map_err(
33            |err| {
34                tracing::error!("failed to save file set times event - {}", err);
35                WasiError::Exit(ExitCode::from(Errno::Fault))
36            },
37        )?;
38    }
39
40    Ok(Errno::Success)
41}
42
43pub(crate) fn fd_filestat_set_times_internal(
44    ctx: &mut FunctionEnvMut<'_, WasiEnv>,
45    fd: WasiFd,
46    st_atim: Timestamp,
47    st_mtim: Timestamp,
48    fst_flags: Fstflags,
49) -> Result<(), Errno> {
50    let env = ctx.data();
51    let (_, mut state) = unsafe { env.get_memory_and_wasi_state(&ctx, 0) };
52    let fd_entry = state.fs.get_fd(fd)?;
53
54    if !fd_entry
55        .inner
56        .rights
57        .contains(Rights::FD_FILESTAT_SET_TIMES)
58    {
59        return Err(Errno::Access);
60    }
61
62    if (fst_flags.contains(Fstflags::SET_ATIM) && fst_flags.contains(Fstflags::SET_ATIM_NOW))
63        || (fst_flags.contains(Fstflags::SET_MTIM) && fst_flags.contains(Fstflags::SET_MTIM_NOW))
64    {
65        return Err(Errno::Inval);
66    }
67
68    let inode = fd_entry.inode;
69
70    let mut atime = None;
71    let mut mtime = None;
72
73    if fst_flags.contains(Fstflags::SET_ATIM) || fst_flags.contains(Fstflags::SET_ATIM_NOW) {
74        let time_to_set = if fst_flags.contains(Fstflags::SET_ATIM) {
75            st_atim
76        } else {
77            get_current_time_in_nanos()?
78        };
79        inode.stat.write().unwrap().st_atim = time_to_set;
80        atime = Some(time_to_set);
81    }
82
83    if fst_flags.contains(Fstflags::SET_MTIM) || fst_flags.contains(Fstflags::SET_MTIM_NOW) {
84        let time_to_set = if fst_flags.contains(Fstflags::SET_MTIM) {
85            st_mtim
86        } else {
87            get_current_time_in_nanos()?
88        };
89        inode.stat.write().unwrap().st_mtim = time_to_set;
90        mtime = Some(time_to_set);
91    }
92
93    if let Kind::File {
94        handle: Some(handle),
95        ..
96    } = inode.kind.write().unwrap().deref()
97    {
98        let mut handle = handle.write().unwrap();
99
100        handle.set_times(atime, mtime);
101    }
102
103    Ok(())
104}
wasmer_wasix/syscalls/wasi/fd_filestat_set_times.rs

wasmer_wasix/syscalls/wasi/
fd_filestat_set_times.rs
