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Implement getcwd()

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This commit is contained in:
Wang Taojie
2024-10-10 21:09:41 +08:00
committed by Tate, Hongliang Tian
parent ea489252f4
commit bdf89a5de3
1 changed files with 17 additions and 4 deletions
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21
kernel/src/syscall/getcwd.rs
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@ -1,14 +1,27 @@
// SPDX-License-Identifier: MPL-2.0 // SPDX-License-Identifier: MPL-2.0
use super::SyscallReturn; use super::SyscallReturn;
use crate::prelude::*; use crate::{
fs::fs_resolver::{FsPath, AT_FDCWD},
prelude::*,
};
pub fn sys_getcwd(buf: Vaddr, len: usize, ctx: &Context) -> Result<SyscallReturn> { pub fn sys_getcwd(buf: Vaddr, len: usize, ctx: &Context) -> Result<SyscallReturn> {
// TODO: getcwd only return a fake result now let current = ctx.process;
let fake_cwd = CString::new("/")?; let dirent = current
let bytes = fake_cwd.as_bytes_with_nul(); .fs()
.read()
.lookup(&FsPath::new(AT_FDCWD, "").unwrap())
.unwrap();
let name = dirent.abs_path();
debug!("getcwd: {:?}", name);
let cwd = CString::new(name)?;
let bytes = cwd.as_bytes_with_nul();
let write_len = len.min(bytes.len()); let write_len = len.min(bytes.len());
ctx.get_user_space() ctx.get_user_space()
.write_bytes(buf, &mut VmReader::from(&bytes[..write_len]))?; .write_bytes(buf, &mut VmReader::from(&bytes[..write_len]))?;
Ok(SyscallReturn::Return(write_len as _)) Ok(SyscallReturn::Return(write_len as _))
} }