pub struct FileDesc(OwnedFd); impl FileDesc { //从文件描述符读出字节流pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> { let ret = cvt(unsafe { //调用libc的read函数 libc::read( //按C语言的调用进行转换 self.as_raw_fd(), //转换成void *指针 buf.as_mut_ptr() as ...
read_at(0, buffer.as_mut_slice())?; Ok(buffer) } } 解析各个字段 对于不同的字段进行不同的处理: os/src/memory/mapping/memory_set.rs 代码语言:javascript 复制 /// 通过 elf 文件创建内存映射(不包括栈) pub fn from_elf(file: &ElfFile, is_user: bool) -> MemoryResult<MemorySet> { //...
Read an environment variable with the name "FOO" and assign it to the string variable foo. If it does not exist or if the system does not support environment variables, assign a value of "none". 获取环境变量 代码语言:javascript 复制 packagemainimport("fmt""os")funcmain(){foo,ok:=os.L...
文件打开成功:File { fd: 3, path: "/Users/Admin/Downloads/guess-game-app/src/data.txt", read: true, write: false } 如果文件 data.txt 不存在,则会抛出以下错误 thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 2, kind: NotFound, message: "No...
文件打开成功:File { fd: 3, path: "/Users/yufei/Downloads/guess-game-app/src/data.txt", read: true, write: false } 1.如果文件 data.txt 不存在,则会抛出以下错误thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 2, kind: Not...
README.md Repository files navigation README CC0-1.0 license Awesome Rust A curated list of Rust code and resources. If you want to contribute, please read this. Table of contents Applications Audio and Music Blockchain Database Emulators File manager Games Graphics Image processing Industrial...
README.md RELEASES.md REUSE.toml config.example.toml configure license-metadata.json rust-bors.toml rustfmt.toml triagebot.toml x x.ps1 x.py Website|Getting started|Learn|Documentation|Contributing This is the main source code repository forRust. It contains the compiler, standard library, and ...
对于以JavaScript为主的Node.js开发者来说,你可能不太熟悉类似于“std::wx::y”或“&xyz”之类的表述,但是没关系,我会详细解释。 与JavaScript和Node.js相比,Rust是一门较为低级的语言。这意味着,你需要熟悉计算机的工作原理,才能真正理解Rust。而Node.js更为高级,通常接触不到这些表述。
Reading a Rust file with a buffer can be more efficient than reading the entire file at once because it allows the program to process the data in chunks. To read a file line by line using a buffer, you can use the BufReader struct and the BufRead trait: use std::fs::File; use st...
// 为 Scull 实现 file::Operations trait // 该 trait 定义了内核文件操作的各种方法,诸如 `open/read/write/seek/fsync/mmap/poll 等 // 对应于内核的 `file_operations` 结构体,支持多线程/多进程 // 该结构在include/linux/fs.h中定义,并保存指向由驱动程序定义的函数的指针, ...