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@@ -7,6 +7,7 @@ use crate::{
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io::SeekFrom,
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kerror,
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syscall::{Syscall, SystemError},
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+ time::TimeSpec,
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};
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use super::{
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@@ -22,6 +23,102 @@ pub const SEEK_CUR: u32 = 1;
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pub const SEEK_END: u32 = 2;
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pub const SEEK_MAX: u32 = 3;
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+bitflags! {
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+ /// 文件类型和权限
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+ pub struct ModeType: u32 {
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+ /// 掩码
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+ const S_IFMT = 0o0_170_000;
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+ /// 文件类型
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+ const S_IFSOCK = 0o140000;
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+ const S_IFLNK = 0o120000;
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+ const S_IFREG = 0o100000;
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+ const S_IFBLK = 0o060000;
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+ const S_IFDIR = 0o040000;
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+ const S_IFCHR = 0o020000;
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+ const S_IFIFO = 0o010000;
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+
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+ const S_ISUID = 0o004000;
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+ const S_ISGID = 0o002000;
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+ const S_ISVTX = 0o001000;
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+ /// 文件用户权限
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+ const S_IRWXU = 0o0700;
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+ const S_IRUSR = 0o0400;
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+ const S_IWUSR = 0o0200;
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+ const S_IXUSR = 0o0100;
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+ /// 文件组权限
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+ const S_IRWXG = 0o0070;
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+ const S_IRGRP = 0o0040;
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+ const S_IWGRP = 0o0020;
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+ const S_IXGRP = 0o0010;
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+ /// 文件其他用户权限
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+ const S_IRWXO = 0o0007;
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+ const S_IROTH = 0o0004;
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+ const S_IWOTH = 0o0002;
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+ const S_IXOTH = 0o0001;
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+ }
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+}
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+
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+#[repr(C)]
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+/// # 文件信息结构体
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+pub struct PosixKstat {
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+ /// 硬件设备ID
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+ dev_id: u64,
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+ /// inode号
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+ inode: u64,
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+ /// 硬链接数
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+ nlink: u64,
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+ /// 文件权限
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+ mode: ModeType,
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+ /// 所有者用户ID
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+ uid: i32,
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+ /// 所有者组ID
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+ gid: i32,
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+ /// 设备ID
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+ rdev: i64,
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+ /// 文件大小
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+ size: i64,
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+ /// 文件系统块大小
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+ blcok_size: i64,
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+ /// 分配的512B块数
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+ blocks: u64,
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+ /// 最后访问时间
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+ atime: TimeSpec,
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+ /// 最后修改时间
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+ mtime: TimeSpec,
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+ /// 最后状态变化时间
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+ ctime: TimeSpec,
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+ /// 用于填充结构体大小的空白数据
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+ pub _pad: [i8; 24],
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+}
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+impl PosixKstat {
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+ fn new() -> Self {
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+ Self {
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+ inode: 0,
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+ dev_id: 0,
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+ mode: ModeType { bits: 0 },
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+ nlink: 0,
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+ uid: 0,
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+ gid: 0,
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+ rdev: 0,
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+ size: 0,
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+ atime: TimeSpec {
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+ tv_sec: 0,
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+ tv_nsec: 0,
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+ },
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+ mtime: TimeSpec {
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+ tv_sec: 0,
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+ tv_nsec: 0,
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+ },
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+ ctime: TimeSpec {
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+ tv_sec: 0,
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+ tv_nsec: 0,
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+ },
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+ blcok_size: 0,
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+ blocks: 0,
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+ _pad: Default::default(),
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+ }
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+ }
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+}
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impl Syscall {
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/// @brief 为当前进程打开一个文件
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///
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@@ -474,6 +571,66 @@ impl Syscall {
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}
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return Err(SystemError::EBADF);
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}
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+ fn do_fstat(fd: i32) -> Result<PosixKstat, SystemError> {
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+ let cur = current_pcb();
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+ match cur.get_file_ref_by_fd(fd) {
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+ Some(file) => {
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+ let mut kstat = PosixKstat::new();
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+ // 获取文件信息
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+ match file.metadata() {
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+ Ok(metadata) => {
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+ kstat.size = metadata.size as i64;
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+ kstat.dev_id = metadata.dev_id as u64;
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+ kstat.inode = metadata.inode_id as u64;
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+ kstat.blcok_size = metadata.blk_size as i64;
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+ kstat.blocks = metadata.blocks as u64;
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+
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+ kstat.atime.tv_sec = metadata.atime.tv_sec;
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+ kstat.atime.tv_nsec = metadata.atime.tv_nsec;
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+ kstat.mtime.tv_sec = metadata.mtime.tv_sec;
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+ kstat.mtime.tv_nsec = metadata.mtime.tv_nsec;
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+ kstat.ctime.tv_sec = metadata.ctime.tv_sec;
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+ kstat.ctime.tv_nsec = metadata.ctime.tv_nsec;
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+
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+ kstat.nlink = metadata.nlinks as u64;
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+ kstat.uid = metadata.uid as i32;
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+ kstat.gid = metadata.gid as i32;
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+ kstat.rdev = metadata.raw_dev as i64;
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+ kstat.mode.bits = metadata.mode;
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+ match file.file_type() {
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+ FileType::File => kstat.mode.insert(ModeType::S_IFMT),
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+ FileType::Dir => kstat.mode.insert(ModeType::S_IFDIR),
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+ FileType::BlockDevice => kstat.mode.insert(ModeType::S_IFBLK),
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+ FileType::CharDevice => kstat.mode.insert(ModeType::S_IFCHR),
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+ FileType::SymLink => kstat.mode.insert(ModeType::S_IFLNK),
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+ FileType::Socket => kstat.mode.insert(ModeType::S_IFSOCK),
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+ FileType::Pipe => kstat.mode.insert(ModeType::S_IFIFO),
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+ }
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+ }
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+ Err(e) => return Err(e),
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+ }
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+
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+ return Ok(kstat);
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+ }
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+ None => {
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+ return Err(SystemError::EINVAL);
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+ }
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+ }
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+ }
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+ pub fn fstat(fd: i32, usr_kstat: *mut PosixKstat) -> Result<usize, SystemError> {
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+ match Self::do_fstat(fd) {
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+ Ok(kstat) => {
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+ if usr_kstat.is_null() {
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+ return Err(SystemError::EFAULT);
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+ }
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+ unsafe {
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+ *usr_kstat = kstat;
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+ }
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+ return Ok(0);
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+ }
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+ Err(e) => return Err(e),
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+ }
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+ }
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}
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#[repr(C)]
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houmkh