ggstd 0.1.0

// Copyright 2023 The rust-ggstd authors.
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

use super::fix_long_path;
use crate::syscall;
use crate::time;

// //go:build unix || (js && wasm) || windows

// package os

// import (
// 	"runtime"
// 	"syscall"
// 	"time"
// )

// fn sigpipe() // implemented in package runtime

// // Close closes the File, rendering it unusable for I/O.
// // On files that support SetDeadline, any pending I/O operations will
// // be canceled and return immediately with an ErrClosed error.
// // Close will return an error if it has already been called.
// fn (f *File) Close() error {
// 	if f == nil {
// 		return ErrInvalid
// 	}
// 	return f.file.close()
// }

// // read reads up to len(b) bytes from the File.
// // It returns the number of bytes read and an error, if any.
// fn (f *File) read(b []byte) (n int, err error) {
// 	n, err = f.pfd.Read(b)
// 	runtime.KeepAlive(f)
// 	return n, err
// }

// // pread reads len(b) bytes from the File starting at byte offset off.
// // It returns the number of bytes read and the error, if any.
// // EOF is signaled by a zero count with err set to nil.
// fn (f *File) pread(b []byte, off int64) (n int, err error) {
// 	n, err = f.pfd.Pread(b, off)
// 	runtime.KeepAlive(f)
// 	return n, err
// }

// // write writes len(b) bytes to the File.
// // It returns the number of bytes written and an error, if any.
// fn (f *File) write(b []byte) (n int, err error) {
// 	n, err = f.pfd.Write(b)
// 	runtime.KeepAlive(f)
// 	return n, err
// }

// // pwrite writes len(b) bytes to the File starting at byte offset off.
// // It returns the number of bytes written and an error, if any.
// fn (f *File) pwrite(b []byte, off int64) (n int, err error) {
// 	n, err = f.pfd.Pwrite(b, off)
// 	runtime.KeepAlive(f)
// 	return n, err
// }

// // syscallMode returns the syscall-specific mode bits from Go's portable mode bits.
// fn syscallMode(i FileMode) (o uint32) {
// 	o |= uint32(i.Perm())
// 	if i&ModeSetuid != 0 {
// 		o |= syscall.S_ISUID
// 	}
// 	if i&ModeSetgid != 0 {
// 		o |= syscall.S_ISGID
// 	}
// 	if i&ModeSticky != 0 {
// 		o |= syscall.S_ISVTX
// 	}
// 	// No mapping for Go's ModeTemporary (plan9 only).
// 	return
// }

// // See docs in file.go:Chmod.
// fn chmod(name string, mode FileMode) error {
// 	longName := fix_long_path(name)
// 	e := ignoringEINTR(fn() error {
// 		return syscall.Chmod(longName, syscallMode(mode))
// 	})
// 	if e != nil {
// 		return &PathError{Op: "chmod", Path: name, Err: e}
// 	}
// 	return nil
// }

// // See docs in file.go:(*File).Chmod.
// fn (f *File) chmod(mode FileMode) error {
// 	if err := f.checkValid("chmod"); err != nil {
// 		return err
// 	}
// 	if e := f.pfd.Fchmod(syscallMode(mode)); e != nil {
// 		return f.wrapErr("chmod", e)
// 	}
// 	return nil
// }

// // Chown changes the numeric uid and gid of the named file.
// // If the file is a symbolic link, it changes the uid and gid of the link's target.
// // A uid or gid of -1 means to not change that value.
// // If there is an error, it will be of type *PathError.
// //
// // On Windows or Plan 9, Chown always returns the syscall.EWINDOWS or
// // EPLAN9 error, wrapped in *PathError.
// fn Chown(name string, uid, gid int) error {
// 	e := ignoringEINTR(fn() error {
// 		return syscall.Chown(name, uid, gid)
// 	})
// 	if e != nil {
// 		return &PathError{Op: "chown", Path: name, Err: e}
// 	}
// 	return nil
// }

// // Lchown changes the numeric uid and gid of the named file.
// // If the file is a symbolic link, it changes the uid and gid of the link itself.
// // If there is an error, it will be of type *PathError.
// //
// // On Windows, it always returns the syscall.EWINDOWS error, wrapped
// // in *PathError.
// fn Lchown(name string, uid, gid int) error {
// 	e := ignoringEINTR(fn() error {
// 		return syscall.Lchown(name, uid, gid)
// 	})
// 	if e != nil {
// 		return &PathError{Op: "lchown", Path: name, Err: e}
// 	}
// 	return nil
// }

// // Chown changes the numeric uid and gid of the named file.
// // If there is an error, it will be of type *PathError.
// //
// // On Windows, it always returns the syscall.EWINDOWS error, wrapped
// // in *PathError.
// fn (f *File) Chown(uid, gid int) error {
// 	if err := f.checkValid("chown"); err != nil {
// 		return err
// 	}
// 	if e := f.pfd.Fchown(uid, gid); e != nil {
// 		return f.wrapErr("chown", e)
// 	}
// 	return nil
// }

// // Truncate changes the size of the file.
// // It does not change the I/O offset.
// // If there is an error, it will be of type *PathError.
// fn (f *File) Truncate(size int64) error {
// 	if err := f.checkValid("truncate"); err != nil {
// 		return err
// 	}
// 	if e := f.pfd.Ftruncate(size); e != nil {
// 		return f.wrapErr("truncate", e)
// 	}
// 	return nil
// }

// // Sync commits the current contents of the file to stable storage.
// // Typically, this means flushing the file system's in-memory copy
// // of recently written data to disk.
// fn (f *File) Sync() error {
// 	if err := f.checkValid("sync"); err != nil {
// 		return err
// 	}
// 	if e := f.pfd.Fsync(); e != nil {
// 		return f.wrapErr("sync", e)
// 	}
// 	return nil
// }

/// chtimes changes the access and modification times of the named
/// file, similar to the Unix utime() or utimes() functions.
///
/// The underlying filesystem may truncate or round the values to a
/// less precise time unit.
/// If there is an error, it will be of type *PathError.
pub fn chtimes(name: &str, atime: &time::Time, mtime: &time::Time) -> std::io::Result<()> {
    let utimes = [
        syscall::nsec_to_timespec(atime.unix_nano()),
        syscall::nsec_to_timespec(mtime.unix_nano()),
    ];
    syscall::utimes_nano(&fix_long_path(name), &utimes)
    // 	if e :=
    //  e != nil {
    // 		return &PathError{Op: "chtimes", Path: name, Err: e}
    // 	}
}

// // Chdir changes the current working directory to the file,
// // which must be a directory.
// // If there is an error, it will be of type *PathError.
// fn (f *File) Chdir() error {
// 	if err := f.checkValid("chdir"); err != nil {
// 		return err
// 	}
// 	if e := f.pfd.Fchdir(); e != nil {
// 		return f.wrapErr("chdir", e)
// 	}
// 	return nil
// }

// // setDeadline sets the read and write deadline.
// fn (f *File) setDeadline(t time.Time) error {
// 	if err := f.checkValid("SetDeadline"); err != nil {
// 		return err
// 	}
// 	return f.pfd.SetDeadline(t)
// }

// // setReadDeadline sets the read deadline.
// fn (f *File) setReadDeadline(t time.Time) error {
// 	if err := f.checkValid("SetReadDeadline"); err != nil {
// 		return err
// 	}
// 	return f.pfd.SetReadDeadline(t)
// }

// // setWriteDeadline sets the write deadline.
// fn (f *File) setWriteDeadline(t time.Time) error {
// 	if err := f.checkValid("SetWriteDeadline"); err != nil {
// 		return err
// 	}
// 	return f.pfd.SetWriteDeadline(t)
// }

// // checkValid checks whether f is valid for use.
// // If not, it returns an appropriate error, perhaps incorporating the operation name op.
// fn (f *File) checkValid(op string) error {
// 	if f == nil {
// 		return ErrInvalid
// 	}
// 	return nil
// }

// // ignoringEINTR makes a function call and repeats it if it returns an
// // EINTR error. This appears to be required even though we install all
// // signal handlers with SA_RESTART: see #22838, #38033, #38836, #40846.
// // Also #20400 and #36644 are issues in which a signal handler is
// // installed without setting SA_RESTART. None of these are the common case,
// // but there are enough of them that it seems that we can't avoid
// // an EINTR loop.
// fn ignoringEINTR(fn fn() error) error {
// 	for {
// 		err := fn()
// 		if err != syscall.EINTR {
// 			return err
// 		}
// 	}
// }