7a9389330e
gcc/: * gcc.c (default_compilers): Add entry for ".go". * common.opt: Add -static-libgo as a driver option. * doc/install.texi (Configuration): Mention libgo as an option for --enable-shared. Mention go as an option for --enable-languages. * doc/invoke.texi (Overall Options): Mention .go as a file name suffix. Mention go as a -x option. * doc/frontends.texi (G++ and GCC): Mention Go as a supported language. * doc/sourcebuild.texi (Top Level): Mention libgo. * doc/standards.texi (Standards): Add section on Go language. Move references for other languages into their own section. * doc/contrib.texi (Contributors): Mention that I contributed the Go frontend. gcc/testsuite/: * lib/go.exp: New file. * lib/go-dg.exp: New file. * lib/go-torture.exp: New file. * lib/target-supports.exp (check_compile): Match // Go. From-SVN: r167407
103 lines
3 KiB
Go
103 lines
3 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package os
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import (
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"runtime"
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"syscall"
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)
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// Auxiliary information if the File describes a directory
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type dirInfo struct {
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buf []byte // buffer for directory I/O
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dir *syscall.DIR // from opendir
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}
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// DevNull is the name of the operating system's ``null device.''
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// On Unix-like systems, it is "/dev/null"; on Windows, "NUL".
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const DevNull = "/dev/null"
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// Open opens the named file with specified flag (O_RDONLY etc.) and perm, (0666 etc.)
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// if applicable. If successful, methods on the returned File can be used for I/O.
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// It returns the File and an Error, if any.
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func Open(name string, flag int, perm uint32) (file *File, err Error) {
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r, e := syscall.Open(name, flag|syscall.O_CLOEXEC, perm)
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if e != 0 {
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return nil, &PathError{"open", name, Errno(e)}
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}
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// There's a race here with fork/exec, which we are
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// content to live with. See ../syscall/exec.go
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if syscall.O_CLOEXEC == 0 { // O_CLOEXEC not supported
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syscall.CloseOnExec(r)
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}
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return NewFile(r, name), nil
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}
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// Close closes the File, rendering it unusable for I/O.
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// It returns an Error, if any.
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func (file *File) Close() Error {
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if file == nil || file.fd < 0 {
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return EINVAL
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}
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var err Error
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if e := syscall.Close(file.fd); e != 0 {
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err = &PathError{"close", file.name, Errno(e)}
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}
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file.fd = -1 // so it can't be closed again
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// no need for a finalizer anymore
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runtime.SetFinalizer(file, nil)
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return err
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}
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// Stat returns the FileInfo structure describing file.
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// It returns the FileInfo and an error, if any.
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func (file *File) Stat() (fi *FileInfo, err Error) {
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var stat syscall.Stat_t
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e := syscall.Fstat(file.fd, &stat)
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if e != 0 {
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return nil, &PathError{"stat", file.name, Errno(e)}
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}
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return fileInfoFromStat(file.name, new(FileInfo), &stat, &stat), nil
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}
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// Readdir reads the contents of the directory associated with file and
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// returns an array of up to count FileInfo structures, as would be returned
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// by Lstat, in directory order. Subsequent calls on the same file will yield
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// further FileInfos.
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// A negative count means to read until EOF.
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// Readdir returns the array and an Error, if any.
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func (file *File) Readdir(count int) (fi []FileInfo, err Error) {
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dirname := file.name
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if dirname == "" {
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dirname = "."
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}
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dirname += "/"
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names, err1 := file.Readdirnames(count)
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if err1 != nil {
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return nil, err1
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}
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fi = make([]FileInfo, len(names))
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for i, filename := range names {
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fip, err := Lstat(dirname + filename)
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if fip == nil || err != nil {
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fi[i].Name = filename // rest is already zeroed out
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} else {
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fi[i] = *fip
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}
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}
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return
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}
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// Truncate changes the size of the named file.
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// If the file is a symbolic link, it changes the size of the link's target.
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func Truncate(name string, size int64) Error {
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if e := syscall.Truncate(name, size); e != 0 {
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return &PathError{"truncate", name, Errno(e)}
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}
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return nil
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}
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