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-rw-r--r--src/pkg/os/file.go224
1 files changed, 112 insertions, 112 deletions
diff --git a/src/pkg/os/file.go b/src/pkg/os/file.go
index 459b78cc2..87a2925e9 100644
--- a/src/pkg/os/file.go
+++ b/src/pkg/os/file.go
@@ -7,80 +7,80 @@
package os
import (
- "syscall";
+ "syscall"
)
// Auxiliary information if the File describes a directory
type dirInfo struct {
- buf []byte; // buffer for directory I/O
- nbuf int; // length of buf; return value from Getdirentries
- bufp int; // location of next record in buf.
+ buf []byte // buffer for directory I/O
+ nbuf int // length of buf; return value from Getdirentries
+ bufp int // location of next record in buf.
}
// File represents an open file descriptor.
type File struct {
- fd int;
- name string;
- dirinfo *dirInfo; // nil unless directory being read
- nepipe int; // number of consecutive EPIPE in Write
+ fd int
+ name string
+ dirinfo *dirInfo // nil unless directory being read
+ nepipe int // number of consecutive EPIPE in Write
}
// Fd returns the integer Unix file descriptor referencing the open file.
-func (file *File) Fd() int { return file.fd }
+func (file *File) Fd() int { return file.fd }
// Name returns the name of the file as presented to Open.
-func (file *File) Name() string { return file.name }
+func (file *File) Name() string { return file.name }
// NewFile returns a new File with the given file descriptor and name.
func NewFile(fd int, name string) *File {
if fd < 0 {
return nil
}
- return &File{fd, name, nil, 0};
+ return &File{fd, name, nil, 0}
}
// Stdin, Stdout, and Stderr are open Files pointing to the standard input,
// standard output, and standard error file descriptors.
var (
- Stdin = NewFile(0, "/dev/stdin");
- Stdout = NewFile(1, "/dev/stdout");
- Stderr = NewFile(2, "/dev/stderr");
+ Stdin = NewFile(0, "/dev/stdin")
+ Stdout = NewFile(1, "/dev/stdout")
+ Stderr = NewFile(2, "/dev/stderr")
)
// Flags to Open wrapping those of the underlying system. Not all flags
// may be implemented on a given system.
const (
- O_RDONLY = syscall.O_RDONLY; // open the file read-only.
- O_WRONLY = syscall.O_WRONLY; // open the file write-only.
- O_RDWR = syscall.O_RDWR; // open the file read-write.
- O_APPEND = syscall.O_APPEND; // open the file append-only.
- O_ASYNC = syscall.O_ASYNC; // generate a signal when I/O is available.
- O_CREAT = syscall.O_CREAT; // create a new file if none exists.
- O_EXCL = syscall.O_EXCL; // used with O_CREAT, file must not exist
- O_NOCTTY = syscall.O_NOCTTY; // do not make file the controlling tty.
- O_NONBLOCK = syscall.O_NONBLOCK; // open in non-blocking mode.
- O_NDELAY = O_NONBLOCK; // synonym for O_NONBLOCK
- O_SYNC = syscall.O_SYNC; // open for synchronous I/O.
- O_TRUNC = syscall.O_TRUNC; // if possible, truncate file when opened.
- O_CREATE = O_CREAT; // create a new file if none exists.
+ O_RDONLY = syscall.O_RDONLY // open the file read-only.
+ O_WRONLY = syscall.O_WRONLY // open the file write-only.
+ O_RDWR = syscall.O_RDWR // open the file read-write.
+ O_APPEND = syscall.O_APPEND // open the file append-only.
+ O_ASYNC = syscall.O_ASYNC // generate a signal when I/O is available.
+ O_CREAT = syscall.O_CREAT // create a new file if none exists.
+ O_EXCL = syscall.O_EXCL // used with O_CREAT, file must not exist
+ O_NOCTTY = syscall.O_NOCTTY // do not make file the controlling tty.
+ O_NONBLOCK = syscall.O_NONBLOCK // open in non-blocking mode.
+ O_NDELAY = O_NONBLOCK // synonym for O_NONBLOCK
+ O_SYNC = syscall.O_SYNC // open for synchronous I/O.
+ O_TRUNC = syscall.O_TRUNC // if possible, truncate file when opened.
+ O_CREATE = O_CREAT // create a new file if none exists.
)
// Open opens the named file with specified flag (O_RDONLY etc.) and perm, (0666 etc.)
// if applicable. If successful, methods on the returned File can be used for I/O.
// It returns the File and an Error, if any.
func Open(name string, flag int, perm int) (file *File, err Error) {
- r, e := syscall.Open(name, flag|syscall.O_CLOEXEC, perm);
+ r, e := syscall.Open(name, flag|syscall.O_CLOEXEC, perm)
if e != 0 {
return nil, &PathError{"open", name, Errno(e)}
}
// There's a race here with fork/exec, which we are
// content to live with. See ../syscall/exec.go
- if syscall.O_CLOEXEC == 0 { // O_CLOEXEC not supported
+ if syscall.O_CLOEXEC == 0 { // O_CLOEXEC not supported
syscall.CloseOnExec(r)
}
- return NewFile(r, name), nil;
+ return NewFile(r, name), nil
}
// Close closes the File, rendering it unusable for I/O.
@@ -89,17 +89,17 @@ func (file *File) Close() Error {
if file == nil {
return EINVAL
}
- var err Error;
+ var err Error
if e := syscall.Close(file.fd); e != 0 {
err = &PathError{"close", file.name, Errno(e)}
}
- file.fd = -1; // so it can't be closed again
- return err;
+ file.fd = -1 // so it can't be closed again
+ return err
}
type eofError int
-func (eofError) String() string { return "EOF" }
+func (eofError) String() string { return "EOF" }
// EOF is the Error returned by Read when no more input is available.
// Functions should return EOF only to signal a graceful end of input.
@@ -115,7 +115,7 @@ func (file *File) Read(b []byte) (n int, err Error) {
if file == nil {
return 0, EINVAL
}
- n, e := syscall.Read(file.fd, b);
+ n, e := syscall.Read(file.fd, b)
if n < 0 {
n = 0
}
@@ -125,7 +125,7 @@ func (file *File) Read(b []byte) (n int, err Error) {
if e != 0 {
err = &PathError{"read", file.name, Errno(e)}
}
- return n, err;
+ return n, err
}
// ReadAt reads len(b) bytes from the File starting at byte offset off.
@@ -137,19 +137,19 @@ func (file *File) ReadAt(b []byte, off int64) (n int, err Error) {
return 0, EINVAL
}
for len(b) > 0 {
- m, e := syscall.Pread(file.fd, b, off);
+ m, e := syscall.Pread(file.fd, b, off)
if m == 0 && e == 0 {
return n, EOF
}
if e != 0 {
- err = &PathError{"read", file.name, Errno(e)};
- break;
+ err = &PathError{"read", file.name, Errno(e)}
+ break
}
- n += m;
- b = b[m:];
- off += int64(m);
+ n += m
+ b = b[m:]
+ off += int64(m)
}
- return;
+ return
}
// Write writes len(b) bytes to the File.
@@ -159,12 +159,12 @@ func (file *File) Write(b []byte) (n int, err Error) {
if file == nil {
return 0, EINVAL
}
- n, e := syscall.Write(file.fd, b);
+ n, e := syscall.Write(file.fd, b)
if n < 0 {
n = 0
}
if e == syscall.EPIPE {
- file.nepipe++;
+ file.nepipe++
if file.nepipe >= 10 {
Exit(syscall.EPIPE)
}
@@ -174,7 +174,7 @@ func (file *File) Write(b []byte) (n int, err Error) {
if e != 0 {
err = &PathError{"write", file.name, Errno(e)}
}
- return n, err;
+ return n, err
}
// WriteAt writes len(b) bytes to the File starting at byte offset off.
@@ -185,16 +185,16 @@ func (file *File) WriteAt(b []byte, off int64) (n int, err Error) {
return 0, EINVAL
}
for len(b) > 0 {
- m, e := syscall.Pwrite(file.fd, b, off);
+ m, e := syscall.Pwrite(file.fd, b, off)
if e != 0 {
- err = &PathError{"write", file.name, Errno(e)};
- break;
+ err = &PathError{"write", file.name, Errno(e)}
+ break
}
- n += m;
- b = b[m:];
- off += int64(m);
+ n += m
+ b = b[m:]
+ off += int64(m)
}
- return;
+ return
}
// Seek sets the offset for the next Read or Write on file to offset, interpreted
@@ -202,14 +202,14 @@ func (file *File) WriteAt(b []byte, off int64) (n int, err Error) {
// relative to the current offset, and 2 means relative to the end.
// It returns the new offset and an Error, if any.
func (file *File) Seek(offset int64, whence int) (ret int64, err Error) {
- r, e := syscall.Seek(file.fd, offset, whence);
+ r, e := syscall.Seek(file.fd, offset, whence)
if e == 0 && file.dirinfo != nil && r != 0 {
e = syscall.EISDIR
}
if e != 0 {
return 0, &PathError{"seek", file.name, Errno(e)}
}
- return r, nil;
+ return r, nil
}
// WriteString is like Write, but writes the contents of string s rather than
@@ -218,38 +218,38 @@ func (file *File) WriteString(s string) (ret int, err Error) {
if file == nil {
return 0, EINVAL
}
- b := syscall.StringByteSlice(s);
- b = b[0 : len(b)-1];
- return file.Write(b);
+ b := syscall.StringByteSlice(s)
+ b = b[0 : len(b)-1]
+ return file.Write(b)
}
// Pipe returns a connected pair of Files; reads from r return bytes written to w.
// It returns the files and an Error, if any.
func Pipe() (r *File, w *File, err Error) {
- var p [2]int;
+ var p [2]int
// See ../syscall/exec.go for description of lock.
- syscall.ForkLock.RLock();
- e := syscall.Pipe(&p);
+ syscall.ForkLock.RLock()
+ e := syscall.Pipe(&p)
if e != 0 {
- syscall.ForkLock.RUnlock();
- return nil, nil, NewSyscallError("pipe", e);
+ syscall.ForkLock.RUnlock()
+ return nil, nil, NewSyscallError("pipe", e)
}
- syscall.CloseOnExec(p[0]);
- syscall.CloseOnExec(p[1]);
- syscall.ForkLock.RUnlock();
+ syscall.CloseOnExec(p[0])
+ syscall.CloseOnExec(p[1])
+ syscall.ForkLock.RUnlock()
- return NewFile(p[0], "|0"), NewFile(p[1], "|1"), nil;
+ return NewFile(p[0], "|0"), NewFile(p[1], "|1"), nil
}
// Mkdir creates a new directory with the specified name and permission bits.
// It returns an error, if any.
func Mkdir(name string, perm int) Error {
- e := syscall.Mkdir(name, perm);
+ e := syscall.Mkdir(name, perm)
if e != 0 {
return &PathError{"mkdir", name, Errno(e)}
}
- return nil;
+ return nil
}
// Stat returns a Dir structure describing the named file and an error, if any.
@@ -258,42 +258,42 @@ func Mkdir(name string, perm int) Error {
// If name names an invalid symbolic link, the returned Dir describes
// the link itself and has dir.FollowedSymlink set to false.
func Stat(name string) (dir *Dir, err Error) {
- var lstat, stat syscall.Stat_t;
- e := syscall.Lstat(name, &lstat);
+ var lstat, stat syscall.Stat_t
+ e := syscall.Lstat(name, &lstat)
if e != 0 {
return nil, &PathError{"stat", name, Errno(e)}
}
- statp := &lstat;
+ statp := &lstat
if lstat.Mode&syscall.S_IFMT == syscall.S_IFLNK {
- e := syscall.Stat(name, &stat);
+ e := syscall.Stat(name, &stat)
if e == 0 {
statp = &stat
}
}
- return dirFromStat(name, new(Dir), &lstat, statp), nil;
+ return dirFromStat(name, new(Dir), &lstat, statp), nil
}
// Stat returns the Dir structure describing file.
// It returns the Dir and an error, if any.
func (file *File) Stat() (dir *Dir, err Error) {
- var stat syscall.Stat_t;
- e := syscall.Fstat(file.fd, &stat);
+ var stat syscall.Stat_t
+ e := syscall.Fstat(file.fd, &stat)
if e != 0 {
return nil, &PathError{"stat", file.name, Errno(e)}
}
- return dirFromStat(file.name, new(Dir), &stat, &stat), nil;
+ return dirFromStat(file.name, new(Dir), &stat, &stat), nil
}
// Lstat returns the Dir structure describing the named file and an error, if any.
// If the file is a symbolic link, the returned Dir describes the
// symbolic link. Lstat makes no attempt to follow the link.
func Lstat(name string) (dir *Dir, err Error) {
- var stat syscall.Stat_t;
- e := syscall.Lstat(name, &stat);
+ var stat syscall.Stat_t
+ e := syscall.Lstat(name, &stat)
if e != 0 {
return nil, &PathError{"lstat", name, Errno(e)}
}
- return dirFromStat(name, new(Dir), &stat, &stat), nil;
+ return dirFromStat(name, new(Dir), &stat, &stat), nil
}
// Readdir reads the contents of the directory associated with file and
@@ -302,25 +302,25 @@ func Lstat(name string) (dir *Dir, err Error) {
// A negative count means to read until EOF.
// Readdir returns the array and an Error, if any.
func (file *File) Readdir(count int) (dirs []Dir, err Error) {
- dirname := file.name;
+ dirname := file.name
if dirname == "" {
dirname = "."
}
- dirname += "/";
- names, err1 := file.Readdirnames(count);
+ dirname += "/"
+ names, err1 := file.Readdirnames(count)
if err1 != nil {
return nil, err1
}
- dirs = make([]Dir, len(names));
+ dirs = make([]Dir, len(names))
for i, filename := range names {
- dirp, err := Lstat(dirname + filename);
+ dirp, err := Lstat(dirname + filename)
if dirp == nil || err != nil {
- dirs[i].Name = filename // rest is already zeroed out
+ dirs[i].Name = filename // rest is already zeroed out
} else {
dirs[i] = *dirp
}
}
- return;
+ return
}
// Chdir changes the current working directory to the named directory.
@@ -328,7 +328,7 @@ func Chdir(dir string) Error {
if e := syscall.Chdir(dir); e != 0 {
return &PathError{"chdir", dir, Errno(e)}
}
- return nil;
+ return nil
}
// Chdir changes the current working directory to the file,
@@ -337,7 +337,7 @@ func (f *File) Chdir() Error {
if e := syscall.Fchdir(f.fd); e != 0 {
return &PathError{"chdir", f.name, Errno(e)}
}
- return nil;
+ return nil
}
// Remove removes the named file or directory.
@@ -346,11 +346,11 @@ func Remove(name string) Error {
// whether name is a file or directory.
// Try both: it is cheaper on average than
// doing a Stat plus the right one.
- e := syscall.Unlink(name);
+ e := syscall.Unlink(name)
if e == 0 {
return nil
}
- e1 := syscall.Rmdir(name);
+ e1 := syscall.Rmdir(name)
if e1 == 0 {
return nil
}
@@ -367,16 +367,16 @@ func Remove(name string) Error {
if e1 != syscall.ENOTDIR {
e = e1
}
- return &PathError{"remove", name, Errno(e)};
+ return &PathError{"remove", name, Errno(e)}
}
// LinkError records an error during a link or symlink or rename
// system call and the paths that caused it.
type LinkError struct {
- Op string;
- Old string;
- New string;
- Error Error;
+ Op string
+ Old string
+ New string
+ Error Error
}
func (e *LinkError) String() string {
@@ -385,28 +385,28 @@ func (e *LinkError) String() string {
// Link creates a hard link.
func Link(oldname, newname string) Error {
- e := syscall.Link(oldname, newname);
+ e := syscall.Link(oldname, newname)
if e != 0 {
return &LinkError{"link", oldname, newname, Errno(e)}
}
- return nil;
+ return nil
}
// Symlink creates a symbolic link.
func Symlink(oldname, newname string) Error {
- e := syscall.Symlink(oldname, newname);
+ e := syscall.Symlink(oldname, newname)
if e != 0 {
return &LinkError{"symlink", oldname, newname, Errno(e)}
}
- return nil;
+ return nil
}
// Readlink reads the contents of a symbolic link: the destination of
// the link. It returns the contents and an Error, if any.
func Readlink(name string) (string, Error) {
for len := 128; ; len *= 2 {
- b := make([]byte, len);
- n, e := syscall.Readlink(name, b);
+ b := make([]byte, len)
+ n, e := syscall.Readlink(name, b)
if e != 0 {
return "", &PathError{"readlink", name, Errno(e)}
}
@@ -415,16 +415,16 @@ func Readlink(name string) (string, Error) {
}
}
// Silence 6g.
- return "", nil;
+ return "", nil
}
// Rename renames a file.
func Rename(oldname, newname string) Error {
- e := syscall.Rename(oldname, newname);
+ e := syscall.Rename(oldname, newname)
if e != 0 {
return &LinkError{"rename", oldname, newname, Errno(e)}
}
- return nil;
+ return nil
}
// Chmod changes the mode of the named file to mode.
@@ -433,7 +433,7 @@ func Chmod(name string, mode int) Error {
if e := syscall.Chmod(name, mode); e != 0 {
return &PathError{"chmod", name, Errno(e)}
}
- return nil;
+ return nil
}
// Chmod changes the mode of the file to mode.
@@ -441,7 +441,7 @@ func (f *File) Chmod(mode int) Error {
if e := syscall.Fchmod(f.fd, mode); e != 0 {
return &PathError{"chmod", f.name, Errno(e)}
}
- return nil;
+ return nil
}
// Chown changes the numeric uid and gid of the named file.
@@ -450,7 +450,7 @@ func Chown(name string, uid, gid int) Error {
if e := syscall.Chown(name, uid, gid); e != 0 {
return &PathError{"chown", name, Errno(e)}
}
- return nil;
+ return nil
}
// Lchown changes the numeric uid and gid of the named file.
@@ -459,7 +459,7 @@ func Lchown(name string, uid, gid int) Error {
if e := syscall.Lchown(name, uid, gid); e != 0 {
return &PathError{"lchown", name, Errno(e)}
}
- return nil;
+ return nil
}
// Chown changes the numeric uid and gid of the named file.
@@ -467,7 +467,7 @@ func (f *File) Chown(uid, gid int) Error {
if e := syscall.Fchown(f.fd, uid, gid); e != 0 {
return &PathError{"chown", f.name, Errno(e)}
}
- return nil;
+ return nil
}
// Truncate changes the size of the named file.
@@ -476,7 +476,7 @@ func Truncate(name string, size int64) Error {
if e := syscall.Truncate(name, size); e != 0 {
return &PathError{"truncate", name, Errno(e)}
}
- return nil;
+ return nil
}
// Truncate changes the size of the file.
@@ -485,5 +485,5 @@ func (f *File) Truncate(size int64) Error {
if e := syscall.Ftruncate(f.fd, size); e != 0 {
return &PathError{"truncate", f.name, Errno(e)}
}
- return nil;
+ return nil
}
generated by cgit v1.2.3 (git 2.46.0) at 2025-10-12 09:37:22 +0000