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tutorial: update go_tutorial.html

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There's version skew with respect to the programs in doc/progs.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5433048
This commit is contained in:
Rob Pike 2011-11-22 11:53:30 -08:00
parent fe838c2ddb
commit 422e247332
1 changed files with 5 additions and 17 deletions
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22
doc/go_tutorial.html
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@ -557,10 +557,7 @@ exported factory to use is <code>OpenFile</code> (we'll explain that name in a m
<p> <p>
<pre><!--{{code "progs/file.go" `/func.OpenFile/` `/^}/`}} <pre><!--{{code "progs/file.go" `/func.OpenFile/` `/^}/`}}
-->func OpenFile(name string, mode int, perm uint32) (file *File, err error) { -->func OpenFile(name string, mode int, perm uint32) (file *File, err error) {
r, e := syscall.Open(name, mode, perm) r, err := syscall.Open(name, mode, perm)
if e != 0 {
err = os.Errno(e)
}
return newFile(r, name), err return newFile(r, name), err
} }
</pre> </pre>
@ -626,22 +623,16 @@ each of which declares a receiver variable <code>file</code>.
if file == nil { if file == nil {
return os.EINVAL return os.EINVAL
} }
e := syscall.Close(file.fd) err := syscall.Close(file.fd)
file.fd = -1 // so it can&#39;t be closed again file.fd = -1 // so it can&#39;t be closed again
if e != 0 { return err
return os.Errno(e)
}
return nil
} }
func (file *File) Read(b []byte) (ret int, err error) { func (file *File) Read(b []byte) (ret int, err error) {
if file == nil { if file == nil {
return -1, os.EINVAL return -1, os.EINVAL
} }
r, e := syscall.Read(file.fd, b) r, err := syscall.Read(file.fd, b)
if e != 0 {
err = os.Errno(e)
}
return int(r), err return int(r), err
} }
@ -649,10 +640,7 @@ func (file *File) Write(b []byte) (ret int, err error) {
if file == nil { if file == nil {
return -1, os.EINVAL return -1, os.EINVAL
} }
r, e := syscall.Write(file.fd, b) r, err := syscall.Write(file.fd, b)
if e != 0 {
err = os.Errno(e)
}
return int(r), err return int(r), err
} }