メモメモ os.Open

<- http://golang.org/pkg/os/

Package os

Overview ▾

Package os provides a platform-independent interface to operating system functionality. The design is Unix-like, although the error handling is Go-like; failing calls return values of type error rather than error numbers. Often, more information is available within the error. For example, if a call that takes a file name fails, such as Open or Stat, the error will include the failing file name when printed and will be of type *PathError, which may be unpacked for more information.

Here is a simple example, opening a file and reading some of it.

file, err := os.Open("file.go") // For read access.
if err != nil {
	log.Fatal(err)
}

data := make([]byte, 100)
count, err := file.Read(data)
if err != nil {
	log.Fatal(err)
}
fmt.Printf("read %d bytes: %q\n", count, data[:count])