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package file
import (
"fmt"
"os"
"strconv"
"strings"
)
type File interface {
String() string
Name() string
}
type FdFile struct {
fd int32
name string
}
func NewFd(fd int32, name string) FdFile {
return FdFile{fd, name}
}
func NewFdWithPid(fd int32, pid uint32) FdFile {
if linkName, err := os.Readlink(fmt.Sprintf("/proc/%d/fd/%d", pid, fd)); err == nil {
return FdFile{fd, linkName}
}
return FdFile{fd, "?"}
}
func (f FdFile) Name() string {
return f.name
}
func (f FdFile) String() string {
var sb strings.Builder
if len(f.name) == 0 {
sb.WriteString("?")
} else {
sb.WriteString(f.name)
sb.WriteString(" (")
sb.WriteString(strconv.FormatInt(int64(f.fd), 10))
sb.WriteString(")")
}
return sb.String()
}
type OldnameNewnameFile struct {
Oldname, Newname string
}
func (f OldnameNewnameFile) Name() string {
return f.Newname
}
func (f OldnameNewnameFile) String() string {
var sb strings.Builder
sb.WriteString("old:")
sb.WriteString(f.Oldname)
sb.WriteString(" ->new:")
sb.WriteString(f.Newname)
return sb.String()
}
type PathnameFile struct {
Pathname string
}
func (f PathnameFile) Name() string {
return f.Pathname
}
func (f PathnameFile) String() string {
var sb strings.Builder
sb.WriteString("pathname:")
sb.WriteString(f.Pathname)
return sb.String()
}
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