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//go:build !windows
package tui
import (
"os"
"syscall"
)
var devPrefixes = [...]string{"/dev/pts/", "/dev/"}
func ttyname() string {
var stderr syscall.Stat_t
if syscall.Fstat(2, &stderr) != nil {
return ""
}
for _, prefix := range devPrefixes {
files, err := os.ReadDir(prefix)
if err != nil {
continue
}
for _, file := range files {
info, err := file.Info()
if err != nil {
continue
}
if stat, ok := info.Sys().(*syscall.Stat_t); ok && stat.Rdev == stderr.Rdev {
return prefix + file.Name()
}
}
}
return ""
}
// TtyIn returns terminal device to be used as STDIN, falls back to os.Stdin
func TtyIn() *os.File {
in, err := os.OpenFile(consoleDevice, syscall.O_RDONLY, 0)
if err != nil {
tty := ttyname()
if len(tty) > 0 {
if in, err := os.OpenFile(tty, syscall.O_RDONLY, 0); err == nil {
return in
}
}
return os.Stdin
}
return in
}
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