/
term_unix.go
60 lines (50 loc) · 1.11 KB
/
term_unix.go
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// +build darwin dragonfly freebsd linux netbsd openbsd
package term
import (
"os"
"os/exec"
"strconv"
"strings"
"github.com/Scalingo/heroku2scalingo/Godeps/_workspace/src/gopkg.in/errgo.v1"
)
// IsTerminal returns true if f is a terminal.
func IsTerminal(f *os.File) bool {
cmd := exec.Command("test", "-t", "0")
cmd.Stdin = f
return cmd.Run() == nil
}
func MakeRaw(f *os.File) error {
return stty(f, "-icanon", "-echo").Run()
}
func Restore(f *os.File) error {
return stty(f, "icanon", "echo").Run()
}
func Cols() (int, error) {
cols, err := tput("cols")
if err != nil {
return 0, errgo.Mask(err, errgo.Any)
}
return strconv.Atoi(cols)
}
func Lines() (int, error) {
cols, err := tput("lines")
if err != nil {
return 0, errgo.Mask(err, errgo.Any)
}
return strconv.Atoi(cols)
}
// helpers
func stty(f *os.File, args ...string) *exec.Cmd {
c := exec.Command("stty", args...)
c.Stdin = f
return c
}
func tput(what string) (string, error) {
c := exec.Command("tput", what)
c.Stderr = os.Stderr
out, err := c.Output()
if err != nil {
return "", err
}
return strings.TrimSpace(string(out)), nil
}