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restic/internal/ui/termstatus/background_linux.go
greatroar f80b07b2c8 Fix IsProcessBackground on Linux with stdin redirection
The previous implementation assumed that stdin was a terminal.
It now checks the terminal's fd.
2020-10-13 13:12:02 +02:00

24 lines
620 B
Go

package termstatus
import (
"github.com/restic/restic/internal/debug"
"golang.org/x/sys/unix"
)
// IsProcessBackground reports whether the current process is running in the
// background. fd must be a file descriptor for the terminal.
func IsProcessBackground(fd uintptr) bool {
bg, err := isProcessBackground(fd)
if err != nil {
debug.Log("Can't check if we are in the background. Using default behaviour. Error: %s\n", err.Error())
return false
}
return bg
}
func isProcessBackground(fd uintptr) (bool, error) {
pid, err := unix.IoctlGetInt(int(fd), unix.TIOCGPGRP)
return pid != unix.Getpgrp(), err
}