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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) {
// We need to use IoctlGetUint32 here, because pid_t is 32-bit even on
// 64-bit Linux. IoctlGetInt doesn't work on big-endian platforms:
// https://github.com/golang/go/issues/45585
// https://github.com/golang/go/issues/60429
pid, err := unix.IoctlGetUint32(int(fd), unix.TIOCGPGRP)
return int(pid) != unix.Getpgrp(), err
}
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