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//go:build unix
package eval
import (
"os"
"os/signal"
"syscall"
"src.elv.sh/pkg/sys"
"src.elv.sh/pkg/sys/eunix"
)
// Process control functions in Unix.
func putSelfInFg() error {
if !sys.IsATTY(os.Stdin.Fd()) {
return nil
}
// If Elvish is in the background, the tcsetpgrp call below will either fail
// (if the process is in an orphaned process group) or stop the process.
// Ignoring TTOU fixes that.
signal.Ignore(syscall.SIGTTOU)
defer signal.Reset(syscall.SIGTTOU)
return eunix.Tcsetpgrp(0, syscall.Getpgrp())
}
func makeSysProcAttr(bg bool) *syscall.SysProcAttr {
return &syscall.SysProcAttr{Setpgid: bg}
}
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