backcmd
backcmd->buf = memout.buf;
backcmd->nleft = memout.buf != NULL ?
backcmd->fd = pip[0];
backcmd->jp = jp;
evalcommand(n, flags, (struct backcmd *)NULL);
evalbackcmd(union node *n, struct backcmd *result)
evalcommand(union node *cmd, int flags, struct backcmd *backcmd)
static void evalcommand(union node *, int, struct backcmd *);
void evalbackcmd(union node *, struct backcmd *);
struct backcmd in;