unveil
if (Cflag && unveil(Cflag, "r") == -1)
if (unveil(Rflag, "r") == -1)
if (Kflag && unveil(Kflag, "r") == -1)
if (oflag && unveil(oflag, "r") == -1)
if (unveil(host, "rwc") == -1)
if (unveil(sflag, "rwc") == -1)
if (unveil("/tmp", "rwc") == -1)
if (unveil("/", "") == -1)