stty -a

stty-a.txt

speed 38400 baud; rows 24; columns 80; line = 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;
eol2 = <undef>; swtch = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R;
werase = ^W; lnext = ^V; flush = ^O; min = 1; time = 0;
-parenb -parodd -cmspar cs8 -hupcl -cstopb cread -clocal -crtscts
-ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl ixon -ixoff
-iuclc -ixany -imaxbel iutf8
opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0
isig icanon iexten echo echoe echok -echonl -noflsh -xcase -tostop -echoprt
echoctl echoke

$ xrdb -query |grep -i xterm
Aterm*termName: xtermc
XTerm*allowColorOps:    true
XTerm.VT100.Scrollbar.Translations:     #override \n <Btn5Down>: StartScroll(Forward) \n <Btn4Down>: StartScroll(Backword) \n

xterm systemcall trace:
read(6, "\33]11;?\7", 4096)             = 7
read(6, 0xc2fcec, 4096)                 = -1 EAGAIN (Resource temporarily unavailable)
recvmsg(3, 0x7fff0c24aa70, 0)           = -1 EAGAIN (Resource temporarily unavailable)
recvmsg(3, 0x7fff0c24a870, 0)           = -1 EAGAIN (Resource temporarily unavailable)
recvmsg(3, 0x7fff0c24a870, 0)           = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN|POLLPRI|POLLRDNORM|POLLRDBAND}], 2, 0) = 0 (Timeout)
select(7, [3 4 6], [], NULL, NULL <detached ...>