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SubjectOut of ptys
More info on 'out of ptys' error when logging in on the network.
I made a 'service' that runs `strace in.telnetd`. Here is a
heavily-edited script of the session...

Script started on Mon Aug 17 10:27:52 1998
# telnet quark 12345
Trying 204.178.40.236...
Connected to quark.analogic.com.
Escape character is '^]'.
[SNIPPED shared library stuff]
setsockopt(0, SOL_SOCKET, SO_KEEPALIVE, [1], 4) = 0
stat("/dev/ptyp0", {st_mode=S_IFCHR|0666, st_rdev=makedev(2, 0), ...}) = 0
open("/dev/ptyp0", O_RDWR) = -1 EIO (I/O error)
open("/dev/ptyp1", O_RDWR) = -1 EIO (I/O error)
open("/dev/ptyp2", O_RDWR) = 3
brk(0x8011000) = 0x8011000
[Okay, we got a pty]

[SNIPPED socket stuff]
write(0, "\377\375\30\377\375 \377\375#\377"..., 12) = 12
read(0, "\377\373\30\377\373 \377\373#\377"..., 1024) = 12
write(0, "\377\372 \1\377\360\377\372#\1\377"..., 24) = 24
read(0, "\377\372 \00038400,38400\377\360"..., 1024) = 110
ioctl(3, TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(3, TCSETS, {B9600 opost isig icanon echo ...}) = 0
brk(0x8012000) = 0x8012000
brk(0x8013000) = 0x8013000
open("/usr/lib/terminfo/v/vt100-am", O_RDONLY) = 4
read(4, "\32\1,\0\25\0\7\0\16\1\363\1", 12) = 12
brk(0x8014000) = 0x8014000
read(4, "vt100|vt100-am|dec vt100 (w/adva"..., 44) = 44
brk(0x8015000) = 0x8015000
read(4, "\0\1\0\0\1\0\0\0\0\0\0\0\0\1\1\0"..., 21) = 21
read(4, "\0", 1) = 1
read(4, "P\0\10\0\30\0\377\377\377\377\377"..., 14) = 14
read(4, "\377\377\0\0\2\0\4\0\25\0\32\0&\0"..., 540) = 540
read(4, "\7\0\r\0\33[%i%p1%d;%p2%dr\0\33["..., 499) = 499
close(4) = 0

ioctl(1, TCGETS, 0xbffff1dc) = -1 EINVAL (Invalid argument)
ioctl(2, TCGETS, 0xbffff1d0) = -1 EINVAL (Invalid argument)
These are invalid because the first 2 opens failed. We don't have
fds 1 and 2, only 0 and 3. (3 was the pty).

brk(0x8016000) = 0x8016000
fork() = 264
sigaction(SIGHUP, {SIG_IGN}, {SIG_DFL}) = 0
ioctl(3, TCGETS, {B9600 opost isig icanon echo ...}) = 0
write(0, "\377\373\3\377\375\1\377\375\37\377"..., 15) = 15
read(0, "\377\375\3\377\374\1\377\373\37\377"..., 1024) = 24
ioctl(3, TCGETS, {B9600 opost isig icanon echo ...}) = 0
ioctl(3, TIOCSWINSZ, {ws_row=25, ws_col=80, ws_xpixel=33, ws_ypixel=0}) = 0
ioctl(3, TIOCPKT, [1]) = 0
ioctl(0, FIONBIO, [1]) = 0
ioctl(3, FIONBIO, [1]) = 0
setsockopt(0, SOL_SOCKET, SO_OOBINLINE, [1], 4) = 0
sigaction(SIGTSTP, {SIG_IGN}, {SIG_DFL}) = 0
sigaction(SIGTTOU, {SIG_IGN}, {SIG_DFL}) = 0
sigaction(SIGCHLD, {0x8004660, [], SA_RESTART}, {SIG_DFL}) = 0
open("/dev/tty", O_RDWR) = -1 ENXIO (No such device or address)

This exists and should succeed:

File: "tty"
Size: 0 Filetype: Character Device
Mode: (0666/crw-rw-rw-) Uid: ( 0/ root) Gid: ( 5/ tty)
Device: 8,1 Inode: 6756 Links: 1 Device type: 5,0
Access: Mon Aug 17 10:44:32 1998(00000.00:01:06)
Modify: Fri Aug 14 18:04:49 1998(00002.16:40:49)
Change: Fri Aug 14 18:04:49 1998(00002.16:40:49)
Cheers,
Dick Johnson
***** FILE SYSTEM WAS MODIFIED *****
Penguin : Linux version 2.1.115 on an i586 machine (66.15 BogoMips).
Warning : It's hard to remain at the trailing edge of technology.

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