Commit 31d0c8bb8d92b29389088499d75d45a1462b145e
Committed by
Marc TITINGER
Marc TITINGER
1 parent
6e79b600
module: add udev rule, so tnt* device file has typical permission and group
Signed-off-by: Marc Titinger <marc.titinger@hotmail.fr>
Showing
4 changed files
with
25 additions
and
60 deletions
README deleted
| 1 | - | ||
| 2 | - | ||
| 3 | -tty0tty - linux null modem emulator v1.2 | ||
| 4 | - | ||
| 5 | - | ||
| 6 | -This is the tty0tty directory tree: | ||
| 7 | - | ||
| 8 | - module - linux kernel module null-modem | ||
| 9 | - pts - null-modem using ptys (without handshake lines) | ||
| 10 | - | ||
| 11 | - | ||
| 12 | -pts (unix98): | ||
| 13 | - | ||
| 14 | - When run connect two pseudo-ttys and show the connection names: | ||
| 15 | - | ||
| 16 | - (/dev/pts/1) <=> (/dev/pts/2) | ||
| 17 | - | ||
| 18 | - the connection is: | ||
| 19 | - | ||
| 20 | - TX -> RX | ||
| 21 | - RX <- TX | ||
| 22 | - | ||
| 23 | - | ||
| 24 | - | ||
| 25 | -module: | ||
| 26 | - | ||
| 27 | - The module is tested in kernel 3.10.2 (debian) | ||
| 28 | - | ||
| 29 | - When loaded, create 8 ttys interconnected: | ||
| 30 | - /dev/tnt0 <=> /dev/tnt1 | ||
| 31 | - /dev/tnt2 <=> /dev/tnt3 | ||
| 32 | - /dev/tnt4 <=> /dev/tnt5 | ||
| 33 | - /dev/tnt6 <=> /dev/tnt7 | ||
| 34 | - | ||
| 35 | - the connection is: | ||
| 36 | - | ||
| 37 | - TX -> RX | ||
| 38 | - RX <- TX | ||
| 39 | - RTS -> CTS | ||
| 40 | - CTS <- RTS | ||
| 41 | - DSR <- DTR | ||
| 42 | - CD <- DTR | ||
| 43 | - DTR -> DSR | ||
| 44 | - DTR -> CD | ||
| 45 | - | ||
| 46 | - | ||
| 47 | -Requirements: | ||
| 48 | - | ||
| 49 | - for module build is necessary kernel-headers or kernel source | ||
| 50 | - | ||
| 51 | - | ||
| 52 | -For e-mail suggestions : lcgamboa@yahoo.com |
README.md
| @@ -70,26 +70,37 @@ cd tty0tty-1.2/module | @@ -70,26 +70,37 @@ cd tty0tty-1.2/module | ||
| 70 | make | 70 | make |
| 71 | ``` | 71 | ``` |
| 72 | 72 | ||
| 73 | -Copy the new kernel module into the kernel modules directory | 73 | +Install the new kernel module into the kernel modules directory |
| 74 | 74 | ||
| 75 | ``` | 75 | ``` |
| 76 | -sudo cp tty0tty.ko /lib/modules/$(uname -r)/kernel/drivers/misc/ | 76 | +sudo make modules_install |
| 77 | ``` | 77 | ``` |
| 78 | 78 | ||
| 79 | -Load the module | 79 | +NOTE: if module signing is enabled, in order for depmop to complete, you may |
| 80 | +need to create file certs/x509.genkey in the kernel modules include directory | ||
| 81 | +and generate file signing_key.pem using openssl, guides are available online. | ||
| 82 | + | ||
| 83 | +Appropriate permissions are provided thanks to a udev rule located under: | ||
| 80 | 84 | ||
| 81 | ``` | 85 | ``` |
| 82 | -sudo depmod | ||
| 83 | -sudo modprobe tty0tty | 86 | +/etc/udev/rules.d/50-tty0tty.rules |
| 84 | ``` | 87 | ``` |
| 85 | 88 | ||
| 86 | -You should see new serial ports in ```/dev/``` (```ls /dev/tnt*```) | ||
| 87 | -Give appropriate permissions to the new serial ports | 89 | +NOTE: you need to add yourself to the dialout group (and do a full relog), with: |
| 88 | 90 | ||
| 89 | ``` | 91 | ``` |
| 90 | -sudo chmod 666 /dev/tnt* | 92 | +sudo usermod -a -G dialout ${USER} |
| 91 | ``` | 93 | ``` |
| 92 | 94 | ||
| 95 | +Load the module | ||
| 96 | + | ||
| 97 | +``` | ||
| 98 | +sudo udevadm control --reload-rules | ||
| 99 | +sudo depmod | ||
| 100 | +sudo modprobe tty0tty | ||
| 101 | +``` | ||
| 102 | + | ||
| 103 | +You should see new serial ports in ```/dev/``` (```ls /dev/tnt*```) | ||
| 93 | You can now access the serial ports as /dev/tnt0 (1,2,3,4 etc) Note that the consecutive ports are interconnected. For example, /dev/tnt0 and /dev/tnt1 are connected as if using a direct cable. | 104 | You can now access the serial ports as /dev/tnt0 (1,2,3,4 etc) Note that the consecutive ports are interconnected. For example, /dev/tnt0 and /dev/tnt1 are connected as if using a direct cable. |
| 94 | 105 | ||
| 95 | Persisting across boot: | 106 | Persisting across boot: |
module/50-tty0tty.rules
0 → 100644
module/Makefile