I'm trying to connect to GPRS network through a serial port connected GSM modem.
When I call /usr/sbin/pppd call <peer_name>
from the command line, it correctly receives and handles Ctrl+C from keyboard.
But when I put the exact same command in an empty shell script (with or without the shebang #!
at the top), chmod +x
it and run it from the shell prompt, then pppd
starts to run – But it totally ignores Ctrl+C key combination. Ctrl+Z works normally though.
This is the contents of the pppd
peer file
nodetach
dump
connect "connect_script"
disconnect "disconnect_script"
/dev/ttyS0
noauth
I tested another peer file which I had created to connect to a PPTP VPN server – with the same result. PPTP does not need a chat script, so I'm ruling out problems with chat
command or serial port link properties.
OS is debian 7.
Any ideas what is happening here?
Best Answer
I guess the problem is a bug specific to
pppd
version 2.4.5, which is the one that comes with Debian 7. I tested versions 2.4.4 and 2.4.6 (which is the latest as of now) on the same and other machines and they work as expected.pppd
package seems to have a lot of signal handler manipulation code in it, which I guess could lead to these kind of bugs. I'm just happy that it's been fixed by now.