Figured it out. I needed to increase the $SYSTEM_FD_MAX ($^F) before
opening the pipe. The default only passes system file descriptors to
exec()ed processes. Sorry for the trouble.
Thanks.
Richard
> Hi,
>
> I was working with the C example for the passwordfd.so plugin and got
> it to work with a dial up ppp connection but I really want to use this
> plugin with perl. So I am hoping that someone on this list has some
> experience using perl with passwordfd.
>
> I keep getting the error... "Can't read secret from fd". I've set up
> my script to fork and create a pipe to a READER file handle and a
> WRITER file handle. I write to the password to the WRITER FH (close
> the handle) and pass the file descriptor (fileno READER) to pppd in an
> exec(). The interaction with the modem works and the last message I
> get is Connect: ppp0 <--> /dev/ttyS0 before the error can't read from
> fd.
>
> Any help would be greatly appreciated.
>
> Thanks.
>
> Richard
>
> Here's the gist in code and the resulting OUTPUT:
>
> defined(my $pid = fork) or die "Can't fork: $!";
> if ($pid > 0) {
> pipe(PPPD_RDR, PPPD_WTR) || die "pipe failed: $!";
>
> PPPD_WTR->autoflush(1);
> close PPPD_WTR;
>
> my $fn = fileno PPPD_RDR;
>
> my $pppd_connect = "pppd call pwfd-test $device $flowcontrol user
> $username passwordfd $fn connect '$chatscript' $route" ;
>
> exec($pppd_connect) || die "can't exec program: $!";
> }
>
>
> OUTPUT
> Plugin passwordfd.so loaded.
>
> NO CARRIER
> ATZ
> OK
> ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
> OK
> ATDT912132706960
> CONNECT 9600/ARQ/V34/LAPM
>
> STATION ID - lsaca17rs05pr004,lsaca41ev
>
> Welcome
> Please Sign-on:Serial connection established.
> Using interface ppp0
> Connect: ppp0 <--> /dev/ttyS0
> Can't read secret from fd
> Can't read secret from fd
> Can't read secret from fd
> Can't read secret from fd
> CHAP authentication failed
> Modem hangup
> Connection terminated.
>
>
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J Richard Glass
richard@xxxxxxxxxxxxxxx
206.915.8046
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