Teresa Noviello wrote: > On 9/5/06, Teresa Noviello <[EMAIL PROTECTED]> wrote: >> >> On 9/5/06, Jan Kiszka <[EMAIL PROTECTED]> wrote: >> >> > Teresa Noviello wrote: >> > > Hi! I have modified rtt-sender.c and rtt-responder.c in the way you >> > see in >> > > attachments, i use them in two different shells with the two commands >> > (on >> > > the same machine): >> > > >> > > 1. ./rtt-sender -d 127.0.0.1 >> > > 2. ./rtt-responder -l 127.0.0.1 >> > > >> > > rtt-sender goes in Segmentation Fault and rtt-responder remains up. >> > What i >> > > do wrong? >> > > >> > > I see in debug messages that sendto_rt in transmitter function >> > doesnt't >> > > send >> > > anything! Why? >> > > the messages are: >> > > >> > > sendo failed - perror: Success. >> > >> > This is due to the fact that sendto_rt is not the POSIX variant, it's >> > the native real-time interface (and its obsolete, new naming scheme: >> > rt_dev_sendto). Only the wrapped POSIX sendto would set errno >> correctly, >> > but I'm not up-to-date with the RTAI status here. So, try to catch the >> > result of sendto_rt directly and print that one. >> >> >> >> The sendto_rt result is: 1 >> >> I have no idea of what does it mean. >> > > > Sorry, i made a mistake. > > The return value of send_to is "-9" and is not in the switch_errno error > list, because i call that function and i know that. >
What about using strerror()? :)
> What can i do with this number? where i have to search to understand
> what is
> it?
>
EBADF. That file descriptor is invalid. Do you close the socket
prematurely due to some other error? Check if the main loop is left too
early!
Jan
PS: Here is a tiny script called errno on my box that looks up error
codes (errno <no>) or to lists them all (when called without arguments):
#!/bin/sh
ERRNO_HEADERS="/usr/include/asm-generic/errno-base.h \
/usr/include/asm-generic/errno.h"
if [ "$1" == "" ]; then
ERR="[[:digit:]]+"
else
ERR=$1
fi
cat $ERRNO_HEADERS | grep -E "[[:space:]]$ERR[[:space:]]/"
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