Question

I have a simple gateway listener which generates a log at the screen output via printf. I would like to record it so I can insert it in a mysql table.

printf("\nPacket received!! Decoding...");

I wonder if there is any fast way to do this is C.

In case there is, could I get both outputs at the same time?

Thanks

Answer 1

I’m not aware of any function that does output buffering in C. But you can simulate one easily like:

char buffer[MAX_BUFFER_SIZE] = ""; // that buffers your output.
char temp[SOME_SUITABLE_MAX];

now everytime you are using printf, use a sprintf as follows:

sprintf(temp,"\nPacket received!! Decoding...");

and them append this string to the buffer

strcat(buffer,temp);

keep doing the sprintf followed by strcat for every message you want to buffer and once done buffer will have the buffered output.