Mansuri, Wasim (NSN - IN/Bangalore) wrote: > My question here is, > Am I using poll() properly? > can we use poll to read the files like I am reading? > If we can not use poll than is there any other way using which I can > get to know if there is some data in the file after I did last read()?
I'm not sure if poll can be used in this way. poll() is answering your question about "can I read?" and saying yes, which apparently means "you have an end-of-file to read". poll() is used to avoid blocking on sockets and pipes, and, guess what, your read() is not blocking, so poll() was right to suggest you to read. :-) You can use the offset returned by lseek() to make a comparison with your last read offset, but it will be a busy loop (hopefully with some delay) and not a "wake me up" method. Not so different than just looping on read(), actually. :-/ Why don't you try checking how "tail -f" is implemented? There is an "interval" parameter, so I'm afraid it is looping.... A simple strace could be enough, probably easier than reading the source. -- Roberto Ragusa mail at robertoragusa.it -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
