From: grahn+nntp@snipabacken.se   
      
   I got this question at work, and was a bit annoyed that I couldn't   
   easily find a straight answer in the man pages or in Stevens.   
      
   Under what conditions could write(sock, buf, n), with n>0, return zero   
   for a TCP socket?  According to POSIX?  In Linux?   
      
   The return values I'm comfortable with are:   
   n      - all got written   
   1..n-1 - partial write   
   -1     - fatal error, EINTR or EWOULDBLOCK   
      
   That doesn't seem to leave room for a distinct meaning of 0.   
      
   This supposedly happened to the guy who asked me, on Linux. I'm not   
   sure if the socket was set blocking or nonblocking.   
      
   /Jorgen   
      
   --   
     // Jorgen Grahn    O  o   .   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)