mdw@git.distorted.org.uk Git - qmail/blob - timeoutread.c

   1 #include "timeoutread.h"
   2 #include "select.h"
   3 #include "error.h"
   4 #include "readwrite.h"
   5
   6 int timeoutread(t,fd,buf,len) int t; int fd; char *buf; int len;
   7 {
   8   fd_set rfds;
   9   struct timeval tv;
  10
  11   tv.tv_sec = t;
  12   tv.tv_usec = 0;
  13
  14   FD_ZERO(&rfds);
  15   FD_SET(fd,&rfds);
  16
  17   if (select(fd + 1,&rfds,(fd_set *) 0,(fd_set *) 0,&tv) == -1) return -1;
  18   if (FD_ISSET(fd,&rfds)) return read(fd,buf,len);
  19
  20   errno = error_timeout;
  21   return -1;
  22 }