fd.c

   1 #include "para.h"
   2 /**
   3  * check whether a file exists
   4  *
   5  * \param fn the file name
   6  *
   7  * \return Non-zero iff file exists.
   8  */
   9 int file_exists(const char *fn)
  10 {
  11         struct stat statbuf;
  12
  13         return !stat(fn, &statbuf);
  14 }
  15
  16 int para_select(int n, fd_set *readfds, fd_set *writefds,
  17                 struct timeval *timeout)
  18 {
  19         int ret, err;
  20         do {
  21                 ret = select(n, readfds, writefds, NULL, timeout);
  22                 err = errno;
  23         } while (ret < 0 && errno == EINTR);
  24         if (ret < 0)
  25                 PARA_CRIT_LOG("select error (%s)\n", strerror(err));
  26         return ret;
  27 }