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Viewing changes to mysys/my_write.c

  • Committer: Brian Aker
  • Date: 2008-07-03 00:14:39 UTC
  • Revision ID: brian@tangent.org-20080703001439-pit0mcl0wk8elxlq
Cleanup of sql-common and mysqldump

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mysys/my_write.c
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   along with this program; if not, write to the Free Software
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   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
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#include "config.h"
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#include "drizzled/internal/my_sys.h"
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#include "drizzled/internal/thread_var.h"
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#include "drizzled/error.h"
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#include <cerrno>
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namespace drizzled
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{
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namespace internal
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{
 
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#include "mysys_priv.h"
 
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#include "mysys_err.h"
 
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#include <errno.h>
 
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        /* Write a chunk of bytes to a file */
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size_t my_write(int Filedes, const unsigned char *Buffer, size_t Count, myf MyFlags)
 
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size_t my_write(int Filedes, const uchar *Buffer, size_t Count, myf MyFlags)
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{
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  size_t writenbytes, written;
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  uint32_t errors;
 
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  uint errors;
 
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  DBUG_ENTER("my_write");
 
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  DBUG_PRINT("my",("Fd: %d  Buffer: 0x%lx  Count: %lu  MyFlags: %d",
 
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                   Filedes, (long) Buffer, (ulong) Count, MyFlags));
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  errors=0; written=0;
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  /* The behavior of write(fd, buf, 0) is not portable */
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  if (unlikely(!Count))
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    return(0);
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    DBUG_RETURN(0);
 
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  for (;;)
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  {
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    if ((writenbytes= write(Filedes, Buffer, Count)) == Count)
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      Buffer+=writenbytes;
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      Count-=writenbytes;
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    }
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    errno=errno;
 
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    my_errno=errno;
 
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    DBUG_PRINT("error",("Write only %ld bytes, error: %d",
 
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                        (long) writenbytes, my_errno));
 
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#ifndef NO_BACKGROUND
 
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    if (my_thread_var->abort)
 
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      MyFlags&= ~ MY_WAIT_IF_FULL;              /* End if aborted by user */
 
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    if ((my_errno == ENOSPC || my_errno == EDQUOT) &&
 
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        (MyFlags & MY_WAIT_IF_FULL))
 
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    {
 
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      if (!(errors++ % MY_WAIT_GIVE_USER_A_MESSAGE))
 
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        my_error(EE_DISK_FULL,MYF(ME_BELL | ME_NOREFRESH),
 
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                 my_filename(Filedes),my_errno,MY_WAIT_FOR_USER_TO_FIX_PANIC);
 
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      VOID(sleep(MY_WAIT_FOR_USER_TO_FIX_PANIC));
 
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      continue;
 
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    }
 
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    if ((writenbytes == 0 || writenbytes == (size_t) -1))
 
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    {
 
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      if (my_errno == EINTR)
 
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      {
 
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        DBUG_PRINT("debug", ("my_write() was interrupted and returned %ld",
 
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                             (long) writenbytes));
 
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        continue;                               /* Interrupted */
 
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      }
 
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      if (!writenbytes && !errors++)            /* Retry once */
 
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      {
 
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        /* We may come here if the file quota is exeeded */
 
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        errno=EFBIG;                            /* Assume this is the error */
 
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        continue;
 
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      }
 
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    }
 
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    else
 
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      continue;                                 /* Retry */
 
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#endif
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    if (MyFlags & (MY_NABP | MY_FNABP))
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    {
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      if (MyFlags & (MY_WME | MY_FAE | MY_FNABP))
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      {
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        my_error(EE_WRITE, MYF(ME_BELL+ME_WAITTANG),
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                 "unknown", errno);
 
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                 my_filename(Filedes),my_errno);
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      }
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      return(MY_FILE_ERROR);            /* Error on read */
 
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      DBUG_RETURN(MY_FILE_ERROR);               /* Error on read */
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    }
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    else
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      break;                                    /* Return bytes written */
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  }
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  if (MyFlags & (MY_NABP | MY_FNABP))
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    return(0);                  /* Want only errors */
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  return(writenbytes+written);
 
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    DBUG_RETURN(0);                     /* Want only errors */
 
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  DBUG_RETURN(writenbytes+written);
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} /* my_write */
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} /* namespace internal */
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} /* namespace drizzled */