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/* Copyright Abandoned 1996 TCX DataKonsult AB & Monty Program KB & Detron HB
This file is public domain and comes with NO WARRANTY of any kind */
#include "mysys_priv.h"
#include "mysys_err.h"
#include <errno.h>
/* Read a chunk of bytes from a file */
uint my_read(File Filedes, byte *Buffer, uint Count, myf MyFlags)
/* File descriptor */
/* Buffer must be at least count bytes */
/* Max number of bytes returnd */
/* Flags on what to do on error */
{
uint readbytes;
DBUG_ENTER("my_read");
DBUG_PRINT("my",("Fd: %d Buffer: %lx Count: %u MyFlags: %d",
Filedes, Buffer, Count, MyFlags));
for (;;)
{
errno=0; /* Linux doesn't reset this */
if ((readbytes = (uint) read(Filedes, Buffer, Count)) != Count)
{
my_errno=errno ? errno : -1;
DBUG_PRINT("warning",("Read only %ld bytes off %ld from %d, errno: %d",
readbytes,Count,Filedes,my_errno));
#ifdef THREAD
if (readbytes == 0 && errno == EINTR)
continue; /* Interrupted */
#endif
if (MyFlags & (MY_WME | MY_FAE | MY_FNABP))
{
if ((int) readbytes == -1)
my_error(EE_READ, MYF(ME_BELL+ME_WAITTANG),
my_filename(Filedes),my_errno);
else if (MyFlags & (MY_NABP | MY_FNABP))
my_error(EE_EOFERR, MYF(ME_BELL+ME_WAITTANG),
my_filename(Filedes),my_errno);
}
if ((int) readbytes == -1 || (MyFlags & (MY_FNABP | MY_NABP)))
DBUG_RETURN(MY_FILE_ERROR); /* Return with error */
}
if (MyFlags & (MY_NABP | MY_FNABP))
readbytes=0; /* Ok on read */
break;
}
DBUG_RETURN(readbytes);
} /* my_read */
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