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by brian
clean slate |
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/* Copyright (C) 2000 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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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 "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 uchar *Buffer, size_t Count, myf MyFlags) |
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{
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size_t writenbytes, written; |
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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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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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break; |
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if (writenbytes != (size_t) -1) |
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{ /* Safeguard */ |
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written+=writenbytes; |
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Buffer+=writenbytes; |
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Count-=writenbytes; |
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}
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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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#ifdef THREAD
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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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#endif
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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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my_filename(Filedes),my_errno); |
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}
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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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DBUG_RETURN(0); /* Want only errors */ |
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DBUG_RETURN(writenbytes+written); |
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} /* my_write */ |