mirror of
https://github.com/MariaDB/server.git
synced 2025-01-18 04:53:01 +01:00
2c4fa340cc
Fixed bugs in my last changeset that made MySQL hard to compile. Added mutex around some data that could cause table cache corruptions when using OPTIMIZE TABLE / REPAIR TABLE or automatic repair of MyISAM tables. Added mutex around some data in the slave start/stop code that could cause THD linked list corruptions Extended my_chsize() to allow one to specify a filler character. Extend vio_blocking to return the old state (This made some usage of this function much simpler) Added testing for some functions that they caller have got the required mutexes before calling the function. Use setrlimit() to ensure that we can write core file if one specifies --core-file. Added --slave-compressed-protocol Made 2 the minimum length for ft_min_word_len Added variables foreign_key_checks & unique_checks. Less logging from replication code (if not started with --log-warnings) Changed that SHOW INNODB STATUS requre the SUPER privilege More DBUG statements and a lot of new code comments
103 lines
2.9 KiB
C
103 lines
2.9 KiB
C
/* 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; either version 2 of the License, or
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(at your option) any later version.
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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 "m_string.h"
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/*
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Change size of file.
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SYNOPSIS
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my_chsize()
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fd File descriptor
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new_length New file size
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filler If we don't have truncate, fill up all bytes after
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new_length with this character
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MyFlags Flags
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DESCRIPTION
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my_chsize() truncates file if shorter, else fill with the filler character
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RETURN VALUE
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0 Ok
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1 Error
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*/
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int my_chsize(File fd, my_off_t newlength, int filler, myf MyFlags)
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{
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DBUG_ENTER("my_chsize");
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DBUG_PRINT("my",("fd: %d length: %lu MyFlags: %d",fd,(ulong) newlength,
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MyFlags));
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#ifdef HAVE_CHSIZE
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if (chsize(fd,(off_t) newlength))
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{
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DBUG_PRINT("error",("errno: %d",errno));
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my_errno=errno;
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if (MyFlags & MY_WME)
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my_error(EE_CANT_CHSIZE,MYF(ME_BELL+ME_WAITTANG),errno);
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DBUG_RETURN(1);
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}
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DBUG_RETURN(0);
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#else
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/* if file is shorter, expand with null, else fill unused part with null */
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{
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my_off_t oldsize;
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char buff[IO_SIZE];
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oldsize = my_seek(fd, 0L, MY_SEEK_END, MYF(MY_WME+MY_FAE));
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DBUG_PRINT("info",("old_size: %ld", (ulong) oldsize));
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#ifdef HAVE_FTRUNCATE
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if (oldsize > newlength)
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{
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if (ftruncate(fd, (off_t) newlength))
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{
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my_errno=errno;
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DBUG_PRINT("error",("errno: %d",errno));
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if (MyFlags & MY_WME)
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my_error(EE_CANT_CHSIZE, MYF(ME_BELL+ME_WAITTANG), errno);
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DBUG_RETURN(1);
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}
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DBUG_RETURN(0);
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}
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#else
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if (oldsize > newlength)
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{ /* Fill diff with null */
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VOID(my_seek(fd, newlength, MY_SEEK_SET, MYF(MY_WME+MY_FAE)));
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swap(my_off_t, newlength, oldsize);
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}
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#endif
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/* Full file with 0 until it's as big as requested */
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bfill(buff, IO_SIZE, filler);
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while (newlength-oldsize > IO_SIZE)
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{
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if (my_write(fd,(byte*) buff,IO_SIZE,MYF(MY_NABP)))
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goto err;
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oldsize+= IO_SIZE;
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}
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if (my_write(fd,(byte*) buff,(uint) (newlength-oldsize),MYF(MY_NABP)))
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goto err;
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DBUG_RETURN(0);
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err:
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if (MyFlags & MY_WME)
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my_error(EE_CANT_CHSIZE,MYF(ME_BELL+ME_WAITTANG),my_errno);
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DBUG_PRINT("error",("errno: %d",my_errno));
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DBUG_RETURN(1);
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}
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#endif
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} /* my_chsize */
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