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c753f496a6
Docs/manual.texi: More information about INSERT DELAYED client/mysqltest.c: Added syntax -- error # mysql-test/mysql-test-run.sh: Don't stop server that isn't started mysql-test/t/bdb.test: Change to use -- error # mysys/my_chsize.c: Fix for last commit sql/field.cc: Fix for purify and opt_range.cc sql/ha_berkeley.cc: Purecoverage hints
88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library 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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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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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/* Change size of file. Truncate file if shorter, */
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/* else expand with zero. */
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int my_chsize(File fd, my_off_t newlength, 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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bzero(buff,IO_SIZE);
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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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