busybox/libbb/copy_file_chunk.c

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/* vi: set sw=4 ts=4: */
/*
* Utility routines.
*
* Copyright (C) tons of folks. Tracking down who wrote what
* isn't something I'm going to worry about... If you wrote something
* here, please feel free to acknowledge your work.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Based in part on code from sash, Copyright (c) 1999 by David I. Bell
* Permission has been granted to redistribute this code under the GPL.
*
*/
#include <stdio.h>
#include <sys/stat.h>
#include "libbb.h"
/*
* Copy chunksize bytes between two file descriptors
*/
int copy_file_chunk(int srcfd, int dstfd, off_t chunksize)
{
off_t size;
char buffer[BUFSIZ]; /* BUFSIZ is declared in stdio.h */
while (chunksize > 0) {
if (chunksize > BUFSIZ)
size = BUFSIZ;
else
size = chunksize;
if (full_write(dstfd, buffer, full_read(srcfd, buffer, size)) < size)
return(FALSE);
chunksize -= size;
}
return (TRUE);
}
/* END CODE */
/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/