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/*
* utility funcs
*
* Copyright 2005-2010 Gentoo Foundation
* Distributed under the terms of the GNU General Public License v2
* $Header: /var/cvsroot/gentoo-projects/portage-utils/libq/safe_io.c,v 1.3 2011/12/19 04:41:58 vapier Exp $
*/
#include <stdio.h>
size_t safe_fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream);
size_t safe_fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream)
{
size_t ret = 0, this_ret;
do {
this_ret = fwrite(ptr, size, nmemb, stream);
if (this_ret == nmemb)
return this_ret; /* most likely behavior */
if (this_ret == 0) {
if (feof(stream))
break;
if (ferror(stream)) {
if (errno == EAGAIN || errno == EINTR)
continue;
errp("fwrite(%p, %zu, %zu) failed (wrote %zu elements)",
ptr, size, nmemb, ret);
}
}
nmemb -= this_ret;
ret += this_ret;
ptr += (this_ret * size);
} while (nmemb);
return ret;
}
#define fwrite safe_fwrite
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