libvirt/src/util/files.c

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/*
* files.c: safer file handling
*
* Copyright (C) 2010-2011 Red Hat, Inc.
* Copyright (C) 2010 IBM Corporation
* Copyright (C) 2010 Stefan Berger
* Copyright (C) 2010 Eric Blake
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <config.h>
#include <unistd.h>
#include "files.h"
int virClose(int *fdptr, bool preserve_errno)
{
int saved_errno;
int rc = 0;
if (*fdptr >= 0) {
if (preserve_errno)
saved_errno = errno;
rc = close(*fdptr);
*fdptr = -1;
if (preserve_errno)
errno = saved_errno;
}
return rc;
}
int virFclose(FILE **file, bool preserve_errno)
{
int saved_errno;
int rc = 0;
if (*file) {
if (preserve_errno)
saved_errno = errno;
rc = fclose(*file);
*file = NULL;
if (preserve_errno)
errno = saved_errno;
}
return rc;
}
FILE *virFdopen(int *fdptr, const char *mode)
{
FILE *file = NULL;
if (*fdptr >= 0) {
file = fdopen(*fdptr, mode);
if (file)
*fdptr = -1;
} else {
errno = EBADF;
}
return file;
}