a1fe87f061
would otherwise cause devclose() to free() the memory again. o Refactor devopen() so that it's more readable.
67 lines
2.1 KiB
C
67 lines
2.1 KiB
C
/*-
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* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <stand.h>
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#include <string.h>
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#include "bootstrap.h"
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int
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devopen(struct open_file *f, const char *fname, const char **file)
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{
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struct devdesc *dev;
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int result;
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result = archsw.arch_getdev((void **)&dev, fname, file);
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if (result)
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return (result);
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/* point to device-specific data so that device open can use it */
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f->f_devdata = dev;
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result = dev->d_dev->dv_open(f, dev);
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if (result != 0) {
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f->f_devdata = NULL;
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free(dev);
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return (result);
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}
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/* reference the devsw entry from the open_file structure */
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f->f_dev = dev->d_dev;
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return (0);
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}
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int
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devclose(struct open_file *f)
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{
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if (f->f_devdata != NULL) {
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free(f->f_devdata);
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}
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return(0);
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}
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