49e5c8f314
- Make sure the mode argument is either a character or a block device. - Use S_IS*() instead of checking S_IF*-flags by hand. - Don't use kern.devname when the argument is already NODEV. - Always call snprintf with the proper amount of arguments corresponding with the format. - Perform some whitespace fixes. Tabs instead of 4 spaces, missing space for return statement. - Remove unneeded includes.
75 lines
2.4 KiB
C
75 lines
2.4 KiB
C
/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. 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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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)devname.c 8.2 (Berkeley) 4/29/95";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/sysctl.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/param.h>
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#include <sys/stat.h>
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char *
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devname_r(dev_t dev, mode_t type, char *buf, int len)
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{
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int i;
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size_t j;
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if (dev == NODEV || !(S_ISCHR(type) || S_ISBLK(dev))) {
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strlcpy(buf, "#NODEV", len);
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return (buf);
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}
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if (S_ISCHR(type)) {
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j = len;
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i = sysctlbyname("kern.devname", buf, &j, &dev, sizeof (dev));
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if (i == 0)
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return (buf);
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}
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/* Finally just format it */
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snprintf(buf, len, "#%c:%d:0x%x",
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S_ISCHR(type) ? 'C' : 'B', major(dev), minor(dev));
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return (buf);
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}
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char *
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devname(dev_t dev, mode_t type)
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{
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static char buf[SPECNAMELEN + 1];
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return (devname_r(dev, type, buf, sizeof(buf)));
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}
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