Attempt to import Lite2's df.
This commit is contained in:
Bruce Evans
parent
ec0b206f7c
commit
faa69d1a80
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@ -0,0 +1,12 @@
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# @(#)Makefile 8.3 (Berkeley) 5/8/95
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PROG= df
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SRCS= df.c vfslist.c
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BINGRP= operator
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BINMODE=2555
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MOUNT= ${.CURDIR}/../../sbin/mount
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CFLAGS+= -I${MOUNT}
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.PATH: ${MOUNT}
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.include <bsd.prog.mk>
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@ -0,0 +1,126 @@
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.\" Copyright (c) 1989, 1990, 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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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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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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.\" @(#)df.1 8.3 (Berkeley) 5/8/95
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.\"
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.Dd May 8, 1995
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.Dt DF 1
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.Os BSD 4
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.Sh NAME
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.Nm df
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.Nd display free disk space
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.Sh SYNOPSIS
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.Nm df
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.Op Fl in
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.Op Fl t Ar type
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.Op Ar file | Ar filesystem ...
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.Sh DESCRIPTION
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.Nm Df
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displays statistics about the amount of free disk space on the specified
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.Ar filesystem
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or on the filesystem of which
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.Ar file
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is a part.
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Values are displayed in 512-byte per block block counts.
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If neither a file or a filesystem operand is specified,
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statistics for all mounted filesystems are displayed
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(subject to the
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.Fl t
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option below).
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.Pp
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The following options are available:
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.Bl -tag -width Ds
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.It Fl i
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Include statistics on the number of free inodes.
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.It Fl n
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Print out the previously obtained statistics from the filesystems.
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This option should be used if it is possible that one or more
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filesystems are in a state such that they will not be able to provide
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statistics without a long delay.
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When this option is specified,
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.Nm df
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will not request new statistics from the filesystems, but will respond
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with the possibly stale statistics that were previously obtained.
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.It Fl t
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Only print out statistics for filesystems of the specified types.
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More than one type may be specified in a comma separated list.
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The list of filesystem types can be prefixed with
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.Dq no
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to specify the filesystem types for which action should
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.Em not
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be taken.
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For example, the
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.Nm df
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command:
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.Bd -literal -offset indent
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df -t nonfs,mfs
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.Ed
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.Pp
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lists all filesystems except those of type
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.Tn NFS
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and
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.Tn MFS .
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The
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.Xr sysctl 8
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command can be used to find out the types of filesystems
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that are available on the system:
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.Bd -literal -offset indent
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sysctl vfs
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.Ed
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.El
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.Sh ENVIRONMENTAL VARIABLES
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.Bl -tag -width BLOCKSIZE
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.It Ev BLOCKSIZE
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If the environmental variable
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.Ev BLOCKSIZE
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is set, the block counts will be displayed in units of that size block.
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.El
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.Sh BUGS
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The
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.Fl n
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and
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.Fl t
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flags are ignored if a file or filesystem is specified.
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.Sh SEE ALSO
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.Xr quota 1 ,
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.Xr statfs 2 ,
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.Xr fstatfs 2 ,
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.Xr getfsstat 2 ,
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.Xr getmntinfo 3 ,
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.Xr fstab 5 ,
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.Xr mount 8 ,
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.Xr quot 8 ,
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.Xr sysctl 8
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.Sh HISTORY
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A
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.Nm df
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command appeared in
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.At v6 .
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@ -0,0 +1,361 @@
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/*
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* Copyright (c) 1980, 1990, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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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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#ifndef lint
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static char copyright[] =
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"@(#) Copyright (c) 1980, 1990, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)df.c 8.9 (Berkeley) 5/8/95";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/mount.h>
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#include <ufs/ufs/ufsmount.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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int checkvfsname __P((const char *, char **));
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char **makevfslist __P((char *));
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long regetmntinfo __P((struct statfs **, long, char **));
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int bread __P((off_t, void *, int));
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char *getmntpt __P((char *));
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void prtstat __P((struct statfs *, int));
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void ufs_df __P((char *, int));
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void usage __P((void));
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int iflag, nflag;
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struct ufs_args mdev;
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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struct stat stbuf;
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struct statfs statfsbuf, *mntbuf;
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long mntsize;
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int ch, err, i, maxwidth, width;
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char *mntpt, **vfslist;
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vfslist = NULL;
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while ((ch = getopt(argc, argv, "int:")) != EOF)
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switch (ch) {
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case 'i':
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iflag = 1;
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break;
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case 'n':
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nflag = 1;
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break;
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case 't':
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if (vfslist != NULL)
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errx(1, "only one -t option may be specified.");
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vfslist = makevfslist(optarg);
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
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maxwidth = 0;
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for (i = 0; i < mntsize; i++) {
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width = strlen(mntbuf[i].f_mntfromname);
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if (width > maxwidth)
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maxwidth = width;
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}
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if (!*argv) {
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mntsize = regetmntinfo(&mntbuf, mntsize, vfslist);
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if (vfslist != NULL) {
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maxwidth = 0;
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for (i = 0; i < mntsize; i++) {
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width = strlen(mntbuf[i].f_mntfromname);
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if (width > maxwidth)
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maxwidth = width;
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}
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}
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for (i = 0; i < mntsize; i++)
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prtstat(&mntbuf[i], maxwidth);
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exit(0);
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}
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for (; *argv; argv++) {
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if (stat(*argv, &stbuf) < 0) {
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err = errno;
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if ((mntpt = getmntpt(*argv)) == 0) {
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warn("%s", *argv);
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continue;
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}
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} else if ((stbuf.st_mode & S_IFMT) == S_IFCHR) {
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ufs_df(*argv, maxwidth);
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continue;
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} else if ((stbuf.st_mode & S_IFMT) == S_IFBLK) {
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if ((mntpt = getmntpt(*argv)) == 0) {
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mntpt = mktemp(strdup("/tmp/df.XXXXXX"));
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mdev.fspec = *argv;
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if (mkdir(mntpt, DEFFILEMODE) != 0) {
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warn("%s", mntpt);
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continue;
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}
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if (mount("ufs", mntpt, MNT_RDONLY,
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&mdev) != 0) {
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ufs_df(*argv, maxwidth);
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(void)rmdir(mntpt);
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continue;
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} else if (statfs(mntpt, &statfsbuf)) {
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statfsbuf.f_mntonname[0] = '\0';
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prtstat(&statfsbuf, maxwidth);
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} else
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warn("%s", *argv);
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(void)unmount(mntpt, 0);
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(void)rmdir(mntpt);
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continue;
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}
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} else
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mntpt = *argv;
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/*
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* Statfs does not take a `wait' flag, so we cannot
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* implement nflag here.
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*/
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if (statfs(mntpt, &statfsbuf) < 0) {
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warn("%s", mntpt);
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continue;
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}
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if (argc == 1)
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maxwidth = strlen(statfsbuf.f_mntfromname) + 1;
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prtstat(&statfsbuf, maxwidth);
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}
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return (0);
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}
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char *
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getmntpt(name)
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char *name;
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{
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long mntsize, i;
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struct statfs *mntbuf;
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mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
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for (i = 0; i < mntsize; i++) {
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if (!strcmp(mntbuf[i].f_mntfromname, name))
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return (mntbuf[i].f_mntonname);
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}
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return (0);
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}
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/*
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* Make a pass over the filesystem info in ``mntbuf'' filtering out
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* filesystem types not in vfslist and possibly re-stating to get
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* current (not cached) info. Returns the new count of valid statfs bufs.
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*/
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long
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regetmntinfo(mntbufp, mntsize, vfslist)
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struct statfs **mntbufp;
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long mntsize;
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char **vfslist;
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{
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int i, j;
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struct statfs *mntbuf;
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if (vfslist == NULL)
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return (nflag ? mntsize : getmntinfo(mntbufp, MNT_WAIT));
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mntbuf = *mntbufp;
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for (j = 0, i = 0; i < mntsize; i++) {
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if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
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continue;
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if (!nflag)
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(void)statfs(mntbuf[i].f_mntonname,&mntbuf[j]);
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else if (i != j)
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mntbuf[j] = mntbuf[i];
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j++;
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}
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return (j);
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}
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/*
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* Convert statfs returned filesystem size into BLOCKSIZE units.
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* Attempts to avoid overflow for large filesystems.
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*/
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#define fsbtoblk(num, fsbs, bs) \
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(((fsbs) != 0 && (fsbs) < (bs)) ? \
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(num) / ((bs) / (fsbs)) : (num) * ((fsbs) / (bs)))
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/*
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* Print out status about a filesystem.
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*/
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void
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prtstat(sfsp, maxwidth)
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struct statfs *sfsp;
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int maxwidth;
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{
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static long blocksize;
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static int headerlen, timesthrough;
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static char *header;
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long used, availblks, inodes;
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if (maxwidth < 11)
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maxwidth = 11;
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if (++timesthrough == 1) {
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header = getbsize(&headerlen, &blocksize);
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(void)printf("%-*.*s %s Used Avail Capacity",
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maxwidth, maxwidth, "Filesystem", header);
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if (iflag)
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(void)printf(" iused ifree %%iused");
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(void)printf(" Mounted on\n");
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}
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(void)printf("%-*.*s", maxwidth, maxwidth, sfsp->f_mntfromname);
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used = sfsp->f_blocks - sfsp->f_bfree;
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availblks = sfsp->f_bavail + used;
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(void)printf(" %*ld %8ld %8ld", headerlen,
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fsbtoblk(sfsp->f_blocks, sfsp->f_bsize, blocksize),
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fsbtoblk(used, sfsp->f_bsize, blocksize),
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fsbtoblk(sfsp->f_bavail, sfsp->f_bsize, blocksize));
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(void)printf(" %5.0f%%",
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availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
|
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if (iflag) {
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inodes = sfsp->f_files;
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used = inodes - sfsp->f_ffree;
|
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(void)printf(" %7ld %7ld %5.0f%% ", used, sfsp->f_ffree,
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inodes == 0 ? 100.0 : (double)used / (double)inodes * 100.0);
|
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} else
|
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(void)printf(" ");
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(void)printf(" %s\n", sfsp->f_mntonname);
|
||||
}
|
||||
|
||||
/*
|
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* This code constitutes the pre-system call Berkeley df code for extracting
|
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* information from filesystem superblocks.
|
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*/
|
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#include <ufs/ufs/dinode.h>
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#include <ufs/ffs/fs.h>
|
||||
#include <errno.h>
|
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#include <fstab.h>
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|
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union {
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struct fs iu_fs;
|
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char dummy[SBSIZE];
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} sb;
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#define sblock sb.iu_fs
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|
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int rfd;
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void
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ufs_df(file, maxwidth)
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char *file;
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int maxwidth;
|
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{
|
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struct statfs statfsbuf;
|
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struct statfs *sfsp;
|
||||
char *mntpt;
|
||||
static int synced;
|
||||
|
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if (synced++ == 0)
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sync();
|
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|
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if ((rfd = open(file, O_RDONLY)) < 0) {
|
||||
warn("%s", file);
|
||||
return;
|
||||
}
|
||||
if (bread((off_t)SBOFF, &sblock, SBSIZE) == 0) {
|
||||
(void)close(rfd);
|
||||
return;
|
||||
}
|
||||
sfsp = &statfsbuf;
|
||||
sfsp->f_type = 1;
|
||||
strcpy(sfsp->f_fstypename, "ufs");
|
||||
sfsp->f_flags = 0;
|
||||
sfsp->f_bsize = sblock.fs_fsize;
|
||||
sfsp->f_iosize = sblock.fs_bsize;
|
||||
sfsp->f_blocks = sblock.fs_dsize;
|
||||
sfsp->f_bfree = sblock.fs_cstotal.cs_nbfree * sblock.fs_frag +
|
||||
sblock.fs_cstotal.cs_nffree;
|
||||
sfsp->f_bavail = (sblock.fs_dsize * (100 - sblock.fs_minfree) / 100) -
|
||||
(sblock.fs_dsize - sfsp->f_bfree);
|
||||
if (sfsp->f_bavail < 0)
|
||||
sfsp->f_bavail = 0;
|
||||
sfsp->f_files = sblock.fs_ncg * sblock.fs_ipg;
|
||||
sfsp->f_ffree = sblock.fs_cstotal.cs_nifree;
|
||||
sfsp->f_fsid.val[0] = 0;
|
||||
sfsp->f_fsid.val[1] = 0;
|
||||
if ((mntpt = getmntpt(file)) == 0)
|
||||
mntpt = "";
|
||||
memmove(&sfsp->f_mntonname[0], mntpt, MNAMELEN);
|
||||
memmove(&sfsp->f_mntfromname[0], file, MNAMELEN);
|
||||
prtstat(sfsp, maxwidth);
|
||||
(void)close(rfd);
|
||||
}
|
||||
|
||||
int
|
||||
bread(off, buf, cnt)
|
||||
off_t off;
|
||||
void *buf;
|
||||
int cnt;
|
||||
{
|
||||
int nr;
|
||||
|
||||
(void)lseek(rfd, off, SEEK_SET);
|
||||
if ((nr = read(rfd, buf, cnt)) != cnt) {
|
||||
/* Probably a dismounted disk if errno == EIO. */
|
||||
if (errno != EIO)
|
||||
(void)fprintf(stderr, "\ndf: %qd: %s\n",
|
||||
off, strerror(nr > 0 ? EIO : errno));
|
||||
return (0);
|
||||
}
|
||||
return (1);
|
||||
}
|
||||
|
||||
void
|
||||
usage()
|
||||
{
|
||||
(void)fprintf(stderr,
|
||||
"usage: df [-in] [-t type] [file | file_system ...]\n");
|
||||
exit(1);
|
||||
}
|
||||
Loading…
Reference in New Issue