2ffc1ec6ca
isofs while the df command itself used the name iso9660fs or
cdfs. Both of these were inconsistent with the name cd9660 which
is used by the mount command. I modified df to recognize all of
the names cd9660, cdfs, isofs, and iso9660fs, and take them all
to refer to the same thing. Naturally I added a note of this
behaviour in the manual page too.
Submitted-By: Jukka Ukkonen <jau@jau.csc.fi>
430 lines
11 KiB
C
430 lines
11 KiB
C
/*
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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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* $Id: df.c,v 1.8 1996/01/14 18:55:09 bde Exp $
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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 8.7 (Berkeley) 4/2/94";
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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 <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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/* XXX assumes MOUNT_MAXTYPE < 32 */
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#define MT(m) (1 << (m))
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/* fixed values */
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#define MT_NONE (0)
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#define MT_ALL (MT(MOUNT_MAXTYPE+1)-1)
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/* subject to change */
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#define MT_LOCAL \
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(MT(MOUNT_UFS)|MT(MOUNT_MFS)|MT(MOUNT_LFS)|MT(MOUNT_MSDOS)|MT(MOUNT_CD9660))
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#define MT_DEFAULT MT_ALL
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struct typetab {
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char *str;
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long types;
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} typetab[] = {
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{"ufs", MT(MOUNT_UFS)},
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{"local", MT_LOCAL},
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{"all", MT_ALL},
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{"nfs", MT(MOUNT_NFS)},
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{"mfs", MT(MOUNT_MFS)},
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{"lfs", MT(MOUNT_LFS)},
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{"msdos", MT(MOUNT_MSDOS)},
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{"fdesc", MT(MOUNT_FDESC)},
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{"portal", MT(MOUNT_PORTAL)},
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#if 0
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/* return fsid of underlying FS */
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{"lofs", MT(MOUNT_LOFS)},
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{"null", MT(MOUNT_NULL)},
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{"umap", MT(MOUNT_UMAP)},
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#endif
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{"kernfs", MT(MOUNT_KERNFS)},
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{"procfs", MT(MOUNT_PROCFS)},
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{"afs", MT(MOUNT_AFS)},
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{"iso9660fs", MT(MOUNT_CD9660)},
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{"isofs", MT(MOUNT_CD9660)},
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{"cd9660", MT(MOUNT_CD9660)},
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{"cdfs", MT(MOUNT_CD9660)},
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{"misc", MT(MOUNT_LOFS)|MT(MOUNT_FDESC)|MT(MOUNT_PORTAL)|
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MT(MOUNT_KERNFS)|MT(MOUNT_PROCFS)},
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{NULL, 0}
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};
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long addtype __P((long, char *));
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long regetmntinfo __P((struct statfs **, long, long));
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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, tflag;
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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 fsmask, mntsize;
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int ch, err, i, maxwidth, width;
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char *mntpt;
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iflag = nflag = tflag = 0;
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fsmask = MT_NONE;
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while ((ch = getopt(argc, argv, "iknt:")) != 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 'k':
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putenv("BLOCKSIZE=1k");
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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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fsmask = addtype(fsmask, optarg);
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tflag = 1;
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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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if (!tflag)
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fsmask = MT_DEFAULT;
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mntsize = regetmntinfo(&mntbuf, mntsize, fsmask);
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if (fsmask != MT_ALL) {
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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(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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long
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addtype(omask, str)
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long omask;
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char *str;
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{
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struct typetab *tp;
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/*
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* If it is one of our known types, add it to the current mask
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*/
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for (tp = typetab; tp->str; tp++)
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if (strcmp(str, tp->str) == 0)
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return (tp->types | (tflag ? omask : MT_NONE));
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/*
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* See if it is the negation of one of the known values
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*/
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if (strlen(str) > 2 && str[0] == 'n' && str[1] == 'o')
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for (tp = typetab; tp->str; tp++)
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if (strcmp(str+2, tp->str) == 0)
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return (~tp->types & (tflag ? omask : MT_ALL));
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errx(1, "unknown type `%s'", str);
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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 ``fsmask'' 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, fsmask)
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struct statfs **mntbufp;
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long mntsize, fsmask;
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{
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int i, j;
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struct statfs *mntbuf;
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if (fsmask == MT_ALL)
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return (nflag ? mntsize : getmntinfo(mntbufp, MNT_WAIT));
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mntbuf = *mntbufp;
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j = 0;
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for (i = 0; i < mntsize; i++) {
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if (fsmask & MT(mntbuf[i].f_type)) {
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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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}
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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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}
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/*
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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/ffs/fs.h>
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#include <errno.h>
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#include <fstab.h>
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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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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;
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char *mntpt;
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static int synced;
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if (synced++ == 0)
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sync();
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if ((rfd = open(file, O_RDONLY)) < 0) {
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warn("%s", file);
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return;
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}
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if (bread((off_t)SBOFF, &sblock, SBSIZE) == 0) {
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(void)close(rfd);
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return;
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}
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sfsp = &statfsbuf;
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sfsp->f_type = MOUNT_UFS;
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sfsp->f_flags = 0;
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sfsp->f_bsize = sblock.fs_fsize;
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sfsp->f_iosize = sblock.fs_bsize;
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sfsp->f_blocks = sblock.fs_dsize;
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sfsp->f_bfree = sblock.fs_cstotal.cs_nbfree * sblock.fs_frag +
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sblock.fs_cstotal.cs_nffree;
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sfsp->f_bavail = freespace(&sblock, sblock.fs_minfree);
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sfsp->f_files = sblock.fs_ncg * sblock.fs_ipg;
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sfsp->f_ffree = sblock.fs_cstotal.cs_nifree;
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sfsp->f_fsid.val[0] = 0;
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sfsp->f_fsid.val[1] = 0;
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if ((mntpt = getmntpt(file)) == 0)
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mntpt = "";
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memmove(&sfsp->f_mntonname[0], mntpt, MNAMELEN);
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memmove(&sfsp->f_mntfromname[0], file, MNAMELEN);
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prtstat(sfsp, maxwidth);
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(void)close(rfd);
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}
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int
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bread(off, buf, cnt)
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off_t off;
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void *buf;
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int cnt;
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{
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int nr;
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(void)lseek(rfd, off, SEEK_SET);
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if ((nr = read(rfd, buf, cnt)) != cnt) {
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/* Probably a dismounted disk if errno == EIO. */
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if (errno != EIO)
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(void)fprintf(stderr, "\ndf: %qd: %s\n",
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off, strerror(nr > 0 ? EIO : errno));
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return (0);
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}
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return (1);
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}
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void
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usage()
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{
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fprintf(stderr,
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"usage: df [-ikn] [-t fstype] [file | file_system ...]\n");
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exit(1);
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}
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