Rework block count calculations to work correctly with small "block" sizes. MFC after: 14 days
637 lines
16 KiB
C
637 lines
16 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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* 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 0
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#ifndef lint
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static const 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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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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 <sys/sysctl.h>
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#include <ufs/ufs/ufsmount.h>
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#include <err.h>
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#include <libutil.h>
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#include <locale.h>
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#include <stdint.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 <sysexits.h>
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#include <unistd.h>
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#include "extern.h"
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#define UNITS_SI 1
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#define UNITS_2 2
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/* Maximum widths of various fields. */
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struct maxwidths {
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int mntfrom;
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int fstype;
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int total;
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int used;
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int avail;
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int iused;
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int ifree;
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};
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static void addstat(struct statfs *, struct statfs *);
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static char *getmntpt(const char *);
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static int int64width(int64_t);
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static char *makenetvfslist(void);
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static void prthuman(const struct statfs *, int64_t);
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static void prthumanval(int64_t);
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static intmax_t fsbtoblk(int64_t, uint64_t, u_long);
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static void prtstat(struct statfs *, struct maxwidths *);
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static size_t regetmntinfo(struct statfs **, long, const char **);
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static void update_maxwidths(struct maxwidths *, const struct statfs *);
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static void usage(void);
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static __inline int
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imax(int a, int b)
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{
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return (a > b ? a : b);
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}
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static int aflag = 0, cflag, hflag, iflag, kflag, lflag = 0, nflag, Tflag;
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static int thousands;
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static struct ufs_args mdev;
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int
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main(int argc, char *argv[])
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{
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struct stat stbuf;
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struct statfs statfsbuf, totalbuf;
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struct maxwidths maxwidths;
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struct statfs *mntbuf;
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const char *fstype;
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char *mntpath, *mntpt;
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const char **vfslist;
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int i, mntsize;
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int ch, rv;
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fstype = "ufs";
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(void)setlocale(LC_ALL, "");
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memset(&totalbuf, 0, sizeof(totalbuf));
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totalbuf.f_bsize = DEV_BSIZE;
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strlcpy(totalbuf.f_mntfromname, "total", MNAMELEN);
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vfslist = NULL;
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while ((ch = getopt(argc, argv, "abcgHhiklmnPt:T,")) != -1)
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switch (ch) {
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case 'a':
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aflag = 1;
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break;
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case 'b':
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/* FALLTHROUGH */
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case 'P':
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/*
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* POSIX specifically discusses the behavior of
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* both -k and -P. It states that the blocksize should
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* be set to 1024. Thus, if this occurs, simply break
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* rather than clobbering the old blocksize.
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*/
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if (kflag)
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break;
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setenv("BLOCKSIZE", "512", 1);
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hflag = 0;
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break;
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case 'c':
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cflag = 1;
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break;
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case 'g':
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setenv("BLOCKSIZE", "1g", 1);
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hflag = 0;
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break;
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case 'H':
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hflag = UNITS_SI;
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break;
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case 'h':
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hflag = UNITS_2;
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break;
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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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kflag++;
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setenv("BLOCKSIZE", "1024", 1);
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hflag = 0;
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break;
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case 'l':
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if (vfslist != NULL)
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errx(1, "-l and -t are mutually exclusive.");
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vfslist = makevfslist(makenetvfslist());
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lflag = 1;
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break;
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case 'm':
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setenv("BLOCKSIZE", "1m", 1);
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hflag = 0;
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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 (lflag)
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errx(1, "-l and -t are mutually exclusive.");
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if (vfslist != NULL)
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errx(1, "only one -t option may be specified");
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fstype = optarg;
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vfslist = makevfslist(optarg);
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break;
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case 'T':
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Tflag = 1;
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break;
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case ',':
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thousands = 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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rv = 0;
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if (!*argv) {
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/* everything (modulo -t) */
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mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
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mntsize = regetmntinfo(&mntbuf, mntsize, vfslist);
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} else {
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/* just the filesystems specified on the command line */
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mntbuf = malloc(argc * sizeof(*mntbuf));
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if (mntbuf == 0)
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err(1, "malloc()");
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mntsize = 0;
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/* continued in for loop below */
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}
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/* iterate through specified filesystems */
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for (; *argv; argv++) {
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if (stat(*argv, &stbuf) < 0) {
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if ((mntpt = getmntpt(*argv)) == 0) {
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warn("%s", *argv);
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rv = 1;
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continue;
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}
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} else if (S_ISCHR(stbuf.st_mode)) {
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if ((mntpt = getmntpt(*argv)) == 0) {
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mdev.fspec = *argv;
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mntpath = strdup("/tmp/df.XXXXXX");
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if (mntpath == NULL) {
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warn("strdup failed");
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rv = 1;
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continue;
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}
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mntpt = mkdtemp(mntpath);
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if (mntpt == NULL) {
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warn("mkdtemp(\"%s\") failed", mntpath);
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rv = 1;
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free(mntpath);
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continue;
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}
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if (mount(fstype, mntpt, MNT_RDONLY,
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&mdev) != 0) {
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warn("%s", *argv);
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rv = 1;
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(void)rmdir(mntpt);
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free(mntpath);
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continue;
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} else if (statfs(mntpt, &statfsbuf) == 0) {
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statfsbuf.f_mntonname[0] = '\0';
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prtstat(&statfsbuf, &maxwidths);
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if (cflag)
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addstat(&totalbuf, &statfsbuf);
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} else {
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warn("%s", *argv);
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rv = 1;
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}
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(void)unmount(mntpt, 0);
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(void)rmdir(mntpt);
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free(mntpath);
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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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rv = 1;
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continue;
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}
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/*
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* Check to make sure the arguments we've been given are
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* satisfied. Return an error if we have been asked to
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* list a mount point that does not match the other args
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* we've been given (-l, -t, etc.).
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*/
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if (checkvfsname(statfsbuf.f_fstypename, vfslist)) {
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rv = 1;
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continue;
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}
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/* the user asked for it, so ignore the ignore flag */
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statfsbuf.f_flags &= ~MNT_IGNORE;
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/* add to list */
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mntbuf[mntsize++] = statfsbuf;
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}
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bzero(&maxwidths, sizeof(maxwidths));
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for (i = 0; i < mntsize; i++) {
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if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0) {
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update_maxwidths(&maxwidths, &mntbuf[i]);
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if (cflag)
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addstat(&totalbuf, &mntbuf[i]);
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}
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}
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for (i = 0; i < mntsize; i++)
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if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0)
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prtstat(&mntbuf[i], &maxwidths);
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if (cflag)
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prtstat(&totalbuf, &maxwidths);
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return (rv);
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}
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static char *
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getmntpt(const char *name)
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{
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size_t 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 file system info in ``mntbuf'' filtering out
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* file system 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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static size_t
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regetmntinfo(struct statfs **mntbufp, long mntsize, const char **vfslist)
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{
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int error, 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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/*
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* XXX statfs(2) can fail for various reasons. It may be
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* possible that the user does not have access to the
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* pathname, if this happens, we will fall back on
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* "stale" filesystem statistics.
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*/
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error = statfs(mntbuf[i].f_mntonname, &mntbuf[j]);
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if (nflag || error < 0)
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if (i != j) {
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if (error < 0)
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warnx("%s stats possibly stale",
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mntbuf[i].f_mntonname);
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mntbuf[j] = mntbuf[i];
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}
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j++;
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}
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return (j);
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}
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static void
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prthuman(const struct statfs *sfsp, int64_t used)
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{
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prthumanval(sfsp->f_blocks * sfsp->f_bsize);
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prthumanval(used * sfsp->f_bsize);
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prthumanval(sfsp->f_bavail * sfsp->f_bsize);
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}
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static void
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prthumanval(int64_t bytes)
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{
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char buf[6];
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int flags;
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flags = HN_B | HN_NOSPACE | HN_DECIMAL;
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if (hflag == UNITS_SI)
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flags |= HN_DIVISOR_1000;
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humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1),
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bytes, "", HN_AUTOSCALE, flags);
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(void)printf(" %6s", buf);
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}
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/*
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* Print an inode count in "human-readable" format.
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*/
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static void
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prthumanvalinode(int64_t bytes)
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{
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char buf[6];
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int flags;
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flags = HN_NOSPACE | HN_DECIMAL | HN_DIVISOR_1000;
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humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1),
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bytes, "", HN_AUTOSCALE, flags);
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(void)printf(" %5s", buf);
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}
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/*
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* Convert statfs returned file system size into BLOCKSIZE units.
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*/
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static intmax_t
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fsbtoblk(int64_t num, uint64_t fsbs, u_long bs)
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{
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return (num * (intmax_t) fsbs / bs);
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}
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/*
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* Print out status about a file system.
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*/
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static void
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prtstat(struct statfs *sfsp, struct maxwidths *mwp)
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{
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static long blocksize;
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static int headerlen, timesthrough = 0;
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static const char *header;
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int64_t used, availblks, inodes;
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const char *format;
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if (++timesthrough == 1) {
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mwp->mntfrom = imax(mwp->mntfrom, (int)strlen("Filesystem"));
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mwp->fstype = imax(mwp->fstype, (int)strlen("Type"));
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if (thousands) { /* make space for commas */
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mwp->total += (mwp->total - 1) / 3;
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mwp->used += (mwp->used - 1) / 3;
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mwp->avail += (mwp->avail - 1) / 3;
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mwp->iused += (mwp->iused - 1) / 3;
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mwp->ifree += (mwp->ifree - 1) / 3;
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}
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if (hflag) {
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header = " Size";
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mwp->total = mwp->used = mwp->avail =
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(int)strlen(header);
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} else {
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header = getbsize(&headerlen, &blocksize);
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mwp->total = imax(mwp->total, headerlen);
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}
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mwp->used = imax(mwp->used, (int)strlen("Used"));
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mwp->avail = imax(mwp->avail, (int)strlen("Avail"));
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(void)printf("%-*s", mwp->mntfrom, "Filesystem");
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if (Tflag)
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(void)printf(" %-*s", mwp->fstype, "Type");
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(void)printf(" %*s %*s %*s Capacity", mwp->total, header,
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mwp->used, "Used", mwp->avail, "Avail");
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if (iflag) {
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mwp->iused = imax(hflag ? 0 : mwp->iused,
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(int)strlen(" iused"));
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mwp->ifree = imax(hflag ? 0 : mwp->ifree,
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(int)strlen("ifree"));
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(void)printf(" %*s %*s %%iused",
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mwp->iused - 2, "iused", mwp->ifree, "ifree");
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}
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(void)printf(" Mounted on\n");
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}
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/* Check for 0 block size. Can this happen? */
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if (sfsp->f_bsize == 0) {
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warnx ("File system %s does not have a block size, assuming 512.",
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sfsp->f_mntonname);
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sfsp->f_bsize = 512;
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}
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(void)printf("%-*s", mwp->mntfrom, sfsp->f_mntfromname);
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if (Tflag)
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(void)printf(" %-*s", mwp->fstype, sfsp->f_fstypename);
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used = sfsp->f_blocks - sfsp->f_bfree;
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availblks = sfsp->f_bavail + used;
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if (hflag) {
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prthuman(sfsp, used);
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} else {
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if (thousands)
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format = " %*j'd %*j'd %*j'd";
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else
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format = " %*jd %*jd %*jd";
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(void)printf(format,
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mwp->total, fsbtoblk(sfsp->f_blocks,
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sfsp->f_bsize, blocksize),
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mwp->used, fsbtoblk(used, sfsp->f_bsize, blocksize),
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mwp->avail, fsbtoblk(sfsp->f_bavail,
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sfsp->f_bsize, blocksize));
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}
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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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if (hflag) {
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(void)printf(" ");
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prthumanvalinode(used);
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prthumanvalinode(sfsp->f_ffree);
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} else {
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if (thousands)
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format = " %*j'd %*j'd";
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else
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format = " %*jd %*jd";
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(void)printf(format, mwp->iused, (intmax_t)used,
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mwp->ifree, (intmax_t)sfsp->f_ffree);
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}
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(void)printf(" %4.0f%% ", inodes == 0 ? 100.0 :
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(double)used / (double)inodes * 100.0);
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} else
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(void)printf(" ");
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if (strncmp(sfsp->f_mntfromname, "total", MNAMELEN) != 0)
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(void)printf(" %s", sfsp->f_mntonname);
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(void)printf("\n");
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|
}
|
|
|
|
static void
|
|
addstat(struct statfs *totalfsp, struct statfs *statfsp)
|
|
{
|
|
uint64_t bsize;
|
|
|
|
bsize = statfsp->f_bsize / totalfsp->f_bsize;
|
|
totalfsp->f_blocks += statfsp->f_blocks * bsize;
|
|
totalfsp->f_bfree += statfsp->f_bfree * bsize;
|
|
totalfsp->f_bavail += statfsp->f_bavail * bsize;
|
|
totalfsp->f_files += statfsp->f_files;
|
|
totalfsp->f_ffree += statfsp->f_ffree;
|
|
}
|
|
|
|
/*
|
|
* Update the maximum field-width information in `mwp' based on
|
|
* the file system specified by `sfsp'.
|
|
*/
|
|
static void
|
|
update_maxwidths(struct maxwidths *mwp, const struct statfs *sfsp)
|
|
{
|
|
static long blocksize = 0;
|
|
int dummy;
|
|
|
|
if (blocksize == 0)
|
|
getbsize(&dummy, &blocksize);
|
|
|
|
mwp->mntfrom = imax(mwp->mntfrom, (int)strlen(sfsp->f_mntfromname));
|
|
mwp->fstype = imax(mwp->fstype, (int)strlen(sfsp->f_fstypename));
|
|
mwp->total = imax(mwp->total, int64width(
|
|
fsbtoblk((int64_t)sfsp->f_blocks, sfsp->f_bsize, blocksize)));
|
|
mwp->used = imax(mwp->used,
|
|
int64width(fsbtoblk((int64_t)sfsp->f_blocks -
|
|
(int64_t)sfsp->f_bfree, sfsp->f_bsize, blocksize)));
|
|
mwp->avail = imax(mwp->avail, int64width(fsbtoblk(sfsp->f_bavail,
|
|
sfsp->f_bsize, blocksize)));
|
|
mwp->iused = imax(mwp->iused, int64width((int64_t)sfsp->f_files -
|
|
sfsp->f_ffree));
|
|
mwp->ifree = imax(mwp->ifree, int64width(sfsp->f_ffree));
|
|
}
|
|
|
|
/* Return the width in characters of the specified value. */
|
|
static int
|
|
int64width(int64_t val)
|
|
{
|
|
int len;
|
|
|
|
len = 0;
|
|
/* Negative or zero values require one extra digit. */
|
|
if (val <= 0) {
|
|
val = -val;
|
|
len++;
|
|
}
|
|
while (val > 0) {
|
|
len++;
|
|
val /= 10;
|
|
}
|
|
|
|
return (len);
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
|
|
(void)fprintf(stderr,
|
|
"usage: df [-b | -g | -H | -h | -k | -m | -P] [-acilnT] [-t type] [-,] [file | filesystem ...]\n");
|
|
exit(EX_USAGE);
|
|
}
|
|
|
|
static char *
|
|
makenetvfslist(void)
|
|
{
|
|
char *str, *strptr, **listptr;
|
|
struct xvfsconf *xvfsp, *keep_xvfsp;
|
|
size_t buflen;
|
|
int cnt, i, maxvfsconf;
|
|
|
|
if (sysctlbyname("vfs.conflist", NULL, &buflen, NULL, 0) < 0) {
|
|
warn("sysctl(vfs.conflist)");
|
|
return (NULL);
|
|
}
|
|
xvfsp = malloc(buflen);
|
|
if (xvfsp == NULL) {
|
|
warnx("malloc failed");
|
|
return (NULL);
|
|
}
|
|
keep_xvfsp = xvfsp;
|
|
if (sysctlbyname("vfs.conflist", xvfsp, &buflen, NULL, 0) < 0) {
|
|
warn("sysctl(vfs.conflist)");
|
|
free(keep_xvfsp);
|
|
return (NULL);
|
|
}
|
|
maxvfsconf = buflen / sizeof(struct xvfsconf);
|
|
|
|
if ((listptr = malloc(sizeof(char*) * maxvfsconf)) == NULL) {
|
|
warnx("malloc failed");
|
|
free(keep_xvfsp);
|
|
return (NULL);
|
|
}
|
|
|
|
for (cnt = 0, i = 0; i < maxvfsconf; i++) {
|
|
if (xvfsp->vfc_flags & VFCF_NETWORK) {
|
|
listptr[cnt++] = strdup(xvfsp->vfc_name);
|
|
if (listptr[cnt-1] == NULL) {
|
|
warnx("malloc failed");
|
|
free(listptr);
|
|
free(keep_xvfsp);
|
|
return (NULL);
|
|
}
|
|
}
|
|
xvfsp++;
|
|
}
|
|
|
|
if (cnt == 0 ||
|
|
(str = malloc(sizeof(char) * (32 * cnt + cnt + 2))) == NULL) {
|
|
if (cnt > 0)
|
|
warnx("malloc failed");
|
|
free(listptr);
|
|
free(keep_xvfsp);
|
|
return (NULL);
|
|
}
|
|
|
|
*str = 'n'; *(str + 1) = 'o';
|
|
for (i = 0, strptr = str + 2; i < cnt; i++, strptr++) {
|
|
strlcpy(strptr, listptr[i], 32);
|
|
strptr += strlen(listptr[i]);
|
|
*strptr = ',';
|
|
free(listptr[i]);
|
|
}
|
|
*(--strptr) = '\0';
|
|
|
|
free(keep_xvfsp);
|
|
free(listptr);
|
|
return (str);
|
|
}
|