532aff98f6
in df(1) when we have multiple filesystem types, and the complications of handling UFS2 pushes this over the edge. Use the .../mount/extern.h to get prototypes of the functions we borrow from there. Constify things to match. (why aren't these functions in a lib anyway ?) Make everything static and set WARNS?=5. The way the "df diskdevice" thing works for unmounted diskdevices is not very general. Sponsored by: DARPA & NAI Labs.
543 lines
14 KiB
C
543 lines
14 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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#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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#if 0
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static char sccsid[] = "@(#)df.c 8.9 (Berkeley) 5/8/95";
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#else
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static const char rcsid[] =
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"$FreeBSD$";
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#endif
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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 <sys/sysctl.h>
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#include <ufs/ufs/ufsmount.h>
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#include <err.h>
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#include <math.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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#define KILO_SZ(n) (n)
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#define MEGA_SZ(n) ((n) * (n))
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#define GIGA_SZ(n) ((n) * (n) * (n))
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#define TERA_SZ(n) ((n) * (n) * (n) * (n))
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#define PETA_SZ(n) ((n) * (n) * (n) * (n) * (n))
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#define KILO_2_SZ (KILO_SZ(1024ULL))
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#define MEGA_2_SZ (MEGA_SZ(1024ULL))
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#define GIGA_2_SZ (GIGA_SZ(1024ULL))
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#define TERA_2_SZ (TERA_SZ(1024ULL))
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#define PETA_2_SZ (PETA_SZ(1024ULL))
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#define KILO_SI_SZ (KILO_SZ(1000ULL))
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#define MEGA_SI_SZ (MEGA_SZ(1000ULL))
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#define GIGA_SI_SZ (GIGA_SZ(1000ULL))
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#define TERA_SI_SZ (TERA_SZ(1000ULL))
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#define PETA_SI_SZ (PETA_SZ(1000ULL))
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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 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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unsigned long long vals_si [] = {1, KILO_SI_SZ, MEGA_SI_SZ, GIGA_SI_SZ, TERA_SI_SZ, PETA_SI_SZ};
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unsigned long long vals_base2[] = {1, KILO_2_SZ, MEGA_2_SZ, GIGA_2_SZ, TERA_2_SZ, PETA_2_SZ};
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unsigned long long *valp;
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typedef enum { NONE, KILO, MEGA, GIGA, TERA, PETA, UNIT_MAX } unit_t;
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unit_t unitp [] = { NONE, KILO, MEGA, GIGA, TERA, PETA };
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static char *getmntpt(char *);
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static int longwidth(long);
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static char *makenetvfslist(void);
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static void prthuman(struct statfs *, long);
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static void prthumanval(double);
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static void prtstat(struct statfs *, struct maxwidths *);
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static long regetmntinfo(struct statfs **, long, const char **);
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static unit_t unit_adjust(double *);
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static void update_maxwidths(struct maxwidths *, 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 (MAX(a, b));
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}
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static int aflag = 0, hflag, iflag, nflag;
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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, *mntbuf;
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struct maxwidths maxwidths;
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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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long mntsize;
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int ch, i, rv;
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fstype = "ufs";
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vfslist = NULL;
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while ((ch = getopt(argc, argv, "abgHhiklmnPt:")) != -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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putenv("BLOCKSIZE=512");
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hflag = 0;
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break;
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case 'g':
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putenv("BLOCKSIZE=1g");
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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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valp = vals_si;
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break;
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case 'h':
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hflag = UNITS_2;
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valp = vals_base2;
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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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putenv("BLOCKSIZE=1k");
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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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break;
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case 'm':
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putenv("BLOCKSIZE=1m");
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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 (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 '?':
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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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bzero(&maxwidths, sizeof(maxwidths));
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for (i = 0; i < mntsize; i++)
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update_maxwidths(&maxwidths, &mntbuf[i]);
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rv = 0;
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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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bzero(&maxwidths, sizeof(maxwidths));
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for (i = 0; i < mntsize; i++)
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update_maxwidths(&maxwidths, &mntbuf[i]);
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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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}
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exit(rv);
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}
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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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} 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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if (argc == 1) {
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bzero(&maxwidths, sizeof(maxwidths));
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update_maxwidths(&maxwidths, &statfsbuf);
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}
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prtstat(&statfsbuf, &maxwidths);
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}
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return (rv);
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}
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static char *
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getmntpt(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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static long
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regetmntinfo(struct statfs **mntbufp, long mntsize, const 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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* Output in "human-readable" format. Uses 3 digits max and puts
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* unit suffixes at the end. Makes output compact and easy to read,
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* especially on huge disks.
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*
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*/
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static unit_t
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unit_adjust(double *val)
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{
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double abval;
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unit_t unit;
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unsigned int unit_sz;
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abval = fabs(*val);
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unit_sz = abval ? ilogb(abval) / 10 : 0;
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if (unit_sz >= UNIT_MAX) {
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unit = NONE;
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} else {
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unit = unitp[unit_sz];
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*val /= (double)valp[unit_sz];
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}
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return (unit);
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}
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static void
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prthuman(struct statfs *sfsp, long used)
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{
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prthumanval((double)sfsp->f_blocks * (double)sfsp->f_bsize);
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prthumanval((double)used * (double)sfsp->f_bsize);
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prthumanval((double)sfsp->f_bavail * (double)sfsp->f_bsize);
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}
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static void
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prthumanval(double bytes)
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{
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unit_t unit;
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unit = unit_adjust(&bytes);
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if (bytes == 0)
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(void)printf(" 0B");
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else if (bytes > 10)
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(void)printf(" %5.0f%c", bytes, "BKMGTPE"[unit]);
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else
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(void)printf(" %5.1f%c", bytes, "BKMGTPE"[unit]);
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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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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;
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static const char *header;
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long used, availblks, inodes;
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if (++timesthrough == 1) {
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mwp->mntfrom = imax(mwp->mntfrom, strlen("Filesystem"));
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if (hflag) {
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header = " Size";
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mwp->total = mwp->used = mwp->avail = 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, strlen("Used"));
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mwp->avail = imax(mwp->avail, strlen("Avail"));
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(void)printf("%-*s %-*s %*s %*s Capacity", mwp->mntfrom,
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"Filesystem", mwp->total, header, mwp->used, "Used",
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mwp->avail, "Avail");
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if (iflag) {
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mwp->iused = imax(mwp->iused, strlen(" iused"));
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mwp->ifree = imax(mwp->ifree, strlen("ifree"));
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(void)printf(" %*s %*s %%iused", mwp->iused - 2,
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"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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(void)printf("%-*s", mwp->mntfrom, 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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if (hflag) {
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prthuman(sfsp, used);
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} else {
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(void)printf(" %*ld %*ld %*ld", mwp->total,
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fsbtoblk(sfsp->f_blocks, 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, sfsp->f_bsize,
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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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(void)printf(" %*ld %*ld %4.0f%% ", mwp->iused, used,
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mwp->ifree, sfsp->f_ffree, 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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(void)printf(" %s\n", sfsp->f_mntonname);
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}
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|
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/*
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* Update the maximum field-width information in `mwp' based on
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* the filesystem specified by `sfsp'.
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*/
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static void
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update_maxwidths(struct maxwidths *mwp, struct statfs *sfsp)
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{
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static long blocksize;
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int dummy;
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if (blocksize == 0)
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getbsize(&dummy, &blocksize);
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mwp->mntfrom = imax(mwp->mntfrom, strlen(sfsp->f_mntfromname));
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mwp->total = imax(mwp->total, longwidth(fsbtoblk(sfsp->f_blocks,
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sfsp->f_bsize, blocksize)));
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mwp->used = imax(mwp->used, longwidth(fsbtoblk(sfsp->f_blocks -
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sfsp->f_bfree, sfsp->f_bsize, blocksize)));
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mwp->avail = imax(mwp->avail, longwidth(fsbtoblk(sfsp->f_bavail,
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sfsp->f_bsize, blocksize)));
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mwp->iused = imax(mwp->iused, longwidth(sfsp->f_files -
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sfsp->f_ffree));
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mwp->ifree = imax(mwp->ifree, longwidth(sfsp->f_ffree));
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}
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/* Return the width in characters of the specified long. */
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static int
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longwidth(long val)
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{
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int len;
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len = 0;
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/* Negative or zero values require one extra digit. */
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if (val <= 0) {
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val = -val;
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len++;
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}
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while (val > 0) {
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len++;
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val /= 10;
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}
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return (len);
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}
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static void
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usage(void)
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|
{
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|
(void)fprintf(stderr,
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"usage: df [-b | -H | -h | -k | -m | -P] [-ailn] [-t type] [file | filesystem ...]\n");
|
|
exit(EX_USAGE);
|
|
}
|
|
|
|
static char *
|
|
makenetvfslist(void)
|
|
{
|
|
char *str, *strptr, **listptr;
|
|
int mib[3], maxvfsconf, cnt=0, i;
|
|
size_t miblen;
|
|
struct ovfsconf *ptr;
|
|
|
|
mib[0] = CTL_VFS; mib[1] = VFS_GENERIC; mib[2] = VFS_MAXTYPENUM;
|
|
miblen=sizeof(maxvfsconf);
|
|
if (sysctl(mib, (unsigned int)(sizeof(mib) / sizeof(mib[0])),
|
|
&maxvfsconf, &miblen, NULL, 0)) {
|
|
warnx("sysctl failed");
|
|
return (NULL);
|
|
}
|
|
|
|
if ((listptr = malloc(sizeof(char*) * maxvfsconf)) == NULL) {
|
|
warnx("malloc failed");
|
|
return (NULL);
|
|
}
|
|
|
|
for (ptr = getvfsent(); ptr; ptr = getvfsent())
|
|
if (ptr->vfc_flags & VFCF_NETWORK) {
|
|
listptr[cnt++] = strdup(ptr->vfc_name);
|
|
if (listptr[cnt-1] == NULL) {
|
|
warnx("malloc failed");
|
|
return (NULL);
|
|
}
|
|
}
|
|
|
|
if (cnt == 0 ||
|
|
(str = malloc(sizeof(char) * (32 * cnt + cnt + 2))) == NULL) {
|
|
if (cnt > 0)
|
|
warnx("malloc failed");
|
|
free(listptr);
|
|
return (NULL);
|
|
}
|
|
|
|
*str = 'n'; *(str + 1) = 'o';
|
|
for (i = 0, strptr = str + 2; i < cnt; i++, strptr++) {
|
|
strncpy(strptr, listptr[i], 32);
|
|
strptr += strlen(listptr[i]);
|
|
*strptr = ',';
|
|
free(listptr[i]);
|
|
}
|
|
*(--strptr) = NULL;
|
|
|
|
free(listptr);
|
|
return (str);
|
|
}
|