536 lines
14 KiB
C
536 lines
14 KiB
C
/* $NetBSD: df.c,v 1.85 2009/01/25 14:18:21 lukem Exp $ */
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/*
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* Copyright (c) 1980, 1990, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. 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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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT(
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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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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)df.c 8.7 (Berkeley) 4/2/94";
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#else
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__RCSID("$NetBSD: df.c,v 1.85 2009/01/25 14:18:21 lukem Exp $");
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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 <assert.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 <locale.h>
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#include <util.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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extern char *strpct(u_long, u_long, u_int);
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int main(int, char *[]);
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int bread(off_t, void *, int);
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char *getmntpt(char *);
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void prtstat(struct statvfs *, int);
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int selected(const char *, size_t);
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void maketypelist(char *);
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long regetmntinfo(struct statvfs **, long);
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void usage(void);
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void prthumanval(int64_t, const char *);
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void prthuman(struct statvfs *, int64_t, int64_t);
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const char *
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strpct64(uint64_t, uint64_t, u_int);
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int aflag, gflag, hflag, iflag, lflag, nflag, Pflag;
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long usize = 0;
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char **typelist = NULL;
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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 statvfs *mntbuf;
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long mntsize;
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int ch, i, maxwidth, width;
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char *mntpt;
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setprogname(argv[0]);
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(void)setlocale(LC_ALL, "");
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while ((ch = getopt(argc, argv, "aGghiklmnPt:")) != -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 'g':
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hflag = 0;
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usize = 1024 * 1024 * 1024;
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break;
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case 'G':
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gflag = 1;
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break;
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case 'h':
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hflag = 1;
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usize = 0;
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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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hflag = 0;
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usize = 1024;
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break;
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case 'l':
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lflag = 1;
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break;
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case 'm':
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hflag = 0;
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usize = 1024 * 1024;
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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 'P':
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Pflag = 1;
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break;
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case 't':
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if (typelist != NULL)
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errx(EXIT_FAILURE,
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"only one -t option may be specified.");
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maketypelist(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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if (gflag && (Pflag || iflag))
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errx(EXIT_FAILURE,
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"only one of -G and -P or -i may be specified");
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if (Pflag && iflag)
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errx(EXIT_FAILURE,
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"only one of -P and -i may be specified");
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#if 0
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/*
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* The block size cannot be checked until after getbsize() is called.
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*/
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if (Pflag && (hflag || (usize != 1024 && usize != 512)))
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errx(EXIT_FAILURE,
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"non-standard block size incompatible with -P");
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#endif
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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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if (mntsize == 0)
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err(EXIT_FAILURE,
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"retrieving information on mounted file systems");
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if (*argv == NULL) {
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mntsize = regetmntinfo(&mntbuf, mntsize);
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} else {
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if ((mntbuf = malloc(argc * sizeof(*mntbuf))) == NULL)
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err(EXIT_FAILURE, "can't allocate statvfs array");
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mntsize = 0;
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for (/*EMPTY*/; *argv != NULL; 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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continue;
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}
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} else if (S_ISBLK(stbuf.st_mode)) {
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if ((mntpt = getmntpt(*argv)) == 0)
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mntpt = *argv;
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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 (!statvfs(mntpt, &mntbuf[mntsize]))
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if (lflag &&
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(mntbuf[mntsize].f_flag & MNT_LOCAL) == 0)
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warnx("Warning: %s is not a local %s",
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*argv, "file system");
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else if
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(!selected(mntbuf[mntsize].f_fstypename,
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sizeof(mntbuf[mntsize].f_fstypename)))
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warnx("Warning: %s mounted as a %s %s",
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*argv,
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mntbuf[mntsize].f_fstypename,
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"file system");
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else
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++mntsize;
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else
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warn("%s", *argv);
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}
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}
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maxwidth = 0;
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for (i = 0; i < mntsize; i++) {
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width = (int)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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for (i = 0; i < mntsize; i++)
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prtstat(&mntbuf[i], maxwidth);
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exit(0);
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/* NOTREACHED */
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}
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char *
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getmntpt(char *name)
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{
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long mntsize, i;
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struct statvfs *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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static enum { IN_LIST, NOT_IN_LIST } which;
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int
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selected(const char *type, size_t len)
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{
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char **av;
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/* If no type specified, it's always selected. */
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if (typelist == NULL)
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return (1);
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for (av = typelist; *av != NULL; ++av)
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if (!strncmp(type, *av, len))
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return (which == IN_LIST ? 1 : 0);
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return (which == IN_LIST ? 0 : 1);
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}
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void
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maketypelist(char *fslist)
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{
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int i;
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char *nextcp, **av;
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if ((fslist == NULL) || (fslist[0] == '\0'))
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errx(EXIT_FAILURE, "empty type list");
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/*
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* XXX
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* Note: the syntax is "noxxx,yyy" for no xxx's and
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* no yyy's, not the more intuitive "noyyy,noyyy".
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*/
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if (fslist[0] == 'n' && fslist[1] == 'o') {
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fslist += 2;
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which = NOT_IN_LIST;
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} else
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which = IN_LIST;
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/* Count the number of types. */
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for (i = 1, nextcp = fslist;
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(nextcp = strchr(nextcp, ',')) != NULL; i++)
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++nextcp;
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/* Build an array of that many types. */
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if ((av = typelist = malloc((i + 1) * sizeof(char *))) == NULL)
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err(EXIT_FAILURE, "can't allocate type array");
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av[0] = fslist;
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for (i = 1, nextcp = fslist;
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(nextcp = strchr(nextcp, ',')) != NULL; i++) {
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*nextcp = '\0';
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av[i] = ++nextcp;
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}
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/* Terminate the array. */
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av[i] = NULL;
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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 statvfs bufs.
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*/
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long
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regetmntinfo(struct statvfs **mntbufp, long mntsize)
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{
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int i, j;
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struct statvfs *mntbuf;
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if (!lflag && typelist == NULL && aflag)
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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 (!aflag && (mntbuf[i].f_flag & MNT_IGNORE) != 0)
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continue;
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if (lflag && (mntbuf[i].f_flag & MNT_LOCAL) == 0)
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continue;
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if (!selected(mntbuf[i].f_fstypename,
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sizeof(mntbuf[i].f_fstypename)))
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continue;
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if (nflag)
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mntbuf[j] = mntbuf[i];
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else {
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struct statvfs layerbuf = mntbuf[i];
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(void)statvfs(mntbuf[i].f_mntonname, &mntbuf[j]);
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/*
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* If the FS name changed, then new data is for
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* a different layer and we don't want it.
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*/
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if (memcmp(layerbuf.f_mntfromname,
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mntbuf[j].f_mntfromname, MNAMELEN))
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mntbuf[j] = layerbuf;
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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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void
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prthumanval(int64_t bytes, const char *pad)
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{
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char buf[6];
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(void)humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1),
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bytes, "", HN_AUTOSCALE,
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HN_B | HN_NOSPACE | HN_DECIMAL);
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(void)printf("%s %6s", pad, buf);
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}
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void
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prthuman(struct statvfs *sfsp, int64_t used, int64_t bavail)
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{
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prthumanval((int64_t)(sfsp->f_blocks * sfsp->f_frsize), " ");
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prthumanval((int64_t)(used * sfsp->f_frsize), " ");
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prthumanval((int64_t)(bavail * sfsp->f_frsize), " ");
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}
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/*
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* Convert statvfs 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 && (uint64_t)(fsbs) < (uint64_t)(bs)) ? \
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(int64_t)(num) / (int64_t)((bs) / (fsbs)) : \
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(int64_t)(num) * (int64_t)((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(struct statvfs *sfsp, 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 const char *header;
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static const char full[] = "100%";
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static const char empty[] = " 0%";
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int64_t used, availblks, inodes;
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int64_t bavail;
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if (gflag) {
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/*
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* From SunOS-5.6:
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*
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* /var (/dev/dsk/c0t0d0s3 ): 8192 block size 1024 frag size
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* 984242 total blocks 860692 free blocks 859708 available 249984 total files
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* 248691 free files 8388611 filesys id
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* ufs fstype 0x00000004 flag 255 filename length
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*
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*/
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(void)printf("%10s (%-12s): %7ld block size %12ld frag size\n",
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sfsp->f_mntonname, sfsp->f_mntfromname,
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sfsp->f_iosize, /* On UFS/FFS systems this is
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* also called the "optimal
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* transfer block size" but it
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* is of course the file
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* system's block size too.
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*/
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sfsp->f_bsize); /* not so surprisingly the
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* "fundamental file system
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* block size" is the frag
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* size.
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*/
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(void)printf("%10" PRId64 " total blocks %10" PRId64
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" free blocks %10" PRId64 " available\n",
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(uint64_t)sfsp->f_blocks, (uint64_t)sfsp->f_bfree,
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(uint64_t)sfsp->f_bavail);
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(void)printf("%10" PRId64 " total files %10" PRId64
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" free files %12lx filesys id\n",
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(uint64_t)sfsp->f_ffree, (uint64_t)sfsp->f_files,
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sfsp->f_fsid);
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(void)printf("%10s fstype %#15lx flag %17ld filename "
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"length\n", sfsp->f_fstypename, sfsp->f_flag,
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sfsp->f_namemax);
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(void)printf("%10lu owner %17" PRId64 " syncwrites %12" PRId64
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" asyncwrites\n\n", (unsigned long)sfsp->f_owner,
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sfsp->f_syncwrites, sfsp->f_asyncwrites);
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/*
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* a concession by the structured programming police to the
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* indentation police....
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*/
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return;
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}
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if (maxwidth < 12)
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maxwidth = 12;
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if (++timesthrough == 1) {
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switch (blocksize = usize) {
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case 1024:
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header = Pflag ? "1024-blocks" : "1K-blocks";
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headerlen = (int)strlen(header);
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break;
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case 1024 * 1024:
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header = "1M-blocks";
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headerlen = (int)strlen(header);
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break;
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case 1024 * 1024 * 1024:
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header = "1G-blocks";
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headerlen = (int)strlen(header);
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break;
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default:
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if (hflag) {
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header = "Size";
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headerlen = (int)strlen(header);
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} else
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header = getbsize(&headerlen, &blocksize);
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break;
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}
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if (Pflag) {
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/*
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* either:
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* "Filesystem 1024-blocks Used Available Capacity Mounted on\n"
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* or:
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* "Filesystem 512-blocks Used Available Capacity Mounted on\n"
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*/
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if (blocksize != 1024 && blocksize != 512)
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errx(EXIT_FAILURE,
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"non-standard block size incompatible with -P");
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(void)printf("Filesystem %s Used Available Capacity "
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"Mounted on\n", header);
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} else {
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(void)printf("%-*.*s %s Used Avail %%Cap",
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maxwidth - (headerlen - 9),
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maxwidth - (headerlen - 9),
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"Filesystem", header);
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if (iflag)
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(void)printf(" iUsed iAvail %%iCap");
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(void)printf(" Mounted on\n");
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}
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}
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used = sfsp->f_blocks - sfsp->f_bfree;
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bavail = sfsp->f_bfree - sfsp->f_bresvd;
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availblks = bavail + used;
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if (Pflag) {
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assert(hflag == 0);
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assert(blocksize > 0);
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/*
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* "%s %d %d %d %s %s\n", <file system name>, <total space>,
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* <space used>, <space free>, <percentage used>,
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* <file system root>
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*/
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(void)printf("%s %" PRId64 " %" PRId64 " %" PRId64 " %s %s\n",
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sfsp->f_mntfromname,
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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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availblks == 0 ? full : strpct64((uint64_t) used,
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(uint64_t) availblks, 0), sfsp->f_mntonname);
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/*
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* another concession by the structured programming police to
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* the indentation police....
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*
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* Note iflag cannot be set when Pflag is set.
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*/
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return;
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}
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(void)printf("%-*.*s ", maxwidth, maxwidth, sfsp->f_mntfromname);
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if (hflag)
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prthuman(sfsp, used, bavail);
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else
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(void)printf("%10" PRId64 " %10" PRId64 " %10" PRId64,
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fsbtoblk(sfsp->f_blocks, sfsp->f_frsize, blocksize),
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fsbtoblk(used, sfsp->f_frsize, blocksize),
|
|
fsbtoblk(bavail, sfsp->f_frsize, blocksize));
|
|
(void)printf(" %4s",
|
|
availblks == 0 ? full :
|
|
/* We know that these values are never negative */
|
|
strpct64((uint64_t)used, (uint64_t)availblks, 0));
|
|
if (iflag) {
|
|
inodes = sfsp->f_files;
|
|
used = inodes - sfsp->f_ffree;
|
|
(void)printf(" %8jd %8jd %4s",
|
|
(intmax_t)used, (intmax_t)sfsp->f_ffree,
|
|
inodes == 0 ? (used == 0 ? empty : full) :
|
|
strpct64((uint64_t)used, (uint64_t)inodes, 0));
|
|
}
|
|
(void)printf(" %s\n", sfsp->f_mntonname);
|
|
}
|
|
|
|
void
|
|
usage(void)
|
|
{
|
|
|
|
(void)fprintf(stderr,
|
|
"Usage: %s [-aGgln] [-hkm|-ihkm|-Pk] [-t type] [file | "
|
|
"file_system ...]\n",
|
|
getprogname());
|
|
exit(1);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
const char *
|
|
strpct64(uint64_t numerator, uint64_t denominator, u_int digits)
|
|
{
|
|
|
|
while (denominator > ULONG_MAX) {
|
|
numerator >>= 1;
|
|
denominator >>= 1;
|
|
}
|
|
return (strpct((u_long)numerator, (u_long)denominator, digits));
|
|
}
|