287 lines
8.0 KiB
C
287 lines
8.0 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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#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/file.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <strings.h>
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#include <unistd.h>
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int bread();
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char *getmntpt();
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void prtstat();
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void ufs_df();
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void usage();
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int iflag;
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int
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main(argc, argv)
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int argc;
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register 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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int mntsize;
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int ch, err, i, maxwidth, width;
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char *mntpt;
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while ((ch = getopt(argc, argv, "i")) != EOF)
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switch (ch) {
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case 'i':
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iflag = 1;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
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maxwidth = 0;
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for (i = 0; i < mntsize; i++) {
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width = strlen(mntbuf[i].f_mntfromname);
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if (width > maxwidth)
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maxwidth = width;
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}
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if (!*argv) {
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for (i = 0; i < mntsize; i++)
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prtstat(&mntbuf[i], maxwidth);
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exit(0);
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}
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for (; *argv; argv++) {
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if (stat(*argv, &stbuf) < 0) {
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err = errno;
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if ((mntpt = getmntpt(*argv)) == 0) {
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warn("%s", *argv);
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continue;
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}
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} else if ((stbuf.st_mode & S_IFMT) == S_IFCHR) {
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ufs_df(*argv, maxwidth);
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continue;
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} else if ((stbuf.st_mode & S_IFMT) == S_IFBLK) {
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if ((mntpt = getmntpt(*argv)) == 0) {
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ufs_df(*argv, maxwidth);
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continue;
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}
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} else
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mntpt = *argv;
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/*
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* Statfs does not take a `wait' flag, so we cannot
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* implement nflag here.
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*/
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if (statfs(mntpt, &statfsbuf) < 0) {
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warn("%s", mntpt);
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continue;
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}
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if (argc == 1)
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maxwidth = strlen(statfsbuf.f_mntfromname) + 1;
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prtstat(&statfsbuf, maxwidth);
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}
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return (0);
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}
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char *
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getmntpt(name)
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char *name;
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{
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register int i;
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int mntsize;
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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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* 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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long
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fsbtoblk(num, fsbs, bs)
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long num;
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register int fsbs, bs;
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{
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return((fsbs != 0 && fsbs < bs) ?
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num / (bs / fsbs) : (num) * (fsbs / bs));
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}
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/*
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* Print out status about a filesystem.
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*/
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void
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prtstat(sfsp, maxwidth)
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register struct statfs *sfsp;
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register int maxwidth;
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{
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static int blocksize;
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static int headerlen, timesthrough;
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static char *header;
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long used, availblks;
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ino_t inodes, iused;
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if (maxwidth < 11)
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maxwidth = 11;
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if (++timesthrough == 1) {
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/* header = getbsize(&headerlen, &blocksize); */
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header = "1K-blocks";
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blocksize = 1024;
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headerlen = 9;
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(void)printf("%-*.*s %s Used Avail Capacity",
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maxwidth, maxwidth, "Filesystem", header);
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if (iflag)
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(void)printf(" iused ifree %%iused");
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(void)printf(" Mounted on\n");
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}
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(void)printf("%-*.*s", maxwidth, maxwidth, sfsp->f_mntfromname);
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used = sfsp->f_blocks - sfsp->f_bfree;
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availblks = sfsp->f_bavail + used;
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(void)printf(" %*ld %8ld %8ld", headerlen,
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fsbtoblk(sfsp->f_blocks, sfsp->f_bsize, blocksize),
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fsbtoblk(used, sfsp->f_bsize, blocksize),
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fsbtoblk(sfsp->f_bavail, sfsp->f_bsize, blocksize));
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(void)printf(" %5lu%%",
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availblks == 0 ? 100 : (unsigned long)used * 100 / availblks);
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if (iflag) {
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inodes = sfsp->f_files;
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iused = inodes - sfsp->f_ffree;
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(void)printf(" %7u %7u %5u%% ", iused, sfsp->f_ffree,
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inodes == 0 ? 100 : iused * 100 / inodes);
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} else
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(void)printf(" ");
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(void)printf(" %s\n", sfsp->f_mntonname);
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}
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/*
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* This code constitutes the pre-system call Berkeley df code for extracting
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* information from filesystem superblocks.
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*/
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#include <sys/fs.h>
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#include <fstab.h>
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union {
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struct fs fs;
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char dummy[SBSIZE];
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} sb;
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#define sblock sb.fs
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int rfd;
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void
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ufs_df(file, maxwidth)
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char *file;
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int maxwidth;
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{
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struct statfs statfsbuf;
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register struct statfs *sfsp;
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register char *mntpt;
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static int synced;
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if (synced++ == 0)
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sync();
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if ((rfd = open(file, O_RDONLY)) < 0) {
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warn("%s", file);
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return;
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}
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if (bread((off_t)SUPERB * DEV_BSIZE, &sblock, SBSIZE) == 0) {
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(void)close(rfd);
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return;
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}
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sfsp = &statfsbuf;
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sfsp->f_type = MOUNT_UFS;
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sfsp->f_flags = 0;
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sfsp->f_bsize = MAXBSIZE;
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sfsp->f_iosize = MAXBSIZE;
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sfsp->f_blocks = sblock.fs_fsize - sblock.fs_isize;
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sfsp->f_bfree = sblock.fs_tfree;
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sfsp->f_bavail = sblock.fs_tfree;
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if (sfsp->f_bavail < 0)
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sfsp->f_bavail = 0;
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sfsp->f_files = (sblock.fs_isize - 2) * INOPB;
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sfsp->f_ffree = sblock.fs_tinode;
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sfsp->f_fsid[0] = 0;
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sfsp->f_fsid[1] = 0;
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if ((mntpt = getmntpt(file)) == 0)
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mntpt = "";
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bcopy(mntpt, &sfsp->f_mntonname[0], MNAMELEN);
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bcopy(file, &sfsp->f_mntfromname[0], MNAMELEN);
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prtstat(sfsp, maxwidth);
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(void)close(rfd);
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}
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int
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bread(off, buf, cnt)
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off_t off;
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void *buf;
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register int cnt;
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{
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register int nr;
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(void)lseek(rfd, off, L_SET);
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if ((nr = read(rfd, buf, cnt)) != cnt) {
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/* Probably a dismounted disk if errno == EIO. */
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if (errno != EIO)
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(void)fprintf(stderr, "\ndf: %ld: %s\n",
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off, strerror(nr > 0 ? EIO : errno));
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return (0);
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}
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return (1);
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}
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void
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usage()
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{
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(void)fprintf(stderr, "usage: df [-i] [file | file_system ...]\n");
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exit(1);
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}
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