322 lines
8.3 KiB
C
322 lines
8.3 KiB
C
/*
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* Copyright (c) 1980, 1990 The Regents of the University of California.
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* 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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char copyright[] =
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"@(#) Copyright (c) 1980, 1990 The Regents of the University of California.\n\
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All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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/*static char sccsid[] = "from: @(#)df.c 5.30 (Berkeley) 4/23/92";*/
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static char rcsid[] = "$Id: df.c,v 1.13 1994/06/13 06:39:17 chopps Exp $";
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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 <errno.h>
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#include <err.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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int bread __P((long, char *, int));
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char *getmntpt __P((char *));
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void prtstat __P((struct statfs *, long));
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void ufs_df __P((char *, long));
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void usage __P((void));
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int iflag, kflag = 0, nflag, lflag;
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long blocksize, mntsize;
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struct statfs *mntbuf;
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struct ufs_args mdev;
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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struct stat stbuf;
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struct statfs statfsbuf;
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long width, maxwidth;
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int ch, i;
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char *mntpt;
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while ((ch = getopt(argc, argv, "ikln")) != EOF)
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switch(ch) {
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case 'i':
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iflag = 1;
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break;
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case 'k':
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blocksize = 1024;
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kflag = 1;
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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 'n':
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nflag = 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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if (*argv && lflag)
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errx(1, "-l does not make sense with list of mount points");
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mntsize = getmntinfo(&mntbuf, (nflag ? MNT_NOWAIT : MNT_WAIT));
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if (mntsize == 0)
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err(1, "retrieving informaation on mounted file systems");
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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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if (!lflag || mntbuf[i].f_flags & MNT_LOCAL)
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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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if ((mntpt = getmntpt(*argv)) == 0) {
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warn("%s", *argv);
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continue;
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}
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} else if ((stbuf.st_mode & S_IFMT) == S_IFCHR) {
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ufs_df(*argv, maxwidth);
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continue;
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} else if ((stbuf.st_mode & S_IFMT) == S_IFBLK) {
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if ((mntpt = getmntpt(*argv)) == 0) {
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mntpt = mktemp(strdup("/tmp/df.XXXXXX"));
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mdev.fspec = *argv;
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if (mkdir(mntpt, DEFFILEMODE) != 0) {
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warn("%s", mntpt);
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continue;
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}
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if (mount(MOUNT_UFS, mntpt, MNT_RDONLY,
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&mdev) != 0) {
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ufs_df(*argv, maxwidth);
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(void)rmdir(mntpt);
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continue;
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} else if (statfs(mntpt, &statfsbuf)) {
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statfsbuf.f_mntonname[0] = '\0';
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prtstat(&statfsbuf, maxwidth);
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} else
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warn("%s", *argv);
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(void)unmount(mntpt, 0);
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(void)rmdir(mntpt);
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continue;
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}
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} else
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mntpt = *argv;
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/*
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* Statfs does not take a `wait' flag, so we cannot
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* implement nflag here.
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*/
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if (statfs(mntpt, &statfsbuf) < 0) {
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warn("%s", mntpt);
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continue;
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}
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if (argc == 1)
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maxwidth = strlen(statfsbuf.f_mntfromname) + 1;
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prtstat(&statfsbuf, maxwidth);
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}
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return (0);
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}
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char *
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getmntpt(name)
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char *name;
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{
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long i;
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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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* 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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long maxwidth;
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{
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static int headerlen, timesthrough;
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static char *header;
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long used, availblks, inodes;
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if (maxwidth < 11)
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maxwidth = 11;
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if (++timesthrough == 1) {
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if (kflag) {
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header = "1K-blocks";
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headerlen = strlen(header);
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} else
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header = getbsize(&headerlen, &blocksize);
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(void)printf("%-*.*s %s Used Avail Capacity",
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maxwidth, maxwidth, "Filesystem", header);
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if (iflag)
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(void)printf(" iused ifree %%iused");
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(void)printf(" Mounted on\n");
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}
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(void)printf("%-*.*s", maxwidth, maxwidth, sfsp->f_mntfromname);
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used = sfsp->f_blocks - sfsp->f_bfree;
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availblks = sfsp->f_bavail + used;
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(void)printf(" %*ld %7ld %7ld", headerlen,
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sfsp->f_blocks * sfsp->f_bsize / blocksize,
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used * sfsp->f_bsize / blocksize,
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sfsp->f_bavail * sfsp->f_bsize / blocksize);
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(void)printf(" %5.0f%%",
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availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
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if (iflag) {
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inodes = sfsp->f_files;
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used = inodes - sfsp->f_ffree;
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(void)printf(" %7ld %7ld %5.0f%% ", used, sfsp->f_ffree,
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inodes == 0 ? 100.0 : (double)used / (double)inodes * 100.0);
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} else
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(void)printf(" ");
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(void)printf(" %s\n", sfsp->f_mntonname);
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}
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/*
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* This code constitutes the old df code for extracting
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* information from filesystem superblocks.
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*/
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#include <ufs/ffs/fs.h>
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#include <errno.h>
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#include <fstab.h>
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union {
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struct fs iu_fs;
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char dummy[SBSIZE];
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} sb;
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#define sblock sb.iu_fs
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int fi;
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void
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ufs_df(file, maxwidth)
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char *file;
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long maxwidth;
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{
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struct statfs statfsbuf;
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register struct statfs *sfsp;
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char *mntpt;
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static int synced;
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if (synced++ == 0)
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sync();
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if ((fi = 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((long)SBOFF, (char *)&sblock, SBSIZE) == 0) {
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(void)close(fi);
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return;
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}
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sfsp = &statfsbuf;
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sfsp->f_type = 0;
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sfsp->f_flags = 0;
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sfsp->f_iosize = sblock.fs_fsize;
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#ifdef notyet
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sfsp->f_iosize = sblock.fs_bsize;
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#endif
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sfsp->f_blocks = sblock.fs_dsize;
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sfsp->f_bfree = sblock.fs_cstotal.cs_nbfree * sblock.fs_frag +
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sblock.fs_cstotal.cs_nffree;
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sfsp->f_bavail = (sblock.fs_dsize * (100 - sblock.fs_minfree) / 100) -
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(sblock.fs_dsize - sfsp->f_bfree);
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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_ncg * sblock.fs_ipg;
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sfsp->f_ffree = sblock.fs_cstotal.cs_nifree;
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sfsp->f_fsid.val[0] = 0;
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sfsp->f_fsid.val[1] = 0;
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if ((mntpt = getmntpt(file)) == 0)
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mntpt = "";
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bcopy((caddr_t)mntpt, (caddr_t)&sfsp->f_mntonname[0], MNAMELEN);
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bcopy((caddr_t)file, (caddr_t)&sfsp->f_mntfromname[0], MNAMELEN);
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strncpy(sfsp->f_fstypename, MOUNT_UFS, MFSNAMELEN);
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sfsp->f_fstypename[MFSNAMELEN] = '\0';
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prtstat(sfsp, maxwidth);
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(void) close(fi);
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}
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int
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bread(off, buf, cnt)
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long off;
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char *buf;
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int cnt;
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{
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int n;
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(void) lseek(fi, off, SEEK_SET);
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if ((n=read(fi, 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)printf("\nread error off = %ld\n", off);
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(void)printf("count = %d: %s\n", n, strerror(errno));
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}
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return (0);
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}
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return (1);
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}
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void
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usage()
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{
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fprintf(stderr, "usage: df [-ikln] [file | file_system ...]\n");
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exit(1);
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}
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