449 lines
11 KiB
C
449 lines
11 KiB
C
/* $NetBSD: df.c,v 1.30 1998/07/28 05:31:24 mycroft 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. 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/cdefs.h>
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#ifndef lint
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__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 8.7 (Berkeley) 4/2/94";
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#else
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__RCSID("$NetBSD: df.c,v 1.30 1998/07/28 05:31:24 mycroft 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 <ufs/ufs/ufsmount.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 <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 __P((u_long num, u_long denom, u_int digits));
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int main __P((int, char *[]));
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int bread __P((off_t, void *, int));
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char *getmntpt __P((char *));
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void prtstat __P((struct statfs *, int));
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int ufs_df __P((char *, struct statfs *));
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int selected __P((const char *));
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void maketypelist __P((char *));
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long regetmntinfo __P((struct statfs **, long));
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void usage __P((void));
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int iflag, kflag, lflag, nflag;
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char **typelist = NULL;
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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 *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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while ((ch = getopt(argc, argv, "iklnt:")) != -1)
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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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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 't':
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if (typelist != NULL)
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errx(1, "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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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(1, "retrieving information on mounted file systems");
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if (!*argv) {
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mntsize = regetmntinfo(&mntbuf, mntsize);
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} else {
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mntbuf = malloc(argc * sizeof(struct statfs));
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mntsize = 0;
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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 (S_ISCHR(stbuf.st_mode)) {
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if (!ufs_df(*argv, &mntbuf[mntsize]))
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++mntsize;
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continue;
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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 = strdup("/tmp/df.XXXXXX");
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if (!mkdtemp(mntpt)) {
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warn("%s", mntpt);
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continue;
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}
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mdev.fspec = *argv;
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if (mount(MOUNT_FFS, mntpt, MNT_RDONLY,
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&mdev) != 0) {
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(void)rmdir(mntpt);
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if (!ufs_df(*argv,
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&mntbuf[mntsize]))
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++mntsize;
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continue;
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} else if (!statfs(mntpt,
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&mntbuf[mntsize])) {
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mntbuf[mntsize].f_mntonname[0] =
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'\0';
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++mntsize;
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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, &mntbuf[mntsize]))
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if (lflag &&
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(mntbuf[mntsize].f_flags & 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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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 = 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(name)
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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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static enum { IN_LIST, NOT_IN_LIST } which;
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int
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selected(type)
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const char *type;
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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, MFSNAMELEN))
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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(fslist)
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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(1, "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(1, "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 statfs bufs.
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*/
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long
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regetmntinfo(mntbufp, mntsize)
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struct statfs **mntbufp;
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long mntsize;
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{
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int i, j;
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struct statfs *mntbuf;
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if (!lflag && typelist == NULL)
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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 (lflag && (mntbuf[i].f_flags & MNT_LOCAL) == 0)
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continue;
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if (!selected(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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(void)statfs(mntbuf[i].f_mntonname, &mntbuf[j]);
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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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* 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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void
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prtstat(sfsp, maxwidth)
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struct statfs *sfsp;
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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 char *header;
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long used, availblks, inodes;
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static char *full = "100%";
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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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blocksize = 1024;
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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 %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(" %6s",
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availblks == 0 ? full : strpct((ulong)used, (ulong)availblks, 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 %6s ", used, sfsp->f_ffree,
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inodes == 0 ? full : strpct((ulong)used, (ulong)inodes, 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 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 <ufs/ufs/dinode.h>
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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 rfd;
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int
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ufs_df(file, sfsp)
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char *file;
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struct statfs *sfsp;
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{
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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 ((rfd = open(file, O_RDONLY)) < 0) {
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warn("%s", file);
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return (-1);
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}
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if (bread((off_t)SBOFF, &sblock, SBSIZE) == 0) {
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(void)close(rfd);
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return (-1);
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}
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sfsp->f_type = 0;
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sfsp->f_flags = 0;
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sfsp->f_bsize = sblock.fs_fsize;
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sfsp->f_iosize = sblock.fs_bsize;
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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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(void)memmove(&sfsp->f_mntonname[0], mntpt, MNAMELEN);
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(void)memmove(&sfsp->f_mntfromname[0], file, MNAMELEN);
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(void)strncpy(sfsp->f_fstypename, MOUNT_FFS, MFSNAMELEN);
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(void)close(rfd);
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return (0);
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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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int cnt;
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{
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int nr;
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(void)lseek(rfd, off, SEEK_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: %qd: %s\n",
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(long long)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 [-ikln] [-t type] [file | file_system ...]\n");
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exit(1);
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/* NOTREACHED */
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}
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