[unix-history] / bin / df / df.c

/*
 * Copyright (c) UNIX System Laboratories, Inc.  All or some portions
 * of this file are derived from material licensed to the
 * University of California by American Telephone and Telegraph Co.
 * or UNIX System Laboratories, Inc. and are reproduced herein with
 * the permission of UNIX System Laboratories, Inc.
 *
 *	$Id$
 */
/*
 * Copyright (c) 1980, 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1980, 1990 The Regents of the University of California.\n\
 All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)df.c	5.30 (Berkeley) 4/23/92";
#endif /* not lint */

#include <sys/param.h>
#include <sys/stat.h>
#include <sys/mount.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

int	 bread __P((long, char *, int));
char	*getbsize __P((char *, int *, long *));
char	*getmntpt __P((char *));
void	 prtstat __P((struct statfs *, long));
void	 ufs_df __P((char *, long));
void	 usage __P((void));

int	iflag, kflag, nflag;
struct	ufs_args mdev;

int
main(argc, argv)
	int argc;
	char *argv[];
{
	struct stat stbuf;
	struct statfs statfsbuf, *mntbuf;
	long width, maxwidth, mntsize;
	int err, ch, i;
	char *mntpt;

	iflag = kflag = nflag = 0;
	while ((ch = getopt(argc, argv, "ikn")) != EOF)
		switch(ch) {
		case 'i':
			iflag = 1;
			break;
		case 'k':
			kflag = 1;
			break;
		case 'n':
			nflag = 1;
			break;
		case '?':
		default:
			usage();
		}
	argc -= optind;
	argv += optind;

	mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
	maxwidth = 0;
	for (i = 0; i < mntsize; i++) {
		width = strlen(mntbuf[i].f_mntfromname);
		if (width > maxwidth)
			maxwidth = width;
	}
	if (!*argv) {
		mntsize = getmntinfo(&mntbuf, (nflag ? MNT_NOWAIT : MNT_WAIT));
		for (i = 0; i < mntsize; i++)
			prtstat(&mntbuf[i], maxwidth);
		exit(0);
	}
	for (; *argv; argv++) {
		if (stat(*argv, &stbuf) < 0) {
			err = errno;
			if ((mntpt = getmntpt(*argv)) == 0) {
				fprintf(stderr, "df: %s: %s\n", *argv,
				    strerror(err));
				continue;
			}
		} else if ((stbuf.st_mode & S_IFMT) == S_IFCHR) {
			ufs_df(*argv, maxwidth);
			continue;
		} else if ((stbuf.st_mode & S_IFMT) == S_IFBLK) {
			if ((mntpt = getmntpt(*argv)) == 0) {
				mntpt = mktemp(strdup("/tmp/df.XXXXXX"));
				mdev.fspec = *argv;
				if (mkdir(mntpt, DEFFILEMODE) != 0) {
					fprintf(stderr, "df: %s: %s\n",
					    mntpt, strerror(errno));
					continue;
				}
				if (mount(MOUNT_UFS, mntpt, MNT_RDONLY,
				    &mdev) != 0) {
					ufs_df(*argv, maxwidth);
					(void)rmdir(mntpt);
					continue;
				} else if (statfs(mntpt, &statfsbuf)) {
					statfsbuf.f_mntonname[0] = '\0';
					prtstat(&statfsbuf, maxwidth);
				} else
					fprintf(stderr, "df: %s: %s\n",
					    *argv, strerror(errno));
				(void)unmount(mntpt, MNT_NOFORCE);
				(void)rmdir(mntpt);
				continue;
			}
		} else
			mntpt = *argv;
		/*
		 * Statfs does not take a `wait' flag, so we cannot
		 * implement nflag here.
		 */
		if (statfs(mntpt, &statfsbuf) < 0) {
			fprintf(stderr,
			    "df: %s: %s\n", mntpt, strerror(errno));
			continue;
		}
		if (argc == 1)
			maxwidth = strlen(statfsbuf.f_mntfromname) + 1;
		prtstat(&statfsbuf, maxwidth);
	}
	return (0);
}

char *
getmntpt(name)
	char *name;
{
	long mntsize, i;
	struct statfs *mntbuf;

	mntsize = getmntinfo(&mntbuf, (nflag ? MNT_NOWAIT : MNT_WAIT));
	for (i = 0; i < mntsize; i++) {
		if (!strcmp(mntbuf[i].f_mntfromname, name))
			return (mntbuf[i].f_mntonname);
	}
	return (0);
}

/*
 * Print out status about a filesystem.
 */
void
prtstat(sfsp, maxwidth)
	register struct statfs *sfsp;
	long maxwidth;
{
	static long blocksize;
	static int headerlen, timesthrough;
	static char *header;
	long used, availblks, inodes;

	if (maxwidth < 11)
		maxwidth = 11;
	if (++timesthrough == 1) {
		header = getbsize("df", &headerlen, &blocksize);
		(void)printf("%-*.*s %s    Used   Avail Capacity",
		    maxwidth, maxwidth, "Filesystem", header);
		if (iflag)
			(void)printf(" iused   ifree  %%iused");
		(void)printf("  Mounted on\n");
	}
	(void)printf("%-*.*s", maxwidth, maxwidth, sfsp->f_mntfromname);
	used = sfsp->f_blocks - sfsp->f_bfree;
	availblks = sfsp->f_bavail + used;
	(void)printf(" %*ld %7ld %7ld", headerlen,
	    (long)((double)sfsp->f_blocks * (double)sfsp->f_fsize / (double)blocksize),
	    (long)((double)used * (double)sfsp->f_fsize / (double)blocksize),
	    (long)((double)sfsp->f_bavail * (double)sfsp->f_fsize / (double)blocksize));
	(void)printf(" %5.0f%%",
	    availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
	if (iflag) {
		inodes = sfsp->f_files;
		used = inodes - sfsp->f_ffree;
		(void)printf(" %7ld %7ld %5.0f%% ", used, sfsp->f_ffree,
		   inodes == 0 ? 100.0 : (double)used / (double)inodes * 100.0);
	} else 
		(void)printf("  ");
	(void)printf("  %s\n", sfsp->f_mntonname);
}

/*
 * This code constitutes the old df code for extracting
 * information from filesystem superblocks.
 */
#include <ufs/fs.h>
#include <errno.h>
#include <fstab.h>

union {
	struct fs iu_fs;
	char dummy[SBSIZE];
} sb;
#define sblock sb.iu_fs

int	fi;

void
ufs_df(file, maxwidth)
	char *file;
	long maxwidth;
{
	struct statfs statfsbuf;
	register struct statfs *sfsp;
	char *mntpt;
	static int synced;

	if (synced++ == 0)
		sync();

	if ((fi = open(file, O_RDONLY)) < 0) {
		(void)fprintf(stderr, "df: %s: %s\n", file, strerror(errno));
		return;
	}
	if (bread((long)SBOFF, (char *)&sblock, SBSIZE) == 0) {
		(void)close(fi);
		return;
	}
	sfsp = &statfsbuf;
	sfsp->f_type = MOUNT_UFS;
	sfsp->f_flags = 0;
	sfsp->f_bsize = sblock.fs_fsize;
#ifdef notyet
	sfsp->f_iosize = sblock.fs_bsize;
#endif
	sfsp->f_blocks = sblock.fs_dsize;
	sfsp->f_bfree = sblock.fs_cstotal.cs_nbfree * sblock.fs_frag +
		sblock.fs_cstotal.cs_nffree;
	sfsp->f_bavail = (sblock.fs_dsize * (100 - sblock.fs_minfree) / 100) -
		(sblock.fs_dsize - sfsp->f_bfree);
	if (sfsp->f_bavail < 0)
		sfsp->f_bavail = 0;
	sfsp->f_files =  sblock.fs_ncg * sblock.fs_ipg;
	sfsp->f_ffree = sblock.fs_cstotal.cs_nifree;
	sfsp->f_fsid.val[0] = 0;
	sfsp->f_fsid.val[1] = 0;
	if ((mntpt = getmntpt(file)) == 0)
		mntpt = "";
	bcopy((caddr_t)mntpt, (caddr_t)&sfsp->f_mntonname[0], MNAMELEN);
	bcopy((caddr_t)file, (caddr_t)&sfsp->f_mntfromname[0], MNAMELEN);
	prtstat(sfsp, maxwidth);
	(void) close(fi);
}

int
bread(off, buf, cnt)
	long off;
	char *buf;
	int cnt;
{
	int n;

	(void) lseek(fi, off, SEEK_SET);
	if ((n=read(fi, buf, cnt)) != cnt) {
		/* probably a dismounted disk if errno == EIO */
		if (errno != EIO) {
			(void)printf("\nread error off = %ld\n", off);
			(void)printf("count = %d: %s\n", n, strerror(errno));
		}
		return (0);
	}
	return (1);
}

void
usage()
{
	(void)fprintf(stderr, "usage: df [-in] [file | file_system ...]\n");
	exit(1);
}
Commit	Line	Data
d958d4cb RG	1	/*
	2	* Copyright (c) UNIX System Laboratories, Inc. All or some portions
	3	* of this file are derived from material licensed to the
	4	* University of California by American Telephone and Telegraph Co.
	5	* or UNIX System Laboratories, Inc. and are reproduced herein with
	6	* the permission of UNIX System Laboratories, Inc.
	7	*
	8	* $Id$
	9	*/
15637ed4 RG	10	/*
	11	* Copyright (c) 1980, 1990 The Regents of the University of California.
	12	* All rights reserved.
	13	*
	14	* Redistribution and use in source and binary forms, with or without
	15	* modification, are permitted provided that the following conditions
	16	* are met:
	17	* 1. Redistributions of source code must retain the above copyright
	18	* notice, this list of conditions and the following disclaimer.
	19	* 2. Redistributions in binary form must reproduce the above copyright
	20	* notice, this list of conditions and the following disclaimer in the
	21	* documentation and/or other materials provided with the distribution.
	22	* 3. All advertising materials mentioning features or use of this software
	23	* must display the following acknowledgement:
	24	* This product includes software developed by the University of
	25	* California, Berkeley and its contributors.
	26	* 4. Neither the name of the University nor the names of its contributors
	27	* may be used to endorse or promote products derived from this software
	28	* without specific prior written permission.
	29	*
	30	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	31	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	32	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	33	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	34	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	35	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	36	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	37	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	38	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	39	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	40	* SUCH DAMAGE.
	41	*/
	42
	43	#ifndef lint
	44	char copyright[] =
	45	"@(#) Copyright (c) 1980, 1990 The Regents of the University of California.\n\
	46	All rights reserved.\n";
	47	#endif /* not lint */
	48
	49	#ifndef lint
4e97a0eb	50	static char sccsid[] = "@(#)df.c 5.30 (Berkeley) 4/23/92";
15637ed4 RG	51	#endif /* not lint */
15637ed4 RG	52
15637ed4 RG	53	#include <sys/param.h>
	54	#include <sys/stat.h>
	55	#include <sys/mount.h>
4e97a0eb	56	#include <errno.h>
15637ed4 RG	57	#include <fcntl.h>
	58	#include <stdio.h>
	59	#include <stdlib.h>
	60	#include <string.h>
	61	#include <unistd.h>
	62
4e97a0eb NW	63	int bread __P((long, char *, int));
	64	char getbsize __P((char , int , long ));
	65	char getmntpt __P((char ));
	66	void prtstat __P((struct statfs *, long));
	67	void ufs_df __P((char *, long));
	68	void usage __P((void));
	69
ad401f1c	70	int iflag, kflag, nflag;
15637ed4 RG	71	struct ufs_args mdev;
	72
	73	int
	74	main(argc, argv)
	75	int argc;
4e97a0eb	76	char *argv[];
15637ed4	77	{
15637ed4 RG	78	struct stat stbuf;
15637ed4 RG	79	struct statfs statfsbuf, *mntbuf;
4e97a0eb NW	80	long width, maxwidth, mntsize;
	81	int err, ch, i;
	82	char *mntpt;
15637ed4	83
ad401f1c NW	84	iflag = kflag = nflag = 0;
ad401f1c NW	85	while ((ch = getopt(argc, argv, "ikn")) != EOF)
15637ed4 RG	86	switch(ch) {
	87	case 'i':
	88	iflag = 1;
	89	break;
ad401f1c NW	90	case 'k':
	91	kflag = 1;
	92	break;
15637ed4 RG	93	case 'n':
	94	nflag = 1;
	95	break;
	96	case '?':
	97	default:
4e97a0eb	98	usage();
15637ed4 RG	99	}
	100	argc -= optind;
	101	argv += optind;
	102
	103	mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
	104	maxwidth = 0;
	105	for (i = 0; i < mntsize; i++) {
	106	width = strlen(mntbuf[i].f_mntfromname);
	107	if (width > maxwidth)
	108	maxwidth = width;
	109	}
	110	if (!*argv) {
	111	mntsize = getmntinfo(&mntbuf, (nflag ? MNT_NOWAIT : MNT_WAIT));
	112	for (i = 0; i < mntsize; i++)
	113	prtstat(&mntbuf[i], maxwidth);
	114	exit(0);
	115	}
	116	for (; *argv; argv++) {
	117	if (stat(*argv, &stbuf) < 0) {
	118	err = errno;
	119	if ((mntpt = getmntpt(*argv)) == 0) {
	120	fprintf(stderr, "df: %s: %s\n", *argv,
	121	strerror(err));
	122	continue;
	123	}
	124	} else if ((stbuf.st_mode & S_IFMT) == S_IFCHR) {
	125	ufs_df(*argv, maxwidth);
	126	continue;
	127	} else if ((stbuf.st_mode & S_IFMT) == S_IFBLK) {
	128	if ((mntpt = getmntpt(*argv)) == 0) {
	129	mntpt = mktemp(strdup("/tmp/df.XXXXXX"));
	130	mdev.fspec = *argv;
	131	if (mkdir(mntpt, DEFFILEMODE) != 0) {
	132	fprintf(stderr, "df: %s: %s\n",
	133	mntpt, strerror(errno));
	134	continue;
	135	}
	136	if (mount(MOUNT_UFS, mntpt, MNT_RDONLY,
	137	&mdev) != 0) {
	138	ufs_df(*argv, maxwidth);
	139	(void)rmdir(mntpt);
	140	continue;
	141	} else if (statfs(mntpt, &statfsbuf)) {
	142	statfsbuf.f_mntonname[0] = '\0';
	143	prtstat(&statfsbuf, maxwidth);
	144	} else
	145	fprintf(stderr, "df: %s: %s\n",
	146	*argv, strerror(errno));
	147	(void)unmount(mntpt, MNT_NOFORCE);
	148	(void)rmdir(mntpt);
	149	continue;
	150	}
	151	} else
	152	mntpt = *argv;
	153	/*
	154	* Statfs does not take a `wait' flag, so we cannot
	155	* implement nflag here.
	156	*/
	157	if (statfs(mntpt, &statfsbuf) < 0) {
	158	fprintf(stderr,
	159	"df: %s: %s\n", mntpt, strerror(errno));
	160	continue;
	161	}
	162	if (argc == 1)
163	maxwidth = strlen(statfsbuf.f_mntfromname) + 1;
164	prtstat(&statfsbuf, maxwidth);
165	}
166	return (0);
167	}
168
169	char *
170	getmntpt(name)
171	char *name;
172	{
173	long mntsize, i;
174	struct statfs *mntbuf;
175
176	mntsize = getmntinfo(&mntbuf, (nflag ? MNT_NOWAIT : MNT_WAIT));
177	for (i = 0; i < mntsize; i++) {
178	if (!strcmp(mntbuf[i].f_mntfromname, name))
179	return (mntbuf[i].f_mntonname);
180	}
181	return (0);
182	}
183
184	/*
185	* Print out status about a filesystem.
186	*/
187	void
188	prtstat(sfsp, maxwidth)
189	register struct statfs *sfsp;
190	long maxwidth;
191	{
4e97a0eb NW	192	static long blocksize;
	193	static int headerlen, timesthrough;
	194	static char *header;
15637ed4	195	long used, availblks, inodes;
15637ed4 RG	196
	197	if (maxwidth < 11)
	198	maxwidth = 11;
	199	if (++timesthrough == 1) {
4e97a0eb NW	200	header = getbsize("df", &headerlen, &blocksize);
	201	(void)printf("%-.s %s Used Avail Capacity",
	202	maxwidth, maxwidth, "Filesystem", header);
15637ed4	203	if (iflag)
4e97a0eb NW	204	(void)printf(" iused ifree %%iused");
4e97a0eb NW	205	(void)printf(" Mounted on\n");
15637ed4	206	}
4e97a0eb	207	(void)printf("%-.s", maxwidth, maxwidth, sfsp->f_mntfromname);
15637ed4 RG	208	used = sfsp->f_blocks - sfsp->f_bfree;
15637ed4 RG	209	availblks = sfsp->f_bavail + used;
4e97a0eb	210	(void)printf(" %*ld %7ld %7ld", headerlen,
96eb1fc1 SW	211	(long)((double)sfsp->f_blocks * (double)sfsp->f_fsize / (double)blocksize),
	212	(long)((double)used * (double)sfsp->f_fsize / (double)blocksize),
	213	(long)((double)sfsp->f_bavail * (double)sfsp->f_fsize / (double)blocksize));
4e97a0eb	214	(void)printf(" %5.0f%%",
15637ed4 RG	215	availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
	216	if (iflag) {
	217	inodes = sfsp->f_files;
	218	used = inodes - sfsp->f_ffree;
4e97a0eb	219	(void)printf(" %7ld %7ld %5.0f%% ", used, sfsp->f_ffree,
15637ed4 RG	220	inodes == 0 ? 100.0 : (double)used / (double)inodes * 100.0);
15637ed4 RG	221	} else
4e97a0eb NW	222	(void)printf(" ");
4e97a0eb NW	223	(void)printf(" %s\n", sfsp->f_mntonname);
15637ed4 RG	224	}
	225
	226	/*
	227	* This code constitutes the old df code for extracting
	228	* information from filesystem superblocks.
	229	*/
	230	#include <ufs/fs.h>
	231	#include <errno.h>
	232	#include <fstab.h>
	233
	234	union {
	235	struct fs iu_fs;
	236	char dummy[SBSIZE];
	237	} sb;
	238	#define sblock sb.iu_fs
	239
	240	int fi;
15637ed4 RG	241
	242	void
	243	ufs_df(file, maxwidth)
	244	char *file;
	245	long maxwidth;
	246	{
15637ed4 RG	247	struct statfs statfsbuf;
	248	register struct statfs *sfsp;
	249	char *mntpt;
	250	static int synced;
	251
	252	if (synced++ == 0)
	253	sync();
	254
	255	if ((fi = open(file, O_RDONLY)) < 0) {
4e97a0eb	256	(void)fprintf(stderr, "df: %s: %s\n", file, strerror(errno));
15637ed4 RG	257	return;
	258	}
	259	if (bread((long)SBOFF, (char *)&sblock, SBSIZE) == 0) {
4e97a0eb	260	(void)close(fi);
15637ed4 RG	261	return;
	262	}
	263	sfsp = &statfsbuf;
	264	sfsp->f_type = MOUNT_UFS;
	265	sfsp->f_flags = 0;
4e97a0eb NW	266	sfsp->f_bsize = sblock.fs_fsize;
	267	#ifdef notyet
	268	sfsp->f_iosize = sblock.fs_bsize;
	269	#endif
15637ed4 RG	270	sfsp->f_blocks = sblock.fs_dsize;
	271	sfsp->f_bfree = sblock.fs_cstotal.cs_nbfree * sblock.fs_frag +
	272	sblock.fs_cstotal.cs_nffree;
	273	sfsp->f_bavail = (sblock.fs_dsize * (100 - sblock.fs_minfree) / 100) -
	274	(sblock.fs_dsize - sfsp->f_bfree);
	275	if (sfsp->f_bavail < 0)
	276	sfsp->f_bavail = 0;
	277	sfsp->f_files = sblock.fs_ncg * sblock.fs_ipg;
	278	sfsp->f_ffree = sblock.fs_cstotal.cs_nifree;
	279	sfsp->f_fsid.val[0] = 0;
	280	sfsp->f_fsid.val[1] = 0;
	281	if ((mntpt = getmntpt(file)) == 0)
	282	mntpt = "";
	283	bcopy((caddr_t)mntpt, (caddr_t)&sfsp->f_mntonname[0], MNAMELEN);
	284	bcopy((caddr_t)file, (caddr_t)&sfsp->f_mntfromname[0], MNAMELEN);
	285	prtstat(sfsp, maxwidth);
	286	(void) close(fi);
	287	}
	288
15637ed4 RG	289	int
	290	bread(off, buf, cnt)
	291	long off;
	292	char *buf;
	293	int cnt;
	294	{
	295	int n;
15637ed4 RG	296
	297	(void) lseek(fi, off, SEEK_SET);
	298	if ((n=read(fi, buf, cnt)) != cnt) {
	299	/* probably a dismounted disk if errno == EIO */
	300	if (errno != EIO) {
4e97a0eb NW	301	(void)printf("\nread error off = %ld\n", off);
4e97a0eb NW	302	(void)printf("count = %d: %s\n", n, strerror(errno));
15637ed4 RG	303	}
	304	return (0);
	305	}
	306	return (1);
	307	}
4e97a0eb NW	308
	309	void
	310	usage()
	311	{
	312	(void)fprintf(stderr, "usage: df [-in] [file \| file_system ...]\n");
	313	exit(1);
	314	}