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

/*
 * Copyright (c) 1980 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

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

#ifndef lint
static char sccsid[] = "@(#)df.c	5.12 (Berkeley) %G%";
#endif /* not lint */

/*
 * df
 */
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/mount.h>
#include <sys/file.h>
#include <stdio.h>
#include <strings.h>
#include <unistd.h>

char	*getmntpt();
int	iflag, kflag;
#ifdef COMPAT_43
int	oflag;
#endif /* COMPAT_43 */

main(argc, argv)
	int argc;
	char **argv;
{
	extern int errno, optind;
	int err, ch, i;
	long mntsize, getmntinfo();
	char *mntpt, *mktemp();
	struct stat stbuf;
	struct statfs statfsbuf, *mntbuf;
	struct ufs_args mdev;

	while ((ch = getopt(argc, argv, "iko")) != EOF)
		switch(ch) {
		case 'i':
			iflag = 1;
			break;
		case 'k':
			kflag = 1;
			break;
#ifdef COMPAT_43
		case 'o':
			oflag = 1;
			break;
#endif /* COMPAT_43 */
		case '?':
		default:
			fprintf(stderr,
			    "usage: df [-ik] [file | file_system ...]\n");
			exit(1);
		}
	argc -= optind;
	argv += optind;

	printf("Filesystem  %s    used   avail capacity",
	    kflag ? "  kbytes" : "512-blks");
	if (iflag)
		printf(" iused   ifree  %%iused");
	printf("  Mounted on\n");
#ifdef COMPAT_43
	if (oflag) {
		olddf(argv);
		exit(0);
	}
#endif /* COMPAT_43 */
	if (!*argv) {
		mntsize = getmntinfo(&mntbuf);
		for (i = 0; i < mntsize; i++)
			prtstat(&mntbuf[i]);
		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_IFBLK) {
			if ((mntpt = getmntpt(*argv)) == 0)
				mntpt = mktemp("/df.XXXXXX");
				mdev.fspec = *argv;
				if (!mkdir(mntpt) &&
				    !mount(MOUNT_UFS, mntpt, M_RDONLY, &mdev) &&
				    !statfs(mntpt, &statfsbuf)) {
					statfsbuf.f_mntonname[0] = '\0';
					prtstat(&statfsbuf);
				} else
					fprintf(stderr, "df: %s: %s\n",
					    *argv, strerror(errno));
				(void)umount(mntpt, MNT_NOFORCE);
				(void)rmdir(mntpt);
				continue;
		} else
			mntpt = *argv;
		if (statfs(mntpt, &statfsbuf) < 0) {
			fprintf(stderr,
			    "df: %s: %s\n", mntpt, strerror(errno));
			continue;
		}
		prtstat(&statfsbuf);
	}
	exit(0);
}

long
getmntinfo(mntbufp)
	struct statfs **mntbufp;
{
	int i;
	static long mntsize;
	static struct statfs *mntbuf = 0;
	char *malloc();

	if (mntbuf) {
		*mntbufp = mntbuf;
		return (mntsize);
	}
	if ((mntsize = getfsstat((struct statfs *)0, 0)) < 0) {
		perror("df");
		exit(1);
	}
	mntbuf = 0;
	do {
		if (mntbuf)
			free((char *)mntbuf);
		i = (mntsize + 1) * sizeof(struct statfs);
		if ((mntbuf = (struct statfs *)malloc((unsigned)i)) == 0) {
			fprintf(stderr,
			    "df: no space for mount table buffer\n");
			exit(1);
		}
		if ((mntsize = getfsstat(mntbuf, i)) < 0) {
			perror("df");
			exit(1);
		}
	} while (i == mntsize * sizeof(struct statfs));
	*mntbufp = mntbuf;
	return (mntsize);
}

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

	mntsize = getmntinfo(&mntbuf);
	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.
 */
prtstat(sfsp)
	register struct statfs *sfsp;
{
	long used, availblks, inodes;

	printf("%-12.12s", sfsp->f_mntfromname);
	used = sfsp->f_blocks - sfsp->f_bfree;
	availblks = sfsp->f_bavail + used;
	printf("%8ld%8ld%8ld",
	    sfsp->f_blocks * sfsp->f_fsize / (kflag ? 1024 : 512),
	    used * sfsp->f_fsize / (kflag ? 1024 : 512),
	    sfsp->f_bavail * sfsp->f_fsize / (kflag ? 1024 : 512));
	printf("%6.0f%%",
	    availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
	if (iflag) {
		inodes = sfsp->f_files;
		used = inodes - sfsp->f_ffree;
		printf("%8ld%8ld%6.0f%% ", used, sfsp->f_ffree,
		   inodes == 0 ? 100.0 : (double)used / (double)inodes * 100.0);
	} else 
		printf("  ");
	printf("  %s\n", sfsp->f_mntonname);
}

#ifdef COMPAT_43
/*
 * This code constitutes the old df code for extracting
 * information from filesystem superblocks.
 */
#include <ufs/fs.h>
#include <errno.h>
#include <fstab.h>

char	root[MAXPATHLEN];

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

int	fi;
char	*strcpy();

olddf(argv)
	char *argv[];
{
	struct fstab *fsp;

	sync();
	if (!*argv) {
		if (setfsent() == 0)
			perror(_PATH_FSTAB), exit(1);
		while (fsp = getfsent()) {
			if (strcmp(fsp->fs_type, FSTAB_RW) &&
			    strcmp(fsp->fs_type, FSTAB_RO) &&
			    strcmp(fsp->fs_type, FSTAB_RQ))
				continue;
			if (root[0] == 0)
				(void) strcpy(root, fsp->fs_spec);
			dfree(fsp->fs_spec, 1);
		}
		(void)endfsent();
		exit(0);
	}
	while (*argv)
		dfree(*argv++, 0);
	exit(0);
}

dfree(file, infsent)
	char *file;
	int infsent;
{
	extern int errno;
	struct stat stbuf;
	struct statfs statfsbuf;
	register struct statfs *sfsp;
	struct fstab *fsp;
	char *mntpt;

	if (stat(file, &stbuf) == 0 &&
	    (stbuf.st_mode&S_IFMT) != S_IFCHR &&
	    (stbuf.st_mode&S_IFMT) != S_IFBLK) {
		if (infsent) {
			fprintf(stderr, "df: %s: screwy fstab entry\n", file);
			return;
		}
		(void)setfsent();
		while (fsp = getfsent()) {
			struct stat stb;

			if (stat(fsp->fs_spec, &stb) == 0 &&
			    stb.st_rdev == stbuf.st_dev) {
				file = fsp->fs_spec;
				(void)endfsent();
				goto found;
			}
		}
		(void)endfsent();
		fprintf(stderr, "df: %s: mounted on unknown device\n", file);
		return;
	}
found:
	if ((fi = open(file, O_RDONLY)) < 0) {
		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_fsize = sblock.fs_fsize;
	sfsp->f_bsize = sblock.fs_bsize;
	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);
	(void) close(fi);
}

long lseek();

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

	(void) lseek(fi, off, SEEK_SET);
	if ((n=read(fi, buf, cnt)) != cnt) {
		/* probably a dismounted disk if errno == EIO */
		if (errno != EIO) {
			printf("\nread error off = %ld\n", off);
			printf("count = %d; errno = %d\n", n, errno);
		}
		return (0);
	}
	return (1);
}
#endif /* COMPAT_43 */
Commit	Line	Data
bcf1365c	1	/*
704aadd2 KM	2	* Copyright (c) 1980 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms are permitted
	6	* provided that the above copyright notice and this paragraph are
	7	* duplicated in all such forms and that any documentation,
	8	* advertising materials, and other materials related to such
	9	* distribution and use acknowledge that the software was developed
	10	* by the University of California, Berkeley. The name of the
	11	* University may not be used to endorse or promote products derived
	12	* from this software without specific prior written permission.
	13	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
	14	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
	15	* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
bcf1365c DF	16	*/
	17
	18	#ifndef lint
	19	char copyright[] =
704aadd2	20	"@(#) Copyright (c) 1980 The Regents of the University of California.\n\
bcf1365c	21	All rights reserved.\n";
7e8aa4e0	22	#endif /* not lint */
bcf1365c	23
97dd7000	24	#ifndef lint
24e81b44	25	static char sccsid[] = "@(#)df.c 5.12 (Berkeley) %G%";
7e8aa4e0	26	#endif /* not lint */
a98f5f82	27
8d335f7d BJ	28	/*
	29	* df
	30	*/
fc2797e7	31	#include <sys/param.h>
1e568652	32	#include <sys/stat.h>
704aadd2	33	#include <sys/mount.h>
fc2797e7 KB	34	#include <sys/file.h>
	35	#include <stdio.h>
	36	#include <strings.h>
	37	#include <unistd.h>
c7b72342	38
1e568652	39	char *getmntpt();
fc2797e7	40	int iflag, kflag;
704aadd2 KM	41	#ifdef COMPAT_43
	42	int oflag;
	43	#endif /* COMPAT_43 */
c7b72342 BJ	44
c7b72342 BJ	45	main(argc, argv)
a98f5f82 BJ	46	int argc;
a98f5f82 BJ	47	char **argv;
c7b72342	48	{
dbdc06d4	49	extern int errno, optind;
cf537218	50	int err, ch, i;
fc2797e7 KB	51	long mntsize, getmntinfo();
fc2797e7 KB	52	char mntpt, mktemp();
1e568652	53	struct stat stbuf;
704aadd2	54	struct statfs statfsbuf, *mntbuf;
439847aa	55	struct ufs_args mdev;
c7b72342	56
fc2797e7	57	while ((ch = getopt(argc, argv, "iko")) != EOF)
dbdc06d4	58	switch(ch) {
8a7d0cad	59	case 'i':
fc2797e7 KB	60	iflag = 1;
	61	break;
	62	case 'k':
	63	kflag = 1;
8a7d0cad	64	break;
704aadd2 KM	65	#ifdef COMPAT_43
704aadd2 KM	66	case 'o':
fc2797e7	67	oflag = 1;
704aadd2 KM	68	break;
704aadd2 KM	69	#endif /* COMPAT_43 */
dbdc06d4	70	case '?':
8a7d0cad	71	default:
fc2797e7 KB	72	fprintf(stderr,
fc2797e7 KB	73	"usage: df [-ik] [file \| file_system ...]\n");
dbdc06d4	74	exit(1);
8a7d0cad	75	}
dbdc06d4 KB	76	argc -= optind;
	77	argv += optind;
	78
fc2797e7 KB	79	printf("Filesystem %s used avail capacity",
fc2797e7 KB	80	kflag ? " kbytes" : "512-blks");
704aadd2 KM	81	if (iflag)
	82	printf(" iused ifree %%iused");
	83	printf(" Mounted on\n");
	84	#ifdef COMPAT_43
	85	if (oflag) {
	86	olddf(argv);
	87	exit(0);
	88	}
	89	#endif /* COMPAT_43 */
	90	if (!*argv) {
1e568652	91	mntsize = getmntinfo(&mntbuf);
704aadd2 KM	92	for (i = 0; i < mntsize; i++)
	93	prtstat(&mntbuf[i]);
	94	exit(0);
	95	}
	96	for (; *argv; argv++) {
1e568652	97	if (stat(*argv, &stbuf) < 0) {
cf537218 KM	98	err = errno;
cf537218 KM	99	if ((mntpt = getmntpt(*argv)) == 0) {
fc2797e7 KB	100	fprintf(stderr, "df: %s: %s\n", *argv,
fc2797e7 KB	101	strerror(err));
1e568652	102	continue;
cf537218	103	}
1e568652 KM	104	} else if ((stbuf.st_mode & S_IFMT) == S_IFBLK) {
1e568652 KM	105	if ((mntpt = getmntpt(*argv)) == 0)
fc2797e7	106	mntpt = mktemp("/df.XXXXXX");
439847aa KM	107	mdev.fspec = *argv;
	108	if (!mkdir(mntpt) &&
	109	!mount(MOUNT_UFS, mntpt, M_RDONLY, &mdev) &&
	110	!statfs(mntpt, &statfsbuf)) {
	111	statfsbuf.f_mntonname[0] = '\0';
	112	prtstat(&statfsbuf);
fc2797e7 KB	113	} else
	114	fprintf(stderr, "df: %s: %s\n",
	115	*argv, strerror(errno));
	116	(void)umount(mntpt, MNT_NOFORCE);
	117	(void)rmdir(mntpt);
1e568652 KM	118	continue;
	119	} else
	120	mntpt = *argv;
	121	if (statfs(mntpt, &statfsbuf) < 0) {
fc2797e7 KB	122	fprintf(stderr,
fc2797e7 KB	123	"df: %s: %s\n", mntpt, strerror(errno));
704aadd2 KM	124	continue;
	125	}
	126	prtstat(&statfsbuf);
	127	}
	128	exit(0);
	129	}
	130
fc2797e7	131	long
1e568652 KM	132	getmntinfo(mntbufp)
	133	struct statfs **mntbufp;
	134	{
	135	int i;
	136	static long mntsize;
	137	static struct statfs *mntbuf = 0;
	138	char *malloc();
	139
	140	if (mntbuf) {
	141	*mntbufp = mntbuf;
	142	return (mntsize);
	143	}
	144	if ((mntsize = getfsstat((struct statfs *)0, 0)) < 0) {
	145	perror("df");
	146	exit(1);
	147	}
	148	mntbuf = 0;
	149	do {
	150	if (mntbuf)
	151	free((char *)mntbuf);
	152	i = (mntsize + 1) * sizeof(struct statfs);
	153	if ((mntbuf = (struct statfs *)malloc((unsigned)i)) == 0) {
	154	fprintf(stderr,
fc2797e7	155	"df: no space for mount table buffer\n");
1e568652 KM	156	exit(1);
	157	}
	158	if ((mntsize = getfsstat(mntbuf, i)) < 0) {
	159	perror("df");
	160	exit(1);
	161	}
	162	} while (i == mntsize * sizeof(struct statfs));
	163	*mntbufp = mntbuf;
	164	return (mntsize);
	165	}
	166
	167	char *
	168	getmntpt(name)
	169	char *name;
	170	{
	171	long mntsize, i;
	172	struct statfs *mntbuf;
	173
	174	mntsize = getmntinfo(&mntbuf);
	175	for (i = 0; i < mntsize; i++) {
	176	if (!strcmp(mntbuf[i].f_mntfromname, name))
	177	return (mntbuf[i].f_mntonname);
	178	}
	179	return (0);
	180	}
	181
704aadd2 KM	182	/*
	183	* Print out status about a filesystem.
	184	*/
	185	prtstat(sfsp)
	186	register struct statfs *sfsp;
	187	{
	188	long used, availblks, inodes;
	189
	190	printf("%-12.12s", sfsp->f_mntfromname);
	191	used = sfsp->f_blocks - sfsp->f_bfree;
	192	availblks = sfsp->f_bavail + used;
fc2797e7 KB	193	printf("%8ld%8ld%8ld",
	194	sfsp->f_blocks * sfsp->f_fsize / (kflag ? 1024 : 512),
	195	used * sfsp->f_fsize / (kflag ? 1024 : 512),
	196	sfsp->f_bavail * sfsp->f_fsize / (kflag ? 1024 : 512));
704aadd2 KM	197	printf("%6.0f%%",
	198	availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
	199	if (iflag) {
	200	inodes = sfsp->f_files;
	201	used = inodes - sfsp->f_ffree;
	202	printf("%8ld%8ld%6.0f%% ", used, sfsp->f_ffree,
	203	inodes == 0 ? 100.0 : (double)used / (double)inodes * 100.0);
	204	} else
	205	printf(" ");
	206	printf(" %s\n", sfsp->f_mntonname);
	207	}
	208
	209	#ifdef COMPAT_43
	210	/*
	211	* This code constitutes the old df code for extracting
	212	* information from filesystem superblocks.
	213	*/
704aadd2	214	#include <ufs/fs.h>
704aadd2 KM	215	#include <errno.h>
704aadd2 KM	216	#include <fstab.h>
704aadd2	217
fc2797e7	218	char root[MAXPATHLEN];
704aadd2 KM	219
	220	union {
	221	struct fs iu_fs;
	222	char dummy[SBSIZE];
	223	} sb;
	224	#define sblock sb.iu_fs
	225
	226	int fi;
	227	char *strcpy();
	228
	229	olddf(argv)
	230	char *argv[];
	231	{
	232	struct fstab *fsp;
704aadd2	233
dda19894	234	sync();
dbdc06d4	235	if (!*argv) {
8d335f7d	236	if (setfsent() == 0)
3b72df1c	237	perror(_PATH_FSTAB), exit(1);
a98f5f82	238	while (fsp = getfsent()) {
1f65a82f	239	if (strcmp(fsp->fs_type, FSTAB_RW) &&
351ef297 SL	240	strcmp(fsp->fs_type, FSTAB_RO) &&
351ef297 SL	241	strcmp(fsp->fs_type, FSTAB_RQ))
f0861f40	242	continue;
c7b72342	243	if (root[0] == 0)
f4d092e2	244	(void) strcpy(root, fsp->fs_spec);
a98f5f82	245	dfree(fsp->fs_spec, 1);
c7b72342	246	}
6c5c8ac3	247	(void)endfsent();
c7b72342 BJ	248	exit(0);
c7b72342 BJ	249	}
dbdc06d4 KB	250	while (*argv)
dbdc06d4 KB	251	dfree(*argv++, 0);
704aadd2	252	exit(0);
c7b72342 BJ	253	}
c7b72342 BJ	254
a98f5f82 BJ	255	dfree(file, infsent)
	256	char *file;
	257	int infsent;
c7b72342	258	{
dbdc06d4	259	extern int errno;
a98f5f82	260	struct stat stbuf;
704aadd2 KM	261	struct statfs statfsbuf;
704aadd2 KM	262	register struct statfs *sfsp;
a98f5f82	263	struct fstab *fsp;
fc2797e7	264	char *mntpt;
a98f5f82 BJ	265
	266	if (stat(file, &stbuf) == 0 &&
	267	(stbuf.st_mode&S_IFMT) != S_IFCHR &&
	268	(stbuf.st_mode&S_IFMT) != S_IFBLK) {
	269	if (infsent) {
fc2797e7	270	fprintf(stderr, "df: %s: screwy fstab entry\n", file);
8d335f7d BJ	271	return;
8d335f7d BJ	272	}
6c5c8ac3	273	(void)setfsent();
a98f5f82 BJ	274	while (fsp = getfsent()) {
	275	struct stat stb;
	276
	277	if (stat(fsp->fs_spec, &stb) == 0 &&
	278	stb.st_rdev == stbuf.st_dev) {
	279	file = fsp->fs_spec;
6c5c8ac3	280	(void)endfsent();
a98f5f82 BJ	281	goto found;
	282	}
	283	}
6c5c8ac3	284	(void)endfsent();
fc2797e7	285	fprintf(stderr, "df: %s: mounted on unknown device\n", file);
a98f5f82	286	return;
8d335f7d	287	}
a98f5f82	288	found:
fc2797e7	289	if ((fi = open(file, O_RDONLY)) < 0) {
dbdc06d4	290	fprintf(stderr, "df: %s: %s\n", file, strerror(errno));
c7b72342 BJ	291	return;
c7b72342 BJ	292	}
6c5c8ac3	293	if (bread((long)SBOFF, (char *)&sblock, SBSIZE) == 0) {
f5064bf4 RC	294	(void) close(fi);
	295	return;
	296	}
704aadd2 KM	297	sfsp = &statfsbuf;
	298	sfsp->f_type = MOUNT_UFS;
	299	sfsp->f_flags = 0;
	300	sfsp->f_fsize = sblock.fs_fsize;
	301	sfsp->f_bsize = sblock.fs_bsize;
	302	sfsp->f_blocks = sblock.fs_dsize;
	303	sfsp->f_bfree = sblock.fs_cstotal.cs_nbfree * sblock.fs_frag +
	304	sblock.fs_cstotal.cs_nffree;
	305	sfsp->f_bavail = (sblock.fs_dsize * (100 - sblock.fs_minfree) / 100) -
	306	(sblock.fs_dsize - sfsp->f_bfree);
	307	if (sfsp->f_bavail < 0)
	308	sfsp->f_bavail = 0;
	309	sfsp->f_files = sblock.fs_ncg * sblock.fs_ipg;
	310	sfsp->f_ffree = sblock.fs_cstotal.cs_nifree;
	311	sfsp->f_fsid.val[0] = 0;
	312	sfsp->f_fsid.val[1] = 0;
1e568652 KM	313	if ((mntpt = getmntpt(file)) == 0)
	314	mntpt = "";
	315	bcopy((caddr_t)mntpt, (caddr_t)&sfsp->f_mntonname[0], MNAMELEN);
704aadd2 KM	316	bcopy((caddr_t)file, (caddr_t)&sfsp->f_mntfromname[0], MNAMELEN);
704aadd2 KM	317	prtstat(sfsp);
f4d092e2	318	(void) close(fi);
c7b72342 BJ	319	}
c7b72342 BJ	320
f4d092e2 KM	321	long lseek();
f4d092e2 KM	322
6c5c8ac3 KM	323	bread(off, buf, cnt)
6c5c8ac3 KM	324	long off;
a98f5f82	325	char *buf;
c7b72342 BJ	326	{
	327	int n;
	328	extern errno;
	329
fc2797e7	330	(void) lseek(fi, off, SEEK_SET);
a98f5f82	331	if ((n=read(fi, buf, cnt)) != cnt) {
f5064bf4 RC	332	/* probably a dismounted disk if errno == EIO */
f5064bf4 RC	333	if (errno != EIO) {
6c5c8ac3	334	printf("\nread error off = %ld\n", off);
f5064bf4 RC	335	printf("count = %d; errno = %d\n", n, errno);
	336	}
	337	return (0);
c7b72342	338	}
f5064bf4	339	return (1);
c7b72342	340	}
704aadd2	341	#endif /* COMPAT_43 */