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

/*
 * 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, 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;

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