[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	5.15 (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, nflag;
#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, "ikon")) != EOF)
		switch(ch) {
		case 'i':
			iflag = 1;
			break;
		case 'k':
			kflag = 1;
			break;
		case 'n':
			nflag = 1;
			break;
#ifdef COMPAT_43
		case 'o':
			oflag = 1;
			break;
#endif /* COMPAT_43 */
		case '?':
		default:
			fprintf(stderr,
			    "usage: df [-ikn] [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, (nflag ? MNT_NOWAIT : MNT_WAIT));
		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("/tmp/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)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;
		}
		prtstat(&statfsbuf);
	}
	exit(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.
 */
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
93e6cf82	25	static char sccsid[] = "@(#)df.c 5.15 (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();
93e6cf82	40	int iflag, kflag, nflag;
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
93e6cf82	57	while ((ch = getopt(argc, argv, "ikon")) != 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;
93e6cf82 KM	65	case 'n':
	66	nflag = 1;
	67	break;
704aadd2 KM	68	#ifdef COMPAT_43
704aadd2 KM	69	case 'o':
fc2797e7	70	oflag = 1;
704aadd2 KM	71	break;
704aadd2 KM	72	#endif /* COMPAT_43 */
dbdc06d4	73	case '?':
8a7d0cad	74	default:
fc2797e7	75	fprintf(stderr,
93e6cf82	76	"usage: df [-ikn] [file \| file_system ...]\n");
dbdc06d4	77	exit(1);
8a7d0cad	78	}
dbdc06d4 KB	79	argc -= optind;
	80	argv += optind;
	81
fc2797e7 KB	82	printf("Filesystem %s used avail capacity",
fc2797e7 KB	83	kflag ? " kbytes" : "512-blks");
704aadd2 KM	84	if (iflag)
	85	printf(" iused ifree %%iused");
	86	printf(" Mounted on\n");
	87	#ifdef COMPAT_43
	88	if (oflag) {
	89	olddf(argv);
	90	exit(0);
	91	}
	92	#endif /* COMPAT_43 */
	93	if (!*argv) {
93e6cf82	94	mntsize = getmntinfo(&mntbuf, (nflag ? MNT_NOWAIT : MNT_WAIT));
704aadd2 KM	95	for (i = 0; i < mntsize; i++)
	96	prtstat(&mntbuf[i]);
	97	exit(0);
	98	}
	99	for (; *argv; argv++) {
1e568652	100	if (stat(*argv, &stbuf) < 0) {
cf537218 KM	101	err = errno;
cf537218 KM	102	if ((mntpt = getmntpt(*argv)) == 0) {
fc2797e7 KB	103	fprintf(stderr, "df: %s: %s\n", *argv,
fc2797e7 KB	104	strerror(err));
1e568652	105	continue;
cf537218	106	}
1e568652 KM	107	} else if ((stbuf.st_mode & S_IFMT) == S_IFBLK) {
1e568652 KM	108	if ((mntpt = getmntpt(*argv)) == 0)
93e6cf82	109	mntpt = mktemp("/tmp/df.XXXXXX");
439847aa KM	110	mdev.fspec = *argv;
	111	if (!mkdir(mntpt) &&
	112	!mount(MOUNT_UFS, mntpt, M_RDONLY, &mdev) &&
	113	!statfs(mntpt, &statfsbuf)) {
	114	statfsbuf.f_mntonname[0] = '\0';
	115	prtstat(&statfsbuf);
fc2797e7 KB	116	} else
	117	fprintf(stderr, "df: %s: %s\n",
	118	*argv, strerror(errno));
adc92dc2	119	(void)unmount(mntpt, MNT_NOFORCE);
fc2797e7	120	(void)rmdir(mntpt);
1e568652 KM	121	continue;
	122	} else
	123	mntpt = *argv;
93e6cf82 KM	124	/*
	125	* Statfs does not take a `wait' flag, so we cannot
	126	* implement nflag here.
	127	*/
1e568652	128	if (statfs(mntpt, &statfsbuf) < 0) {
fc2797e7 KB	129	fprintf(stderr,
fc2797e7 KB	130	"df: %s: %s\n", mntpt, strerror(errno));
704aadd2 KM	131	continue;
	132	}
	133	prtstat(&statfsbuf);
	134	}
	135	exit(0);
	136	}
	137
1e568652 KM	138	char *
	139	getmntpt(name)
	140	char *name;
	141	{
	142	long mntsize, i;
	143	struct statfs *mntbuf;
	144
93e6cf82	145	mntsize = getmntinfo(&mntbuf, (nflag ? MNT_NOWAIT : MNT_WAIT));
1e568652 KM	146	for (i = 0; i < mntsize; i++) {
	147	if (!strcmp(mntbuf[i].f_mntfromname, name))
	148	return (mntbuf[i].f_mntonname);
	149	}
	150	return (0);
	151	}
	152
704aadd2 KM	153	/*
	154	* Print out status about a filesystem.
	155	*/
	156	prtstat(sfsp)
	157	register struct statfs *sfsp;
	158	{
	159	long used, availblks, inodes;
	160
	161	printf("%-12.12s", sfsp->f_mntfromname);
	162	used = sfsp->f_blocks - sfsp->f_bfree;
	163	availblks = sfsp->f_bavail + used;
fc2797e7 KB	164	printf("%8ld%8ld%8ld",
	165	sfsp->f_blocks * sfsp->f_fsize / (kflag ? 1024 : 512),
	166	used * sfsp->f_fsize / (kflag ? 1024 : 512),
	167	sfsp->f_bavail * sfsp->f_fsize / (kflag ? 1024 : 512));
704aadd2 KM	168	printf("%6.0f%%",
	169	availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
	170	if (iflag) {
	171	inodes = sfsp->f_files;
	172	used = inodes - sfsp->f_ffree;
	173	printf("%8ld%8ld%6.0f%% ", used, sfsp->f_ffree,
	174	inodes == 0 ? 100.0 : (double)used / (double)inodes * 100.0);
	175	} else
	176	printf(" ");
	177	printf(" %s\n", sfsp->f_mntonname);
	178	}
	179
	180	#ifdef COMPAT_43
	181	/*
	182	* This code constitutes the old df code for extracting
	183	* information from filesystem superblocks.
	184	*/
704aadd2	185	#include <ufs/fs.h>
704aadd2 KM	186	#include <errno.h>
704aadd2 KM	187	#include <fstab.h>
704aadd2	188
fc2797e7	189	char root[MAXPATHLEN];
704aadd2 KM	190
	191	union {
	192	struct fs iu_fs;
	193	char dummy[SBSIZE];
	194	} sb;
	195	#define sblock sb.iu_fs
	196
	197	int fi;
	198	char *strcpy();
	199
	200	olddf(argv)
	201	char *argv[];
	202	{
	203	struct fstab *fsp;
704aadd2	204
dda19894	205	sync();
dbdc06d4	206	if (!*argv) {
8d335f7d	207	if (setfsent() == 0)
3b72df1c	208	perror(_PATH_FSTAB), exit(1);
a98f5f82	209	while (fsp = getfsent()) {
1f65a82f	210	if (strcmp(fsp->fs_type, FSTAB_RW) &&
351ef297 SL	211	strcmp(fsp->fs_type, FSTAB_RO) &&
351ef297 SL	212	strcmp(fsp->fs_type, FSTAB_RQ))
f0861f40	213	continue;
c7b72342	214	if (root[0] == 0)
f4d092e2	215	(void) strcpy(root, fsp->fs_spec);
a98f5f82	216	dfree(fsp->fs_spec, 1);
c7b72342	217	}
6c5c8ac3	218	(void)endfsent();
c7b72342 BJ	219	exit(0);
c7b72342 BJ	220	}
dbdc06d4 KB	221	while (*argv)
dbdc06d4 KB	222	dfree(*argv++, 0);
704aadd2	223	exit(0);
c7b72342 BJ	224	}
c7b72342 BJ	225
a98f5f82 BJ	226	dfree(file, infsent)
	227	char *file;
	228	int infsent;
c7b72342	229	{
dbdc06d4	230	extern int errno;
a98f5f82	231	struct stat stbuf;
704aadd2 KM	232	struct statfs statfsbuf;
704aadd2 KM	233	register struct statfs *sfsp;
a98f5f82	234	struct fstab *fsp;
fc2797e7	235	char *mntpt;
a98f5f82 BJ	236
	237	if (stat(file, &stbuf) == 0 &&
	238	(stbuf.st_mode&S_IFMT) != S_IFCHR &&
	239	(stbuf.st_mode&S_IFMT) != S_IFBLK) {
	240	if (infsent) {
fc2797e7	241	fprintf(stderr, "df: %s: screwy fstab entry\n", file);
8d335f7d BJ	242	return;
8d335f7d BJ	243	}
6c5c8ac3	244	(void)setfsent();
a98f5f82 BJ	245	while (fsp = getfsent()) {
	246	struct stat stb;
	247
	248	if (stat(fsp->fs_spec, &stb) == 0 &&
	249	stb.st_rdev == stbuf.st_dev) {
	250	file = fsp->fs_spec;
6c5c8ac3	251	(void)endfsent();
a98f5f82 BJ	252	goto found;
	253	}
	254	}
6c5c8ac3	255	(void)endfsent();
fc2797e7	256	fprintf(stderr, "df: %s: mounted on unknown device\n", file);
a98f5f82	257	return;
8d335f7d	258	}
a98f5f82	259	found:
fc2797e7	260	if ((fi = open(file, O_RDONLY)) < 0) {
dbdc06d4	261	fprintf(stderr, "df: %s: %s\n", file, strerror(errno));
c7b72342 BJ	262	return;
c7b72342 BJ	263	}
6c5c8ac3	264	if (bread((long)SBOFF, (char *)&sblock, SBSIZE) == 0) {
f5064bf4 RC	265	(void) close(fi);
	266	return;
	267	}
704aadd2 KM	268	sfsp = &statfsbuf;
	269	sfsp->f_type = MOUNT_UFS;
	270	sfsp->f_flags = 0;
	271	sfsp->f_fsize = sblock.fs_fsize;
	272	sfsp->f_bsize = sblock.fs_bsize;
	273	sfsp->f_blocks = sblock.fs_dsize;
	274	sfsp->f_bfree = sblock.fs_cstotal.cs_nbfree * sblock.fs_frag +
	275	sblock.fs_cstotal.cs_nffree;
	276	sfsp->f_bavail = (sblock.fs_dsize * (100 - sblock.fs_minfree) / 100) -
	277	(sblock.fs_dsize - sfsp->f_bfree);
	278	if (sfsp->f_bavail < 0)
	279	sfsp->f_bavail = 0;
	280	sfsp->f_files = sblock.fs_ncg * sblock.fs_ipg;
	281	sfsp->f_ffree = sblock.fs_cstotal.cs_nifree;
	282	sfsp->f_fsid.val[0] = 0;
	283	sfsp->f_fsid.val[1] = 0;
1e568652 KM	284	if ((mntpt = getmntpt(file)) == 0)
	285	mntpt = "";
	286	bcopy((caddr_t)mntpt, (caddr_t)&sfsp->f_mntonname[0], MNAMELEN);
704aadd2 KM	287	bcopy((caddr_t)file, (caddr_t)&sfsp->f_mntfromname[0], MNAMELEN);
704aadd2 KM	288	prtstat(sfsp);
f4d092e2	289	(void) close(fi);
c7b72342 BJ	290	}
c7b72342 BJ	291
f4d092e2 KM	292	long lseek();
f4d092e2 KM	293
6c5c8ac3 KM	294	bread(off, buf, cnt)
6c5c8ac3 KM	295	long off;
a98f5f82	296	char *buf;
c7b72342 BJ	297	{
	298	int n;
	299	extern errno;
	300
fc2797e7	301	(void) lseek(fi, off, SEEK_SET);
a98f5f82	302	if ((n=read(fi, buf, cnt)) != cnt) {
f5064bf4 RC	303	/* probably a dismounted disk if errno == EIO */
f5064bf4 RC	304	if (errno != EIO) {
6c5c8ac3	305	printf("\nread error off = %ld\n", off);
f5064bf4 RC	306	printf("count = %d; errno = %d\n", n, errno);
	307	}
	308	return (0);
c7b72342	309	}
f5064bf4	310	return (1);
c7b72342	311	}
704aadd2	312	#endif /* COMPAT_43 */