[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	5.7 (Berkeley) %G%";
#endif /* not lint */

/*
 * df
 */
#include <stdio.h>
#include <sys/types.h>
#include <sys/mount.h>
#include "pathnames.h"

int	iflag;
#ifdef COMPAT_43
int	oflag;
#endif /* COMPAT_43 */

main(argc, argv)
	int argc;
	char **argv;
{
	extern int errno, optind;
	int ch, i;
	long mntsize;
	struct statfs statfsbuf, *mntbuf;

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

	printf("Filesystem    kbytes    used   avail capacity");
	if (iflag)
		printf(" iused   ifree  %%iused");
	printf("  Mounted on\n");
#ifdef COMPAT_43
	if (oflag) {
		olddf(argv);
		exit(0);
	}
#endif /* COMPAT_43 */
	if (!*argv) {
		if ((mntsize = getfsstat(0, 0)) < 0) {
			perror("df");
			exit(1);
		}
		mntbuf = 0;
		do {
			if (mntbuf)
				free(mntbuf);
			i = (mntsize + 1) * sizeof(struct statfs);
			if ((mntbuf = (struct statfs *)malloc(i)) == 0) {
				fprintf(stderr,
					"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));
		for (i = 0; i < mntsize; i++)
			prtstat(&mntbuf[i]);
		exit(0);
	}
	for (; *argv; argv++) {
		if (statfs(*argv, &statfsbuf) < 0) {
			perror(*argv);
			continue;
		}
		prtstat(&statfsbuf);
	}
	exit(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 / 1024,
	    used * sfsp->f_fsize / 1024, sfsp->f_bavail * sfsp->f_fsize / 1024);
	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 <sys/param.h>
#include <ufs/fs.h>
#include <sys/stat.h>
#include <errno.h>
#include <fstab.h>
#include <mtab.h>

struct	mtab mtab[NMOUNT];
char	root[32];
char	*mpath();

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;
	char *strerror();
	int i;

	if ((i = open(_PATH_MTAB, 0)) < 0) {
		fprintf(stderr, "df: %s: %s\n", _PATH_MTAB,
			strerror(errno));
		exit(1);
	}
	(void) read(i, (char *)mtab, sizeof (mtab));
	(void) close(i);
	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 *strerror();

	if (stat(file, &stbuf) == 0 &&
	    (stbuf.st_mode&S_IFMT) != S_IFCHR &&
	    (stbuf.st_mode&S_IFMT) != S_IFBLK) {
		if (infsent) {
			fprintf(stderr, "%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, "%s: mounted on unknown device\n", file);
		return;
	}
found:
	if ((fi = open(file, 0)) < 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;
	bcopy((caddr_t)mpath(file), (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, 0);
	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);
}

/*
 * Given a name like /dev/rrp0h, returns the mounted path, like /usr.
 */
char *
mpath(file)
	char *file;
{
	register struct mtab *mp;

	if (eq(file, root))
		return ("/");
	for (mp = mtab; mp < mtab + NMOUNT; mp++)
		if (eq(file, mp->m_dname))
			return (mp->m_path);
	return "";
}

eq(f1, f2)
	char *f1, *f2;
{

	if (strncmp(f1, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0)
		f1 += 5;
	if (strncmp(f2, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0)
		f2 += 5;
	if (!strcmp(f1, f2))
		return (1);
	if (*f1 == 'r' && !strcmp(f1+1, f2))
		return (1);
	if (*f2 == 'r' && !strcmp(f1, f2+1))
		return (1);
	if (*f1 == 'r' && *f2 == 'r' && strcmp(f1+1, f2+1) == 0)
		return (1);
	return (0);
}
#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
704aadd2	25	static char sccsid[] = "@(#)df.c 5.7 (Berkeley) %G%";
7e8aa4e0	26	#endif /* not lint */
a98f5f82	27
8d335f7d BJ	28	/*
	29	* df
	30	*/
704aadd2 KM	31	#include <stdio.h>
	32	#include <sys/types.h>
	33	#include <sys/mount.h>
	34	#include "pathnames.h"
c7b72342	35
c7b72342	36	int iflag;
704aadd2 KM	37	#ifdef COMPAT_43
	38	int oflag;
	39	#endif /* COMPAT_43 */
c7b72342 BJ	40
c7b72342 BJ	41	main(argc, argv)
a98f5f82 BJ	42	int argc;
a98f5f82 BJ	43	char **argv;
c7b72342	44	{
dbdc06d4 KB	45	extern int errno, optind;
dbdc06d4 KB	46	int ch, i;
704aadd2 KM	47	long mntsize;
704aadd2 KM	48	struct statfs statfsbuf, *mntbuf;
c7b72342	49
704aadd2	50	while ((ch = getopt(argc, argv, "io")) != EOF)
dbdc06d4	51	switch(ch) {
8a7d0cad SL	52	case 'i':
	53	iflag++;
	54	break;
704aadd2 KM	55	#ifdef COMPAT_43
	56	case 'o':
	57	oflag++;
	58	break;
	59	#endif /* COMPAT_43 */
dbdc06d4	60	case '?':
8a7d0cad	61	default:
dbdc06d4 KB	62	fprintf(stderr, "usage: df [-i] [filsys ...]\n");
dbdc06d4 KB	63	exit(1);
8a7d0cad	64	}
dbdc06d4 KB	65	argc -= optind;
	66	argv += optind;
	67
704aadd2 KM	68	printf("Filesystem kbytes used avail capacity");
	69	if (iflag)
	70	printf(" iused ifree %%iused");
	71	printf(" Mounted on\n");
	72	#ifdef COMPAT_43
	73	if (oflag) {
	74	olddf(argv);
	75	exit(0);
	76	}
	77	#endif /* COMPAT_43 */
	78	if (!*argv) {
	79	if ((mntsize = getfsstat(0, 0)) < 0) {
	80	perror("df");
	81	exit(1);
	82	}
	83	mntbuf = 0;
	84	do {
	85	if (mntbuf)
	86	free(mntbuf);
	87	i = (mntsize + 1) * sizeof(struct statfs);
	88	if ((mntbuf = (struct statfs *)malloc(i)) == 0) {
	89	fprintf(stderr,
	90	"no space for mount table buffer\n");
	91	exit(1);
	92	}
	93	if ((mntsize = getfsstat(mntbuf, i)) < 0) {
	94	perror("df");
	95	exit(1);
	96	}
	97	} while (i == mntsize * sizeof(struct statfs));
	98	for (i = 0; i < mntsize; i++)
	99	prtstat(&mntbuf[i]);
	100	exit(0);
	101	}
	102	for (; *argv; argv++) {
	103	if (statfs(*argv, &statfsbuf) < 0) {
	104	perror(*argv);
	105	continue;
	106	}
	107	prtstat(&statfsbuf);
	108	}
	109	exit(0);
	110	}
	111
	112	/*
	113	* Print out status about a filesystem.
	114	*/
	115	prtstat(sfsp)
	116	register struct statfs *sfsp;
	117	{
	118	long used, availblks, inodes;
	119
	120	printf("%-12.12s", sfsp->f_mntfromname);
	121	used = sfsp->f_blocks - sfsp->f_bfree;
	122	availblks = sfsp->f_bavail + used;
	123	printf("%8ld%8ld%8ld", sfsp->f_blocks * sfsp->f_fsize / 1024,
	124	used * sfsp->f_fsize / 1024, sfsp->f_bavail * sfsp->f_fsize / 1024);
	125	printf("%6.0f%%",
	126	availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
	127	if (iflag) {
	128	inodes = sfsp->f_files;
	129	used = inodes - sfsp->f_ffree;
	130	printf("%8ld%8ld%6.0f%% ", used, sfsp->f_ffree,
	131	inodes == 0 ? 100.0 : (double)used / (double)inodes * 100.0);
132	} else
133	printf(" ");
134	printf(" %s\n", sfsp->f_mntonname);
135	}
136
137	#ifdef COMPAT_43
138	/*
139	* This code constitutes the old df code for extracting
140	* information from filesystem superblocks.
141	*/
142	#include <sys/param.h>
143	#include <ufs/fs.h>
144	#include <sys/stat.h>
145	#include <errno.h>
146	#include <fstab.h>
147	#include <mtab.h>
148
149	struct mtab mtab[NMOUNT];
150	char root[32];
151	char *mpath();
152
153	union {
154	struct fs iu_fs;
155	char dummy[SBSIZE];
156	} sb;
157	#define sblock sb.iu_fs
158
159	int fi;
160	char *strcpy();
161
162	olddf(argv)
163	char *argv[];
164	{
165	struct fstab *fsp;
166	char *strerror();
167	int i;
168
dbdc06d4	169	if ((i = open(_PATH_MTAB, 0)) < 0) {
704aadd2 KM	170	fprintf(stderr, "df: %s: %s\n", _PATH_MTAB,
704aadd2 KM	171	strerror(errno));
dbdc06d4	172	exit(1);
c7b72342	173	}
dbdc06d4 KB	174	(void) read(i, (char *)mtab, sizeof (mtab));
dbdc06d4 KB	175	(void) close(i);
dda19894	176	sync();
dbdc06d4	177	if (!*argv) {
8d335f7d	178	if (setfsent() == 0)
3b72df1c	179	perror(_PATH_FSTAB), exit(1);
a98f5f82	180	while (fsp = getfsent()) {
1f65a82f	181	if (strcmp(fsp->fs_type, FSTAB_RW) &&
351ef297 SL	182	strcmp(fsp->fs_type, FSTAB_RO) &&
351ef297 SL	183	strcmp(fsp->fs_type, FSTAB_RQ))
f0861f40	184	continue;
c7b72342	185	if (root[0] == 0)
f4d092e2	186	(void) strcpy(root, fsp->fs_spec);
a98f5f82	187	dfree(fsp->fs_spec, 1);
c7b72342	188	}
6c5c8ac3	189	(void)endfsent();
c7b72342 BJ	190	exit(0);
c7b72342 BJ	191	}
dbdc06d4 KB	192	while (*argv)
dbdc06d4 KB	193	dfree(*argv++, 0);
704aadd2	194	exit(0);
c7b72342 BJ	195	}
c7b72342 BJ	196
a98f5f82 BJ	197	dfree(file, infsent)
	198	char *file;
	199	int infsent;
c7b72342	200	{
dbdc06d4	201	extern int errno;
a98f5f82	202	struct stat stbuf;
704aadd2 KM	203	struct statfs statfsbuf;
704aadd2 KM	204	register struct statfs *sfsp;
a98f5f82	205	struct fstab *fsp;
dbdc06d4	206	char *strerror();
a98f5f82 BJ	207
	208	if (stat(file, &stbuf) == 0 &&
	209	(stbuf.st_mode&S_IFMT) != S_IFCHR &&
	210	(stbuf.st_mode&S_IFMT) != S_IFBLK) {
	211	if (infsent) {
f6c7ec9d	212	fprintf(stderr, "%s: screwy fstab entry\n", file);
8d335f7d BJ	213	return;
8d335f7d BJ	214	}
6c5c8ac3	215	(void)setfsent();
a98f5f82 BJ	216	while (fsp = getfsent()) {
	217	struct stat stb;
	218
	219	if (stat(fsp->fs_spec, &stb) == 0 &&
	220	stb.st_rdev == stbuf.st_dev) {
	221	file = fsp->fs_spec;
6c5c8ac3	222	(void)endfsent();
a98f5f82 BJ	223	goto found;
	224	}
	225	}
6c5c8ac3	226	(void)endfsent();
a98f5f82 BJ	227	fprintf(stderr, "%s: mounted on unknown device\n", file);
a98f5f82 BJ	228	return;
8d335f7d	229	}
a98f5f82	230	found:
dbdc06d4 KB	231	if ((fi = open(file, 0)) < 0) {
dbdc06d4 KB	232	fprintf(stderr, "df: %s: %s\n", file, strerror(errno));
c7b72342 BJ	233	return;
c7b72342 BJ	234	}
6c5c8ac3	235	if (bread((long)SBOFF, (char *)&sblock, SBSIZE) == 0) {
f5064bf4 RC	236	(void) close(fi);
	237	return;
	238	}
704aadd2 KM	239	sfsp = &statfsbuf;
	240	sfsp->f_type = MOUNT_UFS;
	241	sfsp->f_flags = 0;
	242	sfsp->f_fsize = sblock.fs_fsize;
	243	sfsp->f_bsize = sblock.fs_bsize;
	244	sfsp->f_blocks = sblock.fs_dsize;
	245	sfsp->f_bfree = sblock.fs_cstotal.cs_nbfree * sblock.fs_frag +
	246	sblock.fs_cstotal.cs_nffree;
	247	sfsp->f_bavail = (sblock.fs_dsize * (100 - sblock.fs_minfree) / 100) -
	248	(sblock.fs_dsize - sfsp->f_bfree);
	249	if (sfsp->f_bavail < 0)
	250	sfsp->f_bavail = 0;
	251	sfsp->f_files = sblock.fs_ncg * sblock.fs_ipg;
	252	sfsp->f_ffree = sblock.fs_cstotal.cs_nifree;
	253	sfsp->f_fsid.val[0] = 0;
	254	sfsp->f_fsid.val[1] = 0;
	255	bcopy((caddr_t)mpath(file), (caddr_t)&sfsp->f_mntonname[0], MNAMELEN);
	256	bcopy((caddr_t)file, (caddr_t)&sfsp->f_mntfromname[0], MNAMELEN);
	257	prtstat(sfsp);
f4d092e2	258	(void) close(fi);
c7b72342 BJ	259	}
c7b72342 BJ	260
f4d092e2 KM	261	long lseek();
f4d092e2 KM	262
6c5c8ac3 KM	263	bread(off, buf, cnt)
6c5c8ac3 KM	264	long off;
a98f5f82	265	char *buf;
c7b72342 BJ	266	{
	267	int n;
	268	extern errno;
	269
6c5c8ac3	270	(void) lseek(fi, off, 0);
a98f5f82	271	if ((n=read(fi, buf, cnt)) != cnt) {
f5064bf4 RC	272	/* probably a dismounted disk if errno == EIO */
f5064bf4 RC	273	if (errno != EIO) {
6c5c8ac3	274	printf("\nread error off = %ld\n", off);
f5064bf4 RC	275	printf("count = %d; errno = %d\n", n, errno);
	276	}
	277	return (0);
c7b72342	278	}
f5064bf4	279	return (1);
c7b72342 BJ	280	}
	281
	282	/*
	283	* Given a name like /dev/rrp0h, returns the mounted path, like /usr.
	284	*/
8a7d0cad SL	285	char *
8a7d0cad SL	286	mpath(file)
a98f5f82	287	char *file;
c7b72342	288	{
8a7d0cad	289	register struct mtab *mp;
c7b72342 BJ	290
c7b72342 BJ	291	if (eq(file, root))
8a7d0cad SL	292	return ("/");
	293	for (mp = mtab; mp < mtab + NMOUNT; mp++)
	294	if (eq(file, mp->m_dname))
	295	return (mp->m_path);
c7b72342 BJ	296	return "";
	297	}
	298
	299	eq(f1, f2)
a98f5f82	300	char f1, f2;
c7b72342	301	{
a98f5f82	302
f6c7ec9d	303	if (strncmp(f1, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0)
c7b72342	304	f1 += 5;
f6c7ec9d	305	if (strncmp(f2, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0)
c7b72342	306	f2 += 5;
a98f5f82 BJ	307	if (!strcmp(f1, f2))
	308	return (1);
	309	if (*f1 == 'r' && !strcmp(f1+1, f2))
	310	return (1);
	311	if (*f2 == 'r' && !strcmp(f1, f2+1))
	312	return (1);
c7b72342	313	if (f1 == 'r' && f2 == 'r' && strcmp(f1+1, f2+1) == 0)
a98f5f82 BJ	314	return (1);
a98f5f82 BJ	315	return (0);
c7b72342	316	}
704aadd2	317	#endif /* COMPAT_43 */