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

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

char	*getmntpt();
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;
	char *mntpt;
	struct stat stbuf;
	struct statfs statfsbuf, *mntbuf;
	struct ufs_args mdev;

	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) {
		mntsize = getmntinfo(&mntbuf);
		for (i = 0; i < mntsize; i++)
			prtstat(&mntbuf[i]);
		exit(0);
	}
	for (; *argv; argv++) {
		if (stat(*argv, &stbuf) < 0) {
			if ((mntpt = getmntpt(*argv)) == 0)
				continue;
		} else if ((stbuf.st_mode & S_IFMT) == S_IFBLK) {
			if ((mntpt = getmntpt(*argv)) == 0)
				mntpt = "/tmp/.mnt";
				mdev.fspec = *argv;
				if (!mkdir(mntpt) &&
				    !mount(MOUNT_UFS, mntpt, M_RDONLY, &mdev) &&
				    !statfs(mntpt, &statfsbuf)) {
					statfsbuf.f_mntonname[0] = '\0';
					prtstat(&statfsbuf);
				} else {
					perror(*argv);
				}
				umount(mntpt, MNT_NOFORCE);
				rmdir(mntpt);
				continue;
		} else
			mntpt = *argv;
		if (statfs(mntpt, &statfsbuf) < 0) {
			perror(mntpt);
			continue;
		}
		prtstat(&statfsbuf);
	}
	exit(0);
}

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,
				"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 / 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 <errno.h>
#include <fstab.h>

char	root[32];

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();

	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, *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;
	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, 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);
}
#endif /* COMPAT_43 */
Commit	Line	Data
	1	/*
	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.
	16	*/
	17
	18	#ifndef lint
	19	char copyright[] =
	20	"@(#) Copyright (c) 1980 The Regents of the University of California.\n\
	21	All rights reserved.\n";
	22	#endif /* not lint */
	23
	24	#ifndef lint
	25	static char sccsid[] = "@(#)df.c 5.9 (Berkeley) %G%";
	26	#endif /* not lint */
	27
	28	/*
	29	* df
	30	*/
	31	#include <stdio.h>
	32	#include <sys/types.h>
	33	#include <sys/stat.h>
	34	#include <sys/mount.h>
	35	#include "pathnames.h"
	36
	37	char *getmntpt();
	38	int iflag;
	39	#ifdef COMPAT_43
	40	int oflag;
	41	#endif /* COMPAT_43 */
	42
	43	main(argc, argv)
	44	int argc;
	45	char **argv;
	46	{
	47	extern int errno, optind;
	48	int ch, i;
	49	long mntsize;
	50	char *mntpt;
	51	struct stat stbuf;
	52	struct statfs statfsbuf, *mntbuf;
	53	struct ufs_args mdev;
	54
	55	while ((ch = getopt(argc, argv, "io")) != EOF)
	56	switch(ch) {
	57	case 'i':
	58	iflag++;
	59	break;
	60	#ifdef COMPAT_43
	61	case 'o':
	62	oflag++;
	63	break;
	64	#endif /* COMPAT_43 */
	65	case '?':
	66	default:
	67	fprintf(stderr, "usage: df [-i] [filsys ...]\n");
	68	exit(1);
	69	}
	70	argc -= optind;
	71	argv += optind;
	72
	73	printf("Filesystem kbytes used avail capacity");
	74	if (iflag)
	75	printf(" iused ifree %%iused");
	76	printf(" Mounted on\n");
	77	#ifdef COMPAT_43
	78	if (oflag) {
	79	olddf(argv);
	80	exit(0);
	81	}
	82	#endif /* COMPAT_43 */
	83	if (!*argv) {
	84	mntsize = getmntinfo(&mntbuf);
	85	for (i = 0; i < mntsize; i++)
	86	prtstat(&mntbuf[i]);
	87	exit(0);
	88	}
	89	for (; *argv; argv++) {
	90	if (stat(*argv, &stbuf) < 0) {
	91	if ((mntpt = getmntpt(*argv)) == 0)
	92	continue;
	93	} else if ((stbuf.st_mode & S_IFMT) == S_IFBLK) {
	94	if ((mntpt = getmntpt(*argv)) == 0)
	95	mntpt = "/tmp/.mnt";
	96	mdev.fspec = *argv;
	97	if (!mkdir(mntpt) &&
	98	!mount(MOUNT_UFS, mntpt, M_RDONLY, &mdev) &&
	99	!statfs(mntpt, &statfsbuf)) {
	100	statfsbuf.f_mntonname[0] = '\0';
	101	prtstat(&statfsbuf);
	102	} else {
	103	perror(*argv);
	104	}
	105	umount(mntpt, MNT_NOFORCE);
	106	rmdir(mntpt);
	107	continue;
	108	} else
	109	mntpt = *argv;
	110	if (statfs(mntpt, &statfsbuf) < 0) {
	111	perror(mntpt);
	112	continue;
	113	}
	114	prtstat(&statfsbuf);
	115	}
	116	exit(0);
	117	}
	118
	119	getmntinfo(mntbufp)
	120	struct statfs **mntbufp;
	121	{
	122	int i;
	123	static long mntsize;
	124	static struct statfs *mntbuf = 0;
	125	char *malloc();
	126
	127	if (mntbuf) {
	128	*mntbufp = mntbuf;
	129	return (mntsize);
	130	}
	131	if ((mntsize = getfsstat((struct statfs *)0, 0)) < 0) {
	132	perror("df");
	133	exit(1);
	134	}
	135	mntbuf = 0;
	136	do {
	137	if (mntbuf)
	138	free((char *)mntbuf);
	139	i = (mntsize + 1) * sizeof(struct statfs);
	140	if ((mntbuf = (struct statfs *)malloc((unsigned)i)) == 0) {
	141	fprintf(stderr,
	142	"no space for mount table buffer\n");
	143	exit(1);
	144	}
	145	if ((mntsize = getfsstat(mntbuf, i)) < 0) {
	146	perror("df");
	147	exit(1);
	148	}
	149	} while (i == mntsize * sizeof(struct statfs));
	150	*mntbufp = mntbuf;
	151	return (mntsize);
	152	}
	153
	154	char *
	155	getmntpt(name)
	156	char *name;
	157	{
	158	long mntsize, i;
	159	struct statfs *mntbuf;
	160
	161	mntsize = getmntinfo(&mntbuf);
	162	for (i = 0; i < mntsize; i++) {
	163	if (!strcmp(mntbuf[i].f_mntfromname, name))
	164	return (mntbuf[i].f_mntonname);
	165	}
	166	return (0);
	167	}
	168
	169	/*
	170	* Print out status about a filesystem.
	171	*/
	172	prtstat(sfsp)
	173	register struct statfs *sfsp;
	174	{
	175	long used, availblks, inodes;
	176
	177	printf("%-12.12s", sfsp->f_mntfromname);
	178	used = sfsp->f_blocks - sfsp->f_bfree;
	179	availblks = sfsp->f_bavail + used;
	180	printf("%8ld%8ld%8ld", sfsp->f_blocks * sfsp->f_fsize / 1024,
	181	used * sfsp->f_fsize / 1024, sfsp->f_bavail * sfsp->f_fsize / 1024);
	182	printf("%6.0f%%",
	183	availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
	184	if (iflag) {
	185	inodes = sfsp->f_files;
	186	used = inodes - sfsp->f_ffree;
	187	printf("%8ld%8ld%6.0f%% ", used, sfsp->f_ffree,
	188	inodes == 0 ? 100.0 : (double)used / (double)inodes * 100.0);
	189	} else
	190	printf(" ");
	191	printf(" %s\n", sfsp->f_mntonname);
	192	}
	193
	194	#ifdef COMPAT_43
	195	/*
	196	* This code constitutes the old df code for extracting
	197	* information from filesystem superblocks.
	198	*/
	199	#include <sys/param.h>
	200	#include <ufs/fs.h>
	201	#include <errno.h>
	202	#include <fstab.h>
	203
	204	char root[32];
	205
	206	union {
	207	struct fs iu_fs;
	208	char dummy[SBSIZE];
	209	} sb;
	210	#define sblock sb.iu_fs
	211
	212	int fi;
	213	char *strcpy();
	214
	215	olddf(argv)
	216	char *argv[];
	217	{
	218	struct fstab *fsp;
	219	char *strerror();
	220
	221	sync();
	222	if (!*argv) {
	223	if (setfsent() == 0)
	224	perror(_PATH_FSTAB), exit(1);
	225	while (fsp = getfsent()) {
	226	if (strcmp(fsp->fs_type, FSTAB_RW) &&
	227	strcmp(fsp->fs_type, FSTAB_RO) &&
	228	strcmp(fsp->fs_type, FSTAB_RQ))
	229	continue;
	230	if (root[0] == 0)
	231	(void) strcpy(root, fsp->fs_spec);
	232	dfree(fsp->fs_spec, 1);
	233	}
	234	(void)endfsent();
	235	exit(0);
	236	}
	237	while (*argv)
	238	dfree(*argv++, 0);
	239	exit(0);
	240	}
	241
	242	dfree(file, infsent)
	243	char *file;
	244	int infsent;
	245	{
	246	extern int errno;
	247	struct stat stbuf;
	248	struct statfs statfsbuf;
	249	register struct statfs *sfsp;
	250	struct fstab *fsp;
	251	char mntpt, strerror();
	252
	253	if (stat(file, &stbuf) == 0 &&
	254	(stbuf.st_mode&S_IFMT) != S_IFCHR &&
	255	(stbuf.st_mode&S_IFMT) != S_IFBLK) {
	256	if (infsent) {
	257	fprintf(stderr, "%s: screwy fstab entry\n", file);
	258	return;
	259	}
	260	(void)setfsent();
	261	while (fsp = getfsent()) {
	262	struct stat stb;
	263
	264	if (stat(fsp->fs_spec, &stb) == 0 &&
	265	stb.st_rdev == stbuf.st_dev) {
	266	file = fsp->fs_spec;
	267	(void)endfsent();
	268	goto found;
	269	}
	270	}
	271	(void)endfsent();
	272	fprintf(stderr, "%s: mounted on unknown device\n", file);
	273	return;
	274	}
	275	found:
	276	if ((fi = open(file, 0)) < 0) {
	277	fprintf(stderr, "df: %s: %s\n", file, strerror(errno));
	278	return;
	279	}
	280	if (bread((long)SBOFF, (char *)&sblock, SBSIZE) == 0) {
	281	(void) close(fi);
	282	return;
	283	}
	284	sfsp = &statfsbuf;
	285	sfsp->f_type = MOUNT_UFS;
	286	sfsp->f_flags = 0;
	287	sfsp->f_fsize = sblock.fs_fsize;
	288	sfsp->f_bsize = sblock.fs_bsize;
	289	sfsp->f_blocks = sblock.fs_dsize;
	290	sfsp->f_bfree = sblock.fs_cstotal.cs_nbfree * sblock.fs_frag +
	291	sblock.fs_cstotal.cs_nffree;
	292	sfsp->f_bavail = (sblock.fs_dsize * (100 - sblock.fs_minfree) / 100) -
	293	(sblock.fs_dsize - sfsp->f_bfree);
	294	if (sfsp->f_bavail < 0)
	295	sfsp->f_bavail = 0;
	296	sfsp->f_files = sblock.fs_ncg * sblock.fs_ipg;
	297	sfsp->f_ffree = sblock.fs_cstotal.cs_nifree;
	298	sfsp->f_fsid.val[0] = 0;
	299	sfsp->f_fsid.val[1] = 0;
	300	if ((mntpt = getmntpt(file)) == 0)
	301	mntpt = "";
	302	bcopy((caddr_t)mntpt, (caddr_t)&sfsp->f_mntonname[0], MNAMELEN);
	303	bcopy((caddr_t)file, (caddr_t)&sfsp->f_mntfromname[0], MNAMELEN);
	304	prtstat(sfsp);
	305	(void) close(fi);
	306	}
	307
	308	long lseek();
	309
	310	bread(off, buf, cnt)
	311	long off;
	312	char *buf;
	313	{
	314	int n;
	315	extern errno;
	316
	317	(void) lseek(fi, off, 0);
	318	if ((n=read(fi, buf, cnt)) != cnt) {
	319	/* probably a dismounted disk if errno == EIO */
	320	if (errno != EIO) {
	321	printf("\nread error off = %ld\n", off);
	322	printf("count = %d; errno = %d\n", n, errno);
	323	}
	324	return (0);
	325	}
	326	return (1);
	327	}
	328	#endif /* COMPAT_43 */