2 * Copyright (c) 1980, 1990, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.
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11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
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18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * @(#) Copyright (c) 1980, 1990, 1993, 1994 The Regents of the University of California. All rights reserved.
35 * @(#)df.c 8.9 (Berkeley) 5/8/95
36 * $FreeBSD: src/bin/df/df.c,v 1.23.2.9 2002/07/01 00:14:24 iedowse Exp $
39 #include <sys/param.h>
41 #include <sys/mount.h>
42 #include <sys/sysctl.h>
43 #include <sys/statvfs.h>
45 #include <vfs/ufs/dinode.h>
46 #include <vfs/ufs/fs.h>
47 #include <vfs/ufs/ufsmount.h>
63 /* Maximum widths of various fields. */
75 char **makevfslist(char *);
76 int checkvfsname(const char *, char **);
78 static int bread(off_t, void *, int);
79 static char *getmntpt(char *);
80 static int quadwidth(int64_t);
81 static char *makenetvfslist(void);
82 static void prthuman(struct statvfs *, int64_t);
83 static void prthumanval(int64_t);
84 static void prtstat(struct statfs *, struct statvfs *, struct maxwidths *);
85 static long regetmntinfo(struct statfs **, struct statvfs **, long, char **);
86 static int ufs_df(char *, struct maxwidths *);
87 static void update_maxwidths(struct maxwidths *, struct statfs *, struct statvfs *);
88 static void usage(void);
90 int aflag = 0, hflag, iflag, nflag, Tflag;
96 return (a > b ? a : b);
99 static __inline int64_t
100 qmax(int64_t a, int64_t b)
102 return (a > b ? a : b);
106 main(int argc, char **argv)
109 struct statfs statfsbuf, *mntbuf;
110 struct statvfs statvfsbuf, *mntvbuf;
111 struct maxwidths maxwidths;
113 char *mntpath, *mntpt, **vfslist;
120 while ((ch = getopt(argc, argv, "abgHhiklmnPt:T")) != -1)
128 if (setenv("BLOCKSIZE", "512", 1) != 0)
129 warn("setenv: cannot set BLOCKSIZE=512");
133 if (setenv("BLOCKSIZE", "1g", 1) != 0)
134 warn("setenv: cannot set BLOCKSIZE=1g");
147 if (setenv("BLOCKSIZE", "1k", 1) != 0)
148 warn("setenv: cannot set BLOCKSIZE=1k");
153 errx(1, "-l and -t are mutually exclusive.");
154 vfslist = makevfslist(makenetvfslist());
157 if (setenv("BLOCKSIZE", "1m", 1) != 0)
158 warn("setenv: cannot set BLOCKSIZE=1m");
166 errx(1, "only one -t option may be specified");
168 vfslist = makevfslist(optarg);
180 mntsize = getmntvinfo(&mntbuf, &mntvbuf, MNT_NOWAIT);
181 bzero(&maxwidths, sizeof(maxwidths));
182 for (i = 0; i < mntsize; i++)
183 update_maxwidths(&maxwidths, &mntbuf[i], &mntvbuf[i]);
187 mntsize = regetmntinfo(&mntbuf, &mntvbuf, mntsize, vfslist);
188 bzero(&maxwidths, sizeof(maxwidths));
189 for (i = 0; i < mntsize; i++)
190 update_maxwidths(&maxwidths, &mntbuf[i], &mntvbuf[i]);
191 for (i = 0; i < mntsize; i++) {
192 if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0)
193 prtstat(&mntbuf[i], &mntvbuf[i], &maxwidths);
198 for (; *argv; argv++) {
199 if (stat(*argv, &stbuf) < 0) {
200 if ((mntpt = getmntpt(*argv)) == NULL) {
205 } else if (S_ISCHR(stbuf.st_mode)) {
206 if ((mntpt = getmntpt(*argv)) == NULL) {
208 mntpath = strdup("/tmp/df.XXXXXX");
209 if (mntpath == NULL) {
210 warn("strdup failed");
214 mntpt = mkdtemp(mntpath);
216 warn("mkdtemp(\"%s\") failed", mntpath);
221 if (mount(fstype, mntpt, MNT_RDONLY,
223 rv = ufs_df(*argv, &maxwidths) || rv;
227 } else if (statfs(mntpt, &statfsbuf) == 0 &&
228 statvfs(mntpt, &statvfsbuf) == 0) {
229 statfsbuf.f_mntonname[0] = '\0';
230 prtstat(&statfsbuf, &statvfsbuf, &maxwidths);
243 * Statfs does not take a `wait' flag, so we cannot
244 * implement nflag here.
246 if (statfs(mntpt, &statfsbuf) < 0) {
251 if (statvfs(mntpt, &statvfsbuf) < 0) {
257 * Check to make sure the arguments we've been given are
258 * satisfied. Return an error if we have been asked to
259 * list a mount point that does not match the other args
260 * we've been given (-l, -t, etc.).
262 if (checkvfsname(statfsbuf.f_fstypename, vfslist)) {
268 bzero(&maxwidths, sizeof(maxwidths));
269 update_maxwidths(&maxwidths, &statfsbuf, &statvfsbuf);
271 prtstat(&statfsbuf, &statvfsbuf, &maxwidths);
280 struct statfs *mntbuf;
281 struct statvfs *mntvbuf;
283 mntsize = getmntvinfo(&mntbuf, &mntvbuf, MNT_NOWAIT);
284 for (i = 0; i < mntsize; i++) {
285 if (!strcmp(mntbuf[i].f_mntfromname, name))
286 return (mntbuf[i].f_mntonname);
292 * Make a pass over the filesystem info in ``mntbuf'' filtering out
293 * filesystem types not in vfslist and possibly re-stating to get
294 * current (not cached) info. Returns the new count of valid statfs bufs.
297 regetmntinfo(struct statfs **mntbufp, struct statvfs **mntvbufp, long mntsize, char **vfslist)
300 struct statfs *mntbuf;
301 struct statvfs *mntvbuf;
304 return (nflag ? mntsize : getmntvinfo(mntbufp, mntvbufp, MNT_WAIT));
308 for (j = 0, i = 0; i < mntsize; i++) {
309 if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
312 statfs(mntbuf[i].f_mntonname,&mntbuf[j]);
313 statvfs(mntbuf[i].f_mntonname,&mntvbuf[j]);
315 mntbuf[j] = mntbuf[i];
316 mntvbuf[j] = mntvbuf[i];
324 prthuman(struct statvfs *vsfsp, int64_t used)
326 prthumanval(vsfsp->f_blocks * vsfsp->f_bsize);
327 prthumanval(used * vsfsp->f_bsize);
328 prthumanval(vsfsp->f_bavail * vsfsp->f_bsize);
332 prthumanval(int64_t bytes)
337 flags = HN_B | HN_NOSPACE | HN_DECIMAL;
338 if (hflag == UNITS_SI)
339 flags |= HN_DIVISOR_1000;
341 humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1),
342 bytes, "", HN_AUTOSCALE, flags);
348 * Print an inode count in "human-readable" format.
351 prthumanvalinode(int64_t bytes)
356 flags = HN_NOSPACE | HN_DECIMAL | HN_DIVISOR_1000;
358 humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1),
359 bytes, "", HN_AUTOSCALE, flags);
365 * Convert statfs returned filesystem size into BLOCKSIZE units.
366 * Attempts to avoid overflow for large filesystems.
369 fsbtoblk(int64_t num, uint64_t bsize, u_long reqbsize)
371 if (bsize != 0 && bsize < reqbsize)
372 return (num / (intmax_t)(reqbsize / bsize));
374 return (num * (intmax_t)(bsize / reqbsize));
378 * Print out status about a filesystem.
381 prtstat(struct statfs *sfsp, struct statvfs *vsfsp, struct maxwidths *mwp)
383 static long blocksize;
384 static int headerlen, timesthrough;
385 static const char *header;
386 int64_t used, availblks, inodes;
388 if (++timesthrough == 1) {
389 mwp->mntfrom = imax(mwp->mntfrom, strlen("Filesystem"));
390 mwp->fstype = imax(mwp->fstype, strlen("Type"));
393 mwp->total = mwp->used = mwp->avail = strlen(header);
395 header = getbsize(&headerlen, &blocksize);
396 mwp->total = imax(mwp->total, headerlen);
398 mwp->used = imax(mwp->used, strlen("Used"));
399 mwp->avail = imax(mwp->avail, strlen("Avail"));
401 printf("%-*s", mwp->mntfrom, "Filesystem");
403 printf(" %-*s", mwp->fstype, "Type");
404 printf(" %-*s %*s %*s Capacity", mwp->total, header, mwp->used,
405 "Used", mwp->avail, "Avail");
407 mwp->iused = imax(mwp->iused, strlen(" iused"));
408 mwp->ifree = imax(mwp->ifree, strlen("ifree"));
409 printf(" %*s %*s %%iused", mwp->iused - 2,
410 "iused", mwp->ifree, "ifree");
412 printf(" Mounted on\n");
414 printf("%-*s", mwp->mntfrom, sfsp->f_mntfromname);
416 printf(" %-*s", mwp->fstype, sfsp->f_fstypename);
417 used = vsfsp->f_blocks - vsfsp->f_bfree;
418 availblks = vsfsp->f_bavail + used;
420 prthuman(vsfsp, used);
422 printf(" %*jd %*jd %*jd", mwp->total,
423 fsbtoblk(vsfsp->f_blocks, vsfsp->f_bsize, blocksize),
424 mwp->used, fsbtoblk(used, vsfsp->f_bsize, blocksize),
425 mwp->avail, fsbtoblk(vsfsp->f_bavail, vsfsp->f_bsize,
429 availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
431 inodes = vsfsp->f_files;
432 used = inodes - vsfsp->f_ffree;
435 prthumanvalinode(used);
436 prthumanvalinode(vsfsp->f_ffree);
438 printf(" %*jd %*jd", mwp->iused, (intmax_t)used,
439 mwp->ifree, (intmax_t)vsfsp->f_ffree);
441 printf(" %4.0f%% ", inodes == 0 ? 100.0 :
442 (double)used / (double)inodes * 100.0);
445 printf(" %s\n", sfsp->f_mntonname);
449 * Update the maximum field-width information in `mwp' based on
450 * the filesystem specified by `sfsp'.
453 update_maxwidths(struct maxwidths *mwp, struct statfs *sfsp, struct statvfs *vsfsp)
455 static long blocksize;
459 getbsize(&dummy, &blocksize);
461 mwp->mntfrom = imax(mwp->mntfrom, strlen(sfsp->f_mntfromname));
462 mwp->fstype = imax(mwp->fstype, strlen(sfsp->f_fstypename));
463 mwp->total = imax(mwp->total, quadwidth(fsbtoblk(vsfsp->f_blocks,
464 vsfsp->f_bsize, blocksize)));
465 mwp->used = imax(mwp->used, quadwidth(fsbtoblk(vsfsp->f_blocks -
466 vsfsp->f_bfree, vsfsp->f_bsize, blocksize)));
467 mwp->avail = imax(mwp->avail, quadwidth(fsbtoblk(vsfsp->f_bavail,
468 vsfsp->f_bsize, blocksize)));
469 mwp->iused = imax(mwp->iused, quadwidth(vsfsp->f_files -
471 mwp->ifree = imax(mwp->ifree, quadwidth(vsfsp->f_ffree));
474 /* Return the width in characters of the specified long. */
476 quadwidth(int64_t val)
481 /* Negative or zero values require one extra digit. */
494 * This code constitutes the pre-system call Berkeley df code for extracting
495 * information from filesystem superblocks.
502 #define sblock sb.iu_fs
507 ufs_df(char *file, struct maxwidths *mwp)
509 struct statfs statfsbuf;
510 struct statvfs statvfsbuf;
512 struct statvfs *vsfsp;
519 if ((rfd = open(file, O_RDONLY)) < 0) {
523 if (bread((off_t)SBOFF, &sblock, SBSIZE) == 0) {
530 strcpy(sfsp->f_fstypename, "ufs");
532 sfsp->f_bsize = vsfsp->f_bsize = sblock.fs_fsize;
533 sfsp->f_iosize = vsfsp->f_frsize = sblock.fs_bsize;
534 sfsp->f_blocks = vsfsp->f_blocks = sblock.fs_dsize;
535 sfsp->f_bfree = vsfsp->f_bfree =
536 sblock.fs_cstotal.cs_nbfree * sblock.fs_frag +
537 sblock.fs_cstotal.cs_nffree;
538 sfsp->f_bavail = vsfsp->f_bavail = freespace(&sblock, sblock.fs_minfree);
539 sfsp->f_files = vsfsp->f_files = sblock.fs_ncg * sblock.fs_ipg;
540 sfsp->f_ffree = vsfsp->f_ffree = sblock.fs_cstotal.cs_nifree;
541 sfsp->f_fsid.val[0] = 0;
542 sfsp->f_fsid.val[1] = 0;
543 if ((mntpt = getmntpt(file)) == NULL)
545 memmove(&sfsp->f_mntonname[0], mntpt, (size_t)MNAMELEN);
546 memmove(&sfsp->f_mntfromname[0], file, (size_t)MNAMELEN);
547 prtstat(sfsp, vsfsp, mwp);
553 bread(off_t off, void *buf, int cnt)
557 lseek(rfd, off, SEEK_SET);
558 if ((nr = read(rfd, buf, (size_t)cnt)) != (ssize_t)cnt) {
559 /* Probably a dismounted disk if errno == EIO. */
561 fprintf(stderr, "\ndf: %lld: %s\n",
562 (long long)off, strerror(nr > 0 ? EIO : errno));
573 "usage: df [-b | -H | -h | -k | -m | -P] [-ailnT] [-t type] [file | filesystem ...]\n");
580 char *str, *strptr, **listptr;
581 int mib[3], maxvfsconf, cnt=0, i;
583 struct ovfsconf *ptr;
585 mib[0] = CTL_VFS; mib[1] = VFS_GENERIC; mib[2] = VFS_MAXTYPENUM;
586 miblen=sizeof(maxvfsconf);
587 if (sysctl(mib, (unsigned int)(sizeof(mib) / sizeof(mib[0])),
588 &maxvfsconf, &miblen, NULL, 0)) {
589 warnx("sysctl failed");
593 if ((listptr = malloc(sizeof(char*) * maxvfsconf)) == NULL) {
594 warnx("malloc failed");
598 for (ptr = getvfsent(); ptr; ptr = getvfsent())
599 if (ptr->vfc_flags & VFCF_NETWORK) {
600 listptr[cnt++] = strdup(ptr->vfc_name);
601 if (listptr[cnt-1] == NULL) {
602 warnx("malloc failed");
609 (str = malloc(sizeof(char) * (32 * cnt + cnt + 2))) == NULL) {
611 warnx("malloc failed");
616 *str = 'n'; *(str + 1) = 'o';
617 for (i = 0, strptr = str + 2; i < cnt; i++, strptr++) {
618 strncpy(strptr, listptr[i], 32);
619 strptr += strlen(listptr[i]);