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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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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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
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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. */
74 char **makevfslist(char *);
75 int checkvfsname(const char *, char **);
77 static int bread(off_t, void *, int);
78 static char *getmntpt(char *);
79 static int quadwidth(int64_t);
80 static char *makenetvfslist(void);
81 static void prthuman(struct statvfs *, int64_t);
82 static void prthumanval(int64_t);
83 static void prtstat(struct statfs *, struct statvfs *, struct maxwidths *);
84 static long regetmntinfo(struct statfs **, struct statvfs **, long, char **);
85 static int ufs_df(char *, struct maxwidths *);
86 static void update_maxwidths(struct maxwidths *, struct statfs *, struct statvfs *);
87 static void usage(void);
89 int aflag = 0, hflag, iflag, nflag;
95 return (a > b ? a : b);
98 static __inline int64_t
99 qmax(int64_t a, int64_t b)
101 return (a > b ? a : b);
105 main(int argc, char **argv)
108 struct statfs statfsbuf, *mntbuf;
109 struct statvfs statvfsbuf, *mntvbuf;
110 struct maxwidths maxwidths;
112 char *mntpath, *mntpt, **vfslist;
119 while ((ch = getopt(argc, argv, "abgHhiklmnPt:")) != -1)
127 if (setenv("BLOCKSIZE", "512", 1) != 0)
128 warn("setenv: cannot set BLOCKSIZE=512");
132 if (setenv("BLOCKSIZE", "1g", 1) != 0)
133 warn("setenv: cannot set BLOCKSIZE=1g");
146 if (setenv("BLOCKSIZE", "1k", 1) != 0)
147 warn("setenv: cannot set BLOCKSIZE=1k");
152 errx(1, "-l and -t are mutually exclusive.");
153 vfslist = makevfslist(makenetvfslist());
156 if (setenv("BLOCKSIZE", "1m", 1) != 0)
157 warn("setenv: cannot set BLOCKSIZE=1m");
165 errx(1, "only one -t option may be specified");
167 vfslist = makevfslist(optarg);
176 mntsize = getmntvinfo(&mntbuf, &mntvbuf, MNT_NOWAIT);
177 bzero(&maxwidths, sizeof(maxwidths));
178 for (i = 0; i < mntsize; i++)
179 update_maxwidths(&maxwidths, &mntbuf[i], &mntvbuf[i]);
183 mntsize = regetmntinfo(&mntbuf, &mntvbuf, mntsize, vfslist);
184 bzero(&maxwidths, sizeof(maxwidths));
185 for (i = 0; i < mntsize; i++)
186 update_maxwidths(&maxwidths, &mntbuf[i], &mntvbuf[i]);
187 for (i = 0; i < mntsize; i++) {
188 if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0)
189 prtstat(&mntbuf[i], &mntvbuf[i], &maxwidths);
194 for (; *argv; argv++) {
195 if (stat(*argv, &stbuf) < 0) {
196 if ((mntpt = getmntpt(*argv)) == NULL) {
201 } else if (S_ISCHR(stbuf.st_mode)) {
202 if ((mntpt = getmntpt(*argv)) == NULL) {
204 mntpath = strdup("/tmp/df.XXXXXX");
205 if (mntpath == NULL) {
206 warn("strdup failed");
210 mntpt = mkdtemp(mntpath);
212 warn("mkdtemp(\"%s\") failed", mntpath);
217 if (mount(fstype, mntpt, MNT_RDONLY,
219 rv = ufs_df(*argv, &maxwidths) || rv;
223 } else if (statfs(mntpt, &statfsbuf) == 0 &&
224 statvfs(mntpt, &statvfsbuf) == 0) {
225 statfsbuf.f_mntonname[0] = '\0';
226 prtstat(&statfsbuf, &statvfsbuf, &maxwidths);
239 * Statfs does not take a `wait' flag, so we cannot
240 * implement nflag here.
242 if (statfs(mntpt, &statfsbuf) < 0) {
247 if (statvfs(mntpt, &statvfsbuf) < 0) {
253 * Check to make sure the arguments we've been given are
254 * satisfied. Return an error if we have been asked to
255 * list a mount point that does not match the other args
256 * we've been given (-l, -t, etc.).
258 if (checkvfsname(statfsbuf.f_fstypename, vfslist)) {
264 bzero(&maxwidths, sizeof(maxwidths));
265 update_maxwidths(&maxwidths, &statfsbuf, &statvfsbuf);
267 prtstat(&statfsbuf, &statvfsbuf, &maxwidths);
276 struct statfs *mntbuf;
277 struct statvfs *mntvbuf;
279 mntsize = getmntvinfo(&mntbuf, &mntvbuf, MNT_NOWAIT);
280 for (i = 0; i < mntsize; i++) {
281 if (!strcmp(mntbuf[i].f_mntfromname, name))
282 return (mntbuf[i].f_mntonname);
288 * Make a pass over the filesystem info in ``mntbuf'' filtering out
289 * filesystem types not in vfslist and possibly re-stating to get
290 * current (not cached) info. Returns the new count of valid statfs bufs.
293 regetmntinfo(struct statfs **mntbufp, struct statvfs **mntvbufp, long mntsize, char **vfslist)
296 struct statfs *mntbuf;
297 struct statvfs *mntvbuf;
300 return (nflag ? mntsize : getmntvinfo(mntbufp, mntvbufp, MNT_WAIT));
304 for (j = 0, i = 0; i < mntsize; i++) {
305 if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
308 statfs(mntbuf[i].f_mntonname,&mntbuf[j]);
309 statvfs(mntbuf[i].f_mntonname,&mntvbuf[j]);
311 mntbuf[j] = mntbuf[i];
312 mntvbuf[j] = mntvbuf[i];
320 prthuman(struct statvfs *vsfsp, int64_t used)
322 prthumanval(vsfsp->f_blocks * vsfsp->f_bsize);
323 prthumanval(used * vsfsp->f_bsize);
324 prthumanval(vsfsp->f_bavail * vsfsp->f_bsize);
328 prthumanval(int64_t bytes)
333 flags = HN_B | HN_NOSPACE | HN_DECIMAL;
334 if (hflag == UNITS_SI)
335 flags |= HN_DIVISOR_1000;
337 humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1),
338 bytes, "", HN_AUTOSCALE, flags);
344 * Convert statfs returned filesystem size into BLOCKSIZE units.
345 * Attempts to avoid overflow for large filesystems.
348 fsbtoblk(int64_t num, uint64_t bsize, u_long reqbsize)
350 if (bsize != 0 && bsize < reqbsize)
351 return (num / (intmax_t)(reqbsize / bsize));
353 return (num * (intmax_t)(bsize / reqbsize));
357 * Print out status about a filesystem.
360 prtstat(struct statfs *sfsp, struct statvfs *vsfsp, struct maxwidths *mwp)
362 static long blocksize;
363 static int headerlen, timesthrough;
364 static const char *header;
365 int64_t used, availblks, inodes;
367 if (++timesthrough == 1) {
368 mwp->mntfrom = imax(mwp->mntfrom, strlen("Filesystem"));
371 mwp->total = mwp->used = mwp->avail = strlen(header);
373 header = getbsize(&headerlen, &blocksize);
374 mwp->total = imax(mwp->total, headerlen);
376 mwp->used = imax(mwp->used, strlen("Used"));
377 mwp->avail = imax(mwp->avail, strlen("Avail"));
379 printf("%-*s %-*s %*s %*s Capacity", mwp->mntfrom,
380 "Filesystem", mwp->total, header, mwp->used, "Used",
381 mwp->avail, "Avail");
383 mwp->iused = imax(mwp->iused, strlen(" iused"));
384 mwp->ifree = imax(mwp->ifree, strlen("ifree"));
385 printf(" %*s %*s %%iused", mwp->iused - 2,
386 "iused", mwp->ifree, "ifree");
388 printf(" Mounted on\n");
390 printf("%-*s", mwp->mntfrom, sfsp->f_mntfromname);
391 used = vsfsp->f_blocks - vsfsp->f_bfree;
392 availblks = vsfsp->f_bavail + used;
394 prthuman(vsfsp, used);
396 printf(" %*jd %*jd %*jd", mwp->total,
397 fsbtoblk(vsfsp->f_blocks, vsfsp->f_bsize, blocksize),
398 mwp->used, fsbtoblk(used, vsfsp->f_bsize, blocksize),
399 mwp->avail, fsbtoblk(vsfsp->f_bavail, vsfsp->f_bsize,
403 availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
405 inodes = vsfsp->f_files;
406 used = inodes - vsfsp->f_ffree;
407 printf(" %*jd %*jd %4.0f%% ", mwp->iused, (intmax_t)used,
408 mwp->ifree, (intmax_t)vsfsp->f_ffree, inodes == 0 ? 100.0 :
409 (double)used / (double)inodes * 100.0);
412 printf(" %s\n", sfsp->f_mntonname);
416 * Update the maximum field-width information in `mwp' based on
417 * the filesystem specified by `sfsp'.
420 update_maxwidths(struct maxwidths *mwp, struct statfs *sfsp, struct statvfs *vsfsp)
422 static long blocksize;
426 getbsize(&dummy, &blocksize);
428 mwp->mntfrom = imax(mwp->mntfrom, strlen(sfsp->f_mntfromname));
429 mwp->total = imax(mwp->total, quadwidth(fsbtoblk(vsfsp->f_blocks,
430 vsfsp->f_bsize, blocksize)));
431 mwp->used = imax(mwp->used, quadwidth(fsbtoblk(vsfsp->f_blocks -
432 vsfsp->f_bfree, vsfsp->f_bsize, blocksize)));
433 mwp->avail = imax(mwp->avail, quadwidth(fsbtoblk(vsfsp->f_bavail,
434 vsfsp->f_bsize, blocksize)));
435 mwp->iused = imax(mwp->iused, quadwidth(vsfsp->f_files -
437 mwp->ifree = imax(mwp->ifree, quadwidth(vsfsp->f_ffree));
440 /* Return the width in characters of the specified long. */
442 quadwidth(int64_t val)
447 /* Negative or zero values require one extra digit. */
460 * This code constitutes the pre-system call Berkeley df code for extracting
461 * information from filesystem superblocks.
468 #define sblock sb.iu_fs
473 ufs_df(char *file, struct maxwidths *mwp)
475 struct statfs statfsbuf;
476 struct statvfs statvfsbuf;
478 struct statvfs *vsfsp;
485 if ((rfd = open(file, O_RDONLY)) < 0) {
489 if (bread((off_t)SBOFF, &sblock, SBSIZE) == 0) {
496 strcpy(sfsp->f_fstypename, "ufs");
498 sfsp->f_bsize = vsfsp->f_bsize = sblock.fs_fsize;
499 sfsp->f_iosize = vsfsp->f_frsize = sblock.fs_bsize;
500 sfsp->f_blocks = vsfsp->f_blocks = sblock.fs_dsize;
501 sfsp->f_bfree = vsfsp->f_bfree =
502 sblock.fs_cstotal.cs_nbfree * sblock.fs_frag +
503 sblock.fs_cstotal.cs_nffree;
504 sfsp->f_bavail = vsfsp->f_bavail = freespace(&sblock, sblock.fs_minfree);
505 sfsp->f_files = vsfsp->f_files = sblock.fs_ncg * sblock.fs_ipg;
506 sfsp->f_ffree = vsfsp->f_ffree = sblock.fs_cstotal.cs_nifree;
507 sfsp->f_fsid.val[0] = 0;
508 sfsp->f_fsid.val[1] = 0;
509 if ((mntpt = getmntpt(file)) == NULL)
511 memmove(&sfsp->f_mntonname[0], mntpt, (size_t)MNAMELEN);
512 memmove(&sfsp->f_mntfromname[0], file, (size_t)MNAMELEN);
513 prtstat(sfsp, vsfsp, mwp);
519 bread(off_t off, void *buf, int cnt)
523 lseek(rfd, off, SEEK_SET);
524 if ((nr = read(rfd, buf, (size_t)cnt)) != (ssize_t)cnt) {
525 /* Probably a dismounted disk if errno == EIO. */
527 fprintf(stderr, "\ndf: %lld: %s\n",
528 (long long)off, strerror(nr > 0 ? EIO : errno));
539 "usage: df [-b | -H | -h | -k | -m | -P] [-ailn] [-t type] [file | filesystem ...]\n");
546 char *str, *strptr, **listptr;
547 int mib[3], maxvfsconf, cnt=0, i;
549 struct ovfsconf *ptr;
551 mib[0] = CTL_VFS; mib[1] = VFS_GENERIC; mib[2] = VFS_MAXTYPENUM;
552 miblen=sizeof(maxvfsconf);
553 if (sysctl(mib, (unsigned int)(sizeof(mib) / sizeof(mib[0])),
554 &maxvfsconf, &miblen, NULL, 0)) {
555 warnx("sysctl failed");
559 if ((listptr = malloc(sizeof(char*) * maxvfsconf)) == NULL) {
560 warnx("malloc failed");
564 for (ptr = getvfsent(); ptr; ptr = getvfsent())
565 if (ptr->vfc_flags & VFCF_NETWORK) {
566 listptr[cnt++] = strdup(ptr->vfc_name);
567 if (listptr[cnt-1] == NULL) {
568 warnx("malloc failed");
574 (str = malloc(sizeof(char) * (32 * cnt + cnt + 2))) == NULL) {
576 warnx("malloc failed");
581 *str = 'n'; *(str + 1) = 'o';
582 for (i = 0, strptr = str + 2; i < cnt; i++, strptr++) {
583 strncpy(strptr, listptr[i], 32);
584 strptr += strlen(listptr[i]);