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
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19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
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22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
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38 * @(#) Copyright (c) 1980, 1990, 1993, 1994 The Regents of the University of California. All rights reserved.
39 * @(#)df.c 8.9 (Berkeley) 5/8/95
40 * $FreeBSD: src/bin/df/df.c,v 1.23.2.9 2002/07/01 00:14:24 iedowse Exp $
41 * $DragonFly: src/bin/df/df.c,v 1.8 2006/04/03 01:58:43 dillon Exp $
44 #include <sys/cdefs.h>
45 #include <sys/param.h>
47 #include <sys/mount.h>
48 #include <sys/sysctl.h>
50 #include <vfs/ufs/dinode.h>
51 #include <vfs/ufs/fs.h>
52 #include <vfs/ufs/ufsmount.h>
68 #define KILO_SZ(n) (n)
69 #define MEGA_SZ(n) ((n) * (n))
70 #define GIGA_SZ(n) ((n) * (n) * (n))
71 #define TERA_SZ(n) ((n) * (n) * (n) * (n))
72 #define PETA_SZ(n) ((n) * (n) * (n) * (n) * (n))
74 #define KILO_2_SZ (KILO_SZ(1024ULL))
75 #define MEGA_2_SZ (MEGA_SZ(1024ULL))
76 #define GIGA_2_SZ (GIGA_SZ(1024ULL))
77 #define TERA_2_SZ (TERA_SZ(1024ULL))
78 #define PETA_2_SZ (PETA_SZ(1024ULL))
80 #define KILO_SI_SZ (KILO_SZ(1000ULL))
81 #define MEGA_SI_SZ (MEGA_SZ(1000ULL))
82 #define GIGA_SI_SZ (GIGA_SZ(1000ULL))
83 #define TERA_SI_SZ (TERA_SZ(1000ULL))
84 #define PETA_SI_SZ (PETA_SZ(1000ULL))
86 /* Maximum widths of various fields. */
96 unsigned long long vals_si [] = {1, KILO_SI_SZ, MEGA_SI_SZ, GIGA_SI_SZ, TERA_SI_SZ, PETA_SI_SZ};
97 unsigned long long vals_base2[] = {1, KILO_2_SZ, MEGA_2_SZ, GIGA_2_SZ, TERA_2_SZ, PETA_2_SZ};
98 unsigned long long *valp;
100 typedef enum { NONE, KILO, MEGA, GIGA, TERA, PETA, UNIT_MAX } unit_t;
102 unit_t unitp [] = { NONE, KILO, MEGA, GIGA, TERA, PETA };
104 int bread(off_t, void *, int);
105 int checkvfsname(const char *, char **);
106 char *getmntpt(char *);
108 char *makenetvfslist(void);
109 char **makevfslist(char *);
110 void prthuman(struct statfs *, long);
111 void prthumanval(double);
112 void prtstat(struct statfs *, struct maxwidths *);
113 long regetmntinfo(struct statfs **, long, char **);
114 int ufs_df(char *, struct maxwidths *);
115 unit_t unit_adjust(double *);
116 void update_maxwidths(struct maxwidths *, struct statfs *);
119 int aflag = 0, hflag, iflag, nflag;
120 struct ufs_args mdev;
125 return (a > b ? a : b);
129 main(int argc, char **argv)
132 struct statfs statfsbuf, *mntbuf;
133 struct maxwidths maxwidths;
135 char *mntpath, *mntpt, **vfslist;
142 while ((ch = getopt(argc, argv, "abgHhiklmnPt:")) != -1)
150 if (putenv("BLOCKSIZE=512") != 0)
151 warn("putenv: cannot set BLOCKSIZE=512");
155 if (putenv("BLOCKSIZE=1g") != 0)
156 warn("putenv: cannot set BLOCKSIZE=1g");
171 if (putenv("BLOCKSIZE=1k") != 0)
172 warn("putenv: cannot set BLOCKSIZE=1k");
177 errx(1, "-l and -t are mutually exclusive.");
178 vfslist = makevfslist(makenetvfslist());
181 if (putenv("BLOCKSIZE=1m") != 0)
182 warn("putenv: cannot set BLOCKSIZE=1m");
190 errx(1, "only one -t option may be specified");
192 vfslist = makevfslist(optarg);
201 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
202 bzero(&maxwidths, sizeof(maxwidths));
203 for (i = 0; i < mntsize; i++)
204 update_maxwidths(&maxwidths, &mntbuf[i]);
208 mntsize = regetmntinfo(&mntbuf, mntsize, vfslist);
209 bzero(&maxwidths, sizeof(maxwidths));
210 for (i = 0; i < mntsize; i++)
211 update_maxwidths(&maxwidths, &mntbuf[i]);
212 for (i = 0; i < mntsize; i++) {
213 if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0)
214 prtstat(&mntbuf[i], &maxwidths);
219 for (; *argv; argv++) {
220 if (stat(*argv, &stbuf) < 0) {
221 if ((mntpt = getmntpt(*argv)) == 0) {
226 } else if (S_ISCHR(stbuf.st_mode)) {
227 if ((mntpt = getmntpt(*argv)) == 0) {
229 mntpath = strdup("/tmp/df.XXXXXX");
230 if (mntpath == NULL) {
231 warn("strdup failed");
235 mntpt = mkdtemp(mntpath);
237 warn("mkdtemp(\"%s\") failed", mntpath);
242 if (mount(fstype, mntpt, MNT_RDONLY,
244 rv = ufs_df(*argv, &maxwidths) || rv;
248 } else if (statfs(mntpt, &statfsbuf) == 0) {
249 statfsbuf.f_mntonname[0] = '\0';
250 prtstat(&statfsbuf, &maxwidths);
263 * Statfs does not take a `wait' flag, so we cannot
264 * implement nflag here.
266 if (statfs(mntpt, &statfsbuf) < 0) {
272 bzero(&maxwidths, sizeof(maxwidths));
273 update_maxwidths(&maxwidths, &statfsbuf);
275 prtstat(&statfsbuf, &maxwidths);
284 struct statfs *mntbuf;
286 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
287 for (i = 0; i < mntsize; i++) {
288 if (!strcmp(mntbuf[i].f_mntfromname, name))
289 return (mntbuf[i].f_mntonname);
295 * Make a pass over the filesystem info in ``mntbuf'' filtering out
296 * filesystem types not in vfslist and possibly re-stating to get
297 * current (not cached) info. Returns the new count of valid statfs bufs.
300 regetmntinfo(struct statfs **mntbufp, long mntsize, char **vfslist)
303 struct statfs *mntbuf;
306 return (nflag ? mntsize : getmntinfo(mntbufp, MNT_WAIT));
309 for (j = 0, i = 0; i < mntsize; i++) {
310 if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
313 statfs(mntbuf[i].f_mntonname,&mntbuf[j]);
315 mntbuf[j] = mntbuf[i];
322 * Output in "human-readable" format. Uses 3 digits max and puts
323 * unit suffixes at the end. Makes output compact and easy to read,
324 * especially on huge disks.
328 unit_adjust(double *val)
332 unsigned int unit_sz;
336 unit_sz = abval ? ilogb(abval) / 10 : 0;
338 if (unit_sz >= UNIT_MAX) {
341 unit = unitp[unit_sz];
342 *val /= (double)valp[unit_sz];
349 prthuman(struct statfs *sfsp, long used)
352 prthumanval((double)sfsp->f_blocks * (double)sfsp->f_bsize);
353 prthumanval((double)used * (double)sfsp->f_bsize);
354 prthumanval((double)sfsp->f_bavail * (double)sfsp->f_bsize);
358 prthumanval(double bytes)
362 unit = unit_adjust(&bytes);
367 printf(" %5.0f%c", bytes, "BKMGTPE"[unit]);
369 printf(" %5.1f%c", bytes, "BKMGTPE"[unit]);
373 * Convert statfs returned filesystem size into BLOCKSIZE units.
374 * Attempts to avoid overflow for large filesystems.
376 #define fsbtoblk(num, fsbs, bs) \
377 (((fsbs) != 0 && (fsbs) < (bs)) ? \
378 (num) / ((bs) / (fsbs)) : (num) * ((fsbs) / (bs)))
381 * Print out status about a filesystem.
384 prtstat(struct statfs *sfsp, struct maxwidths *mwp)
386 static long blocksize;
387 static int headerlen, timesthrough;
388 static const char *header;
389 long used, availblks, inodes;
391 if (++timesthrough == 1) {
392 mwp->mntfrom = imax(mwp->mntfrom, strlen("Filesystem"));
395 mwp->total = mwp->used = mwp->avail = strlen(header);
397 header = getbsize(&headerlen, &blocksize);
398 mwp->total = imax(mwp->total, headerlen);
400 mwp->used = imax(mwp->used, strlen("Used"));
401 mwp->avail = imax(mwp->avail, strlen("Avail"));
403 printf("%-*s %-*s %*s %*s Capacity", mwp->mntfrom,
404 "Filesystem", mwp->total, header, mwp->used, "Used",
405 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);
415 used = sfsp->f_blocks - sfsp->f_bfree;
416 availblks = sfsp->f_bavail + used;
418 prthuman(sfsp, used);
420 printf(" %*ld %*ld %*ld", mwp->total,
421 fsbtoblk(sfsp->f_blocks, sfsp->f_bsize, blocksize),
422 mwp->used, fsbtoblk(used, sfsp->f_bsize, blocksize),
423 mwp->avail, fsbtoblk(sfsp->f_bavail, sfsp->f_bsize,
427 availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
429 inodes = sfsp->f_files;
430 used = inodes - sfsp->f_ffree;
431 printf(" %*ld %*ld %4.0f%% ", mwp->iused, used,
432 mwp->ifree, sfsp->f_ffree, inodes == 0 ? 100.0 :
433 (double)used / (double)inodes * 100.0);
436 printf(" %s\n", sfsp->f_mntonname);
440 * Update the maximum field-width information in `mwp' based on
441 * the filesystem specified by `sfsp'.
444 update_maxwidths(struct maxwidths *mwp, struct statfs *sfsp)
446 static long blocksize;
450 getbsize(&dummy, &blocksize);
452 mwp->mntfrom = imax(mwp->mntfrom, strlen(sfsp->f_mntfromname));
453 mwp->total = imax(mwp->total, longwidth(fsbtoblk(sfsp->f_blocks,
454 sfsp->f_bsize, blocksize)));
455 mwp->used = imax(mwp->used, longwidth(fsbtoblk(sfsp->f_blocks -
456 sfsp->f_bfree, sfsp->f_bsize, blocksize)));
457 mwp->avail = imax(mwp->avail, longwidth(fsbtoblk(sfsp->f_bavail,
458 sfsp->f_bsize, blocksize)));
459 mwp->iused = imax(mwp->iused, longwidth(sfsp->f_files -
461 mwp->ifree = imax(mwp->ifree, longwidth(sfsp->f_ffree));
464 /* Return the width in characters of the specified long. */
471 /* Negative or zero values require one extra digit. */
485 * This code constitutes the pre-system call Berkeley df code for extracting
486 * information from filesystem superblocks.
493 #define sblock sb.iu_fs
498 ufs_df(char *file, struct maxwidths *mwp)
500 struct statfs statfsbuf;
508 if ((rfd = open(file, O_RDONLY)) < 0) {
512 if (bread((off_t)SBOFF, &sblock, SBSIZE) == 0) {
518 strcpy(sfsp->f_fstypename, "ufs");
520 sfsp->f_bsize = sblock.fs_fsize;
521 sfsp->f_iosize = sblock.fs_bsize;
522 sfsp->f_blocks = sblock.fs_dsize;
523 sfsp->f_bfree = sblock.fs_cstotal.cs_nbfree * sblock.fs_frag +
524 sblock.fs_cstotal.cs_nffree;
525 sfsp->f_bavail = freespace(&sblock, sblock.fs_minfree);
526 sfsp->f_files = sblock.fs_ncg * sblock.fs_ipg;
527 sfsp->f_ffree = sblock.fs_cstotal.cs_nifree;
528 sfsp->f_fsid.val[0] = 0;
529 sfsp->f_fsid.val[1] = 0;
530 if ((mntpt = getmntpt(file)) == 0)
532 memmove(&sfsp->f_mntonname[0], mntpt, (size_t)MNAMELEN);
533 memmove(&sfsp->f_mntfromname[0], file, (size_t)MNAMELEN);
540 bread(off_t off, void *buf, int cnt)
544 lseek(rfd, off, SEEK_SET);
545 if ((nr = read(rfd, buf, (size_t)cnt)) != (ssize_t)cnt) {
546 /* Probably a dismounted disk if errno == EIO. */
548 fprintf(stderr, "\ndf: %lld: %s\n",
549 (long long)off, strerror(nr > 0 ? EIO : errno));
560 "usage: df [-b | -H | -h | -k | -m | -P] [-ailn] [-t type] [file | filesystem ...]\n");
567 char *str, *strptr, **listptr;
568 int mib[3], maxvfsconf, cnt=0, i;
570 struct ovfsconf *ptr;
572 mib[0] = CTL_VFS; mib[1] = VFS_GENERIC; mib[2] = VFS_MAXTYPENUM;
573 miblen=sizeof(maxvfsconf);
574 if (sysctl(mib, (unsigned int)(sizeof(mib) / sizeof(mib[0])),
575 &maxvfsconf, &miblen, NULL, 0)) {
576 warnx("sysctl failed");
580 if ((listptr = malloc(sizeof(char*) * maxvfsconf)) == NULL) {
581 warnx("malloc failed");
585 for (ptr = getvfsent(); ptr; ptr = getvfsent())
586 if (ptr->vfc_flags & VFCF_NETWORK) {
587 listptr[cnt++] = strdup(ptr->vfc_name);
588 if (listptr[cnt-1] == NULL) {
589 warnx("malloc failed");
595 (str = malloc(sizeof(char) * (32 * cnt + cnt + 2))) == NULL) {
597 warnx("malloc failed");
602 *str = 'n'; *(str + 1) = 'o';
603 for (i = 0, strptr = str + 2; i < cnt; i++, strptr++) {
604 strncpy(strptr, listptr[i], 32);
605 strptr += strlen(listptr[i]);