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
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14 * notice, this list of conditions and the following disclaimer.
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19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
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 1.7 2006/01/12 13:43:10 corecode Exp $
44 #include <sys/cdefs.h>
45 #include <sys/param.h>
47 #include <sys/mount.h>
48 #include <sys/sysctl.h>
49 #include <vfs/ufs/ufsmount.h>
50 #include <vfs/ufs/fs.h>
66 #define KILO_SZ(n) (n)
67 #define MEGA_SZ(n) ((n) * (n))
68 #define GIGA_SZ(n) ((n) * (n) * (n))
69 #define TERA_SZ(n) ((n) * (n) * (n) * (n))
70 #define PETA_SZ(n) ((n) * (n) * (n) * (n) * (n))
72 #define KILO_2_SZ (KILO_SZ(1024ULL))
73 #define MEGA_2_SZ (MEGA_SZ(1024ULL))
74 #define GIGA_2_SZ (GIGA_SZ(1024ULL))
75 #define TERA_2_SZ (TERA_SZ(1024ULL))
76 #define PETA_2_SZ (PETA_SZ(1024ULL))
78 #define KILO_SI_SZ (KILO_SZ(1000ULL))
79 #define MEGA_SI_SZ (MEGA_SZ(1000ULL))
80 #define GIGA_SI_SZ (GIGA_SZ(1000ULL))
81 #define TERA_SI_SZ (TERA_SZ(1000ULL))
82 #define PETA_SI_SZ (PETA_SZ(1000ULL))
84 /* Maximum widths of various fields. */
94 unsigned long long vals_si [] = {1, KILO_SI_SZ, MEGA_SI_SZ, GIGA_SI_SZ, TERA_SI_SZ, PETA_SI_SZ};
95 unsigned long long vals_base2[] = {1, KILO_2_SZ, MEGA_2_SZ, GIGA_2_SZ, TERA_2_SZ, PETA_2_SZ};
96 unsigned long long *valp;
98 typedef enum { NONE, KILO, MEGA, GIGA, TERA, PETA, UNIT_MAX } unit_t;
100 unit_t unitp [] = { NONE, KILO, MEGA, GIGA, TERA, PETA };
102 int bread(off_t, void *, int);
103 int checkvfsname(const char *, char **);
104 char *getmntpt(char *);
106 char *makenetvfslist(void);
107 char **makevfslist(char *);
108 void prthuman(struct statfs *, long);
109 void prthumanval(double);
110 void prtstat(struct statfs *, struct maxwidths *);
111 long regetmntinfo(struct statfs **, long, char **);
112 int ufs_df(char *, struct maxwidths *);
113 unit_t unit_adjust(double *);
114 void update_maxwidths(struct maxwidths *, struct statfs *);
117 int aflag = 0, hflag, iflag, nflag;
118 struct ufs_args mdev;
123 return (a > b ? a : b);
127 main(int argc, char **argv)
130 struct statfs statfsbuf, *mntbuf;
131 struct maxwidths maxwidths;
133 char *mntpath, *mntpt, **vfslist;
140 while ((ch = getopt(argc, argv, "abgHhiklmnPt:")) != -1)
148 if (putenv("BLOCKSIZE=512") != 0)
149 warn("putenv: cannot set BLOCKSIZE=512");
153 if (putenv("BLOCKSIZE=1g") != 0)
154 warn("putenv: cannot set BLOCKSIZE=1g");
169 if (putenv("BLOCKSIZE=1k") != 0)
170 warn("putenv: cannot set BLOCKSIZE=1k");
175 errx(1, "-l and -t are mutually exclusive.");
176 vfslist = makevfslist(makenetvfslist());
179 if (putenv("BLOCKSIZE=1m") != 0)
180 warn("putenv: cannot set BLOCKSIZE=1m");
188 errx(1, "only one -t option may be specified");
190 vfslist = makevfslist(optarg);
199 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
200 bzero(&maxwidths, sizeof(maxwidths));
201 for (i = 0; i < mntsize; i++)
202 update_maxwidths(&maxwidths, &mntbuf[i]);
206 mntsize = regetmntinfo(&mntbuf, mntsize, vfslist);
207 bzero(&maxwidths, sizeof(maxwidths));
208 for (i = 0; i < mntsize; i++)
209 update_maxwidths(&maxwidths, &mntbuf[i]);
210 for (i = 0; i < mntsize; i++) {
211 if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0)
212 prtstat(&mntbuf[i], &maxwidths);
217 for (; *argv; argv++) {
218 if (stat(*argv, &stbuf) < 0) {
219 if ((mntpt = getmntpt(*argv)) == 0) {
224 } else if (S_ISCHR(stbuf.st_mode)) {
225 if ((mntpt = getmntpt(*argv)) == 0) {
227 mntpath = strdup("/tmp/df.XXXXXX");
228 if (mntpath == NULL) {
229 warn("strdup failed");
233 mntpt = mkdtemp(mntpath);
235 warn("mkdtemp(\"%s\") failed", mntpath);
240 if (mount(fstype, mntpt, MNT_RDONLY,
242 rv = ufs_df(*argv, &maxwidths) || rv;
246 } else if (statfs(mntpt, &statfsbuf) == 0) {
247 statfsbuf.f_mntonname[0] = '\0';
248 prtstat(&statfsbuf, &maxwidths);
261 * Statfs does not take a `wait' flag, so we cannot
262 * implement nflag here.
264 if (statfs(mntpt, &statfsbuf) < 0) {
270 bzero(&maxwidths, sizeof(maxwidths));
271 update_maxwidths(&maxwidths, &statfsbuf);
273 prtstat(&statfsbuf, &maxwidths);
282 struct statfs *mntbuf;
284 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
285 for (i = 0; i < mntsize; i++) {
286 if (!strcmp(mntbuf[i].f_mntfromname, name))
287 return (mntbuf[i].f_mntonname);
293 * Make a pass over the filesystem info in ``mntbuf'' filtering out
294 * filesystem types not in vfslist and possibly re-stating to get
295 * current (not cached) info. Returns the new count of valid statfs bufs.
298 regetmntinfo(struct statfs **mntbufp, long mntsize, char **vfslist)
301 struct statfs *mntbuf;
304 return (nflag ? mntsize : getmntinfo(mntbufp, MNT_WAIT));
307 for (j = 0, i = 0; i < mntsize; i++) {
308 if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
311 statfs(mntbuf[i].f_mntonname,&mntbuf[j]);
313 mntbuf[j] = mntbuf[i];
320 * Output in "human-readable" format. Uses 3 digits max and puts
321 * unit suffixes at the end. Makes output compact and easy to read,
322 * especially on huge disks.
326 unit_adjust(double *val)
330 unsigned int unit_sz;
334 unit_sz = abval ? ilogb(abval) / 10 : 0;
336 if (unit_sz >= UNIT_MAX) {
339 unit = unitp[unit_sz];
340 *val /= (double)valp[unit_sz];
347 prthuman(struct statfs *sfsp, long used)
350 prthumanval((double)sfsp->f_blocks * (double)sfsp->f_bsize);
351 prthumanval((double)used * (double)sfsp->f_bsize);
352 prthumanval((double)sfsp->f_bavail * (double)sfsp->f_bsize);
356 prthumanval(double bytes)
360 unit = unit_adjust(&bytes);
365 printf(" %5.0f%c", bytes, "BKMGTPE"[unit]);
367 printf(" %5.1f%c", bytes, "BKMGTPE"[unit]);
371 * Convert statfs returned filesystem size into BLOCKSIZE units.
372 * Attempts to avoid overflow for large filesystems.
374 #define fsbtoblk(num, fsbs, bs) \
375 (((fsbs) != 0 && (fsbs) < (bs)) ? \
376 (num) / ((bs) / (fsbs)) : (num) * ((fsbs) / (bs)))
379 * Print out status about a filesystem.
382 prtstat(struct statfs *sfsp, struct maxwidths *mwp)
384 static long blocksize;
385 static int headerlen, timesthrough;
386 static const char *header;
387 long used, availblks, inodes;
389 if (++timesthrough == 1) {
390 mwp->mntfrom = imax(mwp->mntfrom, strlen("Filesystem"));
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 %-*s %*s %*s Capacity", mwp->mntfrom,
402 "Filesystem", mwp->total, header, mwp->used, "Used",
403 mwp->avail, "Avail");
405 mwp->iused = imax(mwp->iused, strlen(" iused"));
406 mwp->ifree = imax(mwp->ifree, strlen("ifree"));
407 printf(" %*s %*s %%iused", mwp->iused - 2,
408 "iused", mwp->ifree, "ifree");
410 printf(" Mounted on\n");
412 printf("%-*s", mwp->mntfrom, sfsp->f_mntfromname);
413 used = sfsp->f_blocks - sfsp->f_bfree;
414 availblks = sfsp->f_bavail + used;
416 prthuman(sfsp, used);
418 printf(" %*ld %*ld %*ld", mwp->total,
419 fsbtoblk(sfsp->f_blocks, sfsp->f_bsize, blocksize),
420 mwp->used, fsbtoblk(used, sfsp->f_bsize, blocksize),
421 mwp->avail, fsbtoblk(sfsp->f_bavail, sfsp->f_bsize,
425 availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
427 inodes = sfsp->f_files;
428 used = inodes - sfsp->f_ffree;
429 printf(" %*ld %*ld %4.0f%% ", mwp->iused, used,
430 mwp->ifree, sfsp->f_ffree, inodes == 0 ? 100.0 :
431 (double)used / (double)inodes * 100.0);
434 printf(" %s\n", sfsp->f_mntonname);
438 * Update the maximum field-width information in `mwp' based on
439 * the filesystem specified by `sfsp'.
442 update_maxwidths(struct maxwidths *mwp, struct statfs *sfsp)
444 static long blocksize;
448 getbsize(&dummy, &blocksize);
450 mwp->mntfrom = imax(mwp->mntfrom, strlen(sfsp->f_mntfromname));
451 mwp->total = imax(mwp->total, longwidth(fsbtoblk(sfsp->f_blocks,
452 sfsp->f_bsize, blocksize)));
453 mwp->used = imax(mwp->used, longwidth(fsbtoblk(sfsp->f_blocks -
454 sfsp->f_bfree, sfsp->f_bsize, blocksize)));
455 mwp->avail = imax(mwp->avail, longwidth(fsbtoblk(sfsp->f_bavail,
456 sfsp->f_bsize, blocksize)));
457 mwp->iused = imax(mwp->iused, longwidth(sfsp->f_files -
459 mwp->ifree = imax(mwp->ifree, longwidth(sfsp->f_ffree));
462 /* Return the width in characters of the specified long. */
469 /* Negative or zero values require one extra digit. */
483 * This code constitutes the pre-system call Berkeley df code for extracting
484 * information from filesystem superblocks.
491 #define sblock sb.iu_fs
496 ufs_df(char *file, struct maxwidths *mwp)
498 struct statfs statfsbuf;
506 if ((rfd = open(file, O_RDONLY)) < 0) {
510 if (bread((off_t)SBOFF, &sblock, SBSIZE) == 0) {
516 strcpy(sfsp->f_fstypename, "ufs");
518 sfsp->f_bsize = sblock.fs_fsize;
519 sfsp->f_iosize = sblock.fs_bsize;
520 sfsp->f_blocks = sblock.fs_dsize;
521 sfsp->f_bfree = sblock.fs_cstotal.cs_nbfree * sblock.fs_frag +
522 sblock.fs_cstotal.cs_nffree;
523 sfsp->f_bavail = freespace(&sblock, sblock.fs_minfree);
524 sfsp->f_files = sblock.fs_ncg * sblock.fs_ipg;
525 sfsp->f_ffree = sblock.fs_cstotal.cs_nifree;
526 sfsp->f_fsid.val[0] = 0;
527 sfsp->f_fsid.val[1] = 0;
528 if ((mntpt = getmntpt(file)) == 0)
530 memmove(&sfsp->f_mntonname[0], mntpt, (size_t)MNAMELEN);
531 memmove(&sfsp->f_mntfromname[0], file, (size_t)MNAMELEN);
538 bread(off_t off, void *buf, int cnt)
542 lseek(rfd, off, SEEK_SET);
543 if ((nr = read(rfd, buf, (size_t)cnt)) != (ssize_t)cnt) {
544 /* Probably a dismounted disk if errno == EIO. */
546 fprintf(stderr, "\ndf: %lld: %s\n",
547 (long long)off, strerror(nr > 0 ? EIO : errno));
558 "usage: df [-b | -H | -h | -k | -m | -P] [-ailn] [-t type] [file | filesystem ...]\n");
565 char *str, *strptr, **listptr;
566 int mib[3], maxvfsconf, cnt=0, i;
568 struct ovfsconf *ptr;
570 mib[0] = CTL_VFS; mib[1] = VFS_GENERIC; mib[2] = VFS_MAXTYPENUM;
571 miblen=sizeof(maxvfsconf);
572 if (sysctl(mib, (unsigned int)(sizeof(mib) / sizeof(mib[0])),
573 &maxvfsconf, &miblen, NULL, 0)) {
574 warnx("sysctl failed");
578 if ((listptr = malloc(sizeof(char*) * maxvfsconf)) == NULL) {
579 warnx("malloc failed");
583 for (ptr = getvfsent(); ptr; ptr = getvfsent())
584 if (ptr->vfc_flags & VFCF_NETWORK) {
585 listptr[cnt++] = strdup(ptr->vfc_name);
586 if (listptr[cnt-1] == NULL) {
587 warnx("malloc failed");
593 (str = malloc(sizeof(char) * (32 * cnt + cnt + 2))) == NULL) {
595 warnx("malloc failed");
600 *str = 'n'; *(str + 1) = 'o';
601 for (i = 0, strptr = str + 2; i < cnt; i++, strptr++) {
602 strncpy(strptr, listptr[i], 32);
603 strptr += strlen(listptr[i]);