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1 /*

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.

9 *

10 * Redistribution and use in source and binary forms, with or without

11 * modification, are permitted provided that the following conditions

12 * are met:

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

16 * notice, this list of conditions and the following disclaimer in the

17 * documentation and/or other materials provided with the distribution.

18 * 3. All advertising materials mentioning features or use of this software

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

24 * without specific prior written permission.

25 *

26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

36 * SUCH DAMAGE.

37 */

39 #include <sys/cdefs.h>

40 #ifndef lint

41 __used static const char copyright[] =

44 #endif /* not lint */

46 #ifndef lint

47 #if 0

48 static char sccsid[] = "@(#)df.c 8.9 (Berkeley) 5/8/95";

49 #else

50 __used static const char rcsid[] =

51 "$FreeBSD: src/bin/df/df.c,v 1.23.2.9 2002/07/01 00:14:24 iedowse Exp $";

52 #endif

53 #endif /* not lint */

55 #ifdef __APPLE__

56 #define MNT_IGNORE 0

57 #endif

59 #include <sys/cdefs.h>

60 #include <sys/param.h>

61 #include <sys/stat.h>

62 #include <sys/mount.h>

63 #include <sys/sysctl.h>

64 #include <err.h>

65 #include <errno.h>

66 #include <fcntl.h>

67 #include <fstab.h>

68 #include <math.h>

69 #include <stdio.h>

70 #include <stdlib.h>

71 #include <string.h>

72 #include <sysexits.h>

73 #include <unistd.h>

74 #include <libutil.h>

76 #ifdef __APPLE__

77 #include "get_compat.h"

78 #else

79 #define COMPAT_MODE(func, mode) 1

80 #endif

82 #define UNITS_SI 1

83 #define UNITS_2 2

85 #define KILO_SZ(n) (n)

86 #define MEGA_SZ(n) ((n) * (n))

87 #define GIGA_SZ(n) ((n) * (n) * (n))

88 #define TERA_SZ(n) ((n) * (n) * (n) * (n))

89 #define PETA_SZ(n) ((n) * (n) * (n) * (n) * (n))

91 #define KILO_2_SZ (KILO_SZ(1024ULL))

92 #define MEGA_2_SZ (MEGA_SZ(1024ULL))

93 #define GIGA_2_SZ (GIGA_SZ(1024ULL))

94 #define TERA_2_SZ (TERA_SZ(1024ULL))

95 #define PETA_2_SZ (PETA_SZ(1024ULL))

97 #define KILO_SI_SZ (KILO_SZ(1000ULL))

98 #define MEGA_SI_SZ (MEGA_SZ(1000ULL))

99 #define GIGA_SI_SZ (GIGA_SZ(1000ULL))

100 #define TERA_SI_SZ (TERA_SZ(1000ULL))

101 #define PETA_SI_SZ (PETA_SZ(1000ULL))

102

103 /* Maximum widths of various fields. */

104 struct maxwidths {

105 int mntfrom;

106 int total;

107 int used;

108 int avail;

109 int iused;

110 int ifree;

111 };

112

 unsigned long long vals_si [] = {1, KILO_SI_SZ, MEGA_SI_SZ, GIGA_SI_SZ, TERA_SI_SZ, PETA_SI_SZ};

 unsigned long long vals_base2[] = {1, KILO_2_SZ, MEGA_2_SZ, GIGA_2_SZ, TERA_2_SZ, PETA_2_SZ};

115 unsigned long long *valp;

116

 typedef enum { NONE, KILO, MEGA, GIGA, TERA, PETA, UNIT_MAX } unit_t;

118

 unit_t unitp [] = { NONE, KILO, MEGA, GIGA, TERA, PETA };

120

 int       bread(off_t, void *, int);

 int       checkvfsname(const char *, char **);

 char     *getmntpt(char *);

 int       int64width(int64_t);

 char     *makenetvfslist(void);

 char    **makevfslist(const char *);

 void      prthuman(struct statfs *, uint64_t);

 void      prthumanval(int64_t);

 void      prtstat(struct statfs *, struct maxwidths *);

 long      regetmntinfo(struct statfs **, long, char **);

131 unit_t unit_adjust(double *);

 void      update_maxwidths(struct maxwidths *, struct statfs *);

 void      usage(void);

134

 int     aflag = 0, hflag, iflag, nflag;

136

 static __inline int imax(int a, int b)

138 {

         return (a > b ? a : b);

140 }

141

142 int

 main(int argc, char *argv[])

144 {

145 struct stat stbuf;

146 struct statfs statfsbuf, *mntbuf;

147 struct maxwidths maxwidths;

148 char *mntpt, **vfslist;

149 long mntsize;

         int ch, i, rv, tflag = 0, kludge_tflag = 0;

151 int kflag = 0;

         const char *options = "abgHhiklmnPt:T:";

         if (COMPAT_MODE("bin/df", "unix2003")) {

154 /* Unix2003 requires -t be "include total capacity". which df

155 already does, but it conflicts with the old -t so we need to

156 *not* expect a string after -t (we provide -T in both cases

157 to cover the old use of -t) */

158 options = "abgHhiklmnPtT:";

159 iflag = 1;

160 }

161

162 vfslist = NULL;

         while ((ch = getopt(argc, argv, options)) != -1)

164 switch (ch) {

165 case 'a':

166 aflag = 1;

167 break;

168 case 'b':

169 /* FALLTHROUGH */

170 case 'P':

                         if (COMPAT_MODE("bin/df", "unix2003")) {

172 if (!kflag) {

173 /* -k overrides -P */

174 putenv("BLOCKSIZE=512");

175 }

176 iflag = 0;

177 } else {

178 putenv("BLOCKSIZE=512");

179 }

180 hflag = 0;

181 break;

182 case 'g':

183 putenv("BLOCKSIZE=1g");

184 hflag = 0;

185 break;

186 case 'H':

187 hflag = UNITS_SI;

188 valp = vals_si;

189 break;

190 case 'h':

191 hflag = UNITS_2;

192 valp = vals_base2;

193 break;

194 case 'i':

195 iflag = 1;

196 break;

197 case 'k':

                         if (COMPAT_MODE("bin/df", "unix2003")) {

199 putenv("BLOCKSIZE=1024");

200 } else {

201 putenv("BLOCKSIZE=1k");

202 }

203 kflag = 1;

204 hflag = 0;

205 break;

206 case 'l':

207 if (tflag)

                                 errx(1, "-l and -T are mutually exclusive.");

209 if (vfslist != NULL)

210 break;

                         vfslist = makevfslist(makenetvfslist());

212 break;

213 case 'm':

214 putenv("BLOCKSIZE=1m");

215 hflag = 0;

216 break;

217 case 'n':

218 nflag = 1;

219 break;

220 case 't':

221 /* Unix2003 uses -t for something we do by default */

                         if (COMPAT_MODE("bin/df", "unix2003")) {

223 kludge_tflag = 1;

224 break;

225 }

226 case 'T':

227 if (vfslist != NULL) {

228 if (tflag)

                                         errx(1, "only one -%c option may be specified", ch);

230 else

                                         errx(1, "-l and -%c are mutually exclusive.", ch);

232 }

233 tflag++;

234 vfslist = makevfslist(optarg);

235 break;

236 case '?':

237 default:

238 usage();

239 }

240 argc -= optind;

241 argv += optind;

242

243 /* If we are in unix2003 mode, have seen a -t but no -T and the first

244 non switch arg isn't a file, let's pretend they used -T on it.

245 This makes the Lexmark printer installer happy (PR-3918471) */

         if (tflag == 0 && kludge_tflag && *argv && stat(*argv, &stbuf) < 0

247 && errno == ENOENT) {

248 vfslist = makevfslist(*argv++);

249 }

250

         mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);

         bzero(&maxwidths, sizeof(maxwidths));

         for (i = 0; i < mntsize; i++)

                 update_maxwidths(&maxwidths, &mntbuf[i]);

255

256 rv = 0;

257 if (!*argv) {

                 mntsize = regetmntinfo(&mntbuf, mntsize, vfslist);

                 bzero(&maxwidths, sizeof(maxwidths));

                 for (i = 0; i < mntsize; i++)

                         update_maxwidths(&maxwidths, &mntbuf[i]);

                 for (i = 0; i < mntsize; i++) {

                         if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0)

                                 prtstat(&mntbuf[i], &maxwidths);

265 }

266 exit(rv);

267 }

268

269 for (; *argv; argv++) {

                 if (stat(*argv, &stbuf) < 0) {

                         if ((mntpt = getmntpt(*argv)) == 0) {

                                 warn("%s", *argv);

273 rv = 1;

274 continue;

275 }

                 } else if (S_ISCHR(stbuf.st_mode) || S_ISBLK(stbuf.st_mode)) {

                         warnx("%s: Raw devices not supported", *argv);

278 rv = 1;

279 continue;

280 } else

281 mntpt = *argv;

282 /*

283 * Statfs does not take a `wait' flag, so we cannot

284 * implement nflag here.

285 */

                 if (statfs(mntpt, &statfsbuf) < 0) {

                         warn("%s", mntpt);

288 rv = 1;

289 continue;

290 }

291 /* Check to make sure the arguments we've been

292 * given are satisfied. Return an error if we

293 * have been asked to list a mount point that does

294 * not match the other args we've been given (-l, -t, etc.)

295 */

                 if (checkvfsname(statfsbuf.f_fstypename, vfslist)) {

297 rv++;

298 continue;

299 }

300

                 if (argc == 1) {

                         bzero(&maxwidths, sizeof(maxwidths));

303 update_maxwidths(&maxwidths, &statfsbuf);

304 }

305 prtstat(&statfsbuf, &maxwidths);

306 }

307 return (rv);

308 }

309

310 char *

 getmntpt(char *name)

312 {

313 long mntsize, i;

314 struct statfs *mntbuf;

315

         mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);

         for (i = 0; i < mntsize; i++) {

                 if (!strcmp(mntbuf[i].f_mntfromname, name))

                         return (mntbuf[i].f_mntonname);

320 }

321 return (0);

322 }

323

324 /*

325 * Make a pass over the filesystem info in ``mntbuf'' filtering out

326 * filesystem types not in vfslist and possibly re-stating to get

327 * current (not cached) info. Returns the new count of valid statfs bufs.

328 */

329 long

 regetmntinfo(struct statfs **mntbufp, long mntsize, char **vfslist)

331 {

332 int i, j;

333 struct statfs *mntbuf;

334

335 if (vfslist == NULL)

                 return (nflag ? mntsize : getmntinfo(mntbufp, MNT_WAIT));

337

338 mntbuf = *mntbufp;

         for (j = 0, i = 0; i < mntsize; i++) {

                 if (checkvfsname(mntbuf[i].f_fstypename, vfslist))

341 continue;

342 if (!nflag)

                         (void)statfs(mntbuf[i].f_mntonname,&mntbuf[j]);

344 else if (i != j)

345 mntbuf[j] = mntbuf[i];

346 j++;

347 }

348 return (j);

349 }

350

351 /*

352 * Output in "human-readable" format. Uses 3 digits max and puts

353 * unit suffixes at the end. Makes output compact and easy to read,

354 * especially on huge disks.

355 *

356 */

357 unit_t

 unit_adjust(double *val)

359 {

360 double abval;

361 unit_t unit;

362 unsigned int unit_sz;

363

364 abval = fabs(*val);

365

         unit_sz = abval ? ilogb(abval) / 10 : 0;

367

368 if (unit_sz >= UNIT_MAX) {

369 unit = NONE;

370 } else {

371 unit = unitp[unit_sz];

                 *val /= (double)valp[unit_sz];

373 }

374

375 return (unit);

376 }

377

378 void

 prthuman(struct statfs *sfsp, uint64_t used)

380 {

381 int64_t value;

382

383 value = sfsp->f_blocks;

384 value *= sfsp->f_bsize;

385 prthumanval(value);

386 value = used;

387 value *= sfsp->f_bsize;

388 prthumanval(value);

389 value = sfsp->f_bavail;

390 value *= sfsp->f_bsize;

391 prthumanval(value);

392 }

393

394 void

395 prthumanval(int64_t bytes)

396 {

397 char buf[6];

398 int flags;

399

400 flags = HN_B | HN_NOSPACE | HN_DECIMAL;

401 if (hflag == UNITS_SI)

402 flags |= HN_DIVISOR_1000;

403

         humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1),

                         bytes, "", HN_AUTOSCALE, flags);

406

407 if (hflag == UNITS_SI)

                 (void)printf(" %6s", buf);

409 else

                 (void)printf("%6si", buf);

411

412 }

413

414 /*

415 * Convert statfs returned filesystem size into BLOCKSIZE units.

416 * Attempts to avoid overflow for large filesystems.

417 */

 static intmax_t fsbtoblk(int64_t num, uint64_t fsbs, u_long bs, char *fs) 

419 {

         if (num < 0) {

                 warnx("negative filesystem block count/size from fs %s", fs);

422 return 0;

         } else if ((fsbs != 0) && (fsbs < bs)) {

                 return (num / (intmax_t) (bs / fsbs));

425 } else {

                 return (num * (intmax_t) (fsbs / bs));

427 }

428 }

429

430 /*

431 * Print out status about a filesystem.

432 */

433 void

 prtstat(struct statfs *sfsp, struct maxwidths *mwp)

435 {

436 static long blocksize;

437 static int headerlen, timesthrough;

438 static const char *header;

439 uint64_t used, availblks, inodes;

440 char * avail_str;

441

         if (++timesthrough == 1) {

                 mwp->mntfrom = imax(mwp->mntfrom, (int)strlen("Filesystem"));

444 if (hflag) {

445 header = " Size";

                         mwp->total = mwp->used = mwp->avail = (int)strlen(header);

447 } else {

                         header = getbsize(&headerlen, &blocksize);

                         mwp->total = imax(mwp->total, headerlen);

450 }

                 mwp->used = imax(mwp->used, (int)strlen("Used"));

                 if (COMPAT_MODE("bin/df", "unix2003") && !hflag) {

453 avail_str = "Available";

454 } else {

455 avail_str = "Avail";

456 }

                 mwp->avail = imax(mwp->avail, (int)strlen(avail_str));

458

                 (void)printf("%-*s %*s %*s %*s Capacity", mwp->mntfrom,

                     "Filesystem", mwp->total, header, mwp->used, "Used",

461 mwp->avail, avail_str);

462 if (iflag) {

                         mwp->iused = imax(mwp->iused, (int)strlen("  iused"));

                         mwp->ifree = imax(mwp->ifree, (int)strlen("ifree"));

                         (void)printf(" %*s %*s %%iused", mwp->iused - 2,

                             "iused", mwp->ifree, "ifree");

467 }

                 (void)printf("  Mounted on\n");

469 }

470

         (void)printf("%-*s", mwp->mntfrom, sfsp->f_mntfromname);

         if (sfsp->f_blocks > sfsp->f_bfree)

                 used = sfsp->f_blocks - sfsp->f_bfree;

474 else

475 used = 0;

476 availblks = sfsp->f_bavail + used;

477 if (hflag) {

478 prthuman(sfsp, used);

479 } else {

                 (void)printf(" %*jd %*jd %*jd", mwp->total,

                              fsbtoblk(sfsp->f_blocks, sfsp->f_bsize, blocksize, sfsp->f_mntonname),

                              mwp->used, fsbtoblk(used, sfsp->f_bsize, blocksize, sfsp->f_mntonname),

                              mwp->avail, fsbtoblk(sfsp->f_bavail, sfsp->f_bsize, blocksize, sfsp->f_mntonname));

484 }

         if (COMPAT_MODE("bin/df", "unix2003")) {

486 /* Standard says percentage must be rounded UP to next

487 integer value, not truncated */

488 double value;

                 if (availblks == 0)

490 value = 100.0;

491 else {

                         value = (double)used / (double)availblks * 100.0;

                         if ((value-(int)value) > 0.0) value = value + 1.0;

494 }

                 (void)printf(" %5.0f%%", trunc(value));

496 } else {

                 (void)printf(" %5.0f%%",

                     availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);

499 }

500 if (iflag) {

501 inodes = sfsp->f_files;

502 used = inodes - sfsp->f_ffree;

                 (void)printf(" %*llu %*llu %4.0f%% ", mwp->iused, used,

                     mwp->ifree, sfsp->f_ffree, inodes == 0 ? 100.0 :

                     (double)used / (double)inodes * 100.0);

506 } else

                 (void)printf("  ");

         (void)printf("  %s\n", sfsp->f_mntonname);

509 }

510

511 /*

512 * Update the maximum field-width information in `mwp' based on

513 * the filesystem specified by `sfsp'.

514 */

515 void

 update_maxwidths(struct maxwidths *mwp, struct statfs *sfsp)

517 {

518 static long blocksize;

519 int dummy;

520

         if (blocksize == 0)

522 getbsize(&dummy, &blocksize);

523

         mwp->mntfrom = imax(mwp->mntfrom, (int)strlen(sfsp->f_mntfromname));

         mwp->total = imax(mwp->total, int64width(fsbtoblk(sfsp->f_blocks,

                                                          sfsp->f_bsize, blocksize, sfsp->f_mntonname)));

         if (sfsp->f_blocks >= sfsp->f_bfree)

                 mwp->used = imax(mwp->used, int64width(fsbtoblk(sfsp->f_blocks -

                                                                sfsp->f_bfree, sfsp->f_bsize, blocksize, sfsp->f_mntonname)));

         mwp->avail = imax(mwp->avail, int64width(fsbtoblk(sfsp->f_bavail,

                                                          sfsp->f_bsize, blocksize, sfsp->f_mntonname)));

         mwp->iused = imax(mwp->iused, int64width(sfsp->f_files - sfsp->f_ffree));

         mwp->ifree = imax(mwp->ifree, int64width(sfsp->f_ffree));

534 }

535

536 /* Return the width in characters of the specified long. */

537 int

538 int64width(int64_t val)

539 {

540 int len;

541

542 len = 0;

543 /* Negative or zero values require one extra digit. */

         if (val <= 0) {

545 val = -val;

546 len++;

547 }

         while (val > 0) {

549 len++;

550 val /= 10;

551 }

552

553 return (len);

554 }

555

556 void

557 usage(void)

558 {

559

         char *t_flag = COMPAT_MODE("bin/df", "unix2003") ? "[-t]" : "[-t type]";

         (void)fprintf(stderr,

             "usage: df [-b | -H | -h | -k | -m | -g | -P] [-ailn] [-T type] %s [filesystem ...]\n", t_flag);

563 exit(EX_USAGE);

564 }

565

566 char *

567 makenetvfslist(void)

568 {

         char *str, *strptr, **listptr;

570 #ifndef __APPLE__

         int mib[3], maxvfsconf, cnt=0, i;

572 size_t miblen;

573 struct ovfsconf *ptr;

574 #else

         int mib[4], maxvfsconf, cnt=0, i;

576 size_t miblen;

577 struct vfsconf vfc;

578 #endif

579

         mib[0] = CTL_VFS; mib[1] = VFS_GENERIC; mib[2] = VFS_MAXTYPENUM;

581 miblen=sizeof(maxvfsconf);

         if (sysctl(mib, 3,

             &maxvfsconf, &miblen, NULL, 0)) {

584 warn("sysctl failed");

585 return (NULL);

586 }

587

         if ((listptr = malloc(sizeof(char*) * maxvfsconf)) == NULL) {

589 warnx("malloc failed");

590 return (NULL);

591 }

592

593 #ifndef __APPLE__

         for (ptr = getvfsent(); ptr; ptr = getvfsent())

                 if (ptr->vfc_flags & VFCF_NETWORK) {

                         listptr[cnt++] = strdup(ptr->vfc_name);

                         if (listptr[cnt-1] == NULL) {

598 warnx("malloc failed");

599 return (NULL);

600 }

601 }

602 #else

         miblen = sizeof (struct vfsconf);

604 mib[2] = VFS_CONF;

         for (i = 0; i < maxvfsconf; i++) {

606 mib[3] = i;

                 if (sysctl(mib, 4, &vfc, &miblen, NULL, 0) == 0) {

                         if (!(vfc.vfc_flags & MNT_LOCAL)) {

                                 listptr[cnt++] = strdup(vfc.vfc_name);

                                 if (listptr[cnt-1] == NULL) {

611 free(listptr);

612 warnx("malloc failed");

613 return (NULL);

614 }

615 }

616 }

617 }

618 #endif

619

         if (cnt == 0 ||

             (str = malloc(sizeof(char) * (32 * cnt + cnt + 2))) == NULL) {

                 if (cnt > 0)

623 warnx("malloc failed");

624 free(listptr);

625 return (NULL);

626 }

627

         *str = 'n'; *(str + 1) = 'o';

         for (i = 0, strptr = str + 2; i < cnt; i++, strptr++) {

                 strncpy(strptr, listptr[i], 32);

                 strptr += strlen(listptr[i]);

632 *strptr = ',';

633 free(listptr[i]);

634 }

635 *(--strptr) = '\0';

636

637 free(listptr);

638 return (str);

639 }