1 /* 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. 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 * 4. 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. 21 * 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 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #if 0 36 #ifndef lint 37 static const char copyright[] = 38 "@(#) Copyright (c) 1980, 1990, 1993, 1994\n\ 39 The Regents of the University of California. All rights reserved.\n"; 40 #endif /* not lint */ 41 42 #ifndef lint 43 static char sccsid[] = "@(#)df.c 8.9 (Berkeley) 5/8/95"; 44 #endif /* not lint */ 45 #endif 46 #include <sys/cdefs.h> 47 __FBSDID("$FreeBSD$"); 48 49 #include <sys/param.h> 50 #include <sys/stat.h> 51 #include <sys/mount.h> 52 #include <sys/sysctl.h> 53 #include <ufs/ufs/ufsmount.h> 54 #include <err.h> 55 #include <libutil.h> 56 #include <stdint.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <string.h> 60 #include <sysexits.h> 61 #include <unistd.h> 62 63 #include "extern.h" 64 65 #define UNITS_SI 1 66 #define UNITS_2 2 67 68 /* Maximum widths of various fields. */ 69 struct maxwidths { 70 int mntfrom; 71 int total; 72 int used; 73 int avail; 74 int iused; 75 int ifree; 76 }; 77 78 static void addstat(struct statfs *, struct statfs *); 79 static char *getmntpt(const char *); 80 static int int64width(int64_t); 81 static char *makenetvfslist(void); 82 static void prthuman(const struct statfs *, int64_t); 83 static void prthumanval(int64_t); 84 static intmax_t fsbtoblk(int64_t, uint64_t, u_long); 85 static void prtstat(struct statfs *, struct maxwidths *); 86 static size_t regetmntinfo(struct statfs **, long, const char **); 87 static void update_maxwidths(struct maxwidths *, const struct statfs *); 88 static void usage(void); 89 90 static __inline int 91 imax(int a, int b) 92 { 93 return (a > b ? a : b); 94 } 95 96 static int aflag = 0, cflag, hflag, iflag, nflag; 97 static struct ufs_args mdev; 98 99 int 100 main(int argc, char *argv[]) 101 { 102 struct stat stbuf; 103 struct statfs statfsbuf, totalbuf; 104 struct maxwidths maxwidths; 105 struct statfs *mntbuf; 106 const char *fstype; 107 char *mntpath, *mntpt; 108 const char **vfslist; 109 size_t i, mntsize; 110 int ch, rv; 111 112 fstype = "ufs"; 113 114 memset(&totalbuf, 0, sizeof(totalbuf)); 115 totalbuf.f_bsize = DEV_BSIZE; 116 strncpy(totalbuf.f_mntfromname, "total", MNAMELEN); 117 vfslist = NULL; 118 while ((ch = getopt(argc, argv, "abcgHhiklmnPt:")) != -1) 119 switch (ch) { 120 case 'a': 121 aflag = 1; 122 break; 123 case 'b': 124 /* FALLTHROUGH */ 125 case 'P': 126 putenv("BLOCKSIZE=512"); 127 hflag = 0; 128 break; 129 case 'c': 130 cflag = 1; 131 break; 132 case 'g': 133 putenv("BLOCKSIZE=1g"); 134 hflag = 0; 135 break; 136 case 'H': 137 hflag = UNITS_SI; 138 break; 139 case 'h': 140 hflag = UNITS_2; 141 break; 142 case 'i': 143 iflag = 1; 144 break; 145 case 'k': 146 putenv("BLOCKSIZE=1k"); 147 hflag = 0; 148 break; 149 case 'l': 150 if (vfslist != NULL) 151 errx(1, "-l and -t are mutually exclusive."); 152 vfslist = makevfslist(makenetvfslist()); 153 break; 154 case 'm': 155 putenv("BLOCKSIZE=1m"); 156 hflag = 0; 157 break; 158 case 'n': 159 nflag = 1; 160 break; 161 case 't': 162 if (vfslist != NULL) 163 errx(1, "only one -t option may be specified"); 164 fstype = optarg; 165 vfslist = makevfslist(optarg); 166 break; 167 case '?': 168 default: 169 usage(); 170 } 171 argc -= optind; 172 argv += optind; 173 174 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 175 bzero(&maxwidths, sizeof(maxwidths)); 176 for (i = 0; i < mntsize; i++) 177 update_maxwidths(&maxwidths, &mntbuf[i]); 178 179 rv = 0; 180 if (!*argv) { 181 mntsize = regetmntinfo(&mntbuf, mntsize, vfslist); 182 bzero(&maxwidths, sizeof(maxwidths)); 183 for (i = 0; i < mntsize; i++) { 184 if (cflag) 185 addstat(&totalbuf, &mntbuf[i]); 186 update_maxwidths(&maxwidths, &mntbuf[i]); 187 } 188 if (cflag) 189 update_maxwidths(&maxwidths, &totalbuf); 190 for (i = 0; i < mntsize; i++) 191 if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0) 192 prtstat(&mntbuf[i], &maxwidths); 193 if (cflag) 194 prtstat(&totalbuf, &maxwidths); 195 exit(rv); 196 } 197 198 for (; *argv; argv++) { 199 if (stat(*argv, &stbuf) < 0) { 200 if ((mntpt = getmntpt(*argv)) == 0) { 201 warn("%s", *argv); 202 rv = 1; 203 continue; 204 } 205 } else if (S_ISCHR(stbuf.st_mode)) { 206 if ((mntpt = getmntpt(*argv)) == 0) { 207 mdev.fspec = *argv; 208 mntpath = strdup("/tmp/df.XXXXXX"); 209 if (mntpath == NULL) { 210 warn("strdup failed"); 211 rv = 1; 212 continue; 213 } 214 mntpt = mkdtemp(mntpath); 215 if (mntpt == NULL) { 216 warn("mkdtemp(\"%s\") failed", mntpath); 217 rv = 1; 218 free(mntpath); 219 continue; 220 } 221 if (mount(fstype, mntpt, MNT_RDONLY, 222 &mdev) != 0) { 223 warn("%s", *argv); 224 rv = 1; 225 (void)rmdir(mntpt); 226 free(mntpath); 227 continue; 228 } else if (statfs(mntpt, &statfsbuf) == 0) { 229 statfsbuf.f_mntonname[0] = '\0'; 230 prtstat(&statfsbuf, &maxwidths); 231 if (cflag) 232 addstat(&totalbuf, &statfsbuf); 233 } else { 234 warn("%s", *argv); 235 rv = 1; 236 } 237 (void)unmount(mntpt, 0); 238 (void)rmdir(mntpt); 239 free(mntpath); 240 continue; 241 } 242 } else 243 mntpt = *argv; 244 245 /* 246 * Statfs does not take a `wait' flag, so we cannot 247 * implement nflag here. 248 */ 249 if (statfs(mntpt, &statfsbuf) < 0) { 250 warn("%s", mntpt); 251 rv = 1; 252 continue; 253 } 254 255 /* 256 * Check to make sure the arguments we've been given are 257 * satisfied. Return an error if we have been asked to 258 * list a mount point that does not match the other args 259 * we've been given (-l, -t, etc.). 260 */ 261 if (checkvfsname(statfsbuf.f_fstypename, vfslist)) { 262 rv = 1; 263 continue; 264 } 265 266 if (argc == 1) { 267 bzero(&maxwidths, sizeof(maxwidths)); 268 update_maxwidths(&maxwidths, &statfsbuf); 269 } 270 prtstat(&statfsbuf, &maxwidths); 271 if (cflag) 272 addstat(&totalbuf, &statfsbuf); 273 } 274 if (cflag) 275 prtstat(&totalbuf, &maxwidths); 276 return (rv); 277 } 278 279 static char * 280 getmntpt(const char *name) 281 { 282 size_t mntsize, i; 283 struct statfs *mntbuf; 284 285 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 286 for (i = 0; i < mntsize; i++) { 287 if (!strcmp(mntbuf[i].f_mntfromname, name)) 288 return (mntbuf[i].f_mntonname); 289 } 290 return (0); 291 } 292 293 /* 294 * Make a pass over the file system info in ``mntbuf'' filtering out 295 * file system types not in vfslist and possibly re-stating to get 296 * current (not cached) info. Returns the new count of valid statfs bufs. 297 */ 298 static size_t 299 regetmntinfo(struct statfs **mntbufp, long mntsize, const char **vfslist) 300 { 301 int error, i, j; 302 struct statfs *mntbuf; 303 304 if (vfslist == NULL) 305 return (nflag ? mntsize : getmntinfo(mntbufp, MNT_WAIT)); 306 307 mntbuf = *mntbufp; 308 for (j = 0, i = 0; i < mntsize; i++) { 309 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 310 continue; 311 /* 312 * XXX statfs(2) can fail for various reasons. It may be 313 * possible that the user does not have access to the 314 * pathname, if this happens, we will fall back on 315 * "stale" filesystem statistics. 316 */ 317 error = statfs(mntbuf[i].f_mntonname, &mntbuf[j]); 318 if (nflag || error < 0) 319 if (i != j) { 320 if (error < 0) 321 warnx("%s stats possibly stale", 322 mntbuf[i].f_mntonname); 323 mntbuf[j] = mntbuf[i]; 324 } 325 j++; 326 } 327 return (j); 328 } 329 330 static void 331 prthuman(const struct statfs *sfsp, int64_t used) 332 { 333 334 prthumanval(sfsp->f_blocks * sfsp->f_bsize); 335 prthumanval(used * sfsp->f_bsize); 336 prthumanval(sfsp->f_bavail * sfsp->f_bsize); 337 } 338 339 static void 340 prthumanval(int64_t bytes) 341 { 342 char buf[6]; 343 int flags; 344 345 flags = HN_B | HN_NOSPACE | HN_DECIMAL; 346 if (hflag == UNITS_SI) 347 flags |= HN_DIVISOR_1000; 348 349 humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1), 350 bytes, "", HN_AUTOSCALE, flags); 351 352 (void)printf(" %6s", buf); 353 } 354 355 /* 356 * Convert statfs returned file system size into BLOCKSIZE units. 357 * Attempts to avoid overflow for large file systems. 358 */ 359 static intmax_t 360 fsbtoblk(int64_t num, uint64_t fsbs, u_long bs) 361 { 362 363 if (fsbs != 0 && fsbs < bs) 364 return (num / (intmax_t)(bs / fsbs)); 365 else 366 return (num * (intmax_t)(fsbs / bs)); 367 } 368 369 /* 370 * Print out status about a file system. 371 */ 372 static void 373 prtstat(struct statfs *sfsp, struct maxwidths *mwp) 374 { 375 static u_long blocksize; 376 static int headerlen, timesthrough = 0; 377 static const char *header; 378 int64_t used, availblks, inodes; 379 380 if (++timesthrough == 1) { 381 mwp->mntfrom = imax(mwp->mntfrom, (int)strlen("Filesystem")); 382 if (hflag) { 383 header = " Size"; 384 mwp->total = mwp->used = mwp->avail = 385 (int)strlen(header); 386 } else { 387 header = getbsize(&headerlen, &blocksize); 388 mwp->total = imax(mwp->total, headerlen); 389 } 390 mwp->used = imax(mwp->used, (int)strlen("Used")); 391 mwp->avail = imax(mwp->avail, (int)strlen("Avail")); 392 393 (void)printf("%-*s %-*s %*s %*s Capacity", 394 mwp->mntfrom, "Filesystem", mwp->total, header, 395 mwp->used, "Used", mwp->avail, "Avail"); 396 if (iflag) { 397 mwp->iused = imax(mwp->iused, (int)strlen(" iused")); 398 mwp->ifree = imax(mwp->ifree, (int)strlen("ifree")); 399 (void)printf(" %*s %*s %%iused", 400 mwp->iused - 2, "iused", mwp->ifree, "ifree"); 401 } 402 (void)printf(" Mounted on\n"); 403 } 404 (void)printf("%-*s", mwp->mntfrom, sfsp->f_mntfromname); 405 used = sfsp->f_blocks - sfsp->f_bfree; 406 availblks = sfsp->f_bavail + used; 407 if (hflag) { 408 prthuman(sfsp, used); 409 } else { 410 (void)printf(" %*jd %*jd %*jd", 411 mwp->total, fsbtoblk(sfsp->f_blocks, 412 sfsp->f_bsize, blocksize), 413 mwp->used, fsbtoblk(used, sfsp->f_bsize, blocksize), 414 mwp->avail, fsbtoblk(sfsp->f_bavail, 415 sfsp->f_bsize, blocksize)); 416 } 417 (void)printf(" %5.0f%%", 418 availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0); 419 if (iflag) { 420 inodes = sfsp->f_files; 421 used = inodes - sfsp->f_ffree; 422 (void)printf(" %*jd %*jd %4.0f%% ", mwp->iused, (intmax_t)used, 423 mwp->ifree, (intmax_t)sfsp->f_ffree, inodes == 0 ? 100.0 : 424 (double)used / (double)inodes * 100.0); 425 } else 426 (void)printf(" "); 427 if (strncmp(sfsp->f_mntfromname, "total", MNAMELEN) != 0) 428 (void)printf(" %s", sfsp->f_mntonname); 429 (void)printf("\n"); 430 } 431 432 void 433 addstat(struct statfs *totalfsp, struct statfs *statfsp) 434 { 435 uint64_t bsize; 436 437 bsize = statfsp->f_bsize / totalfsp->f_bsize; 438 totalfsp->f_blocks += statfsp->f_blocks * bsize; 439 totalfsp->f_bfree += statfsp->f_bfree * bsize; 440 totalfsp->f_bavail += statfsp->f_bavail * bsize; 441 totalfsp->f_files += statfsp->f_files; 442 totalfsp->f_ffree += statfsp->f_ffree; 443 } 444 445 /* 446 * Update the maximum field-width information in `mwp' based on 447 * the file system specified by `sfsp'. 448 */ 449 static void 450 update_maxwidths(struct maxwidths *mwp, const struct statfs *sfsp) 451 { 452 static u_long blocksize = 0; 453 int dummy; 454 455 if (blocksize == 0) 456 getbsize(&dummy, &blocksize); 457 458 mwp->mntfrom = imax(mwp->mntfrom, (int)strlen(sfsp->f_mntfromname)); 459 mwp->total = imax(mwp->total, int64width( 460 fsbtoblk((int64_t)sfsp->f_blocks, sfsp->f_bsize, blocksize))); 461 mwp->used = imax(mwp->used, 462 int64width(fsbtoblk((int64_t)sfsp->f_blocks - 463 (int64_t)sfsp->f_bfree, sfsp->f_bsize, blocksize))); 464 mwp->avail = imax(mwp->avail, int64width(fsbtoblk(sfsp->f_bavail, 465 sfsp->f_bsize, blocksize))); 466 mwp->iused = imax(mwp->iused, int64width((int64_t)sfsp->f_files - 467 sfsp->f_ffree)); 468 mwp->ifree = imax(mwp->ifree, int64width(sfsp->f_ffree)); 469 } 470 471 /* Return the width in characters of the specified value. */ 472 static int 473 int64width(int64_t val) 474 { 475 int len; 476 477 len = 0; 478 /* Negative or zero values require one extra digit. */ 479 if (val <= 0) { 480 val = -val; 481 len++; 482 } 483 while (val > 0) { 484 len++; 485 val /= 10; 486 } 487 488 return (len); 489 } 490 491 static void 492 usage(void) 493 { 494 495 (void)fprintf(stderr, 496 "usage: df [-b | -g | -H | -h | -k | -m | -P] [-aciln] [-t type] [file | filesystem ...]\n"); 497 exit(EX_USAGE); 498 } 499 500 static char * 501 makenetvfslist(void) 502 { 503 char *str, *strptr, **listptr; 504 struct xvfsconf *xvfsp, *keep_xvfsp; 505 size_t buflen; 506 int cnt, i, maxvfsconf; 507 508 if (sysctlbyname("vfs.conflist", NULL, &buflen, NULL, 0) < 0) { 509 warn("sysctl(vfs.conflist)"); 510 return (NULL); 511 } 512 xvfsp = malloc(buflen); 513 if (xvfsp == NULL) { 514 warnx("malloc failed"); 515 return (NULL); 516 } 517 keep_xvfsp = xvfsp; 518 if (sysctlbyname("vfs.conflist", xvfsp, &buflen, NULL, 0) < 0) { 519 warn("sysctl(vfs.conflist)"); 520 free(keep_xvfsp); 521 return (NULL); 522 } 523 maxvfsconf = buflen / sizeof(struct xvfsconf); 524 525 if ((listptr = malloc(sizeof(char*) * maxvfsconf)) == NULL) { 526 warnx("malloc failed"); 527 free(keep_xvfsp); 528 return (NULL); 529 } 530 531 for (cnt = 0, i = 0; i < maxvfsconf; i++) { 532 if (xvfsp->vfc_flags & VFCF_NETWORK) { 533 listptr[cnt++] = strdup(xvfsp->vfc_name); 534 if (listptr[cnt-1] == NULL) { 535 warnx("malloc failed"); 536 free(listptr); 537 free(keep_xvfsp); 538 return (NULL); 539 } 540 } 541 xvfsp++; 542 } 543 544 if (cnt == 0 || 545 (str = malloc(sizeof(char) * (32 * cnt + cnt + 2))) == NULL) { 546 if (cnt > 0) 547 warnx("malloc failed"); 548 free(listptr); 549 free(keep_xvfsp); 550 return (NULL); 551 } 552 553 *str = 'n'; *(str + 1) = 'o'; 554 for (i = 0, strptr = str + 2; i < cnt; i++, strptr++) { 555 strncpy(strptr, listptr[i], 32); 556 strptr += strlen(listptr[i]); 557 *strptr = ','; 558 free(listptr[i]); 559 } 560 *(--strptr) = '\0'; 561 562 free(keep_xvfsp); 563 free(listptr); 564 return (str); 565 } 566