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, kflag, 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 strlcpy(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 /* 127 * POSIX specifically discusses the the behavior of 128 * both -k and -P. It states that the blocksize should 129 * be set to 1024. Thus, if this occurs, simply break 130 * rather than clobbering the old blocksize. 131 */ 132 if (kflag) 133 break; 134 putenv("BLOCKSIZE=512"); 135 hflag = 0; 136 break; 137 case 'c': 138 cflag = 1; 139 break; 140 case 'g': 141 putenv("BLOCKSIZE=1g"); 142 hflag = 0; 143 break; 144 case 'H': 145 hflag = UNITS_SI; 146 break; 147 case 'h': 148 hflag = UNITS_2; 149 break; 150 case 'i': 151 iflag = 1; 152 break; 153 case 'k': 154 kflag++; 155 putenv("BLOCKSIZE=1024"); 156 hflag = 0; 157 break; 158 case 'l': 159 if (vfslist != NULL) 160 errx(1, "-l and -t are mutually exclusive."); 161 vfslist = makevfslist(makenetvfslist()); 162 break; 163 case 'm': 164 putenv("BLOCKSIZE=1m"); 165 hflag = 0; 166 break; 167 case 'n': 168 nflag = 1; 169 break; 170 case 't': 171 if (vfslist != NULL) 172 errx(1, "only one -t option may be specified"); 173 fstype = optarg; 174 vfslist = makevfslist(optarg); 175 break; 176 case '?': 177 default: 178 usage(); 179 } 180 argc -= optind; 181 argv += optind; 182 183 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 184 bzero(&maxwidths, sizeof(maxwidths)); 185 for (i = 0; i < mntsize; i++) 186 update_maxwidths(&maxwidths, &mntbuf[i]); 187 188 rv = 0; 189 if (!*argv) { 190 mntsize = regetmntinfo(&mntbuf, mntsize, vfslist); 191 bzero(&maxwidths, sizeof(maxwidths)); 192 for (i = 0; i < mntsize; i++) { 193 if (cflag) 194 addstat(&totalbuf, &mntbuf[i]); 195 update_maxwidths(&maxwidths, &mntbuf[i]); 196 } 197 if (cflag) 198 update_maxwidths(&maxwidths, &totalbuf); 199 for (i = 0; i < mntsize; i++) 200 if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0) 201 prtstat(&mntbuf[i], &maxwidths); 202 if (cflag) 203 prtstat(&totalbuf, &maxwidths); 204 exit(rv); 205 } 206 207 for (; *argv; argv++) { 208 if (stat(*argv, &stbuf) < 0) { 209 if ((mntpt = getmntpt(*argv)) == 0) { 210 warn("%s", *argv); 211 rv = 1; 212 continue; 213 } 214 } else if (S_ISCHR(stbuf.st_mode)) { 215 if ((mntpt = getmntpt(*argv)) == 0) { 216 mdev.fspec = *argv; 217 mntpath = strdup("/tmp/df.XXXXXX"); 218 if (mntpath == NULL) { 219 warn("strdup failed"); 220 rv = 1; 221 continue; 222 } 223 mntpt = mkdtemp(mntpath); 224 if (mntpt == NULL) { 225 warn("mkdtemp(\"%s\") failed", mntpath); 226 rv = 1; 227 free(mntpath); 228 continue; 229 } 230 if (mount(fstype, mntpt, MNT_RDONLY, 231 &mdev) != 0) { 232 warn("%s", *argv); 233 rv = 1; 234 (void)rmdir(mntpt); 235 free(mntpath); 236 continue; 237 } else if (statfs(mntpt, &statfsbuf) == 0) { 238 statfsbuf.f_mntonname[0] = '\0'; 239 prtstat(&statfsbuf, &maxwidths); 240 if (cflag) 241 addstat(&totalbuf, &statfsbuf); 242 } else { 243 warn("%s", *argv); 244 rv = 1; 245 } 246 (void)unmount(mntpt, 0); 247 (void)rmdir(mntpt); 248 free(mntpath); 249 continue; 250 } 251 } else 252 mntpt = *argv; 253 254 /* 255 * Statfs does not take a `wait' flag, so we cannot 256 * implement nflag here. 257 */ 258 if (statfs(mntpt, &statfsbuf) < 0) { 259 warn("%s", mntpt); 260 rv = 1; 261 continue; 262 } 263 264 /* 265 * Check to make sure the arguments we've been given are 266 * satisfied. Return an error if we have been asked to 267 * list a mount point that does not match the other args 268 * we've been given (-l, -t, etc.). 269 */ 270 if (checkvfsname(statfsbuf.f_fstypename, vfslist)) { 271 rv = 1; 272 continue; 273 } 274 275 if (argc == 1) { 276 bzero(&maxwidths, sizeof(maxwidths)); 277 update_maxwidths(&maxwidths, &statfsbuf); 278 } 279 prtstat(&statfsbuf, &maxwidths); 280 if (cflag) 281 addstat(&totalbuf, &statfsbuf); 282 } 283 if (cflag) 284 prtstat(&totalbuf, &maxwidths); 285 return (rv); 286 } 287 288 static char * 289 getmntpt(const char *name) 290 { 291 size_t mntsize, i; 292 struct statfs *mntbuf; 293 294 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 295 for (i = 0; i < mntsize; i++) { 296 if (!strcmp(mntbuf[i].f_mntfromname, name)) 297 return (mntbuf[i].f_mntonname); 298 } 299 return (0); 300 } 301 302 /* 303 * Make a pass over the file system info in ``mntbuf'' filtering out 304 * file system types not in vfslist and possibly re-stating to get 305 * current (not cached) info. Returns the new count of valid statfs bufs. 306 */ 307 static size_t 308 regetmntinfo(struct statfs **mntbufp, long mntsize, const char **vfslist) 309 { 310 int error, i, j; 311 struct statfs *mntbuf; 312 313 if (vfslist == NULL) 314 return (nflag ? mntsize : getmntinfo(mntbufp, MNT_WAIT)); 315 316 mntbuf = *mntbufp; 317 for (j = 0, i = 0; i < mntsize; i++) { 318 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 319 continue; 320 /* 321 * XXX statfs(2) can fail for various reasons. It may be 322 * possible that the user does not have access to the 323 * pathname, if this happens, we will fall back on 324 * "stale" filesystem statistics. 325 */ 326 error = statfs(mntbuf[i].f_mntonname, &mntbuf[j]); 327 if (nflag || error < 0) 328 if (i != j) { 329 if (error < 0) 330 warnx("%s stats possibly stale", 331 mntbuf[i].f_mntonname); 332 mntbuf[j] = mntbuf[i]; 333 } 334 j++; 335 } 336 return (j); 337 } 338 339 static void 340 prthuman(const struct statfs *sfsp, int64_t used) 341 { 342 343 prthumanval(sfsp->f_blocks * sfsp->f_bsize); 344 prthumanval(used * sfsp->f_bsize); 345 prthumanval(sfsp->f_bavail * sfsp->f_bsize); 346 } 347 348 static void 349 prthumanval(int64_t bytes) 350 { 351 char buf[6]; 352 int flags; 353 354 flags = HN_B | HN_NOSPACE | HN_DECIMAL; 355 if (hflag == UNITS_SI) 356 flags |= HN_DIVISOR_1000; 357 358 humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1), 359 bytes, "", HN_AUTOSCALE, flags); 360 361 (void)printf(" %6s", buf); 362 } 363 364 /* 365 * Convert statfs returned file system size into BLOCKSIZE units. 366 * Attempts to avoid overflow for large file systems. 367 */ 368 static intmax_t 369 fsbtoblk(int64_t num, uint64_t fsbs, u_long bs) 370 { 371 372 if (fsbs != 0 && fsbs < bs) 373 return (num / (intmax_t)(bs / fsbs)); 374 else 375 return (num * (intmax_t)(fsbs / bs)); 376 } 377 378 /* 379 * Print out status about a file system. 380 */ 381 static void 382 prtstat(struct statfs *sfsp, struct maxwidths *mwp) 383 { 384 static u_long blocksize; 385 static int headerlen, timesthrough = 0; 386 static const char *header; 387 int64_t used, availblks, inodes; 388 389 if (++timesthrough == 1) { 390 mwp->mntfrom = imax(mwp->mntfrom, (int)strlen("Filesystem")); 391 if (hflag) { 392 header = " Size"; 393 mwp->total = mwp->used = mwp->avail = 394 (int)strlen(header); 395 } else { 396 header = getbsize(&headerlen, &blocksize); 397 mwp->total = imax(mwp->total, headerlen); 398 } 399 mwp->used = imax(mwp->used, (int)strlen("Used")); 400 mwp->avail = imax(mwp->avail, (int)strlen("Avail")); 401 402 (void)printf("%-*s %-*s %*s %*s Capacity", 403 mwp->mntfrom, "Filesystem", mwp->total, header, 404 mwp->used, "Used", mwp->avail, "Avail"); 405 if (iflag) { 406 mwp->iused = imax(mwp->iused, (int)strlen(" iused")); 407 mwp->ifree = imax(mwp->ifree, (int)strlen("ifree")); 408 (void)printf(" %*s %*s %%iused", 409 mwp->iused - 2, "iused", mwp->ifree, "ifree"); 410 } 411 (void)printf(" Mounted on\n"); 412 } 413 (void)printf("%-*s", mwp->mntfrom, sfsp->f_mntfromname); 414 used = sfsp->f_blocks - sfsp->f_bfree; 415 availblks = sfsp->f_bavail + used; 416 if (hflag) { 417 prthuman(sfsp, used); 418 } else { 419 (void)printf(" %*jd %*jd %*jd", 420 mwp->total, fsbtoblk(sfsp->f_blocks, 421 sfsp->f_bsize, blocksize), 422 mwp->used, fsbtoblk(used, sfsp->f_bsize, blocksize), 423 mwp->avail, fsbtoblk(sfsp->f_bavail, 424 sfsp->f_bsize, blocksize)); 425 } 426 (void)printf(" %5.0f%%", 427 availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0); 428 if (iflag) { 429 inodes = sfsp->f_files; 430 used = inodes - sfsp->f_ffree; 431 (void)printf(" %*jd %*jd %4.0f%% ", mwp->iused, (intmax_t)used, 432 mwp->ifree, (intmax_t)sfsp->f_ffree, inodes == 0 ? 100.0 : 433 (double)used / (double)inodes * 100.0); 434 } else 435 (void)printf(" "); 436 if (strncmp(sfsp->f_mntfromname, "total", MNAMELEN) != 0) 437 (void)printf(" %s", sfsp->f_mntonname); 438 (void)printf("\n"); 439 } 440 441 void 442 addstat(struct statfs *totalfsp, struct statfs *statfsp) 443 { 444 uint64_t bsize; 445 446 bsize = statfsp->f_bsize / totalfsp->f_bsize; 447 totalfsp->f_blocks += statfsp->f_blocks * bsize; 448 totalfsp->f_bfree += statfsp->f_bfree * bsize; 449 totalfsp->f_bavail += statfsp->f_bavail * bsize; 450 totalfsp->f_files += statfsp->f_files; 451 totalfsp->f_ffree += statfsp->f_ffree; 452 } 453 454 /* 455 * Update the maximum field-width information in `mwp' based on 456 * the file system specified by `sfsp'. 457 */ 458 static void 459 update_maxwidths(struct maxwidths *mwp, const struct statfs *sfsp) 460 { 461 static u_long blocksize = 0; 462 int dummy; 463 464 if (blocksize == 0) 465 getbsize(&dummy, &blocksize); 466 467 mwp->mntfrom = imax(mwp->mntfrom, (int)strlen(sfsp->f_mntfromname)); 468 mwp->total = imax(mwp->total, int64width( 469 fsbtoblk((int64_t)sfsp->f_blocks, sfsp->f_bsize, blocksize))); 470 mwp->used = imax(mwp->used, 471 int64width(fsbtoblk((int64_t)sfsp->f_blocks - 472 (int64_t)sfsp->f_bfree, sfsp->f_bsize, blocksize))); 473 mwp->avail = imax(mwp->avail, int64width(fsbtoblk(sfsp->f_bavail, 474 sfsp->f_bsize, blocksize))); 475 mwp->iused = imax(mwp->iused, int64width((int64_t)sfsp->f_files - 476 sfsp->f_ffree)); 477 mwp->ifree = imax(mwp->ifree, int64width(sfsp->f_ffree)); 478 } 479 480 /* Return the width in characters of the specified value. */ 481 static int 482 int64width(int64_t val) 483 { 484 int len; 485 486 len = 0; 487 /* Negative or zero values require one extra digit. */ 488 if (val <= 0) { 489 val = -val; 490 len++; 491 } 492 while (val > 0) { 493 len++; 494 val /= 10; 495 } 496 497 return (len); 498 } 499 500 static void 501 usage(void) 502 { 503 504 (void)fprintf(stderr, 505 "usage: df [-b | -g | -H | -h | -k | -m | -P] [-aciln] [-t type] [file | filesystem ...]\n"); 506 exit(EX_USAGE); 507 } 508 509 static char * 510 makenetvfslist(void) 511 { 512 char *str, *strptr, **listptr; 513 struct xvfsconf *xvfsp, *keep_xvfsp; 514 size_t buflen; 515 int cnt, i, maxvfsconf; 516 517 if (sysctlbyname("vfs.conflist", NULL, &buflen, NULL, 0) < 0) { 518 warn("sysctl(vfs.conflist)"); 519 return (NULL); 520 } 521 xvfsp = malloc(buflen); 522 if (xvfsp == NULL) { 523 warnx("malloc failed"); 524 return (NULL); 525 } 526 keep_xvfsp = xvfsp; 527 if (sysctlbyname("vfs.conflist", xvfsp, &buflen, NULL, 0) < 0) { 528 warn("sysctl(vfs.conflist)"); 529 free(keep_xvfsp); 530 return (NULL); 531 } 532 maxvfsconf = buflen / sizeof(struct xvfsconf); 533 534 if ((listptr = malloc(sizeof(char*) * maxvfsconf)) == NULL) { 535 warnx("malloc failed"); 536 free(keep_xvfsp); 537 return (NULL); 538 } 539 540 for (cnt = 0, i = 0; i < maxvfsconf; i++) { 541 if (xvfsp->vfc_flags & VFCF_NETWORK) { 542 listptr[cnt++] = strdup(xvfsp->vfc_name); 543 if (listptr[cnt-1] == NULL) { 544 warnx("malloc failed"); 545 free(listptr); 546 free(keep_xvfsp); 547 return (NULL); 548 } 549 } 550 xvfsp++; 551 } 552 553 if (cnt == 0 || 554 (str = malloc(sizeof(char) * (32 * cnt + cnt + 2))) == NULL) { 555 if (cnt > 0) 556 warnx("malloc failed"); 557 free(listptr); 558 free(keep_xvfsp); 559 return (NULL); 560 } 561 562 *str = 'n'; *(str + 1) = 'o'; 563 for (i = 0, strptr = str + 2; i < cnt; i++, strptr++) { 564 strlcpy(strptr, listptr[i], 32); 565 strptr += strlen(listptr[i]); 566 *strptr = ','; 567 free(listptr[i]); 568 } 569 *(--strptr) = '\0'; 570 571 free(keep_xvfsp); 572 free(listptr); 573 return (str); 574 } 575