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 * 3. 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 * @(#) Copyright (c) 1980, 1990, 1993, 1994 The Regents of the University of California. All rights reserved. 35 * @(#)df.c 8.9 (Berkeley) 5/8/95 36 * $FreeBSD: src/bin/df/df.c,v 1.23.2.9 2002/07/01 00:14:24 iedowse Exp $ 37 */ 38 39 #include <sys/param.h> 40 #include <sys/stat.h> 41 #include <sys/mount.h> 42 #include <sys/sysctl.h> 43 #include <sys/statvfs.h> 44 45 #include <vfs/ufs/dinode.h> 46 #include <vfs/ufs/ufsmount.h> 47 48 #include <err.h> 49 #include <errno.h> 50 #include <fcntl.h> 51 #include <fstab.h> 52 #include <libutil.h> 53 #include <stdio.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include <sysexits.h> 57 #include <unistd.h> 58 59 #define UNITS_SI 1 60 #define UNITS_2 2 61 62 #ifndef HN_FRACTIONAL 63 #define HN_FRACTIONAL HN_DECIMAL 64 #endif 65 66 /* Maximum widths of various fields. */ 67 struct maxwidths { 68 int mntfrom; 69 int fstype; 70 int total; 71 int used; 72 int avail; 73 int iused; 74 int ifree; 75 }; 76 77 /* vfslist.c */ 78 char **makevfslist(char *); 79 int checkvfsname(const char *, char **); 80 81 static char *getmntpt(char *); 82 static int quadwidth(int64_t); 83 static char *makenetvfslist(void); 84 static void prthuman(struct statvfs *, int64_t); 85 static void prthumanval(int64_t); 86 static void prtstat(struct statfs *, struct statvfs *, struct maxwidths *); 87 static long regetmntinfo(struct statfs **, struct statvfs **, long, char **); 88 static void update_maxwidths(struct maxwidths *, struct statfs *, struct statvfs *); 89 static void usage(void); 90 91 int aflag = 0, hflag, iflag, nflag, Tflag; 92 struct ufs_args mdev; 93 94 static __inline int 95 imax(int a, int b) 96 { 97 return (a > b ? a : b); 98 } 99 100 static __inline int64_t 101 qmax(int64_t a, int64_t b) 102 { 103 return (a > b ? a : b); 104 } 105 106 int 107 main(int argc, char **argv) 108 { 109 struct stat stbuf; 110 struct statfs statfsbuf, *mntbuf; 111 struct statvfs statvfsbuf, *mntvbuf; 112 struct maxwidths maxwidths; 113 const char *fstype; 114 char *mntpath, *mntpt, **vfslist; 115 long mntsize; 116 int ch, i, rv; 117 118 fstype = "ufs"; 119 120 vfslist = NULL; 121 while ((ch = getopt(argc, argv, "abgHhiklmnPt:T")) != -1) 122 switch (ch) { 123 case 'a': 124 aflag = 1; 125 break; 126 case 'b': 127 /* FALLTHROUGH */ 128 case 'P': 129 if (setenv("BLOCKSIZE", "512", 1) != 0) 130 warn("setenv: cannot set BLOCKSIZE=512"); 131 hflag = 0; 132 break; 133 case 'g': 134 if (setenv("BLOCKSIZE", "1g", 1) != 0) 135 warn("setenv: cannot set BLOCKSIZE=1g"); 136 hflag = 0; 137 break; 138 case 'H': 139 hflag = UNITS_SI; 140 break; 141 case 'h': 142 hflag = UNITS_2; 143 break; 144 case 'i': 145 iflag = 1; 146 break; 147 case 'k': 148 if (setenv("BLOCKSIZE", "1k", 1) != 0) 149 warn("setenv: cannot set BLOCKSIZE=1k"); 150 hflag = 0; 151 break; 152 case 'l': 153 if (vfslist != NULL) 154 errx(1, "-l and -t are mutually exclusive."); 155 vfslist = makevfslist(makenetvfslist()); 156 break; 157 case 'm': 158 if (setenv("BLOCKSIZE", "1m", 1) != 0) 159 warn("setenv: cannot set BLOCKSIZE=1m"); 160 hflag = 0; 161 break; 162 case 'n': 163 nflag = 1; 164 break; 165 case 't': 166 if (vfslist != NULL) 167 errx(1, "only one -t option may be specified"); 168 fstype = optarg; 169 vfslist = makevfslist(optarg); 170 break; 171 case 'T': 172 Tflag = 1; 173 break; 174 case '?': 175 default: 176 usage(); 177 } 178 argc -= optind; 179 argv += optind; 180 181 mntsize = getmntvinfo(&mntbuf, &mntvbuf, MNT_NOWAIT); 182 bzero(&maxwidths, sizeof(maxwidths)); 183 for (i = 0; i < mntsize; i++) 184 update_maxwidths(&maxwidths, &mntbuf[i], &mntvbuf[i]); 185 186 rv = 0; 187 if (!*argv) { 188 mntsize = regetmntinfo(&mntbuf, &mntvbuf, mntsize, vfslist); 189 bzero(&maxwidths, sizeof(maxwidths)); 190 for (i = 0; i < mntsize; i++) 191 update_maxwidths(&maxwidths, &mntbuf[i], &mntvbuf[i]); 192 for (i = 0; i < mntsize; i++) { 193 if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0) 194 prtstat(&mntbuf[i], &mntvbuf[i], &maxwidths); 195 } 196 exit(rv); 197 } 198 199 for (; *argv; argv++) { 200 if (stat(*argv, &stbuf) < 0) { 201 if ((mntpt = getmntpt(*argv)) == NULL) { 202 warn("%s", *argv); 203 rv = 1; 204 continue; 205 } 206 } else if (S_ISCHR(stbuf.st_mode)) { 207 if ((mntpt = getmntpt(*argv)) == NULL) { 208 mdev.fspec = *argv; 209 mntpath = strdup("/tmp/df.XXXXXX"); 210 if (mntpath == NULL) { 211 warn("strdup failed"); 212 rv = 1; 213 continue; 214 } 215 mntpt = mkdtemp(mntpath); 216 if (mntpt == NULL) { 217 warn("mkdtemp(\"%s\") failed", mntpath); 218 rv = 1; 219 free(mntpath); 220 continue; 221 } 222 if (mount(fstype, mntpt, MNT_RDONLY, 223 &mdev) != 0) { 224 warn("%s", *argv); 225 rv = 1; 226 rmdir(mntpt); 227 free(mntpath); 228 continue; 229 } else if (statfs(mntpt, &statfsbuf) == 0 && 230 statvfs(mntpt, &statvfsbuf) == 0) { 231 statfsbuf.f_mntonname[0] = '\0'; 232 prtstat(&statfsbuf, &statvfsbuf, &maxwidths); 233 } else { 234 warn("%s", *argv); 235 rv = 1; 236 } 237 unmount(mntpt, 0); 238 rmdir(mntpt); 239 free(mntpath); 240 continue; 241 } 242 } else 243 mntpt = *argv; 244 /* 245 * Statfs does not take a `wait' flag, so we cannot 246 * implement nflag here. 247 */ 248 if (statfs(mntpt, &statfsbuf) < 0) { 249 warn("%s", mntpt); 250 rv = 1; 251 continue; 252 } 253 if (statvfs(mntpt, &statvfsbuf) < 0) { 254 warn("%s", mntpt); 255 rv = 1; 256 continue; 257 } 258 /* 259 * Check to make sure the arguments we've been given are 260 * satisfied. Return an error if we have been asked to 261 * list a mount point that does not match the other args 262 * we've been given (-l, -t, etc.). 263 */ 264 if (checkvfsname(statfsbuf.f_fstypename, vfslist)) { 265 rv = 1; 266 continue; 267 } 268 269 if (argc == 1) { 270 bzero(&maxwidths, sizeof(maxwidths)); 271 update_maxwidths(&maxwidths, &statfsbuf, &statvfsbuf); 272 } 273 prtstat(&statfsbuf, &statvfsbuf, &maxwidths); 274 } 275 return (rv); 276 } 277 278 static char * 279 getmntpt(char *name) 280 { 281 long mntsize, i; 282 struct statfs *mntbuf; 283 struct statvfs *mntvbuf; 284 285 mntsize = getmntvinfo(&mntbuf, &mntvbuf, 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 filesystem info in ``mntbuf'' filtering out 295 * filesystem 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 long 299 regetmntinfo(struct statfs **mntbufp, struct statvfs **mntvbufp, long mntsize, char **vfslist) 300 { 301 int i, j; 302 struct statfs *mntbuf; 303 struct statvfs *mntvbuf; 304 305 if (vfslist == NULL) 306 return (nflag ? mntsize : getmntvinfo(mntbufp, mntvbufp, MNT_WAIT)); 307 308 mntbuf = *mntbufp; 309 mntvbuf = *mntvbufp; 310 for (j = 0, i = 0; i < mntsize; i++) { 311 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 312 continue; 313 if (!nflag) { 314 statfs(mntbuf[i].f_mntonname,&mntbuf[j]); 315 statvfs(mntbuf[i].f_mntonname,&mntvbuf[j]); 316 } else if (i != j) { 317 mntbuf[j] = mntbuf[i]; 318 mntvbuf[j] = mntvbuf[i]; 319 } 320 j++; 321 } 322 return (j); 323 } 324 325 static void 326 prthuman(struct statvfs *vsfsp, int64_t used) 327 { 328 prthumanval(vsfsp->f_blocks * vsfsp->f_bsize); 329 prthumanval(used * vsfsp->f_bsize); 330 prthumanval(vsfsp->f_bavail * vsfsp->f_bsize); 331 } 332 333 static void 334 prthumanval(int64_t bytes) 335 { 336 char buf[7]; 337 int flags; 338 339 flags = HN_B | HN_NOSPACE | HN_FRACTIONAL; 340 if (hflag == UNITS_SI) 341 flags |= HN_DIVISOR_1000; 342 343 humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1), 344 bytes, "", HN_AUTOSCALE, flags); 345 346 printf(" %6s", buf); 347 } 348 349 /* 350 * Print an inode count in "human-readable" format. 351 */ 352 static void 353 prthumanvalinode(int64_t bytes) 354 { 355 char buf[6]; 356 int flags; 357 358 flags = HN_NOSPACE | HN_FRACTIONAL | HN_DIVISOR_1000; 359 360 humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1), 361 bytes, "", HN_AUTOSCALE, flags); 362 363 printf(" %5s", buf); 364 } 365 366 /* 367 * Convert statfs returned filesystem size into BLOCKSIZE units. 368 * Attempts to avoid overflow for large filesystems. 369 */ 370 static intmax_t 371 fsbtoblk(int64_t num, uint64_t bsize, u_long reqbsize) 372 { 373 if (bsize != 0 && bsize < reqbsize) 374 return (num / (intmax_t)(reqbsize / bsize)); 375 else 376 return (num * (intmax_t)(bsize / reqbsize)); 377 } 378 379 /* 380 * Print out status about a filesystem. 381 */ 382 static void 383 prtstat(struct statfs *sfsp, struct statvfs *vsfsp, struct maxwidths *mwp) 384 { 385 static long blocksize; 386 static int headerlen, timesthrough; 387 static const char *header; 388 int64_t used, availblks, inodes; 389 390 if (++timesthrough == 1) { 391 mwp->mntfrom = imax(mwp->mntfrom, strlen("Filesystem")); 392 mwp->fstype = imax(mwp->fstype, strlen("Type")); 393 if (hflag) { 394 header = " Size"; 395 mwp->total = mwp->used = mwp->avail = strlen(header); 396 } else { 397 header = getbsize(&headerlen, &blocksize); 398 mwp->total = imax(mwp->total, headerlen); 399 } 400 mwp->used = imax(mwp->used, strlen("Used")); 401 mwp->avail = imax(mwp->avail, strlen("Avail")); 402 403 printf("%-*s", mwp->mntfrom, "Filesystem"); 404 if (Tflag) 405 printf(" %-*s", mwp->fstype, "Type"); 406 printf(" %-*s %*s %*s Capacity", mwp->total, header, mwp->used, 407 "Used", mwp->avail, "Avail"); 408 if (iflag) { 409 mwp->iused = imax(hflag ? 0 : mwp->iused, 410 (int)strlen(" iused")); 411 mwp->ifree = imax(hflag ? 0 : mwp->ifree, 412 (int)strlen("ifree")); 413 printf(" %*s %*s %%iused", mwp->iused - 2, 414 "iused", mwp->ifree, "ifree"); 415 } 416 printf(" Mounted on\n"); 417 } 418 printf("%-*s", mwp->mntfrom, sfsp->f_mntfromname); 419 if (Tflag) 420 printf(" %-*s", mwp->fstype, sfsp->f_fstypename); 421 used = vsfsp->f_blocks - vsfsp->f_bfree; 422 availblks = vsfsp->f_bavail + used; 423 if (hflag) { 424 prthuman(vsfsp, used); 425 } else { 426 printf(" %*jd %*jd %*jd", mwp->total, 427 fsbtoblk(vsfsp->f_blocks, vsfsp->f_bsize, blocksize), 428 mwp->used, fsbtoblk(used, vsfsp->f_bsize, blocksize), 429 mwp->avail, fsbtoblk(vsfsp->f_bavail, vsfsp->f_bsize, 430 blocksize)); 431 } 432 printf(" %5.0f%%", 433 availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0); 434 if (iflag) { 435 inodes = vsfsp->f_files; 436 used = inodes - vsfsp->f_ffree; 437 if (hflag) { 438 printf(" "); 439 prthumanvalinode(used); 440 prthumanvalinode(vsfsp->f_ffree); 441 } else { 442 printf(" %*jd %*jd", mwp->iused, (intmax_t)used, 443 mwp->ifree, (intmax_t)vsfsp->f_ffree); 444 } 445 printf(" %4.0f%% ", inodes == 0 ? 100.0 : 446 (double)used / (double)inodes * 100.0); 447 } else 448 printf(" "); 449 printf(" %s\n", sfsp->f_mntonname); 450 } 451 452 /* 453 * Update the maximum field-width information in `mwp' based on 454 * the filesystem specified by `sfsp'. 455 */ 456 static void 457 update_maxwidths(struct maxwidths *mwp, struct statfs *sfsp, struct statvfs *vsfsp) 458 { 459 static long blocksize; 460 int dummy; 461 462 if (blocksize == 0) 463 getbsize(&dummy, &blocksize); 464 465 mwp->mntfrom = imax(mwp->mntfrom, strlen(sfsp->f_mntfromname)); 466 mwp->fstype = imax(mwp->fstype, strlen(sfsp->f_fstypename)); 467 mwp->total = imax(mwp->total, quadwidth(fsbtoblk(vsfsp->f_blocks, 468 vsfsp->f_bsize, blocksize))); 469 mwp->used = imax(mwp->used, quadwidth(fsbtoblk(vsfsp->f_blocks - 470 vsfsp->f_bfree, vsfsp->f_bsize, blocksize))); 471 mwp->avail = imax(mwp->avail, quadwidth(fsbtoblk(vsfsp->f_bavail, 472 vsfsp->f_bsize, blocksize))); 473 mwp->iused = imax(mwp->iused, quadwidth(vsfsp->f_files - 474 vsfsp->f_ffree)); 475 mwp->ifree = imax(mwp->ifree, quadwidth(vsfsp->f_ffree)); 476 } 477 478 /* Return the width in characters of the specified long. */ 479 static int 480 quadwidth(int64_t val) 481 { 482 int len; 483 484 len = 0; 485 /* Negative or zero values require one extra digit. */ 486 if (val <= 0) { 487 val = -val; 488 len++; 489 } 490 while (val > 0) { 491 len++; 492 val /= 10; 493 } 494 return (len); 495 } 496 497 static void 498 usage(void) 499 { 500 501 fprintf(stderr, 502 "usage: df [-b | -H | -h | -k | -m | -P] [-ailnT] [-t type] [file | filesystem ...]\n"); 503 exit(EX_USAGE); 504 } 505 506 static char * 507 makenetvfslist(void) 508 { 509 char *str, *strptr, **listptr; 510 int mib[3], maxvfsconf, cnt=0, i; 511 size_t miblen; 512 struct ovfsconf *ptr; 513 514 mib[0] = CTL_VFS; mib[1] = VFS_GENERIC; mib[2] = VFS_MAXTYPENUM; 515 miblen=sizeof(maxvfsconf); 516 if (sysctl(mib, (unsigned int)(NELEM(mib)), 517 &maxvfsconf, &miblen, NULL, 0)) { 518 warnx("sysctl failed"); 519 return (NULL); 520 } 521 522 if ((listptr = malloc(sizeof(char*) * maxvfsconf)) == NULL) { 523 warnx("malloc failed"); 524 return (NULL); 525 } 526 527 for (ptr = getvfsent(); ptr; ptr = getvfsent()) 528 if (ptr->vfc_flags & VFCF_NETWORK) { 529 listptr[cnt++] = strdup(ptr->vfc_name); 530 if (listptr[cnt-1] == NULL) { 531 warnx("malloc failed"); 532 free(listptr); 533 return (NULL); 534 } 535 } 536 537 if (cnt == 0 || 538 (str = malloc(sizeof(char) * (32 * cnt + cnt + 2))) == NULL) { 539 if (cnt > 0) 540 warnx("malloc failed"); 541 free(listptr); 542 return (NULL); 543 } 544 545 *str = 'n'; *(str + 1) = 'o'; 546 for (i = 0, strptr = str + 2; i < cnt; i++, strptr++) { 547 strncpy(strptr, listptr[i], 32); 548 strptr += strlen(listptr[i]); 549 *strptr = ','; 550 free(listptr[i]); 551 } 552 *(--strptr) = '\0'; 553 554 free(listptr); 555 return (str); 556 } 557