df.c revision 1.73
1 /* $NetBSD: df.c,v 1.73 2007/06/24 01:52:46 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1990, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #include <sys/cdefs.h> 38 #ifndef lint 39 __COPYRIGHT( 40 "@(#) Copyright (c) 1980, 1990, 1993, 1994\n\ 41 The Regents of the University of California. All rights reserved.\n"); 42 #endif /* not lint */ 43 44 #ifndef lint 45 #if 0 46 static char sccsid[] = "@(#)df.c 8.7 (Berkeley) 4/2/94"; 47 #else 48 __RCSID("$NetBSD: df.c,v 1.73 2007/06/24 01:52:46 christos Exp $"); 49 #endif 50 #endif /* not lint */ 51 52 #include <sys/param.h> 53 #include <sys/stat.h> 54 #include <sys/mount.h> 55 56 #include <err.h> 57 #include <errno.h> 58 #include <fcntl.h> 59 #include <util.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <unistd.h> 64 65 extern char *strpct(u_long, u_long, u_int); 66 67 int main(int, char *[]); 68 int bread(off_t, void *, int); 69 char *getmntpt(char *); 70 void prtstat(struct statvfs *, int); 71 int selected(const char *); 72 void maketypelist(char *); 73 long regetmntinfo(struct statvfs **, long); 74 void usage(void); 75 void prthumanval(int64_t, const char *); 76 void prthuman(struct statvfs *, int64_t, int64_t); 77 const char * 78 strpct64(uint64_t, uint64_t, u_int); 79 80 int aflag, gflag, hflag, iflag, lflag, nflag, Pflag; 81 long usize = 0; 82 char **typelist = NULL; 83 84 int 85 main(int argc, char *argv[]) 86 { 87 struct stat stbuf; 88 struct statvfs *mntbuf; 89 long mntsize; 90 int ch, i, maxwidth, width; 91 char *mntpt; 92 93 while ((ch = getopt(argc, argv, "aGghiklmnPt:")) != -1) 94 switch (ch) { 95 case 'a': 96 aflag = 1; 97 break; 98 case 'G': 99 hflag = 0; 100 usize = 1024 * 1024 * 1024; 101 break; 102 case 'g': 103 gflag = 1; 104 break; 105 case 'h': 106 hflag = 1; 107 usize = 0; 108 break; 109 case 'i': 110 iflag = 1; 111 break; 112 case 'k': 113 hflag = 0; 114 usize = 1024; 115 break; 116 case 'l': 117 lflag = 1; 118 break; 119 case 'm': 120 hflag = 0; 121 usize = 1024 * 1024; 122 break; 123 case 'n': 124 nflag = 1; 125 break; 126 case 'P': 127 Pflag = 1; 128 break; 129 case 't': 130 if (typelist != NULL) 131 errx(1, "only one -t option may be specified."); 132 maketypelist(optarg); 133 break; 134 case '?': 135 default: 136 usage(); 137 } 138 139 if (gflag && (Pflag || iflag)) 140 errx(1, "only one of -g and -P or -i may be specified"); 141 if (Pflag && iflag) 142 errx(1, "only one of -P and -i may be specified"); 143 144 argc -= optind; 145 argv += optind; 146 147 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 148 if (mntsize == 0) 149 err(1, "retrieving information on mounted file systems"); 150 151 if (*argv == NULL) { 152 mntsize = regetmntinfo(&mntbuf, mntsize); 153 } else { 154 if ((mntbuf = malloc(argc * sizeof(*mntbuf))) == NULL) 155 err(1, "can't allocate statvfs array"); 156 mntsize = 0; 157 for (; *argv != NULL; argv++) { 158 if (stat(*argv, &stbuf) < 0) { 159 if ((mntpt = getmntpt(*argv)) == 0) { 160 warn("%s", *argv); 161 continue; 162 } 163 } else if (S_ISBLK(stbuf.st_mode)) { 164 if ((mntpt = getmntpt(*argv)) == 0) 165 mntpt = *argv; 166 } else 167 mntpt = *argv; 168 /* 169 * Statfs does not take a `wait' flag, so we cannot 170 * implement nflag here. 171 */ 172 if (!statvfs(mntpt, &mntbuf[mntsize])) 173 if (lflag && 174 (mntbuf[mntsize].f_flag & MNT_LOCAL) == 0) 175 warnx("Warning: %s is not a local %s", 176 *argv, "file system"); 177 else if 178 (!selected(mntbuf[mntsize].f_fstypename)) 179 warnx("Warning: %s mounted as a %s %s", 180 *argv, 181 mntbuf[mntsize].f_fstypename, 182 "file system"); 183 else 184 ++mntsize; 185 else 186 warn("%s", *argv); 187 } 188 } 189 190 maxwidth = 0; 191 for (i = 0; i < mntsize; i++) { 192 width = strlen(mntbuf[i].f_mntfromname); 193 if (width > maxwidth) 194 maxwidth = width; 195 } 196 for (i = 0; i < mntsize; i++) 197 prtstat(&mntbuf[i], maxwidth); 198 exit(0); 199 /* NOTREACHED */ 200 } 201 202 char * 203 getmntpt(char *name) 204 { 205 long mntsize, i; 206 struct statvfs *mntbuf; 207 208 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 209 for (i = 0; i < mntsize; i++) { 210 if (!strcmp(mntbuf[i].f_mntfromname, name)) 211 return (mntbuf[i].f_mntonname); 212 } 213 return (0); 214 } 215 216 static enum { IN_LIST, NOT_IN_LIST } which; 217 218 int 219 selected(const char *type) 220 { 221 char **av; 222 223 /* If no type specified, it's always selected. */ 224 if (typelist == NULL) 225 return (1); 226 for (av = typelist; *av != NULL; ++av) 227 if (!strncmp(type, *av, MFSNAMELEN)) 228 return (which == IN_LIST ? 1 : 0); 229 return (which == IN_LIST ? 0 : 1); 230 } 231 232 void 233 maketypelist(char *fslist) 234 { 235 int i; 236 char *nextcp, **av; 237 238 if ((fslist == NULL) || (fslist[0] == '\0')) 239 errx(1, "empty type list"); 240 241 /* 242 * XXX 243 * Note: the syntax is "noxxx,yyy" for no xxx's and 244 * no yyy's, not the more intuitive "noyyy,noyyy". 245 */ 246 if (fslist[0] == 'n' && fslist[1] == 'o') { 247 fslist += 2; 248 which = NOT_IN_LIST; 249 } else 250 which = IN_LIST; 251 252 /* Count the number of types. */ 253 for (i = 1, nextcp = fslist; 254 (nextcp = strchr(nextcp, ',')) != NULL; i++) 255 ++nextcp; 256 257 /* Build an array of that many types. */ 258 if ((av = typelist = malloc((i + 1) * sizeof(char *))) == NULL) 259 err(1, "can't allocate type array"); 260 av[0] = fslist; 261 for (i = 1, nextcp = fslist; 262 (nextcp = strchr(nextcp, ',')) != NULL; i++) { 263 *nextcp = '\0'; 264 av[i] = ++nextcp; 265 } 266 /* Terminate the array. */ 267 av[i] = NULL; 268 } 269 270 /* 271 * Make a pass over the filesystem info in ``mntbuf'' filtering out 272 * filesystem types not in ``fsmask'' and possibly re-stating to get 273 * current (not cached) info. Returns the new count of valid statvfs bufs. 274 */ 275 long 276 regetmntinfo(struct statvfs **mntbufp, long mntsize) 277 { 278 int i, j; 279 struct statvfs *mntbuf; 280 281 if (!lflag && typelist == NULL && aflag) 282 return (nflag ? mntsize : getmntinfo(mntbufp, MNT_WAIT)); 283 284 mntbuf = *mntbufp; 285 j = 0; 286 for (i = 0; i < mntsize; i++) { 287 if (!aflag && (mntbuf[i].f_flag & MNT_IGNORE) != 0) 288 continue; 289 if (lflag && (mntbuf[i].f_flag & MNT_LOCAL) == 0) 290 continue; 291 if (!selected(mntbuf[i].f_fstypename)) 292 continue; 293 if (nflag) 294 mntbuf[j] = mntbuf[i]; 295 else { 296 struct statvfs layerbuf = mntbuf[i]; 297 (void)statvfs(mntbuf[i].f_mntonname, &mntbuf[j]); 298 /* 299 * If the FS name changed, then new data is for 300 * a different layer and we don't want it. 301 */ 302 if (memcmp(layerbuf.f_mntfromname, 303 mntbuf[j].f_mntfromname, MNAMELEN)) 304 mntbuf[j] = layerbuf; 305 } 306 j++; 307 } 308 return (j); 309 } 310 311 void 312 prthumanval(int64_t bytes, const char *pad) 313 { 314 char buf[6]; 315 316 humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1), 317 bytes, "", HN_AUTOSCALE, 318 HN_B | HN_NOSPACE | HN_DECIMAL); 319 320 (void)printf("%s %6s", pad, buf); 321 } 322 323 void 324 prthuman(struct statvfs *sfsp, int64_t used, int64_t bavail) 325 { 326 327 prthumanval(sfsp->f_blocks * sfsp->f_frsize, ""); 328 prthumanval(used * sfsp->f_frsize, " "); 329 prthumanval(bavail * sfsp->f_frsize, " "); 330 } 331 332 /* 333 * Convert statvfs returned filesystem size into BLOCKSIZE units. 334 * Attempts to avoid overflow for large filesystems. 335 */ 336 #define fsbtoblk(num, fsbs, bs) \ 337 (((fsbs) != 0 && (fsbs) < (bs)) ? \ 338 (int64_t)(num) / (int64_t)((bs) / (fsbs)) : \ 339 (int64_t)(num) * ((fsbs) / (bs))) 340 341 /* 342 * Print out status about a filesystem. 343 */ 344 void 345 prtstat(struct statvfs *sfsp, int maxwidth) 346 { 347 static long blocksize; 348 static int headerlen, timesthrough; 349 static const char *header; 350 static const char full[] = "100%"; 351 static const char empty[] = " 0%"; 352 int64_t used, availblks, inodes; 353 int64_t bavail; 354 355 if (gflag) { 356 /* 357 * From SunOS-5.6: 358 * 359 * /var (/dev/dsk/c0t0d0s3 ): 8192 block size 1024 frag size 360 * 984242 total blocks 860692 free blocks 859708 available 249984 total files 361 * 248691 free files 8388611 filesys id 362 * ufs fstype 0x00000004 flag 255 filename length 363 * 364 */ 365 (void)printf("%10s (%-12s): %7ld block size %12ld frag size\n", 366 sfsp->f_mntonname, sfsp->f_mntfromname, 367 sfsp->f_iosize, /* On UFS/FFS systems this is 368 * also called the "optimal 369 * transfer block size" but it 370 * is of course the file 371 * system's block size too. 372 */ 373 sfsp->f_bsize); /* not so surprisingly the 374 * "fundamental file system 375 * block size" is the frag 376 * size. 377 */ 378 (void)printf("%10" PRId64 " total blocks %10" PRId64 379 " free blocks %10" PRId64 " available\n", 380 (uint64_t)sfsp->f_blocks, (uint64_t)sfsp->f_bfree, 381 (uint64_t)sfsp->f_bavail); 382 (void)printf("%10" PRId64 " total files %10" PRId64 383 " free files %12lx filesys id\n", 384 (uint64_t)sfsp->f_ffree, (uint64_t)sfsp->f_files, 385 sfsp->f_fsid); 386 (void)printf("%10s fstype %#15lx flag %17ld filename " 387 "length\n", sfsp->f_fstypename, sfsp->f_flag, 388 sfsp->f_namemax); 389 (void)printf("%10lu owner %17" PRId64 " syncwrites %12" PRId64 390 " asyncwrites\n\n", (unsigned long)sfsp->f_owner, 391 sfsp->f_syncwrites, sfsp->f_asyncwrites); 392 393 /* 394 * a concession by the structured programming police to the 395 * indentation police.... 396 */ 397 return; 398 } 399 if (maxwidth < 12) 400 maxwidth = 12; 401 if (++timesthrough == 1) { 402 switch (blocksize = usize) { 403 case 1024: 404 header = Pflag ? "1024-blocks" : "1K-blocks"; 405 headerlen = strlen(header); 406 break; 407 case 1024 * 1024: 408 header = Pflag ? "1048576-blocks" : "1M-blocks"; 409 headerlen = strlen(header); 410 break; 411 case 1024 * 1024 * 1024: 412 header = Pflag ? "1073741824-blocks" : "1G-blocks"; 413 headerlen = strlen(header); 414 break; 415 default: 416 if (hflag) { 417 header = " Size"; 418 headerlen = strlen(header); 419 } else 420 header = getbsize(&headerlen, &blocksize); 421 break; 422 } 423 if (Pflag) { 424 /* 425 * "Filesystem {1024,512}-blocks Used Available 426 * Capacity Mounted on\n" 427 */ 428 (void)printf("Filesystem %s Used Available Capacity " 429 "Mounted on\n", header); 430 } else { 431 (void)printf("%-*.*s %s Used Avail %%Cap", 432 maxwidth - (headerlen - 9), 433 maxwidth - (headerlen - 9), 434 "Filesystem", header); 435 if (iflag) 436 (void)printf(" iUsed iAvail %%iCap"); 437 (void)printf(" Mounted on\n"); 438 } 439 } 440 used = sfsp->f_blocks - sfsp->f_bfree; 441 bavail = sfsp->f_bfree - sfsp->f_bresvd; 442 availblks = bavail + used; 443 if (Pflag) { 444 /* 445 * "%s %d %d %d %s %s\n", <file system name>, <total space>, 446 * <space used>, <space free>, <percentage used>, 447 * <file system root> 448 */ 449 (void)printf("%s %" PRId64 " %" PRId64 " %" PRId64 " %s %s\n", 450 sfsp->f_mntfromname, 451 fsbtoblk(sfsp->f_blocks, sfsp->f_bsize, blocksize), 452 fsbtoblk(used, sfsp->f_bsize, blocksize), 453 fsbtoblk(sfsp->f_bavail, sfsp->f_bsize, blocksize), 454 availblks == 0 ? full : strpct64((uint64_t) used, 455 (uint64_t) availblks, 0), sfsp->f_mntonname); 456 /* 457 * another concession by the structured programming police to 458 * the indentation police.... 459 * 460 * Note iflag cannot be set when Pflag is set. 461 */ 462 return; 463 } 464 465 (void)printf("%-*.*s", maxwidth, maxwidth, sfsp->f_mntfromname); 466 467 if (hflag) 468 prthuman(sfsp, used, bavail); 469 else 470 (void)printf("%10" PRId64 " %10" PRId64 " %10" PRId64, 471 fsbtoblk(sfsp->f_blocks, sfsp->f_frsize, blocksize), 472 fsbtoblk(used, sfsp->f_frsize, blocksize), 473 fsbtoblk(bavail, sfsp->f_frsize, blocksize)); 474 (void)printf(" %4s", 475 availblks == 0 ? full : 476 /* We know that these values are never negative */ 477 strpct64((uint64_t)used, (uint64_t)availblks, 0)); 478 if (iflag) { 479 inodes = sfsp->f_files; 480 used = inodes - sfsp->f_ffree; 481 (void)printf(" %8ld %8ld %4s", 482 (u_long)used, (u_long)sfsp->f_ffree, 483 inodes == 0 ? (used == 0 ? empty : full) : 484 strpct64((uint64_t)used, (uint64_t)inodes, 0)); 485 } 486 (void)printf(" %s\n", sfsp->f_mntonname); 487 } 488 489 void 490 usage(void) 491 { 492 493 (void)fprintf(stderr, 494 "Usage: %s [-aGghklmn] [-i|-p] [-t type] [file | " 495 "file_system ...]\n", 496 getprogname()); 497 exit(1); 498 /* NOTREACHED */ 499 } 500 501 const char * 502 strpct64(uint64_t numerator, uint64_t denominator, u_int digits) 503 { 504 505 while (denominator > ULONG_MAX) { 506 numerator >>= 1; 507 denominator >>= 1; 508 } 509 return (strpct((u_long)numerator, (u_long)denominator, digits)); 510 } 511
Indexes created Wed Oct 01 18:09:54 GMT 2025