1 /* 2 * Copyright (c) 1989, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Chris Newcomb. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. 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 #ifndef lint 38 static const char copyright[] = 39 "@(#) Copyright (c) 1989, 1993, 1994\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41 #endif /* not lint */ 42 43 #ifndef lint 44 #if 0 45 static const char sccsid[] = "@(#)du.c 8.5 (Berkeley) 5/4/95"; 46 #endif 47 #endif /* not lint */ 48 #include <sys/cdefs.h> 49 __FBSDID("$FreeBSD$"); 50 51 #include <sys/param.h> 52 #include <sys/queue.h> 53 #include <sys/stat.h> 54 55 #include <err.h> 56 #include <errno.h> 57 #include <fnmatch.h> 58 #include <fts.h> 59 #include <math.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <sysexits.h> 64 #include <unistd.h> 65 66 #define KILO_SZ(n) (n) 67 #define MEGA_SZ(n) ((n) * (n)) 68 #define GIGA_SZ(n) ((n) * (n) * (n)) 69 #define TERA_SZ(n) ((n) * (n) * (n) * (n)) 70 #define PETA_SZ(n) ((n) * (n) * (n) * (n) * (n)) 71 72 #define KILO_2_SZ (KILO_SZ(1024ULL)) 73 #define MEGA_2_SZ (MEGA_SZ(1024ULL)) 74 #define GIGA_2_SZ (GIGA_SZ(1024ULL)) 75 #define TERA_2_SZ (TERA_SZ(1024ULL)) 76 #define PETA_2_SZ (PETA_SZ(1024ULL)) 77 78 #define KILO_SI_SZ (KILO_SZ(1000ULL)) 79 #define MEGA_SI_SZ (MEGA_SZ(1000ULL)) 80 #define GIGA_SI_SZ (GIGA_SZ(1000ULL)) 81 #define TERA_SI_SZ (TERA_SZ(1000ULL)) 82 #define PETA_SI_SZ (PETA_SZ(1000ULL)) 83 84 unsigned long long vals_si [] = {1, KILO_SI_SZ, MEGA_SI_SZ, GIGA_SI_SZ, TERA_SI_SZ, PETA_SI_SZ}; 85 unsigned long long vals_base2[] = {1, KILO_2_SZ, MEGA_2_SZ, GIGA_2_SZ, TERA_2_SZ, PETA_2_SZ}; 86 unsigned long long *valp; 87 88 typedef enum { NONE, KILO, MEGA, GIGA, TERA, PETA, UNIT_MAX } unit_t; 89 90 int unitp [] = { NONE, KILO, MEGA, GIGA, TERA, PETA }; 91 92 SLIST_HEAD(ignhead, ignentry) ignores; 93 struct ignentry { 94 char *mask; 95 SLIST_ENTRY(ignentry) next; 96 }; 97 98 int linkchk(FTSENT *); 99 static void usage(void); 100 void prthumanval(double); 101 unit_t unit_adjust(double *); 102 void ignoreadd(const char *); 103 void ignoreclean(void); 104 int ignorep(FTSENT *); 105 106 int 107 main(int argc, char *argv[]) 108 { 109 FTS *fts; 110 FTSENT *p; 111 long blocksize, savednumber = 0; 112 int ftsoptions; 113 int listall; 114 int depth; 115 int Hflag, Lflag, Pflag, aflag, sflag, dflag, cflag, hflag, ch, rval; 116 size_t notused; 117 char **save; 118 static char dot[] = "."; 119 120 Hflag = Lflag = Pflag = aflag = sflag = dflag = cflag = hflag = 0; 121 122 save = argv; 123 ftsoptions = 0; 124 depth = INT_MAX; 125 SLIST_INIT(&ignores); 126 127 while ((ch = getopt(argc, argv, "HI:LPasd:chkrx")) != -1) 128 switch (ch) { 129 case 'H': 130 Hflag = 1; 131 break; 132 case 'I': 133 ignoreadd(optarg); 134 break; 135 case 'L': 136 if (Pflag) 137 usage(); 138 Lflag = 1; 139 break; 140 case 'P': 141 if (Lflag) 142 usage(); 143 Pflag = 1; 144 break; 145 case 'a': 146 aflag = 1; 147 break; 148 case 's': 149 sflag = 1; 150 break; 151 case 'd': 152 dflag = 1; 153 errno = 0; 154 depth = atoi(optarg); 155 if (errno == ERANGE || depth < 0) { 156 warnx("invalid argument to option d: %s", optarg); 157 usage(); 158 } 159 break; 160 case 'c': 161 cflag = 1; 162 break; 163 case 'h': 164 putenv("BLOCKSIZE=512"); 165 hflag = 1; 166 valp = vals_base2; 167 break; 168 case 'k': 169 if (!hflag) 170 putenv("BLOCKSIZE=1024"); 171 break; 172 case 'r': /* Compatibility. */ 173 break; 174 case 'x': 175 ftsoptions |= FTS_XDEV; 176 break; 177 case '?': 178 default: 179 usage(); 180 } 181 182 argc -= optind; 183 argv += optind; 184 185 /* 186 * XXX 187 * Because of the way that fts(3) works, logical walks will not count 188 * the blocks actually used by symbolic links. We rationalize this by 189 * noting that users computing logical sizes are likely to do logical 190 * copies, so not counting the links is correct. The real reason is 191 * that we'd have to re-implement the kernel's symbolic link traversing 192 * algorithm to get this right. If, for example, you have relative 193 * symbolic links referencing other relative symbolic links, it gets 194 * very nasty, very fast. The bottom line is that it's documented in 195 * the man page, so it's a feature. 196 */ 197 198 if (Hflag + Lflag + Pflag > 1) 199 usage(); 200 201 if (Hflag + Lflag + Pflag == 0) 202 Pflag = 1; /* -P (physical) is default */ 203 204 if (Hflag) 205 ftsoptions |= FTS_COMFOLLOW; 206 207 if (Lflag) 208 ftsoptions |= FTS_LOGICAL; 209 210 if (Pflag) 211 ftsoptions |= FTS_PHYSICAL; 212 213 listall = 0; 214 215 if (aflag) { 216 if (sflag || dflag) 217 usage(); 218 listall = 1; 219 } else if (sflag) { 220 if (dflag) 221 usage(); 222 depth = 0; 223 } 224 225 if (!*argv) { 226 argv = save; 227 argv[0] = dot; 228 argv[1] = NULL; 229 } 230 231 (void) getbsize(¬used, &blocksize); 232 blocksize /= 512; 233 234 rval = 0; 235 236 if ((fts = fts_open(argv, ftsoptions, NULL)) == NULL) 237 err(1, "fts_open"); 238 239 while ((p = fts_read(fts)) != NULL) { 240 switch (p->fts_info) { 241 case FTS_D: /* Ignore. */ 242 if (ignorep(p)) 243 fts_set(fts, p, FTS_SKIP); 244 break; 245 case FTS_DP: 246 if (ignorep(p)) 247 break; 248 249 p->fts_parent->fts_number += 250 p->fts_number += p->fts_statp->st_blocks; 251 252 if (p->fts_level <= depth) { 253 if (hflag) { 254 (void) prthumanval(howmany(p->fts_number, blocksize)); 255 (void) printf("\t%s\n", p->fts_path); 256 } else { 257 (void) printf("%ld\t%s\n", 258 howmany(p->fts_number, blocksize), 259 p->fts_path); 260 } 261 } 262 break; 263 case FTS_DC: /* Ignore. */ 264 break; 265 case FTS_DNR: /* Warn, continue. */ 266 case FTS_ERR: 267 case FTS_NS: 268 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 269 rval = 1; 270 break; 271 default: 272 if (ignorep(p)) 273 break; 274 275 if (p->fts_statp->st_nlink > 1 && linkchk(p)) 276 break; 277 278 if (listall || p->fts_level == 0) { 279 if (hflag) { 280 (void) prthumanval(howmany(p->fts_statp->st_blocks, 281 blocksize)); 282 (void) printf("\t%s\n", p->fts_path); 283 } else { 284 (void) printf("%qd\t%s\n", 285 (long long)howmany(p->fts_statp->st_blocks, blocksize), 286 p->fts_path); 287 } 288 } 289 290 p->fts_parent->fts_number += p->fts_statp->st_blocks; 291 } 292 savednumber = p->fts_parent->fts_number; 293 } 294 295 if (errno) 296 err(1, "fts_read"); 297 298 if (cflag) { 299 if (hflag) { 300 (void) prthumanval(howmany(savednumber, blocksize)); 301 (void) printf("\ttotal\n"); 302 } else { 303 (void) printf("%ld\ttotal\n", howmany(savednumber, blocksize)); 304 } 305 } 306 307 ignoreclean(); 308 exit(rval); 309 } 310 311 312 typedef struct _ID { 313 dev_t dev; 314 ino_t inode; 315 } ID; 316 317 318 int 319 linkchk(FTSENT *p) 320 { 321 static ID *files; 322 static int maxfiles, nfiles; 323 ID *fp, *start; 324 ino_t ino; 325 dev_t dev; 326 327 ino = p->fts_statp->st_ino; 328 dev = p->fts_statp->st_dev; 329 if ((start = files) != NULL) 330 for (fp = start + nfiles - 1; fp >= start; --fp) 331 if (ino == fp->inode && dev == fp->dev) 332 return (1); 333 334 if (nfiles == maxfiles && (files = realloc((char *)files, 335 (u_int)(sizeof(ID) * (maxfiles += 128)))) == NULL) 336 errx(1, "can't allocate memory"); 337 files[nfiles].inode = ino; 338 files[nfiles].dev = dev; 339 ++nfiles; 340 return (0); 341 } 342 343 /* 344 * Output in "human-readable" format. Uses 3 digits max and puts 345 * unit suffixes at the end. Makes output compact and easy to read, 346 * especially on huge disks. 347 * 348 */ 349 unit_t 350 unit_adjust(double *val) 351 { 352 double abval; 353 unit_t unit; 354 unsigned int unit_sz; 355 356 abval = fabs(*val); 357 358 unit_sz = abval ? ilogb(abval) / 10 : 0; 359 360 if (unit_sz >= UNIT_MAX) { 361 unit = NONE; 362 } else { 363 unit = unitp[unit_sz]; 364 *val /= (double)valp[unit_sz]; 365 } 366 367 return (unit); 368 } 369 370 void 371 prthumanval(double bytes) 372 { 373 unit_t unit; 374 375 bytes *= 512; 376 unit = unit_adjust(&bytes); 377 378 if (bytes == 0) 379 (void)printf(" 0B"); 380 else if (bytes > 10) 381 (void)printf("%3.0f%c", bytes, "BKMGTPE"[unit]); 382 else 383 (void)printf("%3.1f%c", bytes, "BKMGTPE"[unit]); 384 } 385 386 static void 387 usage(void) 388 { 389 (void)fprintf(stderr, 390 "usage: du [-H | -L | -P] [-a | -s | -d depth] [-c] [-h | -k] [-x] [-I mask] [file ...]\n"); 391 exit(EX_USAGE); 392 } 393 394 void 395 ignoreadd(const char *mask) 396 { 397 struct ignentry *ign; 398 399 ign = calloc(1, sizeof(*ign)); 400 if (ign == NULL) 401 errx(1, "cannot allocate memory"); 402 ign->mask = strdup(mask); 403 if (ign->mask == NULL) 404 errx(1, "cannot allocate memory"); 405 SLIST_INSERT_HEAD(&ignores, ign, next); 406 } 407 408 void 409 ignoreclean(void) 410 { 411 struct ignentry *ign; 412 413 while (!SLIST_EMPTY(&ignores)) { 414 ign = SLIST_FIRST(&ignores); 415 SLIST_REMOVE_HEAD(&ignores, next); 416 free(ign->mask); 417 free(ign); 418 } 419 } 420 421 int 422 ignorep(FTSENT *ent) 423 { 424 struct ignentry *ign; 425 426 SLIST_FOREACH(ign, &ignores, next) 427 if (fnmatch(ign->mask, ent->fts_name, 0) != FNM_NOMATCH) 428 return 1; 429 return 0; 430 } 431