du.c revision 1.16
1 /* $NetBSD: du.c,v 1.16 2000/12/30 16:00:33 hubertf Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Chris Newcomb. 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 #ifndef lint 41 __COPYRIGHT("@(#) Copyright (c) 1989, 1993, 1994\n\ 42 The Regents of the University of California. All rights reserved.\n"); 43 #endif /* not lint */ 44 45 #ifndef lint 46 #if 0 47 static char sccsid[] = "@(#)du.c 8.5 (Berkeley) 5/4/95"; 48 #else 49 __RCSID("$NetBSD: du.c,v 1.16 2000/12/30 16:00:33 hubertf Exp $"); 50 #endif 51 #endif /* not lint */ 52 53 #include <sys/types.h> 54 #include <sys/stat.h> 55 56 #include <dirent.h> 57 #include <err.h> 58 #include <errno.h> 59 #include <fts.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <unistd.h> 64 65 int linkchk __P((FTSENT *)); 66 int main __P((int, char **)); 67 void usage __P((void)); 68 69 int 70 main(argc, argv) 71 int argc; 72 char *argv[]; 73 { 74 FTS *fts; 75 FTSENT *p; 76 long blocksize, totalblocks; 77 int ftsoptions, listdirs, listfiles; 78 int Hflag, Lflag, Pflag, aflag, ch, cflag, kmflag, notused, rval, sflag; 79 char **save; 80 81 save = argv; 82 Hflag = Lflag = Pflag = aflag = cflag = kmflag = sflag = 0; 83 totalblocks = 0; 84 ftsoptions = FTS_PHYSICAL; 85 while ((ch = getopt(argc, argv, "HLPackmrsx")) != -1) 86 switch (ch) { 87 case 'H': 88 Hflag = 1; 89 Lflag = Pflag = 0; 90 break; 91 case 'L': 92 Lflag = 1; 93 Hflag = Pflag = 0; 94 break; 95 case 'P': 96 Pflag = 1; 97 Hflag = Lflag = 0; 98 break; 99 case 'a': 100 aflag = 1; 101 break; 102 case 'c': 103 cflag = 1; 104 break; 105 case 'k': 106 blocksize = 1024; 107 kmflag = 1; 108 break; 109 case 'm': 110 blocksize = 1024 * 1024; 111 kmflag = 1; 112 break; 113 case 'r': 114 break; 115 case 's': 116 sflag = 1; 117 break; 118 case 'x': 119 ftsoptions |= FTS_XDEV; 120 break; 121 case '?': 122 default: 123 usage(); 124 } 125 argc -= optind; 126 argv += optind; 127 128 /* 129 * XXX 130 * Because of the way that fts(3) works, logical walks will not count 131 * the blocks actually used by symbolic links. We rationalize this by 132 * noting that users computing logical sizes are likely to do logical 133 * copies, so not counting the links is correct. The real reason is 134 * that we'd have to re-implement the kernel's symbolic link traversing 135 * algorithm to get this right. If, for example, you have relative 136 * symbolic links referencing other relative symbolic links, it gets 137 * very nasty, very fast. The bottom line is that it's documented in 138 * the man page, so it's a feature. 139 */ 140 if (Hflag) 141 ftsoptions |= FTS_COMFOLLOW; 142 if (Lflag) { 143 ftsoptions &= ~FTS_PHYSICAL; 144 ftsoptions |= FTS_LOGICAL; 145 } 146 147 if (aflag) { 148 if (sflag) 149 usage(); 150 listdirs = listfiles = 1; 151 } else if (sflag) 152 listdirs = listfiles = 0; 153 else { 154 listfiles = 0; 155 listdirs = 1; 156 } 157 158 if (!*argv) { 159 argv = save; 160 argv[0] = "."; 161 argv[1] = NULL; 162 } 163 164 if (!kmflag) 165 (void)getbsize(¬used, &blocksize); 166 blocksize /= 512; 167 168 if ((fts = fts_open(argv, ftsoptions, NULL)) == NULL) 169 err(1, "fts_open `%s'", *argv); 170 171 for (rval = 0; (p = fts_read(fts)) != NULL;) 172 switch (p->fts_info) { 173 case FTS_D: /* Ignore. */ 174 break; 175 case FTS_DP: 176 p->fts_parent->fts_number += 177 p->fts_number += p->fts_statp->st_blocks; 178 if (cflag) 179 totalblocks += p->fts_statp->st_blocks; 180 /* 181 * If listing each directory, or not listing files 182 * or directories and this is post-order of the 183 * root of a traversal, display the total. 184 */ 185 if (listdirs || (!listfiles && !p->fts_level)) 186 (void)printf("%ld\t%s\n", 187 howmany(p->fts_number, blocksize), 188 p->fts_path); 189 break; 190 case FTS_DC: /* Ignore. */ 191 break; 192 case FTS_DNR: /* Warn, continue. */ 193 case FTS_ERR: 194 case FTS_NS: 195 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 196 rval = 1; 197 break; 198 default: 199 if (p->fts_statp->st_nlink > 1 && linkchk(p)) 200 break; 201 /* 202 * If listing each file, or a non-directory file was 203 * the root of a traversal, display the total. 204 */ 205 if (listfiles || !p->fts_level) 206 (void)printf("%qd\t%s\n", (long long) 207 howmany(p->fts_statp->st_blocks, blocksize), 208 p->fts_path); 209 p->fts_parent->fts_number += p->fts_statp->st_blocks; 210 if (cflag) 211 totalblocks += p->fts_statp->st_blocks; 212 } 213 if (errno) 214 err(1, "fts_read"); 215 if (cflag) 216 (void)printf("%ld\ttotal\n", 217 howmany(totalblocks, blocksize)); 218 exit(0); 219 } 220 221 typedef struct _ID { 222 dev_t dev; 223 ino_t inode; 224 } ID; 225 226 int 227 linkchk(p) 228 FTSENT *p; 229 { 230 static ID *files; 231 static int maxfiles, nfiles; 232 ID *fp, *start; 233 ino_t ino; 234 dev_t dev; 235 236 ino = p->fts_statp->st_ino; 237 dev = p->fts_statp->st_dev; 238 if ((start = files) != NULL) 239 for (fp = start + nfiles - 1; fp >= start; --fp) 240 if (ino == fp->inode && dev == fp->dev) 241 return (1); 242 243 if (nfiles == maxfiles && (files = realloc((char *)files, 244 (u_int)(sizeof(ID) * (maxfiles += 128)))) == NULL) 245 err(1, "realloc"); 246 files[nfiles].inode = ino; 247 files[nfiles].dev = dev; 248 ++nfiles; 249 return (0); 250 } 251 252 void 253 usage() 254 { 255 256 (void)fprintf(stderr, 257 "usage: du [-H | -L | -P] [-a | -s] [-ckmrx] [file ...]\n"); 258 exit(1); 259 } 260
Indexes created Tue Sep 30 17:09:57 GMT 2025