| 1 | /* |
| 2 | * Copyright (c) 1989 The Regents of the University of California. |
| 3 | * 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 | char copyright[] = |
| 39 | "@(#) Copyright (c) 1989 The Regents of the University of California.\n\ |
| 40 | All rights reserved.\n"; |
| 41 | #endif /* not lint */ |
| 42 | |
| 43 | #ifndef lint |
| 44 | static char sccsid[] = "@(#)du.c 5.12 (Berkeley) 6/20/91"; |
| 45 | #endif /* not lint */ |
| 46 | |
| 47 | #include <sys/param.h> |
| 48 | #include <sys/stat.h> |
| 49 | #include <sys/errno.h> |
| 50 | #include <dirent.h> |
| 51 | #include <stdio.h> |
| 52 | #include <fts.h> |
| 53 | #include <string.h> |
| 54 | #include <stdlib.h> |
| 55 | |
| 56 | main(argc, argv) |
| 57 | int argc; |
| 58 | char **argv; |
| 59 | { |
| 60 | extern int optind; |
| 61 | register FTS *fts; |
| 62 | register FTSENT *p; |
| 63 | register int kvalue, listdirs, listfiles; |
| 64 | int aflag, ch, ftsoptions, sflag; |
| 65 | char **save; |
| 66 | |
| 67 | ftsoptions = FTS_PHYSICAL; |
| 68 | kvalue = 0; |
| 69 | save = argv; |
| 70 | aflag = sflag = 0; |
| 71 | while ((ch = getopt(argc, argv, "aksx")) != EOF) |
| 72 | switch(ch) { |
| 73 | case 'a': |
| 74 | aflag = 1; |
| 75 | break; |
| 76 | case 'k': |
| 77 | kvalue = 1; |
| 78 | break; |
| 79 | case 's': |
| 80 | sflag = 1; |
| 81 | break; |
| 82 | case 'x': |
| 83 | ftsoptions |= FTS_XDEV; |
| 84 | break; |
| 85 | case '?': |
| 86 | default: |
| 87 | usage(); |
| 88 | } |
| 89 | argv += optind; |
| 90 | |
| 91 | if (aflag) { |
| 92 | if (sflag) |
| 93 | usage(); |
| 94 | listdirs = listfiles = 1; |
| 95 | } else if (sflag) |
| 96 | listdirs = listfiles = 0; |
| 97 | else { |
| 98 | listfiles = 0; |
| 99 | listdirs = 1; |
| 100 | } |
| 101 | |
| 102 | if (!*argv) { |
| 103 | argv = save; |
| 104 | argv[0] = "."; |
| 105 | argv[1] = NULL; |
| 106 | } |
| 107 | |
| 108 | if (!(fts = fts_open(argv, ftsoptions, (int (*)())NULL))) { |
| 109 | (void)fprintf(stderr, "du: %s.\n", strerror(errno)); |
| 110 | exit(1); |
| 111 | } |
| 112 | |
| 113 | while (p = fts_read(fts)) |
| 114 | switch(p->fts_info) { |
| 115 | case FTS_D: |
| 116 | break; |
| 117 | case FTS_DP: |
| 118 | p->fts_parent->fts_number += |
| 119 | p->fts_number += p->fts_statb.st_blocks; |
| 120 | /* |
| 121 | * If listing each directory, or not listing files |
| 122 | * or directories and this is post-order of the |
| 123 | * root of a traversal, display the total. |
| 124 | */ |
| 125 | if (listdirs || !listfiles && !p->fts_level) |
| 126 | (void)printf("%ld\t%s\n", kvalue ? |
| 127 | howmany(p->fts_number, 2) : |
| 128 | p->fts_number, p->fts_path); |
| 129 | break; |
| 130 | case FTS_DNR: |
| 131 | case FTS_ERR: |
| 132 | case FTS_NS: |
| 133 | (void)fprintf(stderr, |
| 134 | "du: %s: %s.\n", p->fts_path, strerror(errno)); |
| 135 | break; |
| 136 | case FTS_SL: |
| 137 | if (p->fts_level == FTS_ROOTLEVEL) { |
| 138 | (void)fts_set(fts, p, FTS_FOLLOW); |
| 139 | break; |
| 140 | } |
| 141 | /* FALLTHROUGH */ |
| 142 | default: |
| 143 | if (p->fts_statb.st_nlink > 1 && linkchk(p)) |
| 144 | break; |
| 145 | /* |
| 146 | * If listing each file, or a non-directory file was |
| 147 | * the root of a traversal, display the total. |
| 148 | */ |
| 149 | if (listfiles || !p->fts_level) |
| 150 | (void)printf("%ld\t%s\n", kvalue ? |
| 151 | howmany(p->fts_statb.st_blocks, 2) : |
| 152 | p->fts_statb.st_blocks, p->fts_path); |
| 153 | p->fts_parent->fts_number += p->fts_statb.st_blocks; |
| 154 | } |
| 155 | exit(0); |
| 156 | } |
| 157 | |
| 158 | typedef struct _ID { |
| 159 | dev_t dev; |
| 160 | ino_t inode; |
| 161 | } ID; |
| 162 | |
| 163 | linkchk(p) |
| 164 | register FTSENT *p; |
| 165 | { |
| 166 | static ID *files; |
| 167 | static int maxfiles, nfiles; |
| 168 | register ID *fp, *start; |
| 169 | register ino_t ino; |
| 170 | register dev_t dev; |
| 171 | |
| 172 | ino = p->fts_statb.st_ino; |
| 173 | dev = p->fts_statb.st_dev; |
| 174 | if (start = files) |
| 175 | for (fp = start + nfiles - 1; fp >= start; --fp) |
| 176 | if (ino == fp->inode && dev == fp->dev) |
| 177 | return(1); |
| 178 | |
| 179 | if (nfiles == maxfiles && !(files = (ID *)realloc((char *)files, |
| 180 | (u_int)(sizeof(ID) * (maxfiles += 128))))) { |
| 181 | (void)fprintf(stderr, "du: %s\n", strerror(errno)); |
| 182 | exit(1); |
| 183 | } |
| 184 | files[nfiles].inode = ino; |
| 185 | files[nfiles].dev = dev; |
| 186 | ++nfiles; |
| 187 | return(0); |
| 188 | } |
| 189 | |
| 190 | usage() |
| 191 | { |
| 192 | (void)fprintf(stderr, "usage: du [-a | -s] [-kx] [file ...]\n"); |
| 193 | exit(1); |
| 194 | } |