| 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Mini du implementation for busybox
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| 4 | *
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| 5 | * Copyright (C) 1999,2000,2001 by Lineo, inc. and John Beppu
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| 6 | * Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org>
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| 7 | * Copyright (C) 2002 Edward Betts <edward@debian.org>
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| 8 | *
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| 9 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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| 10 | */
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| 11 |
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| 12 | /* BB_AUDIT SUSv3 compliant (unless default blocksize set to 1k) */
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| 13 | /* http://www.opengroup.org/onlinepubs/007904975/utilities/du.html */
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| 14 |
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| 15 | /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
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| 16 | *
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| 17 | * Mostly rewritten for SUSv3 compliance and to fix bugs/defects.
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| 18 | * 1) Added support for SUSv3 -a, -H, -L, gnu -c, and (busybox) -d options.
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| 19 | * The -d option allows setting of max depth (similar to gnu --max-depth).
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| 20 | * 2) Fixed incorrect size calculations for links and directories, especially
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| 21 | * when errors occurred. Calculates sizes should now match gnu du output.
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| 22 | * 3) Added error checking of output.
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| 23 | * 4) Fixed busybox bug #1284 involving long overflow with human_readable.
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| 24 | */
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| 25 |
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| 26 | //usage:#define du_trivial_usage
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| 27 | //usage: "[-aHLdclsx" IF_FEATURE_HUMAN_READABLE("hm") "k] [FILE]..."
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| 28 | //usage:#define du_full_usage "\n\n"
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| 29 | //usage: "Summarize disk space used for each FILE and/or directory\n"
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| 30 | //usage: "\n -a Show file sizes too"
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| 31 | //usage: "\n -L Follow all symlinks"
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| 32 | //usage: "\n -H Follow symlinks on command line"
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| 33 | //usage: "\n -d N Limit output to directories (and files with -a) of depth < N"
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| 34 | //usage: "\n -c Show grand total"
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| 35 | //usage: "\n -l Count sizes many times if hard linked"
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| 36 | //usage: "\n -s Display only a total for each argument"
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| 37 | //usage: "\n -x Skip directories on different filesystems"
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| 38 | //usage: IF_FEATURE_HUMAN_READABLE(
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| 39 | //usage: "\n -h Sizes in human readable format (e.g., 1K 243M 2G)"
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| 40 | //usage: "\n -m Sizes in megabytes"
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| 41 | //usage: )
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| 42 | //usage: "\n -k Sizes in kilobytes" IF_FEATURE_DU_DEFAULT_BLOCKSIZE_1K(" (default)")
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| 43 | //usage: IF_NOT_FEATURE_DU_DEFAULT_BLOCKSIZE_1K(
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| 44 | //usage: "\n Default unit is 512 bytes"
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| 45 | //usage: )
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| 46 | //usage:
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| 47 | //usage:#define du_example_usage
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| 48 | //usage: "$ du\n"
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| 49 | //usage: "16 ./CVS\n"
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| 50 | //usage: "12 ./kernel-patches/CVS\n"
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| 51 | //usage: "80 ./kernel-patches\n"
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| 52 | //usage: "12 ./tests/CVS\n"
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| 53 | //usage: "36 ./tests\n"
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| 54 | //usage: "12 ./scripts/CVS\n"
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| 55 | //usage: "16 ./scripts\n"
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| 56 | //usage: "12 ./docs/CVS\n"
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| 57 | //usage: "104 ./docs\n"
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| 58 | //usage: "2417 .\n"
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| 59 |
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| 60 | #include "libbb.h"
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| 61 | #include "common_bufsiz.h"
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| 62 |
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| 63 | enum {
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| 64 | OPT_a_files_too = (1 << 0),
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| 65 | OPT_H_follow_links = (1 << 1),
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| 66 | OPT_k_kbytes = (1 << 2),
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| 67 | OPT_L_follow_links = (1 << 3),
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| 68 | OPT_s_total_norecurse = (1 << 4),
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| 69 | OPT_x_one_FS = (1 << 5),
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| 70 | OPT_d_maxdepth = (1 << 6),
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| 71 | OPT_l_hardlinks = (1 << 7),
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| 72 | OPT_c_total = (1 << 8),
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| 73 | OPT_h_for_humans = (1 << 9),
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| 74 | OPT_m_mbytes = (1 << 10),
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| 75 | };
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| 76 |
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| 77 | struct globals {
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| 78 | #if ENABLE_FEATURE_HUMAN_READABLE
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| 79 | unsigned long disp_unit;
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| 80 | #else
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| 81 | unsigned disp_k;
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| 82 | #endif
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| 83 | int max_print_depth;
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| 84 | bool status;
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| 85 | int slink_depth;
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| 86 | int du_depth;
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| 87 | dev_t dir_dev;
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| 88 | } FIX_ALIASING;
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| 89 | #define G (*(struct globals*)bb_common_bufsiz1)
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| 90 | #define INIT_G() do { setup_common_bufsiz(); } while (0)
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| 91 |
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| 92 |
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| 93 | static void print(unsigned long long size, const char *filename)
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| 94 | {
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| 95 | /* TODO - May not want to defer error checking here. */
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| 96 | #if ENABLE_FEATURE_HUMAN_READABLE
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| 97 | # if ENABLE_DESKTOP
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| 98 | /* ~30 bytes of code for extra comtat:
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| 99 | * coreutils' du rounds sizes up:
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| 100 | * for example, 1025k file is shown as "2" by du -m.
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| 101 | * We round to nearest if human-readable [too hard to fix],
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| 102 | * else (fixed scale such as -m), we round up. To that end,
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| 103 | * add yet another half of the unit before displaying:
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| 104 | */
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| 105 | if (G.disp_unit)
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| 106 | size += (G.disp_unit-1) / (unsigned)(512 * 2);
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| 107 | # endif
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| 108 | printf("%s\t%s\n",
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| 109 | /* size x 512 / G.disp_unit.
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| 110 | * If G.disp_unit == 0, show one fractional
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| 111 | * and use suffixes
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| 112 | */
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| 113 | make_human_readable_str(size, 512, G.disp_unit),
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| 114 | filename);
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| 115 | #else
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| 116 | if (G.disp_k) {
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| 117 | size++;
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| 118 | size >>= 1;
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| 119 | }
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| 120 | printf("%llu\t%s\n", size, filename);
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| 121 | #endif
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| 122 | }
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| 123 |
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| 124 | /* tiny recursive du */
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| 125 | static unsigned long long du(const char *filename)
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| 126 | {
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| 127 | struct stat statbuf;
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| 128 | unsigned long long sum;
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| 129 |
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| 130 | if (lstat(filename, &statbuf) != 0) {
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| 131 | bb_simple_perror_msg(filename);
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| 132 | G.status = EXIT_FAILURE;
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| 133 | return 0;
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| 134 | }
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| 135 |
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| 136 | if (option_mask32 & OPT_x_one_FS) {
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| 137 | if (G.du_depth == 0) {
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| 138 | G.dir_dev = statbuf.st_dev;
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| 139 | } else if (G.dir_dev != statbuf.st_dev) {
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| 140 | return 0;
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| 141 | }
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| 142 | }
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| 143 |
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| 144 | sum = statbuf.st_blocks;
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| 145 |
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| 146 | if (S_ISLNK(statbuf.st_mode)) {
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| 147 | if (G.slink_depth > G.du_depth) { /* -H or -L */
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| 148 | if (stat(filename, &statbuf) != 0) {
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| 149 | bb_simple_perror_msg(filename);
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| 150 | G.status = EXIT_FAILURE;
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| 151 | return 0;
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| 152 | }
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| 153 | sum = statbuf.st_blocks;
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| 154 | if (G.slink_depth == 1) {
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| 155 | /* Convert -H to -L */
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| 156 | G.slink_depth = INT_MAX;
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| 157 | }
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| 158 | }
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| 159 | }
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| 160 |
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| 161 | if (!(option_mask32 & OPT_l_hardlinks)
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| 162 | && statbuf.st_nlink > 1
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| 163 | ) {
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| 164 | /* Add files/directories with links only once */
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| 165 | if (is_in_ino_dev_hashtable(&statbuf)) {
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| 166 | return 0;
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| 167 | }
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| 168 | add_to_ino_dev_hashtable(&statbuf, NULL);
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| 169 | }
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| 170 |
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| 171 | if (S_ISDIR(statbuf.st_mode)) {
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| 172 | DIR *dir;
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| 173 | struct dirent *entry;
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| 174 | char *newfile;
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| 175 |
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| 176 | dir = warn_opendir(filename);
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| 177 | if (!dir) {
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| 178 | G.status = EXIT_FAILURE;
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| 179 | return sum;
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| 180 | }
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| 181 |
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| 182 | while ((entry = readdir(dir))) {
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| 183 | newfile = concat_subpath_file(filename, entry->d_name);
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| 184 | if (newfile == NULL)
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| 185 | continue;
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| 186 | ++G.du_depth;
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| 187 | sum += du(newfile);
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| 188 | --G.du_depth;
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| 189 | free(newfile);
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| 190 | }
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| 191 | closedir(dir);
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| 192 | } else {
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| 193 | if (!(option_mask32 & OPT_a_files_too) && G.du_depth != 0)
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| 194 | return sum;
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| 195 | }
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| 196 | if (G.du_depth <= G.max_print_depth) {
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| 197 | print(sum, filename);
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| 198 | }
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| 199 | return sum;
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| 200 | }
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| 201 |
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| 202 | int du_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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| 203 | int du_main(int argc UNUSED_PARAM, char **argv)
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| 204 | {
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| 205 | unsigned long long total;
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| 206 | int slink_depth_save;
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| 207 | unsigned opt;
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| 208 |
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| 209 | INIT_G();
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| 210 |
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| 211 | #if ENABLE_FEATURE_HUMAN_READABLE
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| 212 | IF_FEATURE_DU_DEFAULT_BLOCKSIZE_1K(G.disp_unit = 1024;)
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| 213 | IF_NOT_FEATURE_DU_DEFAULT_BLOCKSIZE_1K(G.disp_unit = 512;)
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| 214 | if (getenv("POSIXLY_CORRECT")) /* TODO - a new libbb function? */
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| 215 | G.disp_unit = 512;
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| 216 | #else
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| 217 | IF_FEATURE_DU_DEFAULT_BLOCKSIZE_1K(G.disp_k = 1;)
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| 218 | /* IF_NOT_FEATURE_DU_DEFAULT_BLOCKSIZE_1K(G.disp_k = 0;) - G is pre-zeroed */
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| 219 | #endif
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| 220 | G.max_print_depth = INT_MAX;
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| 221 |
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| 222 | /* Note: SUSv3 specifies that -a and -s options cannot be used together
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| 223 | * in strictly conforming applications. However, it also says that some
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| 224 | * du implementations may produce output when -a and -s are used together.
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| 225 | * gnu du exits with an error code in this case. We choose to simply
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| 226 | * ignore -a. This is consistent with -s being equivalent to -d 0.
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| 227 | */
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| 228 | #if ENABLE_FEATURE_HUMAN_READABLE
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| 229 | opt_complementary = "h-km:k-hm:m-hk:H-L:L-H:s-d:d-s:d+";
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| 230 | opt = getopt32(argv, "aHkLsx" "d:" "lc" "hm", &G.max_print_depth);
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| 231 | argv += optind;
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| 232 | if (opt & OPT_h_for_humans) {
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| 233 | G.disp_unit = 0;
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| 234 | }
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| 235 | if (opt & OPT_m_mbytes) {
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| 236 | G.disp_unit = 1024*1024;
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| 237 | }
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| 238 | if (opt & OPT_k_kbytes) {
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| 239 | G.disp_unit = 1024;
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| 240 | }
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| 241 | #else
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| 242 | opt_complementary = "H-L:L-H:s-d:d-s:d+";
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| 243 | opt = getopt32(argv, "aHkLsx" "d:" "lc", &G.max_print_depth);
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| 244 | argv += optind;
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| 245 | #if !ENABLE_FEATURE_DU_DEFAULT_BLOCKSIZE_1K
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| 246 | if (opt & OPT_k_kbytes) {
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| 247 | G.disp_k = 1;
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| 248 | }
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| 249 | #endif
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| 250 | #endif
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| 251 | if (opt & OPT_H_follow_links) {
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| 252 | G.slink_depth = 1;
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| 253 | }
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| 254 | if (opt & OPT_L_follow_links) {
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| 255 | G.slink_depth = INT_MAX;
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| 256 | }
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| 257 | if (opt & OPT_s_total_norecurse) {
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| 258 | G.max_print_depth = 0;
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| 259 | }
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| 260 |
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| 261 | /* go through remaining args (if any) */
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| 262 | if (!*argv) {
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| 263 | *--argv = (char*)".";
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| 264 | if (G.slink_depth == 1) {
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| 265 | G.slink_depth = 0;
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| 266 | }
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| 267 | }
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| 268 |
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| 269 | slink_depth_save = G.slink_depth;
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| 270 | total = 0;
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| 271 | do {
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| 272 | total += du(*argv);
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| 273 | /* otherwise du /dir /dir won't show /dir twice: */
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| 274 | reset_ino_dev_hashtable();
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| 275 | G.slink_depth = slink_depth_save;
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| 276 | } while (*++argv);
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| 277 |
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| 278 | if (opt & OPT_c_total)
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| 279 | print(total, "total");
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| 280 |
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| 281 | fflush_stdout_and_exit(G.status);
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| 282 | }
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