busybox

/* vi: set sw=4 ts=4: */

/*

 * Mini du implementation for busybox

 *

 * Copyright (C) 1999,2000,2001 by Lineo, inc. and John Beppu

 * Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org>

 * Copyright (C) 2002  Edward Betts <edward@debian.org>

 *

 * Licensed under GPLv2 or later, see file LICENSE in this source tree.

 */

​

/* BB_AUDIT SUSv3 compliant (unless default blocksize set to 1k) */

/* http://www.opengroup.org/onlinepubs/007904975/utilities/du.html */

​

/* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)

 *

 * Mostly rewritten for SUSv3 compliance and to fix bugs/defects.

 * 1) Added support for SUSv3 -a, -H, -L, gnu -c, and (busybox) -d options.

 *    The -d option allows setting of max depth (similar to gnu --max-depth).

 * 2) Fixed incorrect size calculations for links and directories, especially

 *    when errors occurred.  Calculates sizes should now match gnu du output.

 * 3) Added error checking of output.

 * 4) Fixed busybox bug #1284 involving long overflow with human_readable.

 */

​

#include "libbb.h"

​

enum {

    OPT_a_files_too    = (1 << 0),

    OPT_H_follow_links = (1 << 1),

    OPT_k_kbytes       = (1 << 2),

    OPT_L_follow_links = (1 << 3),

    OPT_s_total_norecurse = (1 << 4),

    OPT_x_one_FS       = (1 << 5),

    OPT_d_maxdepth     = (1 << 6),

    OPT_l_hardlinks    = (1 << 7),

    OPT_c_total        = (1 << 8),

    OPT_h_for_humans   = (1 << 9),

    OPT_m_mbytes       = (1 << 10),

};

​

struct globals {

#if ENABLE_FEATURE_HUMAN_READABLE

    unsigned long disp_hr;

#else

    unsigned disp_k;

#endif

    int max_print_depth;

    bool status;

    int slink_depth;

    int du_depth;

    dev_t dir_dev;

} FIX_ALIASING;

#define G (*(struct globals*)&bb_common_bufsiz1)

​

​

static void print(unsigned long size, const char *filename)

{

    /* TODO - May not want to defer error checking here. */

#if ENABLE_FEATURE_HUMAN_READABLE

    printf("%s\t%s\n",

            /* size x 512 / G.disp_hr, show one fractional,

             * use suffixes if G.disp_hr == 0 */