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/* 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>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <sys/types.h>
#include <fcntl.h>
#include <dirent.h>
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <string.h>
#include <errno.h>
#include "busybox.h"
#ifdef CONFIG_FEATURE_HUMAN_READABLE
static unsigned long disp_hr = KILOBYTE;
#endif
static int du_depth = 0;
static int count_hardlinks = 0;
static int one_file_system = 0;
static dev_t dir_dev;
static void (*print) (long, char *);
static void print_normal(long size, char *filename)
{
#ifdef CONFIG_FEATURE_HUMAN_READABLE
printf("%s\t%s\n", make_human_readable_str(size << 10, 1, disp_hr),
filename);
#else
printf("%ld\t%s\n", size, filename);
#endif
}
static void print_summary(long size, char *filename)
{
if (du_depth == 1) {
print_normal(size, filename);
}
}
/* tiny recursive du */
static long du(char *filename)
{
struct stat statbuf;
long sum;
if ((lstat(filename, &statbuf)) != 0) {
perror_msg("%s", filename);
return 0;
}
if (du_depth == 0)
dir_dev = statbuf.st_dev;
else if (one_file_system && dir_dev != statbuf.st_dev)
return 0;
du_depth++;
sum = (statbuf.st_blocks >> 1);
/* Don't add in stuff pointed to by symbolic links */
if (S_ISLNK(statbuf.st_mode)) {
sum = 0L;
if (du_depth == 1) {
}
}
if (S_ISDIR(statbuf.st_mode)) {
DIR *dir;
struct dirent *entry;
char *newfile;
dir = opendir(filename);
if (!dir) {
du_depth--;
return 0;
}
newfile = last_char_is(filename, '/');
if (newfile)
*newfile = '\0';
while ((entry = readdir(dir))) {
char *name = entry->d_name;
if ((strcmp(name, "..") == 0)
|| (strcmp(name, ".") == 0)) {
continue;
}
newfile = concat_path_file(filename, name);
sum += du(newfile);
free(newfile);
}
closedir(dir);
print(sum, filename);
} else if (statbuf.st_nlink > 1 && !count_hardlinks) {
/* Add files with hard links only once */
if (is_in_ino_dev_hashtable(&statbuf, NULL)) {
sum = 0L;
if (du_depth == 1)
print(sum, filename);
} else {
add_to_ino_dev_hashtable(&statbuf, NULL);
}
}
du_depth--;
return sum;
}
int du_main(int argc, char **argv)
{
int status = EXIT_SUCCESS;
int i;
int c;
/* default behaviour */
print = print_normal;
/* parse argv[] */
while ((c = getopt(argc, argv, "slx"
#ifdef CONFIG_FEATURE_HUMAN_READABLE
"hm"
#endif
"k")) != EOF) {
switch (c) {
case 's':
print = print_summary;
break;
case 'l':
count_hardlinks = 1;
break;
case 'x':
one_file_system = 1;
break;
#ifdef CONFIG_FEATURE_HUMAN_READABLE
case 'h':
disp_hr = 0;
break;
case 'm':
disp_hr = MEGABYTE;
break;
#endif
case 'k':
break;
default:
show_usage();
}
}
/* go through remaining args (if any) */
if (optind >= argc) {
if (du(".") == 0)
status = EXIT_FAILURE;
} else {
long sum;
for (i = optind; i < argc; i++) {
sum = du(argv[i]);
if (is_directory(argv[i], FALSE, NULL) == FALSE) {
print_normal(sum, argv[i]);
}
reset_ino_dev_hashtable();
}
}
return status;
}
/* $Id: du.c,v 1.54 2002/08/23 03:25:22 bug1 Exp $ */
/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/
|
