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/*
* Mini du implementation for busybox
*
*
* Copyright (C) 1999 by Lineo, inc.
* Written by John Beppu <beppu@lineo.com>
*
* 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 "internal.h"
#include <sys/types.h>
#include <fcntl.h>
#include <dirent.h>
#include <stdio.h>
#include <errno.h>
#if 0
#include <unistd.h>
#include <sys/stat.h>
#endif
typedef void (Display)(size_t, char *);
static const char du_usage[] =
"Usage: du [OPTION]... [FILE]...\n\n"
"\t-s\tdisplay only a total for each argument\n"
;
static int du_depth = 0;
static Display *print;
static void
print_null(size_t size, char *filename) { }
static void
print_normal(size_t size, char *filename)
{
fprintf(stdout, "%-7d %s\n", (size >> 1), filename);
}
static void
print_summary(size_t size, char *filename)
{
if (du_depth == 1) {
print_normal(size, filename);
}
}
/* tiny recursive du */
static size_t
du(char *filename)
{
struct stat statbuf;
size_t sum;
if ((lstat(filename, &statbuf)) != 0) {
fprintf(stdout, "du: %s: %s\n", filename, strerror(errno));
return 0;
}
du_depth++;
sum = statbuf.st_blocks;
if (S_ISDIR(statbuf.st_mode)) {
DIR *dir;
struct dirent *entry;
dir = opendir(filename);
if (!dir) { return 0; }
while ((entry = readdir(dir))) {
char newfile[512];
char *name = entry->d_name;
if ( (strcmp(name, "..") == 0)
|| (strcmp(name, ".") == 0))
{ continue; }
sprintf(newfile, "%s/%s", filename, name);
sum += du(newfile);
}
closedir(dir);
print(sum, filename);
}
du_depth--;
return sum;
}
int
du_main(int argc, char **argv)
{
int i;
char opt;
/* default behaviour */
print = print_normal;
/* parse argv[] */
for (i = 1; i < argc; i++) {
if (argv[i][0] == '-') {
opt = argv[i][1];
switch (opt) {
case 's':
print = print_summary;
break;
case 'h':
usage(du_usage);
break;
default:
fprintf(stderr, "du: invalid option -- %c\n", opt);
usage(du_usage);
}
} else {
break;
}
}
/* go through remaining args (if any) */
if (i >= argc) {
du(".");
} else {
int sum;
for ( ; i < argc; i++) {
sum = du(argv[i]);
if ((sum) && (isDirectory(argv[i]))) { print_normal(sum, argv[i]); }
}
}
exit(0);
}
/* $Id: du.c,v 1.7 1999/12/16 21:16:47 beppu Exp $ */
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