This is my preliminary

    du implementation.  It
    was written from scratch
    (doesn't use recursiveAction).
    I still need to flesh out
    du_main().

diff --git a/coreutils/du.c b/coreutils/du.c
new file mode 100644 (file)
index 0000000..9e4e114
--- /dev/null
+++ b/coreutils/du.c
@@ -0,0 +1,83 @@
+/*
+ * Mini du implementation for busybox
+ *
+ *
+ * Copyright (C) 1999 by Lineo, inc.
+ * Written by John Beppu <beppu@line.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 <unistd.h>
+#include <sys/stat.h>
+*/
+
+
+typedef void (Display)(size_t, char *);
+
+static void
+print(size_t size, char *filename)
+{
+    fprintf(stdout, "%-7d %s\n", (size >> 1), filename);
+}
+
+/* tiny recursive du */
+static size_t
+size(char *filename)
+{
+    struct stat statbuf;
+    size_t     sum;
+
+    if ((lstat(filename, &statbuf)) != 0) { return 0; }
+    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 += size(newfile);
+       }
+       closedir(dir);
+       print(sum, filename);
+    }
+    return sum;
+}
+
+int 
+du_main(int argc, char **argv)
+{
+    /* I'll fill main() in shortly */
+    size(".");
+    exit(0);
+}
+

diff --git a/du.c b/du.c
new file mode 100644 (file)
index 0000000..9e4e114
--- /dev/null
+++ b/du.c
@@ -0,0 +1,83 @@
+/*
+ * Mini du implementation for busybox
+ *
+ *
+ * Copyright (C) 1999 by Lineo, inc.
+ * Written by John Beppu <beppu@line.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 <unistd.h>
+#include <sys/stat.h>
+*/
+
+
+typedef void (Display)(size_t, char *);
+
+static void
+print(size_t size, char *filename)
+{
+    fprintf(stdout, "%-7d %s\n", (size >> 1), filename);
+}
+
+/* tiny recursive du */
+static size_t
+size(char *filename)
+{
+    struct stat statbuf;
+    size_t     sum;
+
+    if ((lstat(filename, &statbuf)) != 0) { return 0; }
+    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 += size(newfile);
+       }
+       closedir(dir);
+       print(sum, filename);
+    }
+    return sum;
+}
+
+int 
+du_main(int argc, char **argv)
+{
+    /* I'll fill main() in shortly */
+    size(".");
+    exit(0);
+}
+