1 files changed, 269 insertions, 0 deletions
diff --git a/busybox/coreutils/du.c b/busybox/coreutils/du.c
new file mode 100644
index 0000000..bfa4403
--- /dev/null
+++ b/busybox/coreutils/du.c
@@ -0,0 +1,269 @@
+/* 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
+ *
+ */
+
+/* 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 <stdlib.h>
+#include <limits.h>
+#include <unistd.h>
+#include <dirent.h>
+#include <sys/stat.h>
+#include "busybox.h"
+
+#ifdef CONFIG_FEATURE_HUMAN_READABLE
+# ifdef CONFIG_FEATURE_DU_DEFALT_BLOCKSIZE_1K
+static unsigned long disp_hr = KILOBYTE;
+# else
+static unsigned long disp_hr = 512;
+# endif
+#elif defined CONFIG_FEATURE_DU_DEFALT_BLOCKSIZE_1K
+static unsigned int disp_k = 1;
+#else
+static unsigned int disp_k;	/* bss inits to 0 */
+#endif
+
+static int max_print_depth = INT_MAX;
+static int count_hardlinks = 1;
+
+static int status
+#if EXIT_SUCCESS == 0
+	= EXIT_SUCCESS
+#endif
+	;
+static int print_files;
+static int slink_depth;
+static int du_depth;
+static int one_file_system;
+static dev_t dir_dev;
+
+
+static void print(long size, char *filename)
+{
+	/* TODO - May not want to defer error checking here. */
+#ifdef CONFIG_FEATURE_HUMAN_READABLE
+	bb_printf("%s\t%s\n", make_human_readable_str(size, 512, disp_hr),
+		   filename);
+#else
+	if (disp_k) {
+		size++;
+		size >>= 1;
+	}
+	bb_printf("%ld\t%s\n", size, filename);
+#endif
+}
+
+/* tiny recursive du */
+static long du(char *filename)
+{
+	struct stat statbuf;
+	long sum;
+
+	if ((lstat(filename, &statbuf)) != 0) {
+		bb_perror_msg("%s", filename);
+		status = EXIT_FAILURE;
+		return 0;
+	}
+
+	if (one_file_system) {
+		if (du_depth == 0) {
+			dir_dev = statbuf.st_dev;
+		} else if (dir_dev != statbuf.st_dev) {
+			return 0;
+		}
+	}
+
+	sum = statbuf.st_blocks;
+
+	if (S_ISLNK(statbuf.st_mode)) {
+		if (slink_depth > du_depth) {	/* -H or -L */
+			if ((stat(filename, &statbuf)) != 0) {
+				bb_perror_msg("%s", filename);
+				status = EXIT_FAILURE;
+				return 0;
+			}
+			sum = statbuf.st_blocks;
+			if (slink_depth == 1) {
+				slink_depth = INT_MAX;	/* Convert -H to -L. */
+			}
+		}
+	}
+
+	if (statbuf.st_nlink > count_hardlinks) {
+		/* Add files/directories with links only once */
+		if (is_in_ino_dev_hashtable(&statbuf, NULL)) {
+			return 0;
+		}
+		add_to_ino_dev_hashtable(&statbuf, NULL);
+	}
+
+	if (S_ISDIR(statbuf.st_mode)) {
+		DIR *dir;
+		struct dirent *entry;
+		char *newfile;
+
+		dir = opendir(filename);
+		if (!dir) {
+			bb_perror_msg("%s", filename);
+			status = EXIT_FAILURE;
+			return sum;
+		}
+
+		newfile = last_char_is(filename, '/');
+		if (newfile)
+			*newfile = '\0';
+
+		while ((entry = readdir(dir))) {
+			char *name = entry->d_name;
+
+			newfile = concat_subpath_file(filename, name);
+			if(newfile == NULL)
+				continue;
+			++du_depth;
+			sum += du(newfile);
+			--du_depth;
+			free(newfile);
+		}
+		closedir(dir);
+	} else if (du_depth > print_files) {
+		return sum;
+	}
+	if (du_depth <= max_print_depth) {
+		print(sum, filename);
+	}
+	return sum;
+}
+
+int du_main(int argc, char **argv)
+{
+	long total;
+	int slink_depth_save;
+	int print_final_total;
+	char *smax_print_depth;
+	unsigned long opt;
+
+#ifdef CONFIG_FEATURE_DU_DEFALT_BLOCKSIZE_1K
+	if (getenv("POSIXLY_CORRECT")) {	/* TODO - a new libbb function? */
+#ifdef CONFIG_FEATURE_HUMAN_READABLE
+		disp_hr = 512;
+#else
+		disp_k = 0;
+#endif
+	}
+#endif
+
+	/* Note: SUSv3 specifies that -a and -s options can not be used together
+	 * in strictly conforming applications.  However, it also says that some
+	 * du implementations may produce output when -a and -s are used together.
+	 * gnu du exits with an error code in this case.  We choose to simply
+	 * ignore -a.  This is consistent with -s being equivalent to -d 0.
+	 */
+#ifdef CONFIG_FEATURE_HUMAN_READABLE
+	bb_opt_complementaly = "h-km:k-hm:m-hk:H-L:L-H:s-d:d-s";
+	opt = bb_getopt_ulflags(argc, argv, "aHkLsx" "d:" "lc" "hm", &smax_print_depth);
+	if((opt & (1 << 9))) {
+		/* -h opt */
+		disp_hr = 0;
+	}
+	if((opt & (1 << 10))) {
+		/* -m opt */
+		disp_hr = MEGABYTE;
+	}
+	if((opt & (1 << 2))) {
+		/* -k opt */
+			disp_hr = KILOBYTE;
+	}
+#else
+	bb_opt_complementaly = "H-L:L-H:s-d:d-s";
+	opt = bb_getopt_ulflags(argc, argv, "aHkLsx" "d:" "lc", &smax_print_depth);
+#if !defined CONFIG_FEATURE_DU_DEFALT_BLOCKSIZE_1K
+	if((opt & (1 << 2))) {
+		/* -k opt */
+			disp_k = 1;
+	}
+#endif
+#endif
+	if((opt & (1 << 0))) {
+		/* -a opt */
+		print_files = INT_MAX;
+	}
+	if((opt & (1 << 1))) {
+		/* -H opt */
+		slink_depth = 1;
+	}
+	if((opt & (1 << 3))) {
+		/* -L opt */
+			slink_depth = INT_MAX;
+	}
+	if((opt & (1 << 4))) {
+		/* -s opt */
+			max_print_depth = 0;
+		}
+	one_file_system = opt & (1 << 5); /* -x opt */
+	if((opt & (1 << 6))) {
+		/* -d opt */
+		max_print_depth = bb_xgetularg10_bnd(smax_print_depth, 0, INT_MAX);
+	}
+	if((opt & (1 << 7))) {
+		/* -l opt */
+		count_hardlinks = INT_MAX;
+	}
+	print_final_total = opt & (1 << 8); /* -c opt */
+
+	/* go through remaining args (if any) */
+	argv += optind;
+	if (optind >= argc) {
+		*--argv = ".";
+		if (slink_depth == 1) {
+			slink_depth = 0;
+		}
+	}
+
+	slink_depth_save = slink_depth;
+	total = 0;
+	do {
+		total += du(*argv);
+		slink_depth = slink_depth_save;
+	} while (*++argv);
+#ifdef CONFIG_FEATURE_CLEAN_UP
+	reset_ino_dev_hashtable();
+#endif
+
+	if (print_final_total) {
+		print(total, "total");
+	}
+
+	bb_fflush_stdout_and_exit(status);
+}