+/* vi: set sw=4 ts=4: */
/*
* Mini du implementation for busybox
*
*
- * Copyright (C) 1999 by Lineo, inc.
- * Written by John Beppu <beppu@line.com>
+ * Copyright (C) 1999,2000 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
*/
#include "internal.h"
+#define BB_DECLARE_EXTERN
+#define bb_need_name_too_long
+#include "messages.c"
+
#include <sys/types.h>
#include <fcntl.h>
#include <dirent.h>
#include <stdio.h>
-#if 0
-#include <unistd.h>
-#include <sys/stat.h>
-#endif
+#include <errno.h>
+
+typedef void (Display) (long, char *);
static const char du_usage[] =
-"Usage: du [OPTION]... [FILE]...\n";
+ "du [OPTION]... [FILE]...\n"
+#ifndef BB_FEATURE_TRIVIAL_HELP
+ "\nSummarizes disk space used for each FILE and/or directory.\n"
+ "Disk space is printed in units of 1024 bytes.\n\n"
+ "Options:\n"
+ "\t-l\tcount sizes many times if hard linked\n"
+ "\t-s\tdisplay only a total for each argument\n"
+#endif
+ ;
+
+static int du_depth = 0;
+static int count_hardlinks = 0;
+
+static Display *print;
-typedef void (Display)(size_t, char *);
+static void print_normal(long size, char *filename)
+{
+ fprintf(stdout, "%ld\t%s\n", size, filename);
+}
-static void
-print(size_t size, char *filename)
+static void print_summary(long size, char *filename)
{
- fprintf(stdout, "%-7d %s\n", (size >> 1), filename);
+ if (du_depth == 1) {
+ print_normal(size, filename);
+ }
}
/* tiny recursive du */
-static size_t
-du(char *filename)
+static long du(char *filename)
{
- struct stat statbuf;
- size_t sum;
+ struct stat statbuf;
+ long sum;
+ int len;
- if ((lstat(filename, &statbuf)) != 0) { return 0; }
- sum = statbuf.st_blocks;
+ if ((lstat(filename, &statbuf)) != 0) {
+ printf("du: %s: %s\n", filename, strerror(errno));
+ return 0;
+ }
+
+ du_depth++;
+ sum = (statbuf.st_blocks >> 1);
- if (S_ISDIR(statbuf.st_mode)) {
- DIR *dir;
- struct dirent *entry;
+ /* Don't add in stuff pointed to by symbolic links */
+ if (S_ISLNK(statbuf.st_mode)) {
+ sum = 0L;
+ if (du_depth == 1)
+ print(sum, filename);
+ }
+ 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;
+ dir = opendir(filename);
+ if (!dir) {
+ du_depth--;
+ return 0;
+ }
- if ( (strcmp(name, "..") == 0)
- || (strcmp(name, ".") == 0))
- { continue; }
+ len = strlen(filename);
+ if (filename[len - 1] == '/')
+ filename[--len] = '\0';
- sprintf(newfile, "%s/%s", filename, name);
- sum += du(newfile);
+ while ((entry = readdir(dir))) {
+ char newfile[BUFSIZ + 1];
+ char *name = entry->d_name;
+
+ if ((strcmp(name, "..") == 0)
+ || (strcmp(name, ".") == 0)) {
+ continue;
+ }
+
+ if (len + strlen(name) + 1 > BUFSIZ) {
+ fprintf(stderr, name_too_long, "du");
+ du_depth--;
+ return 0;
+ }
+ sprintf(newfile, "%s/%s", filename, name);
+
+ sum += du(newfile);
+ }
+ closedir(dir);
+ print(sum, filename);
}
- closedir(dir);
- print(sum, filename);
- }
- return sum;
+ 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 du_main(int argc, char **argv)
{
- int i;
- char opt;
-
- /* parse argv[] */
- for (i = 1; i < argc; i++) {
- if (argv[i][0] == '-') {
- opt = argv[i][1];
- switch (opt) {
- case 's':
- break;
- case 'h':
- usage(du_usage);
- break;
- default:
- fprintf(stderr, "du: invalid option -- %c\n", opt);
- usage(du_usage);
- }
- } else {
- break;
+ 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 'l':
+ count_hardlinks = 1;
+ break;
+ case 'h':
+ case '-':
+ 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 {
- for ( ; i < argc; i++) {
- printf("%-7d %s\n", du(argv[i]) >> 1, argv[i]);
+
+ /* go through remaining args (if any) */
+ if (i >= argc) {
+ du(".");
+ } else {
+ long sum;
+
+ for (; i < argc; i++) {
+ sum = du(argv[i]);
+ if (sum && isDirectory(argv[i], FALSE, NULL)) {
+ print_normal(sum, argv[i]);
+ }
+ reset_ino_dev_hashtable();
+ }
}
- }
- exit(0);
+ return(0);
}
-/* $Id: du.c,v 1.2 1999/12/10 06:15:27 beppu Exp $ */
+/* $Id: du.c,v 1.20 2000/06/19 17:25:39 andersen Exp $ */
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/
projects / oweals / busybox.git / blobdiff