+/* vi: set sw=4 ts=4: */
/*
* Mini du implementation for busybox
*
*
- * Copyright (C) 1999 by Lineo, inc.
+ * 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
#include <dirent.h>
#include <stdio.h>
#include <errno.h>
-#include <sys/param.h> /* for PATH_MAX */
-typedef void (Display)(long, char *);
+typedef void (Display) (long, char *);
static const char du_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_normal(long size, char *filename)
+ "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;
+
+static void print_normal(long size, char *filename)
{
- fprintf(stdout, "%-7ld %s\n", size, filename);
+ fprintf(stdout, "%ld\t%s\n", size, filename);
}
-static void
-print_summary(long size, char *filename)
+static void print_summary(long size, char *filename)
{
- if (du_depth == 1) {
- print_normal(size, filename);
- }
+ if (du_depth == 1) {
+ print_normal(size, filename);
+ }
}
-
/* tiny recursive du */
-static long
-du(char *filename)
+static long du(char *filename)
{
- struct stat statbuf;
- long 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[PATH_MAX + 1];
- char *name = entry->d_name;
-
- if ( (strcmp(name, "..") == 0)
- || (strcmp(name, ".") == 0))
- { continue; }
-
- if (strlen(filename) + strlen(name) + 1 > PATH_MAX) {
- fprintf(stderr, name_too_long, "du");
- return 0;
- }
- sprintf(newfile, "%s/%s", filename, name);
-
- sum += du(newfile);
+ struct stat statbuf;
+ long sum;
+ int len;
+
+ if ((lstat(filename, &statbuf)) != 0) {
+ printf("du: %s: %s\n", filename, strerror(errno));
+ 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)
+ print(sum, filename);
+ }
+ if (S_ISDIR(statbuf.st_mode)) {
+ DIR *dir;
+ struct dirent *entry;
+
+ dir = opendir(filename);
+ if (!dir) {
+ du_depth--;
+ return 0;
+ }
+
+ len = strlen(filename);
+ if (filename[len - 1] == '/')
+ filename[--len] = '\0';
+
+ 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) {
+ errorMsg(name_too_long);
+ du_depth--;
+ return 0;
+ }
+ sprintf(newfile, "%s/%s", filename, name);
+
+ sum += du(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);
+ }
}
- closedir(dir);
- print(sum, filename);
- }
- du_depth--;
- return sum;
+ du_depth--;
+ return sum;
}
-int
-du_main(int argc, char **argv)
+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;
+ 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:
+ errorMsg("invalid option -- %c\n", opt);
+ usage(du_usage);
+ }
+ } else {
+ break;
+ }
}
- }
- /* 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))) { print_normal(sum, 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 1.10 2000/02/07 05:29:42 erik Exp $ */
+/* $Id: du.c,v 1.21 2000/07/14 01:51:25 kraai Exp $ */
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/
projects / oweals / busybox.git / blobdiff