Hi,

The enclosed modifications allow du to support the -d option to
specify a maximum depth, and includes a corresponding change to the
documentation.

The -d option is present in FreeBSD's du. GNU du has similar
functionality provided by --max-depth.


David

--- /usr/src/usr.bin/du/du.1 Sun Apr 17 13:27:23 2005
+++ du/du.1 Fri Aug 11 14:27:22 2006
@@ -61,6 +61,8 @@ The options are as follows:
Display an entry for each file in the file hierarchy.
..It Fl c
Display the grand total after all the arguments have been processed.
+.It Fl d Ar depth
+Display an entry for all files and directories up to the specified
depth.
..It Fl H
Symbolic links on the command line are followed.
(Symbolic links encountered in the tree traversal are not followed.)
diff -uNp /usr/src/usr.bin/du/du.c du/du.c
--- /usr/src/usr.bin/du/du.c Wed Jan 25 06:20:03 2006
+++ du/du.c Fri Aug 11 14:53:05 2006
@@ -75,6 +75,8 @@ main(int argc, char *argv[])
quad_t totalblocks;
int ftsoptions, listdirs, listfiles;
int Hflag, Lflag, aflag, cflag, hflag, kflag, sflag;
+ unsigned int maxdepth = -1;
+ extern char *optarg;
int ch, notused, rval;
char **save;
@@ -82,7 +84,7 @@ main(int argc, char *argv[])
Hflag = Lflag = aflag = cflag = hflag = kflag = sflag = 0;
totalblocks = 0;
ftsoptions = FTS_PHYSICAL;
- while ((ch = getopt(argc, argv, "HLPachksxr")) != -1)
+ while ((ch = getopt(argc, argv, "HLPachksxrd:")) != -1)
switch (ch) {
case 'H':
Hflag = 1;
@@ -115,6 +117,9 @@ main(int argc, char *argv[])
case 'x':
ftsoptions |= FTS_XDEV;
break;
+ case 'd':
+ maxdepth = (int)strtol(optarg, (char**)NULL,
10);
+ break;
case '?':
default:
usage();
@@ -183,9 +188,14 @@ main(int argc, char *argv[])
* or directories and this is post-order of the
* root of a traversal, display the total.
*/
- if (listdirs || (!listfiles && !p->fts_level))
- prtout((quad_t)howmany(p->fts_number,
blocksize),
- p->fts_path, hflag);
+ if (listdirs || (!listfiles && !p->fts_level))
+ /*
+ * If a maximum depth is specified do
not display
+ * any directories deeper than the
specified depth
+ */
+ if (p->fts_level <= maxdepth)
+ prtout((quad_t)howmany(p-
>fts_number, blocksize),
+ p->fts_path, hflag);
break;
case FTS_DC: /* Ignore. */
break;
@@ -324,6 +334,6 @@ usage(void)
{
(void)fprintf(stderr,
- "usage: du [-a | -s] [-chkrx] [-H | -L | -P]
[file ...]\n");
+ "usage: du [-a | -s] [-chkrx] [-d depth] [-H | -L | -
P] [file ...]\n");
exit(1);
}