Hey,
This diff adds a flag to du(1) to limit the depth of results that are displayed
to the user.
The semantics are equivalent to FreeBSD's, where it is mutually exclusive with
-a and -s, and du -d 0 is equivalent to du -s.
Thoughts?
William Orr
Index: usr.bin/du/du.1
===================================================================
RCS file: /cvs/src/usr.bin/du/du.1,v
retrieving revision 1.31
diff -u -b -w -p -r1.31 du.1
--- usr.bin/du/du.1 14 Feb 2014 18:17:50 -0000 1.31
+++ usr.bin/du/du.1 16 Sep 2014 05:39:39 -0000
@@ -38,7 +38,7 @@
.Nd display disk usage statistics
.Sh SYNOPSIS
.Nm du
-.Op Fl a | s
+.Op Fl a | s | d Ar depth
.Op Fl chkrx
.Op Fl H | L | P
.Op Ar
@@ -61,6 +61,10 @@ 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 each file and directory up to
+.Ar depth
+levels
.It Fl H
Symbolic links on the command line are followed.
Symbolic links encountered in the tree traversal are not followed.
Index: usr.bin/du/du.c
===================================================================
RCS file: /cvs/src/usr.bin/du/du.c,v
retrieving revision 1.25
diff -u -b -w -p -r1.25 du.c
--- usr.bin/du/du.c 20 May 2014 01:25:23 -0000 1.25
+++ usr.bin/du/du.c 16 Sep 2014 05:39:39 -0000
@@ -40,6 +40,7 @@
#include <err.h>
#include <errno.h>
#include <fts.h>
+#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@@ -60,15 +61,17 @@ main(int argc, char *argv[])
long blocksize;
quad_t totalblocks;
int ftsoptions, listdirs, listfiles;
- int Hflag, Lflag, aflag, cflag, hflag, kflag, sflag;
+ int Hflag, Lflag, aflag, cflag, hflag, kflag, sflag, dflag;
int ch, notused, rval;
+ int maxdepth = -1;
char **save;
+ const char *errstr = NULL;
save = argv;
- Hflag = Lflag = aflag = cflag = hflag = kflag = sflag = 0;
+ Hflag = Lflag = aflag = cflag = hflag = kflag = sflag = dflag = 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;
@@ -103,6 +106,14 @@ main(int argc, char *argv[])
case 'x':
ftsoptions |= FTS_XDEV;
break;
+ case 'd':
+ maxdepth = (int)strtonum(optarg, 0, INT_MAX, &errstr);
+ if (errstr) {
+ warnx("max depth %s invalid: %s", optarg,
errstr);
+ usage();
+ }
+ dflag = 1;
+ break;
case '?':
default:
usage();
@@ -129,11 +140,12 @@ main(int argc, char *argv[])
ftsoptions |= FTS_LOGICAL;
}
- if (aflag) {
- if (sflag)
+ if (aflag + sflag + dflag > 1)
usage();
+
+ if (aflag)
listdirs = listfiles = 1;
- } else if (sflag)
+ else if (sflag || dflag)
listdirs = listfiles = 0;
else {
listfiles = 0;
@@ -172,7 +184,8 @@ main(int argc, char *argv[])
* root of a traversal, display the total.
*/
if (listdirs ||
- (!listfiles && p->fts_level == FTS_ROOTLEVEL)) {
+ (!listfiles && p->fts_level == FTS_ROOTLEVEL) ||
+ p->fts_level <= maxdepth) {
prtout((quad_t)howmany(p->fts_number,
(unsigned long)blocksize), p->fts_path,
hflag);
@@ -193,7 +206,7 @@ main(int argc, char *argv[])
* If listing each file, or a non-directory file was
* the root of a traversal, display the total.
*/
- if (listfiles || p->fts_level == FTS_ROOTLEVEL)
+ if (listfiles || p->fts_level == FTS_ROOTLEVEL ||
p->fts_level <= maxdepth)
prtout(howmany(p->fts_statp->st_blocks,
blocksize), p->fts_path, hflag);
p->fts_parent->fts_number += p->fts_statp->st_blocks;
