From 49985d6dab23172573beb37984a45eb61282395f Mon Sep 17 00:00:00 2001
From: Kiyoshi Aman <kiyoshi.aman+adelie@gmail.com>
Date: Wed, 29 May 2019 06:00:00 -0500
Subject: usr.bin/du: make buildable

---
 usr.bin/du/du.1 |  2 +-
 usr.bin/du/du.c | 94 +++++++++++++++++++++++++++++++++++----------------------
 2 files changed, 59 insertions(+), 37 deletions(-)

(limited to 'usr.bin')

diff --git a/usr.bin/du/du.1 b/usr.bin/du/du.1
index 14bb436..eb23f94 100644
--- a/usr.bin/du/du.1
+++ b/usr.bin/du/du.1
@@ -39,7 +39,7 @@
 .Nm
 .Op Fl H | Fl L | Fl P
 .Op Fl a | Fl d Ar depth | Fl s
-.Op Fl cghikmnrx
+.Op Fl chiknrx
 .Op Ar file ...
 .Sh DESCRIPTION
 The
diff --git a/usr.bin/du/du.c b/usr.bin/du/du.c
index 5b13232..213a5ef 100644
--- a/usr.bin/du/du.c
+++ b/usr.bin/du/du.c
@@ -32,32 +32,23 @@
  * SUCH DAMAGE.
  */
 
-#include <sys/cdefs.h>
-#ifndef lint
-__COPYRIGHT("@(#) Copyright (c) 1989, 1993, 1994\
- The Regents of the University of California.  All rights reserved.");
-#endif /* not lint */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)du.c	8.5 (Berkeley) 5/4/95";
-#else
-__RCSID("$NetBSD: du.c,v 1.36 2012/03/11 11:23:20 shattered Exp $");
-#endif
-#endif /* not lint */
-
+#include <sys/ioctl.h>
 #include <sys/param.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 
+#include <linux/fs.h>
+
 #include <dirent.h>
 #include <err.h>
 #include <errno.h>
 #include <fts.h>
 #include <inttypes.h>
-#include <util.h>
+#include <math.h>
+#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <bsd/stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include <limits.h>
@@ -67,7 +58,7 @@ __RCSID("$NetBSD: du.c,v 1.36 2012/03/11 11:23:20 shattered Exp $");
 
 static int	linkchk(dev_t, ino_t);
 static void	prstat(const char *, int64_t);
-__dead static void	usage(void);
+static void	usage(void);
 
 static int hflag, iflag;
 static long blocksize;
@@ -81,13 +72,13 @@ main(int argc, char *argv[])
 	int ftsoptions, listfiles;
 	int depth;
 	int Hflag, Lflag, aflag, ch, cflag, dflag, gkmflag, nflag, rval, sflag;
-	const char *noargv[2];
+	char *noargv[2];
 
 	Hflag = Lflag = aflag = cflag = dflag = gkmflag = nflag = sflag = 0;
 	totalblocks = 0;
 	ftsoptions = FTS_PHYSICAL;
 	depth = INT_MAX;
-	while ((ch = getopt(argc, argv, "HLPacd:ghikmnrsx")) != -1)
+	while ((ch = getopt(argc, argv, "HLPacd:hiknrsx")) != -1)
 		switch (ch) {
 		case 'H':
 			Hflag = 1;
@@ -115,10 +106,6 @@ main(int argc, char *argv[])
 				usage();
 			}
 			break;
-		case 'g':
-			blocksize = 1024 * 1024 * 1024;
-			gkmflag = 1;
-			break;
 		case 'h':
 			hflag = 1;
 			break;
@@ -129,10 +116,6 @@ main(int argc, char *argv[])
 			blocksize = 1024;
 			gkmflag = 1;
 			break;
-		case 'm':
-			blocksize = 1024 * 1024;
-			gkmflag = 1;
-			break; 
 		case 'n':
 			nflag = 1;
 			break;
@@ -184,11 +167,11 @@ main(int argc, char *argv[])
 	if (!*argv) {
 		noargv[0] = ".";
 		noargv[1] = NULL;
-		argv = __UNCONST(noargv);
+		argv = noargv;
 	}
 
 	if (!gkmflag)
-		(void)getbsize(NULL, &blocksize);
+		blocksize = 512;
 	blocksize /= 512;
 
 	if ((fts = fts_open(argv, ftsoptions, NULL)) == NULL)
@@ -196,13 +179,28 @@ main(int argc, char *argv[])
 
 	for (rval = 0; (p = fts_read(fts)) != NULL;) {
 		if (nflag) {
+			FILE *file;
+			int flags;
 			switch (p->fts_info) {
 			case FTS_NS:
 			case FTS_SLNONE:
 				/* nothing */
 				break;
 			default:
-				if (p->fts_statp->st_flags & UF_NODUMP) {
+				file = fopen(p->fts_name, "r");
+				if (file == NULL) {
+					fprintf(stderr, "%s: couldn't check %s: %s\n",
+					        getprogname(), p->fts_name, strerror(errno)
+						);
+					continue;
+				}
+				if (ioctl(fileno(file), FS_IOC_GETFLAGS, &flags) == -1) {
+					fprintf(stderr, "%s: couldn't check %s: %s\n",
+					        getprogname(), p->fts_name, strerror(errno)
+						);
+					continue;
+				}
+				if (flags & FS_NODUMP_FL) {
 					fts_set(fts, p, FTS_SKIP);
 					continue;
 				}
@@ -255,6 +253,36 @@ main(int argc, char *argv[])
 	exit(rval);
 }
 
+char *scale[] = {
+    "",
+    "k",
+    "M",
+    "G",
+    "T",
+    "P",
+    "E",
+    "Z",
+    "Y"
+};
+
+char *humanize(uint64_t size, bool si) {
+    uint16_t unit = si ? 1000 : 1024;
+    int8_t radix = (int8_t)(log(size)/log(unit));
+    char suffix[2], ret[10];
+    double val;
+    uint64_t temp = size;
+
+    if (radix > 9) {
+        radix = 9;
+    }
+
+    val = size / (double)pow(unit, radix);
+
+    snprintf(ret, 10, "%.0f%s%sB", val, scale[radix], (si || (radix == 0)) ? "" : "i");
+
+    return strndup(ret, 10);
+}
+
 static void
 prstat(const char *fname, int64_t blocks)
 {
@@ -264,13 +292,7 @@ prstat(const char *fname, int64_t blocks)
 	}
 
 	if (hflag) {
-		char buf[5];
-		int64_t sz = blocks * 512;
-
-		humanize_number(buf, sizeof(buf), sz, "", HN_AUTOSCALE,
-		    HN_B | HN_NOSPACE | HN_DECIMAL);
-
-		(void)printf("%s\t%s\n", buf, fname);
+		(void)printf("%s\t%s\n", humanize(blocks * 512, false), fname);
 	} else
 		(void)printf("%" PRId64 "\t%s\n",
 		    howmany(blocks, (int64_t)blocksize),
-- 
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