ls -h patch

[Jonathan Gray <khalek_(_at_)_scummvm_(_dot_)_org>]

hi,
Below is a patch to ls that adds the -h (human readable flag).
Its based on the version of ls in FreeBSD.

The patch can also be found here:
http://users.bigpond.net.au/tgray2/ls-humanval.patch

thanks
Jonathan

Index: bin/ls/Makefile
===================================================================
RCS file: /cvs/src/bin/ls/Makefile,v
retrieving revision 1.6
diff -u -r1.6 Makefile
--- bin/ls/Makefile	2000/07/19 19:27:35	1.6
+++ bin/ls/Makefile	2003/06/06 07:57:56
@@ -2,5 +2,7 @@

 PROG=	ls
 SRCS=	cmp.c ls.c main.c print.c util.c
+DPADD=	${LIBM}
+LDADD=	-lm

 .include <bsd.prog.mk>
Index: bin/ls/ls.1
===================================================================
RCS file: /cvs/src/bin/ls/ls.1,v
retrieving revision 1.36
diff -u -r1.36 ls.1
--- bin/ls/ls.1	2003/06/02 23:32:08	1.36
+++ bin/ls/ls.1	2003/06/06 07:57:57
@@ -41,7 +41,7 @@
 .Nd list directory contents
 .Sh SYNOPSIS
 .Nm ls
-.Op Fl 1ACFLRSTWacdfgiklmnopqrstux
+.Op Fl 1ACFLRSTWacdfghiklmnopqrstux
 .Op Ar file ...
 .Sh DESCRIPTION
 For each operand that names a
@@ -125,6 +125,12 @@
 .It Fl g
 Does nothing; kept for compatibility with older versions of
 .Nm ls .
+.It Fl h
+When used with the
+.Fl l
+option, use unit suffixes: Byte, Kilobyte, Megabyte, Gigabyte, Terabyte
+and Petabyte in order to reduce the number of digits to four or fewer
+using base 2 for sizes.
 .It Fl i
 For each file, print its inode number.
 .It Fl k
Index: bin/ls/ls.c
===================================================================
RCS file: /cvs/src/bin/ls/ls.c,v
retrieving revision 1.19
diff -u -r1.19 ls.c
--- bin/ls/ls.c	2003/06/02 23:32:08	1.19
+++ bin/ls/ls.c	2003/06/06 07:57:58
@@ -85,6 +85,7 @@
 int f_column;			/* columnated format */
 int f_columnacross;		/* columnated format, sorted across */
 int f_flags;			/* show flags associated with a file */
+int f_humanval;		/* show human-readable file sizes */
 int f_inode;			/* print inode */
 int f_listdir;			/* list actual directory, not contents */
 int f_listdot;			/* list files beginning with . */
@@ -134,7 +135,7 @@
 		f_listdot = 1;

 	fts_options = FTS_PHYSICAL;
-	while ((ch = getopt(argc, argv, "1ACFLRSTWacdfgiklmnopqrstux")) != -1) {
+	while ((ch = getopt(argc, argv, "1ACFLRSTWacdfghiklmnopqrstux")) != -1) {
 		switch (ch) {
 		/*
 		 * The -1, -C and -l, -m and -x options all override each
@@ -201,6 +202,9 @@
 			f_nosort = 1;
 			break;
 		case 'g':		/* Compatibility with 4.3BSD. */
+			break;
+		case 'h':
+			f_humanval = 1;
 			break;
 		case 'i':
 			f_inode = 1;
Index: bin/ls/ls.h
===================================================================
RCS file: /cvs/src/bin/ls/ls.h,v
retrieving revision 1.5
diff -u -r1.5 ls.h
--- bin/ls/ls.h	2003/06/02 23:32:08	1.5
+++ bin/ls/ls.h	2003/06/06 07:57:58
@@ -41,6 +41,7 @@

 extern int f_accesstime;	/* use time of last access */
 extern int f_flags;		/* show flags associated with a file */
+extern int f_humanval;		/* show human-readable file sizes */
 extern int f_inode;		/* print inode */
 extern int f_longform;		/* long listing format */
 extern int f_nonprint;		/* show unprintables as ? */
Index: bin/ls/print.c
===================================================================
RCS file: /cvs/src/bin/ls/print.c,v
retrieving revision 1.18
diff -u -r1.18 print.c
--- bin/ls/print.c	2003/06/02 23:32:08	1.18
+++ bin/ls/print.c	2003/06/06 07:57:58
@@ -48,6 +48,7 @@
 #include <errno.h>
 #include <fts.h>
 #include <grp.h>
+#include <math.h>
 #include <pwd.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -61,12 +62,33 @@

 static int	printaname(FTSENT *, u_long, u_long);
 static void	printlink(FTSENT *);
+static void	printsize(size_t, off_t);
 static void	printtime(time_t);
 static int	printtype(u_int);
 static int	compute_columns(DISPLAY *, int *);

 #define	IS_NOPRINT(p)	((p)->fts_number == NO_PRINT)

+#define KILO_SZ(n) (n)
+#define MEGA_SZ(n) ((n) * (n))
+#define GIGA_SZ(n) ((n) * (n) * (n))
+#define TERA_SZ(n) ((n) * (n) * (n) * (n))
+#define PETA_SZ(n) ((n) * (n) * (n) * (n) * (n))
+
+#define KILO_2_SZ (KILO_SZ(1024ULL))
+#define MEGA_2_SZ (MEGA_SZ(1024ULL))
+#define GIGA_2_SZ (GIGA_SZ(1024ULL))
+#define TERA_2_SZ (TERA_SZ(1024ULL))
+#define PETA_2_SZ (PETA_SZ(1024ULL))
+
+static unsigned long long vals_base2[] = {1, KILO_2_SZ, MEGA_2_SZ, GIGA_2_SZ, TERA_2_SZ, PETA_2_SZ};
+
+typedef enum { NONE, KILO, MEGA, GIGA, TERA, PETA, UNIT_MAX } unit_t;
+
+static unit_t unit_adjust(double *);
+
+static unit_t unitp[] = {NONE, KILO, MEGA, GIGA, TERA, PETA};
+
 void
 printscol(dp)
 	DISPLAY *dp;
@@ -116,7 +138,7 @@
 			(void)printf("%*s%*qd ",
 			    8 - dp->s_size, "", dp->s_size, sp->st_size);
 		else
-			(void)printf("%*qd ", dp->s_size, sp->st_size);
+			printsize(dp->s_size, sp->st_size);
 		if (f_accesstime)
 			printtime(sp->st_atime);
 		else if (f_statustime)
@@ -374,4 +396,53 @@
 	path[lnklen] = '\0';
 	(void)printf(" -> ");
 	(void)putname(path);
+}
+
+static void
+printsize(width, bytes)
+	size_t width;
+	off_t bytes;
+{
+	double dbytes;
+	unit_t unit;
+
+	if (f_humanval) {
+		dbytes = bytes;
+		unit = unit_adjust(&dbytes);
+
+		if (dbytes == 0)
+			(void)printf("%*s ", (u_int)width, "0B");
+		else
+			(void)printf("%*.*f%c ", (u_int)width - 1,
+			    dbytes > 10 ? 0 : 1, dbytes, "BKMGTPE"[unit]);
+	} else
+		(void)printf("%*qd ", (u_int)width, bytes);
+}
+
+/*
+ * Output in "human-readable" format.  Uses 3 digits max and puts
+ * unit suffixes at the end.  Makes output compact and easy to read,
+ * especially on huge disks.
+ *
+ */
+static unit_t
+unit_adjust(val)
+	double *val;
+{
+	double abval;
+	unit_t unit;
+	u_int unit_sz;
+
+	abval = fabs(*val);
+
+	unit_sz = abval ? (u_int)ilogb(abval) / 10 : 0;
+
+	if (unit_sz >= (u_int)UNIT_MAX)
+		unit = NONE;
+	else {
+		unit = unitp[unit_sz];
+		*val /= (double)vals_base2[unit_sz];
+	}
+
+	return (unit);
 }
Index: bin/ls/util.c
===================================================================
RCS file: /cvs/src/bin/ls/util.c,v
retrieving revision 1.8
diff -u -r1.8 util.c
--- bin/ls/util.c	2003/06/02 23:32:08	1.8
+++ bin/ls/util.c	2003/06/06 07:57:59
@@ -68,7 +68,7 @@
 usage()
 {
 	(void)fprintf(stderr,
-	    "usage: %s [-1ACFLRSTWacdfiklmnopqrstux] [file ...]\n",
+	    "usage: %s [-1ACFLRSTWacdfhiklmnopqrstux] [file ...]\n",
              __progname);
 	exit(1);
 }