Not sure if -hackers is the place for this, but here goes.
Here's a patch to add -h flag to df to produce human readable
output. This makes it easier to read if the disk is big.
Example:
[badmofo@/home/matt] df -h
Filesystem Size Used Avail Capacity Mounted on
/dev/wd0s1a 722M 20M 644M 3% /
/dev/wd0s2h 9.9G 4.4G 4.8G 48% /usr
procfs 4.0K 4.0K 0B 100% /proc
....
Code merged from OpenBSD and added to FreeBSD-STABLE.
[badmofo@/usr/src/bin/df] diff -u df df~
diff -u df/df.1 df~/df.1
--- df/df.1 Sun Aug 29 10:12:14 1999
+++ df~/df.1 Mon Nov 29 22:57:01 1999
@@ -40,7 +40,7 @@
.Nd display free disk space
.Sh SYNOPSIS
.Nm df
-.Op Fl ikn
+.Op Fl hikn
.Op Fl t Ar type
.Op Ar file | Ar filesystem ...
.Sh DESCRIPTION
@@ -59,6 +59,10 @@
.Pp
The following options are available:
.Bl -tag -width Ds
+.It Fl h
+"Human-readable" output. Use unit suffixes: Byte, Kilobyte, Megabyte,
+Gigabyte, Terabyte, Petabyte, Exabyte in order to reduce the number of
+digits to four or less.
.It Fl i
Include statistics on the number of free inodes.
.It Fl k
diff -u df/df.c df~/df.c
--- df/df.c Sun Aug 29 10:12:15 1999
+++ df~/df.c Mon Nov 29 22:57:01 1999
@@ -59,11 +59,14 @@
#include <err.h>
#include <errno.h>
#include <fcntl.h>
+#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
+typedef enum { NONE = 0, KILO, MEGA, GIGA, TERA, PETA /* , EXA */ } unit_t;
+
int checkvfsname __P((const char *, char **));
char **makevfslist __P((char *));
long regetmntinfo __P((struct statfs **, long, char **));
@@ -71,9 +74,12 @@
char *getmntpt __P((char *));
void prtstat __P((struct statfs *, int));
int ufs_df __P((char *, int));
+unit_t unit_adjust __P((double *));
+void prthumanval __P((double));
+void prthuman __P((struct statfs *, long));
void usage __P((void));
-int iflag, nflag;
+int iflag, nflag, hflag;
struct ufs_args mdev;
int
@@ -88,8 +94,11 @@
char *mntpt, *mntpath, **vfslist;
vfslist = NULL;
- while ((ch = getopt(argc, argv, "iknt:")) != -1)
+ while ((ch = getopt(argc, argv, "hiknt:")) != -1)
switch (ch) {
+ case 'h':
+ hflag = 1;
+ break;
case 'i':
iflag = 1;
break;
@@ -267,20 +276,26 @@
if (maxwidth < 11)
maxwidth = 11;
if (++timesthrough == 1) {
- header = getbsize(&headerlen, &blocksize);
- (void)printf("%-*.*s %s Used Avail Capacity",
+ if(hflag)
+ header = " Size";
+ else
+ header = getbsize(&headerlen, &blocksize);
+ (void)printf("%-*.*s %s Used Avail Capacity",
maxwidth, maxwidth, "Filesystem", header);
if (iflag)
(void)printf(" iused ifree %%iused");
- (void)printf(" Mounted on\n");
+ (void)printf(" Mounted on\n");
}
(void)printf("%-*.*s", maxwidth, maxwidth, sfsp->f_mntfromname);
used = sfsp->f_blocks - sfsp->f_bfree;
availblks = sfsp->f_bavail + used;
- (void)printf(" %*ld %8ld %8ld", headerlen,
- fsbtoblk(sfsp->f_blocks, sfsp->f_bsize, blocksize),
- fsbtoblk(used, sfsp->f_bsize, blocksize),
- fsbtoblk(sfsp->f_bavail, sfsp->f_bsize, blocksize));
+ if(hflag)
+ prthuman(sfsp, used);
+ else
+ (void)printf(" %*ld %8ld %8ld", headerlen,
+ fsbtoblk(sfsp->f_blocks, sfsp->f_bsize, blocksize),
+ fsbtoblk(used, sfsp->f_bsize, blocksize),
+ fsbtoblk(sfsp->f_bavail, sfsp->f_bsize, blocksize));
(void)printf(" %5.0f%%",
availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
if (iflag) {
@@ -290,7 +305,67 @@
inodes == 0 ? 100.0 : (double)used / (double)inodes * 100.0);
} else
(void)printf(" ");
- (void)printf(" %s\n", sfsp->f_mntonname);
+ (void)printf(" %s\n", sfsp->f_mntonname);
+}
+
+/*
+ * "human-readable" output: use 3 digits max.--put unit suffixes at
+ * the end. Makes output compact and easy-to-read esp. on huge disks.
+ */
+
+unit_t
+unit_adjust(val)
+ double *val;
+{
+ double abval;
+ unit_t unit;
+
+ abval = fabs(*val);
+ if (abval < 1024)
+ unit = NONE;
+ else if (abval < 1048576ULL) {
+ unit = KILO;
+ *val /= 1024;
+ } else if (abval < 1073741824ULL) {
+ unit = MEGA;
+ *val /= 1048576;
+ } else if (abval < 1099511627776ULL) {
+ unit = GIGA;
+ *val /= 1073741824ULL;
+ } else if (abval < 1125899906842624ULL) {
+ unit = TERA;
+ *val /= 1099511627776ULL;
+ } else if (abval < 1152921504606846976ULL) {
+ unit = PETA;
+ *val /= 1125899906842624ULL;
+ }
+ return (unit);
+}
+
+void
+prthumanval(bytes)
+ double bytes;
+{
+ unit_t unit;
+
+ unit = unit_adjust(&bytes);
+
+ if (bytes == 0)
+ (void)printf(" 0B");
+ else if (bytes > 10)
+ (void)printf(" %5.0f%c", bytes, "BKMGTPE"[unit]);
+ else
+ (void)printf(" %5.1f%c", bytes, "BKMGTPE"[unit]);
+}
+
+void
+prthuman(sfsp, used)
+ struct statfs *sfsp;
+ long used;
+{
+ prthumanval((double)(sfsp->f_blocks) * (double)(sfsp->f_bsize));
+ prthumanval((double)(used) * (double)(sfsp->f_bsize));
+ prthumanval((double)(sfsp->f_bavail) * (double)(sfsp->f_bsize));
}
/*
@@ -377,6 +452,6 @@
usage()
{
(void)fprintf(stderr,
- "usage: df [-ikn] [-t type] [file | filesystem ...]\n");
+ "usage: df [-hikn] [-t type] [file | filesystem ...]\n");
exit(1);
}
Only in df~: extern.h
Only in df~: vfslist.c
--
http://www.csis.gvsu.edu/matt
03 F8 23 C5 43 A2 F7 5A 24 49 F7 B0 3A F9 B1 7F
Try to understand everything, but believe nothing
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