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add human readable output (-h and -H)

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Obtained from:	parts of human readable code from OpenBSD
Reviewed by:	obrien

add POSIX, byte and megabyte block size ouput flags

PR:		13579 (POSIX flag)
Submitted by:	Mike Meyer <mwm@phone.net>
This commit is contained in:
Michael Haro 1999-12-15 03:44:09 +00:00
parent bf74f9c166
commit dd6d33e86e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=54621
3 changed files with 158 additions and 12 deletions
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2
bin/df/Makefile
View File

@ -8,6 +8,8 @@ BINMODE=2555
MOUNT= ${.CURDIR}/../../sbin/mount
CFLAGS+= -I${MOUNT}
LDADD+= ${LIBM}
DPADD+= ${LIBM}
.PATH: ${MOUNT}
.include <bsd.prog.mk>

26
bin/df/df.1
View File

@ -40,7 +40,8 @@
.Nd display free disk space
.Sh SYNOPSIS
.Nm df
.Op Fl aikn
.Op Fl b | h | H | k | m | P
.Op Fl ain
.Op Fl t Ar type
.Op Ar file | Ar filesystem ...
.Sh DESCRIPTION
@ -62,6 +63,19 @@ The following options are available:
.It Fl a
Show all mount points, including those that were mounted with the MNT_IGNORE
flag.
.It Fl b
Use 512-byte blocks rather than the default. Note that
this overrides the
.Ev BLOCKSIZE
specification from the environment.
.It Fl H
"Human-readable" output. Use unit suffixes: Byte, Kilobyte, Megabyte,
Gigabyte, Terabyte and Petabyte in order to reduce the number of
digits to three or less using base 10 for sizes.
.It Fl h
"Human-readable" output. Use unit suffixes: Byte, Kilobyte, Megabyte,
Gigabyte, Terabyte and Petabyte in order to reduce the number of
digits to three or less using base 2 for sizes.
.It Fl i
Include statistics on the number of free inodes.
.It Fl k
@ -69,6 +83,11 @@ Use 1024-byte (1-Kbyte) blocks rather than the default. Note that
this overrides the
.Ev BLOCKSIZE
specification from the environment.
.It Fl m
Use 1048576-byte (1-Mbyte) blocks rather than the default. Note that
this overrides the
.Ev BLOCKSIZE
specification from the environment.
.It Fl n
Print out the previously obtained statistics from the filesystems.
This option should be used if it is possible that one or more
@ -78,6 +97,11 @@ When this option is specified,
.Nm
will not request new statistics from the filesystems, but will respond
with the possibly stale statistics that were previously obtained.
.It Fl P
Use POSIX compliant output of 512-byte blocks rather than the default.
Note that this overrides the
.Ev BLOCKSIZE
specification from the environment.
.It Fl t
Only print out statistics for filesystems of the specified types.
More than one type may be specified in a comma separated list.

142
bin/df/df.c
View File

@ -59,21 +59,55 @@ static const char rcsid[] =
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#define UNITS_SI 1
#define UNITS_2 2
#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))
#define KILO_SI_SZ (KILO_SZ(1000ULL))
#define MEGA_SI_SZ (MEGA_SZ(1000ULL))
#define GIGA_SI_SZ (GIGA_SZ(1000ULL))
#define TERA_SI_SZ (TERA_SZ(1000ULL))
#define PETA_SI_SZ (PETA_SZ(1000ULL))
unsigned long long vals_si [] = {1, KILO_SI_SZ, MEGA_SI_SZ, GIGA_SI_SZ, TERA_SI_SZ, PETA_SI_SZ};
unsigned long long vals_base2[] = {1, KILO_2_SZ, MEGA_2_SZ, GIGA_2_SZ, TERA_2_SZ, PETA_2_SZ};
unsigned long long *valp;
typedef enum { NONE, KILO, MEGA, GIGA, TERA, PETA, UNIT_MAX } unit_t;
int unitp [] = { NONE, KILO, MEGA, GIGA, TERA, PETA };
int checkvfsname __P((const char *, char **));
char **makevfslist __P((char *));
long regetmntinfo __P((struct statfs **, long, char **));
int bread __P((off_t, void *, int));
char *getmntpt __P((char *));
void prthuman __P((struct statfs *, long));
void prthumanval __P((double));
void prtstat __P((struct statfs *, int));
int ufs_df __P((char *, int));
unit_t unit_adjust __P((double *));
void usage __P((void));
int aflag = 0, iflag, nflag;
int aflag = 0, hflag, iflag, nflag;
struct ufs_args mdev;
int
@ -88,16 +122,35 @@ main(argc, argv)
char *mntpt, *mntpath, **vfslist;
vfslist = NULL;
while ((ch = getopt(argc, argv, "aiknt:")) != -1)
while ((ch = getopt(argc, argv, "abHhikmnPt:")) != -1)
switch (ch) {
case 'a':
aflag = 1;
break;
case 'b':
/* FALLTHROUGH */
case 'P':
putenv("BLOCKSIZE=512");
hflag = 0;
break;
case 'H':
hflag = UNITS_SI;
valp = vals_si;
break;
case 'h':
hflag = UNITS_2;
valp = vals_base2;
break;
case 'i':
iflag = 1;
break;
case 'k':
putenv("BLOCKSIZE=1k");
hflag = 0;
break;
case 'm':
putenv("BLOCKSIZE=1m");
hflag = 0;
break;
case 'n':
nflag = 1;
@ -248,6 +301,61 @@ regetmntinfo(mntbufp, mntsize, vfslist)
return (j);
}
/*
* 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.
*
*/
unit_t
unit_adjust(val)
double *val;
{
double abval;
unit_t unit;
unsigned int unit_sz;
abval = fabs(*val);
unit_sz = abval ? ilogb(abval) / 10 : 0;
if (unit_sz >= UNIT_MAX) {
unit = NONE;
} else {
unit = unitp[unit_sz];
*val /= (double)valp[unit_sz];
}
return (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);
}
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]);
}
/*
* Convert statfs returned filesystem size into BLOCKSIZE units.
* Attempts to avoid overflow for large filesystems.
@ -272,9 +380,16 @@ prtstat(sfsp, maxwidth)
if (maxwidth < 11)
maxwidth = 11;
if (++timesthrough == 1) {
header = getbsize(&headerlen, &blocksize);
(void)printf("%-*.*s %s Used Avail Capacity",
maxwidth, maxwidth, "Filesystem", header);
if (hflag) {
header = " Size";
headerlen = strlen(header);
(void)printf("%-*.*s %-s Used Avail Capacity",
maxwidth, maxwidth, "Filesystem", header);
} 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");
@ -282,10 +397,14 @@ prtstat(sfsp, maxwidth)
(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) {
@ -381,7 +500,8 @@ bread(off, buf, cnt)
void
usage()
{
(void)fprintf(stderr,
"usage: df [-aikn] [-t type] [file | filesystem ...]\n");
exit(1);
"usage: df [-b | -H | -h | -k | -m | -P] [-ain] [-t type] [file | filesystem ...]\n");
exit(EX_USAGE);
}