FreeBSD-5.3/bin/df/df.c
/*
* Copyright (c) 1980, 1990, 1993, 1994
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if 0
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1980, 1990, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)df.c 8.9 (Berkeley) 5/8/95";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/bin/df/df.c,v 1.63 2004/07/20 18:24:47 csjp Exp $");
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/mount.h>
#include <sys/sysctl.h>
#include <ufs/ufs/ufsmount.h>
#include <err.h>
#include <libutil.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#include "extern.h"
#define UNITS_SI 1
#define UNITS_2 2
/* Maximum widths of various fields. */
struct maxwidths {
int mntfrom;
int total;
int used;
int avail;
int iused;
int ifree;
};
static void addstat(struct statfs *, struct statfs *);
static char *getmntpt(const char *);
static int int64width(int64_t);
static char *makenetvfslist(void);
static void prthuman(const struct statfs *, int64_t);
static void prthumanval(int64_t);
static intmax_t fsbtoblk(int64_t, uint64_t, u_long);
static void prtstat(struct statfs *, struct maxwidths *);
static size_t regetmntinfo(struct statfs **, long, const char **);
static void update_maxwidths(struct maxwidths *, const struct statfs *);
static void usage(void);
static __inline int
imax(int a, int b)
{
return (a > b ? a : b);
}
static int aflag = 0, cflag, hflag, iflag, nflag;
static struct ufs_args mdev;
int
main(int argc, char *argv[])
{
struct stat stbuf;
struct statfs statfsbuf, totalbuf;
struct maxwidths maxwidths;
struct statfs *mntbuf;
const char *fstype;
char *mntpath, *mntpt;
const char **vfslist;
size_t i, mntsize;
int ch, rv;
fstype = "ufs";
memset(&totalbuf, 0, sizeof(totalbuf));
totalbuf.f_bsize = DEV_BSIZE;
strncpy(totalbuf.f_mntfromname, "total", MNAMELEN);
vfslist = NULL;
while ((ch = getopt(argc, argv, "abcgHhiklmnPt:")) != -1)
switch (ch) {
case 'a':
aflag = 1;
break;
case 'b':
/* FALLTHROUGH */
case 'P':
putenv("BLOCKSIZE=512");
hflag = 0;
break;
case 'c':
cflag = 1;
break;
case 'g':
putenv("BLOCKSIZE=1g");
hflag = 0;
break;
case 'H':
hflag = UNITS_SI;
break;
case 'h':
hflag = UNITS_2;
break;
case 'i':
iflag = 1;
break;
case 'k':
putenv("BLOCKSIZE=1k");
hflag = 0;
break;
case 'l':
if (vfslist != NULL)
errx(1, "-l and -t are mutually exclusive.");
vfslist = makevfslist(makenetvfslist());
break;
case 'm':
putenv("BLOCKSIZE=1m");
hflag = 0;
break;
case 'n':
nflag = 1;
break;
case 't':
if (vfslist != NULL)
errx(1, "only one -t option may be specified");
fstype = optarg;
vfslist = makevfslist(optarg);
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
bzero(&maxwidths, sizeof(maxwidths));
for (i = 0; i < mntsize; i++)
update_maxwidths(&maxwidths, &mntbuf[i]);
rv = 0;
if (!*argv) {
mntsize = regetmntinfo(&mntbuf, mntsize, vfslist);
bzero(&maxwidths, sizeof(maxwidths));
for (i = 0; i < mntsize; i++) {
if (cflag)
addstat(&totalbuf, &mntbuf[i]);
update_maxwidths(&maxwidths, &mntbuf[i]);
}
if (cflag)
update_maxwidths(&maxwidths, &totalbuf);
for (i = 0; i < mntsize; i++)
if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0)
prtstat(&mntbuf[i], &maxwidths);
if (cflag)
prtstat(&totalbuf, &maxwidths);
exit(rv);
}
for (; *argv; argv++) {
if (stat(*argv, &stbuf) < 0) {
if ((mntpt = getmntpt(*argv)) == 0) {
warn("%s", *argv);
rv = 1;
continue;
}
} else if (S_ISCHR(stbuf.st_mode)) {
if ((mntpt = getmntpt(*argv)) == 0) {
mdev.fspec = *argv;
mntpath = strdup("/tmp/df.XXXXXX");
if (mntpath == NULL) {
warn("strdup failed");
rv = 1;
continue;
}
mntpt = mkdtemp(mntpath);
if (mntpt == NULL) {
warn("mkdtemp(\"%s\") failed", mntpath);
rv = 1;
free(mntpath);
continue;
}
if (mount(fstype, mntpt, MNT_RDONLY,
&mdev) != 0) {
warn("%s", *argv);
rv = 1;
(void)rmdir(mntpt);
free(mntpath);
continue;
} else if (statfs(mntpt, &statfsbuf) == 0) {
statfsbuf.f_mntonname[0] = '\0';
prtstat(&statfsbuf, &maxwidths);
if (cflag)
addstat(&totalbuf, &statfsbuf);
} else {
warn("%s", *argv);
rv = 1;
}
(void)unmount(mntpt, 0);
(void)rmdir(mntpt);
free(mntpath);
continue;
}
} else
mntpt = *argv;
/*
* Statfs does not take a `wait' flag, so we cannot
* implement nflag here.
*/
if (statfs(mntpt, &statfsbuf) < 0) {
warn("%s", mntpt);
rv = 1;
continue;
}
/*
* Check to make sure the arguments we've been given are
* satisfied. Return an error if we have been asked to
* list a mount point that does not match the other args
* we've been given (-l, -t, etc.).
*/
if (checkvfsname(statfsbuf.f_fstypename, vfslist)) {
rv = 1;
continue;
}
if (argc == 1) {
bzero(&maxwidths, sizeof(maxwidths));
update_maxwidths(&maxwidths, &statfsbuf);
}
prtstat(&statfsbuf, &maxwidths);
if (cflag)
addstat(&totalbuf, &statfsbuf);
}
if (cflag)
prtstat(&totalbuf, &maxwidths);
return (rv);
}
static char *
getmntpt(const char *name)
{
size_t mntsize, i;
struct statfs *mntbuf;
mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
for (i = 0; i < mntsize; i++) {
if (!strcmp(mntbuf[i].f_mntfromname, name))
return (mntbuf[i].f_mntonname);
}
return (0);
}
/*
* Make a pass over the file system info in ``mntbuf'' filtering out
* file system types not in vfslist and possibly re-stating to get
* current (not cached) info. Returns the new count of valid statfs bufs.
*/
static size_t
regetmntinfo(struct statfs **mntbufp, long mntsize, const char **vfslist)
{
int error, i, j;
struct statfs *mntbuf;
if (vfslist == NULL)
return (nflag ? mntsize : getmntinfo(mntbufp, MNT_WAIT));
mntbuf = *mntbufp;
for (j = 0, i = 0; i < mntsize; i++) {
if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
continue;
/*
* XXX statfs(2) can fail for various reasons. It may be
* possible that the user does not have access to the
* pathname, if this happens, we will fall back on
* "stale" filesystem statistics.
*/
error = statfs(mntbuf[i].f_mntonname, &mntbuf[j]);
if (nflag || error < 0)
if (i != j) {
if (error < 0)
warnx("%s stats possibly stale",
mntbuf[i].f_mntonname);
mntbuf[j] = mntbuf[i];
}
j++;
}
return (j);
}
static void
prthuman(const struct statfs *sfsp, int64_t used)
{
prthumanval(sfsp->f_blocks * sfsp->f_bsize);
prthumanval(used * sfsp->f_bsize);
prthumanval(sfsp->f_bavail * sfsp->f_bsize);
}
static void
prthumanval(int64_t bytes)
{
char buf[6];
int flags;
flags = HN_B | HN_NOSPACE | HN_DECIMAL;
if (hflag == UNITS_SI)
flags |= HN_DIVISOR_1000;
humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1),
bytes, "", HN_AUTOSCALE, flags);
(void)printf(" %6s", buf);
}
/*
* Convert statfs returned file system size into BLOCKSIZE units.
* Attempts to avoid overflow for large file systems.
*/
static intmax_t
fsbtoblk(int64_t num, uint64_t fsbs, u_long bs)
{
if (fsbs != 0 && fsbs < bs)
return (num / (intmax_t)(bs / fsbs));
else
return (num * (intmax_t)(fsbs / bs));
}
/*
* Print out status about a file system.
*/
static void
prtstat(struct statfs *sfsp, struct maxwidths *mwp)
{
static u_long blocksize;
static int headerlen, timesthrough = 0;
static const char *header;
int64_t used, availblks, inodes;
if (++timesthrough == 1) {
mwp->mntfrom = imax(mwp->mntfrom, (int)strlen("Filesystem"));
if (hflag) {
header = " Size";
mwp->total = mwp->used = mwp->avail =
(int)strlen(header);
} else {
header = getbsize(&headerlen, &blocksize);
mwp->total = imax(mwp->total, headerlen);
}
mwp->used = imax(mwp->used, (int)strlen("Used"));
mwp->avail = imax(mwp->avail, (int)strlen("Avail"));
(void)printf("%-*s %-*s %*s %*s Capacity",
mwp->mntfrom, "Filesystem", mwp->total, header,
mwp->used, "Used", mwp->avail, "Avail");
if (iflag) {
mwp->iused = imax(mwp->iused, (int)strlen(" iused"));
mwp->ifree = imax(mwp->ifree, (int)strlen("ifree"));
(void)printf(" %*s %*s %%iused",
mwp->iused - 2, "iused", mwp->ifree, "ifree");
}
(void)printf(" Mounted on\n");
}
(void)printf("%-*s", mwp->mntfrom, sfsp->f_mntfromname);
used = sfsp->f_blocks - sfsp->f_bfree;
availblks = sfsp->f_bavail + used;
if (hflag) {
prthuman(sfsp, used);
} else {
(void)printf(" %*jd %*jd %*jd",
mwp->total, fsbtoblk(sfsp->f_blocks,
sfsp->f_bsize, blocksize),
mwp->used, fsbtoblk(used, sfsp->f_bsize, blocksize),
mwp->avail, fsbtoblk(sfsp->f_bavail,
sfsp->f_bsize, blocksize));
}
(void)printf(" %5.0f%%",
availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
if (iflag) {
inodes = sfsp->f_files;
used = inodes - sfsp->f_ffree;
(void)printf(" %*jd %*jd %4.0f%% ", mwp->iused, (intmax_t)used,
mwp->ifree, (intmax_t)sfsp->f_ffree, inodes == 0 ? 100.0 :
(double)used / (double)inodes * 100.0);
} else
(void)printf(" ");
if (strncmp(sfsp->f_mntfromname, "total", MNAMELEN) != 0)
(void)printf(" %s", sfsp->f_mntonname);
(void)printf("\n");
}
void
addstat(struct statfs *totalfsp, struct statfs *statfsp)
{
uint64_t bsize;
bsize = statfsp->f_bsize / totalfsp->f_bsize;
totalfsp->f_blocks += statfsp->f_blocks * bsize;
totalfsp->f_bfree += statfsp->f_bfree * bsize;
totalfsp->f_bavail += statfsp->f_bavail * bsize;
totalfsp->f_files += statfsp->f_files;
totalfsp->f_ffree += statfsp->f_ffree;
}
/*
* Update the maximum field-width information in `mwp' based on
* the file system specified by `sfsp'.
*/
static void
update_maxwidths(struct maxwidths *mwp, const struct statfs *sfsp)
{
static u_long blocksize = 0;
int dummy;
if (blocksize == 0)
getbsize(&dummy, &blocksize);
mwp->mntfrom = imax(mwp->mntfrom, (int)strlen(sfsp->f_mntfromname));
mwp->total = imax(mwp->total, int64width(
fsbtoblk((int64_t)sfsp->f_blocks, sfsp->f_bsize, blocksize)));
mwp->used = imax(mwp->used,
int64width(fsbtoblk((int64_t)sfsp->f_blocks -
(int64_t)sfsp->f_bfree, sfsp->f_bsize, blocksize)));
mwp->avail = imax(mwp->avail, int64width(fsbtoblk(sfsp->f_bavail,
sfsp->f_bsize, blocksize)));
mwp->iused = imax(mwp->iused, int64width((int64_t)sfsp->f_files -
sfsp->f_ffree));
mwp->ifree = imax(mwp->ifree, int64width(sfsp->f_ffree));
}
/* Return the width in characters of the specified value. */
static int
int64width(int64_t val)
{
int len;
len = 0;
/* Negative or zero values require one extra digit. */
if (val <= 0) {
val = -val;
len++;
}
while (val > 0) {
len++;
val /= 10;
}
return (len);
}
static void
usage(void)
{
(void)fprintf(stderr,
"usage: df [-b | -g | -H | -h | -k | -m | -P] [-aciln] [-t type] [file | filesystem ...]\n");
exit(EX_USAGE);
}
static char *
makenetvfslist(void)
{
char *str, *strptr, **listptr;
struct xvfsconf *xvfsp, *keep_xvfsp;
size_t buflen;
int cnt, i, maxvfsconf;
if (sysctlbyname("vfs.conflist", NULL, &buflen, NULL, 0) < 0) {
warn("sysctl(vfs.conflist)");
return (NULL);
}
xvfsp = malloc(buflen);
if (xvfsp == NULL) {
warnx("malloc failed");
return (NULL);
}
keep_xvfsp = xvfsp;
if (sysctlbyname("vfs.conflist", xvfsp, &buflen, NULL, 0) < 0) {
warn("sysctl(vfs.conflist)");
free(keep_xvfsp);
return (NULL);
}
maxvfsconf = buflen / sizeof(struct xvfsconf);
if ((listptr = malloc(sizeof(char*) * maxvfsconf)) == NULL) {
warnx("malloc failed");
free(keep_xvfsp);
return (NULL);
}
for (cnt = 0, i = 0; i < maxvfsconf; i++) {
if (xvfsp->vfc_flags & VFCF_NETWORK) {
listptr[cnt++] = strdup(xvfsp->vfc_name);
if (listptr[cnt-1] == NULL) {
warnx("malloc failed");
free(listptr);
free(keep_xvfsp);
return (NULL);
}
}
xvfsp++;
}
if (cnt == 0 ||
(str = malloc(sizeof(char) * (32 * cnt + cnt + 2))) == NULL) {
if (cnt > 0)
warnx("malloc failed");
free(listptr);
free(keep_xvfsp);
return (NULL);
}
*str = 'n'; *(str + 1) = 'o';
for (i = 0, strptr = str + 2; i < cnt; i++, strptr++) {
strncpy(strptr, listptr[i], 32);
strptr += strlen(listptr[i]);
*strptr = ',';
free(listptr[i]);
}
*(--strptr) = '\0';
free(keep_xvfsp);
free(listptr);
return (str);
}