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mirror of https://git.FreeBSD.org/src.git synced 2024-12-24 11:29:10 +00:00
freebsd/bin/df/df.c
2001-08-01 02:09:09 +00:00

569 lines
14 KiB
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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 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.
*/
#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
#if 0
static char sccsid[] = "@(#)df.c 8.9 (Berkeley) 5/8/95";
#else
static const char rcsid[] =
"$FreeBSD$";
#endif
#endif /* not lint */
#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 <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 bread __P((off_t, void *, int));
int checkvfsname __P((const char *, char **));
char *getmntpt __P((char *));
int main __P((int, char *[]));
char *makenetvfslist __P((void));
char **makevfslist __P((char *));
void prthuman __P((struct statfs *, long));
void prthumanval __P((double));
void prtstat __P((struct statfs *, int));
long regetmntinfo __P((struct statfs **, long, char **));
int ufs_df __P((char *, int));
unit_t unit_adjust __P((double *));
void usage __P((void));
int aflag = 0, hflag, iflag, nflag;
struct ufs_args mdev;
int
main(argc, argv)
int argc;
char *argv[];
{
struct stat stbuf;
struct statfs statfsbuf, *mntbuf;
const char *fstype;
char *mntpath, *mntpt, **vfslist;
long mntsize;
int ch, i, maxwidth, rv, width;
fstype = "ufs";
vfslist = NULL;
while ((ch = getopt(argc, argv, "abgHhiklmnPt:")) != -1)
switch (ch) {
case 'a':
aflag = 1;
break;
case 'b':
/* FALLTHROUGH */
case 'P':
putenv("BLOCKSIZE=512");
hflag = 0;
break;
case 'g':
putenv("BLOCKSIZE=1g");
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 '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);
maxwidth = 0;
for (i = 0; i < mntsize; i++) {
width = strlen(mntbuf[i].f_mntfromname);
if (width > maxwidth)
maxwidth = width;
}
rv = 0;
if (!*argv) {
mntsize = regetmntinfo(&mntbuf, mntsize, vfslist);
if (vfslist != NULL) {
maxwidth = 0;
for (i = 0; i < mntsize; i++) {
width = strlen(mntbuf[i].f_mntfromname);
if (width > maxwidth)
maxwidth = width;
}
}
for (i = 0; i < mntsize; i++) {
if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0)
prtstat(&mntbuf[i], maxwidth);
}
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) {
rv = ufs_df(*argv, maxwidth) || rv;
(void)rmdir(mntpt);
free(mntpath);
continue;
} else if (statfs(mntpt, &statfsbuf) == 0) {
statfsbuf.f_mntonname[0] = '\0';
prtstat(&statfsbuf, maxwidth);
} 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;
}
if (argc == 1)
maxwidth = strlen(statfsbuf.f_mntfromname) + 1;
prtstat(&statfsbuf, maxwidth);
}
return (rv);
}
char *
getmntpt(name)
char *name;
{
long 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 filesystem info in ``mntbuf'' filtering out
* filesystem types not in vfslist and possibly re-stating to get
* current (not cached) info. Returns the new count of valid statfs bufs.
*/
long
regetmntinfo(mntbufp, mntsize, vfslist)
struct statfs **mntbufp;
long mntsize;
char **vfslist;
{
int 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;
if (!nflag)
(void)statfs(mntbuf[i].f_mntonname,&mntbuf[j]);
else if (i != j)
mntbuf[j] = mntbuf[i];
j++;
}
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.
*/
#define fsbtoblk(num, fsbs, bs) \
(((fsbs) != 0 && (fsbs) < (bs)) ? \
(num) / ((bs) / (fsbs)) : (num) * ((fsbs) / (bs)))
/*
* Print out status about a filesystem.
*/
void
prtstat(sfsp, maxwidth)
struct statfs *sfsp;
int maxwidth;
{
static long blocksize;
static int headerlen, timesthrough;
static const char *header;
long used, availblks, inodes;
if (maxwidth < 11)
maxwidth = 11;
if (++timesthrough == 1) {
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");
}
(void)printf("%-*.*s", maxwidth, maxwidth, sfsp->f_mntfromname);
used = sfsp->f_blocks - sfsp->f_bfree;
availblks = sfsp->f_bavail + used;
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) {
inodes = sfsp->f_files;
used = inodes - sfsp->f_ffree;
(void)printf(" %7ld %7ld %5.0f%% ", used, sfsp->f_ffree,
inodes == 0 ? 100.0 : (double)used / (double)inodes * 100.0);
} else
(void)printf(" ");
(void)printf(" %s\n", sfsp->f_mntonname);
}
/*
* This code constitutes the pre-system call Berkeley df code for extracting
* information from filesystem superblocks.
*/
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>
#include <errno.h>
#include <fstab.h>
union {
struct fs iu_fs;
char dummy[SBSIZE];
} sb;
#define sblock sb.iu_fs
int rfd;
int
ufs_df(file, maxwidth)
char *file;
int maxwidth;
{
struct statfs statfsbuf;
struct statfs *sfsp;
const char *mntpt;
static int synced;
if (synced++ == 0)
sync();
if ((rfd = open(file, O_RDONLY)) < 0) {
warn("%s", file);
return (1);
}
if (bread((off_t)SBOFF, &sblock, SBSIZE) == 0) {
(void)close(rfd);
return (1);
}
sfsp = &statfsbuf;
sfsp->f_type = 1;
strcpy(sfsp->f_fstypename, "ufs");
sfsp->f_flags = 0;
sfsp->f_bsize = sblock.fs_fsize;
sfsp->f_iosize = sblock.fs_bsize;
sfsp->f_blocks = sblock.fs_dsize;
sfsp->f_bfree = sblock.fs_cstotal.cs_nbfree * sblock.fs_frag +
sblock.fs_cstotal.cs_nffree;
sfsp->f_bavail = freespace(&sblock, sblock.fs_minfree);
sfsp->f_files = sblock.fs_ncg * sblock.fs_ipg;
sfsp->f_ffree = sblock.fs_cstotal.cs_nifree;
sfsp->f_fsid.val[0] = 0;
sfsp->f_fsid.val[1] = 0;
if ((mntpt = getmntpt(file)) == 0)
mntpt = "";
memmove(&sfsp->f_mntonname[0], mntpt, (size_t)MNAMELEN);
memmove(&sfsp->f_mntfromname[0], file, (size_t)MNAMELEN);
prtstat(sfsp, maxwidth);
(void)close(rfd);
return (0);
}
int
bread(off, buf, cnt)
off_t off;
void *buf;
int cnt;
{
ssize_t nr;
(void)lseek(rfd, off, SEEK_SET);
if ((nr = read(rfd, buf, (size_t)cnt)) != (ssize_t)cnt) {
/* Probably a dismounted disk if errno == EIO. */
if (errno != EIO)
(void)fprintf(stderr, "\ndf: %lld: %s\n",
(long long)off, strerror(nr > 0 ? EIO : errno));
return (0);
}
return (1);
}
void
usage()
{
(void)fprintf(stderr,
"usage: df [-b | -H | -h | -k | -m | -P] [-ailn] [-t type] [file | filesystem ...]\n");
exit(EX_USAGE);
}
char *
makenetvfslist()
{
char *str, *strptr, **listptr;
int mib[3], maxvfsconf, cnt=0, i;
size_t miblen;
struct ovfsconf *ptr;
mib[0] = CTL_VFS; mib[1] = VFS_GENERIC; mib[2] = VFS_MAXTYPENUM;
miblen=sizeof(maxvfsconf);
if (sysctl(mib, (unsigned int)(sizeof(mib) / sizeof(mib[0])),
&maxvfsconf, &miblen, NULL, 0)) {
warnx("sysctl failed");
return (NULL);
}
if ((listptr = malloc(sizeof(char*) * maxvfsconf)) == NULL) {
warnx("malloc failed");
return (NULL);
}
for (ptr = getvfsent(); ptr; ptr = getvfsent())
if (ptr->vfc_flags & VFCF_NETWORK) {
listptr[cnt++] = strdup(ptr->vfc_name);
if (listptr[cnt-1] == NULL) {
warnx("malloc failed");
return (NULL);
}
}
if ((str = malloc(sizeof(char) * (32 * cnt + cnt + 2))) == NULL) {
warnx("malloc failed");
free(listptr);
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) = NULL;
free(listptr);
return (str);
}