4.4BSD/usr/src/bin/df/df.c
/*
* Copyright (c) 1980, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* 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 char copyright[] =
"@(#) Copyright (c) 1980, 1990, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)df.c 8.1 (Berkeley) 6/2/93";
#endif /* not lint */
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/mount.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
/* XXX assumes MOUNT_MAXTYPE < 32 */
#define MT(m) (1 << (m))
/* fixed values */
#define MT_NONE (0)
#define MT_ALL (MT(MOUNT_MAXTYPE+1)-1)
/* subject to change */
#define MT_AMDNFS (1) /* XXX automounted NFS FSes return type 0 */
#define MT_LOCAL (MT(MOUNT_UFS)|MT(MOUNT_MFS)|MT(MOUNT_LFS))
#define MT_DEFAULT MT_ALL
struct typetab {
char *str;
long types;
} typetab[] = {
"ufs", MT(MOUNT_UFS),
"local", MT_LOCAL,
"all", MT_ALL,
"nfs", MT(MOUNT_NFS)|MT_AMDNFS,
"mfs", MT(MOUNT_MFS),
"lfs", MT(MOUNT_LFS),
"pc", MT(MOUNT_PC),
"fdesc", MT(MOUNT_FDESC),
"portal", MT(MOUNT_PORTAL),
#if 0
/* return fsid of underlying FS */
"lofs", MT(MOUNT_LOFS),
"null", MT(MOUNT_NULL),
"umap", MT(MOUNT_UMAP),
#endif
"kernfs", MT(MOUNT_KERNFS),
"misc", MT(MOUNT_LOFS)|MT(MOUNT_FDESC)|MT(MOUNT_PORTAL)|
MT(MOUNT_NULL)|MT(MOUNT_UMAP)|MT(MOUNT_KERNFS),
(char *)0, 0
};
long addtype __P((long, char *));
long regetmntinfo __P((struct statfs **, long, long));
int bread __P((off_t, void *, int));
char *getmntpt __P((char *));
void prtstat __P((struct statfs *, int));
void ufs_df __P((char *, int));
void usage __P((void));
int iflag, nflag, tflag;
struct ufs_args mdev;
int
main(argc, argv)
int argc;
char *argv[];
{
struct stat stbuf;
struct statfs statfsbuf, *mntbuf;
long mntsize;
int err, ch, i, maxwidth, width;
char *mntpt;
long fsmask;
while ((ch = getopt(argc, argv, "int:")) != EOF)
switch(ch) {
case 'i':
iflag = 1;
break;
case 'n':
nflag = 1;
break;
case 't':
fsmask = addtype(fsmask, optarg);
tflag = 1;
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;
}
if (!*argv) {
if (!tflag)
fsmask = MT_DEFAULT;
mntsize = regetmntinfo(&mntbuf, mntsize, fsmask);
if (fsmask != MT_ALL) {
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++)
prtstat(&mntbuf[i], maxwidth);
exit(0);
}
for (; *argv; argv++) {
if (stat(*argv, &stbuf) < 0) {
err = errno;
if ((mntpt = getmntpt(*argv)) == 0) {
warn("%s", *argv);
continue;
}
} else if ((stbuf.st_mode & S_IFMT) == S_IFCHR) {
ufs_df(*argv, maxwidth);
continue;
} else if ((stbuf.st_mode & S_IFMT) == S_IFBLK) {
if ((mntpt = getmntpt(*argv)) == 0) {
mntpt = mktemp(strdup("/tmp/df.XXXXXX"));
mdev.fspec = *argv;
if (mkdir(mntpt, DEFFILEMODE) != 0) {
warn("%s", mntpt);
continue;
}
if (mount(MOUNT_UFS, mntpt, MNT_RDONLY,
&mdev) != 0) {
ufs_df(*argv, maxwidth);
(void)rmdir(mntpt);
continue;
} else if (statfs(mntpt, &statfsbuf)) {
statfsbuf.f_mntonname[0] = '\0';
prtstat(&statfsbuf, maxwidth);
} else
warn("%s", *argv);
(void)unmount(mntpt, 0);
(void)rmdir(mntpt);
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);
continue;
}
if (argc == 1)
maxwidth = strlen(statfsbuf.f_mntfromname) + 1;
prtstat(&statfsbuf, maxwidth);
}
return (0);
}
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);
}
long
addtype(omask, str)
long omask;
char *str;
{
struct typetab *tp;
/*
* If it is one of our known types, add it to the current mask
*/
for (tp = typetab; tp->str; tp++)
if (strcmp(str, tp->str) == 0)
return (tp->types | (tflag ? omask : MT_NONE));
/*
* See if it is the negation of one of the known values
*/
if (strlen(str) > 2 && str[0] == 'n' && str[1] == 'o')
for (tp = typetab; tp->str; tp++)
if (strcmp(str+2, tp->str) == 0)
return (~tp->types & (tflag ? omask : MT_ALL));
(void)fprintf(stderr, "df: unknown type `%s'\n", str);
exit(1);
}
/*
* Make a pass over the filesystem info in ``mntbuf'' filtering out
* filesystem types not in ``fsmask'' and possibly re-stating to get
* current (not cached) info. Returns the new count of valid statfs bufs.
*/
long
regetmntinfo(mntbufp, mntsize, fsmask)
struct statfs **mntbufp;
long mntsize, fsmask;
{
register int i, j;
register struct statfs *mntbuf;
if (fsmask == MT_ALL)
return (nflag ? mntsize : getmntinfo(mntbufp, MNT_WAIT));
mntbuf = *mntbufp;
j = 0;
for (i = 0; i < mntsize; i++) {
if (fsmask & MT(mntbuf[i].f_type)) {
if (!nflag)
(void)statfs(mntbuf[i].f_mntonname,&mntbuf[j]);
else if (i != j)
mntbuf[j] = mntbuf[i];
j++;
}
}
return (j);
}
/*
* 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)
register struct statfs *sfsp;
int maxwidth;
{
static long blocksize;
static int headerlen, timesthrough;
static char *header;
long used, availblks, inodes;
if (maxwidth < 11)
maxwidth = 11;
if (++timesthrough == 1) {
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;
(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/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;
void
ufs_df(file, maxwidth)
char *file;
int maxwidth;
{
struct statfs statfsbuf;
register struct statfs *sfsp;
char *mntpt;
static int synced;
if (synced++ == 0)
sync();
if ((rfd = open(file, O_RDONLY)) < 0) {
warn("%s", file);
return;
}
if (bread((off_t)SBOFF, &sblock, SBSIZE) == 0) {
(void)close(rfd);
return;
}
sfsp = &statfsbuf;
sfsp->f_type = MOUNT_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 = (sblock.fs_dsize * (100 - sblock.fs_minfree) / 100) -
(sblock.fs_dsize - sfsp->f_bfree);
if (sfsp->f_bavail < 0)
sfsp->f_bavail = 0;
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, MNAMELEN);
memmove(&sfsp->f_mntfromname[0], file, MNAMELEN);
prtstat(sfsp, maxwidth);
(void)close(rfd);
}
int
bread(off, buf, cnt)
off_t off;
void *buf;
int cnt;
{
int nr;
(void)lseek(rfd, off, SEEK_SET);
if ((nr = read(rfd, buf, cnt)) != cnt) {
/* Probably a dismounted disk if errno == EIO. */
if (errno != EIO)
(void)fprintf(stderr, "\ndf: %qd: %s\n",
off, strerror(nr > 0 ? EIO : errno));
return (0);
}
return (1);
}
void
usage()
{
(void)fprintf(stderr, "usage: df [-in] [file | file_system ...]\n");
exit(1);
}