NetBSD/bin/df/df.c

449 lines
11 KiB
C

/* $NetBSD: df.c,v 1.30 1998/07/28 05:31:24 mycroft Exp $ */
/*
* 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.
*/
#include <sys/cdefs.h>
#ifndef lint
__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 8.7 (Berkeley) 4/2/94";
#else
__RCSID("$NetBSD: df.c,v 1.30 1998/07/28 05:31:24 mycroft Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/mount.h>
#include <ufs/ufs/ufsmount.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
extern char * strpct __P((u_long num, u_long denom, u_int digits));
int main __P((int, char *[]));
int bread __P((off_t, void *, int));
char *getmntpt __P((char *));
void prtstat __P((struct statfs *, int));
int ufs_df __P((char *, struct statfs *));
int selected __P((const char *));
void maketypelist __P((char *));
long regetmntinfo __P((struct statfs **, long));
void usage __P((void));
int iflag, kflag, lflag, nflag;
char **typelist = NULL;
struct ufs_args mdev;
int
main(argc, argv)
int argc;
char *argv[];
{
struct stat stbuf;
struct statfs *mntbuf;
long mntsize;
int ch, i, maxwidth, width;
char *mntpt;
while ((ch = getopt(argc, argv, "iklnt:")) != -1)
switch (ch) {
case 'i':
iflag = 1;
break;
case 'k':
kflag = 1;
break;
case 'l':
lflag = 1;
break;
case 'n':
nflag = 1;
break;
case 't':
if (typelist != NULL)
errx(1, "only one -t option may be specified.");
maketypelist(optarg);
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
if (mntsize == 0)
err(1, "retrieving information on mounted file systems");
if (!*argv) {
mntsize = regetmntinfo(&mntbuf, mntsize);
} else {
mntbuf = malloc(argc * sizeof(struct statfs));
mntsize = 0;
for (; *argv; argv++) {
if (stat(*argv, &stbuf) < 0) {
if ((mntpt = getmntpt(*argv)) == 0) {
warn("%s", *argv);
continue;
}
} else if (S_ISCHR(stbuf.st_mode)) {
if (!ufs_df(*argv, &mntbuf[mntsize]))
++mntsize;
continue;
} else if (S_ISBLK(stbuf.st_mode)) {
if ((mntpt = getmntpt(*argv)) == 0) {
mntpt = strdup("/tmp/df.XXXXXX");
if (!mkdtemp(mntpt)) {
warn("%s", mntpt);
continue;
}
mdev.fspec = *argv;
if (mount(MOUNT_FFS, mntpt, MNT_RDONLY,
&mdev) != 0) {
(void)rmdir(mntpt);
if (!ufs_df(*argv,
&mntbuf[mntsize]))
++mntsize;
continue;
} else if (!statfs(mntpt,
&mntbuf[mntsize])) {
mntbuf[mntsize].f_mntonname[0] =
'\0';
++mntsize;
} 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, &mntbuf[mntsize]))
if (lflag &&
(mntbuf[mntsize].f_flags & MNT_LOCAL) == 0)
warnx("Warning: %s is not a local %s",
*argv, "file system");
else if
(!selected(mntbuf[mntsize].f_fstypename))
warnx("Warning: %s mounted as a %s %s",
*argv,
mntbuf[mntsize].f_fstypename,
"file system");
else
++mntsize;
else
warn("%s", *argv);
}
}
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);
/* NOTREACHED */
}
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);
}
static enum { IN_LIST, NOT_IN_LIST } which;
int
selected(type)
const char *type;
{
char **av;
/* If no type specified, it's always selected. */
if (typelist == NULL)
return (1);
for (av = typelist; *av != NULL; ++av)
if (!strncmp(type, *av, MFSNAMELEN))
return (which == IN_LIST ? 1 : 0);
return (which == IN_LIST ? 0 : 1);
}
void
maketypelist(fslist)
char *fslist;
{
int i;
char *nextcp, **av;
if ((fslist == NULL) || (fslist[0] == '\0'))
errx(1, "empty type list");
/*
* XXX
* Note: the syntax is "noxxx,yyy" for no xxx's and
* no yyy's, not the more intuitive "noyyy,noyyy".
*/
if (fslist[0] == 'n' && fslist[1] == 'o') {
fslist += 2;
which = NOT_IN_LIST;
} else
which = IN_LIST;
/* Count the number of types. */
for (i = 1, nextcp = fslist;
(nextcp = strchr(nextcp, ',')) != NULL; i++)
++nextcp;
/* Build an array of that many types. */
if ((av = typelist = malloc((i + 1) * sizeof(char *))) == NULL)
err(1, "can't allocate type array");
av[0] = fslist;
for (i = 1, nextcp = fslist;
(nextcp = strchr(nextcp, ',')) != NULL; i++) {
*nextcp = '\0';
av[i] = ++nextcp;
}
/* Terminate the array. */
av[i] = NULL;
}
/*
* 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)
struct statfs **mntbufp;
long mntsize;
{
int i, j;
struct statfs *mntbuf;
if (!lflag && typelist == NULL)
return (nflag ? mntsize : getmntinfo(mntbufp, MNT_WAIT));
mntbuf = *mntbufp;
j = 0;
for (i = 0; i < mntsize; i++) {
if (lflag && (mntbuf[i].f_flags & MNT_LOCAL) == 0)
continue;
if (!selected(mntbuf[i].f_fstypename))
continue;
if (nflag)
mntbuf[j] = mntbuf[i];
else
(void)statfs(mntbuf[i].f_mntonname, &mntbuf[j]);
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)
struct statfs *sfsp;
int maxwidth;
{
static long blocksize;
static int headerlen, timesthrough;
static char *header;
long used, availblks, inodes;
static char *full = "100%";
if (maxwidth < 11)
maxwidth = 11;
if (++timesthrough == 1) {
if (kflag) {
blocksize = 1024;
header = "1K-blocks";
headerlen = strlen(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;
(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(" %6s",
availblks == 0 ? full : strpct((ulong)used, (ulong)availblks, 0));
if (iflag) {
inodes = sfsp->f_files;
used = inodes - sfsp->f_ffree;
(void)printf(" %7ld %7ld %6s ", used, sfsp->f_ffree,
inodes == 0 ? full : strpct((ulong)used, (ulong)inodes, 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, sfsp)
char *file;
struct statfs *sfsp;
{
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->f_type = 0;
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 = "";
(void)memmove(&sfsp->f_mntonname[0], mntpt, MNAMELEN);
(void)memmove(&sfsp->f_mntfromname[0], file, MNAMELEN);
(void)strncpy(sfsp->f_fstypename, MOUNT_FFS, MFSNAMELEN);
(void)close(rfd);
return (0);
}
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",
(long long)off, strerror(nr > 0 ? EIO : errno));
return (0);
}
return (1);
}
void
usage()
{
(void)fprintf(stderr, "usage: df [-ikln] [-t type] [file | file_system ...]\n");
exit(1);
/* NOTREACHED */
}