freebsd-dev/bin/df/df.c
Peter Wemm dd4cdf587c Cleaning out old stuff from one of my source trees:
use mkdtemp() rather than mktemp() and fix a trivial memory leak.
1998-12-16 05:29:09 +00:00

383 lines
9.7 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[] =
"$Id: df.c,v 1.19 1997/10/13 09:36:05 joerg 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>
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 prtstat __P((struct statfs *, int));
int ufs_df __P((char *, int));
void usage __P((void));
int iflag, nflag;
struct ufs_args mdev;
int
main(argc, argv)
int argc;
char *argv[];
{
struct stat stbuf;
struct statfs statfsbuf, *mntbuf;
long mntsize;
int ch, err, i, maxwidth, rv, width;
char *mntpt, *mntpath, **vfslist;
vfslist = NULL;
while ((ch = getopt(argc, argv, "iknt:")) != -1)
switch (ch) {
case 'i':
iflag = 1;
break;
case 'k':
putenv("BLOCKSIZE=1k");
break;
case 'n':
nflag = 1;
break;
case 't':
if (vfslist != NULL)
errx(1, "only one -t option may be specified.");
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++)
prtstat(&mntbuf[i], maxwidth);
exit(rv);
}
for (; *argv; argv++) {
if (stat(*argv, &stbuf) < 0) {
err = errno;
if ((mntpt = getmntpt(*argv)) == 0) {
warn("%s", *argv);
rv = 1;
continue;
}
} else if ((stbuf.st_mode & S_IFMT) == S_IFCHR) {
rv = ufs_df(*argv, maxwidth) || rv;
continue;
} else if ((stbuf.st_mode & S_IFMT) == S_IFBLK) {
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("ufs", 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);
}
/*
* 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;
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/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;
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, MNAMELEN);
memmove(&sfsp->f_mntfromname[0], file, MNAMELEN);
prtstat(sfsp, maxwidth);
(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",
off, strerror(nr > 0 ? EIO : errno));
return (0);
}
return (1);
}
void
usage()
{
(void)fprintf(stderr,
"usage: df [-ikn] [-t type] [file | filesystem ...]\n");
exit(1);
}