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- /*
- * Copyright (c) 1980, 1990 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
- char copyright[] =
- "@(#) Copyright (c) 1980, 1990 The Regents of the University of California.\n\
- All rights reserved.\n";
- #endif /* not lint */
-
- #ifndef lint
- static char sccsid[] = "@(#)df.c 5.24 (Berkeley) 3/6/91";
- #endif /* not lint */
-
- /*
- * df
- */
- #include <sys/param.h>
- #include <sys/stat.h>
- #include <sys/mount.h>
- #include <fcntl.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
-
- char *getmntpt();
- void ufs_df(), prtstat();
- int iflag, kflag, nflag;
- struct ufs_args mdev;
-
- int
- main(argc, argv)
- int argc;
- char **argv;
- {
- extern int errno, optind;
- int err, ch, i;
- long width, maxwidth, mntsize;
- char *mntpt, *mktemp();
- struct stat stbuf;
- struct statfs statfsbuf, *mntbuf;
-
- while ((ch = getopt(argc, argv, "ikn")) != EOF)
- switch(ch) {
- case 'i':
- iflag = 1;
- break;
- case 'k':
- kflag = 1;
- break;
- case 'n':
- nflag = 1;
- break;
- case '?':
- default:
- fprintf(stderr,
- "usage: df [-ikn] [file | file_system ...]\n");
- exit(1);
- }
- 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) {
- mntsize = getmntinfo(&mntbuf, (nflag ? MNT_NOWAIT : MNT_WAIT));
- 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) {
- fprintf(stderr, "df: %s: %s\n", *argv,
- strerror(err));
- 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) {
- fprintf(stderr, "df: %s: %s\n",
- mntpt, strerror(errno));
- 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
- fprintf(stderr, "df: %s: %s\n",
- *argv, strerror(errno));
- (void)unmount(mntpt, MNT_NOFORCE);
- (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) {
- fprintf(stderr,
- "df: %s: %s\n", mntpt, strerror(errno));
- 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, (nflag ? MNT_NOWAIT : MNT_WAIT));
- for (i = 0; i < mntsize; i++) {
- if (!strcmp(mntbuf[i].f_mntfromname, name))
- return (mntbuf[i].f_mntonname);
- }
- return (0);
- }
-
- /*
- * Print out status about a filesystem.
- */
- void
- prtstat(sfsp, maxwidth)
- register struct statfs *sfsp;
- long maxwidth;
- {
- long used, availblks, inodes;
- static int timesthrough;
-
- if (maxwidth < 11)
- maxwidth = 11;
- if (++timesthrough == 1) {
- printf("%-*.*s%s used avail capacity",
- maxwidth, maxwidth, "Filesystem",
- kflag ? " kbytes" : "512-blks");
- if (iflag)
- printf(" iused ifree %%iused");
- printf(" Mounted on\n");
- }
- printf("%-*.*s", maxwidth, maxwidth, sfsp->f_mntfromname);
- used = sfsp->f_blocks - sfsp->f_bfree;
- availblks = sfsp->f_bavail + used;
- printf("%8ld%8ld%8ld",
- sfsp->f_blocks * sfsp->f_fsize / (kflag ? 1024 : 512),
- used * sfsp->f_fsize / (kflag ? 1024 : 512),
- sfsp->f_bavail * sfsp->f_fsize / (kflag ? 1024 : 512));
- printf("%6.0f%%",
- availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
- if (iflag) {
- inodes = sfsp->f_files;
- used = inodes - sfsp->f_ffree;
- printf("%8ld%8ld%6.0f%% ", used, sfsp->f_ffree,
- inodes == 0 ? 100.0 : (double)used / (double)inodes * 100.0);
- } else
- printf(" ");
- printf(" %s\n", sfsp->f_mntonname);
- }
-
- /*
- * This code constitutes the old df code for extracting
- * information from filesystem superblocks.
- */
- #include <ufs/fs.h>
- #include <errno.h>
- #include <fstab.h>
-
- union {
- struct fs iu_fs;
- char dummy[SBSIZE];
- } sb;
- #define sblock sb.iu_fs
-
- int fi;
- int bread();
-
- void
- ufs_df(file, maxwidth)
- char *file;
- long maxwidth;
- {
- extern int errno;
- struct statfs statfsbuf;
- register struct statfs *sfsp;
- char *mntpt;
- static int synced;
-
- if (synced++ == 0)
- sync();
-
- if ((fi = open(file, O_RDONLY)) < 0) {
- fprintf(stderr, "df: %s: %s\n", file, strerror(errno));
- return;
- }
- if (bread((long)SBOFF, (char *)&sblock, SBSIZE) == 0) {
- (void) close(fi);
- return;
- }
- sfsp = &statfsbuf;
- sfsp->f_type = MOUNT_UFS;
- sfsp->f_flags = 0;
- sfsp->f_fsize = sblock.fs_fsize;
- sfsp->f_bsize = 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 = "";
- bcopy((caddr_t)mntpt, (caddr_t)&sfsp->f_mntonname[0], MNAMELEN);
- bcopy((caddr_t)file, (caddr_t)&sfsp->f_mntfromname[0], MNAMELEN);
- prtstat(sfsp, maxwidth);
- (void) close(fi);
- }
-
- long lseek();
-
- int
- bread(off, buf, cnt)
- long off;
- char *buf;
- int cnt;
- {
- int n;
- extern errno;
-
- (void) lseek(fi, off, SEEK_SET);
- if ((n=read(fi, buf, cnt)) != cnt) {
- /* probably a dismounted disk if errno == EIO */
- if (errno != EIO) {
- printf("\nread error off = %ld\n", off);
- printf("count = %d; errno = %d\n", n, errno);
- }
- return (0);
- }
- return (1);
- }
-