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+/*
+ * 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 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
+static char sccsid[] = "@(#)df.c 8.7 (Berkeley) 4/2/94";
+#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_LOCAL \
+ (MT(MOUNT_UFS)|MT(MOUNT_MFS)|MT(MOUNT_LFS)|MT(MOUNT_MSDOS)|MT(MOUNT_CD9660))
+#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),
+ "mfs", MT(MOUNT_MFS),
+ "lfs", MT(MOUNT_LFS),
+ "msdos", MT(MOUNT_MSDOS),
+ "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),
+ "procfs", MT(MOUNT_PROCFS),
+ "afs", MT(MOUNT_AFS),
+ "iso9660fs", MT(MOUNT_CD9660),
+ "cdfs", MT(MOUNT_CD9660),
+ "misc", MT(MOUNT_LOFS)|MT(MOUNT_FDESC)|MT(MOUNT_PORTAL)|
+ MT(MOUNT_KERNFS)|MT(MOUNT_PROCFS),
+ NULL, 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 fsmask, mntsize;
+ int ch, err, i, maxwidth, width;
+ char *mntpt;
+
+ 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));
+ errx(1, "unknown type `%s'", str);
+}
+
+/*
+ * 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;
+{
+ int i, j;
+ 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)
+ 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;
+ 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);
+}
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