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/* $OpenBSD: df.c,v 1.58 2016/03/14 14:44:03 mmcc Exp $ */ |
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/* $NetBSD: df.c,v 1.21.2.1 1995/11/01 00:06:11 jtc Exp $ */ |
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/* |
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* Copyright (c) 1980, 1990, 1993, 1994 |
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* The Regents of the University of California. All rights reserved. |
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* (c) UNIX System Laboratories, Inc. |
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* All or some portions of this file are derived from material licensed |
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* to the University of California by American Telephone and Telegraph |
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with |
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* the permission of UNIX System Laboratories, Inc. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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#include <sys/stat.h> |
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#include <sys/mount.h> |
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#include <err.h> |
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#include <errno.h> |
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#include <fcntl.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include <util.h> |
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int bread(int, off_t, void *, int); |
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static void bsdprint(struct statfs *, long, int); |
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char *getmntpt(char *); |
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static void maketypelist(char *); |
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static void posixprint(struct statfs *, long, int); |
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static void prthuman(struct statfs *sfsp, unsigned long long); |
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static void prthumanval(long long); |
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static void prtstat(struct statfs *, int, int, int); |
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static long regetmntinfo(struct statfs **, long); |
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static int selected(const char *); |
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static __dead void usage(void); |
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extern int e2fs_df(int, char *, struct statfs *); |
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extern int ffs_df(int, char *, struct statfs *); |
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static int raw_df(char *, struct statfs *); |
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int hflag, iflag, kflag, lflag, nflag, Pflag; |
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char **typelist = NULL; |
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int |
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main(int argc, char *argv[]) |
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{ |
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struct stat stbuf; |
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struct statfs *mntbuf; |
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long mntsize; |
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int ch, i; |
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int width, maxwidth; |
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char *mntpt; |
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✗✓ |
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if (pledge("stdio rpath wpath cpath", NULL) == -1) |
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err(1, "pledge"); |
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|
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✓✓ |
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while ((ch = getopt(argc, argv, "hiklnPt:")) != -1) |
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✓✗✗✗
✗✗✗✗
|
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switch (ch) { |
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case 'h': |
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hflag = 1; |
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kflag = 0; |
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break; |
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case 'i': |
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iflag = 1; |
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break; |
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case 'k': |
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kflag = 1; |
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hflag = 0; |
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break; |
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case 'l': |
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lflag = 1; |
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break; |
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case 'n': |
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nflag = 1; |
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break; |
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case 'P': |
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Pflag = 1; |
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break; |
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case 't': |
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if (typelist != NULL) |
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errx(1, "only one -t option may be specified."); |
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maketypelist(optarg); |
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break; |
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default: |
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usage(); |
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} |
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argc -= optind; |
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argv += optind; |
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✓✗✓✗
✗✓ |
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if ((iflag || hflag) && Pflag) { |
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warnx("-h and -i are incompatible with -P"); |
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usage(); |
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} |
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mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); |
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✗✓ |
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if (mntsize == 0) |
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err(1, "retrieving information on mounted file systems"); |
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✓✗ |
2 |
if (!*argv) { |
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mntsize = regetmntinfo(&mntbuf, mntsize); |
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} else { |
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mntbuf = calloc(argc, sizeof(struct statfs)); |
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if (mntbuf == NULL) |
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err(1, NULL); |
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mntsize = 0; |
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for (; *argv; argv++) { |
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if (stat(*argv, &stbuf) < 0) { |
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if ((mntpt = getmntpt(*argv)) == 0) { |
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warn("%s", *argv); |
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continue; |
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} |
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} else if (S_ISCHR(stbuf.st_mode) || S_ISBLK(stbuf.st_mode)) { |
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if (!raw_df(*argv, &mntbuf[mntsize])) |
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++mntsize; |
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continue; |
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} else |
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mntpt = *argv; |
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/* |
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* Statfs does not take a `wait' flag, so we cannot |
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* implement nflag here. |
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*/ |
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if (!statfs(mntpt, &mntbuf[mntsize])) |
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if (lflag && (mntbuf[mntsize].f_flags & MNT_LOCAL) == 0) |
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warnx("%s is not a local file system", |
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*argv); |
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else if (!selected(mntbuf[mntsize].f_fstypename)) |
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warnx("%s mounted as a %s file system", |
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*argv, mntbuf[mntsize].f_fstypename); |
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else |
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++mntsize; |
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else |
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warn("%s", *argv); |
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} |
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} |
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✓✗ |
2 |
if (mntsize) { |
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maxwidth = 11; |
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✓✓ |
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for (i = 0; i < mntsize; i++) { |
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width = strlen(mntbuf[i].f_mntfromname); |
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✗✓ |
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if (width > maxwidth) |
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maxwidth = width; |
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} |
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✗✓ |
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if (Pflag) |
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posixprint(mntbuf, mntsize, maxwidth); |
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else |
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2 |
bsdprint(mntbuf, mntsize, maxwidth); |
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} |
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return (mntsize ? 0 : 1); |
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} |
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char * |
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getmntpt(char *name) |
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{ |
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long mntsize, i; |
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struct statfs *mntbuf; |
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mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); |
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for (i = 0; i < mntsize; i++) { |
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if (!strcmp(mntbuf[i].f_mntfromname, name)) |
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return (mntbuf[i].f_mntonname); |
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} |
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return (0); |
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} |
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static enum { IN_LIST, NOT_IN_LIST } which; |
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static int |
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selected(const char *type) |
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{ |
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char **av; |
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/* If no type specified, it's always selected. */ |
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if (typelist == NULL) |
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return (1); |
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for (av = typelist; *av != NULL; ++av) |
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if (!strncmp(type, *av, MFSNAMELEN)) |
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return (which == IN_LIST ? 1 : 0); |
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return (which == IN_LIST ? 0 : 1); |
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} |
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static void |
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maketypelist(char *fslist) |
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{ |
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int i; |
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char *nextcp, **av; |
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if ((fslist == NULL) || (fslist[0] == '\0')) |
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errx(1, "empty type list"); |
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/* |
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* XXX |
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* Note: the syntax is "noxxx,yyy" for no xxx's and |
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* no yyy's, not the more intuitive "noyyy,noyyy". |
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*/ |
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if (fslist[0] == 'n' && fslist[1] == 'o') { |
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fslist += 2; |
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which = NOT_IN_LIST; |
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} else |
226 |
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which = IN_LIST; |
227 |
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|
228 |
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/* Count the number of types. */ |
229 |
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for (i = 1, nextcp = fslist; (nextcp = strchr(nextcp, ',')) != NULL; i++) |
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++nextcp; |
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232 |
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/* Build an array of that many types. */ |
233 |
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if ((av = typelist = calloc(i + 1, sizeof(char *))) == NULL) |
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err(1, NULL); |
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av[0] = fslist; |
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for (i = 1, nextcp = fslist; (nextcp = strchr(nextcp, ',')) != NULL; i++) { |
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*nextcp = '\0'; |
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av[i] = ++nextcp; |
239 |
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} |
240 |
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/* Terminate the array. */ |
241 |
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av[i] = NULL; |
242 |
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} |
243 |
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244 |
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/* |
245 |
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* Make a pass over the filesystem info in ``mntbuf'' filtering out |
246 |
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* filesystem types not in ``fsmask'' and possibly re-stating to get |
247 |
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* current (not cached) info. Returns the new count of valid statfs bufs. |
248 |
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*/ |
249 |
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static long |
250 |
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regetmntinfo(struct statfs **mntbufp, long mntsize) |
251 |
|
2 |
{ |
252 |
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int i, j; |
253 |
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struct statfs *mntbuf; |
254 |
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|
255 |
✓✗✓✗
|
2 |
if (!lflag && typelist == NULL) |
256 |
✓✗ |
2 |
return (nflag ? mntsize : getmntinfo(mntbufp, MNT_WAIT)); |
257 |
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|
258 |
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mntbuf = *mntbufp; |
259 |
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j = 0; |
260 |
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for (i = 0; i < mntsize; i++) { |
261 |
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if (lflag && (mntbuf[i].f_flags & MNT_LOCAL) == 0) |
262 |
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continue; |
263 |
|
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if (!selected(mntbuf[i].f_fstypename)) |
264 |
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continue; |
265 |
|
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if (nflag) |
266 |
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mntbuf[j] = mntbuf[i]; |
267 |
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else |
268 |
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(void)statfs(mntbuf[i].f_mntonname, &mntbuf[j]); |
269 |
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j++; |
270 |
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} |
271 |
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return (j); |
272 |
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} |
273 |
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|
274 |
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/* |
275 |
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* "human-readable" output: use 3 digits max.--put unit suffixes at |
276 |
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* the end. Makes output compact and easy-to-read esp. on huge disks. |
277 |
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* Code moved into libutil; this is now just a wrapper. |
278 |
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*/ |
279 |
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static void |
280 |
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prthumanval(long long bytes) |
281 |
|
54 |
{ |
282 |
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char ret[FMT_SCALED_STRSIZE]; |
283 |
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|
284 |
✗✓ |
54 |
if (fmt_scaled(bytes, ret) == -1) { |
285 |
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(void)printf(" %lld", bytes); |
286 |
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|
return; |
287 |
|
|
} |
288 |
|
54 |
(void)printf(" %7s", ret); |
289 |
|
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} |
290 |
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|
291 |
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static void |
292 |
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prthuman(struct statfs *sfsp, unsigned long long used) |
293 |
|
18 |
{ |
294 |
|
18 |
prthumanval(sfsp->f_blocks * sfsp->f_bsize); |
295 |
|
18 |
prthumanval(used * sfsp->f_bsize); |
296 |
|
18 |
prthumanval(sfsp->f_bavail * sfsp->f_bsize); |
297 |
|
18 |
} |
298 |
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|
299 |
|
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/* |
300 |
|
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* Convert statfs returned filesystem size into BLOCKSIZE units. |
301 |
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* Attempts to avoid overflow for large filesystems. |
302 |
|
|
*/ |
303 |
|
|
#define fsbtoblk(num, fsbs, bs) \ |
304 |
|
|
(((fsbs) != 0 && (fsbs) < (bs)) ? \ |
305 |
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(num) / ((bs) / (fsbs)) : (num) * ((fsbs) / (bs))) |
306 |
|
|
|
307 |
|
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/* |
308 |
|
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* Print out status about a filesystem. |
309 |
|
|
*/ |
310 |
|
|
static void |
311 |
|
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prtstat(struct statfs *sfsp, int maxwidth, int headerlen, int blocksize) |
312 |
|
18 |
{ |
313 |
|
|
u_int64_t used, inodes; |
314 |
|
|
int64_t availblks; |
315 |
|
|
|
316 |
|
18 |
(void)printf("%-*.*s", maxwidth, maxwidth, sfsp->f_mntfromname); |
317 |
|
18 |
used = sfsp->f_blocks - sfsp->f_bfree; |
318 |
|
18 |
availblks = sfsp->f_bavail + used; |
319 |
✓✗ |
18 |
if (hflag) |
320 |
|
18 |
prthuman(sfsp, used); |
321 |
|
|
else |
322 |
|
|
(void)printf(" %*llu %9llu %9lld", headerlen, |
323 |
|
|
fsbtoblk(sfsp->f_blocks, sfsp->f_bsize, blocksize), |
324 |
|
|
fsbtoblk(used, sfsp->f_bsize, blocksize), |
325 |
|
|
fsbtoblk(sfsp->f_bavail, sfsp->f_bsize, blocksize)); |
326 |
✓✗ |
18 |
(void)printf(" %5.0f%%", |
327 |
|
|
availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0); |
328 |
✗✓ |
18 |
if (iflag) { |
329 |
|
|
inodes = sfsp->f_files; |
330 |
|
|
used = inodes - sfsp->f_ffree; |
331 |
|
|
(void)printf(" %7llu %7llu %5.0f%% ", used, sfsp->f_ffree, |
332 |
|
|
inodes == 0 ? 100.0 : (double)used / (double)inodes * 100.0); |
333 |
|
|
} else |
334 |
|
18 |
(void)printf(" "); |
335 |
|
18 |
(void)printf(" %s\n", sfsp->f_mntonname); |
336 |
|
18 |
} |
337 |
|
|
|
338 |
|
|
/* |
339 |
|
|
* Print in traditional BSD format. |
340 |
|
|
*/ |
341 |
|
|
static void |
342 |
|
|
bsdprint(struct statfs *mntbuf, long mntsize, int maxwidth) |
343 |
|
2 |
{ |
344 |
|
|
int i; |
345 |
|
|
char *header; |
346 |
|
|
int headerlen; |
347 |
|
|
long blocksize; |
348 |
|
|
|
349 |
|
|
/* Print the header line */ |
350 |
✓✗ |
2 |
if (hflag) { |
351 |
|
2 |
header = " Size"; |
352 |
|
2 |
headerlen = strlen(header); |
353 |
|
2 |
(void)printf("%-*.*s %s Used Avail Capacity", |
354 |
|
|
maxwidth, maxwidth, "Filesystem", header); |
355 |
|
|
} else { |
356 |
|
|
if (kflag) { |
357 |
|
|
blocksize = 1024; |
358 |
|
|
header = "1K-blocks"; |
359 |
|
|
headerlen = strlen(header); |
360 |
|
|
} else |
361 |
|
|
header = getbsize(&headerlen, &blocksize); |
362 |
|
|
(void)printf("%-*.*s %s Used Avail Capacity", |
363 |
|
|
maxwidth, maxwidth, "Filesystem", header); |
364 |
|
|
} |
365 |
✗✓ |
2 |
if (iflag) |
366 |
|
|
(void)printf(" iused ifree %%iused"); |
367 |
|
2 |
(void)printf(" Mounted on\n"); |
368 |
|
|
|
369 |
|
|
|
370 |
✓✓ |
20 |
for (i = 0; i < mntsize; i++) |
371 |
|
18 |
prtstat(&mntbuf[i], maxwidth, headerlen, blocksize); |
372 |
|
|
return; |
373 |
|
|
} |
374 |
|
|
|
375 |
|
|
/* |
376 |
|
|
* Print in format defined by POSIX 1002.2, invoke with -P option. |
377 |
|
|
*/ |
378 |
|
|
static void |
379 |
|
|
posixprint(struct statfs *mntbuf, long mntsize, int maxwidth) |
380 |
|
|
{ |
381 |
|
|
int i; |
382 |
|
|
int blocksize; |
383 |
|
|
char *blockstr; |
384 |
|
|
struct statfs *sfsp; |
385 |
|
|
long long used, avail; |
386 |
|
|
double percentused; |
387 |
|
|
|
388 |
|
|
if (kflag) { |
389 |
|
|
blocksize = 1024; |
390 |
|
|
blockstr = "1024-blocks"; |
391 |
|
|
} else { |
392 |
|
|
blocksize = 512; |
393 |
|
|
blockstr = " 512-blocks"; |
394 |
|
|
} |
395 |
|
|
|
396 |
|
|
(void)printf( |
397 |
|
|
"%-*.*s %s Used Available Capacity Mounted on\n", |
398 |
|
|
maxwidth, maxwidth, "Filesystem", blockstr); |
399 |
|
|
|
400 |
|
|
for (i = 0; i < mntsize; i++) { |
401 |
|
|
sfsp = &mntbuf[i]; |
402 |
|
|
used = sfsp->f_blocks - sfsp->f_bfree; |
403 |
|
|
avail = sfsp->f_bavail + used; |
404 |
|
|
if (avail == 0) |
405 |
|
|
percentused = 100.0; |
406 |
|
|
else |
407 |
|
|
percentused = (double)used / (double)avail * 100.0; |
408 |
|
|
|
409 |
|
|
(void) printf ("%-*.*s %*lld %10lld %11lld %5.0f%% %s\n", |
410 |
|
|
maxwidth, maxwidth, sfsp->f_mntfromname, |
411 |
|
|
(int)strlen(blockstr), |
412 |
|
|
fsbtoblk(sfsp->f_blocks, sfsp->f_bsize, blocksize), |
413 |
|
|
fsbtoblk(used, sfsp->f_bsize, blocksize), |
414 |
|
|
fsbtoblk(sfsp->f_bavail, sfsp->f_bsize, blocksize), |
415 |
|
|
percentused, sfsp->f_mntonname); |
416 |
|
|
} |
417 |
|
|
} |
418 |
|
|
|
419 |
|
|
static int |
420 |
|
|
raw_df(char *file, struct statfs *sfsp) |
421 |
|
|
{ |
422 |
|
|
int rfd, ret = -1; |
423 |
|
|
|
424 |
|
|
if ((rfd = open(file, O_RDONLY)) < 0) { |
425 |
|
|
warn("%s", file); |
426 |
|
|
return (-1); |
427 |
|
|
} |
428 |
|
|
|
429 |
|
|
if (ffs_df(rfd, file, sfsp) == 0) { |
430 |
|
|
ret = 0; |
431 |
|
|
} else if (e2fs_df(rfd, file, sfsp) == 0) { |
432 |
|
|
ret = 0; |
433 |
|
|
} |
434 |
|
|
|
435 |
|
|
close (rfd); |
436 |
|
|
return (ret); |
437 |
|
|
} |
438 |
|
|
|
439 |
|
|
int |
440 |
|
|
bread(int rfd, off_t off, void *buf, int cnt) |
441 |
|
|
{ |
442 |
|
|
int nr; |
443 |
|
|
|
444 |
|
|
if ((nr = pread(rfd, buf, cnt, off)) != cnt) { |
445 |
|
|
/* Probably a dismounted disk if errno == EIO. */ |
446 |
|
|
if (errno != EIO) |
447 |
|
|
(void)fprintf(stderr, "\ndf: %qd: %s\n", |
448 |
|
|
off, strerror(nr > 0 ? EIO : errno)); |
449 |
|
|
return (0); |
450 |
|
|
} |
451 |
|
|
return (1); |
452 |
|
|
} |
453 |
|
|
|
454 |
|
|
static __dead void |
455 |
|
|
usage(void) |
456 |
|
|
{ |
457 |
|
|
(void)fprintf(stderr, |
458 |
|
|
"usage: %s [-hiklnP] [-t type] [[file | file_system] ...]\n", |
459 |
|
|
getprogname()); |
460 |
|
|
exit(1); |
461 |
|
|
} |