2966d28c32
setenv(3) by tracking the size of the memory allocated instead of using strlen() on the current value. Convert all calls to POSIX from historic BSD API: - unsetenv returns an int. - putenv takes a char * instead of const char *. - putenv no longer makes a copy of the input string. - errno is set appropriately for POSIX. Exceptions involve bad environ variable and internal initialization code. These both set errno to EFAULT. Several patches to base utilities to handle the POSIX changes from Andrey Chernov's previous commit. A few I re-wrote to use setenv() instead of putenv(). New regression module for tools/regression/environ to test these functions. It also can be used to test the performance. Bump __FreeBSD_version to 700050 due to API change. PR: kern/99826 Approved by: wes Approved by: re (kensmith)
578 lines
14 KiB
C
578 lines
14 KiB
C
/*-
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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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* 4. 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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#if 0
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1980, 1990, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)df.c 8.9 (Berkeley) 5/8/95";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/mount.h>
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#include <sys/sysctl.h>
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#include <ufs/ufs/ufsmount.h>
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#include <err.h>
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#include <libutil.h>
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#include <stdint.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 <sysexits.h>
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#include <unistd.h>
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#include "extern.h"
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#define UNITS_SI 1
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#define UNITS_2 2
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/* Maximum widths of various fields. */
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struct maxwidths {
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int mntfrom;
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int total;
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int used;
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int avail;
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int iused;
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int ifree;
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};
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static void addstat(struct statfs *, struct statfs *);
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static char *getmntpt(const char *);
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static int int64width(int64_t);
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static char *makenetvfslist(void);
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static void prthuman(const struct statfs *, int64_t);
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static void prthumanval(int64_t);
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static intmax_t fsbtoblk(int64_t, uint64_t, u_long);
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static void prtstat(struct statfs *, struct maxwidths *);
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static size_t regetmntinfo(struct statfs **, long, const char **);
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static void update_maxwidths(struct maxwidths *, const struct statfs *);
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static void usage(void);
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static __inline int
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imax(int a, int b)
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{
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return (a > b ? a : b);
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}
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static int aflag = 0, cflag, hflag, iflag, kflag, lflag = 0, nflag;
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static struct ufs_args mdev;
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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 statfsbuf, totalbuf;
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struct maxwidths maxwidths;
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struct statfs *mntbuf;
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const char *fstype;
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char *mntpath, *mntpt;
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const char **vfslist;
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size_t i, mntsize;
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int ch, rv;
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fstype = "ufs";
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memset(&totalbuf, 0, sizeof(totalbuf));
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totalbuf.f_bsize = DEV_BSIZE;
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strlcpy(totalbuf.f_mntfromname, "total", MNAMELEN);
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vfslist = NULL;
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while ((ch = getopt(argc, argv, "abcgHhiklmnPt:")) != -1)
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switch (ch) {
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case 'a':
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aflag = 1;
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break;
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case 'b':
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/* FALLTHROUGH */
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case 'P':
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/*
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* POSIX specifically discusses the the behavior of
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* both -k and -P. It states that the blocksize should
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* be set to 1024. Thus, if this occurs, simply break
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* rather than clobbering the old blocksize.
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*/
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if (kflag)
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break;
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setenv("BLOCKSIZE", "512", 1);
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hflag = 0;
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break;
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case 'c':
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cflag = 1;
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break;
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case 'g':
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setenv("BLOCKSIZE", "1g", 1);
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hflag = 0;
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break;
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case 'H':
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hflag = UNITS_SI;
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break;
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case 'h':
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hflag = UNITS_2;
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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++;
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setenv("BLOCKSIZE", "1024", 1);
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hflag = 0;
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break;
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case 'l':
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if (vfslist != NULL)
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errx(1, "-l and -t are mutually exclusive.");
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vfslist = makevfslist(makenetvfslist());
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lflag = 1;
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break;
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case 'm':
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setenv("BLOCKSIZE", "1m", 1);
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hflag = 0;
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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 't':
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if (lflag)
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errx(1, "-l and -t are mutually exclusive.");
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if (vfslist != NULL)
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errx(1, "only one -t option may be specified");
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fstype = optarg;
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vfslist = makevfslist(optarg);
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break;
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case '?':
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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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mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
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bzero(&maxwidths, sizeof(maxwidths));
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for (i = 0; i < mntsize; i++)
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update_maxwidths(&maxwidths, &mntbuf[i]);
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rv = 0;
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if (!*argv) {
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mntsize = regetmntinfo(&mntbuf, mntsize, vfslist);
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bzero(&maxwidths, sizeof(maxwidths));
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for (i = 0; i < mntsize; i++) {
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if (cflag)
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addstat(&totalbuf, &mntbuf[i]);
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update_maxwidths(&maxwidths, &mntbuf[i]);
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}
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if (cflag)
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update_maxwidths(&maxwidths, &totalbuf);
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for (i = 0; i < mntsize; i++)
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if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0)
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prtstat(&mntbuf[i], &maxwidths);
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if (cflag)
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prtstat(&totalbuf, &maxwidths);
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exit(rv);
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}
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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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rv = 1;
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continue;
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}
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} else if (S_ISCHR(stbuf.st_mode)) {
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if ((mntpt = getmntpt(*argv)) == 0) {
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mdev.fspec = *argv;
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mntpath = strdup("/tmp/df.XXXXXX");
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if (mntpath == NULL) {
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warn("strdup failed");
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rv = 1;
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continue;
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}
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mntpt = mkdtemp(mntpath);
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if (mntpt == NULL) {
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warn("mkdtemp(\"%s\") failed", mntpath);
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rv = 1;
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free(mntpath);
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continue;
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}
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if (mount(fstype, mntpt, MNT_RDONLY,
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&mdev) != 0) {
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warn("%s", *argv);
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rv = 1;
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(void)rmdir(mntpt);
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free(mntpath);
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continue;
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} else if (statfs(mntpt, &statfsbuf) == 0) {
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statfsbuf.f_mntonname[0] = '\0';
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prtstat(&statfsbuf, &maxwidths);
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if (cflag)
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addstat(&totalbuf, &statfsbuf);
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} else {
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warn("%s", *argv);
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rv = 1;
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}
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(void)unmount(mntpt, 0);
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(void)rmdir(mntpt);
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free(mntpath);
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continue;
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}
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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, &statfsbuf) < 0) {
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warn("%s", mntpt);
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rv = 1;
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continue;
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}
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/*
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* Check to make sure the arguments we've been given are
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* satisfied. Return an error if we have been asked to
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* list a mount point that does not match the other args
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* we've been given (-l, -t, etc.).
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*/
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if (checkvfsname(statfsbuf.f_fstypename, vfslist)) {
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rv = 1;
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continue;
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}
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if (argc == 1) {
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bzero(&maxwidths, sizeof(maxwidths));
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update_maxwidths(&maxwidths, &statfsbuf);
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}
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prtstat(&statfsbuf, &maxwidths);
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if (cflag)
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addstat(&totalbuf, &statfsbuf);
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}
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if (cflag)
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prtstat(&totalbuf, &maxwidths);
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return (rv);
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}
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static char *
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getmntpt(const char *name)
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{
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size_t 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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/*
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* Make a pass over the file system info in ``mntbuf'' filtering out
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* file system types not in vfslist and possibly re-stating to get
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* current (not cached) info. Returns the new count of valid statfs bufs.
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*/
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static size_t
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regetmntinfo(struct statfs **mntbufp, long mntsize, const char **vfslist)
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{
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int error, i, j;
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struct statfs *mntbuf;
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if (vfslist == NULL)
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return (nflag ? mntsize : getmntinfo(mntbufp, MNT_WAIT));
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mntbuf = *mntbufp;
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for (j = 0, i = 0; i < mntsize; i++) {
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if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
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continue;
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/*
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* XXX statfs(2) can fail for various reasons. It may be
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* possible that the user does not have access to the
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* pathname, if this happens, we will fall back on
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* "stale" filesystem statistics.
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*/
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error = statfs(mntbuf[i].f_mntonname, &mntbuf[j]);
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if (nflag || error < 0)
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if (i != j) {
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if (error < 0)
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warnx("%s stats possibly stale",
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mntbuf[i].f_mntonname);
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mntbuf[j] = mntbuf[i];
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}
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j++;
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}
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return (j);
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}
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static void
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prthuman(const struct statfs *sfsp, int64_t used)
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{
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prthumanval(sfsp->f_blocks * sfsp->f_bsize);
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prthumanval(used * sfsp->f_bsize);
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prthumanval(sfsp->f_bavail * sfsp->f_bsize);
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}
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static void
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prthumanval(int64_t bytes)
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{
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char buf[6];
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int flags;
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flags = HN_B | HN_NOSPACE | HN_DECIMAL;
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if (hflag == UNITS_SI)
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flags |= HN_DIVISOR_1000;
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humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1),
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bytes, "", HN_AUTOSCALE, flags);
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(void)printf(" %6s", buf);
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}
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/*
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* Convert statfs returned file system size into BLOCKSIZE units.
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* Attempts to avoid overflow for large file systems.
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*/
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static intmax_t
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fsbtoblk(int64_t num, uint64_t fsbs, u_long bs)
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{
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if (fsbs != 0 && fsbs < bs)
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return (num / (intmax_t)(bs / fsbs));
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else
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return (num * (intmax_t)(fsbs / bs));
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}
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/*
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* Print out status about a file system.
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*/
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static void
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prtstat(struct statfs *sfsp, struct maxwidths *mwp)
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{
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static long blocksize;
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static int headerlen, timesthrough = 0;
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static const char *header;
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int64_t used, availblks, inodes;
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if (++timesthrough == 1) {
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mwp->mntfrom = imax(mwp->mntfrom, (int)strlen("Filesystem"));
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if (hflag) {
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header = " Size";
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mwp->total = mwp->used = mwp->avail =
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(int)strlen(header);
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} else {
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header = getbsize(&headerlen, &blocksize);
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mwp->total = imax(mwp->total, headerlen);
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}
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mwp->used = imax(mwp->used, (int)strlen("Used"));
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mwp->avail = imax(mwp->avail, (int)strlen("Avail"));
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(void)printf("%-*s %-*s %*s %*s Capacity",
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mwp->mntfrom, "Filesystem", mwp->total, header,
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mwp->used, "Used", mwp->avail, "Avail");
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if (iflag) {
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mwp->iused = imax(mwp->iused, (int)strlen(" iused"));
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mwp->ifree = imax(mwp->ifree, (int)strlen("ifree"));
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(void)printf(" %*s %*s %%iused",
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mwp->iused - 2, "iused", mwp->ifree, "ifree");
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}
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(void)printf(" Mounted on\n");
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}
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(void)printf("%-*s", mwp->mntfrom, sfsp->f_mntfromname);
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used = sfsp->f_blocks - sfsp->f_bfree;
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availblks = sfsp->f_bavail + used;
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if (hflag) {
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prthuman(sfsp, used);
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} else {
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(void)printf(" %*jd %*jd %*jd",
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mwp->total, fsbtoblk(sfsp->f_blocks,
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sfsp->f_bsize, blocksize),
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mwp->used, fsbtoblk(used, sfsp->f_bsize, blocksize),
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mwp->avail, fsbtoblk(sfsp->f_bavail,
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sfsp->f_bsize, blocksize));
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}
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(void)printf(" %5.0f%%",
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availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
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if (iflag) {
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inodes = sfsp->f_files;
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used = inodes - sfsp->f_ffree;
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(void)printf(" %*jd %*jd %4.0f%% ", mwp->iused, (intmax_t)used,
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mwp->ifree, (intmax_t)sfsp->f_ffree, inodes == 0 ? 100.0 :
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(double)used / (double)inodes * 100.0);
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} else
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(void)printf(" ");
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if (strncmp(sfsp->f_mntfromname, "total", MNAMELEN) != 0)
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(void)printf(" %s", sfsp->f_mntonname);
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(void)printf("\n");
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}
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void
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addstat(struct statfs *totalfsp, struct statfs *statfsp)
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{
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uint64_t bsize;
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bsize = statfsp->f_bsize / totalfsp->f_bsize;
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totalfsp->f_blocks += statfsp->f_blocks * bsize;
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totalfsp->f_bfree += statfsp->f_bfree * bsize;
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totalfsp->f_bavail += statfsp->f_bavail * bsize;
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totalfsp->f_files += statfsp->f_files;
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totalfsp->f_ffree += statfsp->f_ffree;
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}
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/*
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* Update the maximum field-width information in `mwp' based on
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* the file system specified by `sfsp'.
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*/
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static void
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update_maxwidths(struct maxwidths *mwp, const struct statfs *sfsp)
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{
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static long blocksize = 0;
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int dummy;
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if (blocksize == 0)
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getbsize(&dummy, &blocksize);
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mwp->mntfrom = imax(mwp->mntfrom, (int)strlen(sfsp->f_mntfromname));
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mwp->total = imax(mwp->total, int64width(
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fsbtoblk((int64_t)sfsp->f_blocks, sfsp->f_bsize, blocksize)));
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mwp->used = imax(mwp->used,
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int64width(fsbtoblk((int64_t)sfsp->f_blocks -
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(int64_t)sfsp->f_bfree, sfsp->f_bsize, blocksize)));
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mwp->avail = imax(mwp->avail, int64width(fsbtoblk(sfsp->f_bavail,
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sfsp->f_bsize, blocksize)));
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mwp->iused = imax(mwp->iused, int64width((int64_t)sfsp->f_files -
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sfsp->f_ffree));
|
|
mwp->ifree = imax(mwp->ifree, int64width(sfsp->f_ffree));
|
|
}
|
|
|
|
/* Return the width in characters of the specified value. */
|
|
static int
|
|
int64width(int64_t val)
|
|
{
|
|
int len;
|
|
|
|
len = 0;
|
|
/* Negative or zero values require one extra digit. */
|
|
if (val <= 0) {
|
|
val = -val;
|
|
len++;
|
|
}
|
|
while (val > 0) {
|
|
len++;
|
|
val /= 10;
|
|
}
|
|
|
|
return (len);
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
|
|
(void)fprintf(stderr,
|
|
"usage: df [-b | -g | -H | -h | -k | -m | -P] [-aciln] [-t type] [file | filesystem ...]\n");
|
|
exit(EX_USAGE);
|
|
}
|
|
|
|
static char *
|
|
makenetvfslist(void)
|
|
{
|
|
char *str, *strptr, **listptr;
|
|
struct xvfsconf *xvfsp, *keep_xvfsp;
|
|
size_t buflen;
|
|
int cnt, i, maxvfsconf;
|
|
|
|
if (sysctlbyname("vfs.conflist", NULL, &buflen, NULL, 0) < 0) {
|
|
warn("sysctl(vfs.conflist)");
|
|
return (NULL);
|
|
}
|
|
xvfsp = malloc(buflen);
|
|
if (xvfsp == NULL) {
|
|
warnx("malloc failed");
|
|
return (NULL);
|
|
}
|
|
keep_xvfsp = xvfsp;
|
|
if (sysctlbyname("vfs.conflist", xvfsp, &buflen, NULL, 0) < 0) {
|
|
warn("sysctl(vfs.conflist)");
|
|
free(keep_xvfsp);
|
|
return (NULL);
|
|
}
|
|
maxvfsconf = buflen / sizeof(struct xvfsconf);
|
|
|
|
if ((listptr = malloc(sizeof(char*) * maxvfsconf)) == NULL) {
|
|
warnx("malloc failed");
|
|
free(keep_xvfsp);
|
|
return (NULL);
|
|
}
|
|
|
|
for (cnt = 0, i = 0; i < maxvfsconf; i++) {
|
|
if (xvfsp->vfc_flags & VFCF_NETWORK) {
|
|
listptr[cnt++] = strdup(xvfsp->vfc_name);
|
|
if (listptr[cnt-1] == NULL) {
|
|
warnx("malloc failed");
|
|
free(listptr);
|
|
free(keep_xvfsp);
|
|
return (NULL);
|
|
}
|
|
}
|
|
xvfsp++;
|
|
}
|
|
|
|
if (cnt == 0 ||
|
|
(str = malloc(sizeof(char) * (32 * cnt + cnt + 2))) == NULL) {
|
|
if (cnt > 0)
|
|
warnx("malloc failed");
|
|
free(listptr);
|
|
free(keep_xvfsp);
|
|
return (NULL);
|
|
}
|
|
|
|
*str = 'n'; *(str + 1) = 'o';
|
|
for (i = 0, strptr = str + 2; i < cnt; i++, strptr++) {
|
|
strlcpy(strptr, listptr[i], 32);
|
|
strptr += strlen(listptr[i]);
|
|
*strptr = ',';
|
|
free(listptr[i]);
|
|
}
|
|
*(--strptr) = '\0';
|
|
|
|
free(keep_xvfsp);
|
|
free(listptr);
|
|
return (str);
|
|
}
|