Remove some unnecessary inclusions of <sys/cdefs.h> across the tree.
[dragonfly.git] / bin / df / df.c
CommitLineData
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1/*
2 * Copyright (c) 1980, 1990, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
1de703da
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37 *
38 * @(#) Copyright (c) 1980, 1990, 1993, 1994 The Regents of the University of California. All rights reserved.
39 * @(#)df.c 8.9 (Berkeley) 5/8/95
40 * $FreeBSD: src/bin/df/df.c,v 1.23.2.9 2002/07/01 00:14:24 iedowse Exp $
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41 */
42
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43#include <sys/param.h>
44#include <sys/stat.h>
45#include <sys/mount.h>
46#include <sys/sysctl.h>
799e4f0b 47#include <sys/statvfs.h>
67ad9090
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48
49#include <vfs/ufs/dinode.h>
38a690d7 50#include <vfs/ufs/fs.h>
67ad9090 51#include <vfs/ufs/ufsmount.h>
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52
53#include <err.h>
54#include <errno.h>
55#include <fcntl.h>
56#include <fstab.h>
da3084db 57#include <libutil.h>
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58#include <stdio.h>
59#include <stdlib.h>
60#include <string.h>
61#include <sysexits.h>
62#include <unistd.h>
63
64#define UNITS_SI 1
65#define UNITS_2 2
66
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67/* Maximum widths of various fields. */
68struct maxwidths {
69 int mntfrom;
70 int total;
71 int used;
72 int avail;
73 int iused;
74 int ifree;
75};
76
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77int bread(off_t, void *, int);
78int checkvfsname(const char *, char **);
79char *getmntpt(char *);
799e4f0b 80int quadwidth(int64_t);
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81char *makenetvfslist(void);
82char **makevfslist(char *);
4b378413 83void prthuman(struct statvfs *, int64_t);
da3084db 84void prthumanval(int64_t);
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MD
85void prtstat(struct statfs *, struct statvfs *, struct maxwidths *);
86long regetmntinfo(struct statfs **, struct statvfs **, long, char **);
984263bc 87int ufs_df(char *, struct maxwidths *);
799e4f0b 88void update_maxwidths(struct maxwidths *, struct statfs *, struct statvfs *);
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89void usage(void);
90
91int aflag = 0, hflag, iflag, nflag;
92struct ufs_args mdev;
93
1f0f7b35
SW
94static __inline int
95imax(int a, int b)
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96{
97 return (a > b ? a : b);
98}
99
799e4f0b
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100static __inline int64_t
101qmax(int64_t a, int64_t b)
102{
103 return (a > b ? a : b);
104}
105
984263bc 106int
b5744197 107main(int argc, char **argv)
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108{
109 struct stat stbuf;
110 struct statfs statfsbuf, *mntbuf;
799e4f0b 111 struct statvfs statvfsbuf, *mntvbuf;
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112 struct maxwidths maxwidths;
113 const char *fstype;
114 char *mntpath, *mntpt, **vfslist;
115 long mntsize;
116 int ch, i, rv;
117
118 fstype = "ufs";
119
120 vfslist = NULL;
121 while ((ch = getopt(argc, argv, "abgHhiklmnPt:")) != -1)
122 switch (ch) {
123 case 'a':
124 aflag = 1;
125 break;
126 case 'b':
127 /* FALLTHROUGH */
128 case 'P':
5d0641a4
PA
129 if (setenv("BLOCKSIZE", "512", 1) != 0)
130 warn("setenv: cannot set BLOCKSIZE=512");
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131 hflag = 0;
132 break;
133 case 'g':
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PA
134 if (setenv("BLOCKSIZE", "1g", 1) != 0)
135 warn("setenv: cannot set BLOCKSIZE=1g");
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136 hflag = 0;
137 break;
138 case 'H':
139 hflag = UNITS_SI;
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140 break;
141 case 'h':
142 hflag = UNITS_2;
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143 break;
144 case 'i':
145 iflag = 1;
146 break;
147 case 'k':
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PA
148 if (setenv("BLOCKSIZE", "1k", 1) != 0)
149 warn("setenv: cannot set BLOCKSIZE=1k");
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150 hflag = 0;
151 break;
152 case 'l':
153 if (vfslist != NULL)
154 errx(1, "-l and -t are mutually exclusive.");
155 vfslist = makevfslist(makenetvfslist());
156 break;
157 case 'm':
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PA
158 if (setenv("BLOCKSIZE", "1m", 1) != 0)
159 warn("setenv: cannot set BLOCKSIZE=1m");
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160 hflag = 0;
161 break;
162 case 'n':
163 nflag = 1;
164 break;
165 case 't':
166 if (vfslist != NULL)
167 errx(1, "only one -t option may be specified");
168 fstype = optarg;
169 vfslist = makevfslist(optarg);
170 break;
171 case '?':
172 default:
173 usage();
174 }
175 argc -= optind;
176 argv += optind;
177
799e4f0b 178 mntsize = getmntvinfo(&mntbuf, &mntvbuf, MNT_NOWAIT);
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179 bzero(&maxwidths, sizeof(maxwidths));
180 for (i = 0; i < mntsize; i++)
799e4f0b 181 update_maxwidths(&maxwidths, &mntbuf[i], &mntvbuf[i]);
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182
183 rv = 0;
184 if (!*argv) {
799e4f0b 185 mntsize = regetmntinfo(&mntbuf, &mntvbuf, mntsize, vfslist);
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186 bzero(&maxwidths, sizeof(maxwidths));
187 for (i = 0; i < mntsize; i++)
799e4f0b 188 update_maxwidths(&maxwidths, &mntbuf[i], &mntvbuf[i]);
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189 for (i = 0; i < mntsize; i++) {
190 if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0)
799e4f0b 191 prtstat(&mntbuf[i], &mntvbuf[i], &maxwidths);
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192 }
193 exit(rv);
194 }
195
196 for (; *argv; argv++) {
197 if (stat(*argv, &stbuf) < 0) {
678e8cc6 198 if ((mntpt = getmntpt(*argv)) == NULL) {
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199 warn("%s", *argv);
200 rv = 1;
201 continue;
202 }
203 } else if (S_ISCHR(stbuf.st_mode)) {
678e8cc6 204 if ((mntpt = getmntpt(*argv)) == NULL) {
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205 mdev.fspec = *argv;
206 mntpath = strdup("/tmp/df.XXXXXX");
207 if (mntpath == NULL) {
208 warn("strdup failed");
209 rv = 1;
210 continue;
211 }
212 mntpt = mkdtemp(mntpath);
213 if (mntpt == NULL) {
214 warn("mkdtemp(\"%s\") failed", mntpath);
215 rv = 1;
216 free(mntpath);
217 continue;
218 }
219 if (mount(fstype, mntpt, MNT_RDONLY,
220 &mdev) != 0) {
221 rv = ufs_df(*argv, &maxwidths) || rv;
57fed2af 222 rmdir(mntpt);
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223 free(mntpath);
224 continue;
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225 } else if (statfs(mntpt, &statfsbuf) == 0 &&
226 statvfs(mntpt, &statvfsbuf) == 0) {
984263bc 227 statfsbuf.f_mntonname[0] = '\0';
799e4f0b 228 prtstat(&statfsbuf, &statvfsbuf, &maxwidths);
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229 } else {
230 warn("%s", *argv);
231 rv = 1;
232 }
57fed2af
EN
233 unmount(mntpt, 0);
234 rmdir(mntpt);
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235 free(mntpath);
236 continue;
237 }
238 } else
239 mntpt = *argv;
240 /*
241 * Statfs does not take a `wait' flag, so we cannot
242 * implement nflag here.
243 */
244 if (statfs(mntpt, &statfsbuf) < 0) {
245 warn("%s", mntpt);
246 rv = 1;
247 continue;
248 }
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249 if (statvfs(mntpt, &statvfsbuf) < 0) {
250 warn("%s", mntpt);
251 rv = 1;
252 continue;
253 }
0d0db296
AHJ
254 /*
255 * Check to make sure the arguments we've been given are
256 * satisfied. Return an error if we have been asked to
257 * list a mount point that does not match the other args
258 * we've been given (-l, -t, etc.).
259 */
260 if (checkvfsname(statfsbuf.f_fstypename, vfslist)) {
966d637c
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261 rv = 1;
262 continue;
0d0db296
AHJ
263 }
264
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265 if (argc == 1) {
266 bzero(&maxwidths, sizeof(maxwidths));
799e4f0b 267 update_maxwidths(&maxwidths, &statfsbuf, &statvfsbuf);
984263bc 268 }
799e4f0b 269 prtstat(&statfsbuf, &statvfsbuf, &maxwidths);
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270 }
271 return (rv);
272}
273
274char *
275getmntpt(char *name)
276{
277 long mntsize, i;
278 struct statfs *mntbuf;
799e4f0b 279 struct statvfs *mntvbuf;
984263bc 280
799e4f0b 281 mntsize = getmntvinfo(&mntbuf, &mntvbuf, MNT_NOWAIT);
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282 for (i = 0; i < mntsize; i++) {
283 if (!strcmp(mntbuf[i].f_mntfromname, name))
284 return (mntbuf[i].f_mntonname);
285 }
286 return (0);
287}
288
289/*
290 * Make a pass over the filesystem info in ``mntbuf'' filtering out
291 * filesystem types not in vfslist and possibly re-stating to get
292 * current (not cached) info. Returns the new count of valid statfs bufs.
293 */
294long
799e4f0b 295regetmntinfo(struct statfs **mntbufp, struct statvfs **mntvbufp, long mntsize, char **vfslist)
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296{
297 int i, j;
298 struct statfs *mntbuf;
799e4f0b 299 struct statvfs *mntvbuf;
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300
301 if (vfslist == NULL)
799e4f0b 302 return (nflag ? mntsize : getmntvinfo(mntbufp, mntvbufp, MNT_WAIT));
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303
304 mntbuf = *mntbufp;
799e4f0b 305 mntvbuf = *mntvbufp;
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306 for (j = 0, i = 0; i < mntsize; i++) {
307 if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
308 continue;
799e4f0b 309 if (!nflag) {
57fed2af 310 statfs(mntbuf[i].f_mntonname,&mntbuf[j]);
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MD
311 statvfs(mntbuf[i].f_mntonname,&mntvbuf[j]);
312 } else if (i != j) {
984263bc 313 mntbuf[j] = mntbuf[i];
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314 mntvbuf[j] = mntvbuf[i];
315 }
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316 j++;
317 }
318 return (j);
319}
320
984263bc 321void
4b378413 322prthuman(struct statvfs *vsfsp, int64_t used)
984263bc 323{
da3084db
SW
324 prthumanval(vsfsp->f_blocks * vsfsp->f_bsize);
325 prthumanval(used * vsfsp->f_bsize);
326 prthumanval(vsfsp->f_bavail * vsfsp->f_bsize);
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MD
327}
328
329void
da3084db 330prthumanval(int64_t bytes)
984263bc 331{
da3084db
SW
332 char buf[6];
333 int flags;
334
335 flags = HN_B | HN_NOSPACE | HN_DECIMAL;
336 if (hflag == UNITS_SI)
337 flags |= HN_DIVISOR_1000;
984263bc 338
da3084db
SW
339 humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1),
340 bytes, "", HN_AUTOSCALE, flags);
984263bc 341
da3084db 342 printf(" %6s", buf);
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MD
343}
344
345/*
346 * Convert statfs returned filesystem size into BLOCKSIZE units.
347 * Attempts to avoid overflow for large filesystems.
348 */
91a6f290
SW
349static intmax_t
350fsbtoblk(int64_t num, uint64_t bsize, u_long reqbsize)
799e4f0b 351{
91a6f290
SW
352 if (bsize != 0 && bsize < reqbsize)
353 return (num / (intmax_t)(reqbsize / bsize));
799e4f0b 354 else
91a6f290 355 return (num * (intmax_t)(bsize / reqbsize));
799e4f0b 356}
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357
358/*
359 * Print out status about a filesystem.
360 */
361void
799e4f0b 362prtstat(struct statfs *sfsp, struct statvfs *vsfsp, struct maxwidths *mwp)
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363{
364 static long blocksize;
365 static int headerlen, timesthrough;
366 static const char *header;
799e4f0b 367 int64_t used, availblks, inodes;
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MD
368
369 if (++timesthrough == 1) {
370 mwp->mntfrom = imax(mwp->mntfrom, strlen("Filesystem"));
371 if (hflag) {
372 header = " Size";
373 mwp->total = mwp->used = mwp->avail = strlen(header);
374 } else {
375 header = getbsize(&headerlen, &blocksize);
376 mwp->total = imax(mwp->total, headerlen);
377 }
378 mwp->used = imax(mwp->used, strlen("Used"));
379 mwp->avail = imax(mwp->avail, strlen("Avail"));
380
57fed2af 381 printf("%-*s %-*s %*s %*s Capacity", mwp->mntfrom,
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382 "Filesystem", mwp->total, header, mwp->used, "Used",
383 mwp->avail, "Avail");
384 if (iflag) {
385 mwp->iused = imax(mwp->iused, strlen(" iused"));
386 mwp->ifree = imax(mwp->ifree, strlen("ifree"));
57fed2af 387 printf(" %*s %*s %%iused", mwp->iused - 2,
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388 "iused", mwp->ifree, "ifree");
389 }
57fed2af 390 printf(" Mounted on\n");
984263bc 391 }
57fed2af 392 printf("%-*s", mwp->mntfrom, sfsp->f_mntfromname);
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MD
393 used = vsfsp->f_blocks - vsfsp->f_bfree;
394 availblks = vsfsp->f_bavail + used;
984263bc 395 if (hflag) {
799e4f0b 396 prthuman(vsfsp, used);
984263bc 397 } else {
91a6f290 398 printf(" %*jd %*jd %*jd", mwp->total,
799e4f0b
MD
399 fsbtoblk(vsfsp->f_blocks, vsfsp->f_bsize, blocksize),
400 mwp->used, fsbtoblk(used, vsfsp->f_bsize, blocksize),
401 mwp->avail, fsbtoblk(vsfsp->f_bavail, vsfsp->f_bsize,
984263bc
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402 blocksize));
403 }
57fed2af 404 printf(" %5.0f%%",
984263bc
MD
405 availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
406 if (iflag) {
799e4f0b
MD
407 inodes = vsfsp->f_files;
408 used = inodes - vsfsp->f_ffree;
91a6f290
SW
409 printf(" %*jd %*jd %4.0f%% ", mwp->iused, (intmax_t)used,
410 mwp->ifree, (intmax_t)vsfsp->f_ffree, inodes == 0 ? 100.0 :
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MD
411 (double)used / (double)inodes * 100.0);
412 } else
57fed2af
EN
413 printf(" ");
414 printf(" %s\n", sfsp->f_mntonname);
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MD
415}
416
417/*
418 * Update the maximum field-width information in `mwp' based on
419 * the filesystem specified by `sfsp'.
420 */
421void
799e4f0b 422update_maxwidths(struct maxwidths *mwp, struct statfs *sfsp, struct statvfs *vsfsp)
984263bc
MD
423{
424 static long blocksize;
425 int dummy;
426
427 if (blocksize == 0)
428 getbsize(&dummy, &blocksize);
429
430 mwp->mntfrom = imax(mwp->mntfrom, strlen(sfsp->f_mntfromname));
799e4f0b
MD
431 mwp->total = imax(mwp->total, quadwidth(fsbtoblk(vsfsp->f_blocks,
432 vsfsp->f_bsize, blocksize)));
433 mwp->used = imax(mwp->used, quadwidth(fsbtoblk(vsfsp->f_blocks -
434 vsfsp->f_bfree, vsfsp->f_bsize, blocksize)));
435 mwp->avail = imax(mwp->avail, quadwidth(fsbtoblk(vsfsp->f_bavail,
436 vsfsp->f_bsize, blocksize)));
437 mwp->iused = imax(mwp->iused, quadwidth(vsfsp->f_files -
438 vsfsp->f_ffree));
439 mwp->ifree = imax(mwp->ifree, quadwidth(vsfsp->f_ffree));
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MD
440}
441
442/* Return the width in characters of the specified long. */
443int
799e4f0b 444quadwidth(int64_t val)
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MD
445{
446 int len;
447
448 len = 0;
449 /* Negative or zero values require one extra digit. */
450 if (val <= 0) {
451 val = -val;
452 len++;
453 }
454 while (val > 0) {
455 len++;
456 val /= 10;
457 }
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458 return (len);
459}
460
461/*
462 * This code constitutes the pre-system call Berkeley df code for extracting
463 * information from filesystem superblocks.
464 */
465
466union {
467 struct fs iu_fs;
468 char dummy[SBSIZE];
469} sb;
470#define sblock sb.iu_fs
471
472int rfd;
473
474int
475ufs_df(char *file, struct maxwidths *mwp)
476{
477 struct statfs statfsbuf;
799e4f0b 478 struct statvfs statvfsbuf;
984263bc 479 struct statfs *sfsp;
799e4f0b 480 struct statvfs *vsfsp;
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481 const char *mntpt;
482 static int synced;
483
484 if (synced++ == 0)
485 sync();
486
487 if ((rfd = open(file, O_RDONLY)) < 0) {
488 warn("%s", file);
489 return (1);
490 }
491 if (bread((off_t)SBOFF, &sblock, SBSIZE) == 0) {
57fed2af 492 close(rfd);
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MD
493 return (1);
494 }
495 sfsp = &statfsbuf;
799e4f0b 496 vsfsp = &statvfsbuf;
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497 sfsp->f_type = 1;
498 strcpy(sfsp->f_fstypename, "ufs");
499 sfsp->f_flags = 0;
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MD
500 sfsp->f_bsize = vsfsp->f_bsize = sblock.fs_fsize;
501 sfsp->f_iosize = vsfsp->f_frsize = sblock.fs_bsize;
502 sfsp->f_blocks = vsfsp->f_blocks = sblock.fs_dsize;
503 sfsp->f_bfree = vsfsp->f_bfree =
504 sblock.fs_cstotal.cs_nbfree * sblock.fs_frag +
984263bc 505 sblock.fs_cstotal.cs_nffree;
799e4f0b
MD
506 sfsp->f_bavail = vsfsp->f_bavail = freespace(&sblock, sblock.fs_minfree);
507 sfsp->f_files = vsfsp->f_files = sblock.fs_ncg * sblock.fs_ipg;
508 sfsp->f_ffree = vsfsp->f_ffree = sblock.fs_cstotal.cs_nifree;
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MD
509 sfsp->f_fsid.val[0] = 0;
510 sfsp->f_fsid.val[1] = 0;
678e8cc6 511 if ((mntpt = getmntpt(file)) == NULL)
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512 mntpt = "";
513 memmove(&sfsp->f_mntonname[0], mntpt, (size_t)MNAMELEN);
514 memmove(&sfsp->f_mntfromname[0], file, (size_t)MNAMELEN);
799e4f0b 515 prtstat(sfsp, vsfsp, mwp);
57fed2af 516 close(rfd);
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517 return (0);
518}
519
520int
521bread(off_t off, void *buf, int cnt)
522{
523 ssize_t nr;
524
57fed2af 525 lseek(rfd, off, SEEK_SET);
984263bc
MD
526 if ((nr = read(rfd, buf, (size_t)cnt)) != (ssize_t)cnt) {
527 /* Probably a dismounted disk if errno == EIO. */
528 if (errno != EIO)
57fed2af 529 fprintf(stderr, "\ndf: %lld: %s\n",
984263bc
MD
530 (long long)off, strerror(nr > 0 ? EIO : errno));
531 return (0);
532 }
533 return (1);
534}
535
536void
537usage(void)
538{
539
57fed2af 540 fprintf(stderr,
984263bc
MD
541 "usage: df [-b | -H | -h | -k | -m | -P] [-ailn] [-t type] [file | filesystem ...]\n");
542 exit(EX_USAGE);
543}
544
545char *
546makenetvfslist(void)
547{
548 char *str, *strptr, **listptr;
549 int mib[3], maxvfsconf, cnt=0, i;
550 size_t miblen;
551 struct ovfsconf *ptr;
552
553 mib[0] = CTL_VFS; mib[1] = VFS_GENERIC; mib[2] = VFS_MAXTYPENUM;
554 miblen=sizeof(maxvfsconf);
555 if (sysctl(mib, (unsigned int)(sizeof(mib) / sizeof(mib[0])),
556 &maxvfsconf, &miblen, NULL, 0)) {
557 warnx("sysctl failed");
558 return (NULL);
559 }
560
561 if ((listptr = malloc(sizeof(char*) * maxvfsconf)) == NULL) {
562 warnx("malloc failed");
563 return (NULL);
564 }
565
566 for (ptr = getvfsent(); ptr; ptr = getvfsent())
567 if (ptr->vfc_flags & VFCF_NETWORK) {
568 listptr[cnt++] = strdup(ptr->vfc_name);
569 if (listptr[cnt-1] == NULL) {
570 warnx("malloc failed");
571 return (NULL);
572 }
573 }
574
575 if (cnt == 0 ||
576 (str = malloc(sizeof(char) * (32 * cnt + cnt + 2))) == NULL) {
577 if (cnt > 0)
578 warnx("malloc failed");
579 free(listptr);
580 return (NULL);
581 }
582
583 *str = 'n'; *(str + 1) = 'o';
584 for (i = 0, strptr = str + 2; i < cnt; i++, strptr++) {
585 strncpy(strptr, listptr[i], 32);
586 strptr += strlen(listptr[i]);
587 *strptr = ',';
588 free(listptr[i]);
589 }
eecd52b2 590 *(--strptr) = '\0';
984263bc
MD
591
592 free(listptr);
593 return (str);
594}