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 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#if 0
36#ifndef lint
37static const char copyright[] =
38"@(#) Copyright (c) 1980, 1990, 1993, 1994\n\
39 The Regents of the University of California. All rights reserved.\n";
40#endif /* not lint */
41
42#ifndef lint
43static char sccsid[] = "@(#)df.c 8.9 (Berkeley) 5/8/95";
44#endif /* not lint */
45#endif
46#include <sys/cdefs.h>
| 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 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#if 0
36#ifndef lint
37static const char copyright[] =
38"@(#) Copyright (c) 1980, 1990, 1993, 1994\n\
39 The Regents of the University of California. All rights reserved.\n";
40#endif /* not lint */
41
42#ifndef lint
43static char sccsid[] = "@(#)df.c 8.9 (Berkeley) 5/8/95";
44#endif /* not lint */
45#endif
46#include <sys/cdefs.h>
|
48
49#include <sys/param.h>
50#include <sys/stat.h>
51#include <sys/mount.h>
52#include <sys/sysctl.h>
53#include <ufs/ufs/ufsmount.h>
54#include <err.h>
55#include <libutil.h>
56#include <stdint.h>
57#include <stdio.h>
58#include <stdlib.h>
59#include <string.h>
60#include <sysexits.h>
61#include <unistd.h>
62
63#include "extern.h"
64
65#define UNITS_SI 1
66#define UNITS_2 2
67
68/* Maximum widths of various fields. */
69struct maxwidths {
70 int mntfrom;
71 int total;
72 int used;
73 int avail;
74 int iused;
75 int ifree;
76};
77
78static void addstat(struct statfs *, struct statfs *);
79static char *getmntpt(const char *);
80static int int64width(int64_t);
81static char *makenetvfslist(void);
82static void prthuman(const struct statfs *, int64_t);
83static void prthumanval(int64_t);
84static intmax_t fsbtoblk(int64_t, uint64_t, u_long);
85static void prtstat(struct statfs *, struct maxwidths *);
86static size_t regetmntinfo(struct statfs **, long, const char **);
87static void update_maxwidths(struct maxwidths *, const struct statfs *);
88static void usage(void);
89
90static __inline int
91imax(int a, int b)
92{
93 return (a > b ? a : b);
94}
95
96static int aflag = 0, cflag, hflag, iflag, kflag, lflag = 0, nflag;
97static struct ufs_args mdev;
98
99int
100main(int argc, char *argv[])
101{
102 struct stat stbuf;
103 struct statfs statfsbuf, totalbuf;
104 struct maxwidths maxwidths;
105 struct statfs *mntbuf;
106 const char *fstype;
107 char *mntpath, *mntpt;
108 const char **vfslist;
109 size_t i, mntsize;
110 int ch, rv;
111
112 fstype = "ufs";
113
114 memset(&totalbuf, 0, sizeof(totalbuf));
115 totalbuf.f_bsize = DEV_BSIZE;
116 strlcpy(totalbuf.f_mntfromname, "total", MNAMELEN);
117 vfslist = NULL;
118 while ((ch = getopt(argc, argv, "abcgHhiklmnPt:")) != -1)
119 switch (ch) {
120 case 'a':
121 aflag = 1;
122 break;
123 case 'b':
124 /* FALLTHROUGH */
125 case 'P':
126 /*
127 * POSIX specifically discusses the the behavior of
128 * both -k and -P. It states that the blocksize should
129 * be set to 1024. Thus, if this occurs, simply break
130 * rather than clobbering the old blocksize.
131 */
132 if (kflag)
133 break;
| 48
49#include <sys/param.h>
50#include <sys/stat.h>
51#include <sys/mount.h>
52#include <sys/sysctl.h>
53#include <ufs/ufs/ufsmount.h>
54#include <err.h>
55#include <libutil.h>
56#include <stdint.h>
57#include <stdio.h>
58#include <stdlib.h>
59#include <string.h>
60#include <sysexits.h>
61#include <unistd.h>
62
63#include "extern.h"
64
65#define UNITS_SI 1
66#define UNITS_2 2
67
68/* Maximum widths of various fields. */
69struct maxwidths {
70 int mntfrom;
71 int total;
72 int used;
73 int avail;
74 int iused;
75 int ifree;
76};
77
78static void addstat(struct statfs *, struct statfs *);
79static char *getmntpt(const char *);
80static int int64width(int64_t);
81static char *makenetvfslist(void);
82static void prthuman(const struct statfs *, int64_t);
83static void prthumanval(int64_t);
84static intmax_t fsbtoblk(int64_t, uint64_t, u_long);
85static void prtstat(struct statfs *, struct maxwidths *);
86static size_t regetmntinfo(struct statfs **, long, const char **);
87static void update_maxwidths(struct maxwidths *, const struct statfs *);
88static void usage(void);
89
90static __inline int
91imax(int a, int b)
92{
93 return (a > b ? a : b);
94}
95
96static int aflag = 0, cflag, hflag, iflag, kflag, lflag = 0, nflag;
97static struct ufs_args mdev;
98
99int
100main(int argc, char *argv[])
101{
102 struct stat stbuf;
103 struct statfs statfsbuf, totalbuf;
104 struct maxwidths maxwidths;
105 struct statfs *mntbuf;
106 const char *fstype;
107 char *mntpath, *mntpt;
108 const char **vfslist;
109 size_t i, mntsize;
110 int ch, rv;
111
112 fstype = "ufs";
113
114 memset(&totalbuf, 0, sizeof(totalbuf));
115 totalbuf.f_bsize = DEV_BSIZE;
116 strlcpy(totalbuf.f_mntfromname, "total", MNAMELEN);
117 vfslist = NULL;
118 while ((ch = getopt(argc, argv, "abcgHhiklmnPt:")) != -1)
119 switch (ch) {
120 case 'a':
121 aflag = 1;
122 break;
123 case 'b':
124 /* FALLTHROUGH */
125 case 'P':
126 /*
127 * POSIX specifically discusses the the behavior of
128 * both -k and -P. It states that the blocksize should
129 * be set to 1024. Thus, if this occurs, simply break
130 * rather than clobbering the old blocksize.
131 */
132 if (kflag)
133 break;
|
166 hflag = 0;
167 break;
168 case 'n':
169 nflag = 1;
170 break;
171 case 't':
172 if (lflag)
173 errx(1, "-l and -t are mutually exclusive.");
174 if (vfslist != NULL)
175 errx(1, "only one -t option may be specified");
176 fstype = optarg;
177 vfslist = makevfslist(optarg);
178 break;
179 case '?':
180 default:
181 usage();
182 }
183 argc -= optind;
184 argv += optind;
185
186 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
187 bzero(&maxwidths, sizeof(maxwidths));
188 for (i = 0; i < mntsize; i++)
189 update_maxwidths(&maxwidths, &mntbuf[i]);
190
191 rv = 0;
192 if (!*argv) {
193 mntsize = regetmntinfo(&mntbuf, mntsize, vfslist);
194 bzero(&maxwidths, sizeof(maxwidths));
195 for (i = 0; i < mntsize; i++) {
196 if (cflag)
197 addstat(&totalbuf, &mntbuf[i]);
198 update_maxwidths(&maxwidths, &mntbuf[i]);
199 }
200 if (cflag)
201 update_maxwidths(&maxwidths, &totalbuf);
202 for (i = 0; i < mntsize; i++)
203 if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0)
204 prtstat(&mntbuf[i], &maxwidths);
205 if (cflag)
206 prtstat(&totalbuf, &maxwidths);
207 exit(rv);
208 }
209
210 for (; *argv; argv++) {
211 if (stat(*argv, &stbuf) < 0) {
212 if ((mntpt = getmntpt(*argv)) == 0) {
213 warn("%s", *argv);
214 rv = 1;
215 continue;
216 }
217 } else if (S_ISCHR(stbuf.st_mode)) {
218 if ((mntpt = getmntpt(*argv)) == 0) {
219 mdev.fspec = *argv;
220 mntpath = strdup("/tmp/df.XXXXXX");
221 if (mntpath == NULL) {
222 warn("strdup failed");
223 rv = 1;
224 continue;
225 }
226 mntpt = mkdtemp(mntpath);
227 if (mntpt == NULL) {
228 warn("mkdtemp(\"%s\") failed", mntpath);
229 rv = 1;
230 free(mntpath);
231 continue;
232 }
233 if (mount(fstype, mntpt, MNT_RDONLY,
234 &mdev) != 0) {
235 warn("%s", *argv);
236 rv = 1;
237 (void)rmdir(mntpt);
238 free(mntpath);
239 continue;
240 } else if (statfs(mntpt, &statfsbuf) == 0) {
241 statfsbuf.f_mntonname[0] = '\0';
242 prtstat(&statfsbuf, &maxwidths);
243 if (cflag)
244 addstat(&totalbuf, &statfsbuf);
245 } else {
246 warn("%s", *argv);
247 rv = 1;
248 }
249 (void)unmount(mntpt, 0);
250 (void)rmdir(mntpt);
251 free(mntpath);
252 continue;
253 }
254 } else
255 mntpt = *argv;
256
257 /*
258 * Statfs does not take a `wait' flag, so we cannot
259 * implement nflag here.
260 */
261 if (statfs(mntpt, &statfsbuf) < 0) {
262 warn("%s", mntpt);
263 rv = 1;
264 continue;
265 }
266
267 /*
268 * Check to make sure the arguments we've been given are
269 * satisfied. Return an error if we have been asked to
270 * list a mount point that does not match the other args
271 * we've been given (-l, -t, etc.).
272 */
273 if (checkvfsname(statfsbuf.f_fstypename, vfslist)) {
274 rv = 1;
275 continue;
276 }
277
278 if (argc == 1) {
279 bzero(&maxwidths, sizeof(maxwidths));
280 update_maxwidths(&maxwidths, &statfsbuf);
281 }
282 prtstat(&statfsbuf, &maxwidths);
283 if (cflag)
284 addstat(&totalbuf, &statfsbuf);
285 }
286 if (cflag)
287 prtstat(&totalbuf, &maxwidths);
288 return (rv);
289}
290
291static char *
292getmntpt(const char *name)
293{
294 size_t mntsize, i;
295 struct statfs *mntbuf;
296
297 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
298 for (i = 0; i < mntsize; i++) {
299 if (!strcmp(mntbuf[i].f_mntfromname, name))
300 return (mntbuf[i].f_mntonname);
301 }
302 return (0);
303}
304
305/*
306 * Make a pass over the file system info in ``mntbuf'' filtering out
307 * file system types not in vfslist and possibly re-stating to get
308 * current (not cached) info. Returns the new count of valid statfs bufs.
309 */
310static size_t
311regetmntinfo(struct statfs **mntbufp, long mntsize, const char **vfslist)
312{
313 int error, i, j;
314 struct statfs *mntbuf;
315
316 if (vfslist == NULL)
317 return (nflag ? mntsize : getmntinfo(mntbufp, MNT_WAIT));
318
319 mntbuf = *mntbufp;
320 for (j = 0, i = 0; i < mntsize; i++) {
321 if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
322 continue;
323 /*
324 * XXX statfs(2) can fail for various reasons. It may be
325 * possible that the user does not have access to the
326 * pathname, if this happens, we will fall back on
327 * "stale" filesystem statistics.
328 */
329 error = statfs(mntbuf[i].f_mntonname, &mntbuf[j]);
330 if (nflag || error < 0)
331 if (i != j) {
332 if (error < 0)
333 warnx("%s stats possibly stale",
334 mntbuf[i].f_mntonname);
335 mntbuf[j] = mntbuf[i];
336 }
337 j++;
338 }
339 return (j);
340}
341
342static void
343prthuman(const struct statfs *sfsp, int64_t used)
344{
345
346 prthumanval(sfsp->f_blocks * sfsp->f_bsize);
347 prthumanval(used * sfsp->f_bsize);
348 prthumanval(sfsp->f_bavail * sfsp->f_bsize);
349}
350
351static void
352prthumanval(int64_t bytes)
353{
354 char buf[6];
355 int flags;
356
357 flags = HN_B | HN_NOSPACE | HN_DECIMAL;
358 if (hflag == UNITS_SI)
359 flags |= HN_DIVISOR_1000;
360
361 humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1),
362 bytes, "", HN_AUTOSCALE, flags);
363
364 (void)printf(" %6s", buf);
365}
366
367/*
368 * Convert statfs returned file system size into BLOCKSIZE units.
369 * Attempts to avoid overflow for large file systems.
370 */
371static intmax_t
372fsbtoblk(int64_t num, uint64_t fsbs, u_long bs)
373{
374
375 if (fsbs != 0 && fsbs < bs)
376 return (num / (intmax_t)(bs / fsbs));
377 else
378 return (num * (intmax_t)(fsbs / bs));
379}
380
381/*
382 * Print out status about a file system.
383 */
384static void
385prtstat(struct statfs *sfsp, struct maxwidths *mwp)
386{
387 static long blocksize;
388 static int headerlen, timesthrough = 0;
389 static const char *header;
390 int64_t used, availblks, inodes;
391
392 if (++timesthrough == 1) {
393 mwp->mntfrom = imax(mwp->mntfrom, (int)strlen("Filesystem"));
394 if (hflag) {
395 header = " Size";
396 mwp->total = mwp->used = mwp->avail =
397 (int)strlen(header);
398 } else {
399 header = getbsize(&headerlen, &blocksize);
400 mwp->total = imax(mwp->total, headerlen);
401 }
402 mwp->used = imax(mwp->used, (int)strlen("Used"));
403 mwp->avail = imax(mwp->avail, (int)strlen("Avail"));
404
405 (void)printf("%-*s %-*s %*s %*s Capacity",
406 mwp->mntfrom, "Filesystem", mwp->total, header,
407 mwp->used, "Used", mwp->avail, "Avail");
408 if (iflag) {
409 mwp->iused = imax(mwp->iused, (int)strlen(" iused"));
410 mwp->ifree = imax(mwp->ifree, (int)strlen("ifree"));
411 (void)printf(" %*s %*s %%iused",
412 mwp->iused - 2, "iused", mwp->ifree, "ifree");
413 }
414 (void)printf(" Mounted on\n");
415 }
416 (void)printf("%-*s", mwp->mntfrom, sfsp->f_mntfromname);
417 used = sfsp->f_blocks - sfsp->f_bfree;
418 availblks = sfsp->f_bavail + used;
419 if (hflag) {
420 prthuman(sfsp, used);
421 } else {
422 (void)printf(" %*jd %*jd %*jd",
423 mwp->total, fsbtoblk(sfsp->f_blocks,
424 sfsp->f_bsize, blocksize),
425 mwp->used, fsbtoblk(used, sfsp->f_bsize, blocksize),
426 mwp->avail, fsbtoblk(sfsp->f_bavail,
427 sfsp->f_bsize, blocksize));
428 }
429 (void)printf(" %5.0f%%",
430 availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
431 if (iflag) {
432 inodes = sfsp->f_files;
433 used = inodes - sfsp->f_ffree;
434 (void)printf(" %*jd %*jd %4.0f%% ", mwp->iused, (intmax_t)used,
435 mwp->ifree, (intmax_t)sfsp->f_ffree, inodes == 0 ? 100.0 :
436 (double)used / (double)inodes * 100.0);
437 } else
438 (void)printf(" ");
439 if (strncmp(sfsp->f_mntfromname, "total", MNAMELEN) != 0)
440 (void)printf(" %s", sfsp->f_mntonname);
441 (void)printf("\n");
442}
443
444void
445addstat(struct statfs *totalfsp, struct statfs *statfsp)
446{
447 uint64_t bsize;
448
449 bsize = statfsp->f_bsize / totalfsp->f_bsize;
450 totalfsp->f_blocks += statfsp->f_blocks * bsize;
451 totalfsp->f_bfree += statfsp->f_bfree * bsize;
452 totalfsp->f_bavail += statfsp->f_bavail * bsize;
453 totalfsp->f_files += statfsp->f_files;
454 totalfsp->f_ffree += statfsp->f_ffree;
455}
456
457/*
458 * Update the maximum field-width information in `mwp' based on
459 * the file system specified by `sfsp'.
460 */
461static void
462update_maxwidths(struct maxwidths *mwp, const struct statfs *sfsp)
463{
464 static long blocksize = 0;
465 int dummy;
466
467 if (blocksize == 0)
468 getbsize(&dummy, &blocksize);
469
470 mwp->mntfrom = imax(mwp->mntfrom, (int)strlen(sfsp->f_mntfromname));
471 mwp->total = imax(mwp->total, int64width(
472 fsbtoblk((int64_t)sfsp->f_blocks, sfsp->f_bsize, blocksize)));
473 mwp->used = imax(mwp->used,
474 int64width(fsbtoblk((int64_t)sfsp->f_blocks -
475 (int64_t)sfsp->f_bfree, sfsp->f_bsize, blocksize)));
476 mwp->avail = imax(mwp->avail, int64width(fsbtoblk(sfsp->f_bavail,
477 sfsp->f_bsize, blocksize)));
478 mwp->iused = imax(mwp->iused, int64width((int64_t)sfsp->f_files -
479 sfsp->f_ffree));
480 mwp->ifree = imax(mwp->ifree, int64width(sfsp->f_ffree));
481}
482
483/* Return the width in characters of the specified value. */
484static int
485int64width(int64_t val)
486{
487 int len;
488
489 len = 0;
490 /* Negative or zero values require one extra digit. */
491 if (val <= 0) {
492 val = -val;
493 len++;
494 }
495 while (val > 0) {
496 len++;
497 val /= 10;
498 }
499
500 return (len);
501}
502
503static void
504usage(void)
505{
506
507 (void)fprintf(stderr,
508"usage: df [-b | -g | -H | -h | -k | -m | -P] [-aciln] [-t type] [file | filesystem ...]\n");
509 exit(EX_USAGE);
510}
511
512static char *
513makenetvfslist(void)
514{
515 char *str, *strptr, **listptr;
516 struct xvfsconf *xvfsp, *keep_xvfsp;
517 size_t buflen;
518 int cnt, i, maxvfsconf;
519
520 if (sysctlbyname("vfs.conflist", NULL, &buflen, NULL, 0) < 0) {
521 warn("sysctl(vfs.conflist)");
522 return (NULL);
523 }
524 xvfsp = malloc(buflen);
525 if (xvfsp == NULL) {
526 warnx("malloc failed");
527 return (NULL);
528 }
529 keep_xvfsp = xvfsp;
530 if (sysctlbyname("vfs.conflist", xvfsp, &buflen, NULL, 0) < 0) {
531 warn("sysctl(vfs.conflist)");
532 free(keep_xvfsp);
533 return (NULL);
534 }
535 maxvfsconf = buflen / sizeof(struct xvfsconf);
536
537 if ((listptr = malloc(sizeof(char*) * maxvfsconf)) == NULL) {
538 warnx("malloc failed");
539 free(keep_xvfsp);
540 return (NULL);
541 }
542
543 for (cnt = 0, i = 0; i < maxvfsconf; i++) {
544 if (xvfsp->vfc_flags & VFCF_NETWORK) {
545 listptr[cnt++] = strdup(xvfsp->vfc_name);
546 if (listptr[cnt-1] == NULL) {
547 warnx("malloc failed");
548 free(listptr);
549 free(keep_xvfsp);
550 return (NULL);
551 }
552 }
553 xvfsp++;
554 }
555
556 if (cnt == 0 ||
557 (str = malloc(sizeof(char) * (32 * cnt + cnt + 2))) == NULL) {
558 if (cnt > 0)
559 warnx("malloc failed");
560 free(listptr);
561 free(keep_xvfsp);
562 return (NULL);
563 }
564
565 *str = 'n'; *(str + 1) = 'o';
566 for (i = 0, strptr = str + 2; i < cnt; i++, strptr++) {
567 strlcpy(strptr, listptr[i], 32);
568 strptr += strlen(listptr[i]);
569 *strptr = ',';
570 free(listptr[i]);
571 }
572 *(--strptr) = '\0';
573
574 free(keep_xvfsp);
575 free(listptr);
576 return (str);
577}
| 166 hflag = 0;
167 break;
168 case 'n':
169 nflag = 1;
170 break;
171 case 't':
172 if (lflag)
173 errx(1, "-l and -t are mutually exclusive.");
174 if (vfslist != NULL)
175 errx(1, "only one -t option may be specified");
176 fstype = optarg;
177 vfslist = makevfslist(optarg);
178 break;
179 case '?':
180 default:
181 usage();
182 }
183 argc -= optind;
184 argv += optind;
185
186 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
187 bzero(&maxwidths, sizeof(maxwidths));
188 for (i = 0; i < mntsize; i++)
189 update_maxwidths(&maxwidths, &mntbuf[i]);
190
191 rv = 0;
192 if (!*argv) {
193 mntsize = regetmntinfo(&mntbuf, mntsize, vfslist);
194 bzero(&maxwidths, sizeof(maxwidths));
195 for (i = 0; i < mntsize; i++) {
196 if (cflag)
197 addstat(&totalbuf, &mntbuf[i]);
198 update_maxwidths(&maxwidths, &mntbuf[i]);
199 }
200 if (cflag)
201 update_maxwidths(&maxwidths, &totalbuf);
202 for (i = 0; i < mntsize; i++)
203 if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0)
204 prtstat(&mntbuf[i], &maxwidths);
205 if (cflag)
206 prtstat(&totalbuf, &maxwidths);
207 exit(rv);
208 }
209
210 for (; *argv; argv++) {
211 if (stat(*argv, &stbuf) < 0) {
212 if ((mntpt = getmntpt(*argv)) == 0) {
213 warn("%s", *argv);
214 rv = 1;
215 continue;
216 }
217 } else if (S_ISCHR(stbuf.st_mode)) {
218 if ((mntpt = getmntpt(*argv)) == 0) {
219 mdev.fspec = *argv;
220 mntpath = strdup("/tmp/df.XXXXXX");
221 if (mntpath == NULL) {
222 warn("strdup failed");
223 rv = 1;
224 continue;
225 }
226 mntpt = mkdtemp(mntpath);
227 if (mntpt == NULL) {
228 warn("mkdtemp(\"%s\") failed", mntpath);
229 rv = 1;
230 free(mntpath);
231 continue;
232 }
233 if (mount(fstype, mntpt, MNT_RDONLY,
234 &mdev) != 0) {
235 warn("%s", *argv);
236 rv = 1;
237 (void)rmdir(mntpt);
238 free(mntpath);
239 continue;
240 } else if (statfs(mntpt, &statfsbuf) == 0) {
241 statfsbuf.f_mntonname[0] = '\0';
242 prtstat(&statfsbuf, &maxwidths);
243 if (cflag)
244 addstat(&totalbuf, &statfsbuf);
245 } else {
246 warn("%s", *argv);
247 rv = 1;
248 }
249 (void)unmount(mntpt, 0);
250 (void)rmdir(mntpt);
251 free(mntpath);
252 continue;
253 }
254 } else
255 mntpt = *argv;
256
257 /*
258 * Statfs does not take a `wait' flag, so we cannot
259 * implement nflag here.
260 */
261 if (statfs(mntpt, &statfsbuf) < 0) {
262 warn("%s", mntpt);
263 rv = 1;
264 continue;
265 }
266
267 /*
268 * Check to make sure the arguments we've been given are
269 * satisfied. Return an error if we have been asked to
270 * list a mount point that does not match the other args
271 * we've been given (-l, -t, etc.).
272 */
273 if (checkvfsname(statfsbuf.f_fstypename, vfslist)) {
274 rv = 1;
275 continue;
276 }
277
278 if (argc == 1) {
279 bzero(&maxwidths, sizeof(maxwidths));
280 update_maxwidths(&maxwidths, &statfsbuf);
281 }
282 prtstat(&statfsbuf, &maxwidths);
283 if (cflag)
284 addstat(&totalbuf, &statfsbuf);
285 }
286 if (cflag)
287 prtstat(&totalbuf, &maxwidths);
288 return (rv);
289}
290
291static char *
292getmntpt(const char *name)
293{
294 size_t mntsize, i;
295 struct statfs *mntbuf;
296
297 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
298 for (i = 0; i < mntsize; i++) {
299 if (!strcmp(mntbuf[i].f_mntfromname, name))
300 return (mntbuf[i].f_mntonname);
301 }
302 return (0);
303}
304
305/*
306 * Make a pass over the file system info in ``mntbuf'' filtering out
307 * file system types not in vfslist and possibly re-stating to get
308 * current (not cached) info. Returns the new count of valid statfs bufs.
309 */
310static size_t
311regetmntinfo(struct statfs **mntbufp, long mntsize, const char **vfslist)
312{
313 int error, i, j;
314 struct statfs *mntbuf;
315
316 if (vfslist == NULL)
317 return (nflag ? mntsize : getmntinfo(mntbufp, MNT_WAIT));
318
319 mntbuf = *mntbufp;
320 for (j = 0, i = 0; i < mntsize; i++) {
321 if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
322 continue;
323 /*
324 * XXX statfs(2) can fail for various reasons. It may be
325 * possible that the user does not have access to the
326 * pathname, if this happens, we will fall back on
327 * "stale" filesystem statistics.
328 */
329 error = statfs(mntbuf[i].f_mntonname, &mntbuf[j]);
330 if (nflag || error < 0)
331 if (i != j) {
332 if (error < 0)
333 warnx("%s stats possibly stale",
334 mntbuf[i].f_mntonname);
335 mntbuf[j] = mntbuf[i];
336 }
337 j++;
338 }
339 return (j);
340}
341
342static void
343prthuman(const struct statfs *sfsp, int64_t used)
344{
345
346 prthumanval(sfsp->f_blocks * sfsp->f_bsize);
347 prthumanval(used * sfsp->f_bsize);
348 prthumanval(sfsp->f_bavail * sfsp->f_bsize);
349}
350
351static void
352prthumanval(int64_t bytes)
353{
354 char buf[6];
355 int flags;
356
357 flags = HN_B | HN_NOSPACE | HN_DECIMAL;
358 if (hflag == UNITS_SI)
359 flags |= HN_DIVISOR_1000;
360
361 humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1),
362 bytes, "", HN_AUTOSCALE, flags);
363
364 (void)printf(" %6s", buf);
365}
366
367/*
368 * Convert statfs returned file system size into BLOCKSIZE units.
369 * Attempts to avoid overflow for large file systems.
370 */
371static intmax_t
372fsbtoblk(int64_t num, uint64_t fsbs, u_long bs)
373{
374
375 if (fsbs != 0 && fsbs < bs)
376 return (num / (intmax_t)(bs / fsbs));
377 else
378 return (num * (intmax_t)(fsbs / bs));
379}
380
381/*
382 * Print out status about a file system.
383 */
384static void
385prtstat(struct statfs *sfsp, struct maxwidths *mwp)
386{
387 static long blocksize;
388 static int headerlen, timesthrough = 0;
389 static const char *header;
390 int64_t used, availblks, inodes;
391
392 if (++timesthrough == 1) {
393 mwp->mntfrom = imax(mwp->mntfrom, (int)strlen("Filesystem"));
394 if (hflag) {
395 header = " Size";
396 mwp->total = mwp->used = mwp->avail =
397 (int)strlen(header);
398 } else {
399 header = getbsize(&headerlen, &blocksize);
400 mwp->total = imax(mwp->total, headerlen);
401 }
402 mwp->used = imax(mwp->used, (int)strlen("Used"));
403 mwp->avail = imax(mwp->avail, (int)strlen("Avail"));
404
405 (void)printf("%-*s %-*s %*s %*s Capacity",
406 mwp->mntfrom, "Filesystem", mwp->total, header,
407 mwp->used, "Used", mwp->avail, "Avail");
408 if (iflag) {
409 mwp->iused = imax(mwp->iused, (int)strlen(" iused"));
410 mwp->ifree = imax(mwp->ifree, (int)strlen("ifree"));
411 (void)printf(" %*s %*s %%iused",
412 mwp->iused - 2, "iused", mwp->ifree, "ifree");
413 }
414 (void)printf(" Mounted on\n");
415 }
416 (void)printf("%-*s", mwp->mntfrom, sfsp->f_mntfromname);
417 used = sfsp->f_blocks - sfsp->f_bfree;
418 availblks = sfsp->f_bavail + used;
419 if (hflag) {
420 prthuman(sfsp, used);
421 } else {
422 (void)printf(" %*jd %*jd %*jd",
423 mwp->total, fsbtoblk(sfsp->f_blocks,
424 sfsp->f_bsize, blocksize),
425 mwp->used, fsbtoblk(used, sfsp->f_bsize, blocksize),
426 mwp->avail, fsbtoblk(sfsp->f_bavail,
427 sfsp->f_bsize, blocksize));
428 }
429 (void)printf(" %5.0f%%",
430 availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
431 if (iflag) {
432 inodes = sfsp->f_files;
433 used = inodes - sfsp->f_ffree;
434 (void)printf(" %*jd %*jd %4.0f%% ", mwp->iused, (intmax_t)used,
435 mwp->ifree, (intmax_t)sfsp->f_ffree, inodes == 0 ? 100.0 :
436 (double)used / (double)inodes * 100.0);
437 } else
438 (void)printf(" ");
439 if (strncmp(sfsp->f_mntfromname, "total", MNAMELEN) != 0)
440 (void)printf(" %s", sfsp->f_mntonname);
441 (void)printf("\n");
442}
443
444void
445addstat(struct statfs *totalfsp, struct statfs *statfsp)
446{
447 uint64_t bsize;
448
449 bsize = statfsp->f_bsize / totalfsp->f_bsize;
450 totalfsp->f_blocks += statfsp->f_blocks * bsize;
451 totalfsp->f_bfree += statfsp->f_bfree * bsize;
452 totalfsp->f_bavail += statfsp->f_bavail * bsize;
453 totalfsp->f_files += statfsp->f_files;
454 totalfsp->f_ffree += statfsp->f_ffree;
455}
456
457/*
458 * Update the maximum field-width information in `mwp' based on
459 * the file system specified by `sfsp'.
460 */
461static void
462update_maxwidths(struct maxwidths *mwp, const struct statfs *sfsp)
463{
464 static long blocksize = 0;
465 int dummy;
466
467 if (blocksize == 0)
468 getbsize(&dummy, &blocksize);
469
470 mwp->mntfrom = imax(mwp->mntfrom, (int)strlen(sfsp->f_mntfromname));
471 mwp->total = imax(mwp->total, int64width(
472 fsbtoblk((int64_t)sfsp->f_blocks, sfsp->f_bsize, blocksize)));
473 mwp->used = imax(mwp->used,
474 int64width(fsbtoblk((int64_t)sfsp->f_blocks -
475 (int64_t)sfsp->f_bfree, sfsp->f_bsize, blocksize)));
476 mwp->avail = imax(mwp->avail, int64width(fsbtoblk(sfsp->f_bavail,
477 sfsp->f_bsize, blocksize)));
478 mwp->iused = imax(mwp->iused, int64width((int64_t)sfsp->f_files -
479 sfsp->f_ffree));
480 mwp->ifree = imax(mwp->ifree, int64width(sfsp->f_ffree));
481}
482
483/* Return the width in characters of the specified value. */
484static int
485int64width(int64_t val)
486{
487 int len;
488
489 len = 0;
490 /* Negative or zero values require one extra digit. */
491 if (val <= 0) {
492 val = -val;
493 len++;
494 }
495 while (val > 0) {
496 len++;
497 val /= 10;
498 }
499
500 return (len);
501}
502
503static void
504usage(void)
505{
506
507 (void)fprintf(stderr,
508"usage: df [-b | -g | -H | -h | -k | -m | -P] [-aciln] [-t type] [file | filesystem ...]\n");
509 exit(EX_USAGE);
510}
511
512static char *
513makenetvfslist(void)
514{
515 char *str, *strptr, **listptr;
516 struct xvfsconf *xvfsp, *keep_xvfsp;
517 size_t buflen;
518 int cnt, i, maxvfsconf;
519
520 if (sysctlbyname("vfs.conflist", NULL, &buflen, NULL, 0) < 0) {
521 warn("sysctl(vfs.conflist)");
522 return (NULL);
523 }
524 xvfsp = malloc(buflen);
525 if (xvfsp == NULL) {
526 warnx("malloc failed");
527 return (NULL);
528 }
529 keep_xvfsp = xvfsp;
530 if (sysctlbyname("vfs.conflist", xvfsp, &buflen, NULL, 0) < 0) {
531 warn("sysctl(vfs.conflist)");
532 free(keep_xvfsp);
533 return (NULL);
534 }
535 maxvfsconf = buflen / sizeof(struct xvfsconf);
536
537 if ((listptr = malloc(sizeof(char*) * maxvfsconf)) == NULL) {
538 warnx("malloc failed");
539 free(keep_xvfsp);
540 return (NULL);
541 }
542
543 for (cnt = 0, i = 0; i < maxvfsconf; i++) {
544 if (xvfsp->vfc_flags & VFCF_NETWORK) {
545 listptr[cnt++] = strdup(xvfsp->vfc_name);
546 if (listptr[cnt-1] == NULL) {
547 warnx("malloc failed");
548 free(listptr);
549 free(keep_xvfsp);
550 return (NULL);
551 }
552 }
553 xvfsp++;
554 }
555
556 if (cnt == 0 ||
557 (str = malloc(sizeof(char) * (32 * cnt + cnt + 2))) == NULL) {
558 if (cnt > 0)
559 warnx("malloc failed");
560 free(listptr);
561 free(keep_xvfsp);
562 return (NULL);
563 }
564
565 *str = 'n'; *(str + 1) = 'o';
566 for (i = 0, strptr = str + 2; i < cnt; i++, strptr++) {
567 strlcpy(strptr, listptr[i], 32);
568 strptr += strlen(listptr[i]);
569 *strptr = ',';
570 free(listptr[i]);
571 }
572 *(--strptr) = '\0';
573
574 free(keep_xvfsp);
575 free(listptr);
576 return (str);
577}
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