1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1980, 1990, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
6 * (c) UNIX System Laboratories, Inc.
7 * All or some portions of this file are derived from material licensed
8 * to the University of California by American Telephone and Telegraph
9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
10 * the permission of UNIX System Laboratories, Inc.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37 #if 0
38 #ifndef lint
39 static const char copyright[] =
40 "@(#) Copyright (c) 1980, 1990, 1993, 1994\n\
41 The Regents of the University of California. All rights reserved.\n";
42 #endif /* not lint */
43
44 #ifndef lint
45 static char sccsid[] = "@(#)df.c 8.9 (Berkeley) 5/8/95";
46 #endif /* not lint */
47 #endif
48 #include <sys/cdefs.h>
49 #include <sys/param.h>
50 #include <sys/stat.h>
51 #include <sys/mount.h>
52 #include <sys/sysctl.h>
53 #include <getopt.h>
54 #include <libutil.h>
55 #include <locale.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 #include <libxo/xo.h>
63
64 #define UNITS_SI 1
65 #define UNITS_2 2
66
67 /* Maximum widths of various fields. */
68 struct maxwidths {
69 int mntfrom;
70 int fstype;
71 int total;
72 int used;
73 int avail;
74 int iused;
75 int ifree;
76 };
77
78 static void addstat(struct statfs *, struct statfs *);
79 static char *getmntpt(const char *);
80 static const char **makevfslist(char *fslist, int *skip);
81 static int checkvfsname(const char *vfsname, const char **vfslist, int skip);
82 static int checkvfsselected(char *);
83 static int int64width(int64_t);
84 static char *makenetvfslist(void);
85 static void prthuman(const struct statfs *, int64_t);
86 static void prthumanval(const char *, int64_t);
87 static intmax_t fsbtoblk(int64_t, uint64_t, u_long);
88 static void prtstat(struct statfs *, struct maxwidths *);
89 static size_t regetmntinfo(struct statfs **, long);
90 static void update_maxwidths(struct maxwidths *, const struct statfs *);
91 static void usage(void);
92
93 static __inline int
imax(int a,int b)94 imax(int a, int b)
95 {
96 return (a > b ? a : b);
97 }
98
99 static int aflag = 0, cflag, hflag, iflag, kflag, lflag = 0, nflag, Tflag;
100 static int thousands;
101 static int skipvfs_l, skipvfs_t;
102 static const char **vfslist_l, **vfslist_t;
103
104 static const struct option long_options[] =
105 {
106 { "si", no_argument, NULL, 'H' },
107 { NULL, no_argument, NULL, 0 },
108 };
109
110 int
main(int argc,char * argv[])111 main(int argc, char *argv[])
112 {
113 struct stat stbuf;
114 struct statfs statfsbuf, totalbuf;
115 struct maxwidths maxwidths;
116 struct statfs *mntbuf;
117 char *mntpt;
118 int i, mntsize;
119 int ch, rv;
120
121 (void)setlocale(LC_ALL, "");
122 memset(&maxwidths, 0, sizeof(maxwidths));
123 memset(&totalbuf, 0, sizeof(totalbuf));
124 totalbuf.f_bsize = DEV_BSIZE;
125 strlcpy(totalbuf.f_mntfromname, "total", MNAMELEN);
126
127 argc = xo_parse_args(argc, argv);
128 if (argc < 0)
129 exit(1);
130
131 while ((ch = getopt_long(argc, argv, "+abcgHhiklmnPt:T,", long_options,
132 NULL)) != -1)
133 switch (ch) {
134 case 'a':
135 aflag = 1;
136 break;
137 case 'b':
138 /* FALLTHROUGH */
139 case 'P':
140 /*
141 * POSIX specifically discusses the behavior of
142 * both -k and -P. It states that the blocksize should
143 * be set to 1024. Thus, if this occurs, simply break
144 * rather than clobbering the old blocksize.
145 */
146 if (kflag)
147 break;
148 setenv("BLOCKSIZE", "512", 1);
149 hflag = 0;
150 break;
151 case 'c':
152 cflag = 1;
153 break;
154 case 'g':
155 setenv("BLOCKSIZE", "1g", 1);
156 hflag = 0;
157 break;
158 case 'H':
159 hflag = UNITS_SI;
160 break;
161 case 'h':
162 hflag = UNITS_2;
163 break;
164 case 'i':
165 iflag = 1;
166 break;
167 case 'k':
168 kflag++;
169 setenv("BLOCKSIZE", "1024", 1);
170 hflag = 0;
171 break;
172 case 'l':
173 /* Ignore duplicate -l */
174 if (lflag)
175 break;
176 vfslist_l = makevfslist(makenetvfslist(), &skipvfs_l);
177 lflag = 1;
178 break;
179 case 'm':
180 setenv("BLOCKSIZE", "1m", 1);
181 hflag = 0;
182 break;
183 case 'n':
184 nflag = 1;
185 break;
186 case 't':
187 if (vfslist_t != NULL)
188 xo_errx(1, "only one -t option may be specified");
189 vfslist_t = makevfslist(optarg, &skipvfs_t);
190 break;
191 case 'T':
192 Tflag = 1;
193 break;
194 case ',':
195 thousands = 1;
196 break;
197 case '?':
198 default:
199 usage();
200 }
201 argc -= optind;
202 argv += optind;
203
204 rv = EXIT_SUCCESS;
205 if (!*argv) {
206 /* everything (modulo -t) */
207 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
208 mntsize = regetmntinfo(&mntbuf, mntsize);
209 } else {
210 /* just the filesystems specified on the command line */
211 mntbuf = malloc(argc * sizeof(*mntbuf));
212 if (mntbuf == NULL)
213 xo_err(1, "malloc()");
214 mntsize = 0;
215 /* continued in for loop below */
216 }
217
218 xo_open_container("storage-system-information");
219 xo_open_list("filesystem");
220
221 /* iterate through specified filesystems */
222 for (; *argv; argv++) {
223 if (stat(*argv, &stbuf) < 0) {
224 if ((mntpt = getmntpt(*argv)) == NULL) {
225 xo_warn("%s", *argv);
226 rv = EXIT_FAILURE;
227 continue;
228 }
229 } else if (S_ISCHR(stbuf.st_mode)) {
230 mntpt = getmntpt(*argv);
231 if (mntpt == NULL) {
232 xo_warnx("%s: not mounted", *argv);
233 rv = EXIT_FAILURE;
234 continue;
235 }
236 } else {
237 mntpt = *argv;
238 }
239
240 /*
241 * Statfs does not take a `wait' flag, so we cannot
242 * implement nflag here.
243 */
244 if (statfs(mntpt, &statfsbuf) < 0) {
245 xo_warn("%s", mntpt);
246 rv = EXIT_FAILURE;
247 continue;
248 }
249
250 /*
251 * Check to make sure the arguments we've been given are
252 * satisfied. Return an error if we have been asked to
253 * list a mount point that does not match the other args
254 * we've been given (-l, -t, etc.).
255 */
256 if (checkvfsselected(statfsbuf.f_fstypename) != 0) {
257 rv = EXIT_FAILURE;
258 continue;
259 }
260
261 /* the user asked for it, so ignore the ignore flag */
262 statfsbuf.f_flags &= ~MNT_IGNORE;
263
264 /* add to list */
265 mntbuf[mntsize++] = statfsbuf;
266 }
267
268 memset(&maxwidths, 0, sizeof(maxwidths));
269 for (i = 0; i < mntsize; i++) {
270 if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0) {
271 update_maxwidths(&maxwidths, &mntbuf[i]);
272 if (cflag)
273 addstat(&totalbuf, &mntbuf[i]);
274 }
275 }
276 for (i = 0; i < mntsize; i++)
277 if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0)
278 prtstat(&mntbuf[i], &maxwidths);
279
280 xo_close_list("filesystem");
281
282 if (cflag)
283 prtstat(&totalbuf, &maxwidths);
284
285 xo_close_container("storage-system-information");
286 if (xo_finish() < 0)
287 rv = EXIT_FAILURE;
288 exit(rv);
289 }
290
291 static char *
getmntpt(const char * name)292 getmntpt(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 (NULL);
303 }
304
305 static const char **
makevfslist(char * fslist,int * skip)306 makevfslist(char *fslist, int *skip)
307 {
308 const char **av;
309 int i;
310 char *nextcp;
311
312 if (fslist == NULL)
313 return (NULL);
314 *skip = 0;
315 if (fslist[0] == 'n' && fslist[1] == 'o') {
316 fslist += 2;
317 *skip = 1;
318 }
319 for (i = 0, nextcp = fslist; *nextcp; nextcp++)
320 if (*nextcp == ',')
321 i++;
322 if ((av = malloc((size_t)(i + 2) * sizeof(char *))) == NULL) {
323 xo_warnx("malloc failed");
324 return (NULL);
325 }
326 nextcp = fslist;
327 i = 0;
328 av[i++] = nextcp;
329 while ((nextcp = strchr(nextcp, ',')) != NULL) {
330 *nextcp++ = '\0';
331 av[i++] = nextcp;
332 }
333 av[i++] = NULL;
334 return (av);
335 }
336
337 static int
checkvfsname(const char * vfsname,const char ** vfslist,int skip)338 checkvfsname(const char *vfsname, const char **vfslist, int skip)
339 {
340
341 if (vfslist == NULL)
342 return (0);
343 while (*vfslist != NULL) {
344 if (strcmp(vfsname, *vfslist) == 0)
345 return (skip);
346 ++vfslist;
347 }
348 return (!skip);
349 }
350
351 /*
352 * Without -l and -t option, all file system types are enabled.
353 * The -l option selects the local file systems, if present.
354 * A -t option modifies the selection by adding or removing further
355 * file system types, based on the argument that is passed.
356 */
357 static int
checkvfsselected(char * fstypename)358 checkvfsselected(char *fstypename)
359 {
360 int result;
361
362 if (vfslist_t) {
363 /* if -t option used then select passed types */
364 result = checkvfsname(fstypename, vfslist_t, skipvfs_t);
365 if (vfslist_l) {
366 /* if -l option then adjust selection */
367 if (checkvfsname(fstypename, vfslist_l, skipvfs_l) == skipvfs_t)
368 result = skipvfs_t;
369 }
370 } else {
371 /* no -t option then -l decides */
372 result = checkvfsname(fstypename, vfslist_l, skipvfs_l);
373 }
374 return (result);
375 }
376
377 /*
378 * Make a pass over the file system info in ``mntbuf'' filtering out
379 * file system types not in vfslist_{l,t} and possibly re-stating to get
380 * current (not cached) info. Returns the new count of valid statfs bufs.
381 */
382 static size_t
regetmntinfo(struct statfs ** mntbufp,long mntsize)383 regetmntinfo(struct statfs **mntbufp, long mntsize)
384 {
385 int error, i, j;
386 struct statfs *mntbuf;
387
388 if (vfslist_l == NULL && vfslist_t == NULL)
389 return (nflag ? mntsize : getmntinfo(mntbufp, MNT_WAIT));
390
391 mntbuf = *mntbufp;
392 for (j = 0, i = 0; i < mntsize; i++) {
393 if (checkvfsselected(mntbuf[i].f_fstypename) != 0)
394 continue;
395 /*
396 * XXX statfs(2) can fail for various reasons. It may be
397 * possible that the user does not have access to the
398 * pathname, if this happens, we will fall back on
399 * "stale" filesystem statistics.
400 */
401 error = statfs(mntbuf[i].f_mntonname, &mntbuf[j]);
402 if (nflag || error < 0)
403 if (i != j) {
404 if (error < 0)
405 xo_warnx("%s stats possibly stale",
406 mntbuf[i].f_mntonname);
407 mntbuf[j] = mntbuf[i];
408 }
409 j++;
410 }
411 return (j);
412 }
413
414 static void
prthuman(const struct statfs * sfsp,int64_t used)415 prthuman(const struct statfs *sfsp, int64_t used)
416 {
417
418 prthumanval(" {:blocks/%6s}", sfsp->f_blocks * sfsp->f_bsize);
419 prthumanval(" {:used/%6s}", used * sfsp->f_bsize);
420 prthumanval(" {:available/%6s}", sfsp->f_bavail * sfsp->f_bsize);
421 }
422
423 static void
prthumanval(const char * fmt,int64_t bytes)424 prthumanval(const char *fmt, int64_t bytes)
425 {
426 char buf[6];
427 int flags;
428
429 flags = HN_B | HN_NOSPACE | HN_DECIMAL;
430 if (hflag == UNITS_SI)
431 flags |= HN_DIVISOR_1000;
432
433 humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1),
434 bytes, "", HN_AUTOSCALE, flags);
435
436 xo_attr("value", "%lld", (long long) bytes);
437 xo_emit(fmt, buf);
438 }
439
440 /*
441 * Print an inode count in "human-readable" format.
442 */
443 static void
prthumanvalinode(const char * fmt,int64_t bytes)444 prthumanvalinode(const char *fmt, int64_t bytes)
445 {
446 char buf[6];
447 int flags;
448
449 flags = HN_NOSPACE | HN_DECIMAL | HN_DIVISOR_1000;
450
451 humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1),
452 bytes, "", HN_AUTOSCALE, flags);
453
454 xo_attr("value", "%lld", (long long) bytes);
455 xo_emit(fmt, buf);
456 }
457
458 /*
459 * Convert statfs returned file system size into BLOCKSIZE units.
460 */
461 static intmax_t
fsbtoblk(int64_t num,uint64_t fsbs,u_long bs)462 fsbtoblk(int64_t num, uint64_t fsbs, u_long bs)
463 {
464 return (num * (intmax_t) fsbs / (int64_t) bs);
465 }
466
467 /*
468 * Print out status about a file system.
469 */
470 static void
prtstat(struct statfs * sfsp,struct maxwidths * mwp)471 prtstat(struct statfs *sfsp, struct maxwidths *mwp)
472 {
473 static long blocksize;
474 static int headerlen, timesthrough = 0;
475 static const char *header;
476 int64_t used, availblks, inodes;
477 const char *format;
478
479 if (++timesthrough == 1) {
480 mwp->mntfrom = imax(mwp->mntfrom, (int)strlen("Filesystem"));
481 mwp->fstype = imax(mwp->fstype, (int)strlen("Type"));
482 if (thousands) { /* make space for commas */
483 mwp->total += (mwp->total - 1) / 3;
484 mwp->used += (mwp->used - 1) / 3;
485 mwp->avail += (mwp->avail - 1) / 3;
486 mwp->iused += (mwp->iused - 1) / 3;
487 mwp->ifree += (mwp->ifree - 1) / 3;
488 }
489 if (hflag) {
490 header = " Size";
491 mwp->total = mwp->used = mwp->avail =
492 (int)strlen(header);
493 } else {
494 header = getbsize(&headerlen, &blocksize);
495 mwp->total = imax(mwp->total, headerlen);
496 }
497 mwp->used = imax(mwp->used, (int)strlen("Used"));
498 mwp->avail = imax(mwp->avail, (int)strlen("Avail"));
499
500 xo_emit("{T:/%-*s}", mwp->mntfrom, "Filesystem");
501 if (Tflag)
502 xo_emit(" {T:/%-*s}", mwp->fstype, "Type");
503 xo_emit(" {T:/%*s} {T:/%*s} {T:/%*s} {T:Capacity}",
504 mwp->total, header,
505 mwp->used, "Used", mwp->avail, "Avail");
506 if (iflag) {
507 mwp->iused = imax(hflag ? 0 : mwp->iused,
508 (int)strlen(" iused"));
509 mwp->ifree = imax(hflag ? 0 : mwp->ifree,
510 (int)strlen("ifree"));
511 xo_emit(" {T:/%*s} {T:/%*s} {T:\%iused}",
512 mwp->iused - 2, "iused", mwp->ifree, "ifree");
513 }
514 xo_emit(" {T:Mounted on}\n");
515 }
516
517 xo_open_instance("filesystem");
518 /* Check for 0 block size. Can this happen? */
519 if (sfsp->f_bsize == 0) {
520 xo_warnx ("File system %s does not have a block size, assuming 512.",
521 sfsp->f_mntonname);
522 sfsp->f_bsize = 512;
523 }
524 xo_emit("{tk:name/%-*s}", mwp->mntfrom, sfsp->f_mntfromname);
525 if (Tflag)
526 xo_emit(" {:type/%-*s}", mwp->fstype, sfsp->f_fstypename);
527 used = sfsp->f_blocks - sfsp->f_bfree;
528 availblks = sfsp->f_bavail + used;
529 if (hflag) {
530 prthuman(sfsp, used);
531 } else {
532 if (thousands)
533 format = " {t:total-blocks/%*j'd} {t:used-blocks/%*j'd} "
534 "{t:available-blocks/%*j'd}";
535 else
536 format = " {t:total-blocks/%*jd} {t:used-blocks/%*jd} "
537 "{t:available-blocks/%*jd}";
538 xo_emit(format,
539 mwp->total, fsbtoblk(sfsp->f_blocks,
540 sfsp->f_bsize, blocksize),
541 mwp->used, fsbtoblk(used, sfsp->f_bsize, blocksize),
542 mwp->avail, fsbtoblk(sfsp->f_bavail,
543 sfsp->f_bsize, blocksize));
544 }
545 xo_emit(" {:used-percent/%5.0f}{U:%%}",
546 availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
547 if (iflag) {
548 inodes = sfsp->f_files;
549 used = inodes - sfsp->f_ffree;
550 if (hflag) {
551 xo_emit(" ");
552 prthumanvalinode(" {:inodes-used/%5s}", used);
553 prthumanvalinode(" {:inodes-free/%5s}", sfsp->f_ffree);
554 } else {
555 if (thousands)
556 format = " {:inodes-used/%*j'd} {:inodes-free/%*j'd}";
557 else
558 format = " {:inodes-used/%*jd} {:inodes-free/%*jd}";
559 xo_emit(format, mwp->iused, (intmax_t)used,
560 mwp->ifree, (intmax_t)sfsp->f_ffree);
561 }
562 if (inodes == 0)
563 xo_emit(" {:inodes-used-percent/ -}{U:} ");
564 else {
565 xo_emit(" {:inodes-used-percent/%4.0f}{U:%%} ",
566 (double)used / (double)inodes * 100.0);
567 }
568 } else
569 xo_emit(" ");
570 if (strncmp(sfsp->f_mntfromname, "total", MNAMELEN) != 0)
571 xo_emit(" {:mounted-on}", sfsp->f_mntonname);
572 xo_emit("\n");
573 xo_close_instance("filesystem");
574 }
575
576 static void
addstat(struct statfs * totalfsp,struct statfs * statfsp)577 addstat(struct statfs *totalfsp, struct statfs *statfsp)
578 {
579 uint64_t bsize;
580
581 bsize = statfsp->f_bsize / totalfsp->f_bsize;
582 totalfsp->f_blocks += statfsp->f_blocks * bsize;
583 totalfsp->f_bfree += statfsp->f_bfree * bsize;
584 totalfsp->f_bavail += statfsp->f_bavail * bsize;
585 totalfsp->f_files += statfsp->f_files;
586 totalfsp->f_ffree += statfsp->f_ffree;
587 }
588
589 /*
590 * Update the maximum field-width information in `mwp' based on
591 * the file system specified by `sfsp'.
592 */
593 static void
update_maxwidths(struct maxwidths * mwp,const struct statfs * sfsp)594 update_maxwidths(struct maxwidths *mwp, const struct statfs *sfsp)
595 {
596 static long blocksize = 0;
597 int dummy;
598
599 if (blocksize == 0)
600 getbsize(&dummy, &blocksize);
601
602 mwp->mntfrom = imax(mwp->mntfrom, (int)strlen(sfsp->f_mntfromname));
603 mwp->fstype = imax(mwp->fstype, (int)strlen(sfsp->f_fstypename));
604 mwp->total = imax(mwp->total, int64width(
605 fsbtoblk((int64_t)sfsp->f_blocks, sfsp->f_bsize, blocksize)));
606 mwp->used = imax(mwp->used,
607 int64width(fsbtoblk((int64_t)sfsp->f_blocks -
608 (int64_t)sfsp->f_bfree, sfsp->f_bsize, blocksize)));
609 mwp->avail = imax(mwp->avail, int64width(fsbtoblk(sfsp->f_bavail,
610 sfsp->f_bsize, blocksize)));
611 mwp->iused = imax(mwp->iused, int64width((int64_t)sfsp->f_files -
612 sfsp->f_ffree));
613 mwp->ifree = imax(mwp->ifree, int64width(sfsp->f_ffree));
614 }
615
616 /* Return the width in characters of the specified value. */
617 static int
int64width(int64_t val)618 int64width(int64_t val)
619 {
620 int len;
621
622 len = 0;
623 /* Negative or zero values require one extra digit. */
624 if (val <= 0) {
625 val = -val;
626 len++;
627 }
628 while (val > 0) {
629 len++;
630 val /= 10;
631 }
632
633 return (len);
634 }
635
636 static void
usage(void)637 usage(void)
638 {
639
640 xo_error(
641 "usage: df [-b | -g | -H | -h | -k | -m | -P] [-acilnT] [-t type] [-,]\n"
642 " [file | filesystem ...]\n");
643 exit(EX_USAGE);
644 }
645
646 static char *
makenetvfslist(void)647 makenetvfslist(void)
648 {
649 char *str, *strptr, **listptr;
650 struct xvfsconf *xvfsp, *keep_xvfsp;
651 size_t buflen;
652 int cnt, i, maxvfsconf;
653
654 if (sysctlbyname("vfs.conflist", NULL, &buflen, NULL, 0) < 0) {
655 xo_warn("sysctl(vfs.conflist)");
656 return (NULL);
657 }
658 xvfsp = malloc(buflen);
659 if (xvfsp == NULL) {
660 xo_warnx("malloc failed");
661 return (NULL);
662 }
663 keep_xvfsp = xvfsp;
664 if (sysctlbyname("vfs.conflist", xvfsp, &buflen, NULL, 0) < 0) {
665 xo_warn("sysctl(vfs.conflist)");
666 free(keep_xvfsp);
667 return (NULL);
668 }
669 maxvfsconf = buflen / sizeof(struct xvfsconf);
670
671 if ((listptr = malloc(sizeof(char*) * maxvfsconf)) == NULL) {
672 xo_warnx("malloc failed");
673 free(keep_xvfsp);
674 return (NULL);
675 }
676
677 for (cnt = 0, i = 0; i < maxvfsconf; i++) {
678 if (xvfsp->vfc_flags & VFCF_NETWORK) {
679 listptr[cnt++] = strdup(xvfsp->vfc_name);
680 if (listptr[cnt-1] == NULL) {
681 xo_warnx("malloc failed");
682 free(listptr);
683 free(keep_xvfsp);
684 return (NULL);
685 }
686 }
687 xvfsp++;
688 }
689
690 if (cnt == 0 ||
691 (str = malloc(sizeof(char) * (32 * cnt + cnt + 2))) == NULL) {
692 if (cnt > 0)
693 xo_warnx("malloc failed");
694 free(listptr);
695 free(keep_xvfsp);
696 return (NULL);
697 }
698
699 *str = 'n'; *(str + 1) = 'o';
700 for (i = 0, strptr = str + 2; i < cnt; i++, strptr++) {
701 strlcpy(strptr, listptr[i], 32);
702 strptr += strlen(listptr[i]);
703 *strptr = ',';
704 free(listptr[i]);
705 }
706 *(--strptr) = '\0';
707
708 free(keep_xvfsp);
709 free(listptr);
710 return (str);
711 }
712