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 #include <sys/param.h>
38 #include <sys/stat.h>
39 #include <sys/mount.h>
40 #include <sys/sysctl.h>
41 #include <getopt.h>
42 #include <libutil.h>
43 #include <locale.h>
44 #include <stdint.h>
45 #include <stdio.h>
46 #include <stdlib.h>
47 #include <string.h>
48 #include <sysexits.h>
49 #include <unistd.h>
50 #include <libxo/xo.h>
51
52 #define UNITS_SI 1
53 #define UNITS_2 2
54
55 /* Maximum widths of various fields. */
56 struct maxwidths {
57 int mntfrom;
58 int fstype;
59 int total;
60 int used;
61 int avail;
62 int iused;
63 int ifree;
64 };
65
66 static void addstat(struct statfs *, struct statfs *);
67 static char *getmntpt(const char *);
68 static const char **makevfslist(char *fslist, int *skip);
69 static int checkvfsname(const char *vfsname, const char **vfslist, int skip);
70 static int checkvfsselected(char *);
71 static int int64width(int64_t);
72 static char *makenetvfslist(void);
73 static void prthuman(const struct statfs *, int64_t);
74 static void prthumanval(const char *, int64_t);
75 static intmax_t fsbtoblk(int64_t, uint64_t, u_long);
76 static void prtstat(struct statfs *, struct maxwidths *);
77 static size_t regetmntinfo(struct statfs **, long);
78 static void update_maxwidths(struct maxwidths *, const struct statfs *);
79 static void usage(void);
80
81 static __inline int
imax(int a,int b)82 imax(int a, int b)
83 {
84 return (a > b ? a : b);
85 }
86
87 static int aflag = 0, cflag, hflag, iflag, kflag, lflag = 0, nflag, Tflag;
88 static int thousands;
89 static int skipvfs_l, skipvfs_t;
90 static const char **vfslist_l, **vfslist_t;
91
92 static const struct option long_options[] =
93 {
94 { "si", no_argument, NULL, 'H' },
95 { NULL, no_argument, NULL, 0 },
96 };
97
98 int
main(int argc,char * argv[])99 main(int argc, char *argv[])
100 {
101 struct stat stbuf;
102 struct statfs statfsbuf, totalbuf;
103 struct maxwidths maxwidths;
104 struct statfs *mntbuf;
105 char *mntpt;
106 int i, mntsize;
107 int ch, rv;
108
109 (void)setlocale(LC_ALL, "");
110 memset(&maxwidths, 0, sizeof(maxwidths));
111 memset(&totalbuf, 0, sizeof(totalbuf));
112 totalbuf.f_bsize = DEV_BSIZE;
113 strlcpy(totalbuf.f_mntfromname, "total", MNAMELEN);
114
115 argc = xo_parse_args(argc, argv);
116 if (argc < 0)
117 exit(1);
118
119 while ((ch = getopt_long(argc, argv, "+abcgHhiklmnPt:T,", long_options,
120 NULL)) != -1)
121 switch (ch) {
122 case 'a':
123 aflag = 1;
124 break;
125 case 'b':
126 /* FALLTHROUGH */
127 case 'P':
128 /*
129 * POSIX specifically discusses the behavior of
130 * both -k and -P. It states that the blocksize should
131 * be set to 1024.
132 */
133 if (kflag) {
134 setenv("BLOCKSIZE", "1024", 1);
135 break;
136 }
137 setenv("BLOCKSIZE", "512", 1);
138 hflag = 0;
139 break;
140 case 'c':
141 cflag = 1;
142 break;
143 case 'g':
144 setenv("BLOCKSIZE", "1g", 1);
145 hflag = 0;
146 break;
147 case 'H':
148 hflag = UNITS_SI;
149 break;
150 case 'h':
151 hflag = UNITS_2;
152 break;
153 case 'i':
154 iflag = 1;
155 break;
156 case 'k':
157 kflag++;
158 setenv("BLOCKSIZE", "1k", 1);
159 hflag = 0;
160 break;
161 case 'l':
162 /* Ignore duplicate -l */
163 if (lflag)
164 break;
165 vfslist_l = makevfslist(makenetvfslist(), &skipvfs_l);
166 lflag = 1;
167 break;
168 case 'm':
169 setenv("BLOCKSIZE", "1m", 1);
170 hflag = 0;
171 break;
172 case 'n':
173 nflag = 1;
174 break;
175 case 't':
176 if (vfslist_t != NULL)
177 xo_errx(1, "only one -t option may be specified");
178 vfslist_t = makevfslist(optarg, &skipvfs_t);
179 break;
180 case 'T':
181 Tflag = 1;
182 break;
183 case ',':
184 thousands = 1;
185 break;
186 case '?':
187 default:
188 usage();
189 }
190 argc -= optind;
191 argv += optind;
192
193 rv = EXIT_SUCCESS;
194 if (!*argv) {
195 /* everything (modulo -t) */
196 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
197 mntsize = regetmntinfo(&mntbuf, mntsize);
198 } else {
199 /* just the filesystems specified on the command line */
200 mntbuf = malloc(argc * sizeof(*mntbuf));
201 if (mntbuf == NULL)
202 xo_err(1, "malloc()");
203 mntsize = 0;
204 /* continued in for loop below */
205 }
206
207 xo_open_container("storage-system-information");
208 xo_open_list("filesystem");
209
210 /* iterate through specified filesystems */
211 for (; *argv; argv++) {
212 if (stat(*argv, &stbuf) < 0) {
213 if ((mntpt = getmntpt(*argv)) == NULL) {
214 xo_warn("%s", *argv);
215 rv = EXIT_FAILURE;
216 continue;
217 }
218 } else if (S_ISCHR(stbuf.st_mode)) {
219 mntpt = getmntpt(*argv);
220 if (mntpt == NULL) {
221 xo_warnx("%s: not mounted", *argv);
222 rv = EXIT_FAILURE;
223 continue;
224 }
225 } else {
226 mntpt = *argv;
227 }
228
229 /*
230 * Statfs does not take a `wait' flag, so we cannot
231 * implement nflag here.
232 */
233 if (statfs(mntpt, &statfsbuf) < 0) {
234 xo_warn("%s", mntpt);
235 rv = EXIT_FAILURE;
236 continue;
237 }
238
239 /*
240 * Check to make sure the arguments we've been given are
241 * satisfied. Return an error if we have been asked to
242 * list a mount point that does not match the other args
243 * we've been given (-l, -t, etc.).
244 */
245 if (checkvfsselected(statfsbuf.f_fstypename) != 0) {
246 rv = EXIT_FAILURE;
247 continue;
248 }
249
250 /* the user asked for it, so ignore the ignore flag */
251 statfsbuf.f_flags &= ~MNT_IGNORE;
252
253 /* add to list */
254 mntbuf[mntsize++] = statfsbuf;
255 }
256
257 memset(&maxwidths, 0, sizeof(maxwidths));
258 for (i = 0; i < mntsize; i++) {
259 if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0) {
260 update_maxwidths(&maxwidths, &mntbuf[i]);
261 if (cflag)
262 addstat(&totalbuf, &mntbuf[i]);
263 }
264 }
265 for (i = 0; i < mntsize; i++)
266 if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0)
267 prtstat(&mntbuf[i], &maxwidths);
268
269 xo_close_list("filesystem");
270
271 if (cflag)
272 prtstat(&totalbuf, &maxwidths);
273
274 xo_close_container("storage-system-information");
275 if (xo_finish() < 0)
276 rv = EXIT_FAILURE;
277 exit(rv);
278 }
279
280 static char *
getmntpt(const char * name)281 getmntpt(const char *name)
282 {
283 size_t mntsize, i;
284 struct statfs *mntbuf;
285
286 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
287 for (i = 0; i < mntsize; i++) {
288 if (!strcmp(mntbuf[i].f_mntfromname, name))
289 return (mntbuf[i].f_mntonname);
290 }
291 return (NULL);
292 }
293
294 static const char **
makevfslist(char * fslist,int * skip)295 makevfslist(char *fslist, int *skip)
296 {
297 const char **av;
298 int i;
299 char *nextcp;
300
301 if (fslist == NULL)
302 return (NULL);
303 *skip = 0;
304 if (fslist[0] == 'n' && fslist[1] == 'o') {
305 fslist += 2;
306 *skip = 1;
307 }
308 for (i = 0, nextcp = fslist; *nextcp; nextcp++)
309 if (*nextcp == ',')
310 i++;
311 if ((av = malloc((size_t)(i + 2) * sizeof(char *))) == NULL) {
312 xo_warnx("malloc failed");
313 return (NULL);
314 }
315 nextcp = fslist;
316 i = 0;
317 av[i++] = nextcp;
318 while ((nextcp = strchr(nextcp, ',')) != NULL) {
319 *nextcp++ = '\0';
320 av[i++] = nextcp;
321 }
322 av[i++] = NULL;
323 return (av);
324 }
325
326 static int
checkvfsname(const char * vfsname,const char ** vfslist,int skip)327 checkvfsname(const char *vfsname, const char **vfslist, int skip)
328 {
329
330 if (vfslist == NULL)
331 return (0);
332 while (*vfslist != NULL) {
333 if (strcmp(vfsname, *vfslist) == 0)
334 return (skip);
335 ++vfslist;
336 }
337 return (!skip);
338 }
339
340 /*
341 * Without -l and -t option, all file system types are enabled.
342 * The -l option selects the local file systems, if present.
343 * A -t option modifies the selection by adding or removing further
344 * file system types, based on the argument that is passed.
345 */
346 static int
checkvfsselected(char * fstypename)347 checkvfsselected(char *fstypename)
348 {
349 int result;
350
351 if (vfslist_t) {
352 /* if -t option used then select passed types */
353 result = checkvfsname(fstypename, vfslist_t, skipvfs_t);
354 if (vfslist_l) {
355 /* if -l option then adjust selection */
356 if (checkvfsname(fstypename, vfslist_l, skipvfs_l) == skipvfs_t)
357 result = skipvfs_t;
358 }
359 } else {
360 /* no -t option then -l decides */
361 result = checkvfsname(fstypename, vfslist_l, skipvfs_l);
362 }
363 return (result);
364 }
365
366 /*
367 * Make a pass over the file system info in ``mntbuf'' filtering out
368 * file system types not in vfslist_{l,t} and possibly re-stating to get
369 * current (not cached) info. Returns the new count of valid statfs bufs.
370 */
371 static size_t
regetmntinfo(struct statfs ** mntbufp,long mntsize)372 regetmntinfo(struct statfs **mntbufp, long mntsize)
373 {
374 int error, i, j;
375 struct statfs *mntbuf;
376
377 if (vfslist_l == NULL && vfslist_t == NULL)
378 return (nflag ? mntsize : getmntinfo(mntbufp, MNT_WAIT));
379
380 mntbuf = *mntbufp;
381 for (j = 0, i = 0; i < mntsize; i++) {
382 if (checkvfsselected(mntbuf[i].f_fstypename) != 0)
383 continue;
384 /*
385 * XXX statfs(2) can fail for various reasons. It may be
386 * possible that the user does not have access to the
387 * pathname, if this happens, we will fall back on
388 * "stale" filesystem statistics.
389 */
390 error = statfs(mntbuf[i].f_mntonname, &mntbuf[j]);
391 if (nflag || error < 0)
392 if (i != j) {
393 if (error < 0)
394 xo_warnx("%s stats possibly stale",
395 mntbuf[i].f_mntonname);
396 mntbuf[j] = mntbuf[i];
397 }
398 j++;
399 }
400 return (j);
401 }
402
403 static void
prthuman(const struct statfs * sfsp,int64_t used)404 prthuman(const struct statfs *sfsp, int64_t used)
405 {
406
407 prthumanval(" {:blocks/%6s}", sfsp->f_blocks * sfsp->f_bsize);
408 prthumanval(" {:used/%6s}", used * sfsp->f_bsize);
409 prthumanval(" {:available/%6s}", sfsp->f_bavail * sfsp->f_bsize);
410 }
411
412 static void
prthumanval(const char * fmt,int64_t bytes)413 prthumanval(const char *fmt, int64_t bytes)
414 {
415 char buf[6];
416 int flags;
417
418 flags = HN_B | HN_NOSPACE | HN_DECIMAL;
419 if (hflag == UNITS_SI)
420 flags |= HN_DIVISOR_1000;
421
422 humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1),
423 bytes, "", HN_AUTOSCALE, flags);
424
425 xo_attr("value", "%lld", (long long) bytes);
426 xo_emit(fmt, buf);
427 }
428
429 /*
430 * Print an inode count in "human-readable" format.
431 */
432 static void
prthumanvalinode(const char * fmt,int64_t bytes)433 prthumanvalinode(const char *fmt, int64_t bytes)
434 {
435 char buf[6];
436 int flags;
437
438 flags = HN_NOSPACE | HN_DECIMAL | HN_DIVISOR_1000;
439
440 humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1),
441 bytes, "", HN_AUTOSCALE, flags);
442
443 xo_attr("value", "%lld", (long long) bytes);
444 xo_emit(fmt, buf);
445 }
446
447 /*
448 * Convert statfs returned file system size into BLOCKSIZE units.
449 */
450 static intmax_t
fsbtoblk(int64_t num,uint64_t fsbs,u_long bs)451 fsbtoblk(int64_t num, uint64_t fsbs, u_long bs)
452 {
453 return (num * (intmax_t) fsbs / (int64_t) bs);
454 }
455
456 /*
457 * Print out status about a file system.
458 */
459 static void
prtstat(struct statfs * sfsp,struct maxwidths * mwp)460 prtstat(struct statfs *sfsp, struct maxwidths *mwp)
461 {
462 static long blocksize;
463 static int headerlen, timesthrough = 0;
464 static const char *header;
465 int64_t used, availblks, inodes;
466 const char *format;
467
468 if (++timesthrough == 1) {
469 mwp->mntfrom = imax(mwp->mntfrom, (int)strlen("Filesystem"));
470 mwp->fstype = imax(mwp->fstype, (int)strlen("Type"));
471 if (thousands) { /* make space for commas */
472 mwp->total += (mwp->total - 1) / 3;
473 mwp->used += (mwp->used - 1) / 3;
474 mwp->avail += (mwp->avail - 1) / 3;
475 mwp->iused += (mwp->iused - 1) / 3;
476 mwp->ifree += (mwp->ifree - 1) / 3;
477 }
478 if (hflag) {
479 header = " Size";
480 mwp->total = mwp->used = mwp->avail =
481 (int)strlen(header);
482 } else {
483 header = getbsize(&headerlen, &blocksize);
484 mwp->total = imax(mwp->total, headerlen);
485 }
486 mwp->used = imax(mwp->used, (int)strlen("Used"));
487 mwp->avail = imax(mwp->avail, (int)strlen("Avail"));
488
489 xo_emit("{T:/%-*s}", mwp->mntfrom, "Filesystem");
490 if (Tflag)
491 xo_emit(" {T:/%-*s}", mwp->fstype, "Type");
492 xo_emit(" {T:/%*s} {T:/%*s} {T:/%*s} {T:Capacity}",
493 mwp->total, header,
494 mwp->used, "Used", mwp->avail, "Avail");
495 if (iflag) {
496 mwp->iused = imax(hflag ? 0 : mwp->iused,
497 (int)strlen(" iused"));
498 mwp->ifree = imax(hflag ? 0 : mwp->ifree,
499 (int)strlen("ifree"));
500 xo_emit(" {T:/%*s} {T:/%*s} {T:\%iused}",
501 mwp->iused - 2, "iused", mwp->ifree, "ifree");
502 }
503 xo_emit(" {T:Mounted on}\n");
504 }
505
506 xo_open_instance("filesystem");
507 /* Check for 0 block size. Can this happen? */
508 if (sfsp->f_bsize == 0) {
509 xo_warnx ("File system %s does not have a block size, assuming 512.",
510 sfsp->f_mntonname);
511 sfsp->f_bsize = 512;
512 }
513 xo_emit("{tk:name/%-*s}", mwp->mntfrom, sfsp->f_mntfromname);
514 if (Tflag)
515 xo_emit(" {:type/%-*s}", mwp->fstype, sfsp->f_fstypename);
516 used = sfsp->f_blocks - sfsp->f_bfree;
517 availblks = sfsp->f_bavail + used;
518 if (hflag) {
519 prthuman(sfsp, used);
520 } else {
521 if (thousands)
522 format = " {t:total-blocks/%*j'd} {t:used-blocks/%*j'd} "
523 "{t:available-blocks/%*j'd}";
524 else
525 format = " {t:total-blocks/%*jd} {t:used-blocks/%*jd} "
526 "{t:available-blocks/%*jd}";
527 xo_emit(format,
528 mwp->total, fsbtoblk(sfsp->f_blocks,
529 sfsp->f_bsize, blocksize),
530 mwp->used, fsbtoblk(used, sfsp->f_bsize, blocksize),
531 mwp->avail, fsbtoblk(sfsp->f_bavail,
532 sfsp->f_bsize, blocksize));
533 }
534 xo_emit(" {:used-percent/%5.0f}{U:%%}",
535 availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
536 if (iflag) {
537 inodes = sfsp->f_files;
538 used = inodes - sfsp->f_ffree;
539 if (hflag) {
540 xo_emit(" ");
541 prthumanvalinode(" {:inodes-used/%5s}", used);
542 prthumanvalinode(" {:inodes-free/%5s}", sfsp->f_ffree);
543 } else {
544 if (thousands)
545 format = " {:inodes-used/%*j'd} {:inodes-free/%*j'd}";
546 else
547 format = " {:inodes-used/%*jd} {:inodes-free/%*jd}";
548 xo_emit(format, mwp->iused, (intmax_t)used,
549 mwp->ifree, (intmax_t)sfsp->f_ffree);
550 }
551 if (inodes == 0)
552 xo_emit(" {:inodes-used-percent/ -}{U:} ");
553 else {
554 xo_emit(" {:inodes-used-percent/%4.0f}{U:%%} ",
555 (double)used / (double)inodes * 100.0);
556 }
557 } else
558 xo_emit(" ");
559 if (strncmp(sfsp->f_mntfromname, "total", MNAMELEN) != 0)
560 xo_emit(" {:mounted-on}", sfsp->f_mntonname);
561 xo_emit("\n");
562 xo_close_instance("filesystem");
563 }
564
565 static void
addstat(struct statfs * totalfsp,struct statfs * statfsp)566 addstat(struct statfs *totalfsp, struct statfs *statfsp)
567 {
568 uint64_t bsize;
569
570 bsize = statfsp->f_bsize / totalfsp->f_bsize;
571 totalfsp->f_blocks += statfsp->f_blocks * bsize;
572 totalfsp->f_bfree += statfsp->f_bfree * bsize;
573 totalfsp->f_bavail += statfsp->f_bavail * bsize;
574 totalfsp->f_files += statfsp->f_files;
575 totalfsp->f_ffree += statfsp->f_ffree;
576 }
577
578 /*
579 * Update the maximum field-width information in `mwp' based on
580 * the file system specified by `sfsp'.
581 */
582 static void
update_maxwidths(struct maxwidths * mwp,const struct statfs * sfsp)583 update_maxwidths(struct maxwidths *mwp, const struct statfs *sfsp)
584 {
585 static long blocksize = 0;
586 int dummy;
587
588 if (blocksize == 0)
589 getbsize(&dummy, &blocksize);
590
591 mwp->mntfrom = imax(mwp->mntfrom, (int)strlen(sfsp->f_mntfromname));
592 mwp->fstype = imax(mwp->fstype, (int)strlen(sfsp->f_fstypename));
593 mwp->total = imax(mwp->total, int64width(
594 fsbtoblk((int64_t)sfsp->f_blocks, sfsp->f_bsize, blocksize)));
595 mwp->used = imax(mwp->used,
596 int64width(fsbtoblk((int64_t)sfsp->f_blocks -
597 (int64_t)sfsp->f_bfree, sfsp->f_bsize, blocksize)));
598 mwp->avail = imax(mwp->avail, int64width(fsbtoblk(sfsp->f_bavail,
599 sfsp->f_bsize, blocksize)));
600 mwp->iused = imax(mwp->iused, int64width((int64_t)sfsp->f_files -
601 sfsp->f_ffree));
602 mwp->ifree = imax(mwp->ifree, int64width(sfsp->f_ffree));
603 }
604
605 /* Return the width in characters of the specified value. */
606 static int
int64width(int64_t val)607 int64width(int64_t val)
608 {
609 int len;
610
611 len = 0;
612 /* Negative or zero values require one extra digit. */
613 if (val <= 0) {
614 val = -val;
615 len++;
616 }
617 while (val > 0) {
618 len++;
619 val /= 10;
620 }
621
622 return (len);
623 }
624
625 static void
usage(void)626 usage(void)
627 {
628
629 xo_error(
630 "usage: df [-b | -g | -H | -h | -k | -m | -P] [-acilnT] [-t type] [-,]\n"
631 " [file | filesystem ...]\n");
632 exit(EX_USAGE);
633 }
634
635 static char *
makenetvfslist(void)636 makenetvfslist(void)
637 {
638 char *str, *strptr, **listptr;
639 struct xvfsconf *xvfsp, *keep_xvfsp;
640 size_t buflen;
641 int cnt, i, maxvfsconf;
642
643 if (sysctlbyname("vfs.conflist", NULL, &buflen, NULL, 0) < 0) {
644 xo_warn("sysctl(vfs.conflist)");
645 return (NULL);
646 }
647 xvfsp = malloc(buflen);
648 if (xvfsp == NULL) {
649 xo_warnx("malloc failed");
650 return (NULL);
651 }
652 keep_xvfsp = xvfsp;
653 if (sysctlbyname("vfs.conflist", xvfsp, &buflen, NULL, 0) < 0) {
654 xo_warn("sysctl(vfs.conflist)");
655 free(keep_xvfsp);
656 return (NULL);
657 }
658 maxvfsconf = buflen / sizeof(struct xvfsconf);
659
660 if ((listptr = malloc(sizeof(char*) * maxvfsconf)) == NULL) {
661 xo_warnx("malloc failed");
662 free(keep_xvfsp);
663 return (NULL);
664 }
665
666 for (cnt = 0, i = 0; i < maxvfsconf; i++) {
667 if (xvfsp->vfc_flags & VFCF_NETWORK) {
668 listptr[cnt++] = strdup(xvfsp->vfc_name);
669 if (listptr[cnt-1] == NULL) {
670 xo_warnx("malloc failed");
671 free(listptr);
672 free(keep_xvfsp);
673 return (NULL);
674 }
675 }
676 xvfsp++;
677 }
678
679 if (cnt == 0 ||
680 (str = malloc(sizeof(char) * (32 * cnt + cnt + 2))) == NULL) {
681 if (cnt > 0)
682 xo_warnx("malloc failed");
683 free(listptr);
684 free(keep_xvfsp);
685 return (NULL);
686 }
687
688 *str = 'n'; *(str + 1) = 'o';
689 for (i = 0, strptr = str + 2; i < cnt; i++, strptr++) {
690 strlcpy(strptr, listptr[i], 32);
691 strptr += strlen(listptr[i]);
692 *strptr = ',';
693 free(listptr[i]);
694 }
695 *(--strptr) = '\0';
696
697 free(keep_xvfsp);
698 free(listptr);
699 return (str);
700 }
701