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