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 __FBSDID("$FreeBSD$");
50
51 #include <sys/param.h>
52 #include <sys/stat.h>
53 #include <sys/mount.h>
54 #include <sys/sysctl.h>
55 #include <err.h>
56 #include <getopt.h>
57 #include <libutil.h>
58 #include <locale.h>
59 #include <stdint.h>
60 #include <stdio.h>
61 #include <stdlib.h>
62 #include <string.h>
63 #include <sysexits.h>
64 #include <unistd.h>
65 #include <libxo/xo.h>
66
67 #define UNITS_SI 1
68 #define UNITS_2 2
69
70 /* Maximum widths of various fields. */
71 struct maxwidths {
72 int mntfrom;
73 int fstype;
74 int total;
75 int used;
76 int avail;
77 int iused;
78 int ifree;
79 };
80
81 static void addstat(struct statfs *, struct statfs *);
82 static char *getmntpt(const char *);
83 static const char **makevfslist(char *fslist, int *skip);
84 static int checkvfsname(const char *vfsname, const char **vfslist, int skip);
85 static int checkvfsselected(char *);
86 static int int64width(int64_t);
87 static char *makenetvfslist(void);
88 static void prthuman(const struct statfs *, int64_t);
89 static void prthumanval(const char *, int64_t);
90 static intmax_t fsbtoblk(int64_t, uint64_t, u_long);
91 static void prtstat(struct statfs *, struct maxwidths *);
92 static size_t regetmntinfo(struct statfs **, long);
93 static void update_maxwidths(struct maxwidths *, const struct statfs *);
94 static void usage(void);
95
96 static __inline int
imax(int a,int b)97 imax(int a, int b)
98 {
99 return (a > b ? a : b);
100 }
101
102 static int aflag = 0, cflag, hflag, iflag, kflag, lflag = 0, nflag, Tflag;
103 static int thousands;
104 static int skipvfs_l, skipvfs_t;
105 static const char **vfslist_l, **vfslist_t;
106
107 static const struct option long_options[] =
108 {
109 { "si", no_argument, NULL, 'H' },
110 { NULL, no_argument, NULL, 0 },
111 };
112
113 int
main(int argc,char * argv[])114 main(int argc, char *argv[])
115 {
116 struct stat stbuf;
117 struct statfs statfsbuf, totalbuf;
118 struct maxwidths maxwidths;
119 struct statfs *mntbuf;
120 char *mntpt;
121 int i, mntsize;
122 int ch, rv;
123
124 (void)setlocale(LC_ALL, "");
125 memset(&maxwidths, 0, sizeof(maxwidths));
126 memset(&totalbuf, 0, sizeof(totalbuf));
127 totalbuf.f_bsize = DEV_BSIZE;
128 strlcpy(totalbuf.f_mntfromname, "total", MNAMELEN);
129
130 argc = xo_parse_args(argc, argv);
131 if (argc < 0)
132 exit(1);
133
134 while ((ch = getopt_long(argc, argv, "+abcgHhiklmnPt:T,", long_options,
135 NULL)) != -1)
136 switch (ch) {
137 case 'a':
138 aflag = 1;
139 break;
140 case 'b':
141 /* FALLTHROUGH */
142 case 'P':
143 /*
144 * POSIX specifically discusses the behavior of
145 * both -k and -P. It states that the blocksize should
146 * be set to 1024. Thus, if this occurs, simply break
147 * rather than clobbering the old blocksize.
148 */
149 if (kflag)
150 break;
151 setenv("BLOCKSIZE", "512", 1);
152 hflag = 0;
153 break;
154 case 'c':
155 cflag = 1;
156 break;
157 case 'g':
158 setenv("BLOCKSIZE", "1g", 1);
159 hflag = 0;
160 break;
161 case 'H':
162 hflag = UNITS_SI;
163 break;
164 case 'h':
165 hflag = UNITS_2;
166 break;
167 case 'i':
168 iflag = 1;
169 break;
170 case 'k':
171 kflag++;
172 setenv("BLOCKSIZE", "1024", 1);
173 hflag = 0;
174 break;
175 case 'l':
176 /* Ignore duplicate -l */
177 if (lflag)
178 break;
179 vfslist_l = makevfslist(makenetvfslist(), &skipvfs_l);
180 lflag = 1;
181 break;
182 case 'm':
183 setenv("BLOCKSIZE", "1m", 1);
184 hflag = 0;
185 break;
186 case 'n':
187 nflag = 1;
188 break;
189 case 't':
190 if (vfslist_t != NULL)
191 xo_errx(1, "only one -t option may be specified");
192 vfslist_t = makevfslist(optarg, &skipvfs_t);
193 break;
194 case 'T':
195 Tflag = 1;
196 break;
197 case ',':
198 thousands = 1;
199 break;
200 case '?':
201 default:
202 usage();
203 }
204 argc -= optind;
205 argv += optind;
206
207 rv = 0;
208 if (!*argv) {
209 /* everything (modulo -t) */
210 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
211 mntsize = regetmntinfo(&mntbuf, mntsize);
212 } else {
213 /* just the filesystems specified on the command line */
214 mntbuf = malloc(argc * sizeof(*mntbuf));
215 if (mntbuf == NULL)
216 xo_err(1, "malloc()");
217 mntsize = 0;
218 /* continued in for loop below */
219 }
220
221 xo_open_container("storage-system-information");
222 xo_open_list("filesystem");
223
224 /* iterate through specified filesystems */
225 for (; *argv; argv++) {
226 if (stat(*argv, &stbuf) < 0) {
227 if ((mntpt = getmntpt(*argv)) == NULL) {
228 xo_warn("%s", *argv);
229 rv = 1;
230 continue;
231 }
232 } else if (S_ISCHR(stbuf.st_mode)) {
233 mntpt = getmntpt(*argv);
234 if (mntpt == NULL) {
235 xo_warnx("%s: not mounted", *argv);
236 rv = 1;
237 continue;
238 }
239 } else {
240 mntpt = *argv;
241 }
242
243 /*
244 * Statfs does not take a `wait' flag, so we cannot
245 * implement nflag here.
246 */
247 if (statfs(mntpt, &statfsbuf) < 0) {
248 xo_warn("%s", mntpt);
249 rv = 1;
250 continue;
251 }
252
253 /*
254 * Check to make sure the arguments we've been given are
255 * satisfied. Return an error if we have been asked to
256 * list a mount point that does not match the other args
257 * we've been given (-l, -t, etc.).
258 */
259 if (checkvfsselected(statfsbuf.f_fstypename) != 0) {
260 rv = 1;
261 continue;
262 }
263
264 /* the user asked for it, so ignore the ignore flag */
265 statfsbuf.f_flags &= ~MNT_IGNORE;
266
267 /* add to list */
268 mntbuf[mntsize++] = statfsbuf;
269 }
270
271 memset(&maxwidths, 0, sizeof(maxwidths));
272 for (i = 0; i < mntsize; i++) {
273 if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0) {
274 update_maxwidths(&maxwidths, &mntbuf[i]);
275 if (cflag)
276 addstat(&totalbuf, &mntbuf[i]);
277 }
278 }
279 for (i = 0; i < mntsize; i++)
280 if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0)
281 prtstat(&mntbuf[i], &maxwidths);
282
283 xo_close_list("filesystem");
284
285 if (cflag)
286 prtstat(&totalbuf, &maxwidths);
287
288 xo_close_container("storage-system-information");
289 xo_finish();
290 exit(rv);
291 }
292
293 static char *
getmntpt(const char * name)294 getmntpt(const char *name)
295 {
296 size_t mntsize, i;
297 struct statfs *mntbuf;
298
299 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
300 for (i = 0; i < mntsize; i++) {
301 if (!strcmp(mntbuf[i].f_mntfromname, name))
302 return (mntbuf[i].f_mntonname);
303 }
304 return (NULL);
305 }
306
307 static const char **
makevfslist(char * fslist,int * skip)308 makevfslist(char *fslist, int *skip)
309 {
310 const char **av;
311 int i;
312 char *nextcp;
313
314 if (fslist == NULL)
315 return (NULL);
316 *skip = 0;
317 if (fslist[0] == 'n' && fslist[1] == 'o') {
318 fslist += 2;
319 *skip = 1;
320 }
321 for (i = 0, nextcp = fslist; *nextcp; nextcp++)
322 if (*nextcp == ',')
323 i++;
324 if ((av = malloc((size_t)(i + 2) * sizeof(char *))) == NULL) {
325 warnx("malloc failed");
326 return (NULL);
327 }
328 nextcp = fslist;
329 i = 0;
330 av[i++] = nextcp;
331 while ((nextcp = strchr(nextcp, ',')) != NULL) {
332 *nextcp++ = '\0';
333 av[i++] = nextcp;
334 }
335 av[i++] = NULL;
336 return (av);
337 }
338
339 static int
checkvfsname(const char * vfsname,const char ** vfslist,int skip)340 checkvfsname(const char *vfsname, const char **vfslist, int skip)
341 {
342
343 if (vfslist == NULL)
344 return (0);
345 while (*vfslist != NULL) {
346 if (strcmp(vfsname, *vfslist) == 0)
347 return (skip);
348 ++vfslist;
349 }
350 return (!skip);
351 }
352
353 /*
354 * Without -l and -t option, all file system types are enabled.
355 * The -l option selects the local file systems, if present.
356 * A -t option modifies the selection by adding or removing further
357 * file system types, based on the argument that is passed.
358 */
359 static int
checkvfsselected(char * fstypename)360 checkvfsselected(char *fstypename)
361 {
362 int result;
363
364 if (vfslist_t) {
365 /* if -t option used then select passed types */
366 result = checkvfsname(fstypename, vfslist_t, skipvfs_t);
367 if (vfslist_l) {
368 /* if -l option then adjust selection */
369 if (checkvfsname(fstypename, vfslist_l, skipvfs_l) == skipvfs_t)
370 result = skipvfs_t;
371 }
372 } else {
373 /* no -t option then -l decides */
374 result = checkvfsname(fstypename, vfslist_l, skipvfs_l);
375 }
376 return (result);
377 }
378
379 /*
380 * Make a pass over the file system info in ``mntbuf'' filtering out
381 * file system types not in vfslist_{l,t} and possibly re-stating to get
382 * current (not cached) info. Returns the new count of valid statfs bufs.
383 */
384 static size_t
regetmntinfo(struct statfs ** mntbufp,long mntsize)385 regetmntinfo(struct statfs **mntbufp, long mntsize)
386 {
387 int error, i, j;
388 struct statfs *mntbuf;
389
390 if (vfslist_l == NULL && vfslist_t == NULL)
391 return (nflag ? mntsize : getmntinfo(mntbufp, MNT_WAIT));
392
393 mntbuf = *mntbufp;
394 for (j = 0, i = 0; i < mntsize; i++) {
395 if (checkvfsselected(mntbuf[i].f_fstypename) != 0)
396 continue;
397 /*
398 * XXX statfs(2) can fail for various reasons. It may be
399 * possible that the user does not have access to the
400 * pathname, if this happens, we will fall back on
401 * "stale" filesystem statistics.
402 */
403 error = statfs(mntbuf[i].f_mntonname, &mntbuf[j]);
404 if (nflag || error < 0)
405 if (i != j) {
406 if (error < 0)
407 xo_warnx("%s stats possibly stale",
408 mntbuf[i].f_mntonname);
409 mntbuf[j] = mntbuf[i];
410 }
411 j++;
412 }
413 return (j);
414 }
415
416 static void
prthuman(const struct statfs * sfsp,int64_t used)417 prthuman(const struct statfs *sfsp, int64_t used)
418 {
419
420 prthumanval(" {:blocks/%6s}", sfsp->f_blocks * sfsp->f_bsize);
421 prthumanval(" {:used/%6s}", used * sfsp->f_bsize);
422 prthumanval(" {:available/%6s}", sfsp->f_bavail * sfsp->f_bsize);
423 }
424
425 static void
prthumanval(const char * fmt,int64_t bytes)426 prthumanval(const char *fmt, int64_t bytes)
427 {
428 char buf[6];
429 int flags;
430
431 flags = HN_B | HN_NOSPACE | HN_DECIMAL;
432 if (hflag == UNITS_SI)
433 flags |= HN_DIVISOR_1000;
434
435 humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1),
436 bytes, "", HN_AUTOSCALE, flags);
437
438 xo_attr("value", "%lld", (long long) bytes);
439 xo_emit(fmt, buf);
440 }
441
442 /*
443 * Print an inode count in "human-readable" format.
444 */
445 static void
prthumanvalinode(const char * fmt,int64_t bytes)446 prthumanvalinode(const char *fmt, int64_t bytes)
447 {
448 char buf[6];
449 int flags;
450
451 flags = HN_NOSPACE | HN_DECIMAL | HN_DIVISOR_1000;
452
453 humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1),
454 bytes, "", HN_AUTOSCALE, flags);
455
456 xo_attr("value", "%lld", (long long) bytes);
457 xo_emit(fmt, buf);
458 }
459
460 /*
461 * Convert statfs returned file system size into BLOCKSIZE units.
462 */
463 static intmax_t
fsbtoblk(int64_t num,uint64_t fsbs,u_long bs)464 fsbtoblk(int64_t num, uint64_t fsbs, u_long bs)
465 {
466 return (num * (intmax_t) fsbs / (int64_t) bs);
467 }
468
469 /*
470 * Print out status about a file system.
471 */
472 static void
prtstat(struct statfs * sfsp,struct maxwidths * mwp)473 prtstat(struct statfs *sfsp, struct maxwidths *mwp)
474 {
475 static long blocksize;
476 static int headerlen, timesthrough = 0;
477 static const char *header;
478 int64_t used, availblks, inodes;
479 const char *format;
480
481 if (++timesthrough == 1) {
482 mwp->mntfrom = imax(mwp->mntfrom, (int)strlen("Filesystem"));
483 mwp->fstype = imax(mwp->fstype, (int)strlen("Type"));
484 if (thousands) { /* make space for commas */
485 mwp->total += (mwp->total - 1) / 3;
486 mwp->used += (mwp->used - 1) / 3;
487 mwp->avail += (mwp->avail - 1) / 3;
488 mwp->iused += (mwp->iused - 1) / 3;
489 mwp->ifree += (mwp->ifree - 1) / 3;
490 }
491 if (hflag) {
492 header = " Size";
493 mwp->total = mwp->used = mwp->avail =
494 (int)strlen(header);
495 } else {
496 header = getbsize(&headerlen, &blocksize);
497 mwp->total = imax(mwp->total, headerlen);
498 }
499 mwp->used = imax(mwp->used, (int)strlen("Used"));
500 mwp->avail = imax(mwp->avail, (int)strlen("Avail"));
501
502 xo_emit("{T:/%-*s}", mwp->mntfrom, "Filesystem");
503 if (Tflag)
504 xo_emit(" {T:/%-*s}", mwp->fstype, "Type");
505 xo_emit(" {T:/%*s} {T:/%*s} {T:/%*s} {T:Capacity}",
506 mwp->total, header,
507 mwp->used, "Used", mwp->avail, "Avail");
508 if (iflag) {
509 mwp->iused = imax(hflag ? 0 : mwp->iused,
510 (int)strlen(" iused"));
511 mwp->ifree = imax(hflag ? 0 : mwp->ifree,
512 (int)strlen("ifree"));
513 xo_emit(" {T:/%*s} {T:/%*s} {T:\%iused}",
514 mwp->iused - 2, "iused", mwp->ifree, "ifree");
515 }
516 xo_emit(" {T:Mounted on}\n");
517 }
518
519 xo_open_instance("filesystem");
520 /* Check for 0 block size. Can this happen? */
521 if (sfsp->f_bsize == 0) {
522 xo_warnx ("File system %s does not have a block size, assuming 512.",
523 sfsp->f_mntonname);
524 sfsp->f_bsize = 512;
525 }
526 xo_emit("{tk:name/%-*s}", mwp->mntfrom, sfsp->f_mntfromname);
527 if (Tflag)
528 xo_emit(" {:type/%-*s}", mwp->fstype, sfsp->f_fstypename);
529 used = sfsp->f_blocks - sfsp->f_bfree;
530 availblks = sfsp->f_bavail + used;
531 if (hflag) {
532 prthuman(sfsp, used);
533 } else {
534 if (thousands)
535 format = " {t:total-blocks/%*j'd} {t:used-blocks/%*j'd} "
536 "{t:available-blocks/%*j'd}";
537 else
538 format = " {t:total-blocks/%*jd} {t:used-blocks/%*jd} "
539 "{t:available-blocks/%*jd}";
540 xo_emit(format,
541 mwp->total, fsbtoblk(sfsp->f_blocks,
542 sfsp->f_bsize, blocksize),
543 mwp->used, fsbtoblk(used, sfsp->f_bsize, blocksize),
544 mwp->avail, fsbtoblk(sfsp->f_bavail,
545 sfsp->f_bsize, blocksize));
546 }
547 xo_emit(" {:used-percent/%5.0f}{U:%%}",
548 availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
549 if (iflag) {
550 inodes = sfsp->f_files;
551 used = inodes - sfsp->f_ffree;
552 if (hflag) {
553 xo_emit(" ");
554 prthumanvalinode(" {:inodes-used/%5s}", used);
555 prthumanvalinode(" {:inodes-free/%5s}", sfsp->f_ffree);
556 } else {
557 if (thousands)
558 format = " {:inodes-used/%*j'd} {:inodes-free/%*j'd}";
559 else
560 format = " {:inodes-used/%*jd} {:inodes-free/%*jd}";
561 xo_emit(format, mwp->iused, (intmax_t)used,
562 mwp->ifree, (intmax_t)sfsp->f_ffree);
563 }
564 xo_emit(" {:inodes-used-percent/%4.0f}{U:%%} ",
565 inodes == 0 ? 100.0 :
566 (double)used / (double)inodes * 100.0);
567 } else
568 xo_emit(" ");
569 if (strncmp(sfsp->f_mntfromname, "total", MNAMELEN) != 0)
570 xo_emit(" {:mounted-on}", sfsp->f_mntonname);
571 xo_emit("\n");
572 xo_close_instance("filesystem");
573 }
574
575 static void
addstat(struct statfs * totalfsp,struct statfs * statfsp)576 addstat(struct statfs *totalfsp, struct statfs *statfsp)
577 {
578 uint64_t bsize;
579
580 bsize = statfsp->f_bsize / totalfsp->f_bsize;
581 totalfsp->f_blocks += statfsp->f_blocks * bsize;
582 totalfsp->f_bfree += statfsp->f_bfree * bsize;
583 totalfsp->f_bavail += statfsp->f_bavail * bsize;
584 totalfsp->f_files += statfsp->f_files;
585 totalfsp->f_ffree += statfsp->f_ffree;
586 }
587
588 /*
589 * Update the maximum field-width information in `mwp' based on
590 * the file system specified by `sfsp'.
591 */
592 static void
update_maxwidths(struct maxwidths * mwp,const struct statfs * sfsp)593 update_maxwidths(struct maxwidths *mwp, const struct statfs *sfsp)
594 {
595 static long blocksize = 0;
596 int dummy;
597
598 if (blocksize == 0)
599 getbsize(&dummy, &blocksize);
600
601 mwp->mntfrom = imax(mwp->mntfrom, (int)strlen(sfsp->f_mntfromname));
602 mwp->fstype = imax(mwp->fstype, (int)strlen(sfsp->f_fstypename));
603 mwp->total = imax(mwp->total, int64width(
604 fsbtoblk((int64_t)sfsp->f_blocks, sfsp->f_bsize, blocksize)));
605 mwp->used = imax(mwp->used,
606 int64width(fsbtoblk((int64_t)sfsp->f_blocks -
607 (int64_t)sfsp->f_bfree, sfsp->f_bsize, blocksize)));
608 mwp->avail = imax(mwp->avail, int64width(fsbtoblk(sfsp->f_bavail,
609 sfsp->f_bsize, blocksize)));
610 mwp->iused = imax(mwp->iused, int64width((int64_t)sfsp->f_files -
611 sfsp->f_ffree));
612 mwp->ifree = imax(mwp->ifree, int64width(sfsp->f_ffree));
613 }
614
615 /* Return the width in characters of the specified value. */
616 static int
int64width(int64_t val)617 int64width(int64_t val)
618 {
619 int len;
620
621 len = 0;
622 /* Negative or zero values require one extra digit. */
623 if (val <= 0) {
624 val = -val;
625 len++;
626 }
627 while (val > 0) {
628 len++;
629 val /= 10;
630 }
631
632 return (len);
633 }
634
635 static void
usage(void)636 usage(void)
637 {
638
639 xo_error(
640 "usage: df [-b | -g | -H | -h | -k | -m | -P] [-acilnT] [-t type] [-,]\n"
641 " [file | filesystem ...]\n");
642 exit(EX_USAGE);
643 }
644
645 static char *
makenetvfslist(void)646 makenetvfslist(void)
647 {
648 char *str, *strptr, **listptr;
649 struct xvfsconf *xvfsp, *keep_xvfsp;
650 size_t buflen;
651 int cnt, i, maxvfsconf;
652
653 if (sysctlbyname("vfs.conflist", NULL, &buflen, NULL, 0) < 0) {
654 xo_warn("sysctl(vfs.conflist)");
655 return (NULL);
656 }
657 xvfsp = malloc(buflen);
658 if (xvfsp == NULL) {
659 xo_warnx("malloc failed");
660 return (NULL);
661 }
662 keep_xvfsp = xvfsp;
663 if (sysctlbyname("vfs.conflist", xvfsp, &buflen, NULL, 0) < 0) {
664 xo_warn("sysctl(vfs.conflist)");
665 free(keep_xvfsp);
666 return (NULL);
667 }
668 maxvfsconf = buflen / sizeof(struct xvfsconf);
669
670 if ((listptr = malloc(sizeof(char*) * maxvfsconf)) == NULL) {
671 xo_warnx("malloc failed");
672 free(keep_xvfsp);
673 return (NULL);
674 }
675
676 for (cnt = 0, i = 0; i < maxvfsconf; i++) {
677 if (xvfsp->vfc_flags & VFCF_NETWORK) {
678 listptr[cnt++] = strdup(xvfsp->vfc_name);
679 if (listptr[cnt-1] == NULL) {
680 xo_warnx("malloc failed");
681 free(listptr);
682 free(keep_xvfsp);
683 return (NULL);
684 }
685 }
686 xvfsp++;
687 }
688
689 if (cnt == 0 ||
690 (str = malloc(sizeof(char) * (32 * cnt + cnt + 2))) == NULL) {
691 if (cnt > 0)
692 xo_warnx("malloc failed");
693 free(listptr);
694 free(keep_xvfsp);
695 return (NULL);
696 }
697
698 *str = 'n'; *(str + 1) = 'o';
699 for (i = 0, strptr = str + 2; i < cnt; i++, strptr++) {
700 strlcpy(strptr, listptr[i], 32);
701 strptr += strlen(listptr[i]);
702 *strptr = ',';
703 free(listptr[i]);
704 }
705 *(--strptr) = '\0';
706
707 free(keep_xvfsp);
708 free(listptr);
709 return (str);
710 }
711