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 <getopt.h> 56 #include <libutil.h> 57 #include <locale.h> 58 #include <stdint.h> 59 #include <stdio.h> 60 #include <stdlib.h> 61 #include <string.h> 62 #include <sysexits.h> 63 #include <unistd.h> 64 #include <libxo/xo.h> 65 66 #define UNITS_SI 1 67 #define UNITS_2 2 68 69 /* Maximum widths of various fields. */ 70 struct maxwidths { 71 int mntfrom; 72 int fstype; 73 int total; 74 int used; 75 int avail; 76 int iused; 77 int ifree; 78 }; 79 80 static void addstat(struct statfs *, struct statfs *); 81 static char *getmntpt(const char *); 82 static const char **makevfslist(char *fslist, int *skip); 83 static int checkvfsname(const char *vfsname, const char **vfslist, int skip); 84 static int checkvfsselected(char *); 85 static int int64width(int64_t); 86 static char *makenetvfslist(void); 87 static void prthuman(const struct statfs *, int64_t); 88 static void prthumanval(const char *, int64_t); 89 static intmax_t fsbtoblk(int64_t, uint64_t, u_long); 90 static void prtstat(struct statfs *, struct maxwidths *); 91 static size_t regetmntinfo(struct statfs **, long); 92 static void update_maxwidths(struct maxwidths *, const struct statfs *); 93 static void usage(void); 94 95 static __inline int 96 imax(int a, int b) 97 { 98 return (a > b ? a : b); 99 } 100 101 static int aflag = 0, cflag, hflag, iflag, kflag, lflag = 0, nflag, Tflag; 102 static int thousands; 103 static int skipvfs_l, skipvfs_t; 104 static const char **vfslist_l, **vfslist_t; 105 106 static const struct option long_options[] = 107 { 108 { "si", no_argument, NULL, 'H' }, 109 { NULL, no_argument, NULL, 0 }, 110 }; 111 112 int 113 main(int argc, char *argv[]) 114 { 115 struct stat stbuf; 116 struct statfs statfsbuf, totalbuf; 117 struct maxwidths maxwidths; 118 struct statfs *mntbuf; 119 char *mntpt; 120 int i, mntsize; 121 int ch, rv; 122 123 (void)setlocale(LC_ALL, ""); 124 memset(&maxwidths, 0, sizeof(maxwidths)); 125 memset(&totalbuf, 0, sizeof(totalbuf)); 126 totalbuf.f_bsize = DEV_BSIZE; 127 strlcpy(totalbuf.f_mntfromname, "total", MNAMELEN); 128 129 argc = xo_parse_args(argc, argv); 130 if (argc < 0) 131 exit(1); 132 133 while ((ch = getopt_long(argc, argv, "+abcgHhiklmnPt:T,", long_options, 134 NULL)) != -1) 135 switch (ch) { 136 case 'a': 137 aflag = 1; 138 break; 139 case 'b': 140 /* FALLTHROUGH */ 141 case 'P': 142 /* 143 * POSIX specifically discusses the behavior of 144 * both -k and -P. It states that the blocksize should 145 * be set to 1024. Thus, if this occurs, simply break 146 * rather than clobbering the old blocksize. 147 */ 148 if (kflag) 149 break; 150 setenv("BLOCKSIZE", "512", 1); 151 hflag = 0; 152 break; 153 case 'c': 154 cflag = 1; 155 break; 156 case 'g': 157 setenv("BLOCKSIZE", "1g", 1); 158 hflag = 0; 159 break; 160 case 'H': 161 hflag = UNITS_SI; 162 break; 163 case 'h': 164 hflag = UNITS_2; 165 break; 166 case 'i': 167 iflag = 1; 168 break; 169 case 'k': 170 kflag++; 171 setenv("BLOCKSIZE", "1024", 1); 172 hflag = 0; 173 break; 174 case 'l': 175 /* Ignore duplicate -l */ 176 if (lflag) 177 break; 178 vfslist_l = makevfslist(makenetvfslist(), &skipvfs_l); 179 lflag = 1; 180 break; 181 case 'm': 182 setenv("BLOCKSIZE", "1m", 1); 183 hflag = 0; 184 break; 185 case 'n': 186 nflag = 1; 187 break; 188 case 't': 189 if (vfslist_t != NULL) 190 xo_errx(1, "only one -t option may be specified"); 191 vfslist_t = makevfslist(optarg, &skipvfs_t); 192 break; 193 case 'T': 194 Tflag = 1; 195 break; 196 case ',': 197 thousands = 1; 198 break; 199 case '?': 200 default: 201 usage(); 202 } 203 argc -= optind; 204 argv += optind; 205 206 rv = EXIT_SUCCESS; 207 if (!*argv) { 208 /* everything (modulo -t) */ 209 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 210 mntsize = regetmntinfo(&mntbuf, mntsize); 211 } else { 212 /* just the filesystems specified on the command line */ 213 mntbuf = malloc(argc * sizeof(*mntbuf)); 214 if (mntbuf == NULL) 215 xo_err(1, "malloc()"); 216 mntsize = 0; 217 /* continued in for loop below */ 218 } 219 220 xo_open_container("storage-system-information"); 221 xo_open_list("filesystem"); 222 223 /* iterate through specified filesystems */ 224 for (; *argv; argv++) { 225 if (stat(*argv, &stbuf) < 0) { 226 if ((mntpt = getmntpt(*argv)) == NULL) { 227 xo_warn("%s", *argv); 228 rv = EXIT_FAILURE; 229 continue; 230 } 231 } else if (S_ISCHR(stbuf.st_mode)) { 232 mntpt = getmntpt(*argv); 233 if (mntpt == NULL) { 234 xo_warnx("%s: not mounted", *argv); 235 rv = EXIT_FAILURE; 236 continue; 237 } 238 } else { 239 mntpt = *argv; 240 } 241 242 /* 243 * Statfs does not take a `wait' flag, so we cannot 244 * implement nflag here. 245 */ 246 if (statfs(mntpt, &statfsbuf) < 0) { 247 xo_warn("%s", mntpt); 248 rv = EXIT_FAILURE; 249 continue; 250 } 251 252 /* 253 * Check to make sure the arguments we've been given are 254 * satisfied. Return an error if we have been asked to 255 * list a mount point that does not match the other args 256 * we've been given (-l, -t, etc.). 257 */ 258 if (checkvfsselected(statfsbuf.f_fstypename) != 0) { 259 rv = EXIT_FAILURE; 260 continue; 261 } 262 263 /* the user asked for it, so ignore the ignore flag */ 264 statfsbuf.f_flags &= ~MNT_IGNORE; 265 266 /* add to list */ 267 mntbuf[mntsize++] = statfsbuf; 268 } 269 270 memset(&maxwidths, 0, sizeof(maxwidths)); 271 for (i = 0; i < mntsize; i++) { 272 if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0) { 273 update_maxwidths(&maxwidths, &mntbuf[i]); 274 if (cflag) 275 addstat(&totalbuf, &mntbuf[i]); 276 } 277 } 278 for (i = 0; i < mntsize; i++) 279 if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0) 280 prtstat(&mntbuf[i], &maxwidths); 281 282 xo_close_list("filesystem"); 283 284 if (cflag) 285 prtstat(&totalbuf, &maxwidths); 286 287 xo_close_container("storage-system-information"); 288 if (xo_finish() < 0) 289 rv = EXIT_FAILURE; 290 exit(rv); 291 } 292 293 static char * 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 ** 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 xo_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 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 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 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 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 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 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 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 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 if (inodes == 0) 565 xo_emit(" {:inodes-used-percent/ -}{U:} "); 566 else { 567 xo_emit(" {:inodes-used-percent/%4.0f}{U:%%} ", 568 (double)used / (double)inodes * 100.0); 569 } 570 } else 571 xo_emit(" "); 572 if (strncmp(sfsp->f_mntfromname, "total", MNAMELEN) != 0) 573 xo_emit(" {:mounted-on}", sfsp->f_mntonname); 574 xo_emit("\n"); 575 xo_close_instance("filesystem"); 576 } 577 578 static void 579 addstat(struct statfs *totalfsp, struct statfs *statfsp) 580 { 581 uint64_t bsize; 582 583 bsize = statfsp->f_bsize / totalfsp->f_bsize; 584 totalfsp->f_blocks += statfsp->f_blocks * bsize; 585 totalfsp->f_bfree += statfsp->f_bfree * bsize; 586 totalfsp->f_bavail += statfsp->f_bavail * bsize; 587 totalfsp->f_files += statfsp->f_files; 588 totalfsp->f_ffree += statfsp->f_ffree; 589 } 590 591 /* 592 * Update the maximum field-width information in `mwp' based on 593 * the file system specified by `sfsp'. 594 */ 595 static void 596 update_maxwidths(struct maxwidths *mwp, const struct statfs *sfsp) 597 { 598 static long blocksize = 0; 599 int dummy; 600 601 if (blocksize == 0) 602 getbsize(&dummy, &blocksize); 603 604 mwp->mntfrom = imax(mwp->mntfrom, (int)strlen(sfsp->f_mntfromname)); 605 mwp->fstype = imax(mwp->fstype, (int)strlen(sfsp->f_fstypename)); 606 mwp->total = imax(mwp->total, int64width( 607 fsbtoblk((int64_t)sfsp->f_blocks, sfsp->f_bsize, blocksize))); 608 mwp->used = imax(mwp->used, 609 int64width(fsbtoblk((int64_t)sfsp->f_blocks - 610 (int64_t)sfsp->f_bfree, sfsp->f_bsize, blocksize))); 611 mwp->avail = imax(mwp->avail, int64width(fsbtoblk(sfsp->f_bavail, 612 sfsp->f_bsize, blocksize))); 613 mwp->iused = imax(mwp->iused, int64width((int64_t)sfsp->f_files - 614 sfsp->f_ffree)); 615 mwp->ifree = imax(mwp->ifree, int64width(sfsp->f_ffree)); 616 } 617 618 /* Return the width in characters of the specified value. */ 619 static int 620 int64width(int64_t val) 621 { 622 int len; 623 624 len = 0; 625 /* Negative or zero values require one extra digit. */ 626 if (val <= 0) { 627 val = -val; 628 len++; 629 } 630 while (val > 0) { 631 len++; 632 val /= 10; 633 } 634 635 return (len); 636 } 637 638 static void 639 usage(void) 640 { 641 642 xo_error( 643 "usage: df [-b | -g | -H | -h | -k | -m | -P] [-acilnT] [-t type] [-,]\n" 644 " [file | filesystem ...]\n"); 645 exit(EX_USAGE); 646 } 647 648 static char * 649 makenetvfslist(void) 650 { 651 char *str, *strptr, **listptr; 652 struct xvfsconf *xvfsp, *keep_xvfsp; 653 size_t buflen; 654 int cnt, i, maxvfsconf; 655 656 if (sysctlbyname("vfs.conflist", NULL, &buflen, NULL, 0) < 0) { 657 xo_warn("sysctl(vfs.conflist)"); 658 return (NULL); 659 } 660 xvfsp = malloc(buflen); 661 if (xvfsp == NULL) { 662 xo_warnx("malloc failed"); 663 return (NULL); 664 } 665 keep_xvfsp = xvfsp; 666 if (sysctlbyname("vfs.conflist", xvfsp, &buflen, NULL, 0) < 0) { 667 xo_warn("sysctl(vfs.conflist)"); 668 free(keep_xvfsp); 669 return (NULL); 670 } 671 maxvfsconf = buflen / sizeof(struct xvfsconf); 672 673 if ((listptr = malloc(sizeof(char*) * maxvfsconf)) == NULL) { 674 xo_warnx("malloc failed"); 675 free(keep_xvfsp); 676 return (NULL); 677 } 678 679 for (cnt = 0, i = 0; i < maxvfsconf; i++) { 680 if (xvfsp->vfc_flags & VFCF_NETWORK) { 681 listptr[cnt++] = strdup(xvfsp->vfc_name); 682 if (listptr[cnt-1] == NULL) { 683 xo_warnx("malloc failed"); 684 free(listptr); 685 free(keep_xvfsp); 686 return (NULL); 687 } 688 } 689 xvfsp++; 690 } 691 692 if (cnt == 0 || 693 (str = malloc(sizeof(char) * (32 * cnt + cnt + 2))) == NULL) { 694 if (cnt > 0) 695 xo_warnx("malloc failed"); 696 free(listptr); 697 free(keep_xvfsp); 698 return (NULL); 699 } 700 701 *str = 'n'; *(str + 1) = 'o'; 702 for (i = 0, strptr = str + 2; i < cnt; i++, strptr++) { 703 strlcpy(strptr, listptr[i], 32); 704 strptr += strlen(listptr[i]); 705 *strptr = ','; 706 free(listptr[i]); 707 } 708 *(--strptr) = '\0'; 709 710 free(keep_xvfsp); 711 free(listptr); 712 return (str); 713 } 714