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 #ifdef MOUNT_CHAR_DEVS 56 #include <ufs/ufs/ufsmount.h> 57 #endif 58 #include <err.h> 59 #include <getopt.h> 60 #include <libutil.h> 61 #include <locale.h> 62 #ifdef MOUNT_CHAR_DEVS 63 #include <mntopts.h> 64 #endif 65 #include <stdint.h> 66 #include <stdio.h> 67 #include <stdlib.h> 68 #include <string.h> 69 #include <sysexits.h> 70 #include <unistd.h> 71 #include <libxo/xo.h> 72 73 #include "extern.h" 74 75 #define UNITS_SI 1 76 #define UNITS_2 2 77 78 /* Maximum widths of various fields. */ 79 struct maxwidths { 80 int mntfrom; 81 int fstype; 82 int total; 83 int used; 84 int avail; 85 int iused; 86 int ifree; 87 }; 88 89 static void addstat(struct statfs *, struct statfs *); 90 static char *getmntpt(const char *); 91 static int int64width(int64_t); 92 static char *makenetvfslist(void); 93 static void prthuman(const struct statfs *, int64_t); 94 static void prthumanval(const char *, int64_t); 95 static intmax_t fsbtoblk(int64_t, uint64_t, u_long); 96 static void prtstat(struct statfs *, struct maxwidths *); 97 static size_t regetmntinfo(struct statfs **, long, const char **); 98 static void update_maxwidths(struct maxwidths *, const struct statfs *); 99 static void usage(void); 100 101 static __inline int 102 imax(int a, int b) 103 { 104 return (a > b ? a : b); 105 } 106 107 static int aflag = 0, cflag, hflag, iflag, kflag, lflag = 0, nflag, Tflag; 108 static int thousands; 109 #ifdef MOUNT_CHAR_DEVS 110 static struct ufs_args mdev; 111 #endif 112 113 static const struct option long_options[] = 114 { 115 { "si", no_argument, NULL, 'H' }, 116 { NULL, no_argument, NULL, 0 }, 117 }; 118 119 int 120 main(int argc, char *argv[]) 121 { 122 struct stat stbuf; 123 struct statfs statfsbuf, totalbuf; 124 struct maxwidths maxwidths; 125 struct statfs *mntbuf; 126 #ifdef MOUNT_CHAR_DEVS 127 struct iovec *iov = NULL; 128 #endif 129 const char *fstype; 130 #ifdef MOUNT_CHAR_DEVS 131 char *mntpath; 132 char errmsg[255] = {0}; 133 #endif 134 char *mntpt; 135 const char **vfslist; 136 int i, mntsize; 137 int ch, rv; 138 #ifdef MOUNT_CHAR_DEVS 139 int iovlen = 0; 140 #endif 141 142 fstype = "ufs"; 143 (void)setlocale(LC_ALL, ""); 144 memset(&maxwidths, 0, sizeof(maxwidths)); 145 memset(&totalbuf, 0, sizeof(totalbuf)); 146 totalbuf.f_bsize = DEV_BSIZE; 147 strlcpy(totalbuf.f_mntfromname, "total", MNAMELEN); 148 vfslist = NULL; 149 150 argc = xo_parse_args(argc, argv); 151 if (argc < 0) 152 exit(1); 153 154 while ((ch = getopt_long(argc, argv, "+abcgHhiklmnPt:T,", long_options, 155 NULL)) != -1) 156 switch (ch) { 157 case 'a': 158 aflag = 1; 159 break; 160 case 'b': 161 /* FALLTHROUGH */ 162 case 'P': 163 /* 164 * POSIX specifically discusses the behavior of 165 * both -k and -P. It states that the blocksize should 166 * be set to 1024. Thus, if this occurs, simply break 167 * rather than clobbering the old blocksize. 168 */ 169 if (kflag) 170 break; 171 setenv("BLOCKSIZE", "512", 1); 172 hflag = 0; 173 break; 174 case 'c': 175 cflag = 1; 176 break; 177 case 'g': 178 setenv("BLOCKSIZE", "1g", 1); 179 hflag = 0; 180 break; 181 case 'H': 182 hflag = UNITS_SI; 183 break; 184 case 'h': 185 hflag = UNITS_2; 186 break; 187 case 'i': 188 iflag = 1; 189 break; 190 case 'k': 191 kflag++; 192 setenv("BLOCKSIZE", "1024", 1); 193 hflag = 0; 194 break; 195 case 'l': 196 /* Ignore duplicate -l */ 197 if (lflag) 198 break; 199 if (vfslist != NULL) 200 xo_errx(1, "-l and -t are mutually exclusive."); 201 vfslist = makevfslist(makenetvfslist()); 202 lflag = 1; 203 break; 204 case 'm': 205 setenv("BLOCKSIZE", "1m", 1); 206 hflag = 0; 207 break; 208 case 'n': 209 nflag = 1; 210 break; 211 case 't': 212 if (lflag) 213 xo_errx(1, "-l and -t are mutually exclusive."); 214 if (vfslist != NULL) 215 xo_errx(1, "only one -t option may be specified"); 216 fstype = optarg; 217 vfslist = makevfslist(optarg); 218 break; 219 case 'T': 220 Tflag = 1; 221 break; 222 case ',': 223 thousands = 1; 224 break; 225 case '?': 226 default: 227 usage(); 228 } 229 argc -= optind; 230 argv += optind; 231 232 rv = 0; 233 if (!*argv) { 234 /* everything (modulo -t) */ 235 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 236 mntsize = regetmntinfo(&mntbuf, mntsize, vfslist); 237 } else { 238 /* just the filesystems specified on the command line */ 239 mntbuf = malloc(argc * sizeof(*mntbuf)); 240 if (mntbuf == NULL) 241 xo_err(1, "malloc()"); 242 mntsize = 0; 243 /* continued in for loop below */ 244 } 245 246 xo_open_container("storage-system-information"); 247 xo_open_list("filesystem"); 248 249 /* iterate through specified filesystems */ 250 for (; *argv; argv++) { 251 if (stat(*argv, &stbuf) < 0) { 252 if ((mntpt = getmntpt(*argv)) == NULL) { 253 xo_warn("%s", *argv); 254 rv = 1; 255 continue; 256 } 257 } else if (S_ISCHR(stbuf.st_mode)) { 258 if ((mntpt = getmntpt(*argv)) == NULL) { 259 #ifdef MOUNT_CHAR_DEVS 260 xo_warnx( 261 "df on unmounted devices is deprecated"); 262 mdev.fspec = *argv; 263 mntpath = strdup("/tmp/df.XXXXXX"); 264 if (mntpath == NULL) { 265 xo_warn("strdup failed"); 266 rv = 1; 267 continue; 268 } 269 mntpt = mkdtemp(mntpath); 270 if (mntpt == NULL) { 271 xo_warn("mkdtemp(\"%s\") failed", mntpath); 272 rv = 1; 273 free(mntpath); 274 continue; 275 } 276 if (iov != NULL) 277 free_iovec(&iov, &iovlen); 278 build_iovec_argf(&iov, &iovlen, "fstype", "%s", 279 fstype); 280 build_iovec_argf(&iov, &iovlen, "fspath", "%s", 281 mntpath); 282 build_iovec_argf(&iov, &iovlen, "from", "%s", 283 *argv); 284 build_iovec(&iov, &iovlen, "errmsg", errmsg, 285 sizeof(errmsg)); 286 if (nmount(iov, iovlen, 287 MNT_RDONLY|MNT_NOEXEC) < 0) { 288 if (errmsg[0]) 289 xo_warn("%s: %s", *argv, 290 errmsg); 291 else 292 xo_warn("%s", *argv); 293 rv = 1; 294 (void)rmdir(mntpt); 295 free(mntpath); 296 continue; 297 } else if (statfs(mntpt, &statfsbuf) == 0) { 298 statfsbuf.f_mntonname[0] = '\0'; 299 prtstat(&statfsbuf, &maxwidths); 300 if (cflag) 301 addstat(&totalbuf, &statfsbuf); 302 } else { 303 xo_warn("%s", *argv); 304 rv = 1; 305 } 306 (void)unmount(mntpt, 0); 307 (void)rmdir(mntpt); 308 free(mntpath); 309 continue; 310 #else 311 xo_warnx("%s: not mounted", *argv); 312 rv = 1; 313 continue; 314 #endif 315 } 316 } else 317 mntpt = *argv; 318 319 /* 320 * Statfs does not take a `wait' flag, so we cannot 321 * implement nflag here. 322 */ 323 if (statfs(mntpt, &statfsbuf) < 0) { 324 xo_warn("%s", mntpt); 325 rv = 1; 326 continue; 327 } 328 329 /* 330 * Check to make sure the arguments we've been given are 331 * satisfied. Return an error if we have been asked to 332 * list a mount point that does not match the other args 333 * we've been given (-l, -t, etc.). 334 */ 335 if (checkvfsname(statfsbuf.f_fstypename, vfslist)) { 336 rv = 1; 337 continue; 338 } 339 340 /* the user asked for it, so ignore the ignore flag */ 341 statfsbuf.f_flags &= ~MNT_IGNORE; 342 343 /* add to list */ 344 mntbuf[mntsize++] = statfsbuf; 345 } 346 347 memset(&maxwidths, 0, sizeof(maxwidths)); 348 for (i = 0; i < mntsize; i++) { 349 if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0) { 350 update_maxwidths(&maxwidths, &mntbuf[i]); 351 if (cflag) 352 addstat(&totalbuf, &mntbuf[i]); 353 } 354 } 355 for (i = 0; i < mntsize; i++) 356 if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0) 357 prtstat(&mntbuf[i], &maxwidths); 358 359 xo_close_list("filesystem"); 360 361 if (cflag) 362 prtstat(&totalbuf, &maxwidths); 363 364 xo_close_container("storage-system-information"); 365 xo_finish(); 366 exit(rv); 367 } 368 369 static char * 370 getmntpt(const char *name) 371 { 372 size_t mntsize, i; 373 struct statfs *mntbuf; 374 375 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 376 for (i = 0; i < mntsize; i++) { 377 if (!strcmp(mntbuf[i].f_mntfromname, name)) 378 return (mntbuf[i].f_mntonname); 379 } 380 return (NULL); 381 } 382 383 /* 384 * Make a pass over the file system info in ``mntbuf'' filtering out 385 * file system types not in vfslist and possibly re-stating to get 386 * current (not cached) info. Returns the new count of valid statfs bufs. 387 */ 388 static size_t 389 regetmntinfo(struct statfs **mntbufp, long mntsize, const char **vfslist) 390 { 391 int error, i, j; 392 struct statfs *mntbuf; 393 394 if (vfslist == NULL) 395 return (nflag ? mntsize : getmntinfo(mntbufp, MNT_WAIT)); 396 397 mntbuf = *mntbufp; 398 for (j = 0, i = 0; i < mntsize; i++) { 399 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 400 continue; 401 /* 402 * XXX statfs(2) can fail for various reasons. It may be 403 * possible that the user does not have access to the 404 * pathname, if this happens, we will fall back on 405 * "stale" filesystem statistics. 406 */ 407 error = statfs(mntbuf[i].f_mntonname, &mntbuf[j]); 408 if (nflag || error < 0) 409 if (i != j) { 410 if (error < 0) 411 xo_warnx("%s stats possibly stale", 412 mntbuf[i].f_mntonname); 413 mntbuf[j] = mntbuf[i]; 414 } 415 j++; 416 } 417 return (j); 418 } 419 420 static void 421 prthuman(const struct statfs *sfsp, int64_t used) 422 { 423 424 prthumanval(" {:blocks/%6s}", sfsp->f_blocks * sfsp->f_bsize); 425 prthumanval(" {:used/%6s}", used * sfsp->f_bsize); 426 prthumanval(" {:available/%6s}", sfsp->f_bavail * sfsp->f_bsize); 427 } 428 429 static void 430 prthumanval(const char *fmt, int64_t bytes) 431 { 432 char buf[6]; 433 int flags; 434 435 flags = HN_B | HN_NOSPACE | HN_DECIMAL; 436 if (hflag == UNITS_SI) 437 flags |= 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 * Print an inode count in "human-readable" format. 448 */ 449 static void 450 prthumanvalinode(const char *fmt, int64_t bytes) 451 { 452 char buf[6]; 453 int flags; 454 455 flags = HN_NOSPACE | HN_DECIMAL | HN_DIVISOR_1000; 456 457 humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1), 458 bytes, "", HN_AUTOSCALE, flags); 459 460 xo_attr("value", "%lld", (long long) bytes); 461 xo_emit(fmt, buf); 462 } 463 464 /* 465 * Convert statfs returned file system size into BLOCKSIZE units. 466 */ 467 static intmax_t 468 fsbtoblk(int64_t num, uint64_t fsbs, u_long bs) 469 { 470 return (num * (intmax_t) fsbs / (int64_t) bs); 471 } 472 473 /* 474 * Print out status about a file system. 475 */ 476 static void 477 prtstat(struct statfs *sfsp, struct maxwidths *mwp) 478 { 479 static long blocksize; 480 static int headerlen, timesthrough = 0; 481 static const char *header; 482 int64_t used, availblks, inodes; 483 const char *format; 484 485 if (++timesthrough == 1) { 486 mwp->mntfrom = imax(mwp->mntfrom, (int)strlen("Filesystem")); 487 mwp->fstype = imax(mwp->fstype, (int)strlen("Type")); 488 if (thousands) { /* make space for commas */ 489 mwp->total += (mwp->total - 1) / 3; 490 mwp->used += (mwp->used - 1) / 3; 491 mwp->avail += (mwp->avail - 1) / 3; 492 mwp->iused += (mwp->iused - 1) / 3; 493 mwp->ifree += (mwp->ifree - 1) / 3; 494 } 495 if (hflag) { 496 header = " Size"; 497 mwp->total = mwp->used = mwp->avail = 498 (int)strlen(header); 499 } else { 500 header = getbsize(&headerlen, &blocksize); 501 mwp->total = imax(mwp->total, headerlen); 502 } 503 mwp->used = imax(mwp->used, (int)strlen("Used")); 504 mwp->avail = imax(mwp->avail, (int)strlen("Avail")); 505 506 xo_emit("{T:/%-*s}", mwp->mntfrom, "Filesystem"); 507 if (Tflag) 508 xo_emit(" {T:/%-*s}", mwp->fstype, "Type"); 509 xo_emit(" {T:/%*s} {T:/%*s} {T:/%*s} {T:Capacity}", 510 mwp->total, header, 511 mwp->used, "Used", mwp->avail, "Avail"); 512 if (iflag) { 513 mwp->iused = imax(hflag ? 0 : mwp->iused, 514 (int)strlen(" iused")); 515 mwp->ifree = imax(hflag ? 0 : mwp->ifree, 516 (int)strlen("ifree")); 517 xo_emit(" {T:/%*s} {T:/%*s} {T:\%iused}", 518 mwp->iused - 2, "iused", mwp->ifree, "ifree"); 519 } 520 xo_emit(" {T:Mounted on}\n"); 521 } 522 523 xo_open_instance("filesystem"); 524 /* Check for 0 block size. Can this happen? */ 525 if (sfsp->f_bsize == 0) { 526 xo_warnx ("File system %s does not have a block size, assuming 512.", 527 sfsp->f_mntonname); 528 sfsp->f_bsize = 512; 529 } 530 xo_emit("{tk:name/%-*s}", mwp->mntfrom, sfsp->f_mntfromname); 531 if (Tflag) 532 xo_emit(" {:type/%-*s}", mwp->fstype, sfsp->f_fstypename); 533 used = sfsp->f_blocks - sfsp->f_bfree; 534 availblks = sfsp->f_bavail + used; 535 if (hflag) { 536 prthuman(sfsp, used); 537 } else { 538 if (thousands) 539 format = " {t:total-blocks/%*j'd} {t:used-blocks/%*j'd} " 540 "{t:available-blocks/%*j'd}"; 541 else 542 format = " {t:total-blocks/%*jd} {t:used-blocks/%*jd} " 543 "{t:available-blocks/%*jd}"; 544 xo_emit(format, 545 mwp->total, fsbtoblk(sfsp->f_blocks, 546 sfsp->f_bsize, blocksize), 547 mwp->used, fsbtoblk(used, sfsp->f_bsize, blocksize), 548 mwp->avail, fsbtoblk(sfsp->f_bavail, 549 sfsp->f_bsize, blocksize)); 550 } 551 xo_emit(" {:used-percent/%5.0f}{U:%%}", 552 availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0); 553 if (iflag) { 554 inodes = sfsp->f_files; 555 used = inodes - sfsp->f_ffree; 556 if (hflag) { 557 xo_emit(" "); 558 prthumanvalinode(" {:inodes-used/%5s}", used); 559 prthumanvalinode(" {:inodes-free/%5s}", sfsp->f_ffree); 560 } else { 561 if (thousands) 562 format = " {:inodes-used/%*j'd} {:inodes-free/%*j'd}"; 563 else 564 format = " {:inodes-used/%*jd} {:inodes-free/%*jd}"; 565 xo_emit(format, mwp->iused, (intmax_t)used, 566 mwp->ifree, (intmax_t)sfsp->f_ffree); 567 } 568 xo_emit(" {:inodes-used-percent/%4.0f}{U:%%} ", 569 inodes == 0 ? 100.0 : 570 (double)used / (double)inodes * 100.0); 571 } else 572 xo_emit(" "); 573 if (strncmp(sfsp->f_mntfromname, "total", MNAMELEN) != 0) 574 xo_emit(" {:mounted-on}", sfsp->f_mntonname); 575 xo_emit("\n"); 576 xo_close_instance("filesystem"); 577 } 578 579 static void 580 addstat(struct statfs *totalfsp, struct statfs *statfsp) 581 { 582 uint64_t bsize; 583 584 bsize = statfsp->f_bsize / totalfsp->f_bsize; 585 totalfsp->f_blocks += statfsp->f_blocks * bsize; 586 totalfsp->f_bfree += statfsp->f_bfree * bsize; 587 totalfsp->f_bavail += statfsp->f_bavail * bsize; 588 totalfsp->f_files += statfsp->f_files; 589 totalfsp->f_ffree += statfsp->f_ffree; 590 } 591 592 /* 593 * Update the maximum field-width information in `mwp' based on 594 * the file system specified by `sfsp'. 595 */ 596 static void 597 update_maxwidths(struct maxwidths *mwp, const struct statfs *sfsp) 598 { 599 static long blocksize = 0; 600 int dummy; 601 602 if (blocksize == 0) 603 getbsize(&dummy, &blocksize); 604 605 mwp->mntfrom = imax(mwp->mntfrom, (int)strlen(sfsp->f_mntfromname)); 606 mwp->fstype = imax(mwp->fstype, (int)strlen(sfsp->f_fstypename)); 607 mwp->total = imax(mwp->total, int64width( 608 fsbtoblk((int64_t)sfsp->f_blocks, sfsp->f_bsize, blocksize))); 609 mwp->used = imax(mwp->used, 610 int64width(fsbtoblk((int64_t)sfsp->f_blocks - 611 (int64_t)sfsp->f_bfree, sfsp->f_bsize, blocksize))); 612 mwp->avail = imax(mwp->avail, int64width(fsbtoblk(sfsp->f_bavail, 613 sfsp->f_bsize, blocksize))); 614 mwp->iused = imax(mwp->iused, int64width((int64_t)sfsp->f_files - 615 sfsp->f_ffree)); 616 mwp->ifree = imax(mwp->ifree, int64width(sfsp->f_ffree)); 617 } 618 619 /* Return the width in characters of the specified value. */ 620 static int 621 int64width(int64_t val) 622 { 623 int len; 624 625 len = 0; 626 /* Negative or zero values require one extra digit. */ 627 if (val <= 0) { 628 val = -val; 629 len++; 630 } 631 while (val > 0) { 632 len++; 633 val /= 10; 634 } 635 636 return (len); 637 } 638 639 static void 640 usage(void) 641 { 642 643 xo_error( 644 "usage: df [-b | -g | -H | -h | -k | -m | -P] [-acilnT] [-t type] [-,]\n" 645 " [file | filesystem ...]\n"); 646 exit(EX_USAGE); 647 } 648 649 static char * 650 makenetvfslist(void) 651 { 652 char *str, *strptr, **listptr; 653 struct xvfsconf *xvfsp, *keep_xvfsp; 654 size_t buflen; 655 int cnt, i, maxvfsconf; 656 657 if (sysctlbyname("vfs.conflist", NULL, &buflen, NULL, 0) < 0) { 658 xo_warn("sysctl(vfs.conflist)"); 659 return (NULL); 660 } 661 xvfsp = malloc(buflen); 662 if (xvfsp == NULL) { 663 xo_warnx("malloc failed"); 664 return (NULL); 665 } 666 keep_xvfsp = xvfsp; 667 if (sysctlbyname("vfs.conflist", xvfsp, &buflen, NULL, 0) < 0) { 668 xo_warn("sysctl(vfs.conflist)"); 669 free(keep_xvfsp); 670 return (NULL); 671 } 672 maxvfsconf = buflen / sizeof(struct xvfsconf); 673 674 if ((listptr = malloc(sizeof(char*) * maxvfsconf)) == NULL) { 675 xo_warnx("malloc failed"); 676 free(keep_xvfsp); 677 return (NULL); 678 } 679 680 for (cnt = 0, i = 0; i < maxvfsconf; i++) { 681 if (xvfsp->vfc_flags & VFCF_NETWORK) { 682 listptr[cnt++] = strdup(xvfsp->vfc_name); 683 if (listptr[cnt-1] == NULL) { 684 xo_warnx("malloc failed"); 685 free(listptr); 686 free(keep_xvfsp); 687 return (NULL); 688 } 689 } 690 xvfsp++; 691 } 692 693 if (cnt == 0 || 694 (str = malloc(sizeof(char) * (32 * cnt + cnt + 2))) == NULL) { 695 if (cnt > 0) 696 xo_warnx("malloc failed"); 697 free(listptr); 698 free(keep_xvfsp); 699 return (NULL); 700 } 701 702 *str = 'n'; *(str + 1) = 'o'; 703 for (i = 0, strptr = str + 2; i < cnt; i++, strptr++) { 704 strlcpy(strptr, listptr[i], 32); 705 strptr += strlen(listptr[i]); 706 *strptr = ','; 707 free(listptr[i]); 708 } 709 *(--strptr) = '\0'; 710 711 free(keep_xvfsp); 712 free(listptr); 713 return (str); 714 } 715