bin/df/df.c

   1 /*
   2  * Copyright (c) 1980, 1990, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  * (c) UNIX System Laboratories, Inc.
   5  * All or some portions of this file are derived from material licensed
   6  * to the University of California by American Telephone and Telegraph
   7  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
   8  * the permission of UNIX System Laboratories, Inc.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. All advertising materials mentioning features or use of this software
  19  *    must display the following acknowledgement:
  20  *      This product includes software developed by the University of
  21  *      California, Berkeley and its contributors.
  22  * 4. Neither the name of the University nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  *
  38  * @(#) Copyright (c) 1980, 1990, 1993, 1994 The Regents of the University of California.  All rights reserved.
  39  * @(#)df.c     8.9 (Berkeley) 5/8/95
  40  * $FreeBSD: src/bin/df/df.c,v 1.23.2.9 2002/07/01 00:14:24 iedowse Exp $
  41  * $DragonFly: src/bin/df/df.c,v 1.9 2007/11/25 18:10:06 swildner Exp $
  42  */
  43
  44 #include <sys/cdefs.h>
  45 #include <sys/param.h>
  46 #include <sys/stat.h>
  47 #include <sys/mount.h>
  48 #include <sys/sysctl.h>
  49
  50 #include <vfs/ufs/dinode.h>
  51 #include <vfs/ufs/fs.h>
  52 #include <vfs/ufs/ufsmount.h>
  53
  54 #include <err.h>
  55 #include <errno.h>
  56 #include <fcntl.h>
  57 #include <fstab.h>
  58 #include <math.h>
  59 #include <stdio.h>
  60 #include <stdlib.h>
  61 #include <string.h>
  62 #include <sysexits.h>
  63 #include <unistd.h>
  64
  65 #define UNITS_SI 1
  66 #define UNITS_2 2
  67
  68 #define KILO_SZ(n) (n)
  69 #define MEGA_SZ(n) ((n) * (n))
  70 #define GIGA_SZ(n) ((n) * (n) * (n))
  71 #define TERA_SZ(n) ((n) * (n) * (n) * (n))
  72 #define PETA_SZ(n) ((n) * (n) * (n) * (n) * (n))
  73
  74 #define KILO_2_SZ (KILO_SZ(1024ULL))
  75 #define MEGA_2_SZ (MEGA_SZ(1024ULL))
  76 #define GIGA_2_SZ (GIGA_SZ(1024ULL))
  77 #define TERA_2_SZ (TERA_SZ(1024ULL))
  78 #define PETA_2_SZ (PETA_SZ(1024ULL))
  79
  80 #define KILO_SI_SZ (KILO_SZ(1000ULL))
  81 #define MEGA_SI_SZ (MEGA_SZ(1000ULL))
  82 #define GIGA_SI_SZ (GIGA_SZ(1000ULL))
  83 #define TERA_SI_SZ (TERA_SZ(1000ULL))
  84 #define PETA_SI_SZ (PETA_SZ(1000ULL))
  85
  86 /* Maximum widths of various fields. */
  87 struct maxwidths {
  88         int mntfrom;
  89         int total;
  90         int used;
  91         int avail;
  92         int iused;
  93         int ifree;
  94 };
  95
  96 unsigned long long vals_si [] = {1, KILO_SI_SZ, MEGA_SI_SZ, GIGA_SI_SZ, TERA_SI_SZ, PETA_SI_SZ};
  97 unsigned long long vals_base2[] = {1, KILO_2_SZ, MEGA_2_SZ, GIGA_2_SZ, TERA_2_SZ, PETA_2_SZ};
  98 unsigned long long *valp;
  99
 100 typedef enum { NONE, KILO, MEGA, GIGA, TERA, PETA, UNIT_MAX } unit_t;
 101
 102 unit_t unitp [] = { NONE, KILO, MEGA, GIGA, TERA, PETA };
 103
 104 int       bread(off_t, void *, int);
 105 int       checkvfsname(const char *, char **);
 106 char     *getmntpt(char *);
 107 int       longwidth(long);
 108 char     *makenetvfslist(void);
 109 char    **makevfslist(char *);
 110 void      prthuman(struct statfs *, long);
 111 void      prthumanval(double);
 112 void      prtstat(struct statfs *, struct maxwidths *);
 113 long      regetmntinfo(struct statfs **, long, char **);
 114 int       ufs_df(char *, struct maxwidths *);
 115 unit_t    unit_adjust(double *);
 116 void      update_maxwidths(struct maxwidths *, struct statfs *);
 117 void      usage(void);
 118
 119 int     aflag = 0, hflag, iflag, nflag;
 120 struct  ufs_args mdev;
 121
 122 static __inline int
 123 imax(int a, int b)
 124 {
 125         return (a > b ? a : b);
 126 }
 127
 128 int
 129 main(int argc, char **argv)
 130 {
 131         struct stat stbuf;
 132         struct statfs statfsbuf, *mntbuf;
 133         struct maxwidths maxwidths;
 134         const char *fstype;
 135         char *mntpath, *mntpt, **vfslist;
 136         long mntsize;
 137         int ch, i, rv;
 138
 139         fstype = "ufs";
 140
 141         vfslist = NULL;
 142         while ((ch = getopt(argc, argv, "abgHhiklmnPt:")) != -1)
 143                 switch (ch) {
 144                 case 'a':
 145                         aflag = 1;
 146                         break;
 147                 case 'b':
 148                                 /* FALLTHROUGH */
 149                 case 'P':
 150                         if (putenv("BLOCKSIZE=512") != 0)
 151                                 warn("putenv: cannot set BLOCKSIZE=512");
 152                         hflag = 0;
 153                         break;
 154                 case 'g':
 155                         if (putenv("BLOCKSIZE=1g") != 0)
 156                                 warn("putenv: cannot set BLOCKSIZE=1g");
 157                         hflag = 0;
 158                         break;
 159                 case 'H':
 160                         hflag = UNITS_SI;
 161                         valp = vals_si;
 162                         break;
 163                 case 'h':
 164                         hflag = UNITS_2;
 165                         valp = vals_base2;
 166                         break;
 167                 case 'i':
 168                         iflag = 1;
 169                         break;
 170                 case 'k':
 171                         if (putenv("BLOCKSIZE=1k") != 0)
 172                                 warn("putenv: cannot set BLOCKSIZE=1k");
 173                         hflag = 0;
 174                         break;
 175                 case 'l':
 176                         if (vfslist != NULL)
 177                                 errx(1, "-l and -t are mutually exclusive.");
 178                         vfslist = makevfslist(makenetvfslist());
 179                         break;
 180                 case 'm':
 181                         if (putenv("BLOCKSIZE=1m") != 0)
 182                                 warn("putenv: cannot set BLOCKSIZE=1m");
 183                         hflag = 0;
 184                         break;
 185                 case 'n':
 186                         nflag = 1;
 187                         break;
 188                 case 't':
 189                         if (vfslist != NULL)
 190                                 errx(1, "only one -t option may be specified");
 191                         fstype = optarg;
 192                         vfslist = makevfslist(optarg);
 193                         break;
 194                 case '?':
 195                 default:
 196                         usage();
 197                 }
 198         argc -= optind;
 199         argv += optind;
 200
 201         mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
 202         bzero(&maxwidths, sizeof(maxwidths));
 203         for (i = 0; i < mntsize; i++)
 204                 update_maxwidths(&maxwidths, &mntbuf[i]);
 205
 206         rv = 0;
 207         if (!*argv) {
 208                 mntsize = regetmntinfo(&mntbuf, mntsize, vfslist);
 209                 bzero(&maxwidths, sizeof(maxwidths));
 210                 for (i = 0; i < mntsize; i++)
 211                         update_maxwidths(&maxwidths, &mntbuf[i]);
 212                 for (i = 0; i < mntsize; i++) {
 213                         if (aflag || (mntbuf[i].f_flags & MNT_IGNORE) == 0)
 214                                 prtstat(&mntbuf[i], &maxwidths);
 215                 }
 216                 exit(rv);
 217         }
 218
 219         for (; *argv; argv++) {
 220                 if (stat(*argv, &stbuf) < 0) {
 221                         if ((mntpt = getmntpt(*argv)) == 0) {
 222                                 warn("%s", *argv);
 223                                 rv = 1;
 224                                 continue;
 225                         }
 226                 } else if (S_ISCHR(stbuf.st_mode)) {
 227                         if ((mntpt = getmntpt(*argv)) == 0) {
 228                                 mdev.fspec = *argv;
 229                                 mntpath = strdup("/tmp/df.XXXXXX");
 230                                 if (mntpath == NULL) {
 231                                         warn("strdup failed");
 232                                         rv = 1;
 233                                         continue;
 234                                 }
 235                                 mntpt = mkdtemp(mntpath);
 236                                 if (mntpt == NULL) {
 237                                         warn("mkdtemp(\"%s\") failed", mntpath);
 238                                         rv = 1;
 239                                         free(mntpath);
 240                                         continue;
 241                                 }
 242                                 if (mount(fstype, mntpt, MNT_RDONLY,
 243                                     &mdev) != 0) {
 244                                         rv = ufs_df(*argv, &maxwidths) || rv;
 245                                         rmdir(mntpt);
 246                                         free(mntpath);
 247                                         continue;
 248                                 } else if (statfs(mntpt, &statfsbuf) == 0) {
 249                                         statfsbuf.f_mntonname[0] = '\0';
 250                                         prtstat(&statfsbuf, &maxwidths);
 251                                 } else {
 252                                         warn("%s", *argv);
 253                                         rv = 1;
 254                                 }
 255                                 unmount(mntpt, 0);
 256                                 rmdir(mntpt);
 257                                 free(mntpath);
 258                                 continue;
 259                         }
 260                 } else
 261                         mntpt = *argv;
 262                 /*
 263                  * Statfs does not take a `wait' flag, so we cannot
 264                  * implement nflag here.
 265                  */
 266                 if (statfs(mntpt, &statfsbuf) < 0) {
 267                         warn("%s", mntpt);
 268                         rv = 1;
 269                         continue;
 270                 }
 271                 if (argc == 1) {
 272                         bzero(&maxwidths, sizeof(maxwidths));
 273                         update_maxwidths(&maxwidths, &statfsbuf);
 274                 }
 275                 prtstat(&statfsbuf, &maxwidths);
 276         }
 277         return (rv);
 278 }
 279
 280 char *
 281 getmntpt(char *name)
 282 {
 283         long 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 (0);
 292 }
 293
 294 /*
 295  * Make a pass over the filesystem info in ``mntbuf'' filtering out
 296  * filesystem types not in vfslist and possibly re-stating to get
 297  * current (not cached) info.  Returns the new count of valid statfs bufs.
 298  */
 299 long
 300 regetmntinfo(struct statfs **mntbufp, long mntsize, char **vfslist)
 301 {
 302         int i, j;
 303         struct statfs *mntbuf;
 304
 305         if (vfslist == NULL)
 306                 return (nflag ? mntsize : getmntinfo(mntbufp, MNT_WAIT));
 307
 308         mntbuf = *mntbufp;
 309         for (j = 0, i = 0; i < mntsize; i++) {
 310                 if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
 311                         continue;
 312                 if (!nflag)
 313                         statfs(mntbuf[i].f_mntonname,&mntbuf[j]);
 314                 else if (i != j)
 315                         mntbuf[j] = mntbuf[i];
 316                 j++;
 317         }
 318         return (j);
 319 }
 320
 321 /*
 322  * Output in "human-readable" format.  Uses 3 digits max and puts
 323  * unit suffixes at the end.  Makes output compact and easy to read,
 324  * especially on huge disks.
 325  *
 326  */
 327 unit_t
 328 unit_adjust(double *val)
 329 {
 330         double abval;
 331         unit_t unit;
 332         unsigned int unit_sz;
 333
 334         abval = fabs(*val);
 335
 336         unit_sz = abval ? ilogb(abval) / 10 : 0;
 337
 338         if (unit_sz >= UNIT_MAX) {
 339                 unit = NONE;
 340         } else {
 341                 unit = unitp[unit_sz];
 342                 *val /= (double)valp[unit_sz];
 343         }
 344
 345         return (unit);
 346 }
 347
 348 void
 349 prthuman(struct statfs *sfsp, long used)
 350 {
 351
 352         prthumanval((double)sfsp->f_blocks * (double)sfsp->f_bsize);
 353         prthumanval((double)used * (double)sfsp->f_bsize);
 354         prthumanval((double)sfsp->f_bavail * (double)sfsp->f_bsize);
 355 }
 356
 357 void
 358 prthumanval(double bytes)
 359 {
 360
 361         unit_t unit;
 362         unit = unit_adjust(&bytes);
 363
 364         if (bytes == 0)
 365                 printf("     0B");
 366         else if (bytes > 10)
 367                 printf(" %5.0f%c", bytes, "BKMGTPE"[unit]);
 368         else
 369                 printf(" %5.1f%c", bytes, "BKMGTPE"[unit]);
 370 }
 371
 372 /*
 373  * Convert statfs returned filesystem size into BLOCKSIZE units.
 374  * Attempts to avoid overflow for large filesystems.
 375  */
 376 #define fsbtoblk(num, fsbs, bs) \
 377         (((fsbs) != 0 && (fsbs) < (bs)) ? \
 378                 (num) / ((bs) / (fsbs)) : (num) * ((fsbs) / (bs)))
 379
 380 /*
 381  * Print out status about a filesystem.
 382  */
 383 void
 384 prtstat(struct statfs *sfsp, struct maxwidths *mwp)
 385 {
 386         static long blocksize;
 387         static int headerlen, timesthrough;
 388         static const char *header;
 389         long used, availblks, inodes;
 390
 391         if (++timesthrough == 1) {
 392                 mwp->mntfrom = imax(mwp->mntfrom, strlen("Filesystem"));
 393                 if (hflag) {
 394                         header = "  Size";
 395                         mwp->total = mwp->used = mwp->avail = strlen(header);
 396                 } else {
 397                         header = getbsize(&headerlen, &blocksize);
 398                         mwp->total = imax(mwp->total, headerlen);
 399                 }
 400                 mwp->used = imax(mwp->used, strlen("Used"));
 401                 mwp->avail = imax(mwp->avail, strlen("Avail"));
 402
 403                 printf("%-*s %-*s %*s %*s Capacity", mwp->mntfrom,
 404                     "Filesystem", mwp->total, header, mwp->used, "Used",
 405                     mwp->avail, "Avail");
 406                 if (iflag) {
 407                         mwp->iused = imax(mwp->iused, strlen("  iused"));
 408                         mwp->ifree = imax(mwp->ifree, strlen("ifree"));
 409                         printf(" %*s %*s %%iused", mwp->iused - 2,
 410                             "iused", mwp->ifree, "ifree");
 411                 }
 412                 printf("  Mounted on\n");
 413         }
 414         printf("%-*s", mwp->mntfrom, sfsp->f_mntfromname);
 415         used = sfsp->f_blocks - sfsp->f_bfree;
 416         availblks = sfsp->f_bavail + used;
 417         if (hflag) {
 418                 prthuman(sfsp, used);
 419         } else {
 420                 printf(" %*ld %*ld %*ld", mwp->total,
 421                     fsbtoblk(sfsp->f_blocks, sfsp->f_bsize, blocksize),
 422                     mwp->used, fsbtoblk(used, sfsp->f_bsize, blocksize),
 423                     mwp->avail, fsbtoblk(sfsp->f_bavail, sfsp->f_bsize,
 424                     blocksize));
 425         }
 426         printf(" %5.0f%%",
 427             availblks == 0 ? 100.0 : (double)used / (double)availblks * 100.0);
 428         if (iflag) {
 429                 inodes = sfsp->f_files;
 430                 used = inodes - sfsp->f_ffree;
 431                 printf(" %*ld %*ld %4.0f%% ", mwp->iused, used,
 432                     mwp->ifree, sfsp->f_ffree, inodes == 0 ? 100.0 :
 433                     (double)used / (double)inodes * 100.0);
 434         } else
 435                 printf("  ");
 436         printf("  %s\n", sfsp->f_mntonname);
 437 }
 438
 439 /*
 440  * Update the maximum field-width information in `mwp' based on
 441  * the filesystem specified by `sfsp'.
 442  */
 443 void
 444 update_maxwidths(struct maxwidths *mwp, struct statfs *sfsp)
 445 {
 446         static long blocksize;
 447         int dummy;
 448
 449         if (blocksize == 0)
 450                 getbsize(&dummy, &blocksize);
 451
 452         mwp->mntfrom = imax(mwp->mntfrom, strlen(sfsp->f_mntfromname));
 453         mwp->total = imax(mwp->total, longwidth(fsbtoblk(sfsp->f_blocks,
 454             sfsp->f_bsize, blocksize)));
 455         mwp->used = imax(mwp->used, longwidth(fsbtoblk(sfsp->f_blocks -
 456             sfsp->f_bfree, sfsp->f_bsize, blocksize)));
 457         mwp->avail = imax(mwp->avail, longwidth(fsbtoblk(sfsp->f_bavail,
 458             sfsp->f_bsize, blocksize)));
 459         mwp->iused = imax(mwp->iused, longwidth(sfsp->f_files -
 460             sfsp->f_ffree));
 461         mwp->ifree = imax(mwp->ifree, longwidth(sfsp->f_ffree));
 462 }
 463
 464 /* Return the width in characters of the specified long. */
 465 int
 466 longwidth(long val)
 467 {
 468         int len;
 469
 470         len = 0;
 471         /* Negative or zero values require one extra digit. */
 472         if (val <= 0) {
 473                 val = -val;
 474                 len++;
 475         }
 476         while (val > 0) {
 477                 len++;
 478                 val /= 10;
 479         }
 480
 481         return (len);
 482 }
 483
 484 /*
 485  * This code constitutes the pre-system call Berkeley df code for extracting
 486  * information from filesystem superblocks.
 487  */
 488
 489 union {
 490         struct fs iu_fs;
 491         char dummy[SBSIZE];
 492 } sb;
 493 #define sblock sb.iu_fs
 494
 495 int     rfd;
 496
 497 int
 498 ufs_df(char *file, struct maxwidths *mwp)
 499 {
 500         struct statfs statfsbuf;
 501         struct statfs *sfsp;
 502         const char *mntpt;
 503         static int synced;
 504
 505         if (synced++ == 0)
 506                 sync();
 507
 508         if ((rfd = open(file, O_RDONLY)) < 0) {
 509                 warn("%s", file);
 510                 return (1);
 511         }
 512         if (bread((off_t)SBOFF, &sblock, SBSIZE) == 0) {
 513                 close(rfd);
 514                 return (1);
 515         }
 516         sfsp = &statfsbuf;
 517         sfsp->f_type = 1;
 518         strcpy(sfsp->f_fstypename, "ufs");
 519         sfsp->f_flags = 0;
 520         sfsp->f_bsize = sblock.fs_fsize;
 521         sfsp->f_iosize = sblock.fs_bsize;
 522         sfsp->f_blocks = sblock.fs_dsize;
 523         sfsp->f_bfree = sblock.fs_cstotal.cs_nbfree * sblock.fs_frag +
 524                 sblock.fs_cstotal.cs_nffree;
 525         sfsp->f_bavail = freespace(&sblock, sblock.fs_minfree);
 526         sfsp->f_files =  sblock.fs_ncg * sblock.fs_ipg;
 527         sfsp->f_ffree = sblock.fs_cstotal.cs_nifree;
 528         sfsp->f_fsid.val[0] = 0;
 529         sfsp->f_fsid.val[1] = 0;
 530         if ((mntpt = getmntpt(file)) == 0)
 531                 mntpt = "";
 532         memmove(&sfsp->f_mntonname[0], mntpt, (size_t)MNAMELEN);
 533         memmove(&sfsp->f_mntfromname[0], file, (size_t)MNAMELEN);
 534         prtstat(sfsp, mwp);
 535         close(rfd);
 536         return (0);
 537 }
 538
 539 int
 540 bread(off_t off, void *buf, int cnt)
 541 {
 542         ssize_t nr;
 543
 544         lseek(rfd, off, SEEK_SET);
 545         if ((nr = read(rfd, buf, (size_t)cnt)) != (ssize_t)cnt) {
 546                 /* Probably a dismounted disk if errno == EIO. */
 547                 if (errno != EIO)
 548                         fprintf(stderr, "\ndf: %lld: %s\n",
 549                             (long long)off, strerror(nr > 0 ? EIO : errno));
 550                 return (0);
 551         }
 552         return (1);
 553 }
 554
 555 void
 556 usage(void)
 557 {
 558
 559         fprintf(stderr,
 560             "usage: df [-b | -H | -h | -k | -m | -P] [-ailn] [-t type] [file | filesystem ...]\n");
 561         exit(EX_USAGE);
 562 }
 563
 564 char *
 565 makenetvfslist(void)
 566 {
 567         char *str, *strptr, **listptr;
 568         int mib[3], maxvfsconf, cnt=0, i;
 569         size_t miblen;
 570         struct ovfsconf *ptr;
 571
 572         mib[0] = CTL_VFS; mib[1] = VFS_GENERIC; mib[2] = VFS_MAXTYPENUM;
 573         miblen=sizeof(maxvfsconf);
 574         if (sysctl(mib, (unsigned int)(sizeof(mib) / sizeof(mib[0])),
 575             &maxvfsconf, &miblen, NULL, 0)) {
 576                 warnx("sysctl failed");
 577                 return (NULL);
 578         }
 579
 580         if ((listptr = malloc(sizeof(char*) * maxvfsconf)) == NULL) {
 581                 warnx("malloc failed");
 582                 return (NULL);
 583         }
 584
 585         for (ptr = getvfsent(); ptr; ptr = getvfsent())
 586                 if (ptr->vfc_flags & VFCF_NETWORK) {
 587                         listptr[cnt++] = strdup(ptr->vfc_name);
 588                         if (listptr[cnt-1] == NULL) {
 589                                 warnx("malloc failed");
 590                                 return (NULL);
 591                         }
 592                 }
 593
 594         if (cnt == 0 ||
 595             (str = malloc(sizeof(char) * (32 * cnt + cnt + 2))) == NULL) {
 596                 if (cnt > 0)
 597                         warnx("malloc failed");
 598                 free(listptr);
 599                 return (NULL);
 600         }
 601
 602         *str = 'n'; *(str + 1) = 'o';
 603         for (i = 0, strptr = str + 2; i < cnt; i++, strptr++) {
 604                 strncpy(strptr, listptr[i], 32);
 605                 strptr += strlen(listptr[i]);
 606                 *strptr = ',';
 607                 free(listptr[i]);
 608         }
 609         *(--strptr) = '\0';
 610
 611         free(listptr);
 612         return (str);
 613 }