usr.bin/quota/quota.c

   1 /*
   2  * Copyright (c) 1980, 1990, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Robert Elz at The University of Melbourne.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. 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 #ifndef lint
  38 static const char copyright[] =
  39 "@(#) Copyright (c) 1980, 1990, 1993\n\
  40         The Regents of the University of California.  All rights reserved.\n";
  41 #endif
  42
  43 #ifndef lint
  44 static const char sccsid[] = "from: @(#)quota.c 8.1 (Berkeley) 6/6/93";
  45 #endif /* not lint */
  46
  47 /*
  48  * Disk quota reporting program.
  49  */
  50 #include <sys/cdefs.h>
  51 __FBSDID("$FreeBSD$");
  52
  53 #include <sys/param.h>
  54 #include <sys/types.h>
  55 #include <sys/file.h>
  56 #include <sys/stat.h>
  57 #include <sys/mount.h>
  58 #include <sys/socket.h>
  59
  60 #include <rpc/rpc.h>
  61 #include <rpc/pmap_prot.h>
  62 #include <rpcsvc/rquota.h>
  63
  64 #include <ufs/ufs/quota.h>
  65
  66 #include <ctype.h>
  67 #include <err.h>
  68 #include <fstab.h>
  69 #include <grp.h>
  70 #include <netdb.h>
  71 #include <pwd.h>
  72 #include <stdio.h>
  73 #include <stdlib.h>
  74 #include <string.h>
  75 #include <unistd.h>
  76
  77 const char *qfname = QUOTAFILENAME;
  78 const char *qfextension[] = INITQFNAMES;
  79
  80 struct quotause {
  81         struct  quotause *next;
  82         long    flags;
  83         struct  dqblk dqblk;
  84         char    fsname[MAXPATHLEN + 1];
  85 };
  86 #define FOUND   0x01
  87
  88 static const char *timeprt(time_t seconds);
  89 static struct quotause *getprivs(long id, int quotatype);
  90 static void usage(void);
  91 static void showuid(u_long uid);
  92 static void showgid(u_long gid);
  93 static void showusrname(char *name);
  94 static void showgrpname(char *name);
  95 static void showquotas(int type, u_long id, const char *name);
  96 static void heading(int type, u_long id, const char *name, const char *tag);
  97 static int ufshasquota(struct fstab *fs, int type, char **qfnamep);
  98 static int getufsquota(struct fstab *fs, struct quotause *qup, long id,
  99         int quotatype);
 100 static int getnfsquota(struct statfs *fst, struct quotause *qup, long id,
 101         int quotatype);
 102 static int callaurpc(char *host, int prognum, int versnum, int procnum,
 103         xdrproc_t inproc, char *in, xdrproc_t outproc, char *out);
 104 static int alldigits(char *s);
 105
 106 int     lflag;
 107 int     qflag;
 108 int     vflag;
 109
 110 int
 111 main(int argc, char *argv[])
 112 {
 113         int ngroups;
 114         gid_t mygid, gidset[NGROUPS];
 115         int i, ch, gflag = 0, uflag = 0;
 116
 117         while ((ch = getopt(argc, argv, "glquv")) != -1) {
 118                 switch(ch) {
 119                 case 'g':
 120                         gflag++;
 121                         break;
 122                 case 'l':
 123                         lflag++;
 124                         break;
 125                 case 'q':
 126                         qflag++;
 127                         break;
 128                 case 'u':
 129                         uflag++;
 130                         break;
 131                 case 'v':
 132                         vflag++;
 133                         break;
 134                 default:
 135                         usage();
 136                 }
 137         }
 138         argc -= optind;
 139         argv += optind;
 140         if (!uflag && !gflag)
 141                 uflag++;
 142         if (argc == 0) {
 143                 if (uflag)
 144                         showuid(getuid());
 145                 if (gflag) {
 146                         mygid = getgid();
 147                         ngroups = getgroups(NGROUPS, gidset);
 148                         if (ngroups < 0)
 149                                 err(1, "getgroups");
 150                         showgid(mygid);
 151                         for (i = 0; i < ngroups; i++)
 152                                 if (gidset[i] != mygid)
 153                                         showgid(gidset[i]);
 154                 }
 155                 return(0);
 156         }
 157         if (uflag && gflag)
 158                 usage();
 159         if (uflag) {
 160                 for (; argc > 0; argc--, argv++) {
 161                         if (alldigits(*argv))
 162                                 showuid(atoi(*argv));
 163                         else
 164                                 showusrname(*argv);
 165                 }
 166                 return(0);
 167         }
 168         if (gflag) {
 169                 for (; argc > 0; argc--, argv++) {
 170                         if (alldigits(*argv))
 171                                 showgid(atoi(*argv));
 172                         else
 173                                 showgrpname(*argv);
 174                 }
 175         }
 176         return(0);
 177 }
 178
 179 static void
 180 usage(void)
 181 {
 182
 183         fprintf(stderr, "%s\n%s\n%s\n",
 184             "usage: quota [-glu] [-v | -q]",
 185             "       quota [-lu] [-v | -q] user ...",
 186             "       quota -g [-l] [-v | -q] group ...");
 187         exit(1);
 188 }
 189
 190 /*
 191  * Print out quotas for a specified user identifier.
 192  */
 193 static void
 194 showuid(u_long uid)
 195 {
 196         struct passwd *pwd = getpwuid(uid);
 197         const char *name;
 198
 199         if (pwd == NULL)
 200                 name = "(no account)";
 201         else
 202                 name = pwd->pw_name;
 203         showquotas(USRQUOTA, uid, name);
 204 }
 205
 206 /*
 207  * Print out quotas for a specifed user name.
 208  */
 209 static void
 210 showusrname(char *name)
 211 {
 212         struct passwd *pwd = getpwnam(name);
 213
 214         if (pwd == NULL) {
 215                 warnx("%s: unknown user", name);
 216                 return;
 217         }
 218         showquotas(USRQUOTA, pwd->pw_uid, name);
 219 }
 220
 221 /*
 222  * Print out quotas for a specified group identifier.
 223  */
 224 static void
 225 showgid(u_long gid)
 226 {
 227         struct group *grp = getgrgid(gid);
 228         const char *name;
 229
 230         if (grp == NULL)
 231                 name = "(no entry)";
 232         else
 233                 name = grp->gr_name;
 234         showquotas(GRPQUOTA, gid, name);
 235 }
 236
 237 /*
 238  * Print out quotas for a specifed group name.
 239  */
 240 static void
 241 showgrpname(char *name)
 242 {
 243         struct group *grp = getgrnam(name);
 244
 245         if (grp == NULL) {
 246                 warnx("%s: unknown group", name);
 247                 return;
 248         }
 249         showquotas(GRPQUOTA, grp->gr_gid, name);
 250 }
 251
 252 static void
 253 showquotas(int type, u_long id, const char *name)
 254 {
 255         struct quotause *qup;
 256         struct quotause *quplist;
 257         const char *msgi, *msgb;
 258         const char *nam;
 259         int lines = 0;
 260         static time_t now;
 261
 262         if (now == 0)
 263                 time(&now);
 264         quplist = getprivs(id, type);
 265         for (qup = quplist; qup; qup = qup->next) {
 266                 if (!vflag &&
 267                     qup->dqblk.dqb_isoftlimit == 0 &&
 268                     qup->dqblk.dqb_ihardlimit == 0 &&
 269                     qup->dqblk.dqb_bsoftlimit == 0 &&
 270                     qup->dqblk.dqb_bhardlimit == 0)
 271                         continue;
 272                 msgi = (char *)0;
 273                 if (qup->dqblk.dqb_ihardlimit &&
 274                     qup->dqblk.dqb_curinodes >= qup->dqblk.dqb_ihardlimit)
 275                         msgi = "File limit reached on";
 276                 else if (qup->dqblk.dqb_isoftlimit &&
 277                     qup->dqblk.dqb_curinodes >= qup->dqblk.dqb_isoftlimit) {
 278                         if (qup->dqblk.dqb_itime > now)
 279                                 msgi = "In file grace period on";
 280                         else
 281                                 msgi = "Over file quota on";
 282                 }
 283                 msgb = (char *)0;
 284                 if (qup->dqblk.dqb_bhardlimit &&
 285                     qup->dqblk.dqb_curblocks >= qup->dqblk.dqb_bhardlimit)
 286                         msgb = "Block limit reached on";
 287                 else if (qup->dqblk.dqb_bsoftlimit &&
 288                     qup->dqblk.dqb_curblocks >= qup->dqblk.dqb_bsoftlimit) {
 289                         if (qup->dqblk.dqb_btime > now)
 290                                 msgb = "In block grace period on";
 291                         else
 292                                 msgb = "Over block quota on";
 293                 }
 294                 if (qflag) {
 295                         if ((msgi != (char *)0 || msgb != (char *)0) &&
 296                             lines++ == 0)
 297                                 heading(type, id, name, "");
 298                         if (msgi != (char *)0)
 299                                 printf("\t%s %s\n", msgi, qup->fsname);
 300                         if (msgb != (char *)0)
 301                                 printf("\t%s %s\n", msgb, qup->fsname);
 302                         continue;
 303                 }
 304                 if (vflag ||
 305                     qup->dqblk.dqb_curblocks ||
 306                     qup->dqblk.dqb_curinodes) {
 307                         if (lines++ == 0)
 308                                 heading(type, id, name, "");
 309                         nam = qup->fsname;
 310                         if (strlen(qup->fsname) > 15) {
 311                                 printf("%s\n", qup->fsname);
 312                                 nam = "";
 313                         }
 314                         printf("%15s%8lu%c%7lu%8lu%8s"
 315                                 , nam
 316                                 , (u_long) (dbtob(qup->dqblk.dqb_curblocks)
 317                                             / 1024)
 318                                 , (msgb == (char *)0) ? ' ' : '*'
 319                                 , (u_long) (dbtob(qup->dqblk.dqb_bsoftlimit)
 320                                             / 1024)
 321                                 , (u_long) (dbtob(qup->dqblk.dqb_bhardlimit)
 322                                             / 1024)
 323                                 , (msgb == (char *)0) ? ""
 324                                     :timeprt(qup->dqblk.dqb_btime));
 325                         printf("%8lu%c%7lu%8lu%8s\n"
 326                                 , (u_long)qup->dqblk.dqb_curinodes
 327                                 , (msgi == (char *)0) ? ' ' : '*'
 328                                 , (u_long)qup->dqblk.dqb_isoftlimit
 329                                 , (u_long)qup->dqblk.dqb_ihardlimit
 330                                 , (msgi == (char *)0) ? ""
 331                                     : timeprt(qup->dqblk.dqb_itime)
 332                         );
 333                         continue;
 334                 }
 335         }
 336         if (!qflag && lines == 0)
 337                 heading(type, id, name, "none");
 338 }
 339
 340 static void
 341 heading(int type, u_long id, const char *name, const char *tag)
 342 {
 343
 344         printf("Disk quotas for %s %s (%cid %lu): %s\n", qfextension[type],
 345             name, *qfextension[type], id, tag);
 346         if (!qflag && tag[0] == '\0') {
 347                 printf("%15s%8s %7s%8s%8s%8s %7s%8s%8s\n"
 348                         , "Filesystem"
 349                         , "usage"
 350                         , "quota"
 351                         , "limit"
 352                         , "grace"
 353                         , "files"
 354                         , "quota"
 355                         , "limit"
 356                         , "grace"
 357                 );
 358         }
 359 }
 360
 361 /*
 362  * Calculate the grace period and return a printable string for it.
 363  */
 364 static const char *
 365 timeprt(time_t seconds)
 366 {
 367         time_t hours, minutes;
 368         static char buf[20];
 369         static time_t now;
 370
 371         if (now == 0)
 372                 time(&now);
 373         if (now > seconds)
 374                 return ("none");
 375         seconds -= now;
 376         minutes = (seconds + 30) / 60;
 377         hours = (minutes + 30) / 60;
 378         if (hours >= 36) {
 379                 sprintf(buf, "%lddays", ((long)hours + 12) / 24);
 380                 return (buf);
 381         }
 382         if (minutes >= 60) {
 383                 sprintf(buf, "%2ld:%ld", (long)minutes / 60,
 384                     (long)minutes % 60);
 385                 return (buf);
 386         }
 387         sprintf(buf, "%2ld", (long)minutes);
 388         return (buf);
 389 }
 390
 391 /*
 392  * Collect the requested quota information.
 393  */
 394 static struct quotause *
 395 getprivs(long id, int quotatype)
 396 {
 397         struct quotause *qup, *quptail = NULL;
 398         struct fstab *fs;
 399         struct quotause *quphead;
 400         struct statfs *fst;
 401         int nfst, i;
 402
 403         qup = quphead = (struct quotause *)0;
 404
 405         nfst = getmntinfo(&fst, MNT_NOWAIT);
 406         if (nfst == 0)
 407                 errx(2, "no filesystems mounted!");
 408         setfsent();
 409         for (i=0; i<nfst; i++) {
 410                 if (qup == NULL) {
 411                         if ((qup = (struct quotause *)malloc(sizeof *qup))
 412                             == NULL)
 413                                 errx(2, "out of memory");
 414                 }
 415                 if (strcmp(fst[i].f_fstypename, "nfs") == 0) {
 416                         if (lflag)
 417                                 continue;
 418                         if (getnfsquota(&fst[i], qup, id, quotatype)
 419                             == 0)
 420                                 continue;
 421                 } else if (strcmp(fst[i].f_fstypename, "ufs") == 0) {
 422                         /*
 423                          * XXX
 424                          * UFS filesystems must be in /etc/fstab, and must
 425                          * indicate that they have quotas on (?!) This is quite
 426                          * unlike SunOS where quotas can be enabled/disabled
 427                          * on a filesystem independent of /etc/fstab, and it
 428                          * will still print quotas for them.
 429                          */
 430                         if ((fs = getfsspec(fst[i].f_mntfromname)) == NULL)
 431                                 continue;
 432                         if (getufsquota(fs, qup, id, quotatype) == 0)
 433                                 continue;
 434                 } else
 435                         continue;
 436                 strcpy(qup->fsname, fst[i].f_mntonname);
 437                 if (quphead == NULL)
 438                         quphead = qup;
 439                 else
 440                         quptail->next = qup;
 441                 quptail = qup;
 442                 quptail->next = 0;
 443                 qup = NULL;
 444         }
 445         if (qup)
 446                 free(qup);
 447         endfsent();
 448         return (quphead);
 449 }
 450
 451 /*
 452  * Check to see if a particular quota is to be enabled.
 453  */
 454 static int
 455 ufshasquota(struct fstab *fs, int type, char **qfnamep)
 456 {
 457         static char initname, usrname[100], grpname[100];
 458         static char buf[BUFSIZ];
 459         char *opt, *cp;
 460
 461         if (!initname) {
 462                 sprintf(usrname, "%s%s", qfextension[USRQUOTA], qfname);
 463                 sprintf(grpname, "%s%s", qfextension[GRPQUOTA], qfname);
 464                 initname = 1;
 465         }
 466         strcpy(buf, fs->fs_mntops);
 467         for (opt = strtok(buf, ","); opt; opt = strtok(NULL, ",")) {
 468                 if ((cp = index(opt, '=')))
 469                         *cp++ = '\0';
 470                 if (type == USRQUOTA && strcmp(opt, usrname) == 0)
 471                         break;
 472                 if (type == GRPQUOTA && strcmp(opt, grpname) == 0)
 473                         break;
 474         }
 475         if (!opt)
 476                 return (0);
 477         if (cp) {
 478                 *qfnamep = cp;
 479                 return (1);
 480         }
 481         (void) sprintf(buf, "%s/%s.%s", fs->fs_file, qfname, qfextension[type]);
 482         *qfnamep = buf;
 483         return (1);
 484 }
 485
 486 static int
 487 getufsquota(struct fstab *fs, struct quotause *qup, long id, int quotatype)
 488 {
 489         char *qfpathname;
 490         int fd, qcmd;
 491
 492         qcmd = QCMD(Q_GETQUOTA, quotatype);
 493         if (!ufshasquota(fs, quotatype, &qfpathname))
 494                 return (0);
 495
 496         if (quotactl(fs->fs_file, qcmd, id, (char *)&qup->dqblk) != 0) {
 497                 if ((fd = open(qfpathname, O_RDONLY)) < 0) {
 498                         warn("%s", qfpathname);
 499                         return (0);
 500                 }
 501                 (void) lseek(fd, (off_t)(id * sizeof(struct dqblk)), L_SET);
 502                 switch (read(fd, &qup->dqblk, sizeof(struct dqblk))) {
 503                 case 0:                         /* EOF */
 504                         /*
 505                          * Convert implicit 0 quota (EOF)
 506                          * into an explicit one (zero'ed dqblk)
 507                          */
 508                         bzero((caddr_t)&qup->dqblk, sizeof(struct dqblk));
 509                         break;
 510                 case sizeof(struct dqblk):      /* OK */
 511                         break;
 512                 default:                /* ERROR */
 513                         warn("read error: %s", qfpathname);
 514                         close(fd);
 515                         return (0);
 516                 }
 517                 close(fd);
 518         }
 519         return (1);
 520 }
 521
 522 static int
 523 getnfsquota(struct statfs *fst, struct quotause *qup, long id, int quotatype)
 524 {
 525         struct getquota_args gq_args;
 526         struct getquota_rslt gq_rslt;
 527         struct dqblk *dqp = &qup->dqblk;
 528         struct timeval tv;
 529         char *cp;
 530
 531         if (fst->f_flags & MNT_LOCAL)
 532                 return (0);
 533
 534         /*
 535          * rpc.rquotad does not support group quotas
 536          */
 537         if (quotatype != USRQUOTA)
 538                 return (0);
 539
 540         /*
 541          * must be some form of "hostname:/path"
 542          */
 543         cp = strchr(fst->f_mntfromname, ':');
 544         if (cp == NULL) {
 545                 warnx("cannot find hostname for %s", fst->f_mntfromname);
 546                 return (0);
 547         }
 548
 549         *cp = '\0';
 550         if (*(cp+1) != '/') {
 551                 *cp = ':';
 552                 return (0);
 553         }
 554
 555         /* Avoid attempting the RPC for special amd(8) filesystems. */
 556         if (strncmp(fst->f_mntfromname, "pid", 3) == 0 &&
 557             strchr(fst->f_mntfromname, '@') != NULL) {
 558                 *cp = ':';
 559                 return (0);
 560         }
 561
 562         gq_args.gqa_pathp = cp + 1;
 563         gq_args.gqa_uid = id;
 564         if (callaurpc(fst->f_mntfromname, RQUOTAPROG, RQUOTAVERS,
 565             RQUOTAPROC_GETQUOTA, (xdrproc_t)xdr_getquota_args, (char *)&gq_args,
 566             (xdrproc_t)xdr_getquota_rslt, (char *)&gq_rslt) != 0) {
 567                 *cp = ':';
 568                 return (0);
 569         }
 570
 571         switch (gq_rslt.status) {
 572         case Q_NOQUOTA:
 573                 break;
 574         case Q_EPERM:
 575                 warnx("quota permission error, host: %s",
 576                         fst->f_mntfromname);
 577                 break;
 578         case Q_OK:
 579                 gettimeofday(&tv, NULL);
 580                         /* blocks*/
 581                 dqp->dqb_bhardlimit =
 582                     gq_rslt.getquota_rslt_u.gqr_rquota.rq_bhardlimit *
 583                     (gq_rslt.getquota_rslt_u.gqr_rquota.rq_bsize / DEV_BSIZE);
 584                 dqp->dqb_bsoftlimit =
 585                     gq_rslt.getquota_rslt_u.gqr_rquota.rq_bsoftlimit *
 586                     (gq_rslt.getquota_rslt_u.gqr_rquota.rq_bsize / DEV_BSIZE);
 587                 dqp->dqb_curblocks =
 588                     gq_rslt.getquota_rslt_u.gqr_rquota.rq_curblocks *
 589                     (gq_rslt.getquota_rslt_u.gqr_rquota.rq_bsize / DEV_BSIZE);
 590                         /* inodes */
 591                 dqp->dqb_ihardlimit =
 592                         gq_rslt.getquota_rslt_u.gqr_rquota.rq_fhardlimit;
 593                 dqp->dqb_isoftlimit =
 594                         gq_rslt.getquota_rslt_u.gqr_rquota.rq_fsoftlimit;
 595                 dqp->dqb_curinodes =
 596                         gq_rslt.getquota_rslt_u.gqr_rquota.rq_curfiles;
 597                         /* grace times */
 598                 dqp->dqb_btime =
 599                     tv.tv_sec + gq_rslt.getquota_rslt_u.gqr_rquota.rq_btimeleft;
 600                 dqp->dqb_itime =
 601                     tv.tv_sec + gq_rslt.getquota_rslt_u.gqr_rquota.rq_ftimeleft;
 602                 *cp = ':';
 603                 return (1);
 604         default:
 605                 warnx("bad rpc result, host: %s", fst->f_mntfromname);
 606                 break;
 607         }
 608         *cp = ':';
 609         return (0);
 610 }
 611
 612 static int
 613 callaurpc(char *host, int prognum, int versnum, int procnum,
 614     xdrproc_t inproc, char *in, xdrproc_t outproc, char *out)
 615 {
 616         struct sockaddr_in server_addr;
 617         enum clnt_stat clnt_stat;
 618         struct hostent *hp;
 619         struct timeval timeout, tottimeout;
 620
 621         CLIENT *client = NULL;
 622         int sock = RPC_ANYSOCK;
 623
 624         if ((hp = gethostbyname(host)) == NULL)
 625                 return ((int) RPC_UNKNOWNHOST);
 626         timeout.tv_usec = 0;
 627         timeout.tv_sec = 6;
 628         bcopy(hp->h_addr, &server_addr.sin_addr,
 629                         MIN(hp->h_length,(int)sizeof(server_addr.sin_addr)));
 630         server_addr.sin_family = AF_INET;
 631         server_addr.sin_port =  0;
 632
 633         if ((client = clntudp_create(&server_addr, prognum,
 634             versnum, timeout, &sock)) == NULL)
 635                 return ((int) rpc_createerr.cf_stat);
 636
 637         client->cl_auth = authunix_create_default();
 638         tottimeout.tv_sec = 25;
 639         tottimeout.tv_usec = 0;
 640         clnt_stat = clnt_call(client, procnum, inproc, in,
 641             outproc, out, tottimeout);
 642
 643         return ((int) clnt_stat);
 644 }
 645
 646 static int
 647 alldigits(char *s)
 648 {
 649         int c;
 650
 651         c = *s++;
 652         do {
 653                 if (!isdigit(c))
 654                         return (0);
 655         } while ((c = *s++));
 656         return (1);
 657 }