mtree/spec.c

   1 /*-
   2  * Copyright (c) 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #if 0
  31 #ifndef lint
  32 static char sccsid[] = "@(#)spec.c      8.1 (Berkeley) 6/6/93";
  33 #endif /* not lint */
  34 #endif
  35 #include <sys/cdefs.h>
  36 __FBSDID("$FreeBSD: src/usr.sbin/mtree/spec.c,v 1.22 2005/03/29 11:44:17 tobez Exp $");
  37
  38 #include <sys/types.h>
  39 #include <sys/stat.h>
  40 #include <ctype.h>
  41 #include <err.h>
  42 #include <errno.h>
  43 #include <fts.h>
  44 #include <grp.h>
  45 #include <pwd.h>
  46 #include <stdio.h>
  47 #include <stdint.h>
  48 #include <unistd.h>
  49 #include <vis.h>
  50 #include "metrics.h"
  51 #include "mtree.h"
  52 #include "extern.h"
  53
  54 int lineno;                             /* Current spec line number. */
  55
  56 static void      set(char *, NODE *);
  57 static void      unset(char *, NODE *);
  58
  59 NODE *
  60 mtree_readspec(FILE *fi)
  61 {
  62         NODE *centry, *last;
  63         char *p;
  64         NODE ginfo, *root;
  65         int c_cur, c_next;
  66         char buf[2048];
  67
  68         centry = last = root = NULL;
  69         bzero(&ginfo, sizeof(ginfo));
  70         c_cur = c_next = 0;
  71         for (lineno = 1; fgets(buf, sizeof(buf), fi);
  72             ++lineno, c_cur = c_next, c_next = 0) {
  73                 /* Skip empty lines. */
  74                 if (buf[0] == '\n')
  75                         continue;
  76
  77                 /* Find end of line. */
  78                 if ((p = index(buf, '\n')) == NULL) {
  79                         RECORD_FAILURE(21, ERANGE);
  80                         errx(1, "line %d too long", lineno);
  81                 }
  82
  83                 /* See if next line is continuation line. */
  84                 if (p[-1] == '\\') {
  85                         --p;
  86                         c_next = 1;
  87                 }
  88
  89                 /* Null-terminate the line. */
  90                 *p = '\0';
  91
  92                 /* Skip leading whitespace. */
  93                 for (p = buf; *p && isspace(*p); ++p);
  94
  95                 /* If nothing but whitespace or comment char, continue. */
  96                 if (!*p || *p == '#')
  97                         continue;
  98
  99 #ifdef DEBUG
 100                 (void)fprintf(stderr, "line %d: {%s}\n", lineno, p);
 101 #endif
 102                 if (c_cur) {
 103                         set(p, centry);
 104                         continue;
 105                 }
 106
 107                 /* Grab file name, "$", "set", or "unset". */
 108                 if ((p = strtok(p, "\n\t ")) == NULL) {
 109                         RECORD_FAILURE(22, EINVAL);
 110                         errx(1, "line %d: missing field", lineno);
 111                 }
 112
 113                 if (p[0] == '/')
 114                         switch(p[1]) {
 115                         case 's':
 116                                 if (strcmp(p + 1, "set"))
 117                                         break;
 118                                 set(NULL, &ginfo);
 119                                 continue;
 120                         case 'u':
 121                                 if (strcmp(p + 1, "unset"))
 122                                         break;
 123                                 unset(NULL, &ginfo);
 124                                 continue;
 125                         }
 126
 127                 if (index(p, '/')) {
 128                         RECORD_FAILURE(23, EINVAL);
 129                         errx(1, "line %d: slash character in file name",
 130                         lineno);
 131                 }
 132
 133                 if (!strcmp(p, "..")) {
 134                         /* Don't go up, if haven't gone down. */
 135                         if (!root)
 136                                 goto noparent;
 137                         if (last->type != F_DIR || last->flags & F_DONE) {
 138                                 if (last == root)
 139                                         goto noparent;
 140                                 last = last->parent;
 141                         }
 142                         last->flags |= F_DONE;
 143                         continue;
 144
 145 noparent:               RECORD_FAILURE(24, EINVAL);
 146                         errx(1, "line %d: no parent node", lineno);
 147                 }
 148
 149                 if ((centry = calloc(1, sizeof(NODE) + strlen(p))) == NULL) {
 150                         RECORD_FAILURE(25, ENOMEM);
 151                         errx(1, "calloc");
 152                 }
 153                 *centry = ginfo;
 154 #define MAGIC   "?*["
 155                 if (strpbrk(p, MAGIC))
 156                         centry->flags |= F_MAGIC;
 157                 if (strunvis(centry->name, p) == -1) {
 158                         RECORD_FAILURE(26, EILSEQ);
 159                         errx(1, "filename %s is ill-encoded", p);
 160                 }
 161                 set(NULL, centry);
 162
 163                 if (!root) {
 164                         last = root = centry;
 165                         root->parent = root;
 166                 } else if (last->type == F_DIR && !(last->flags & F_DONE)) {
 167                         centry->parent = last;
 168                         last = last->child = centry;
 169                 } else {
 170                         centry->parent = last->parent;
 171                         centry->prev = last;
 172                         last = last->next = centry;
 173                 }
 174         }
 175         return (root);
 176 }
 177
 178 static void
 179 set(char *t, NODE *ip)
 180 {
 181         int error = 0;
 182         int type;
 183         char *kw, *val = NULL;
 184         struct group *gr;
 185         struct passwd *pw;
 186         mode_t *m;
 187         int value;
 188         char *ep;
 189         char *l;
 190
 191         for (; (kw = strtok(t, "= \t\n")); t = NULL) {
 192                 ip->flags |= type = parsekey(kw, &value);
 193                 if ((value == 0) || (val = strtok(NULL, " \t\n")) == NULL) {
 194                         RECORD_FAILURE(27, EINVAL);
 195                         errx(1, "line %d: missing value", lineno);
 196                 }
 197                 switch(type) {
 198                         case F_CKSUM:
 199                                 ip->cksum = strtoul(val, &ep, 10);
 200                                 if (*ep) {
 201                                         RECORD_FAILURE(28, EINVAL);
 202                                         errx(1, "line %d: invalid checksum %s",
 203                                              lineno, val);
 204                                 }
 205                                 break;
 206                         case F_MD5:
 207                                 ip->md5digest = strdup(val);
 208                                 if (!ip->md5digest) {
 209                                         RECORD_FAILURE(29, ENOMEM);
 210                                         errx(1, "strdup");
 211                                 }
 212                                 break;
 213                         case F_SHA1:
 214                                 ip->sha1digest = strdup(val);
 215                                 if (!ip->sha1digest) {
 216                                         RECORD_FAILURE(30, ENOMEM);
 217                                         errx(1, "strdup");
 218                                 }
 219                                 break;
 220                         case F_SHA256:
 221                                 ip->sha256digest = strdup(val);
 222                                 if (!ip->sha256digest) {
 223                                         RECORD_FAILURE(31, ENOMEM);
 224                                         errx(1, "strdup");
 225                                 }
 226                                 break;
 227                         case F_RMD160:
 228                                 ip->rmd160digest = strdup(val);
 229                                 if (!ip->rmd160digest) {
 230                                         RECORD_FAILURE(32, ENOMEM);
 231                                         errx(1, "strdup");
 232                                 }
 233                                 break;
 234                         case F_FLAGS:
 235                                 if (strcmp("none", val) == 0) {
 236                                         ip->st_flags = 0;
 237                                 } else if (strtofflags(&val, &ip->st_flags, NULL) != 0) {
 238                                         RECORD_FAILURE(33, EINVAL);
 239                                         errx(1, "line %d: invalid flag %s",lineno, val);
 240                                 }
 241                                 break;
 242                         case F_GID:
 243                                 ip->st_gid = (gid_t)strtoul(val, &ep, 10);
 244                                 if (*ep) {
 245                                         RECORD_FAILURE(34, EINVAL);
 246                                         errx(1, "line %d: invalid gid %s", lineno, val);
 247                                 }
 248                                 break;
 249                         case F_GNAME:
 250                                 if ((gr = getgrnam(val)) == NULL) {
 251                                         RECORD_FAILURE(35, EINVAL);
 252                                         errx(1, "line %d: unknown group %s", lineno, val);
 253                                 }
 254                                 ip->st_gid = gr->gr_gid;
 255                                 break;
 256                         case F_IGN:
 257                                 /* just set flag bit */
 258                                 break;
 259                         case F_MODE:
 260                                 if ((m = setmode(val)) == NULL) {
 261                                         RECORD_FAILURE(36, EINVAL);
 262                                         errx(1, "line %d: invalid file mode %s",
 263                                              lineno, val);
 264                                 }
 265                                 ip->st_mode = getmode(m, 0);
 266                                 free(m);
 267                                 break;
 268                         case F_NLINK:
 269                                 ip->st_nlink = strtoul(val, &ep, 10);
 270                                 if (*ep) {
 271                                         RECORD_FAILURE(37, EINVAL);
 272                                         errx(1, "line %d: invalid link count %s",
 273                                              lineno,  val);
 274                                 }
 275                                 break;
 276                         case F_SIZE:
 277                                 ip->st_size = strtoq(val, &ep, 10);
 278                                 if (*ep) {
 279                                         RECORD_FAILURE(38, EINVAL);
 280                                         errx(1, "line %d: invalid size %s",
 281                                              lineno, val);
 282                                 }
 283                                 break;
 284                         case F_SLINK:
 285                                 ip->slink = malloc(strlen(val) + 1);
 286                                 if (ip->slink == NULL) {
 287                                         RECORD_FAILURE(39, ENOMEM);
 288                                         errx(1, "malloc");
 289                                 }
 290                                 if (strunvis(ip->slink, val) == -1) {
 291                                         RECORD_FAILURE(40, EILSEQ);
 292                                         errx(1, "symlink %s is ill-encoded", val);
 293                                 }
 294                                 break;
 295                         case F_TIME:
 296                                 ip->st_mtimespec.tv_sec = strtoul(val, &ep, 10);
 297                                 if (*ep != '.') {
 298                                         RECORD_FAILURE(41, EINVAL);
 299                                         errx(1, "line %d: invalid time %s",
 300                                              lineno, val);
 301                                 }
 302                                 val = ep + 1;
 303                                 ip->st_mtimespec.tv_nsec = strtoul(val, &ep, 10);
 304                                 if (*ep) {
 305                                         RECORD_FAILURE(42, EINVAL);
 306                                         errx(1, "line %d: invalid time %s",
 307                                              lineno, val);
 308                                 }
 309                                 break;
 310                         case F_TYPE:
 311                                 switch(*val) {
 312                                         case 'b':
 313                                                 if (!strcmp(val, "block"))
 314                                                         ip->type = F_BLOCK;
 315                                                 break;
 316                                         case 'c':
 317                                                 if (!strcmp(val, "char"))
 318                                                         ip->type = F_CHAR;
 319                                                 break;
 320                                         case 'd':
 321                                                 if (!strcmp(val, "dir"))
 322                                                         ip->type = F_DIR;
 323                                                 break;
 324                                         case 'f':
 325                                                 if (!strcmp(val, "file"))
 326                                                         ip->type = F_FILE;
 327                                                 if (!strcmp(val, "fifo"))
 328                                                         ip->type = F_FIFO;
 329                                                 break;
 330                                         case 'l':
 331                                                 if (!strcmp(val, "link"))
 332                                                         ip->type = F_LINK;
 333                                                 break;
 334                                         case 's':
 335                                                 if (!strcmp(val, "socket"))
 336                                                         ip->type = F_SOCK;
 337                                                 break;
 338                                         default:
 339                                                 RECORD_FAILURE(43, EINVAL);
 340                                                 errx(1, "line %d: unknown file type %s",
 341                                                      lineno, val);
 342                                 }
 343                                 break;
 344                         case F_UID:
 345                                 ip->st_uid = (uid_t)strtoul(val, &ep, 10);
 346                                 if (*ep) {
 347                                         RECORD_FAILURE(44, EINVAL);
 348                                         errx(1, "line %d: invalid uid %s", lineno, val);
 349                                 }
 350                                 break;
 351                         case F_UNAME:
 352                                 if ((pw = getpwnam(val)) == NULL) {
 353                                         RECORD_FAILURE(45, EINVAL);
 354                                         errx(1, "line %d: unknown user %s", lineno, val);
 355                                 }
 356                                 ip->st_uid = pw->pw_uid;
 357                                 break;
 358                         case F_BTIME:
 359                                 ip->st_birthtimespec.tv_sec = strtoul(val, &ep, 10);
 360                                 if (*ep != '.') {
 361                                         RECORD_FAILURE(46, EINVAL);
 362                                         errx(1, "line %d: invalid time %s",
 363                                              lineno, val);
 364                                 }
 365                                 val = ep + 1;
 366                                 ip->st_birthtimespec.tv_nsec = strtoul(val, &ep, 10);
 367                                 if (*ep) {
 368                                         RECORD_FAILURE(47, EINVAL);
 369                                         errx(1, "line %d: invalid time %s",
 370                                              lineno, val);
 371                                 }
 372                                 break;
 373                         case F_ATIME:
 374                                 ip->st_atimespec.tv_sec = strtoul(val, &ep, 10);
 375                                 if (*ep != '.') {
 376                                         RECORD_FAILURE(48, EINVAL);
 377                                         errx(1, "line %d: invalid time %s",
 378                                              lineno, val);
 379                                 }
 380                                 val = ep + 1;
 381                                 ip->st_atimespec.tv_nsec = strtoul(val, &ep, 10);
 382                                 if (*ep) {
 383                                         RECORD_FAILURE(49, EINVAL);
 384                                         errx(1, "line %d: invalid time %s",
 385                                              lineno, val);
 386                                 }
 387                                 break;
 388                         case F_CTIME:
 389                                 ip->st_ctimespec.tv_sec = strtoul(val, &ep, 10);
 390                                 if (*ep != '.') {
 391                                         RECORD_FAILURE(50, EINVAL);
 392                                         errx(1, "line %d: invalid time %s",
 393                                              lineno, val);
 394                                 }
 395                                 val = ep + 1;
 396                                 ip->st_ctimespec.tv_nsec = strtoul(val, &ep, 10);
 397                                 if (*ep) {
 398                                         RECORD_FAILURE(51, EINVAL);
 399                                         errx(1, "line %d: invalid time %s",
 400                                              lineno, val);
 401                                 }
 402                                 break;
 403                         case F_PTIME:
 404                                 ip->st_ptimespec.tv_sec = strtoul(val, &ep, 10);
 405                                 if (*ep != '.') {
 406                                         RECORD_FAILURE(52, EINVAL);
 407                                         errx(1, "line %d: invalid time %s",
 408                                              lineno, val);
 409                                 }
 410                                 val = ep + 1;
 411                                 ip->st_ptimespec.tv_nsec = strtoul(val, &ep, 10);
 412                                 if (*ep) {
 413                                         RECORD_FAILURE(53, EINVAL);
 414                                         errx(1, "line %d: invalid time %s",
 415                                              lineno, val);
 416                                 }
 417                                 break;
 418                         case F_XATTRS:
 419                                 /*
 420                                  * Note this is nested inside an strtok loop,
 421                                  * strtok_r must be used to preserve the strtok context
 422                                  * of the loop.
 423                                  */
 424                                 ep = strtok_r(val,".", &l);
 425                                 ip->xattrsdigest = strdup(ep);
 426                                 if (!ip->xattrsdigest) {
 427                                         error = errno;
 428                                         RECORD_FAILURE(54, error);
 429                                         errc(1, error, "strdup");
 430                                 }
 431                                 val = strtok_r(NULL,".", &l);
 432                                 if (val) {
 433                                         ip->xdstream_priv_id = strtoull(val, &ep, 10);
 434                                         if (*ep) {
 435                                                 RECORD_FAILURE(55, EINVAL);
 436                                                 errx(1, "line %d: invalid private id %s",
 437                                                      lineno, val);
 438                                         }
 439                                 } else {
 440                                         ip->xdstream_priv_id = 0;
 441                                 }
 442                                 break;
 443                         case F_INODE:
 444                                 ip->st_ino = (ino_t)strtoull(val, &ep, 10);
 445                                 if (*ep) {
 446                                         RECORD_FAILURE(56, EINVAL);
 447                                         errx(1, "line %d: invalid inode %s",
 448                                              lineno, val);
 449                                 }
 450                                 break;
 451                         case F_ACL:
 452                                 ip->acldigest = strdup(val);
 453                                 if (!ip->acldigest) {
 454                                         error = errno;
 455                                         RECORD_FAILURE(57, error);
 456                                         errc(1, error, "strdup");
 457                                 }
 458                                 break;
 459                         case F_SIBLINGID:
 460                                 ip->sibling_id = (quad_t)strtoull(val, &ep, 10);
 461                                 if (*ep) {
 462                                         RECORD_FAILURE(58, EINVAL);
 463                                         errx(1, "line %d: invalid sibling id %s", lineno, val);
 464                                 }
 465                 }
 466         }
 467 }
 468
 469 static void
 470 unset(char *t, NODE *ip)
 471 {
 472         char *p;
 473
 474         while ((p = strtok(t, "\n\t ")))
 475                 ip->flags &= ~parsekey(p, NULL);
 476 }