usr.sbin/pkg_install/lib/plist.c

   1 /*
   2  * FreeBSD install - a package for the installation and maintainance
   3  * of non-core utilities.
   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  *
  14  * Jordan K. Hubbard
  15  * 18 July 1993
  16  *
  17  * General packing list routines.
  18  *
  19  */
  20
  21 #include <sys/cdefs.h>
  22 __FBSDID("$FreeBSD$");
  23
  24 #include "lib.h"
  25 #include <err.h>
  26 #include <md5.h>
  27
  28 /* Add an item to a packing list */
  29 void
  30 add_plist(Package *p, plist_t type, const char *arg)
  31 {
  32     PackingList tmp;
  33
  34     tmp = new_plist_entry();
  35     tmp->name = copy_string(arg);
  36     tmp->type = type;
  37
  38     if (!p->head)
  39         p->head = p->tail = tmp;
  40     else {
  41         tmp->prev = p->tail;
  42         p->tail->next = tmp;
  43         p->tail = tmp;
  44     }
  45     switch (type) {
  46     case PLIST_NAME:
  47         p->name = tmp->name;
  48         break;
  49
  50     case PLIST_ORIGIN:
  51         p->origin = tmp->name;
  52         break;
  53
  54     default:
  55         break;
  56     }
  57 }
  58
  59 void
  60 add_plist_top(Package *p, plist_t type, const char *arg)
  61 {
  62     PackingList tmp;
  63
  64     tmp = new_plist_entry();
  65     tmp->name = copy_string(arg);
  66     tmp->type = type;
  67
  68     if (!p->head)
  69         p->head = p->tail = tmp;
  70     else {
  71         tmp->next = p->head;
  72         p->head->prev = tmp;
  73         p->head = tmp;
  74     }
  75 }
  76
  77 /* Return the last (most recent) entry in a packing list */
  78 PackingList
  79 last_plist(Package *p)
  80 {
  81     return p->tail;
  82 }
  83
  84 /* Mark all items in a packing list to prevent iteration over them */
  85 void
  86 mark_plist(Package *pkg)
  87 {
  88     PackingList p = pkg->head;
  89
  90     while (p) {
  91         p->marked = TRUE;
  92         p = p->next;
  93     }
  94 }
  95
  96 /* Find a given item in a packing list and, if so, return it (else NULL) */
  97 PackingList
  98 find_plist(Package *pkg, plist_t type)
  99 {
 100     PackingList p = pkg->head;
 101
 102     while (p) {
 103         if (p->type == type)
 104             return p;
 105         p = p->next;
 106     }
 107     return NULL;
 108 }
 109
 110 /* Look for a specific boolean option argument in the list */
 111 char *
 112 find_plist_option(Package *pkg, const char *name)
 113 {
 114     PackingList p = pkg->head;
 115
 116     while (p) {
 117         if (p->type == PLIST_OPTION && !strcmp(p->name, name))
 118             return p->name;
 119         p = p->next;
 120     }
 121     return NULL;
 122 }
 123
 124 /*
 125  * Delete plist item 'type' in the list (if 'name' is non-null, match it
 126  * too.)  If 'all' is set, delete all items, not just the first occurance.
 127  */
 128 void
 129 delete_plist(Package *pkg, Boolean all, plist_t type, const char *name)
 130 {
 131     PackingList p = pkg->head;
 132
 133     while (p) {
 134         PackingList pnext = p->next;
 135
 136         if (p->type == type && (!name || !strcmp(name, p->name))) {
 137             free(p->name);
 138             if (p->prev)
 139                 p->prev->next = pnext;
 140             else
 141                 pkg->head = pnext;
 142             if (pnext)
 143                 pnext->prev = p->prev;
 144             else
 145                 pkg->tail = p->prev;
 146             free(p);
 147             if (!all)
 148                 return;
 149             p = pnext;
 150         }
 151         else
 152             p = p->next;
 153     }
 154 }
 155
 156 /* Allocate a new packing list entry */
 157 PackingList
 158 new_plist_entry(void)
 159 {
 160     PackingList ret;
 161
 162     ret = (PackingList)malloc(sizeof(struct _plist));
 163     bzero(ret, sizeof(struct _plist));
 164     return ret;
 165 }
 166
 167 /* Free an entire packing list */
 168 void
 169 free_plist(Package *pkg)
 170 {
 171     PackingList p = pkg->head;
 172
 173     while (p) {
 174         PackingList p1 = p->next;
 175
 176         free(p->name);
 177         free(p);
 178         p = p1;
 179     }
 180     pkg->head = pkg->tail = NULL;
 181 }
 182
 183 /*
 184  * For an ascii string denoting a plist command, return its code and
 185  * optionally its argument(s)
 186  */
 187 int
 188 plist_cmd(const char *s, char **arg)
 189 {
 190     char cmd[FILENAME_MAX + 20];        /* 20 == fudge for max cmd len */
 191     char *cp;
 192     const char *sp;
 193
 194     strcpy(cmd, s);
 195     str_lowercase(cmd);
 196     cp = cmd;
 197     sp = s;
 198     while (*cp) {
 199         if (isspace(*cp)) {
 200             *cp = '\0';
 201             while (isspace(*sp)) /* Never sure if macro, increment later */
 202                 ++sp;
 203             break;
 204         }
 205         ++cp, ++sp;
 206     }
 207     if (arg)
 208         *arg = (char *)sp;
 209     if (!strcmp(cmd, "cwd"))
 210         return PLIST_CWD;
 211     else if (!strcmp(cmd, "srcdir"))
 212         return PLIST_SRC;
 213     else if (!strcmp(cmd, "cd"))
 214         return PLIST_CWD;
 215     else if (!strcmp(cmd, "exec"))
 216         return PLIST_CMD;
 217     else if (!strcmp(cmd, "unexec"))
 218         return PLIST_UNEXEC;
 219     else if (!strcmp(cmd, "mode"))
 220         return PLIST_CHMOD;
 221     else if (!strcmp(cmd, "owner"))
 222         return PLIST_CHOWN;
 223     else if (!strcmp(cmd, "group"))
 224         return PLIST_CHGRP;
 225     else if (!strcmp(cmd, "noinst"))
 226         return PLIST_NOINST;
 227     else if (!strcmp(cmd, "comment")) {
 228         if (!strncmp(*arg, "ORIGIN:", 7)) {
 229             *arg += 7;
 230             return PLIST_ORIGIN;
 231         } else if (!strncmp(*arg, "DEPORIGIN:", 10)) {
 232             *arg += 10;
 233             return PLIST_DEPORIGIN;
 234         }
 235         return PLIST_COMMENT;
 236     } else if (!strcmp(cmd, "ignore"))
 237         return PLIST_IGNORE;
 238     else if (!strcmp(cmd, "ignore_inst"))
 239         return PLIST_IGNORE_INST;
 240     else if (!strcmp(cmd, "name"))
 241         return PLIST_NAME;
 242     else if (!strcmp(cmd, "display"))
 243         return PLIST_DISPLAY;
 244     else if (!strcmp(cmd, "pkgdep"))
 245         return PLIST_PKGDEP;
 246     else if (!strcmp(cmd, "conflicts"))
 247         return PLIST_CONFLICTS;
 248     else if (!strcmp(cmd, "mtree"))
 249         return PLIST_MTREE;
 250     else if (!strcmp(cmd, "dirrm"))
 251         return PLIST_DIR_RM;
 252     else if (!strcmp(cmd, "option"))
 253         return PLIST_OPTION;
 254     else
 255         return FAIL;
 256 }
 257
 258 /* Read a packing list from a file */
 259 void
 260 read_plist(Package *pkg, FILE *fp)
 261 {
 262     char *cp, pline[FILENAME_MAX];
 263     int cmd, major, minor;
 264
 265     pkg->fmtver_maj = 1;
 266     pkg->fmtver_mnr = 0;
 267     pkg->origin = NULL;
 268     while (fgets(pline, FILENAME_MAX, fp)) {
 269         int len = strlen(pline);
 270
 271         while (len && isspace(pline[len - 1]))
 272             pline[--len] = '\0';
 273         if (!len)
 274             continue;
 275         cp = pline;
 276         if (pline[0] != CMD_CHAR) {
 277             cmd = PLIST_FILE;
 278             goto bottom;
 279         }
 280         cmd = plist_cmd(pline + 1, &cp);
 281         if (cmd == FAIL) {
 282             warnx("%s: unknown command '%s' (package tools out of date?)",
 283                 __func__, pline);
 284             goto bottom;
 285         }
 286         if (*cp == '\0') {
 287             cp = NULL;
 288             goto bottom;
 289         }
 290         if (cmd == PLIST_COMMENT && sscanf(cp, "PKG_FORMAT_REVISION:%d.%d\n",
 291                                            &major, &minor) == 2) {
 292             pkg->fmtver_maj = major;
 293             pkg->fmtver_mnr = minor;
 294             if (verscmp(pkg, PLIST_FMT_VER_MAJOR, PLIST_FMT_VER_MINOR) <= 0)
 295                 goto bottom;
 296
 297             warnx("plist format revision (%d.%d) is higher than supported"
 298                   "(%d.%d)", pkg->fmtver_maj, pkg->fmtver_mnr,
 299                   PLIST_FMT_VER_MAJOR, PLIST_FMT_VER_MINOR);
 300             if (pkg->fmtver_maj > PLIST_FMT_VER_MAJOR) {
 301                 cleanup(0);
 302                 exit(2);
 303             }
 304         }
 305 bottom:
 306         add_plist(pkg, cmd, cp);
 307     }
 308 }
 309
 310 /* Write a packing list to a file, converting commands to ascii equivs */
 311 void
 312 write_plist(Package *pkg, FILE *fp)
 313 {
 314     PackingList plist = pkg->head;
 315
 316     while (plist) {
 317         switch(plist->type) {
 318         case PLIST_FILE:
 319             fprintf(fp, "%s\n", plist->name);
 320             break;
 321
 322         case PLIST_CWD:
 323             fprintf(fp, "%ccwd %s\n", CMD_CHAR, (plist->name == NULL) ? "" : plist->name);
 324             break;
 325
 326         case PLIST_SRC:
 327             fprintf(fp, "%csrcdir %s\n", CMD_CHAR, plist->name);
 328             break;
 329
 330         case PLIST_CMD:
 331             fprintf(fp, "%cexec %s\n", CMD_CHAR, plist->name);
 332             break;
 333
 334         case PLIST_UNEXEC:
 335             fprintf(fp, "%cunexec %s\n", CMD_CHAR, plist->name);
 336             break;
 337
 338         case PLIST_CHMOD:
 339             fprintf(fp, "%cmode %s\n", CMD_CHAR, plist->name ? plist->name : "");
 340             break;
 341
 342         case PLIST_CHOWN:
 343             fprintf(fp, "%cowner %s\n", CMD_CHAR, plist->name ? plist->name : "");
 344             break;
 345
 346         case PLIST_CHGRP:
 347             fprintf(fp, "%cgroup %s\n", CMD_CHAR, plist->name ? plist->name : "");
 348             break;
 349
 350         case PLIST_COMMENT:
 351             fprintf(fp, "%ccomment %s\n", CMD_CHAR, plist->name);
 352             break;
 353
 354         case PLIST_NOINST:
 355             fprintf(fp, "%cnoinst %s\n", CMD_CHAR, plist->name);
 356             break;
 357
 358         case PLIST_IGNORE:
 359         case PLIST_IGNORE_INST:         /* a one-time non-ignored file */
 360             fprintf(fp, "%cignore\n", CMD_CHAR);
 361             break;
 362
 363         case PLIST_NAME:
 364             fprintf(fp, "%cname %s\n", CMD_CHAR, plist->name);
 365             break;
 366
 367         case PLIST_DISPLAY:
 368             fprintf(fp, "%cdisplay %s\n", CMD_CHAR, plist->name);
 369             break;
 370
 371         case PLIST_PKGDEP:
 372             fprintf(fp, "%cpkgdep %s\n", CMD_CHAR, plist->name);
 373             break;
 374
 375         case PLIST_CONFLICTS:
 376             fprintf(fp, "%cconflicts %s\n", CMD_CHAR, plist->name);
 377             break;
 378
 379         case PLIST_MTREE:
 380             fprintf(fp, "%cmtree %s\n", CMD_CHAR, plist->name);
 381             break;
 382
 383         case PLIST_DIR_RM:
 384             fprintf(fp, "%cdirrm %s\n", CMD_CHAR, plist->name);
 385             break;
 386
 387         case PLIST_OPTION:
 388             fprintf(fp, "%coption %s\n", CMD_CHAR, plist->name);
 389             break;
 390
 391         case PLIST_ORIGIN:
 392             fprintf(fp, "%ccomment ORIGIN:%s\n", CMD_CHAR, plist->name);
 393             break;
 394
 395         case PLIST_DEPORIGIN:
 396             fprintf(fp, "%ccomment DEPORIGIN:%s\n", CMD_CHAR, plist->name);
 397             break;
 398
 399         default:
 400             cleanup(0);
 401             errx(2, "%s: unknown command type %d (%s)", __func__,
 402                 plist->type, plist->name);
 403             break;
 404         }
 405         plist = plist->next;
 406     }
 407 }
 408
 409 /*
 410  * Delete the results of a package installation.
 411  *
 412  * This is here rather than in the pkg_delete code because pkg_add needs to
 413  * run it too in cases of failure.
 414  */
 415 int
 416 delete_package(Boolean ign_err, Boolean nukedirs, Package *pkg)
 417 {
 418     PackingList p;
 419     const char *Where = ".", *last_file = "";
 420     Boolean fail = SUCCESS;
 421     Boolean preserve;
 422     char tmp[FILENAME_MAX], *name = NULL;
 423     char *prefix = NULL;
 424
 425     preserve = find_plist_option(pkg, "preserve") ? TRUE : FALSE;
 426     for (p = pkg->head; p; p = p->next) {
 427         switch (p->type)  {
 428         case PLIST_NAME:
 429             name = p->name;
 430             break;
 431
 432         case PLIST_IGNORE:
 433             p = p->next;
 434             break;
 435
 436         case PLIST_CWD:
 437             if (!prefix)
 438                 prefix = p->name;
 439             Where = (p->name == NULL) ? prefix : p->name;
 440             if (Verbose)
 441                 printf("Change working directory to %s\n", Where);
 442             break;
 443
 444         case PLIST_UNEXEC:
 445             format_cmd(tmp, FILENAME_MAX, p->name, Where, last_file);
 446             if (Verbose)
 447                 printf("Execute '%s'\n", tmp);
 448             if (!Fake && system(tmp)) {
 449                 warnx("unexec command for '%s' failed", tmp);
 450                 fail = FAIL;
 451             }
 452             break;
 453
 454         case PLIST_FILE:
 455             last_file = p->name;
 456             sprintf(tmp, "%s/%s", Where, p->name);
 457             if (isdir(tmp) && fexists(tmp) && !issymlink(tmp)) {
 458                 warnx("cannot delete specified file '%s' - it is a directory!\n"
 459            "this packing list is incorrect - ignoring delete request", tmp);
 460             }
 461             else {
 462                 if (p->next && p->next->type == PLIST_COMMENT && !strncmp(p->next->name, "MD5:", 4)) {
 463                     char *cp = NULL, buf[33];
 464
 465                     /*
 466                      * For packing lists whose version is 1.1 or greater, the md5
 467                      * hash for a symlink is calculated on the string returned
 468                      * by readlink().
 469                      */
 470                     if (issymlink(tmp) && verscmp(pkg, 1, 0) > 0) {
 471                         int len;
 472                         char linkbuf[FILENAME_MAX];
 473
 474                         if ((len = readlink(tmp, linkbuf, FILENAME_MAX)) > 0)
 475                              cp = MD5Data((unsigned char *)linkbuf, len, buf);
 476                     } else if (isfile(tmp) || verscmp(pkg, 1, 1) < 0)
 477                         cp = MD5File(tmp, buf);
 478
 479                     if (cp != NULL) {
 480                         /* Mismatch? */
 481                         if (strcmp(cp, p->next->name + 4)) {
 482                             warnx("'%s' fails original MD5 checksum - %s",
 483                                   tmp, Force ? "deleted anyway." : "not deleted.");
 484                             if (!Force) {
 485                                 fail = FAIL;
 486                                 continue;
 487                             }
 488                         }
 489                     }
 490                 }
 491                 if (Verbose)
 492                     printf("Delete file %s\n", tmp);
 493                 if (!Fake) {
 494                     if (delete_hierarchy(tmp, ign_err, nukedirs))
 495                         fail = FAIL;
 496                     if (preserve && name) {
 497                         char tmp2[FILENAME_MAX];
 498
 499                         if (make_preserve_name(tmp2, FILENAME_MAX, name, tmp)) {
 500                             if (fexists(tmp2)) {
 501                                 if (rename(tmp2, tmp))
 502                                    warn("preserve: unable to restore %s as %s",
 503                                         tmp2, tmp);
 504                             }
 505                         }
 506                     }
 507                 }
 508             }
 509             break;
 510
 511         case PLIST_DIR_RM:
 512             sprintf(tmp, "%s/%s", Where, p->name);
 513             if (!isdir(tmp) && fexists(tmp)) {
 514                 warnx("cannot delete specified directory '%s' - it is a file!\n"
 515         "this packing list is incorrect - ignoring delete request", tmp);
 516             }
 517             else {
 518                 if (Verbose)
 519                     printf("Delete directory %s\n", tmp);
 520                 if (!Fake && delete_hierarchy(tmp, ign_err, FALSE)) {
 521                     warnx("unable to completely remove directory '%s'", tmp);
 522                     fail = FAIL;
 523                 }
 524             }
 525             last_file = p->name;
 526             break;
 527
 528         default:
 529             break;
 530         }
 531     }
 532     return fail;
 533 }
 534
 535 #ifdef DEBUG
 536 #define RMDIR(dir) vsystem("%s %s", RMDIR_CMD, dir)
 537 #define REMOVE(dir,ie) vsystem("%s %s%s", REMOVE_CMD, (ie ? "-f " : ""), dir)
 538 #else
 539 #define RMDIR rmdir
 540 #define REMOVE(file,ie) (remove(file) && !(ie))
 541 #endif
 542
 543 /* Selectively delete a hierarchy */
 544 int
 545 delete_hierarchy(const char *dir, Boolean ign_err, Boolean nukedirs)
 546 {
 547     char *cp1, *cp2;
 548
 549     cp1 = cp2 = strdup(dir);
 550     if (!fexists(dir)) {
 551         if (!ign_err)
 552             warnx("%s '%s' doesn't exist",
 553                 isdir(dir) ? "directory" : "file", dir);
 554         return !ign_err;
 555     }
 556     else if (nukedirs) {
 557         if (vsystem("%s -r%s %s", REMOVE_CMD, (ign_err ? "f" : ""), dir))
 558             return 1;
 559     }
 560     else if (isdir(dir) && !issymlink(dir)) {
 561         if (RMDIR(dir) && !ign_err)
 562             return 1;
 563     }
 564     else {
 565         if (REMOVE(dir, ign_err))
 566             return 1;
 567     }
 568
 569     if (!nukedirs)
 570         return 0;
 571     while (cp2) {
 572         if ((cp2 = strrchr(cp1, '/')) != NULL)
 573             *cp2 = '\0';
 574         if (!isemptydir(dir))
 575             return 0;
 576         if (RMDIR(dir) && !ign_err) {
 577             if (!fexists(dir))
 578                 warnx("directory '%s' doesn't exist", dir);
 579             else
 580                 return 1;
 581         }
 582         /* back up the pathname one component */
 583         if (cp2) {
 584             cp1 = strdup(dir);
 585         }
 586     }
 587     return 0;
 588 }