usr.sbin/pkg_install/delete/perform.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  * This is the main body of the delete module.
  18  *
  19  */
  20
  21 #include <sys/cdefs.h>
  22 __FBSDID("$FreeBSD$");
  23
  24 #include <err.h>
  25 #include "lib.h"
  26 #include "delete.h"
  27
  28 static int pkg_do(char *);
  29 static void sanity_check(char *);
  30 static void undepend(char *, char *);
  31 static char LogDir[FILENAME_MAX];
  32
  33
  34 int
  35 pkg_perform(char **pkgs)
  36 {
  37     char **matched, **rb, **rbtmp;
  38     int errcode, i, j;
  39     int err_cnt = 0;
  40     struct reqr_by_entry *rb_entry;
  41     struct reqr_by_head *rb_list;
  42
  43     if (MatchType != MATCH_EXACT) {
  44         matched = matchinstalled(MatchType, pkgs, &errcode);
  45         if (errcode != 0)
  46             return 1;
  47             /* Not reached */
  48
  49         /*
  50          * Copy matched[] into pkgs[], because we'll need to use
  51          * matchinstalled() later on.
  52          */
  53         if (matched != NULL) {
  54             pkgs = NULL;
  55             for (i = 0; matched[i] != NULL; i++) {
  56                 pkgs = realloc(pkgs, sizeof(*pkgs) * (i + 2));
  57                 pkgs[i] = strdup(matched[i]);
  58             }
  59             pkgs[i] = NULL;
  60         }
  61         else switch (MatchType) {
  62             case MATCH_GLOB:
  63                 break;
  64             case MATCH_ALL:
  65                 warnx("no packages installed");
  66                 return 0;
  67             case MATCH_EREGEX:
  68             case MATCH_REGEX:
  69                 warnx("no packages match pattern(s)");
  70                 return 1;
  71             default:
  72                 break;
  73         }
  74     }
  75
  76     err_cnt += sortdeps(pkgs);
  77     for (i = 0; pkgs[i]; i++) {
  78         if (Recursive == TRUE) {
  79             errcode = requiredby(pkgs[i], &rb_list, FALSE, TRUE);
  80             if (errcode < 0) {
  81                 err_cnt++;
  82             } else if (errcode > 0) {
  83                 /*
  84                  * Copy values from the rb_list queue into argv-like NULL
  85                  * terminated list because requiredby() uses some static
  86                  * storage, while pkg_do() below will call this function,
  87                  * thus blowing our rb_list away.
  88                  */
  89                 rbtmp = rb = alloca((errcode + 1) * sizeof(*rb));
  90                 if (rb == NULL) {
  91                     warnx("%s(): alloca() failed", __func__);
  92                     err_cnt++;
  93                     continue;
  94                 }
  95                 STAILQ_FOREACH(rb_entry, rb_list, link) {
  96                     *rbtmp = alloca(strlen(rb_entry->pkgname) + 1);
  97                     if (*rbtmp == NULL) {
  98                         warnx("%s(): alloca() failed", __func__);
  99                         err_cnt++;
 100                         continue;
 101                     }
 102                     strcpy(*rbtmp, rb_entry->pkgname);
 103                     rbtmp++;
 104                 }
 105                 *rbtmp = NULL;
 106
 107                 err_cnt += sortdeps(rb);
 108                 for (j = 0; rb[j]; j++)
 109                     err_cnt += pkg_do(rb[j]);
 110             }
 111         }
 112         err_cnt += pkg_do(pkgs[i]);
 113     }
 114
 115     return err_cnt;
 116 }
 117
 118 static Package Plist;
 119
 120 /* This is seriously ugly code following.  Written very fast! */
 121 static int
 122 pkg_do(char *pkg)
 123 {
 124     FILE *cfile;
 125     char *deporigin, **deporigins = NULL, **depnames = NULL, ***depmatches, home[FILENAME_MAX];
 126     PackingList p;
 127     int i, len;
 128     int isinstalled;
 129     /* support for separate pre/post install scripts */
 130     int new_m = 0, dep_count = 0;
 131     const char *pre_script = DEINSTALL_FNAME;
 132     const char *post_script, *pre_arg, *post_arg;
 133     struct reqr_by_entry *rb_entry;
 134     struct reqr_by_head *rb_list;
 135
 136     if (!pkg || !(len = strlen(pkg)))
 137         return 1;
 138     if (pkg[len - 1] == '/')
 139         pkg[len - 1] = '\0';
 140
 141     /* Reset some state */
 142     if (Plist.head)
 143         free_plist(&Plist);
 144
 145     sprintf(LogDir, "%s/%s", LOG_DIR, pkg);
 146
 147     isinstalled = isinstalledpkg(pkg);
 148     if (isinstalled == 0) {
 149         warnx("no such package '%s' installed", pkg);
 150         return 1;
 151     } else if (isinstalled < 0) {
 152         warnx("the package info for package '%s' is corrupt%s",
 153               pkg, Force ? " (but I'll delete it anyway)" : " (use -f to force removal)");
 154         if (!Force)
 155             return 1;
 156         if (!Fake) {
 157             if (vsystem("%s -rf %s", REMOVE_CMD, LogDir)) {
 158                 warnx("couldn't remove log entry in %s, deinstall failed", LogDir);
 159             } else {
 160                 warnx("couldn't completely deinstall package '%s',\n"
 161                       "only the log entry in %s was removed", pkg, LogDir);
 162             }
 163         }
 164         return 0;
 165     }
 166
 167     if (!getcwd(home, FILENAME_MAX)) {
 168         cleanup(0);
 169         errx(2, "%s: unable to get current working directory!", __func__);
 170     }
 171
 172     if (chdir(LogDir) == FAIL) {
 173         warnx("unable to change directory to %s! deinstall failed", LogDir);
 174         return 1;
 175     }
 176
 177     if (Interactive == TRUE) {
 178         int first, ch;
 179
 180         (void)fprintf(stderr, "delete %s? ", pkg);
 181         (void)fflush(stderr);
 182         first = ch = getchar();
 183         while (ch != '\n' && ch != EOF)
 184             ch = getchar();
 185         if (first != 'y' && first != 'Y')
 186             return 0;
 187             /* Not reached */
 188     }
 189
 190     if (requiredby(pkg, &rb_list, FALSE, TRUE) < 0)
 191         return 1;
 192     if (!STAILQ_EMPTY(rb_list)) {
 193         warnx("package '%s' is required by these other packages\n"
 194               "and may not be deinstalled%s:",
 195               pkg, Force ? " (but I'll delete it anyway)" : "");
 196         STAILQ_FOREACH(rb_entry, rb_list, link)
 197             fprintf(stderr, "%s\n", rb_entry->pkgname);
 198         if (!Force)
 199             return 1;
 200     }
 201
 202     sanity_check(LogDir);
 203     cfile = fopen(CONTENTS_FNAME, "r");
 204
 205     if (!cfile) {
 206         warnx("unable to open '%s' file", CONTENTS_FNAME);
 207         return 1;
 208     }
 209
 210     /* If we have a prefix, add it now */
 211     if (Prefix)
 212         add_plist(&Plist, PLIST_CWD, Prefix);
 213     read_plist(&Plist, cfile);
 214     fclose(cfile);
 215     p = find_plist(&Plist, PLIST_CWD);
 216
 217     if (!p) {
 218         warnx("package '%s' doesn't have a prefix", pkg);
 219         return 1;
 220     }
 221
 222     setenv(PKG_PREFIX_VNAME, p->name, 1);
 223
 224     if (fexists(REQUIRE_FNAME)) {
 225         if (Verbose)
 226             printf("Executing 'require' script.\n");
 227         vsystem("/bin/chmod +x %s", REQUIRE_FNAME);     /* be sure */
 228         if (vsystem("./%s %s DEINSTALL", REQUIRE_FNAME, pkg)) {
 229             warnx("package %s fails requirements %s", pkg,
 230                    Force ? "" : "- not deleted");
 231             if (!Force)
 232                 return 1;
 233         }
 234     }
 235
 236     /*
 237      * Test whether to use the old method of passing tokens to deinstallation
 238      * scripts, and set appropriate variables..
 239      */
 240
 241     if (fexists(POST_DEINSTALL_FNAME)) {
 242         new_m = 1;
 243         post_script = POST_DEINSTALL_FNAME;
 244         pre_arg = post_arg = "";
 245     } else if (fexists(DEINSTALL_FNAME)) {
 246         post_script = DEINSTALL_FNAME;
 247         pre_arg = "DEINSTALL";
 248         post_arg = "POST-DEINSTALL";
 249     } else {
 250         post_script = pre_arg = post_arg = NULL;
 251     }
 252
 253     if (!NoDeInstall && pre_script != NULL && fexists(pre_script)) {
 254         if (Fake)
 255             printf("Would execute de-install script at this point.\n");
 256         else {
 257             vsystem("/bin/chmod +x %s", pre_script);    /* make sure */
 258             if (vsystem("./%s %s %s", pre_script, pkg, pre_arg)) {
 259                 warnx("deinstall script returned error status");
 260                 if (!Force)
 261                     return 1;
 262             }
 263         }
 264     }
 265
 266     for (p = Plist.head; p ; p = p->next) {
 267         if (p->type != PLIST_PKGDEP)
 268             continue;
 269         deporigin = (p->next != NULL && p->next->type == PLIST_DEPORIGIN) ? p->next->name :
 270                                                          NULL;
 271         if (Verbose) {
 272             printf("Trying to remove dependency on package '%s'", p->name);
 273             if (deporigin != NULL)
 274                 printf(" with '%s' origin", deporigin);
 275             printf(".\n");
 276         }
 277         if (!Fake) {
 278             if (deporigin) {
 279                 deporigins = realloc(deporigins, (dep_count + 2) * sizeof(*deporigins));
 280                 depnames = realloc(depnames, (dep_count + 1) * sizeof(*depnames));
 281                 deporigins[dep_count] = deporigin;
 282                 deporigins[dep_count + 1] = NULL;
 283                 depnames[dep_count] = p->name;
 284                 dep_count++;
 285             } else {
 286                 undepend(p->name, pkg);
 287             }
 288         }
 289     }
 290
 291     if (dep_count > 0) {
 292         /* Undepend all the dependencies at once */
 293         depmatches = matchallbyorigin((const char **)deporigins, NULL);
 294         free(deporigins);
 295         if (depmatches) {
 296             for (i = 0; i < dep_count; i++) {
 297                 if (depmatches[i]) {
 298                     char **tmp = depmatches[i];
 299                     int j;
 300                     for (j = 0; tmp[j] != NULL; j++)
 301                         undepend(tmp[j], pkg);
 302                 } else if (depnames[i]) {
 303                     undepend(depnames[i], pkg);
 304                 }
 305             }
 306         }
 307     }
 308
 309     if (chdir(home) == FAIL) {
 310         cleanup(0);
 311         errx(2, "%s: unable to return to working directory %s!", __func__,
 312             home);
 313     }
 314
 315     /*
 316      * Some packages aren't packed right, so we need to just ignore
 317      * delete_package()'s status.  Ugh! :-(
 318      */
 319     if (delete_package(FALSE, CleanDirs, &Plist) == FAIL)
 320         warnx(
 321         "couldn't entirely delete package (perhaps the packing list is\n"
 322         "incorrectly specified?)");
 323
 324     if (chdir(LogDir) == FAIL) {
 325         warnx("unable to change directory to %s! deinstall failed", LogDir);
 326         return 1;
 327     }
 328
 329     if (!NoDeInstall && post_script != NULL && fexists(post_script)) {
 330         if (Fake)
 331             printf("Would execute post-deinstall script at this point.\n");
 332         else {
 333             vsystem("/bin/chmod +x %s", post_script);   /* make sure */
 334             if (vsystem("./%s %s %s", post_script, pkg, post_arg)) {
 335                 warnx("post-deinstall script returned error status");
 336                 if (!Force)
 337                     return 1;
 338             }
 339         }
 340     }
 341
 342     if (chdir(home) == FAIL) {
 343         cleanup(0);
 344         errx(2, "%s: unable to return to working directory %s!", __func__,
 345             home);
 346     }
 347
 348     if (!Fake) {
 349         if (vsystem("%s -r%c %s", REMOVE_CMD, Force ? 'f' : ' ', LogDir)) {
 350             warnx("couldn't remove log entry in %s, deinstall failed", LogDir);
 351             if (!Force)
 352                 return 1;
 353         }
 354     }
 355     return 0;
 356 }
 357
 358 static void
 359 sanity_check(char *pkg)
 360 {
 361     if (!fexists(CONTENTS_FNAME)) {
 362         cleanup(0);
 363         errx(2, "%s: installed package %s has no %s file!", __func__,
 364             pkg, CONTENTS_FNAME);
 365     }
 366 }
 367
 368 void
 369 cleanup(int sig)
 370 {
 371     if (sig)
 372         exit(1);
 373 }
 374
 375 static void
 376 undepend(char *p, char *pkgname)
 377 {
 378     char fname[FILENAME_MAX], ftmp[FILENAME_MAX];
 379     FILE *fpwr;
 380     int s;
 381     struct reqr_by_entry *rb_entry;
 382     struct reqr_by_head *rb_list;
 383
 384
 385     if (requiredby(p, &rb_list, Verbose, FALSE) <= 0)
 386         return;
 387     snprintf(fname, sizeof(fname), "%s/%s/%s", LOG_DIR, p, REQUIRED_BY_FNAME);
 388     snprintf(ftmp, sizeof(ftmp), "%s.XXXXXX", fname);
 389     s = mkstemp(ftmp);
 390     if (s == -1) {
 391         warnx("couldn't open temp file '%s'", ftmp);
 392         return;
 393     }
 394     fpwr = fdopen(s, "w");
 395     if (fpwr == NULL) {
 396         close(s);
 397         warnx("couldn't fdopen temp file '%s'", ftmp);
 398         goto cleanexit;
 399     }
 400     STAILQ_FOREACH(rb_entry, rb_list, link)
 401         if (strcmp(rb_entry->pkgname, pkgname))         /* no match */
 402             fputs(rb_entry->pkgname, fpwr), putc('\n', fpwr);
 403     if (fchmod(s, 0644) == FAIL) {
 404         warnx("error changing permission of temp file '%s'", ftmp);
 405         fclose(fpwr);
 406         goto cleanexit;
 407     }
 408     if (fclose(fpwr) == EOF) {
 409         warnx("error closing temp file '%s'", ftmp);
 410         goto cleanexit;
 411     }
 412     if (rename(ftmp, fname) == -1)
 413         warnx("error renaming '%s' to '%s'", ftmp, fname);
 414 cleanexit:
 415     remove(ftmp);
 416     return;
 417 }