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  * $FreeBSD: src/usr.sbin/pkg_install/delete/perform.c,v 1.41 2004/06/29 19:06:41 eik Exp $
  20  * $DragonFly: src/usr.sbin/pkg_install/delete/perform.c,v 1.4 2004/12/18 23:48:04 swildner Exp $
  21  */
  22
  23 #include <err.h>
  24 #include "lib.h"
  25 #include "delete.h"
  26
  27 static int pkg_do(char *);
  28 static void sanity_check(char *);
  29 static void undepend(char *, char *);
  30 static char LogDir[FILENAME_MAX];
  31
  32
  33 int
  34 pkg_perform(char **pkgs)
  35 {
  36     char **matched, **rb, **rbtmp;
  37     int errcode, i, j;
  38     int err_cnt = 0;
  39     struct reqr_by_entry *rb_entry;
  40     struct reqr_by_head *rb_list;
  41
  42     if (MatchType != MATCH_EXACT) {
  43         matched = matchinstalled(MatchType, pkgs, &errcode);
  44         if (errcode != 0)
  45             return 1;
  46             /* Not reached */
  47
  48         /*
  49          * Copy matched[] into pkgs[], because we'll need to use
  50          * matchinstalled() later on.
  51          */
  52         if (matched != NULL) {
  53             pkgs = NULL;
  54             for (i = 0; matched[i] != NULL; i++) {
  55                 pkgs = realloc(pkgs, sizeof(*pkgs) * (i + 2));
  56                 pkgs[i] = strdup(matched[i]);
  57             }
  58             pkgs[i] = NULL;
  59         }
  60         else switch (MatchType) {
  61             case MATCH_GLOB:
  62                 break;
  63             case MATCH_ALL:
  64                 warnx("no packages installed");
  65                 return 0;
  66             case MATCH_EREGEX:
  67             case MATCH_REGEX:
  68                 warnx("no packages match pattern(s)");
  69                 return 1;
  70             default:
  71                 break;
  72         }
  73     }
  74
  75     err_cnt += sortdeps(pkgs);
  76     for (i = 0; pkgs[i]; i++) {
  77         if (Recursive == TRUE) {
  78             errcode = requiredby(pkgs[i], &rb_list, FALSE, TRUE);
  79             if (errcode < 0) {
  80                 err_cnt++;
  81             } else if (errcode > 0) {
  82                 /*
  83                  * Copy values from the rb_list queue into argv-like NULL
  84                  * terminated list because requiredby() uses some static
  85                  * storage, while pkg_do() below will call this function,
  86                  * thus blowing our rb_list away.
  87                  */
  88                 rbtmp = rb = alloca((errcode + 1) * sizeof(*rb));
  89                 if (rb == NULL) {
  90                     warnx("%s(): alloca() failed", __func__);
  91                     err_cnt++;
  92                     continue;
  93                 }
  94                 STAILQ_FOREACH(rb_entry, rb_list, link) {
  95                     *rbtmp = alloca(strlen(rb_entry->pkgname) + 1);
  96                     if (*rbtmp == NULL) {
  97                         warnx("%s(): alloca() failed", __func__);
  98                         err_cnt++;
  99                         continue;
 100                     }
 101                     strcpy(*rbtmp, rb_entry->pkgname);
 102                     rbtmp++;
 103                 }
 104                 *rbtmp = NULL;
 105
 106                 err_cnt += sortdeps(rb);
 107                 for (j = 0; rb[j]; j++)
 108                     err_cnt += pkg_do(rb[j]);
 109             }
 110         }
 111         err_cnt += pkg_do(pkgs[i]);
 112     }
 113
 114     return err_cnt;
 115 }
 116
 117 static Package Plist;
 118
 119 /* This is seriously ugly code following.  Written very fast! */
 120 static int
 121 pkg_do(char *pkg)
 122 {
 123     FILE *cfile;
 124     char *deporigin, **depnames, home[FILENAME_MAX];
 125     PackingList p;
 126     int i, len;
 127     int isinstalled;
 128     /* support for separate pre/post install scripts */
 129     int new_m = 0;
 130     const char *pre_script = DEINSTALL_FNAME;
 131     const char *post_script, *pre_arg, *post_arg;
 132     struct reqr_by_entry *rb_entry;
 133     struct reqr_by_head *rb_list;
 134
 135     if (!pkg || !(len = strlen(pkg)))
 136         return 1;
 137     if (pkg[len - 1] == '/')
 138         pkg[len - 1] = '\0';
 139
 140     /* Reset some state */
 141     if (Plist.head)
 142         free_plist(&Plist);
 143
 144     sprintf(LogDir, "%s/%s", LOG_DIR, pkg);
 145
 146     isinstalled = isinstalledpkg(pkg);
 147     if (isinstalled == 0) {
 148         warnx("no such package '%s' installed", pkg);
 149         return 1;
 150     } else if (isinstalled < 0) {
 151         warnx("the package info for package '%s' is corrupt%s",
 152               pkg, Force ? " (but I'll delete it anyway)" : " (use -f to force removal)");
 153         if (!Force)
 154             return 1;
 155         if (!Fake) {
 156             if (vsystem("%s -rf %s", REMOVE_CMD, LogDir)) {
 157                 warnx("couldn't remove log entry in %s, deinstall failed", LogDir);
 158             } else {
 159                 warnx("couldn't completely deinstall package '%s',\n"
 160                       "only the log entry in %s was removed", pkg, LogDir);
 161             }
 162         }
 163         return 0;
 164     }
 165
 166     if (!getcwd(home, FILENAME_MAX)) {
 167         cleanup(0);
 168         errx(2, "%s: unable to get current working directory!", __func__);
 169     }
 170
 171     if (chdir(LogDir) == FAIL) {
 172         warnx("unable to change directory to %s! deinstall failed", LogDir);
 173         return 1;
 174     }
 175
 176     if (Interactive == TRUE) {
 177         int first, ch;
 178
 179         fprintf(stderr, "delete %s? ", pkg);
 180         fflush(stderr);
 181         first = ch = getchar();
 182         while (ch != '\n' && ch != EOF)
 183             ch = getchar();
 184         if (first != 'y' && first != 'Y')
 185             return 0;
 186             /* Not reached */
 187     }
 188
 189     if (requiredby(pkg, &rb_list, FALSE, TRUE) < 0)
 190         return 1;
 191     if (!STAILQ_EMPTY(rb_list)) {
 192         warnx("package '%s' is required by these other packages\n"
 193               "and may not be deinstalled%s:",
 194               pkg, Force ? " (but I'll delete it anyway)" : "");
 195         STAILQ_FOREACH(rb_entry, rb_list, link)
 196             fprintf(stderr, "%s\n", rb_entry->pkgname);
 197         if (!Force)
 198             return 1;
 199     }
 200
 201     sanity_check(LogDir);
 202     cfile = fopen(CONTENTS_FNAME, "r");
 203
 204     if (!cfile) {
 205         warnx("unable to open '%s' file", CONTENTS_FNAME);
 206         return 1;
 207     }
 208
 209     /* If we have a prefix, add it now */
 210     if (Prefix)
 211         add_plist(&Plist, PLIST_CWD, Prefix);
 212     read_plist(&Plist, cfile);
 213     fclose(cfile);
 214     p = find_plist(&Plist, PLIST_CWD);
 215
 216     if (!p) {
 217         warnx("package '%s' doesn't have a prefix", pkg);
 218         return 1;
 219     }
 220
 221     setenv(PKG_PREFIX_VNAME, p->name, 1);
 222
 223     if (fexists(REQUIRE_FNAME)) {
 224         if (Verbose)
 225             printf("Executing 'require' script.\n");
 226         vsystem("/bin/chmod +x %s", REQUIRE_FNAME);     /* be sure */
 227         if (vsystem("./%s %s DEINSTALL", REQUIRE_FNAME, pkg)) {
 228             warnx("package %s fails requirements %s", pkg,
 229                    Force ? "" : "- not deleted");
 230             if (!Force)
 231                 return 1;
 232         }
 233     }
 234
 235     /*
 236      * Test whether to use the old method of passing tokens to deinstallation
 237      * scripts, and set appropriate variables..
 238      */
 239
 240     if (fexists(POST_DEINSTALL_FNAME)) {
 241         new_m = 1;
 242         post_script = POST_DEINSTALL_FNAME;
 243         pre_arg = post_arg = "";
 244     } else if (fexists(DEINSTALL_FNAME)) {
 245         post_script = DEINSTALL_FNAME;
 246         pre_arg = "DEINSTALL";
 247         post_arg = "POST-DEINSTALL";
 248     } else {
 249         post_script = pre_arg = post_arg = NULL;
 250     }
 251
 252     if (!NoDeInstall && pre_script != NULL && fexists(pre_script)) {
 253         if (Fake)
 254             printf("Would execute de-install script at this point.\n");
 255         else {
 256             vsystem("/bin/chmod +x %s", pre_script);    /* make sure */
 257             if (vsystem("./%s %s %s", pre_script, pkg, pre_arg)) {
 258                 warnx("deinstall script returned error status");
 259                 if (!Force)
 260                     return 1;
 261             }
 262         }
 263     }
 264
 265     for (p = Plist.head; p ; p = p->next) {
 266         if (p->type != PLIST_PKGDEP)
 267             continue;
 268         deporigin = (p->next->type == PLIST_DEPORIGIN) ? p->next->name :
 269                                                          NULL;
 270         if (Verbose) {
 271             printf("Trying to remove dependency on package '%s'", p->name);
 272             if (deporigin != NULL)
 273                 printf(" with '%s' origin", deporigin);
 274             printf(".\n");
 275         }
 276         if (!Fake) {
 277             depnames = (deporigin != NULL) ? matchbyorigin(deporigin, NULL) :
 278                                              NULL;
 279             if (depnames == NULL) {
 280                 depnames = alloca(sizeof(*depnames) * 2);
 281                 depnames[0] = p->name;
 282                 depnames[1] = NULL;
 283             }
 284             for (i = 0; depnames[i] != NULL; i++)
 285                 undepend(depnames[i], pkg);
 286         }
 287     }
 288
 289     if (chdir(home) == FAIL) {
 290         cleanup(0);
 291         errx(2, "%s: unable to return to working directory %s!", __func__,
 292             home);
 293     }
 294
 295     /*
 296      * Some packages aren't packed right, so we need to just ignore
 297      * delete_package()'s status.  Ugh! :-(
 298      */
 299     if (delete_package(FALSE, CleanDirs, &Plist) == FAIL)
 300         warnx(
 301         "couldn't entirely delete package (perhaps the packing list is\n"
 302         "incorrectly specified?)");
 303
 304     if (chdir(LogDir) == FAIL) {
 305         warnx("unable to change directory to %s! deinstall failed", LogDir);
 306         return 1;
 307     }
 308
 309     if (!NoDeInstall && post_script != NULL && fexists(post_script)) {
 310         if (Fake)
 311             printf("Would execute post-deinstall script at this point.\n");
 312         else {
 313             vsystem("/bin/chmod +x %s", post_script);   /* make sure */
 314             if (vsystem("./%s %s %s", post_script, pkg, post_arg)) {
 315                 warnx("post-deinstall script returned error status");
 316                 if (!Force)
 317                     return 1;
 318             }
 319         }
 320     }
 321
 322     if (chdir(home) == FAIL) {
 323         cleanup(0);
 324         errx(2, "%s: unable to return to working directory %s!", __func__,
 325             home);
 326     }
 327
 328     if (!Fake) {
 329         if (vsystem("%s -r%c %s", REMOVE_CMD, Force ? 'f' : ' ', LogDir)) {
 330             warnx("couldn't remove log entry in %s, deinstall failed", LogDir);
 331             if (!Force)
 332                 return 1;
 333         }
 334     }
 335     return 0;
 336 }
 337
 338 static void
 339 sanity_check(char *pkg)
 340 {
 341     if (!fexists(CONTENTS_FNAME)) {
 342         cleanup(0);
 343         errx(2, "%s: installed package %s has no %s file!", __func__,
 344             pkg, CONTENTS_FNAME);
 345     }
 346 }
 347
 348 void
 349 cleanup(int sig)
 350 {
 351     if (sig)
 352         exit(1);
 353 }
 354
 355 static void
 356 undepend(char *p, char *pkgname)
 357 {
 358     char fname[FILENAME_MAX], ftmp[FILENAME_MAX];
 359     FILE *fpwr;
 360     int s;
 361     struct reqr_by_entry *rb_entry;
 362     struct reqr_by_head *rb_list;
 363
 364
 365     if (requiredby(p, &rb_list, Verbose, FALSE) <= 0)
 366         return;
 367     snprintf(fname, sizeof(fname), "%s/%s/%s", LOG_DIR, p, REQUIRED_BY_FNAME);
 368     snprintf(ftmp, sizeof(ftmp), "%s.XXXXXX", fname);
 369     s = mkstemp(ftmp);
 370     if (s == -1) {
 371         warnx("couldn't open temp file '%s'", ftmp);
 372         return;
 373     }
 374     fpwr = fdopen(s, "w");
 375     if (fpwr == NULL) {
 376         close(s);
 377         warnx("couldn't fdopen temp file '%s'", ftmp);
 378         goto cleanexit;
 379     }
 380     STAILQ_FOREACH(rb_entry, rb_list, link)
 381         if (strcmp(rb_entry->pkgname, pkgname))         /* no match */
 382             fputs(rb_entry->pkgname, fpwr), putc('\n', fpwr);
 383     if (fchmod(s, 0644) == FAIL) {
 384         warnx("error changing permission of temp file '%s'", ftmp);
 385         fclose(fpwr);
 386         goto cleanexit;
 387     }
 388     if (fclose(fpwr) == EOF) {
 389         warnx("error closing temp file '%s'", ftmp);
 390         goto cleanexit;
 391     }
 392     if (rename(ftmp, fname) == -1)
 393         warnx("error renaming '%s' to '%s'", ftmp, fname);
 394 cleanexit:
 395     remove(ftmp);
 396     return;
 397 }