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       1                 :            : /*
       2                 :            :  * libdpkg - Debian packaging suite library routines
       3                 :            :  * db-ctrl-access.c - package control information database
       4                 :            :  *
       5                 :            :  * Copyright © 1995 Ian Jackson <ijackson@chiark.greenend.org.uk>
       6                 :            :  * Copyright © 2011-2014 Guillem Jover <guillem@debian.org>
       7                 :            :  *
       8                 :            :  * This is free software; you can redistribute it and/or modify
       9                 :            :  * it under the terms of the GNU General Public License as published by
      10                 :            :  * the Free Software Foundation; either version 2 of the License, or
      11                 :            :  * (at your option) any later version.
      12                 :            :  *
      13                 :            :  * This is distributed in the hope that it will be useful,
      14                 :            :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      15                 :            :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      16                 :            :  * GNU General Public License for more details.
      17                 :            :  *
      18                 :            :  * You should have received a copy of the GNU General Public License
      19                 :            :  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
      20                 :            :  */
      21                 :            : 
      22                 :            : #include <config.h>
      23                 :            : #include <compat.h>
      24                 :            : 
      25                 :            : #include <sys/types.h>
      26                 :            : #include <sys/stat.h>
      27                 :            : 
      28                 :            : #include <errno.h>
      29                 :            : #include <dirent.h>
      30                 :            : #include <unistd.h>
      31                 :            : 
      32                 :            : #include <dpkg/i18n.h>
      33                 :            : #include <dpkg/dpkg.h>
      34                 :            : #include <dpkg/dpkg-db.h>
      35                 :            : #include <dpkg/fsys.h>
      36                 :            : #include <dpkg/db-ctrl.h>
      37                 :            : #include <dpkg/debug.h>
      38                 :            : 
      39                 :            : bool
      40                 :          0 : pkg_infodb_has_file(struct pkginfo *pkg, struct pkgbin *pkgbin,
      41                 :            :                     const char *name)
      42                 :            : {
      43                 :            :         const char *filename;
      44                 :            :         struct stat stab;
      45                 :            : 
      46                 :          0 :         filename = pkg_infodb_get_file(pkg, pkgbin, name);
      47         [ #  # ]:          0 :         if (lstat(filename, &stab) == 0)
      48                 :          0 :                 return true;
      49         [ #  # ]:          0 :         else if (errno == ENOENT)
      50                 :          0 :                 return false;
      51                 :            :         else
      52                 :          0 :                 ohshite(_("unable to check existence of '%.250s'"), filename);
      53                 :            : }
      54                 :            : 
      55                 :            : void
      56                 :          0 : pkg_infodb_foreach(struct pkginfo *pkg, struct pkgbin *pkgbin,
      57                 :            :                    pkg_infodb_file_func *func)
      58                 :            : {
      59                 :            :         DIR *db_dir;
      60                 :            :         struct dirent *db_de;
      61                 :            :         struct varbuf_state db_path_state;
      62                 :          0 :         struct varbuf db_path = VARBUF_INIT;
      63                 :            :         const char *pkgname;
      64                 :            :         enum pkg_infodb_format db_format;
      65                 :            : 
      66                 :            :         /* Make sure to always read and verify the format version. */
      67                 :          0 :         db_format = pkg_infodb_get_format();
      68                 :            : 
      69   [ #  #  #  # ]:          0 :         if (pkgbin->multiarch == PKG_MULTIARCH_SAME &&
      70                 :            :             db_format == PKG_INFODB_FORMAT_MULTIARCH)
      71                 :          0 :                 pkgname = pkgbin_name(pkg, pkgbin, pnaw_always);
      72                 :            :         else
      73                 :          0 :                 pkgname = pkgbin_name(pkg, pkgbin, pnaw_never);
      74                 :            : 
      75                 :          0 :         varbuf_add_dir(&db_path, pkg_infodb_get_dir());
      76                 :          0 :         varbuf_end_str(&db_path);
      77                 :          0 :         varbuf_snapshot(&db_path, &db_path_state);
      78                 :            : 
      79                 :          0 :         db_dir = opendir(db_path.buf);
      80         [ #  # ]:          0 :         if (!db_dir)
      81                 :          0 :                 ohshite(_("cannot read info directory"));
      82                 :            : 
      83                 :          0 :         push_cleanup(cu_closedir, ~0, 1, (void *)db_dir);
      84         [ #  # ]:          0 :         while ((db_de = readdir(db_dir)) != NULL) {
      85                 :            :                 const char *filename, *filetype, *dot;
      86                 :            : 
      87                 :          0 :                 debug(dbg_veryverbose, "infodb foreach info file '%s'",
      88                 :          0 :                       db_de->d_name);
      89                 :            : 
      90                 :            :                 /* Ignore dotfiles, including ‘.’ and ‘..’. */
      91         [ #  # ]:          0 :                 if (db_de->d_name[0] == '.')
      92                 :          0 :                         continue;
      93                 :            : 
      94                 :            :                 /* Ignore anything odd. */
      95                 :          0 :                 dot = strrchr(db_de->d_name, '.');
      96         [ #  # ]:          0 :                 if (dot == NULL)
      97                 :          0 :                         continue;
      98                 :            : 
      99                 :            :                 /* Ignore files from other packages. */
     100         [ #  # ]:          0 :                 if (strlen(pkgname) != (size_t)(dot - db_de->d_name) ||
     101         [ #  # ]:          0 :                     strncmp(db_de->d_name, pkgname, dot - db_de->d_name))
     102                 :          0 :                         continue;
     103                 :            : 
     104                 :          0 :                 debug(dbg_stupidlyverbose, "infodb foreach file this pkg");
     105                 :            : 
     106                 :            :                 /* Skip past the full stop. */
     107                 :          0 :                 filetype = dot + 1;
     108                 :            : 
     109                 :          0 :                 varbuf_rollback(&db_path_state);
     110                 :          0 :                 varbuf_add_str(&db_path, db_de->d_name);
     111                 :          0 :                 varbuf_end_str(&db_path);
     112                 :          0 :                 filename = db_path.buf;
     113                 :            : 
     114                 :          0 :                 func(filename, filetype);
     115                 :            :         }
     116                 :          0 :         pop_cleanup(ehflag_normaltidy); /* closedir */
     117                 :            : 
     118                 :          0 :         varbuf_destroy(&db_path);
     119                 :          0 : }