LCOV - code coverage report
Current view: top level - lib/dpkg - db-fsys-load.c (source / functions) Coverage Total Hit
Test: dpkg 1.22.7-3-g89f48 C code coverage Lines: 71.4 % 28 20
Test Date: 2024-07-17 02:53:43 Functions: 100.0 % 1 1
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 55.6 % 18 10

             Branch data     Line data    Source code
       1                 :             : /*
       2                 :             :  * libdpkg - Debian packaging suite library routines
       3                 :             :  * db-fsys-load.c - (re)loading of database of files installed on system
       4                 :             :  *
       5                 :             :  * Copyright © 2008-2024 Guillem Jover <guillem@debian.org>
       6                 :             :  * Copyright © 2022 Simon Richter <sjr@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                 :             : 
      30                 :             : #include <dpkg/dpkg.h>
      31                 :             : #include <dpkg/dpkg-db.h>
      32                 :             : #include <dpkg/db-fsys.h>
      33                 :             : #include <dpkg/i18n.h>
      34                 :             : #include <dpkg/debug.h>
      35                 :             : 
      36                 :             : enum dpkg_db_error
      37                 :          74 : dpkg_db_reopen(struct dpkg_db *db)
      38                 :             : {
      39                 :             :         struct stat st_next;
      40                 :             :         FILE *file_next;
      41                 :             : 
      42         [ +  - ]:          74 :         if (db->pathname == NULL)
      43                 :          74 :                 db->pathname = dpkg_db_get_path(db->name);
      44                 :             : 
      45                 :          74 :         onerr_abort++;
      46                 :             : 
      47                 :          74 :         file_next = fopen(db->pathname, "r");
      48         [ +  + ]:          74 :         if (!file_next) {
      49         [ +  + ]:           2 :                 if (errno != ENOENT)
      50                 :           1 :                         ohshite(_("cannot open %s file"), db->pathname);
      51                 :             :         } else {
      52                 :          72 :                 setcloexec(fileno(file_next), db->pathname);
      53                 :             : 
      54         [ -  + ]:          72 :                 if (fstat(fileno(file_next), &st_next))
      55                 :           0 :                         ohshite(_("cannot get %s file metadata"), db->pathname);
      56                 :             : 
      57                 :             :                 /*
      58                 :             :                  * We need to keep the database file open so that the
      59                 :             :                  * filesystem cannot reuse the inode number (f.ex. during
      60                 :             :                  * multiple dpkg-divert invocations in a maintainer script),
      61                 :             :                  * otherwise the following check might turn true, and we
      62                 :             :                  * would skip reloading a modified database.
      63                 :             :                  */
      64         [ -  + ]:          72 :                 if (db->file &&
      65         [ #  # ]:           0 :                     db->st.st_dev == st_next.st_dev &&
      66         [ #  # ]:           0 :                     db->st.st_ino == st_next.st_ino) {
      67                 :           0 :                         fclose(file_next);
      68                 :           0 :                         onerr_abort--;
      69                 :             : 
      70                 :           0 :                         debug(dbg_general, "%s: unchanged %s, skipping",
      71                 :             :                               __func__, db->pathname);
      72                 :           0 :                         return DPKG_DB_SAME;
      73                 :             :                 }
      74                 :          72 :                 db->st = st_next;
      75                 :             :         }
      76         [ -  + ]:          73 :         if (db->file)
      77                 :           0 :                 fclose(db->file);
      78                 :          73 :         db->file = file_next;
      79                 :             : 
      80                 :          73 :         onerr_abort--;
      81                 :             : 
      82         [ +  + ]:          73 :         if (db->file) {
      83                 :          72 :                 debug(dbg_general, "%s: new %s, (re)loading",
      84                 :             :                       __func__, db->pathname);
      85                 :          72 :                 return DPKG_DB_LOAD;
      86                 :             :         } else {
      87                 :           1 :                 debug(dbg_general, "%s: missing %s, resetting",
      88                 :             :                       __func__, db->pathname);
      89                 :           1 :                 return DPKG_DB_NONE;
      90                 :             :         }
      91                 :             : }
        

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