LCOV - code coverage report
Current view: top level - lib/dpkg - db-fsys-digest.c (source / functions) Hit Total Coverage
Test: dpkg 1.21.11 C code coverage Lines: 0 55 0.0 %
Date: 2022-12-03 00:40:01 Functions: 0 3 0.0 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 0 32 0.0 %

           Branch data     Line data    Source code
       1                 :            : /*
       2                 :            :  * libdpkg - Debian packaging suite library routines
       3                 :            :  * db-fsys-digest.c - management of filesystem digests database
       4                 :            :  *
       5                 :            :  * Copyright © 2012-2014 Guillem Jover <guillem@debian.org>
       6                 :            :  *
       7                 :            :  * This is free software; you can redistribute it and/or modify
       8                 :            :  * it under the terms of the GNU General Public License as published by
       9                 :            :  * the Free Software Foundation; either version 2 of the License, or
      10                 :            :  * (at your option) any later version.
      11                 :            :  *
      12                 :            :  * This is distributed in the hope that it will be useful,
      13                 :            :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14                 :            :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      15                 :            :  * GNU General Public License for more details.
      16                 :            :  *
      17                 :            :  * You should have received a copy of the GNU General Public License
      18                 :            :  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
      19                 :            :  */
      20                 :            : 
      21                 :            : #include <config.h>
      22                 :            : #include <compat.h>
      23                 :            : 
      24                 :            : #include <sys/stat.h>
      25                 :            : 
      26                 :            : #include <errno.h>
      27                 :            : #include <string.h>
      28                 :            : #include <stdio.h>
      29                 :            : #include <fcntl.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/debug.h>
      36                 :            : #include <dpkg/fdio.h>
      37                 :            : #include <dpkg/dir.h>
      38                 :            : #include <dpkg/db-ctrl.h>
      39                 :            : #include <dpkg/db-fsys.h>
      40                 :            : 
      41                 :            : /*
      42                 :            :  * If mask is nonzero, will not write any file whose fsys_namenode
      43                 :            :  * has any flag bits set in mask.
      44                 :            :  */
      45                 :            : void
      46                 :          0 : write_filehash_except(struct pkginfo *pkg, struct pkgbin *pkgbin,
      47                 :            :                       struct fsys_namenode_list *list, enum fsys_namenode_flags mask)
      48                 :            : {
      49                 :            :         struct atomic_file *file;
      50                 :            :         const char *hashfile;
      51                 :            : 
      52                 :          0 :         debug(dbg_general, "generating infodb hashfile");
      53                 :            : 
      54         [ #  # ]:          0 :         if (pkg_infodb_has_file(pkg, &pkg->available, HASHFILE))
      55                 :          0 :                 return;
      56                 :            : 
      57                 :          0 :         hashfile = pkg_infodb_get_file(pkg, pkgbin, HASHFILE);
      58                 :            : 
      59                 :          0 :         file = atomic_file_new(hashfile, 0);
      60                 :          0 :         atomic_file_open(file);
      61                 :            : 
      62         [ #  # ]:          0 :         for (; list; list = list->next) {
      63                 :          0 :                  struct fsys_namenode *namenode = list->namenode;
      64                 :            : 
      65   [ #  #  #  # ]:          0 :                 if (mask && (namenode->flags & mask))
      66                 :          0 :                         continue;
      67         [ #  # ]:          0 :                 if (namenode->newhash == NULL)
      68                 :          0 :                         continue;
      69                 :            : 
      70                 :          0 :                 fprintf(file->fp, "%s  %s\n",
      71                 :          0 :                         namenode->newhash, namenode->name + 1);
      72                 :            :         }
      73                 :            : 
      74                 :          0 :         atomic_file_sync(file);
      75                 :          0 :         atomic_file_close(file);
      76                 :          0 :         atomic_file_commit(file);
      77                 :          0 :         atomic_file_free(file);
      78                 :            : 
      79                 :          0 :         dir_sync_path(pkg_infodb_get_dir());
      80                 :            : }
      81                 :            : 
      82                 :            : static void
      83                 :          0 : parse_filehash_buffer(struct varbuf *buf,
      84                 :            :                       struct pkginfo *pkg, struct pkgbin *pkgbin)
      85                 :            : {
      86                 :            :         char *thisline, *nextline;
      87                 :          0 :         const char *pkgname = pkg_name(pkg, pnaw_nonambig);
      88                 :          0 :         const char *buf_end = buf->buf + buf->used;
      89                 :            : 
      90         [ #  # ]:          0 :         for (thisline = buf->buf; thisline < buf_end; thisline = nextline) {
      91                 :            :                 struct fsys_namenode *namenode;
      92                 :            :                 char *endline, *hash_end, *filename;
      93                 :            : 
      94                 :          0 :                 endline = memchr(thisline, '\n', buf_end - thisline);
      95         [ #  # ]:          0 :                 if (endline == NULL)
      96                 :          0 :                         ohshit(_("control file '%s' for package '%s' is "
      97                 :            :                                  "missing final newline"), HASHFILE, pkgname);
      98                 :            : 
      99                 :            :                 /* The md5sum hash has a constant length. */
     100                 :          0 :                 hash_end = thisline + MD5HASHLEN;
     101                 :            : 
     102                 :          0 :                 filename = hash_end + 2;
     103         [ #  # ]:          0 :                 if (filename + 1 > endline)
     104                 :          0 :                         ohshit(_("control file '%s' for package '%s' is "
     105                 :            :                                  "missing value"), HASHFILE, pkgname);
     106                 :            : 
     107   [ #  #  #  # ]:          0 :                 if (hash_end[0] != ' ' || hash_end[1] != ' ')
     108                 :          0 :                         ohshit(_("control file '%s' for package '%s' is "
     109                 :            :                                  "missing value separator"), HASHFILE, pkgname);
     110                 :          0 :                 hash_end[0] = '\0';
     111                 :            : 
     112                 :            :                 /* Where to start next time around. */
     113                 :          0 :                 nextline = endline + 1;
     114                 :            : 
     115                 :            :                 /* Strip trailing ‘/’. */
     116   [ #  #  #  # ]:          0 :                 if (endline > thisline && endline[-1] == '/')
     117                 :          0 :                         endline--;
     118                 :          0 :                 *endline = '\0';
     119                 :            : 
     120         [ #  # ]:          0 :                 if (endline == thisline)
     121                 :          0 :                         ohshit(_("control file '%s' for package '%s' "
     122                 :            :                                  "contains empty filename"), HASHFILE, pkgname);
     123                 :            : 
     124                 :          0 :                 debug(dbg_eachfiledetail, "load digest '%s' for filename '%s'",
     125                 :            :                       thisline, filename);
     126                 :            : 
     127                 :            :                 /* Add the file to the list. */
     128                 :          0 :                 namenode = fsys_hash_find_node(filename, 0);
     129                 :          0 :                 namenode->newhash = nfstrsave(thisline);
     130                 :            :         }
     131                 :          0 : }
     132                 :            : 
     133                 :            : void
     134                 :          0 : parse_filehash(struct pkginfo *pkg, struct pkgbin *pkgbin)
     135                 :            : {
     136                 :            :         const char *hashfile;
     137                 :          0 :         struct varbuf buf = VARBUF_INIT;
     138                 :          0 :         struct dpkg_error err = DPKG_ERROR_INIT;
     139                 :            : 
     140                 :          0 :         hashfile = pkg_infodb_get_file(pkg, pkgbin, HASHFILE);
     141                 :            : 
     142   [ #  #  #  # ]:          0 :         if (file_slurp(hashfile, &buf, &err) < 0 && err.syserrno != ENOENT)
     143                 :          0 :                 dpkg_error_print(&err,
     144                 :          0 :                                  _("loading control file '%s' for package '%s'"),
     145                 :            :                                  HASHFILE, pkg_name(pkg, pnaw_nonambig));
     146                 :            : 
     147         [ #  # ]:          0 :         if (buf.used > 0)
     148                 :          0 :                 parse_filehash_buffer(&buf, pkg, pkgbin);
     149                 :            : 
     150                 :          0 :         varbuf_destroy(&buf);
     151                 :          0 : }

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