LCOV - code coverage report
Current view: top level - src - data-compat.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 30 87 34.5 %
Date: 2018-11-15 08:49:49 Functions: 2 6 33.3 %

          Line data    Source code
       1             : /* data-compat.c - Compatibility interfaces for data objects.
       2             :    Copyright (C) 2002, 2003, 2004, 2007 g10 Code GmbH
       3             : 
       4             :    This file is part of GPGME.
       5             : 
       6             :    GPGME is free software; you can redistribute it and/or modify it
       7             :    under the terms of the GNU Lesser General Public License as
       8             :    published by the Free Software Foundation; either version 2.1 of
       9             :    the License, or (at your option) any later version.
      10             : 
      11             :    GPGME is distributed in the hope that it will be useful, but
      12             :    WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14             :    Lesser General Public License for more details.
      15             : 
      16             :    You should have received a copy of the GNU Lesser General Public
      17             :    License along with this program; if not, write to the Free Software
      18             :    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
      19             :    02111-1307, USA.  */
      20             : 
      21             : #if HAVE_CONFIG_H
      22             : #include <config.h>
      23             : #endif
      24             : 
      25             : #include <errno.h>
      26             : #ifdef HAVE_SYS_TIME_H
      27             : # include <sys/time.h>
      28             : #endif
      29             : #ifdef HAVE_SYS_STAT_H
      30             : # include <sys/stat.h>
      31             : #endif
      32             : #include <stdlib.h>
      33             : 
      34             : #include "data.h"
      35             : #include "util.h"
      36             : #include "debug.h"
      37             : 
      38             : 
      39             : /* Create a new data buffer filled with LENGTH bytes starting from
      40             :    OFFSET within the file FNAME or stream STREAM (exactly one must be
      41             :    non-zero).  */
      42             : gpgme_error_t
      43          58 : gpgme_data_new_from_filepart (gpgme_data_t *r_dh, const char *fname,
      44             :                               FILE *stream, gpgme_off_t offset, size_t length)
      45             : {
      46             :   gpgme_error_t err;
      47          58 :   char *buf = NULL;
      48             :   int res;
      49             : 
      50          58 :   TRACE_BEG4 (DEBUG_DATA, "gpgme_data_new_from_filepart", r_dh,
      51             :               "file_name=%s, stream=%p, offset=%lli, length=%u",
      52             :               fname, stream, offset, length);
      53             : 
      54          58 :   if (stream && fname)
      55           0 :     return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));
      56             : 
      57          58 :   if (fname)
      58          55 :     stream = fopen (fname, "rb");
      59          58 :   if (!stream)
      60           1 :     return TRACE_ERR (gpg_error_from_syserror ());
      61             : 
      62             : #ifdef HAVE_FSEEKO
      63          57 :   res = fseeko (stream, offset, SEEK_SET);
      64             : #else
      65             :   /* FIXME: Check for overflow, or at least bail at compilation.  */
      66             :   res = fseek (stream, offset, SEEK_SET);
      67             : #endif
      68             : 
      69          57 :   if (res)
      70             :     {
      71           0 :       int saved_err = gpg_error_from_syserror ();
      72           0 :       if (fname)
      73           0 :         fclose (stream);
      74           0 :       return TRACE_ERR (saved_err);
      75             :     }
      76             : 
      77          57 :   buf = malloc (length);
      78          57 :   if (!buf)
      79             :     {
      80           0 :       int saved_err = gpg_error_from_syserror ();
      81           0 :       if (fname)
      82           0 :         fclose (stream);
      83           0 :       return TRACE_ERR (saved_err);
      84             :     }
      85             : 
      86          57 :   while (fread (buf, length, 1, stream) < 1
      87           0 :          && ferror (stream) && errno == EINTR);
      88          57 :   if (ferror (stream))
      89             :     {
      90           0 :       int saved_err = gpg_error_from_syserror ();
      91           0 :       if (buf)
      92           0 :         free (buf);
      93           0 :       if (fname)
      94           0 :         fclose (stream);
      95           0 :       return TRACE_ERR (saved_err);
      96             :     }
      97             : 
      98          57 :   if (fname)
      99          54 :     fclose (stream);
     100             : 
     101          57 :   err = gpgme_data_new (r_dh);
     102          57 :   if (err)
     103             :     {
     104           0 :       if (buf)
     105           0 :         free (buf);
     106           0 :       return err;
     107             :     }
     108             : 
     109          57 :   (*r_dh)->data.mem.buffer = buf;
     110          57 :   (*r_dh)->data.mem.size = length;
     111          57 :   (*r_dh)->data.mem.length = length;
     112             : 
     113          57 :   return TRACE_SUC1 ("r_dh=%p", *r_dh);
     114             : }
     115             : 
     116             : 
     117             : /* Create a new data buffer filled with the content of file FNAME.
     118             :    COPY must be non-zero (delayed reads are not supported yet).  */
     119             : gpgme_error_t
     120          53 : gpgme_data_new_from_file (gpgme_data_t *r_dh, const char *fname, int copy)
     121             : {
     122             :   gpgme_error_t err;
     123             :   struct stat statbuf;
     124          53 :   TRACE_BEG3 (DEBUG_DATA, "gpgme_data_new_from_file", r_dh,
     125             :               "file_name=%s, copy=%i (%s)", fname, copy, copy ? "yes" : "no");
     126             : 
     127          53 :   if (!fname || !copy)
     128           1 :     return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));
     129             : 
     130          52 :   if (stat (fname, &statbuf) < 0)
     131           1 :     return TRACE_ERR (gpg_error_from_syserror ());
     132             : 
     133          51 :   err = gpgme_data_new_from_filepart (r_dh, fname, NULL, 0, statbuf.st_size);
     134          51 :   return TRACE_ERR (err);
     135             : }
     136             : 
     137             : 
     138             : static int
     139           0 : gpgme_error_to_errno (gpgme_error_t err)
     140             : {
     141           0 :   int res = gpg_err_code_to_errno (gpg_err_code (err));
     142             : 
     143           0 :   if (!err)
     144             :     {
     145           0 :       switch (gpg_err_code (err))
     146             :         {
     147             :         case GPG_ERR_EOF:
     148           0 :           res = 0;
     149           0 :           break;
     150             :         case GPG_ERR_INV_VALUE:
     151           0 :           res = EINVAL;
     152           0 :           break;
     153             :         case GPG_ERR_NOT_SUPPORTED:
     154           0 :           res = ENOSYS;
     155           0 :           break;
     156             :         default:
     157             :           /* FIXME: Yeah, well.  */
     158           0 :           res = EINVAL;
     159           0 :           break;
     160             :         }
     161             :     }
     162           0 :   TRACE3 (DEBUG_DATA, "gpgme:gpgme_error_to_errno", 0,
     163             :           "mapping %s <%s> to: %s", gpgme_strerror (err),
     164             :           gpgme_strsource (err), strerror (res));
     165           0 :   gpg_err_set_errno (res);
     166           0 :   return res ? -1 : 0;
     167             : }
     168             : 
     169             : 
     170             : static gpgme_ssize_t
     171           0 : old_user_read (gpgme_data_t dh, void *buffer, size_t size)
     172             : {
     173             :   gpgme_error_t err;
     174             :   size_t amt;
     175           0 :   TRACE_BEG2 (DEBUG_DATA, "gpgme:old_user_read", dh,
     176             :               "buffer=%p, size=%u", buffer, size);
     177             : 
     178           0 :   err = (*dh->data.old_user.cb) (dh->data.old_user.handle,
     179             :                                  buffer, size, &amt);
     180           0 :   if (err)
     181           0 :     return TRACE_SYSRES (gpgme_error_to_errno (err));
     182           0 :   return TRACE_SYSRES ((gpgme_ssize_t)amt);
     183             : }
     184             : 
     185             : 
     186             : static gpgme_off_t
     187           0 : old_user_seek (gpgme_data_t dh, gpgme_off_t offset, int whence)
     188             : {
     189             :   gpgme_error_t err;
     190           0 :   TRACE_BEG2 (DEBUG_DATA, "gpgme:old_user_seek", dh,
     191             :               "offset=%llu, whence=%i", offset, whence);
     192             : 
     193           0 :   if (whence != SEEK_SET || offset)
     194             :     {
     195           0 :       gpg_err_set_errno (EINVAL);
     196           0 :       return TRACE_SYSRES (-1);
     197             :     }
     198           0 :   err = (*dh->data.old_user.cb) (dh->data.old_user.handle, NULL, 0, NULL);
     199           0 :   if (err)
     200           0 :     return TRACE_SYSRES (gpgme_error_to_errno (err));
     201           0 :   return TRACE_SYSRES (0);
     202             : }
     203             : 
     204             : 
     205             : static struct _gpgme_data_cbs old_user_cbs =
     206             :   {
     207             :     old_user_read,
     208             :     NULL,
     209             :     old_user_seek,
     210             :     NULL
     211             :   };
     212             : 
     213             : 
     214             : /* Create a new data buffer which retrieves the data from the callback
     215             :    function READ_CB.  */
     216             : gpgme_error_t
     217           0 : gpgme_data_new_with_read_cb (gpgme_data_t *r_dh,
     218             :                              int (*read_cb) (void *, char *, size_t, size_t *),
     219             :                              void *read_cb_value)
     220             : {
     221             :   gpgme_error_t err;
     222           0 :   TRACE_BEG2 (DEBUG_DATA, "gpgme_data_new_with_read_cb", r_dh,
     223             :               "read_cb=%p/%p", read_cb, read_cb_value);
     224             : 
     225           0 :   err = _gpgme_data_new (r_dh, &old_user_cbs);
     226             : 
     227           0 :   if (err)
     228           0 :     return TRACE_ERR (err);
     229             : 
     230           0 :   (*r_dh)->data.old_user.cb = read_cb;
     231           0 :   (*r_dh)->data.old_user.handle = read_cb_value;
     232           0 :   return TRACE_ERR (0);
     233             : }

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