libbrownie/drd64_libbrownie_searchlib.c

   1 /*DrDeAmOn64DrDeAmOn64DrDeAmOn64DrDeAmOn64DrDeAmOn64DrDeAmOn64DrDeAmOn64
   2
   3                          D r . D e a m o n  6 4
   4                         for INTEL64(R), AMD64(R)
   5
   6    Copyright(C) 2007-2009 Koine Yuusuke(koinec). All rights reserved.
   7
   8 Redistribution and use in source and binary forms, with or without
   9 modification, are permitted provided that the following conditions are met:
  10
  11  1. Redistributions of source code must retain the above copyright notice,
  12     this list of conditions and the following disclaimer.
  13  2. Redistributions in binary form must reproduce the above copyright
  14     notice, this list of conditions and the following disclaimer in the
  15     documentation and/or other materials provided with the distribution.
  16
  17 THIS SOFTWARE IS PROVIDED BY Koine Yuusuke(koinec) ``AS IS'' AND ANY
  18 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  20 DISCLAIMED. IN NO EVENT SHALL Koine Yuusuke(koinec) OR CONTRIBUTORS BE
  21 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  22 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  23 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  25 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  26 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  27 OF THE POSSIBILITY OF SUCH DAMAGE.
  28
  29 DrDeAmOn64DrDeAmOn64DrDeAmOn64DrDeAmOn64DrDeAmOn64DrDeAmOn64DrDeAmOn64*/
  30
  31 /* File Info -----------------------------------------------------------
  32 File: drd64_.c
  33 Function:
  34 Comment:
  35 ----------------------------------------------------------------------*/
  36
  37 #define DRD64_SRC_LIBBROWNIE_SEARCHLIB
  38 #include"drd64_libbrownie.h"
  39
  40
  41 /*----------------------------------------------------------------------
  42 Is Exist the Library File in dir (pstr_path & "/" & pstr_solibname)
  43
  44 Return:
  45          0x00: OK (exist LibraryFile)
  46         -0x01: Path + .so FileName string size over.
  47
  48 int LibBrownie_SearchLib_IsExistLibrary(
  49         char    *pstr_path,                     // Library Dir. string
  50         char    *pstr_solibname         // Library(.so) FileName
  51 )
  52 ----------------------------------------------------------------------*/
  53 int
  54         SearchLib_IsExistLibrary(
  55                         char    *pstr_path,
  56                         char    *pstr_solibname )
  57 {
  58         int             i_result;
  59         size_t  sz_len;
  60         struct  stat    t_filestat;
  61         char    str_solibpath[DRD64_MAX_PATH];
  62
  63         // Check Library Path & FileName Size ---
  64         sz_len  = strnlen( pstr_path, DRD64_MAX_PATH );
  65         sz_len  += strnlen( pstr_solibname, DRD64_MAX_PATH );
  66
  67         if( DRD64_MAX_PATH - 1 <= sz_len )      {
  68                 return -0x01;
  69         }
  70
  71         strncpy( str_solibpath, pstr_path, DRD64_MAX_PATH );
  72         strncat( str_solibpath, "/", DRD64_MAX_PATH );
  73         strncat( str_solibpath, pstr_solibname, DRD64_MAX_PATH );
  74         i_result        = stat( str_solibpath, &t_filestat );
  75
  76         return i_result;
  77 }
  78
  79
  80 /*----------------------------------------------------------------------
  81 Search & Get Library Exist-Path from colon-separated Path Lists.
  82 ----------------------------------------------------------------------*/
  83 int
  84         SearchLib_SearchLibInPathArrays(
  85                         char    *pstr_solibpath,        // out
  86                         char    *pstr_pathlist,         // in
  87                         char    *pstr_solibname )       // in
  88 {
  89         int             i_flag;
  90         int             i_result;
  91         int             i_err;
  92         size_t  sz_len;
  93         char    *pstr_pathtemp;
  94         char    *pstr_nowpath;
  95         char    *pstr_nowpos;
  96
  97         // alloc & copy pstr_pathlist -> pstr_pathtemp ---
  98         sz_len  = strlen( pstr_pathlist );
  99         pstr_pathtemp   = (char *)alloca( sz_len + 1 );
 100         strncpy( pstr_pathtemp, pstr_pathlist, sz_len + 1 );
 101
 102         i_result                = -0x01;
 103         i_flag                  = 0x00;
 104         pstr_nowpath    = pstr_pathtemp;
 105         pstr_nowpos             = pstr_pathtemp;
 106         do{
 107                 if(( ':' == *pstr_nowpos ) || ( '\0' == *pstr_nowpos))  {
 108                         if( '\0' == *pstr_nowpos )      { i_flag        = 0x01; }
 109                         else                                            { *pstr_nowpos  = '\0'; }
 110
 111                         i_err   = SearchLib_IsExistLibrary( pstr_nowpath, pstr_solibname );
 112                         if( 0x00 == i_err )     {
 113                                 i_result        = 0x00;
 114                                 strncpy( pstr_solibpath, pstr_nowpath, DRD64_MAX_PATH );
 115                                 goto goto_SearchLib_SearchLibInPathArrays_post;
 116                         }
 117
 118                         if( 0x00 == i_flag )    { *pstr_nowpos  = ':'; }
 119
 120                         pstr_nowpath    = pstr_nowpos + 1;
 121                 }
 122
 123         }while( '\0' != *pstr_nowpos++ );
 124
 125 goto_SearchLib_SearchLibInPathArrays_post:
 126         return i_result;
 127 }
 128
 129
 130 /***********************************************************************
 131 int LibBrownie_GetLibraryPath(
 132         char    *pstr_solibpath,        [OUT] .so existed Library FullPath
 133         char    *pstr_solibname,        [IN] .so Library Filename
 134         char    *pstr_dt_rpath,         [IN] RPATH string from .dynamic seciton
 135         char    *pstr_dt_runpath,       [IN] RUNPATH string from .dynamic seciton
 136         char    *pstr_ldsohints         [IN] LD_LIBRARYPATH env string.
 137 )
 138
 139  * LocalLibrary ( if pstr_rpath != NULL )
 140     pstr_solibpath = pstr_rpath & "/" & pstr_solibname
 141
 142 ***********************************************************************/
 143 LIBBROWNIE_SEARCHLIB_API
 144 int
 145         LibBrownie_GetLibraryPath(
 146                         char    *pstr_solibpath,
 147                         char    *pstr_solibname,
 148                         char    *pstr_dt_rpath,
 149                         char    *pstr_dt_runpath,
 150                         char    *pstr_env_ldlibpath,
 151                         char    *pstr_ldsohints )
 152 {
 153         int             i_err;
 154         int             i_result        = 0x00;
 155
 156         if( NULL == pstr_solibpath )    {
 157                 return -0x01;
 158         }
 159
 160         if( NULL == pstr_ldsohints )    {
 161                 return -0x02;
 162         }
 163
 164         // <Order Info from man ld.so>------------------------------------------
 165         //   1. DT_RPATH of the referencing object unless that object also
 166         //      contains a DT_RUNPATH tag
 167         //   2. DT_RPATH of the program unless the referencing object contains
 168         //      a DT_RUNPATH tag
 169         if( NULL != pstr_dt_rpath )     {
 170                 // XXX: pstr_dt_runpath != NULL for WARNING!!
 171                 i_err   = SearchLib_SearchLibInPathArrays(
 172                                                         pstr_solibpath, pstr_dt_rpath, pstr_solibname );
 173                 if( 0x00 == i_err )     {
 174                         i_result        = 0x01;
 175                         goto goto_LibBrownie_GetLibraryPath_post;
 176                 }
 177         }
 178
 179         // <Order Info from man ld.so>------------------------------------------
 180         // 3.   Path indicated by LD_LIBRARY_PATH environment variable
 181         if( NULL != pstr_env_ldlibpath )        {
 182                 i_err   = SearchLib_SearchLibInPathArrays(
 183                                                         pstr_solibpath, pstr_env_ldlibpath, pstr_solibname );
 184                 if( 0x00 == i_err )     {
 185                         i_result        = 0x03;
 186                         goto goto_LibBrownie_GetLibraryPath_post;
 187                 }
 188         }
 189
 190         // <Order Info from man ld.so>------------------------------------------
 191         // 4.   DT_RUNPATH of the referencing object
 192         if( NULL != pstr_dt_runpath )   {
 193                 i_err   = SearchLib_SearchLibInPathArrays(
 194                                                         pstr_solibpath, pstr_dt_runpath, pstr_solibname );
 195                 if( 0x00 == i_err )     {
 196                         i_result        = 0x04;
 197                         goto goto_LibBrownie_GetLibraryPath_post;
 198                 }
 199         }
 200
 201         // <Order Info from man ld.so>------------------------------------------
 202         // 5.   Hints file produced by the ldconfig(8) utility
 203         i_err   = SearchLib_SearchLibInPathArrays(
 204                                                         pstr_solibpath, pstr_ldsohints, pstr_solibname );
 205         if( 0x00 == i_err )     {
 206                 i_result        = 0x05;
 207                 goto goto_LibBrownie_GetLibraryPath_post;
 208         }
 209
 210         // 6.   The /lib and /usr/lib directories, unless the referencing
 211         //      object was linked using the "-z nodefaultlib" option
 212         i_err   = SearchLib_SearchLibInPathArrays(
 213                                                         pstr_solibpath, "/lib:/usr/lib", pstr_solibname );
 214         if( 0x00 == i_err )     {
 215                 i_result        = 0x06;
 216         }
 217
 218 goto_LibBrownie_GetLibraryPath_post:
 219
 220         return i_result;
 221 }
 222
 223
 224 /* EOF of drd64_.c ----------------------------------- */