1  /* Implementation of the SYMLNK intrinsic.
       2     Copyright (C) 2005-2023 Free Software Foundation, Inc.
       3     Contributed by François-Xavier Coudert <coudert@clipper.ens.fr>
       4  
       5  This file is part of the GNU Fortran runtime library (libgfortran).
       6  
       7  Libgfortran is free software; you can redistribute it and/or
       8  modify it under the terms of the GNU General Public
       9  License as published by the Free Software Foundation; either
      10  version 3 of the License, or (at your option) any later version.
      11  
      12  Libgfortran 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  Under Section 7 of GPL version 3, you are granted additional
      18  permissions described in the GCC Runtime Library Exception, version
      19  3.1, as published by the Free Software Foundation.
      20  
      21  You should have received a copy of the GNU General Public License and
      22  a copy of the GCC Runtime Library Exception along with this program;
      23  see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
      24  <http://www.gnu.org/licenses/>.  */
      25  
      26  #include "libgfortran.h"
      27  
      28  #include <errno.h>
      29  
      30  #ifdef HAVE_UNISTD_H
      31  #include <unistd.h>
      32  #endif
      33  
      34  /* SUBROUTINE SYMLNK(PATH1, PATH2, STATUS)
      35     CHARACTER(len=*), INTENT(IN) :: PATH1, PATH2
      36     INTEGER, INTENT(OUT), OPTIONAL :: STATUS  */
      37  
      38  #ifdef HAVE_SYMLINK
      39  static int
      40  symlnk_internal (char *path1, char *path2, gfc_charlen_type path1_len,
      41  		 gfc_charlen_type path2_len)
      42  {
      43    char *str1 = fc_strdup (path1, path1_len);
      44    char *str2 = fc_strdup (path2, path2_len);
      45    int val = symlink (str1, str2);
      46    free (str1);
      47    free (str2);
      48    return ((val == 0) ? 0 : errno);
      49  }
      50  
      51  extern void symlnk_i4_sub (char *, char *, GFC_INTEGER_4 *, gfc_charlen_type,
      52  	                 gfc_charlen_type);
      53  iexport_proto(symlnk_i4_sub);
      54  
      55  void
      56  symlnk_i4_sub (char *path1, char *path2, GFC_INTEGER_4 *status,
      57               gfc_charlen_type path1_len, gfc_charlen_type path2_len)
      58  {
      59    int val = symlnk_internal (path1, path2, path1_len, path2_len);
      60    if (status != NULL)
      61      *status = val;
      62  }
      63  iexport(symlnk_i4_sub);
      64  
      65  extern void symlnk_i8_sub (char *, char *, GFC_INTEGER_8 *, gfc_charlen_type,
      66  	                 gfc_charlen_type);
      67  iexport_proto(symlnk_i8_sub);
      68  
      69  void
      70  symlnk_i8_sub (char *path1, char *path2, GFC_INTEGER_8 *status,
      71               gfc_charlen_type path1_len, gfc_charlen_type path2_len)
      72  {
      73    int val = symlnk_internal (path1, path2, path1_len, path2_len);
      74    if (status != NULL)
      75      *status = val;
      76  }
      77  iexport(symlnk_i8_sub);
      78  
      79  extern GFC_INTEGER_4 symlnk_i4 (char *, char *, gfc_charlen_type,
      80  	                      gfc_charlen_type);
      81  export_proto(symlnk_i4);
      82  
      83  GFC_INTEGER_4
      84  symlnk_i4 (char *path1, char *path2, gfc_charlen_type path1_len,
      85           gfc_charlen_type path2_len)
      86  {
      87    return symlnk_internal (path1, path2, path1_len, path2_len);
      88  }
      89  
      90  extern GFC_INTEGER_8 symlnk_i8 (char *, char *, gfc_charlen_type,
      91  	                      gfc_charlen_type);
      92  export_proto(symlnk_i8);
      93  
      94  GFC_INTEGER_8
      95  symlnk_i8 (char *path1, char *path2, gfc_charlen_type path1_len,
      96  	 gfc_charlen_type path2_len)
      97  {
      98    return symlnk_internal (path1, path2, path1_len, path2_len);
      99  }
     100  #endif