libgfortran/intrinsics/symlnk.c

   1 /* Implementation of the SYMLNK intrinsic.
   2    Copyright (C) 2005-2021 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