libgfortran/intrinsics/link.c

   1 /* Implementation of the LINK intrinsic.
   2    Copyright (C) 2005-2020 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 LINK(PATH1, PATH2, STATUS)
  35    CHARACTER(len=*), INTENT(IN) :: PATH1, PATH2
  36    INTEGER, INTENT(OUT), OPTIONAL :: STATUS  */
  37
  38 #ifdef HAVE_LINK
  39
  40 static int
  41 link_internal (char *path1, char *path2, gfc_charlen_type path1_len,
  42                gfc_charlen_type path2_len)
  43 {
  44   int val;
  45   char *str1, *str2;
  46
  47   /* Make a null terminated copy of the strings.  */
  48   str1 = fc_strdup (path1, path1_len);
  49   str2 = fc_strdup (path2, path2_len);
  50
  51   val = link (str1, str2);
  52
  53   free (str1);
  54   free (str2);
  55
  56   return ((val == 0) ? 0 : errno);
  57 }
  58
  59
  60 extern void link_i4_sub (char *, char *, GFC_INTEGER_4 *, gfc_charlen_type,
  61                          gfc_charlen_type);
  62 iexport_proto(link_i4_sub);
  63
  64 void
  65 link_i4_sub (char *path1, char *path2, GFC_INTEGER_4 *status,
  66              gfc_charlen_type path1_len, gfc_charlen_type path2_len)
  67 {
  68   int val = link_internal (path1, path2, path1_len, path2_len);
  69
  70   if (status != NULL)
  71     *status = val;
  72 }
  73 iexport(link_i4_sub);
  74
  75 extern void link_i8_sub (char *, char *, GFC_INTEGER_8 *, gfc_charlen_type,
  76                          gfc_charlen_type);
  77 iexport_proto(link_i8_sub);
  78
  79 void
  80 link_i8_sub (char *path1, char *path2, GFC_INTEGER_8 *status,
  81              gfc_charlen_type path1_len, gfc_charlen_type path2_len)
  82 {
  83   int val = link_internal (path1, path2, path1_len, path2_len);
  84
  85   if (status != NULL)
  86     *status = val;
  87 }
  88 iexport(link_i8_sub);
  89
  90 extern GFC_INTEGER_4 link_i4 (char *, char *, gfc_charlen_type,
  91                               gfc_charlen_type);
  92 export_proto(link_i4);
  93
  94 GFC_INTEGER_4
  95 link_i4 (char *path1, char *path2, gfc_charlen_type path1_len,
  96          gfc_charlen_type path2_len)
  97 {
  98   return link_internal (path1, path2, path1_len, path2_len);
  99 }
 100
 101 extern GFC_INTEGER_8 link_i8 (char *, char *, gfc_charlen_type,
 102                               gfc_charlen_type);
 103 export_proto(link_i8);
 104
 105 GFC_INTEGER_8
 106 link_i8 (char *path1, char *path2, gfc_charlen_type path1_len,
 107          gfc_charlen_type path2_len)
 108 {
 109   return link_internal (path1, path2, path1_len, path2_len);
 110 }
 111 #endif