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      1 /* Implementation of the LINK intrinsic.
      2    Copyright (C) 2005-2022 Free Software Foundation, Inc.
      3    Contributed by Franois-Xavier Coudert <coudert (at) 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
    112