libgfortran/intrinsics/symlnk.c

   1 /* Implementation of the SYMLNK intrinsic.
   2    Copyright (C) 2005-2014 Free Software Foundation, Inc.
   3    Contributed by François-Xavier Coudert <coudert@clipper.ens.fr>
   4
   5 This file is part of the GNU Fortran 95 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 #include <string.h>
  30
  31 #ifdef HAVE_UNISTD_H
  32 #include <unistd.h>
  33 #endif
  34
  35 /* SUBROUTINE SYMLNK(PATH1, PATH2, STATUS)
  36    CHARACTER(len=*), INTENT(IN) :: PATH1, PATH2
  37    INTEGER, INTENT(OUT), OPTIONAL :: STATUS  */
  38
  39 #ifdef HAVE_SYMLINK
  40 extern void symlnk_i4_sub (char *, char *, GFC_INTEGER_4 *, gfc_charlen_type,
  41                          gfc_charlen_type);
  42 iexport_proto(symlnk_i4_sub);
  43
  44 void
  45 symlnk_i4_sub (char *path1, char *path2, GFC_INTEGER_4 *status,
  46              gfc_charlen_type path1_len, gfc_charlen_type path2_len)
  47 {
  48   int val;
  49   char *str1, *str2;
  50
  51   /* Trim trailing spaces from paths.  */
  52   while (path1_len > 0 && path1[path1_len - 1] == ' ')
  53     path1_len--;
  54   while (path2_len > 0 && path2[path2_len - 1] == ' ')
  55     path2_len--;
  56
  57   /* Make a null terminated copy of the strings.  */
  58   str1 = gfc_alloca (path1_len + 1);
  59   memcpy (str1, path1, path1_len);
  60   str1[path1_len] = '\0';
  61
  62   str2 = gfc_alloca (path2_len + 1);
  63   memcpy (str2, path2, path2_len);
  64   str2[path2_len] = '\0';
  65
  66   val = symlink (str1, str2);
  67
  68   if (status != NULL)
  69     *status = (val == 0) ? 0 : errno;
  70 }
  71 iexport(symlnk_i4_sub);
  72
  73 extern void symlnk_i8_sub (char *, char *, GFC_INTEGER_8 *, gfc_charlen_type,
  74                          gfc_charlen_type);
  75 iexport_proto(symlnk_i8_sub);
  76
  77 void
  78 symlnk_i8_sub (char *path1, char *path2, GFC_INTEGER_8 *status,
  79              gfc_charlen_type path1_len, gfc_charlen_type path2_len)
  80 {
  81   int val;
  82   char *str1, *str2;
  83
  84   /* Trim trailing spaces from paths.  */
  85   while (path1_len > 0 && path1[path1_len - 1] == ' ')
  86     path1_len--;
  87   while (path2_len > 0 && path2[path2_len - 1] == ' ')
  88     path2_len--;
  89
  90   /* Make a null terminated copy of the strings.  */
  91   str1 = gfc_alloca (path1_len + 1);
  92   memcpy (str1, path1, path1_len);
  93   str1[path1_len] = '\0';
  94
  95   str2 = gfc_alloca (path2_len + 1);
  96   memcpy (str2, path2, path2_len);
  97   str2[path2_len] = '\0';
  98
  99   val = symlink (str1, str2);
 100
 101   if (status != NULL)
 102     *status = (val == 0) ? 0 : errno;
 103 }
 104 iexport(symlnk_i8_sub);
 105
 106 extern GFC_INTEGER_4 symlnk_i4 (char *, char *, gfc_charlen_type,
 107                               gfc_charlen_type);
 108 export_proto(symlnk_i4);
 109
 110 GFC_INTEGER_4
 111 symlnk_i4 (char *path1, char *path2, gfc_charlen_type path1_len,
 112          gfc_charlen_type path2_len)
 113 {
 114   GFC_INTEGER_4 val;
 115   symlnk_i4_sub (path1, path2, &val, path1_len, path2_len);
 116   return val;
 117 }
 118
 119 extern GFC_INTEGER_8 symlnk_i8 (char *, char *, gfc_charlen_type,
 120                               gfc_charlen_type);
 121 export_proto(symlnk_i8);
 122
 123 GFC_INTEGER_8
 124 symlnk_i8 (char *path1, char *path2, gfc_charlen_type path1_len,
 125          gfc_charlen_type path2_len)
 126 {
 127   GFC_INTEGER_8 val;
 128   symlnk_i8_sub (path1, path2, &val, path1_len, path2_len);
 129   return val;
 130 }
 131 #endif