libgfortran/intrinsics/symlnk.c

   1 /* Implementation of the SYMLNK intrinsic.
   2    Copyright (C) 2005 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 2 of the License, or (at your option) any later version.
  11
  12 In addition to the permissions in the GNU General Public License, the
  13 Free Software Foundation gives you unlimited permission to link the
  14 compiled version of this file into combinations with other programs,
  15 and to distribute those combinations without any restriction coming
  16 from the use of this file.  (The General Public License restrictions
  17 do apply in other respects; for example, they cover modification of
  18 the file, and distribution when not linked into a combine
  19 executable.)
  20
  21 Libgfortran is distributed in the hope that it will be useful,
  22 but WITHOUT ANY WARRANTY; without even the implied warranty of
  23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24 GNU General Public License for more details.
  25
  26 You should have received a copy of the GNU General Public
  27 License along with libgfortran; see the file COPYING.  If not,
  28 write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  29 Boston, MA 02110-1301, USA.  */
  30
  31 #include "config.h"
  32 #include "libgfortran.h"
  33
  34 #include <errno.h>
  35
  36 #include "../io/io.h"
  37
  38 #ifdef HAVE_STRING_H
  39 #include <string.h>
  40 #endif
  41 #ifdef HAVE_UNISTD_H
  42 #include <unistd.h>
  43 #endif
  44
  45 /* SUBROUTINE SYMLNK(PATH1, PATH2, STATUS)
  46    CHARACTER(len=*), INTENT(IN) :: PATH1, PATH2
  47    INTEGER, INTENT(OUT), OPTIONAL :: STATUS  */
  48
  49 #ifdef HAVE_SYMLINK
  50 extern void symlnk_i4_sub (char *, char *, GFC_INTEGER_4 *, gfc_charlen_type,
  51                          gfc_charlen_type);
  52 iexport_proto(symlnk_i4_sub);
  53
  54 void
  55 symlnk_i4_sub (char *path1, char *path2, GFC_INTEGER_4 *status,
  56              gfc_charlen_type path1_len, gfc_charlen_type path2_len)
  57 {
  58   int val;
  59   char *str1, *str2;
  60
  61   /* Trim trailing spaces from paths.  */
  62   while (path1_len > 0 && path1[path1_len - 1] == ' ')
  63     path1_len--;
  64   while (path2_len > 0 && path2[path2_len - 1] == ' ')
  65     path2_len--;
  66
  67   /* Make a null terminated copy of the strings.  */
  68   str1 = gfc_alloca (path1_len + 1);
  69   memcpy (str1, path1, path1_len);
  70   str1[path1_len] = '\0';
  71
  72   str2 = gfc_alloca (path2_len + 1);
  73   memcpy (str2, path2, path2_len);
  74   str2[path2_len] = '\0';
  75
  76   val = symlink (str1, str2);
  77
  78   if (status != NULL)
  79     *status = (val == 0) ? 0 : errno;
  80 }
  81 iexport(symlnk_i4_sub);
  82
  83 extern void symlnk_i8_sub (char *, char *, GFC_INTEGER_8 *, gfc_charlen_type,
  84                          gfc_charlen_type);
  85 iexport_proto(symlnk_i8_sub);
  86
  87 void
  88 symlnk_i8_sub (char *path1, char *path2, GFC_INTEGER_8 *status,
  89              gfc_charlen_type path1_len, gfc_charlen_type path2_len)
  90 {
  91   int val;
  92   char *str1, *str2;
  93
  94   /* Trim trailing spaces from paths.  */
  95   while (path1_len > 0 && path1[path1_len - 1] == ' ')
  96     path1_len--;
  97   while (path2_len > 0 && path2[path2_len - 1] == ' ')
  98     path2_len--;
  99
 100   /* Make a null terminated copy of the strings.  */
 101   str1 = gfc_alloca (path1_len + 1);
 102   memcpy (str1, path1, path1_len);
 103   str1[path1_len] = '\0';
 104
 105   str2 = gfc_alloca (path2_len + 1);
 106   memcpy (str2, path2, path2_len);
 107   str2[path2_len] = '\0';
 108
 109   val = symlink (str1, str2);
 110
 111   if (status != NULL)
 112     *status = (val == 0) ? 0 : errno;
 113 }
 114 iexport(symlnk_i8_sub);
 115
 116 extern GFC_INTEGER_4 symlnk_i4 (char *, char *, gfc_charlen_type,
 117                               gfc_charlen_type);
 118 export_proto(symlnk_i4);
 119
 120 GFC_INTEGER_4
 121 symlnk_i4 (char *path1, char *path2, gfc_charlen_type path1_len,
 122          gfc_charlen_type path2_len)
 123 {
 124   GFC_INTEGER_4 val;
 125   symlnk_i4_sub (path1, path2, &val, path1_len, path2_len);
 126   return val;
 127 }
 128
 129 extern GFC_INTEGER_8 symlnk_i8 (char *, char *, gfc_charlen_type,
 130                               gfc_charlen_type);
 131 export_proto(symlnk_i8);
 132
 133 GFC_INTEGER_8
 134 symlnk_i8 (char *path1, char *path2, gfc_charlen_type path1_len,
 135          gfc_charlen_type path2_len)
 136 {
 137   GFC_INTEGER_8 val;
 138   symlnk_i8_sub (path1, path2, &val, path1_len, path2_len);
 139   return val;
 140 }
 141 #endif