libgfortran/intrinsics/unlink.c

   1 /* Implementation of the UNLINK intrinsic.
   2    Copyright (C) 2004-2018 Free Software Foundation, Inc.
   3    Contributed by Steven G. Kargl <kargls@comcast.net>.
   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 UNLINK(NAME, STATUS)
  35    CHARACTER(LEN= ), INTENT(IN) :: NAME
  36    INTEGER, INTENT(OUT), OPTIONAL :: STATUS)  */
  37
  38 extern void unlink_i4_sub (char *name, GFC_INTEGER_4 *status,
  39                            gfc_charlen_type name_len);
  40 iexport_proto(unlink_i4_sub);
  41
  42 void
  43 unlink_i4_sub (char *name, GFC_INTEGER_4 *status, gfc_charlen_type name_len)
  44 {
  45   char *str;
  46   GFC_INTEGER_4 stat;
  47
  48   /* Make a null terminated copy of the string.  */
  49   str = fc_strdup (name, name_len);
  50
  51   stat = unlink (str);
  52
  53   free (str);
  54
  55   if (status != NULL)
  56     *status = (stat == 0) ? stat : errno;
  57 }
  58 iexport(unlink_i4_sub);
  59
  60 extern void unlink_i8_sub (char *name, GFC_INTEGER_8 *status,
  61                            gfc_charlen_type name_len);
  62 export_proto(unlink_i8_sub);
  63
  64 void
  65 unlink_i8_sub (char *name, GFC_INTEGER_8 *status, gfc_charlen_type name_len)
  66 {
  67   GFC_INTEGER_4 status4;
  68   unlink_i4_sub (name, &status4, name_len);
  69   if (status)
  70     *status = status4;
  71 }
  72
  73
  74 /* INTEGER FUNCTION UNLINK(NAME)
  75    CHARACTER(LEN= ), INTENT(IN) :: NAME  */
  76
  77 extern GFC_INTEGER_4 PREFIX(unlink) (char *, gfc_charlen_type);
  78 export_proto_np(PREFIX(unlink));
  79
  80 GFC_INTEGER_4
  81 PREFIX(unlink) (char *name, gfc_charlen_type name_len)
  82 {
  83   GFC_INTEGER_4 status;
  84   unlink_i4_sub (name, &status, name_len);
  85   return status;
  86 }