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/* Implementation of the ACCESS intrinsic.
Copyright (C) 2006, 2007, 2009 Free Software Foundation, Inc.
Contributed by François-Xavier Coudert <coudert@clipper.ens.fr>
This file is part of the GNU Fortran 95 runtime library (libgfortran).
Libgfortran is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
Libgfortran is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include "libgfortran.h"
#include <errno.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
/* INTEGER FUNCTION ACCESS(NAME, MODE)
CHARACTER(len=*), INTENT(IN) :: NAME, MODE */
#ifdef HAVE_ACCESS
extern int access_func (char *, char *, gfc_charlen_type, gfc_charlen_type);
export_proto(access_func);
int
access_func (char *name, char *mode, gfc_charlen_type name_len,
gfc_charlen_type mode_len)
{
char * file;
gfc_charlen_type i;
int m;
/* Parse the MODE string. */
m = F_OK;
for (i = 0; i < mode_len && mode[i]; i++)
switch (mode[i])
{
case ' ':
break;
case 'r':
case 'R':
m |= R_OK;
break;
case 'w':
case 'W':
m |= W_OK;
break;
case 'x':
case 'X':
m |= X_OK;
break;
default:
return -1;
break;
}
/* Trim trailing spaces from NAME argument. */
while (name_len > 0 && name[name_len - 1] == ' ')
name_len--;
/* Make a null terminated copy of the string. */
file = gfc_alloca (name_len + 1);
memcpy (file, name, name_len);
file[name_len] = '\0';
/* And make the call to access(). */
return (access (file, m) == 0 ? 0 : errno);
}
#endif
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