91 lines
2.3 KiB
C
91 lines
2.3 KiB
C
/* Implementation of the ACCESS intrinsic.
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Copyright (C) 2006-2013 Free Software Foundation, Inc.
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Contributed by François-Xavier Coudert <coudert@clipper.ens.fr>
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This file is part of the GNU Fortran 95 runtime library (libgfortran).
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Libgfortran is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public
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License as published by the Free Software Foundation; either
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version 3 of the License, or (at your option) any later version.
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Libgfortran is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "libgfortran.h"
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#include <errno.h>
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#include <string.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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/* INTEGER FUNCTION ACCESS(NAME, MODE)
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CHARACTER(len=*), INTENT(IN) :: NAME, MODE */
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#ifdef HAVE_ACCESS
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extern int access_func (char *, char *, gfc_charlen_type, gfc_charlen_type);
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export_proto(access_func);
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int
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access_func (char *name, char *mode, gfc_charlen_type name_len,
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gfc_charlen_type mode_len)
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{
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char * file;
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gfc_charlen_type i;
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int m;
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/* Parse the MODE string. */
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m = F_OK;
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for (i = 0; i < mode_len && mode[i]; i++)
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switch (mode[i])
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{
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case ' ':
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break;
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case 'r':
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case 'R':
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m |= R_OK;
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break;
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case 'w':
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case 'W':
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m |= W_OK;
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break;
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case 'x':
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case 'X':
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m |= X_OK;
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break;
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default:
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return -1;
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break;
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}
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/* Trim trailing spaces from NAME argument. */
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while (name_len > 0 && name[name_len - 1] == ' ')
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name_len--;
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/* Make a null terminated copy of the string. */
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file = gfc_alloca (name_len + 1);
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memcpy (file, name, name_len);
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file[name_len] = '\0';
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/* And make the call to access(). */
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return (access (file, m) == 0 ? 0 : errno);
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}
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#endif
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