99 lines
2.6 KiB
C
99 lines
2.6 KiB
C
/* Implementation of the GETCWD intrinsic.
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Copyright (C) 2004-2017 Free Software Foundation, Inc.
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Contributed by Steven G. Kargl <kargls@comcast.net>.
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This file is part of the GNU Fortran 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 <string.h>
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#include <errno.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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#ifdef HAVE_GETCWD
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extern void getcwd_i4_sub (char *, GFC_INTEGER_4 *, gfc_charlen_type);
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iexport_proto(getcwd_i4_sub);
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void
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getcwd_i4_sub (char *cwd, GFC_INTEGER_4 *status, gfc_charlen_type cwd_len)
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{
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int err;
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if (getcwd (cwd, cwd_len))
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{
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size_t len = strlen (cwd);
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memset (cwd + len, ' ', cwd_len - len);
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err = 0;
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}
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else if (errno == ERANGE)
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{
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/* There is a possibility that the previous attempt failed due
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to not enough space for the terminating null byte. Try again
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with a buffer one char longer. */
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char *buf = xmalloc (cwd_len + 1);
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if (getcwd (buf, cwd_len + 1))
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{
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memcpy (cwd, buf, cwd_len);
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err = 0;
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}
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else
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err = errno;
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free (buf);
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}
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else
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err = errno;
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if (err)
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memset (cwd, ' ', cwd_len);
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if (status != NULL)
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*status = err;
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}
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iexport(getcwd_i4_sub);
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extern void getcwd_i8_sub (char *, GFC_INTEGER_8 *, gfc_charlen_type);
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export_proto(getcwd_i8_sub);
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void
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getcwd_i8_sub (char *cwd, GFC_INTEGER_8 *status, gfc_charlen_type cwd_len)
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{
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GFC_INTEGER_4 status4;
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getcwd_i4_sub (cwd, &status4, cwd_len);
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if (status)
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*status = status4;
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}
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extern GFC_INTEGER_4 PREFIX(getcwd) (char *, gfc_charlen_type);
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export_proto_np(PREFIX(getcwd));
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GFC_INTEGER_4
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PREFIX(getcwd) (char *cwd, gfc_charlen_type cwd_len)
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{
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GFC_INTEGER_4 status;
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getcwd_i4_sub (cwd, &status, cwd_len);
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return status;
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}
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#endif
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