| /* Implementation of the GETCWD intrinsic. |
| Copyright (C) 2004-2024 Free Software Foundation, Inc. |
| Contributed by Steven G. Kargl <kargls@comcast.net>. |
| |
| This file is part of the GNU Fortran 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 <string.h> |
| #include <errno.h> |
| |
| #ifdef HAVE_UNISTD_H |
| #include <unistd.h> |
| #endif |
| |
| #ifdef HAVE_GETCWD |
| |
| extern void getcwd_i4_sub (char *, GFC_INTEGER_4 *, gfc_charlen_type); |
| iexport_proto(getcwd_i4_sub); |
| |
| void |
| getcwd_i4_sub (char *cwd, GFC_INTEGER_4 *status, gfc_charlen_type cwd_len) |
| { |
| int err; |
| |
| if (getcwd (cwd, cwd_len)) |
| { |
| size_t len = strlen (cwd); |
| memset (cwd + len, ' ', cwd_len - len); |
| err = 0; |
| } |
| else if (errno == ERANGE) |
| { |
| /* There is a possibility that the previous attempt failed due |
| to not enough space for the terminating null byte. Try again |
| with a buffer one char longer. */ |
| char *buf = xmalloc (cwd_len + 1); |
| if (getcwd (buf, cwd_len + 1)) |
| { |
| memcpy (cwd, buf, cwd_len); |
| err = 0; |
| } |
| else |
| err = errno; |
| free (buf); |
| } |
| else |
| err = errno; |
| if (err) |
| memset (cwd, ' ', cwd_len); |
| if (status != NULL) |
| *status = err; |
| } |
| iexport(getcwd_i4_sub); |
| |
| extern void getcwd_i8_sub (char *, GFC_INTEGER_8 *, gfc_charlen_type); |
| export_proto(getcwd_i8_sub); |
| |
| void |
| getcwd_i8_sub (char *cwd, GFC_INTEGER_8 *status, gfc_charlen_type cwd_len) |
| { |
| GFC_INTEGER_4 status4; |
| getcwd_i4_sub (cwd, &status4, cwd_len); |
| if (status) |
| *status = status4; |
| } |
| |
| extern GFC_INTEGER_4 PREFIX(getcwd) (char *, gfc_charlen_type); |
| export_proto_np(PREFIX(getcwd)); |
| |
| GFC_INTEGER_4 |
| PREFIX(getcwd) (char *cwd, gfc_charlen_type cwd_len) |
| { |
| GFC_INTEGER_4 status; |
| getcwd_i4_sub (cwd, &status, cwd_len); |
| return status; |
| } |
| |
| #endif |