1 files changed, 121 insertions, 0 deletions
diff --git a/libgfortran/intrinsics/getlog.c b/libgfortran/intrinsics/getlog.c
new file mode 100644
index 0000000000..a856cd1eee
--- /dev/null
+++ b/libgfortran/intrinsics/getlog.c
@@ -0,0 +1,121 @@
+/* Implementation of the GETLOG g77 intrinsic.
+   Copyright (C) 2005-2017 Free Software Foundation, Inc.
+   Contributed by François-Xavier Coudert <coudert@clipper.ens.fr>
+
+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>
+
+#ifdef HAVE_UNISTD_H
+#  if defined __MINGW32__ && defined  HAVE_GETLOGIN
+#    define _POSIX 1
+#  endif
+#include <unistd.h>
+#endif
+#ifdef HAVE_PWD_H
+#include <pwd.h>
+#endif
+
+/* Windows32 version */
+#if defined __MINGW32__ && !defined  HAVE_GETLOGIN
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <lmcons.h>  /* for UNLEN */ 
+
+static char *
+w32_getlogin (void)
+{
+  static char name [UNLEN + 1];
+  DWORD namelen = sizeof (name);
+
+  GetUserName (name, &namelen);
+  return (name[0] == 0 ?  NULL : name);
+}
+
+#undef getlogin
+#define getlogin w32_getlogin
+#define HAVE_GETLOGIN 1
+
+#endif
+
+
+/* GETLOG (LOGIN), g77 intrinsic for retrieving the login name for the
+   process.
+   CHARACTER(len=*), INTENT(OUT) :: LOGIN  */
+
+void PREFIX(getlog) (char *, gfc_charlen_type);
+export_proto_np(PREFIX(getlog));
+
+void
+PREFIX(getlog) (char * login, gfc_charlen_type login_len)
+{
+  int p_len;
+  char *p;
+
+  memset (login, ' ', login_len); /* Blank the string.  */
+
+#if defined(HAVE_POSIX_GETPWUID_R) && defined(HAVE_GETEUID)
+  struct passwd pwd;
+  struct passwd *result;
+  char *buf;
+  int err;
+  /* To be pedantic, buflen should be determined by
+     sysconf(_SC_GETPW_R_SIZE_MAX), which is 1024 on some tested
+     targets; we do something simple in case the target doesn't
+     support sysconf.  */
+  static const size_t buflen = 1024;
+  buf = xmalloc (buflen);
+  err = getpwuid_r (geteuid (), &pwd, buf, buflen, &result);
+  if (err != 0 || result == NULL)
+    goto cleanup;
+  p = pwd.pw_name;
+#elif defined(HAVE_GETPWUID) && defined(HAVE_GETEUID)
+  {
+    struct passwd *pw = getpwuid (geteuid ());
+    if (pw)
+      p = pw->pw_name;
+    else
+      return;
+  }
+#elif HAVE_GETLOGIN
+  p = getlogin();
+# else
+  return;
+#endif
+
+  if (p == NULL)
+    goto cleanup;
+
+  p_len = strlen (p);
+  if (login_len < p_len)
+    p_len = login_len;
+  memcpy (login, p, p_len);
+
+ cleanup:
+#if defined (HAVE_POSIX_GETPWUID_R) && defined(HAVE_GETEUID)
+  free (buf);
+#else
+  ;
+#endif
+}