122 lines
3.1 KiB
C
122 lines
3.1 KiB
C
/* Implementation of the GETLOG g77 intrinsic.
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Copyright (C) 2005-2017 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 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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#ifdef HAVE_UNISTD_H
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# if defined __MINGW32__ && defined HAVE_GETLOGIN
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# define _POSIX 1
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# endif
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#include <unistd.h>
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#endif
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#ifdef HAVE_PWD_H
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#include <pwd.h>
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#endif
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/* Windows32 version */
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#if defined __MINGW32__ && !defined HAVE_GETLOGIN
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#include <lmcons.h> /* for UNLEN */
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static char *
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w32_getlogin (void)
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{
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static char name [UNLEN + 1];
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DWORD namelen = sizeof (name);
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GetUserName (name, &namelen);
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return (name[0] == 0 ? NULL : name);
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}
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#undef getlogin
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#define getlogin w32_getlogin
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#define HAVE_GETLOGIN 1
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#endif
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/* GETLOG (LOGIN), g77 intrinsic for retrieving the login name for the
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process.
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CHARACTER(len=*), INTENT(OUT) :: LOGIN */
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void PREFIX(getlog) (char *, gfc_charlen_type);
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export_proto_np(PREFIX(getlog));
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void
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PREFIX(getlog) (char * login, gfc_charlen_type login_len)
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{
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int p_len;
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char *p;
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memset (login, ' ', login_len); /* Blank the string. */
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#if defined(HAVE_POSIX_GETPWUID_R) && defined(HAVE_GETEUID)
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struct passwd pwd;
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struct passwd *result;
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char *buf;
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int err;
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/* To be pedantic, buflen should be determined by
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sysconf(_SC_GETPW_R_SIZE_MAX), which is 1024 on some tested
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targets; we do something simple in case the target doesn't
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support sysconf. */
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static const size_t buflen = 1024;
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buf = xmalloc (buflen);
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err = getpwuid_r (geteuid (), &pwd, buf, buflen, &result);
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if (err != 0 || result == NULL)
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goto cleanup;
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p = pwd.pw_name;
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#elif defined(HAVE_GETPWUID) && defined(HAVE_GETEUID)
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{
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struct passwd *pw = getpwuid (geteuid ());
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if (pw)
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p = pw->pw_name;
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else
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return;
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}
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#elif HAVE_GETLOGIN
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p = getlogin();
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# else
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return;
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#endif
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if (p == NULL)
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goto cleanup;
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p_len = strlen (p);
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if (login_len < p_len)
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p_len = login_len;
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memcpy (login, p, p_len);
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cleanup:
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#if defined (HAVE_POSIX_GETPWUID_R) && defined(HAVE_GETEUID)
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free (buf);
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#else
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;
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#endif
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}
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