106 lines
2.3 KiB
C
106 lines
2.3 KiB
C
/*
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* Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation
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* Copyright (C) 1999, 2000 Red Hat, Inc.
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* All rights reserved.
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*
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* This file is part of the Mate Library.
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*
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* The Mate Library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public License as
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* published by the Free Software Foundation; either version 3 of the
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* License, or (at your option) any later version.
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*
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* The Mate Library 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 GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with the Mate Library; see the file COPYING.LIB. If not,
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* write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/*
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@NOTATION@
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*/
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/*
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*
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* Mate utility routines.
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* (C) 1997, 1998, 1999 the Free Software Foundation.
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*
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* Author: Miguel de Icaza,
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*/
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#include <config.h>
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#include "eggshell.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <pwd.h>
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#include <glib.h>
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/**
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* egg_shell:
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* @shell: the value of the SHELL env variable
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*
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* Retrieves the user's preferred shell.
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*
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* Returns: A newly allocated string that is the path to the shell.
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*/
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char *
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egg_shell (const char *shell)
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{
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struct passwd *pw;
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int i;
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static const char shells [][14] =
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{
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/* Note that on some systems shells can also
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* be installed in /usr/bin */
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"/bin/bash", "/usr/bin/bash",
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"/bin/zsh", "/usr/bin/zsh",
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"/bin/tcsh", "/usr/bin/tcsh",
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"/bin/ksh", "/usr/bin/ksh",
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"/bin/csh", "/bin/sh"
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};
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if (geteuid () == getuid () &&
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getegid () == getgid ())
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{
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/* only in non-setuid */
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if (shell != NULL)
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{
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if (access (shell, X_OK) == 0)
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{
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return g_strdup (shell);
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}
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}
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}
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pw = getpwuid(getuid());
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if (pw && pw->pw_shell)
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{
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if (access (pw->pw_shell, X_OK) == 0)
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{
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return g_strdup (pw->pw_shell);
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}
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}
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for (i = 0; i != G_N_ELEMENTS (shells); i++)
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{
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if (access (shells [i], X_OK) == 0)
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{
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return g_strdup (shells[i]);
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}
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}
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/* If /bin/sh doesn't exist, your system is truly broken. */
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g_assert_not_reached ();
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/* Placate compiler. */
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return NULL;
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}
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