/* * Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation * Copyright (C) 1999, 2000 Red Hat, Inc. * All rights reserved. * * This file is part of the Mate Library. * * The Mate Library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public License as * published by the Free Software Foundation; either version 3 of the * License, or (at your option) any later version. * * The Mate Library 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 * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with the Mate Library; see the file COPYING.LIB. If not, * write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ /* @NOTATION@ */ /* * * Mate utility routines. * (C) 1997, 1998, 1999 the Free Software Foundation. * * Author: Miguel de Icaza, */ #include <config.h> #include "eggshell.h" #include <stdlib.h> #include <stdio.h> #include <string.h> #include <unistd.h> #ifndef G_OS_WIN32 #include <pwd.h> #endif #include <glib.h> /** * egg_shell: * @shell: the value of the SHELL env variable * * Retrieves the user's preferred shell. * * Returns: A newly allocated string that is the path to the shell. */ char * egg_shell (const char *shell) { #ifndef G_OS_WIN32 struct passwd *pw; int i; static const char shells [][14] = { /* Note that on some systems shells can also * be installed in /usr/bin */ "/bin/bash", "/usr/bin/bash", "/bin/zsh", "/usr/bin/zsh", "/bin/tcsh", "/usr/bin/tcsh", "/bin/ksh", "/usr/bin/ksh", "/bin/csh", "/bin/sh" }; if (geteuid () == getuid () && getegid () == getgid ()) { /* only in non-setuid */ if (shell != NULL) { if (access (shell, X_OK) == 0) { return g_strdup (shell); } } } pw = getpwuid(getuid()); if (pw && pw->pw_shell) { if (access (pw->pw_shell, X_OK) == 0) { return g_strdup (pw->pw_shell); } } for (i = 0; i != G_N_ELEMENTS (shells); i++) { if (access (shells [i], X_OK) == 0) { return g_strdup (shells[i]); } } /* If /bin/sh doesn't exist, your system is truly broken. */ g_assert_not_reached (); /* Placate compiler. */ return NULL; #else /* g_find_program_in_path() always looks also in the Windows * and System32 directories, so it should always find either cmd.exe * or command.com. */ char *retval = g_find_program_in_path ("cmd.exe"); if (retval == NULL) retval = g_find_program_in_path ("command.com"); g_assert (retval != NULL); return retval; #endif }