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/*
* 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 Gnome Library.
*
* This program 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.
*
* This program 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
@NOTATION@
*/
/*
*
* Gnome utility routines.
* (C) 1997, 1998, 1999 the Free Software Foundation.
*
* Author: Miguel de Icaza,
*/
#include <config.h>
#include "eggshell.hh"
#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 != nullptr) {
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 nullptr;
#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 == nullptr)
retval = g_find_program_in_path ("command.com");
g_assert (retval != nullptr);
return retval;
#endif
}
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