1 files changed, 112 insertions, 0 deletions
diff --git a/src/eggshell.cc b/src/eggshell.cc
new file mode 100644
index 0000000..b0926eb
--- /dev/null
+++ b/src/eggshell.cc
@@ -0,0 +1,112 @@
+/*
+ * 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
+}