[gnome-commander] Added gnome_cmd_prepend_su_to_vector() function for *su detection

[Piotr Eljasiak <epiotr src gnome org>]

commit 5945a2982e8f84d1fb39921792d0a6aed8eabd37
Author: Piotr Eljasiak <epiotr src gnome org>
Date:   Thu Dec 16 23:05:35 2010 +0100

    Added gnome_cmd_prepend_su_to_vector() function for *su detection

 src/utils.cc |   54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/utils.h  |    2 ++
 2 files changed, 56 insertions(+), 0 deletions(-)
---
diff --git a/src/utils.cc b/src/utils.cc
index c22ecfa..02fd874 100644
--- a/src/utils.cc
+++ b/src/utils.cc
@@ -1354,6 +1354,60 @@ void gnome_cmd_toggle_file_name_selection (GtkWidget *entry)
 }
 
 
+gboolean gnome_cmd_prepend_su_to_vector (int &argc, char **&argv)
+{
+    // sanity
+    if(!argv)
+        argc = 0;
+
+    char *su = NULL;
+    gboolean need_c = FALSE;
+
+    if ((su = g_find_program_in_path ("xdg-su")))
+       goto with_c_param;
+    if ((su = g_find_program_in_path ("gksu")))
+       goto without_c_param;
+    if ((su = g_find_program_in_path ("gnomesu")))
+       goto with_c_param;
+    if ((su = g_find_program_in_path ("beesu")))
+       goto without_c_param;
+    if ((su = g_find_program_in_path ("kdesu")))
+       goto without_c_param;
+
+    return FALSE;
+
+ with_c_param:
+
+   need_c = TRUE;
+
+ without_c_param:
+
+    char **su_argv = g_new0 (char *, 3);
+    int su_argc = 0;
+
+    su_argv[su_argc++] = su;
+    if (need_c)
+        su_argv[su_argc++] = g_strdup("-c");
+
+    // compute size if not given
+    if (argc < 0)
+        for (argc=0; argv[argc]; ++argc);
+
+    int real_argc = su_argc + argc;
+    char **real_argv = g_new0 (char *, real_argc+1);
+
+    g_memmove (real_argv, su_argv, su_argc*sizeof(char *));
+    g_memmove (real_argv+su_argc, argv, argc*sizeof(char *));
+
+    g_free (argv);
+
+    argv = real_argv;
+    argc = real_argc;
+
+    return TRUE;
+}
+
+
 int split(const string &s, vector<string> &coll, const char *sep)
 {
   coll.clear();
diff --git a/src/utils.h b/src/utils.h
index 09acf5f..06178dc 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -259,6 +259,8 @@ gboolean patlist_matches (GList *pattern_list, const gchar *s);
 
 void gnome_cmd_toggle_file_name_selection (GtkWidget *entry);
 
+gboolean gnome_cmd_prepend_su_to_vector (int &argc, char **&argv);
+
 inline void gnome_cmd_show_message (GtkWindow *parent, std::string message, const gchar *secondary_text=NULL)
 {
     GtkWidget *dlg = gtk_message_dialog_new (parent,