exception handling when a session subprocess is interrupted (f.e. ctr+c on password entry)

Fix escape sequence

See merge request zlax/sshch!2

LICENSE

@@ -4,27 +4,26 @@ sshch is released under the DWTW license
 
 This program is free software; you can redistribute it and/or modify it under the terms of the Do What Thou Wilt License.
 
-DO WHAT THAU WILT
+Boundless Public License
+DO WHAT THOU WILT
 TO PUBLIC LICENSE
 
-Version 2.5
+Version 2.55
 
-Everyone is permitted to copy and distribute verbatim or modified copies of this license document, and changing it is allowed as long as the name is changed.
+Everyone is permitted to copy and distribute verbatim or modified copies of this license document, and changing it in full or in part is allowed without any restrictions.
 
 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
 
 0. Do what thou wilt shall be the whole of the Law.
 
-Anyone is allowed to copy and distribute the copies of this license agreement in whole or in part, as well as modify it without any other limitations. 
+DWTWL – a license with a single requirement: DO WHAT THOU WILT
-
-DWTW – a license with a single requirement: DO WHAT THOU WILT 
 
 The license provides more freedom than any other one (such as GPL or BSD) and does not require saving the license text on copying.
 
-DWTW – an accomplished and eligible license for free text (including the software, documentation and artwork). 
+DWTWL – an accomplished and eligible license for free text, code and any other symbols (including the software, documentation and artwork).
 
-The license does not contain "no warranty" clause. DWTW can be used in countries that do not legally acknowledge the transition to public domain. 
+The license does not contain a "no warranty" clause. DWTWL can be used in countries that do not legally acknowledge the transition to public domain.
 
 Summary:
 
-An author-creator gives his or her source code to the world for free, without becoming distracted by worldly thinking regarding how and why the others will use it.
+An author-creator gives their source code to the world for free, without becoming distracted by worldly thinking regarding how and why the others will use it.

README.md

@@ -1,25 +1,49 @@
-SSH connection manager with curses interface
+SSH connection and aliases manager with curses and command line interface
 ======
-sshch is released under DWTWL 2.5 license
+sshch is released under DWTWL 2.55 license
+
+sshch compatible with pyhon2 and python3, no additional libraries are required
 ### Screenshot
-![sshch](https://raw.githubusercontent.com/zlaxy/sshch/master/sshch_screenshot.png)
+![sshch](https://dev.ussr.win/zlax/sshch/raw/branch/master/sshch_screenshot.png)
+
 ### Installing
-To install for all users:
+**You can install a release version from pip:**
+```bash
+pip install sshch
 ```
+**Manual installation from the package or git repository also available:**
+
+To install for all users:
+```bash
 sudo python setup.py install
 ```
 To install just for current user:
-```
+```bash
 mkdir ~/.local/bin
 cp sshch/sshch ~/.local/bin/
 ```
 ### Using
 To run curses interface:
-```
+```bash
 sshch
 ```
 To run command line help:
-```
+```bash
 sshch -h
 ```
-**If you want to use unsafe 'password' feature you must install 'sshpass' first.**
+For exit from current ssh session press `Ctrl+D`.
+
+**Additional Features**
+- If you want to use unsafe 'password' feature you must install `sshpass` first.
+- If you want to use bash autocompletion function with sshch, copy autocompletion script to /etc/bash_completion.d/:
+```bash
+sudo cp completion/sshch_bash_completion.sh /etc/bash_completion.d/sshch
+```
+(changes will come into effect with new bash session)
+- If you want to use zsh autocompletion:
+1) Place File in a Directory where ZSH can find it
+
+     -> Search Path is Stored in $fpath
+
+     -> echo $fpath
+2) Rename File to '_sshch'

completion/sshch_bash_completion.sh

@@ -0,0 +1,11 @@
+_sshch_complete()
+{
+        local cur_word alias_list
+        cur_word="${COMP_WORDS[COMP_CWORD]}"
+        alias_list=`sshch -l`
+        COMPREPLY=($(compgen -W "$alias_list" -- $cur_word))
+        return 0
+}
+
+complete -F _sshch_complete sshch
+

completion/sshch_zsh_completion.sh

@@ -0,0 +1,27 @@
+#compdef sshch
+#
+# ZSH Completion for SSHCH
+# Usage:
+#  1) Place File in a Directory where ZSH can find it
+#     -> Search Path is Stored in $fpath
+#     -> echo $fpath
+#  2) Rename File to '_sshch'
+#
+_arguments '::aliasname:->getAlias' \
+	   '-e[Edit Alias]:aliasname:->getAlias' '--edit[Edit Alias]:aliasname:->getAlias' \
+	   '-p[Set Password]:aliasname:->getAlias' '--password[Set Password]:aliasname:->getAlias' \
+	   '-r[Remove Alias]:aliasname:->getAlias' '--remove[Remove Alias]:aliasname:->getAlias' \
+	   '-k[Keep Connection]:aliasname:->getAlias' '--keep[Keep Connection]:aliasname:->getAlias' \
+           '-a[Add Alias]'     '--add[Add Alias]'\
+           '-c[Add Command for Executing Alias]'     '--command[Add Command for Executing Alias]'\
+           '-h[Show Help Message]'     '--help[Show Help Message]'\
+           '-l[List Existing Alias]' '--list[List Existing Alias]'\
+           '-f[List Existing Alias with Connection String]' '--fulllist[List Existing Alias with Connection String]'\
+           '--version[Show Program Version]'
+case "$state" in
+    getAlias)
+        local -a alias_list
+        alias_list=($(sshch -l))
+	_values -s ' '  'Aliases' $alias_list
+        ;;
+esac

setup.py

@@ -7,22 +7,27 @@ def main():
 
     setup(name='sshch',
           author='zlaxy',
-          url='https://github.com/zlaxy/sshch/',
+          author_email='zlaxyi@gmail.com',
-          description='Ssh connection manager',
+          url='https://gitlab.com/zlax/sshch',
-          license='DWTWL 2.5',
+          description='Ssh connection and aliases manager',
-          version='0.55',
+          long_description='SSH connection and aliases manager with curses and command line interface',
+          long_description_content_type='text/x-rst',
+          license='DWTWL 2.55',
+          version='1.09.7',
           py_modules=['sshch'],
           scripts=['sshch/sshch'],
+          keywords='sshch ssh aliases curses manager',
+          python_requires='>=2.6, !=3.0.*, !=3.1.*, !=3.2.*, <4',
 
           # http://pypi.python.org/pypi?%3Aaction=list_classifiers
           classifiers=[
-              'Development Status :: 4 - Beta',
+              'Development Status :: 5 - Production/Stable',
               'Environment :: Console :: Curses',
               'Intended Audience :: System Administrators',
               'License :: Freeware',
               'Natural Language :: English',
               'Operating System :: POSIX',
-              'Programming Language :: Python :: 2.7',
+              'Programming Language :: Python',
               'Topic :: Internet',
               'Topic :: System :: Networking',
               'Topic :: System :: Systems Administration',

sshch/sshch

@@ -2,21 +2,41 @@
 # -*- coding: utf-8 -*-
 
 from __future__ import division
+from __future__ import print_function
+try:
+    import configparser
+except ImportError:
+    import ConfigParser as configparser  # Python 2.x import
+    import locale
+    locale.setlocale(locale.LC_ALL, '')
 from os import path
 from sys import argv
 from math import ceil
 from getpass import getpass
 from optparse import OptionParser
-from curses import textpad
-import ConfigParser
 import subprocess
 import base64
+import time
 import curses
+from curses import textpad, panel
+from threading import Thread
 
-# https://github.com/zlaxy/sshch
+# https://gitlab.com/zlax/sshch
-version = "0.55"
+version = "1.09.7"
-# path to conf file, default: ~/.config/sshch.conf
+# expand groups by default
-conf_file = path.expanduser("~") + '/.config/sshch.conf'
+expand_default = True
+# path to conf dir and file, default: ~/.config/sshch.conf
+conf_dir = path.expanduser("~") + '/.config'
+conf_file = conf_dir + '/' + 'sshch.conf'
+
+
+class GroupTree(object):
+    """Group object with relatives information"""
+    def __init__(self, group):
+        self.group = group
+        self.aliases = []
+        self.children = []
+        self.parent = []
 
 
 def AddNewAlias(alias):
@@ -25,7 +45,7 @@ def AddNewAlias(alias):
         conf.write(open(conf_file, "w"))
         return True
     else:
-        return "error: '" + alias + "' already exists"
+        return "error: '" + alias + "' alias or group already exists"
 
 
 def SetAliasString(alias, string):
@@ -33,9 +53,19 @@ def SetAliasString(alias, string):
     conf.write(open(conf_file, "w"))
 
 
+def SetGroupString(alias, string):
+    conf.set(alias, "group", string)
+    conf.write(open(conf_file, "w"))
+
+
 def SetPassword(alias, string):
+    if string == "" or string == b'':
+        conf.remove_option(alias, "password")
+    else:
+        string = string.encode()
         string = base64.b64encode(base64.b16encode(
                                   base64.b32encode(string)))
+        string = string.decode('utf-8')
         conf.set(alias, "password", string)
     conf.write(open(conf_file, "w"))
 
@@ -46,107 +76,303 @@ def RemoveAliases(aliases):
         conf.write(open(conf_file, "w"))
 
 
-def ConnectAlias(alias, command=False):
+def ConvertPassword(password):
-    print "Connecting to " + alias + "..."
+    password_string = "'"
+    for char in password:
+        if char == "'":
+            password_string += "'"+'"'+"'"+'"'+"'"
+        elif char == '"':
+            password_string += "''"+'"'+"''"
+        elif char == ';':
+            password_string += "'"+r'\;'+"'"
+        elif char == "\\":
+            password_string += "'"+'"'+"\\"+"\\"+'"'+"'"
+        else:
+            password_string += char
+    password_string += "'"
+    return password_string
+
+
+def Connect(aliases, command=False, threading=False, screen=False):
+    if screen:
+        curses.endwin()
+    groups = []
+    connectaliases = []
+    for a in conf.sections():
+        if conf.has_option(a, "group"):
+            groups.append(a)
+    for alias in aliases:
+        if alias in groups:
+            group_aliases = GroupChildAliases(alias)
+            for ga in group_aliases:
+                connectaliases.append(ga)
+        else:
+            connectaliases.append(alias)
+    connectaliases = setSeq(connectaliases)
+    threads = {}
+    for alias in connectaliases:
+        if conf.has_section(alias):
+            print("Connecting to " + alias + "...")
+            if threading:
+                threads[alias] = Thread(target=ConnectAlias, args=(alias,
+                                        command, True))
+                threads[alias].start()
+            else:
+                ConnectAlias(alias, command)
+            if not threading:
+                print("... " + alias + " session finished.")
+        else:
+            print("error: '" + alias + "' alias does not exists")
+    if screen:
+        print("Press 'enter' to continue.")
+        screen.getch()
+
+
+def ConnectAlias(alias, command=False, threading=False):
     exec_string = ""
     if conf.has_option(alias, "password"):
         password = base64.b32decode(base64.b16decode(
                                     base64.b64decode(conf.get(alias, "password"))))
-        exec_string = "sshpass -p " + password + " "
+        exec_string = "sshpass -p " + ConvertPassword(password.decode('utf-8')) + " "
+    if conf.has_option(alias, "exec_string"):
         exec_string = exec_string + conf.get(alias, "exec_string")
     if command:
         exec_string = exec_string + " " + command
-    # Variables bellow is newer used
+    try:
-    subprocess.Popen(exec_string, shell=True)
+        subprocess.Popen(exec_string, shell=True).communicate()[0]
-    # p.communicate()[0]
+    except:
-    print "... " + alias + " session finished."
+        pass
+    if threading:
+        print ("... "+alias+" session output finished.")
+
+
+def HoldConnection(alias):
+    groups = []
+    connectaliases = []
+    for a in conf.sections():
+        if conf.has_option(a, "group"):
+            groups.append(a)
+    if alias in groups:
+        print("Can't hold connection with group.")
+    else:
+        print("Connecting to " + alias + ". Press CTRL+C to cancel.")
+        time.sleep(1)
+        while True:
+            ConnectAlias(alias)
+            time.sleep(5)
 
 
 def CMDAdd(alias):
+    alias = alias.split()[0].strip()
     result = AddNewAlias(alias)
-    if result:
+    if result == True:
         prompt_add = ("".join(["Enter connection string for new alias ",
                                "(example: ssh user@somehost.com):\n"]))
         string = ""
         while string == "":
-            string = raw_input(prompt_add)
+            string = input(prompt_add)
         SetAliasString(alias, string)
     else:
-        print result
+        print(result)
+
+
+def CMDGroup(group):
+    group = group.split()[0].strip()
+    result = AddNewAlias(group)
+    if result == True:
+        prompt_add = ("".join(["Enter aliases for new group ",
+                               "(example: alias1 alias2):\n"]))
+        string = ""
+        while string == "":
+            string = input(prompt_add)
+        SetGroupString(group, string)
+    else:
+        print(result)
 
 
 def CMDEdit(alias):
     if conf.has_section(alias):
-        prompt_edit = ("".join(["Enter connection string for existing alias ",
+        if conf.has_option(alias, "exec_string"):
-                       "(example: ssh user@somehost.com):\n"]))
+            prompt_edit = ("".join(["Enter connection string for existing ",
+                           "alias (example: ssh user@somehost.com):\n"]))
             string = ""
             while string == "":
-            string = raw_input(prompt_edit)
+                string = input(prompt_edit)
             SetAliasString(alias, string)
+        elif conf.has_option(alias, "group"):
+            prompt_edit = ("".join(["Enter aliases for existing group ",
+                           "(example: alias1 alias2):\n"]))
+            string = ""
+            while string == "":
+                string = input(prompt_edit)
+            SetGroupString(alias, string)
         else:
-        print "error: '" + alias + "' alias is not exists"
+            print("error: '" + alias + "' is not correct alias or group")
+    else:
+        print("error: '" + alias + "' alias or group does not exists")
 
 
 def CMDPassword(alias):
+    groups = []
+    connectaliases = []
+    for a in conf.sections():
+        if conf.has_option(a, "group"):
+            groups.append(a)
+    if alias in groups:
+        print("Can't set password for group.")
+    else:
         if conf.has_section(alias):
-        prompt_pass = ("[UNSAFE] Enter password for sshpass: ")
+            prompt_pass = ("[UNSAFE] Enter password for sshpass (Ctrl+C" +
+                            " - cancel, blank - clear password):\n")
             string = ""
             string = getpass(prompt_pass)
-        if not string == "":
             SetPassword(alias, string)
         else:
-        print "error: '" + alias + "' alias is not exists"
+            print("error: '" + alias + "' alias does not exists")
 
 
 def CMDRemove(alias):
     if conf.has_section(alias):
-        prompt_remove = ("Type 'yes' if you sure to remove '" + alias + "' alias: ")
+        prompt_remove = ("Type 'yes' if you sure to remove '" + alias +
-        string = raw_input(prompt_remove)
+                         "' alias or group: ")
+        string = input(prompt_remove)
         if string == "yes":
             RemoveAliases([alias])
         else:
-            print "'" + alias + "' alias was not deleted."
+            print("'" + alias + "' alias or group was not deleted.")
     else:
-        print "error: '" + alias + "' alias is not exists."
+        print("error: '" + alias + "' alias or group does not exists.")
-
-
-def CMDConnect(aliases, command=False):
-    for alias in aliases:
-        if conf.has_section(alias):
-            ConnectAlias(alias, command)
-        else:
-            print "error: '" + alias + "' alias is not exists"
 
 
 def CMDList(option, opt, value, parser):
-    print ', '.join(str(p) for p in conf.sections())
+    print(' '.join(str(p) for p in conf.sections()))
+
+
+def setSeq(seq):
+    # py2&3 fastest way to remove duplicates from a list:
+    # https://www.rupython.com/x432-4-496.html
+    seen = set()
+    seen_add = seen.add
+    return [x for x in seq if not (x in seen or seen_add(x))]
+
+
+def GroupChildRecursion(group, childaliases, treelist):
+    if treelist[group].children:
+        for a in treelist[group].children:
+            GroupChildRecursion(a, childaliases, treelist)
+    if treelist[group].aliases:
+        for a in treelist[group].aliases:
+            childaliases.append(a)
+    return childaliases
+
+
+def GroupChildAliases(group):
+    aliases = []
+    groups = []
+    rootgroups = []
+    treelist = {}
+    for a in conf.sections():
+        if conf.has_option(a, "group"):
+            groups.append(a)
+        elif conf.has_option(a, "exec_string"):
+            aliases.append(a)
+    rootaliases = list(aliases)
+    for g in groups:
+        treelist[g] = GroupTree(g)
+        group_aliases = conf.get(g, "group").split()
+        for ga in group_aliases:
+            if ga in groups:
+                treelist[g].children.append(ga)
+            elif ga in aliases:
+                treelist[g].aliases.append(ga)
+                try:
+                    rootaliases.remove(ga)
+                except ValueError:
+                    pass
+    for g in groups:
+        if treelist[g].children:
+            for child in treelist[g].children:
+                treelist[child].parent.append(g)
+    for g in groups:
+        if not treelist[g].parent:
+            rootgroups.append(g)
+    if group == False:
+        return aliases, groups, rootaliases, rootgroups, treelist
+    else:
+        childaliases = GroupChildRecursion(group, [], treelist)
+        return setSeq(childaliases)
+
+
+def GroupTreeRecursion(level, group, treelist, resultalias, resultstring,
+                        expandlist, previousgroups):
+    if group in previousgroups:
+        return resultalias, resultstring
+    previousgroups.append(group)
+    resultalias.append(group)
+    if expandlist == True or group in expandlist:
+        resultstring.append('  '*(level-1)+">> "+group)
+        for g in treelist[group].children:
+            resultalias, resultstring = GroupTreeRecursion(level+1, g,
+                    treelist, resultalias, resultstring, expandlist, previousgroups)
+        for ga in treelist[group].aliases:
+            if conf.has_option(ga, "exec_string"):
+                resultalias.append(ga)
+                result = "".join(['  '*(level-1)+" ~ ", str(ga), " (",
+                        (conf.get(ga, "exec_string") if conf.has_option(ga,
+                        "exec_string") else ""), ")",
+                        (" [password]" if conf.has_option(ga, "password") else "")])
+                resultstring.append(result)
+    else:
+        resultstring.append('  '*(level-1)+"<> "+group)
+    return resultalias, resultstring
+
+
+def GetTreeList(strings=True, expandlist=True):
+    resultalias = []
+    resultstring = []
+    aliases, groups, rootaliases, rootgroups, treelist = GroupChildAliases(False)
+    for g in rootgroups:
+        resultalias, resultstring = GroupTreeRecursion(1, g, treelist,
+                resultalias, resultstring, expandlist, [])
+    for a in rootaliases:
+        resultalias.append(a)
+        result = "".join([str(a), " (", (conf.get(a, "exec_string") if
+                conf.has_option(a, "exec_string") else ""), ")",
+                (" [password]" if conf.has_option(a, "password") else "")])
+        resultstring.append(result)
+    if strings:
+        return resultstring
+    else:
+        return resultalias
 
 
 def CMDFullList(option, opt, value, parser):
-    for p in conf.sections():
+    for p in GetTreeList():
-        to_print = "".join([str(p), " - ", conf.get(p, "exec_string"),
+        print (p)
-                            (" [password]" if conf.has_option(p, "password") else ""), "\n"])
-        print(to_print)
-
-
-def CursesConnect(screen, aliases, command=False):
-    curses.endwin()
-    for alias in aliases:
-        ConnectAlias(alias, command)
-    print "Press 'enter' to continue."
-    screen.getch()
 
 
 def CursesExit(error=False):
     curses.endwin()
     if error:
-        print error
+        print(error)
     exit()
 
 
+class CursesTextpadEsc(Exception):
+    "ESC key has been pressed"
+
+
 def CursesTextpadConfirm(value):
-    if value == 10:
+    if value == 10:                 # Enter
         value = 7
+    elif value == 27:               # Esc
+        raise CursesTextpadEsc()
+    elif value == curses.KEY_DC:    # Del
+        value = curses.ascii.EOT
+    elif value == curses.KEY_HOME:  # Home
+        value = curses.ascii.SOH
+    elif value == curses.KEY_END:   # End
+        value = curses.ascii.ENQ
     return value
 
 
@@ -176,7 +402,7 @@ def CursesPanel(screen, h, w, y, x, text,
     new_window.attroff(deco_colorpair)
     sub_window = new_window.subwin(h - 2, w - 2, y + 1, x + 1)
     sub_window.insstr(0, 0, text)
-    curses.panel.new_panel(new_window)
+    panel = curses.panel.new_panel(new_window)
     curses.panel.update_panels()
     screen.refresh()
     if confirm == "password":
@@ -199,7 +425,7 @@ def CursesPanel(screen, h, w, y, x, text,
                         position = position - 1
                     hidden_password = hidden_password[0:-1]
             if keych > 31 and keych < 127:
-                hidden_password += curses.keyname(keych)
+                hidden_password += curses.keyname(keych).decode('utf-8')
                 sub_window.addstr(1, position, "*", text_colorpair)
                 if position < w - 4:
                     position += 1
@@ -219,6 +445,7 @@ def CMDOptions():
 
         def format_epilog(self, formatter):
             return self.epilog
+
     usage = "usage: %prog [options] [aliases]"
     progname = path.basename(__file__)
     epilog = ("".join(["Examples:\n  ",
@@ -231,7 +458,7 @@ def CMDOptions():
         "ssh user@somehost.com\n  ",
         "ssh gates@8.8.8.8 -p 667\n  ",
         "ssh root@somehost.com -t tmux a\n",
-                       "Also, you can edit config file manually: ", conf_file, "\n"]))
+        "Also, you can edit the config file manually: ", conf_file, "\n"]))
     opts = FormatedParser(usage=usage, version="%prog " + version,
                           epilog=epilog)
     opts.add_option('-l', '--list', action="callback",
@@ -242,48 +469,81 @@ def CMDOptions():
     opts.add_option('-a', '--add', action="store", type="string",
                     dest="add", metavar="alias", default=False,
                     help="add new alias for connection string")
+    opts.add_option('-g', '--group', action="store", type="string",
+                    dest="group", metavar="group", default=False,
+                    help="add new group for aliases")
     opts.add_option('-c', '--command', action="store", type="string",
                     dest="command", metavar="command", default=False,
-                    help="add command for executing alias")
+                    help="execute command for aliases and groups")
+    opts.add_option('-t', '--thread', action="store", type="string",
+                    dest="thread", metavar="command", default=False,
+                    help="parallel command execution for aliases and groups " +
+                    "(ssh key authentication or set password required)" )
+    opts.add_option('-k', '--keep', action="store", type="string",
+                    dest="keep", metavar="alias", default=False,
+                    help="hold connection with specified alias")
     opts.add_option('-e', '--edit', action="store", type="string",
                     dest='edit', metavar="alias", default=False,
-                    help="edit existing connection string")
+                    help="edit existing alias or group")
     opts.add_option('-p', '--password', action="store", type="string",
                     dest='password', metavar="alias", default=False,
                     help="set and store password for sshpass [UNSAFE]")
     opts.add_option('-r', '--remove', action="store", type="string",
                     dest='remove', metavar="alias", default=False,
-                    help="remove existing alias of connection string")
+                    help="remove existing alias or group")
     options, alias = opts.parse_args()
     if options.add:
         CMDAdd(options.add)
+    if options.group:
+        CMDGroup(options.group)
     if options.edit:
         CMDEdit(options.edit)
     if options.password:
         CMDPassword(options.password)
     if options.remove:
         CMDRemove(options.remove)
-    if alias:
+    if options.keep:
-        CMDConnect(alias, options.command)
+        HoldConnection(options.keep)
+    if options.thread:
+        Connect(alias, options.thread, True)
+    elif alias:
+        Connect(alias, options.command)
 
 # curses template from: https://stackoverflow.com/a/30828805/6224462
 
 
 def CursesMain():
     help_screen = ("".join([" Press:\n",
-                            "  'z'/'x' or arrows - navigation\n",
+        "  'z'/'x', 'w'/'s' or arrows - navigation\n",
-                            "  'a'/'F2' - add new alias\n",
+        "  'a'/'F2' - add new alias (without spaces)\n",
-                            "  'e'/'F4' - edit existing alias\n",
+        "  'g'/'F5' - add new group (spaces will be stripped)\n",
+        "  'e'/'F4' - edit existing alias/group\n",
         "  'p'/'F6' - set alias's password for sshpass [UNSAFE]\n",
         "  'space'/'insert' - select\n",
         "  'r'/'F8' - remove selected alias/aliases\n",
-                            "  'c'/'F3' - execute specific command with selected alias/aliases\n",
+        "  'c'/'F3' - command execution for alias (group/aliases - in turn)\n",
-                            "  'enter'/'F9' - connect to selected alias/aliases\n",
+        "  't'/'F11' - parallel command execution for aliases and groups\n",
+        "              (ssh key authentication or set password required)\n",
+        "  'k'/'F7' - hold connection with selected alias\n",
+        "  'enter'/'F9' - connect to selected alias/aliases,\n",
+        "                 expand/collapse group\n",
         "  'q'/'F10' - quit\n",
         " Run program with '--help' option to view command line help.\n",
-                            " Also, you can edit config file manually:\n",
+        " Also, you can edit the config file manually:\n",
         "  ", conf_file]))
-    strings = conf.sections()
+    if expand_default == True:
+        groups = []
+        for a in conf.sections():
+            if conf.has_option(a, "group"):
+                groups.append(a)
+        expanded = list(groups)
+        strings = GetTreeList(False, expanded)
+        stringsfull = GetTreeList(True, expanded)
+    elif expand_default == False:
+        groups = []
+        expanded = []
+        strings = GetTreeList(False, expanded)
+        stringsfull = GetTreeList(True, expanded)
     row_num = len(strings)
     selected_strings = [" " for i in range(0, row_num + 1)]
     screen = curses.initscr()
@@ -310,13 +570,7 @@ def CursesMain():
             box.addnstr(1, 1, "There aren't any aliases yet. Press 'a' to add new one.",
                         width - 6, highlight_text)
         else:
-            if conf.has_option(strings[i - 1], "password"):
+            exec_string = ["[", selected_strings[i], "] ", stringsfull[i - 1]]
-                password = " [password]"
-            else:
-                password = ""
-            exec_string = ["[", selected_strings[i], "] ", str(i), " ",
-                           strings[i - 1], " (", conf.get(strings[i - 1], "exec_string"),
-                           ")", password]
             if (i == position):
                 box.addnstr(i, 2, "".join(exec_string), width - 6, highlight_text)
             else:
@@ -337,53 +591,151 @@ def CursesMain():
                         help_screen, normal_text, highlight_text)
         if key_pressed == ord('a') or key_pressed == ord(
                 'A') or key_pressed == curses.KEY_F2:
+            curses.curs_set(1)
             new_alias_textpad = CursesTextpad(screen, 1, width - 8,
                 (height // 2) - 1, 4, "Enter new alias:", "",
                 normal_text, highlight_text)
+            try:
                 add_alias = new_alias_textpad.edit(CursesTextpadConfirm)
-            if not add_alias.rstrip() == "":
+            except CursesTextpadEsc:
-                add_result = AddNewAlias(add_alias.rstrip())
+                add_alias = ""
-                if not add_result:
+            if not add_alias == "":
-                    CursesPanel(screen, 3,
+                add_alias = add_alias.split()[0].strip()
-                                width - 6, (height // 2) - 1, 3, add_result,
+            if not add_alias == "":
-                                normal_text, highlight_text)
+                add_result = AddNewAlias(add_alias)
-                else:
+                if add_result == True:
                     add_string = ""
-                    while add_string.rstrip() == "":
+                    try:
+                        while add_string == "":
                             string_textpad = CursesTextpad(screen, 3,
                                 width - 8, (height // 2) - 1, 4,
                                 "Enter full execution string:",
                                 "ssh ", normal_text, highlight_text)
                             add_string = string_textpad.edit(
                                 CursesTextpadConfirm)
-                    SetAliasString(add_alias.rstrip(),
+                        SetAliasString(add_alias,
                                        add_string.replace("\n", "").rstrip())
-                    strings = conf.sections()
+                    except CursesTextpadEsc:
+                        RemoveAliases([add_alias])
+                        add_alias = ""
+                    strings = GetTreeList(False, expanded)
+                    stringsfull = GetTreeList(True, expanded)
                     row_num = len(strings)
                     selected_strings.append(" ")
                     pages = int(ceil(row_num / max_row))
                     box.refresh()
+                else:
+                    curses.curs_set(0)
+                    CursesPanel(screen, 3,
+                                width - 6, (height // 2) - 1, 3, add_result,
+                                normal_text, highlight_text)
+            curses.curs_set(0)
+        if key_pressed == ord('g') or key_pressed == ord(
+                'G') or key_pressed == curses.KEY_F5:
+            curses.curs_set(1)
+            new_group_textpad = CursesTextpad(screen, 1, width - 8,
+                (height // 2) - 1, 4, "Enter group name (without spaces):", "",
+                normal_text, highlight_text)
+            try:
+                add_group = new_group_textpad.edit(CursesTextpadConfirm)
+            except CursesTextpadEsc:
+                add_group = ""
+            if not add_group == "":
+                add_group = add_group.split()[0].strip()
+            if not add_group == "":
+                add_result = AddNewAlias(add_group)
+                if add_result == True:
+                    add_string = ""
+                    try:
+                        while add_string.rstrip() == "":
+                            string_textpad = CursesTextpad(screen, 3,
+                                width - 8, (height // 2) - 1, 4,
+                                "Enter aliases for new group (example: alias1 alias2):",
+                                "", normal_text, highlight_text)
+                            add_string = string_textpad.edit(
+                                CursesTextpadConfirm)
+                        SetGroupString(add_group,
+                                       add_string.replace("\n", "").rstrip())
+                        expanded.append(add_group)
+                    except CursesTextpadEsc:
+                        RemoveAliases([add_group])
+                        add_group = ""
+                    strings = GetTreeList(False, expanded)
+                    stringsfull = GetTreeList(True, expanded)
+                    row_num = len(strings)
+                    selected_strings = [" " for i in range(0, row_num + 1)]
+                    pages = int(ceil(row_num / max_row))
+                    box.refresh()
+                else:
+                    curses.curs_set(0)
+                    CursesPanel(screen, 3,
+                                width - 6, (height // 2) - 1, 3, add_result,
+                                normal_text, highlight_text)
+            curses.curs_set(0)
         if (key_pressed == ord('e') or key_pressed == ord(
                 'E') or key_pressed == curses.KEY_F4) and row_num != 0:
             edit_string = ""
+            groups = []
+            for a in conf.sections():
+                if conf.has_option(a, "group"):
+                    groups.append(a)
+            curses.curs_set(1)
+            if strings[position - 1] in groups:
+                while edit_string.rstrip() == "":
+                    string_textpad = CursesTextpad(screen, 3, width - 8,
+                        (height // 2) - 1, 4, "Enter new aliases for existing group:",
+                        (conf.get(strings[position - 1],
+                        "group") if conf.has_option(strings[position - 1],
+                        "group") else ""),
+                        normal_text, highlight_text)
+                    try:
+                        edit_string = string_textpad.edit(CursesTextpadConfirm)
+                    except CursesTextpadEsc:
+                        edit_string = conf.get(strings[position - 1],
+                            "group") if conf.has_option(strings[position - 1],
+                            "group") else ""
+                SetGroupString(strings[position - 1],
+                               edit_string.replace("\n", "").rstrip())
+                strings = GetTreeList(False, expanded)
+                stringsfull = GetTreeList(True, expanded)
+                row_num = len(strings)
+                selected_strings.append(" ")
+                pages = int(ceil(row_num / max_row))
+                box.refresh()
+            else:
                 while edit_string.rstrip() == "":
                     string_textpad = CursesTextpad(screen, 3, width - 8,
                         (height // 2) - 1, 4, "Enter new execution string:",
-                                               conf.get(strings[position - 1], "exec_string"),
+                        (conf.get(strings[position - 1].split()[0].strip(),
+                        "exec_string") if conf.has_option(strings[position - 1].split()[0].strip(),
+                        "exec_string") else ""),
                         normal_text, highlight_text)
+                    try:
                         edit_string = string_textpad.edit(CursesTextpadConfirm)
-            SetAliasString(strings[position - 1],
+                    except CursesTextpadEsc:
+                        edit_string = conf.get(strings[position - 1].split()[0].strip(),
+                            "exec_string") if conf.has_option(strings[position - 1].split()[0].strip(),
+                            "exec_string") else ""
+                SetAliasString(strings[position - 1].split()[0].strip(),
                                edit_string.replace("\n", "").rstrip())
-            strings = conf.sections()
+                strings = GetTreeList(False, expanded)
+                stringsfull = GetTreeList(True, expanded)
+            curses.curs_set(0)
         if (key_pressed == ord('p') or key_pressed == ord(
                 'P') or key_pressed == curses.KEY_F6) and row_num != 0:
+            groups = []
+            for a in conf.sections():
+                if conf.has_option(a, "group"):
+                    groups.append(a)
+            if not strings[position - 1].split()[0].strip() in groups:
                 set_password = ""
                 set_password = CursesPanel(screen, 4, width - 6,
                     (height // 2) - 1, 3,
                     " Enter user password for sshpass and press 'enter':\n>",
                     normal_text, highlight_text, "password")
-            if not set_password == "":
+                SetPassword(strings[position - 1].split()[0].strip(), set_password)
-                SetPassword(strings[position - 1], set_password)
+                strings = GetTreeList(False, expanded)
+                stringsfull = GetTreeList(True, expanded)
         if (key_pressed == ord('r') or key_pressed == ord(
                 'R') or key_pressed == curses.KEY_F8 or key_pressed == (
                 curses.KEY_DC)) and row_num != 0:
@@ -397,14 +749,15 @@ def CursesMain():
                              str(len(selected)), " selected aliases? (y/N)"]))
             else:
                 remove_confirm = ("".join(["Are you sure to remove '",
-                                           strings[position - 1], "' alias? (y/N)"]))
+                    strings[position - 1].split()[0].strip(), "' alias? (y/N)"]))
-                selected.append(strings[position - 1])
+                selected.append(strings[position - 1].split()[0].strip())
             remove_result = CursesPanel(screen, 4, width - 6,
                 (height // 2) - 1, 3, remove_confirm, normal_text,
                 highlight_text, "remove")
             if remove_result == "confirm":
                 RemoveAliases(selected)
-                strings = conf.sections()
+                strings = GetTreeList(False, expanded)
+                stringsfull = GetTreeList(True, expanded)
                 row_num = len(strings)
                 selected_strings = [" " for i in range(0, row_num + 1)]
                 pages = int(ceil(row_num / max_row))
@@ -418,25 +771,78 @@ def CursesMain():
                 if selected_strings[i] == "*":
                     selected.append(strings[i - 1])
             if not len(selected) > 0:
-                selected.append(strings[position - 1])
+                selected.append(strings[position - 1].split()[0].strip())
+            curses.curs_set(1)
             command_textpad = CursesTextpad(screen, 3, width - 8,
                 (height // 2) - 1, 4,
                 "".join([
                     "Enter specific command to execute with selected ",
                     "alias/aliases:"]
                 ), "", normal_text, highlight_text)
+            try:
                 command_string = command_textpad.edit(CursesTextpadConfirm)
-            CursesConnect(screen, selected,
+                Connect(selected, command_string.replace("\n", "").rstrip(), 
-                          command_string.replace("\n", "").rstrip())
+                        False, screen)
-        if (key_pressed == ord("\n") or key_pressed == (
+            except CursesTextpadEsc:
-                curses.KEY_F9)) and row_num != 0:
+                command_string = ""
+            curses.curs_set(0)
+        if (key_pressed == ord('t') or key_pressed == ord(
+                'T') or key_pressed == curses.KEY_F11) and row_num != 0:
             selected = []
             for i in range(1, row_num + 1):
                 if selected_strings[i] == "*":
                     selected.append(strings[i - 1])
             if not len(selected) > 0:
-                selected.append(strings[position - 1])
+                selected.append(strings[position - 1].split()[0].strip())
-            CursesConnect(screen, selected)
+            curses.curs_set(1)
+            command_textpad = CursesTextpad(screen, 3, width - 8,
+                (height // 2) - 1, 4,
+                "".join([
+                    "Enter specific command to execute with selected ",
+                    "alias/aliases:"]
+                ), "", normal_text, highlight_text)
+            try:
+                command_string = command_textpad.edit(CursesTextpadConfirm)
+                Connect(selected, command_string.replace("\n", "").rstrip(),
+                        True, screen)
+            except CursesTextpadEsc:
+                command_string = ""
+            curses.curs_set(0)
+        if (key_pressed == ord('k') or key_pressed == ord('K') or
+                key_pressed == (curses.KEY_F7)) and row_num != 0:
+            groups = []
+            for a in conf.sections():
+                if conf.has_option(a, "group"):
+                    groups.append(a)
+            if not strings[position - 1] in groups:
+                curses.endwin()
+                HoldConnection(strings[position - 1].split()[0].strip())
+        if (key_pressed == ord("\n") or key_pressed == (
+                curses.KEY_F9)) and row_num != 0:
+            groups = []
+            for a in conf.sections():
+                if conf.has_option(a, "group"):
+                    groups.append(a)
+            if strings[position - 1] in groups:
+                if strings[position - 1] in expanded:
+                    expanded.remove(strings[position - 1])
+                else:
+                    expanded.append(strings[position - 1])
+                strings = GetTreeList(False, expanded)
+                stringsfull = GetTreeList(True, expanded)
+                row_num = len(strings)
+                selected_strings.append(" ")
+                pages = int(ceil(row_num / max_row))
+                box.refresh()
+            else:
+                selected = []
+                for i in range(1, row_num + 1):
+                    if selected_strings[i] == "*":
+                        selected.append(strings[i - 1])
+                if not len(selected) > 0:
+                    selected.append(strings[position - 1].split()[0].strip())
+                Connect(selected, False, False, screen)
+            selected_strings = [" " for i in range(0, row_num + 1)]
         if (key_pressed == 32 or key_pressed == (
                 curses.KEY_IC)) and row_num != 0:
             if selected_strings[position] == ' ':
@@ -460,7 +866,8 @@ def CursesMain():
                     page = page + 1
                     position = 1 + (max_row * (page - 1))
         if key_pressed == curses.KEY_DOWN or key_pressed == ord(
-                'x') or key_pressed == ord('X'):
+                'x') or key_pressed == ord('X') or key_pressed == ord(
+                's') or key_pressed == ord('S'):
             if page == 1:
                 if position < i:
                     position = position + 1
@@ -478,7 +885,8 @@ def CursesMain():
                     page = page + 1
                     position = 1 + (max_row * (page - 1))
         if key_pressed == curses.KEY_UP or key_pressed == ord(
-                'z') or key_pressed == ord('Z'):
+                'z') or key_pressed == ord('Z') or key_pressed == ord(
+                'w') or key_pressed == ord('W'):
             if page == 1:
                 if position > 1:
                     position = position - 1
@@ -498,6 +906,12 @@ def CursesMain():
             if page < pages:
                 page = page + 1
                 position = (1 + (max_row * (page - 1)))
+        if key_pressed == curses.KEY_HOME:
+                page = 1
+                position = 1
+        if key_pressed == curses.KEY_END:
+                page = pages
+                position = row_num
         box.erase()
         screen.border(0)
         box.border(0)
@@ -507,13 +921,7 @@ def CursesMain():
                 box.addnstr(1, 1, "There aren't any aliases yet. Press 'a' to add new one.",
                             width - 6, highlight_text)
             else:
-                if conf.has_option(strings[i - 1], "password"):
+                exec_string = ["[", selected_strings[i], "] ", stringsfull[i - 1]]
-                    password = " [password]"
-                else:
-                    password = ""
-                exec_string = ["[", selected_strings[i], "] ", str(i), " ",
-                               strings[i - 1], " (", conf.get(strings[i - 1], "exec_string"),
-                               ")", password]
                 if (i + (max_row * (page - 1)) == (position + (max_row * (page - 1)))):
                     box.addnstr(i - (max_row * (page - 1)), 2, "".join(
                         exec_string), width - 6, highlight_text)
@@ -529,26 +937,57 @@ def CursesMain():
 
 
 if __name__ == "__main__":
-    conf = ConfigParser.RawConfigParser()
+    try:
+        input = raw_input   # Fix for Python 2.x
+    except NameError:
+        pass
+
+    if not path.exists(conf_dir):
+        try:
+            from os import makedirs 
+            makedirs(conf_dir)
+        except:
+            print("Can't make dir " + conf_dir)
+            exit()
+
+    conf = configparser.RawConfigParser()
+
     if not path.exists(conf_file):
+        try:
             open(conf_file, 'w')
+        except:
+            print("Can't make file at " + conf_dir)
+            exit()
+    
+    try:
         conf.read(conf_file)
+    except:
+        print("Error: can't read config file " + conf_file)
+        exit()
+
     if len(argv) > 1:
         try:
             CMDOptions()
         except KeyboardInterrupt:
             exit()
-        except ConfigParser.Error:
+        except configparser.Error:
             print("Error: can't parse your config file, please check it manually or make new one")
             exit()
+        except IOError:
+            print("Error: can't use your config file, please check permissionss of " + conf_file)
+            exit()
+
     else:
         try:
             CursesMain()
         except KeyboardInterrupt:
             CursesExit()
-        except ConfigParser.NoOptionError:
+        except configparser.NoOptionError:
             CursesExit("".join(["Error: can't parse your config file, please ",
                        "check it manually or make new one"]))
         except curses.error:
             CursesExit("".join(["Error: can't show some curses element, maybe ",
                        "your terminal is too small"]))
+        except IOError:
+            CursesExit("".join(["Error: can't use your config file, please ",
+                       "check permissionss of ", conf_file]))