diff -up yum-3.4.3/docs/yum.conf.5.orig yum-3.4.3/docs/yum.conf.5

--- yum-3.4.3/docs/yum.conf.5.orig	2017-11-24 20:52:02.648462776 +0100

+++ yum-3.4.3/docs/yum.conf.5	2017-11-24 20:52:18.483380945 +0100

@@ -1016,6 +1016,15 @@ If set to False, 'yum update' will fail

 names (package, group, rpm file). It will also fail if the provided name is a package

 which is available, but not installed. Boolean (1, 0, True, False, yes, no). Defaults to True.

+.IP

+\fBshell_exit_status\fR

+Determines the exit status that should be returned by `yum shell' when it

+terminates after reading the `exit' command or EOF.

+Possible values are: 0, ?.

+If ? is set, the exit status is that of the last command executed before `exit'

+(bash-like behavior).

+Defaults to 0.

+

 .SH "[repository] OPTIONS"

 .LP 

 The repository section(s) take the following form:

diff -up yum-3.4.3/docs/yum-shell.8.orig yum-3.4.3/docs/yum-shell.8

--- yum-3.4.3/docs/yum-shell.8.orig	2011-06-28 22:27:22.000000000 +0200

+++ yum-3.4.3/docs/yum-shell.8	2017-11-24 20:52:18.483380945 +0100

@@ -31,6 +31,12 @@ information. There are a few additional

      reset: reset (zero-out) the transaction 

      solve: run the dependency solver on the transaction

      run: run the transaction 

+.IP

+.IP "\fBexit\fP"

+     Causes the shell to exit, setting the exit status as specified by the

+     \fBshell_exit_status\fR option in \fIyum.conf(5)\fR.

+     This command is also triggered when EOF is read (usually the C-d keystroke

+     or end of script).

 .PP 

 .SH "Examples"

diff -up yum-3.4.3/shell.py.orig yum-3.4.3/shell.py

--- yum-3.4.3/shell.py.orig	2017-11-24 20:52:02.580463129 +0100

+++ yum-3.4.3/shell.py	2017-11-24 20:52:18.483380945 +0100

@@ -126,6 +126,7 @@ class YumShell(cmd.Cmd):

         :param line: the next line of input

         """

+        self.result = 0

         if len(line) > 0 and line.strip()[0] == '#':

             pass

         else:

@@ -150,7 +151,8 @@ class YumShell(cmd.Cmd):

             except Errors.YumBaseError:

                 pass

             else:

-                self.base.doCommands()

+                result, _ = self.base.doCommands()

+                self.result = result

     def emptyline(self):

         """Do nothing on an empty line of input."""

@@ -211,13 +213,14 @@ class YumShell(cmd.Cmd):

             self.base.shellUsage()

         self.verbose_logger.info(msg)

+        self.result = 0

     def do_EOF(self, line):

         """Exit the shell when EOF is reached.

         :param line: unused

         """

-        self.resultmsgs = ['Leaving Shell']

+        self.do_exit(line)

         return True

     def do_quit(self, line):

@@ -225,7 +228,7 @@ class YumShell(cmd.Cmd):

         :param line: unused

         """

-        self.resultmsgs = ['Leaving Shell']

+        self.do_exit(line)

         return True

     def do_exit(self, line):

@@ -233,6 +236,9 @@ class YumShell(cmd.Cmd):

         :param line: unused

         """

+        # Make sure we don't go onto the next stage in yummain (result == 2)

+        if self.base.conf.shell_exit_status == '0' or self.result == 2:

+            self.result = 0

         self.resultmsgs = ['Leaving Shell']

         return True

@@ -254,6 +260,7 @@ class YumShell(cmd.Cmd):

         :param line: the remainder of the line, containing the name of

            a subcommand.  If no subcommand is given, run the list subcommand.

         """

+        self.result = 0

         (cmd, args, line) = self.parseline(line)

         if cmd in ['list', None]:

             self.verbose_logger.log(logginglevels.INFO_2,

@@ -267,11 +274,13 @@ class YumShell(cmd.Cmd):

                 (code, msgs) = self.base.buildTransaction()

             except Errors.YumBaseError, e:

                 self.logger.critical('Error building transaction: %s', e)

+                self.result = 1

                 return False

             if code == 1:

                 for msg in msgs:

                     self.logger.critical('Error: %s', msg)

+                self.result = 1

             else:

                 self.verbose_logger.log(logginglevels.INFO_2,

                     'Success resolving dependencies')

@@ -292,6 +301,7 @@ class YumShell(cmd.Cmd):

            value is given, print the current value.  If a value is

            supplied, set the option to the given value.

         """

+        self.result = 0

         (cmd, args, line) = self.parseline(line)

         # logs

         if cmd in ['debuglevel', 'errorlevel']:

@@ -305,6 +315,7 @@ class YumShell(cmd.Cmd):

                     val = int(val)

                 except ValueError:

                     self.logger.critical('Value %s for %s cannot be made to an int', val, cmd)

+                    self.result = 1

                     return

                 setattr(self.base.conf, cmd, val)

                 if cmd == 'debuglevel':

@@ -321,6 +332,7 @@ class YumShell(cmd.Cmd):

                 value = opts[0]

                 if value.lower() not in BOOLEAN_STATES:

                     self.logger.critical('Value %s for %s is not a Boolean', value, cmd)

+                    self.result = 1

                     return False

                 value = BOOLEAN_STATES[value.lower()]

                 setattr(self.base.conf, cmd, value)

@@ -363,6 +375,7 @@ class YumShell(cmd.Cmd):

            a subcommand and other parameters if required.  If no

            subcommand is given, run the list subcommand.

         """

+        self.result = 0

         (cmd, args, line) = self.parseline(line)

         if cmd in ['list', None]:

             # Munge things to run the repolist command

@@ -380,7 +393,8 @@ class YumShell(cmd.Cmd):

             except Errors.YumBaseError:

                 pass

             else:

-                self.base.doCommands()

+                result, _ = self.base.doCommands()

+                self.result = result

         elif cmd == 'enable':

             repos = self._shlex_split(args)

@@ -392,8 +406,10 @@ class YumShell(cmd.Cmd):

                     changed = self.base.repos.enableRepo(repo)

                 except Errors.ConfigError, e:

                     self.logger.critical(e)

+                    self.result = 1

                 except Errors.RepoError, e:

                     self.logger.critical(e)

+                    self.result = 1

                 else:

                     for repo in changed:

@@ -402,6 +418,7 @@ class YumShell(cmd.Cmd):

                         except Errors.RepoError, e:

                             self.logger.critical('Disabling Repository')

                             self.base.repos.disableRepo(repo)

+                            self.result = 1

                             return False

                     self.base.up = None

@@ -413,8 +430,10 @@ class YumShell(cmd.Cmd):

                     offrepos = self.base.repos.disableRepo(repo)

                 except Errors.ConfigError, e:

                     self.logger.critical(e)

+                    self.result = 1

                 except Errors.RepoError, e:

                     self.logger.critical(e)

+                    self.result = 1

                 else:

                     # close the repos, too

@@ -432,36 +451,45 @@ class YumShell(cmd.Cmd):

         print cmd

         print args

         print line

+        self.result = 0

     def do_run(self, line):

         """Run the transaction.

         :param line: unused

         """

+        self.result = 0

         if len(self.base.tsInfo) > 0:

             try:

                 (code, msgs) = self.base.buildTransaction()

                 if code == 1:

                     for msg in msgs:

                         self.logger.critical('Error: %s', msg)

+                    self.result = 1

                     return False

                 returnval = self.base.doTransaction()

             except Errors.YumBaseError, e:

                 self.logger.critical('Error: %s', e)

+                self.result = 1

             except KeyboardInterrupt, e:

                 self.logger.critical('\n\nExiting on user cancel')

+                self.result = 1

             except IOError, e:

                 if e.errno == 32:

                     self.logger.critical('\n\nExiting on Broken Pipe')

+                self.result = 1

             else:

                 if returnval not in [0,1,-1]:

                     self.verbose_logger.info('Transaction encountered a serious error.')

+                    self.result = 1

                 else:

                     if returnval == 1:

                         self.verbose_logger.info('There were non-fatal errors in the transaction')

+                        self.result = 1

                     elif returnval == -1:

                         self.verbose_logger.info("Transaction didn't start")

+                        self.result = 1

                     self.verbose_logger.log(logginglevels.INFO_2,

                         'Finished Transaction')

                 self.base.closeRpmDB()

diff -up yum-3.4.3/yum/config.py.orig yum-3.4.3/yum/config.py

--- yum-3.4.3/yum/config.py.orig	2017-11-24 20:52:02.648462776 +0100

+++ yum-3.4.3/yum/config.py	2017-11-24 20:52:18.484380940 +0100

@@ -931,6 +931,8 @@ class YumConf(StartupConf):

     usr_w_check = BoolOption(True)

+    shell_exit_status = SelectionOption('0', ('0', '?'))

+

     _reposlist = []

     def dump(self):