diff options
| author | John Snow <jsnow@redhat.com> | 2017-04-27 18:36:28 -0400 |
|---|---|---|
| committer | Markus Armbruster <armbru@redhat.com> | 2017-05-09 09:14:40 +0200 |
| commit | aa3b167f21588a87e7783ac29aa54b0c721eb37a (patch) | |
| tree | d19aeb803a9dfb252af11546600fe0f6f054e040 /scripts/qmp | |
| parent | 8b2e41d733850ec6a67a85743138e023cbb8921b (diff) | |
qmp-shell: add persistent command history
Use the existing readline history function we are utilizing
to provide persistent command history across instances of qmp-shell.
This assists entering debug commands across sessions that may be
interrupted by QEMU sessions terminating, where the qmp-shell has
to be relaunched.
Signed-off-by: John Snow <jsnow@redhat.com>
Message-Id: <20170427223628.20893-1-jsnow@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Kashyap Chamarthy <kchamart@redhat.com>
Tested-by: Kashyap Chamarthy <kchamart@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Diffstat (limited to 'scripts/qmp')
| -rwxr-xr-x | scripts/qmp/qmp-shell | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/scripts/qmp/qmp-shell b/scripts/qmp/qmp-shell index eccb88a4e8..6ece6e7c81 100755 --- a/scripts/qmp/qmp-shell +++ b/scripts/qmp/qmp-shell @@ -70,6 +70,9 @@ import json import ast import readline import sys +import os +import errno +import atexit class QMPCompleter(list): def complete(self, text, state): @@ -109,6 +112,8 @@ class QMPShell(qmp.QEMUMonitorProtocol): self._pretty = pretty self._transmode = False self._actions = list() + self._histfile = os.path.join(os.path.expanduser('~'), + '.qmp-shell_history') def __get_address(self, arg): """ @@ -132,11 +137,27 @@ class QMPShell(qmp.QEMUMonitorProtocol): def __completer_setup(self): self._completer = QMPCompleter() self._fill_completion() + readline.set_history_length(1024) readline.set_completer(self._completer.complete) readline.parse_and_bind("tab: complete") # XXX: default delimiters conflict with some command names (eg. query-), # clearing everything as it doesn't seem to matter readline.set_completer_delims('') + try: + readline.read_history_file(self._histfile) + except Exception as e: + if isinstance(e, IOError) and e.errno == errno.ENOENT: + # File not found. No problem. + pass + else: + print "Failed to read history '%s'; %s" % (self._histfile, e) + atexit.register(self.__save_history) + + def __save_history(self): + try: + readline.write_history_file(self._histfile) + except Exception as e: + print "Failed to save history file '%s'; %s" % (self._histfile, e) def __parse_value(self, val): try: |