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tools/kvm_stat: print error on invalid regex

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Entering an invalid regular expression did not produce any indication of an
error so far.
To reproduce, press 'f' and enter 'foo(' (with an unescaped bracket).

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Stefan Raspl 2018-02-05 13:59:58 +01:00 committed by Paolo Bonzini
parent 3df33a0f34
commit 1cd8bfb1ed
1 changed files with 3 additions and 0 deletions
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3
tools/kvm/kvm_stat/kvm_stat
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@ -1176,6 +1176,7 @@ class Tui(object):
Asks for a valid regex and sets the fields filter accordingly. Asks for a valid regex and sets the fields filter accordingly.
""" """
msg = ''
while True: while True:
self.screen.erase() self.screen.erase()
self.screen.addstr(0, 0, self.screen.addstr(0, 0,
@ -1184,6 +1185,7 @@ class Tui(object):
self.screen.addstr(2, 0, self.screen.addstr(2, 0,
"Current regex: {0}" "Current regex: {0}"
.format(self.stats.fields_filter)) .format(self.stats.fields_filter))
self.screen.addstr(5, 0, msg)
self.screen.addstr(3, 0, "New regex: ") self.screen.addstr(3, 0, "New regex: ")
curses.echo() curses.echo()
regex = self.screen.getstr().decode(ENCODING) regex = self.screen.getstr().decode(ENCODING)
@ -1198,6 +1200,7 @@ class Tui(object):
self.refresh_header() self.refresh_header()
return return
except re.error: except re.error:
msg = '"' + regex + '": Not a valid regular expression'
continue continue
def show_vm_selection_by_pid(self): def show_vm_selection_by_pid(self):