[12/17] tools/kvm_stat: display regex when set to non-default

Commit Message

Stefan Raspl Feb. 20, 2017, 3:42 p.m. UTC

If a user defines a regex filter through the interactive command, display
the active regex in the header's second line.

Signed-off-by: Stefan Raspl <[e-mail]>
Reviewed-by: Marc Hartmayer <[e-mail]>
---
 tools/kvm/kvm_stat/kvm_stat | 6 ++++++
 1 file changed, 6 insertions(+)

Patch

diff --git a/tools/kvm/kvm_stat/kvm_stat b/tools/kvm/kvm_stat/kvm_stat
index db6a624..da7bd0b 100755
--- a/tools/kvm/kvm_stat/kvm_stat
+++ b/tools/kvm/kvm_stat/kvm_stat
@@ -834,6 +834,7 @@  NUMBER_WIDTH = 10
 DELAY_INITIAL = 0.25
 DELAY_REGULAR = 3.
 MAX_GUEST_NAME_LEN = 48
+MAX_REGEX_LEN = 44
 
 
 class Tui(object):
@@ -904,6 +905,11 @@  class Tui(object):
                                .format(pid, gname), curses.A_BOLD)
         else:
             self.screen.addstr(0, 0, 'kvm statistics - summary', curses.A_BOLD)
+        if self.stats.fields_filter and self.stats.fields_filter != '^[^\(]*$':
+            regex = self.stats.fields_filter
+            if len(regex) > MAX_REGEX_LEN:
+                regex = regex[:MAX_REGEX_LEN] + '...'
+            self.screen.addstr(1, 17, 'regex filter: {0}'.format(regex))
         self.screen.addstr(2, 1, 'Event')
         self.screen.addstr(2, 1 + LABEL_WIDTH + NUMBER_WIDTH -
                            len('Total'), 'Total')