# HG changeset patch
# User Yuya Nishihara <yuya@tcha.org>
# Date 1484393495 -32400
# Node ID b96c57c1f860f856958715b0bff00e1daff23175
# Parent  2cbbd4622ab06cb0da1a165064720bbbebefa227
ui: check EOF of getpass() response read from command-server channel

readline() returns '' only when EOF is encountered, in which case, Python's
getpass() raises EOFError. We should do the same to abort the session as
"response expected."

This bug was reported to
https://bitbucket.org/tortoisehg/thg/issues/4659/

diff -r 2cbbd4622ab0 -r b96c57c1f860 mercurial/ui.py
--- a/mercurial/ui.py	Fri Jan 13 23:21:10 2017 -0800
+++ b/mercurial/ui.py	Sat Jan 14 20:31:35 2017 +0900
@@ -972,7 +972,10 @@
             # disable getpass() only if explicitly specified. it's still valid
             # to interact with tty even if fin is not a tty.
             if self.configbool('ui', 'nontty'):
-                return self.fin.readline().rstrip('\n')
+                l = self.fin.readline()
+                if not l:
+                    raise EOFError
+                return l.rstrip('\n')
             else:
                 return getpass.getpass('')
         except EOFError:
diff -r 2cbbd4622ab0 -r b96c57c1f860 tests/test-commandserver.t
--- a/tests/test-commandserver.t	Fri Jan 13 23:21:10 2017 -0800
+++ b/tests/test-commandserver.t	Sat Jan 14 20:31:35 2017 +0900
@@ -607,6 +607,12 @@
   ...     runcommand(server, ['debuggetpass', '--config',
   ...                         'ui.interactive=True'],
   ...                input=stringio('1234\n'))
+  ...     runcommand(server, ['debuggetpass', '--config',
+  ...                         'ui.interactive=True'],
+  ...                input=stringio('\n'))
+  ...     runcommand(server, ['debuggetpass', '--config',
+  ...                         'ui.interactive=True'],
+  ...                input=stringio(''))
   ...     runcommand(server, ['debugprompt', '--config',
   ...                         'ui.interactive=True'],
   ...                input=stringio('5678\n'))
@@ -614,6 +620,11 @@
   ...     runcommand(server, ['debugwritestdout'])
   *** runcommand debuggetpass --config ui.interactive=True
   password: 1234
+  *** runcommand debuggetpass --config ui.interactive=True
+  password: 
+  *** runcommand debuggetpass --config ui.interactive=True
+  password: abort: response expected
+   [255]
   *** runcommand debugprompt --config ui.interactive=True
   prompt: 5678
   *** runcommand debugreadstdin