Prevent the pty test from hanging by setting an alarm.
Currently, test_pty hangs on AIX & HPUX if run after test_openpty.
diff --git a/Lib/test/test_pty.py b/Lib/test/test_pty.py
index eb833f0..7a1b7b1 100644
--- a/Lib/test/test_pty.py
+++ b/Lib/test/test_pty.py
@@ -1,4 +1,4 @@
-import pty, os, sys
+import pty, os, sys, signal
from test.test_support import verbose, TestFailed, TestSkipped
TEST_STRING_1 = "I wish to buy a fish license.\n"
@@ -14,36 +14,52 @@
# Marginal testing of pty suite. Cannot do extensive 'do or fail' testing
# because pty code is not too portable.
+def test_basic_pty():
+ try:
+ debug("Calling master_open()")
+ master_fd, slave_name = pty.master_open()
+ debug("Got master_fd '%d', slave_name '%s'"%(master_fd, slave_name))
+ debug("Calling slave_open(%s)"%`slave_name`)
+ slave_fd = pty.slave_open(slave_name)
+ debug("Got slave_fd '%d'"%slave_fd)
+ except OSError:
+ # " An optional feature could not be imported " ... ?
+ raise TestSkipped, "Pseudo-terminals (seemingly) not functional."
+
+ if not os.isatty(slave_fd):
+ raise TestFailed, "slave_fd is not a tty"
+
+ # IRIX apparently turns \n into \r\n. Allow that, but avoid allowing other
+ # differences (like extra whitespace, trailing garbage, etc.)
+
+ debug("Writing to slave_fd")
+ os.write(slave_fd, TEST_STRING_1)
+ s1 = os.read(master_fd, 1024)
+ sys.stdout.write(s1.replace("\r\n", "\n"))
+
+ debug("Writing chunked output")
+ os.write(slave_fd, TEST_STRING_2[:5])
+ os.write(slave_fd, TEST_STRING_2[5:])
+ s2 = os.read(master_fd, 1024)
+ sys.stdout.write(s2.replace("\r\n", "\n"))
+
+ os.close(slave_fd)
+ os.close(master_fd)
+
+def handle_sig(sig, frame):
+ raise TestFailed, "isatty hung"
+
+# isatty() and close() can hang on some platforms
+# set an alarm before running the test to make sure we don't hang forever
+old_alarm = signal.signal(signal.SIGALRM, handle_sig)
+signal.alarm(10)
+
try:
- debug("Calling master_open()")
- master_fd, slave_name = pty.master_open()
- debug("Got master_fd '%d', slave_name '%s'"%(master_fd, slave_name))
- debug("Calling slave_open(%s)"%`slave_name`)
- slave_fd = pty.slave_open(slave_name)
- debug("Got slave_fd '%d'"%slave_fd)
-except OSError:
- # " An optional feature could not be imported " ... ?
- raise TestSkipped, "Pseudo-terminals (seemingly) not functional."
-
-if not os.isatty(slave_fd):
- raise TestFailed, "slave_fd is not a tty"
-
-# IRIX apparently turns \n into \r\n. Allow that, but avoid allowing other
-# differences (like extra whitespace, trailing garbage, etc.)
-
-debug("Writing to slave_fd")
-os.write(slave_fd, TEST_STRING_1)
-s1 = os.read(master_fd, 1024)
-sys.stdout.write(s1.replace("\r\n", "\n"))
-
-debug("Writing chunked output")
-os.write(slave_fd, TEST_STRING_2[:5])
-os.write(slave_fd, TEST_STRING_2[5:])
-s2 = os.read(master_fd, 1024)
-sys.stdout.write(s2.replace("\r\n", "\n"))
-
-os.close(slave_fd)
-os.close(master_fd)
+ test_basic_pty()
+finally:
+ # remove alarm, restore old alarm handler
+ signal.alarm(0)
+ signal.signal(signal.SIGALRM, old_alarm)
# basic pty passed.