traverseda
/
cpython
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Prevent the pty test from hanging by setting an alarm. 

Currently, test_pty hangs on AIX & HPUX if run after test_openpty.
This commit is contained in:
Neal Norwitz 2003-03-21 01:39:14 +00:00
parent ef4b7ed42b
commit 7d8145268e
1 changed files with 46 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

76
Lib/test/test_pty.py
View File

@ -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 @@ else:
# 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.