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- added popen.popen2/popen3/popen4 support for

Browse source 
windows.

- added optional mode argument to popen2/popen3
  for unix; if the second argument is an integer,
  it's assumed to be the buffer size.

- changed nt.popen2/popen3/popen4 return values
  to match the popen2 module (stdout first, not
  stdin).
This commit is contained in:
Fredrik Lundh 2000-07-09 17:59:32 +00:00
parent 766ccdcf18
commit bb7eeff44a
2 changed files with 46 additions and 22 deletions
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54
Lib/popen2.py
View file

@ -89,31 +89,55 @@ class Popen3:
_active.remove(self)
return self.sts
def popen2(cmd, bufsize=-1):
"""Execute the shell command 'cmd' in a sub-process. If 'bufsize' is
specified, it sets the buffer size for the I/O pipes. The file objects
(child_stdout, child_stdin) are returned."""
_cleanup()
inst = Popen3(cmd, 0, bufsize)
return inst.fromchild, inst.tochild
try:
from os import popen2
except NameError:
def popen2(cmd, mode='t', bufsize=-1):
"""Execute the shell command 'cmd' in a sub-process. If 'bufsize' is
specified, it sets the buffer size for the I/O pipes. The file objects
(child_stdout, child_stdin) are returned."""
if type(mode) is type(0) and bufsize == -1:
bufsize = mode
mode = 't'
assert mode in ('t', 'b')
_cleanup()
inst = Popen3(cmd, 0, bufsize)
return inst.fromchild, inst.tochild
def popen3(cmd, bufsize=-1):
"""Execute the shell command 'cmd' in a sub-process. If 'bufsize' is
specified, it sets the buffer size for the I/O pipes. The file objects
(child_stdout, child_stdin, child_stderr) are returned."""
_cleanup()
inst = Popen3(cmd, 1, bufsize)
return inst.fromchild, inst.tochild, inst.childerr
try:
from os import popen3
except NameError:
def popen3(cmd, mode='t', bufsize=-1):
"""Execute the shell command 'cmd' in a sub-process. If 'bufsize' is
specified, it sets the buffer size for the I/O pipes. The file objects
(child_stdout, child_stdin, child_stderr) are returned."""
if type(mode) is type(0) and bufsize == -1:
bufsize = mode
mode = 't'
assert mode in ('t', 'b')
_cleanup()
inst = Popen3(cmd, 1, bufsize)
return inst.fromchild, inst.tochild, inst.childerr
try:
from os import popen4
except NameError:
pass # not on unix
def _test():
teststr = "abc\n"
print "testing popen2..."
r, w = popen2('cat')
print r, w
w.write(teststr)
w.close()
assert r.read() == teststr
print "testing popen3..."
r, w, e = popen3(['cat'])
try:
r, w, e = popen3(['cat'])
except:
r, w, e = popen3('cat')
print r, w, e
w.write(teststr)
w.close()
assert r.read() == teststr