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Add optional bufsize argument to various calls so we can make the 

os.fdopen() calls unbuffered.  I presume that it's enough if we can
make all three of them (for stdin, stdout, and stderr) unbuffered and
don't need to specify different buffer sizes per file -- that would
complicate the interface more than I care for.
This commit is contained in:
Guido van Rossum 1997-09-29 04:04:39 +00:00
parent 54e2091ba2
commit da286666b2
1 changed files with 8 additions and 8 deletions
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16
Lib/popen2.py
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@ -11,7 +11,7 @@ def _cleanup():
inst.poll()
class Popen3:
def __init__(self, cmd, capturestderr=0):
def __init__(self, cmd, capturestderr=0, bufsize=-1):
if type(cmd) == type(''):
cmd = ['/bin/sh', '-c', cmd]
p2cread, p2cwrite = os.pipe()
@ -41,12 +41,12 @@ class Popen3:
# Shouldn't come here, I guess
os._exit(1)
os.close(p2cread)
self.tochild = os.fdopen(p2cwrite, 'w')
self.tochild = os.fdopen(p2cwrite, 'w', bufsize)
os.close(c2pwrite)
self.fromchild = os.fdopen(c2pread, 'r')
self.fromchild = os.fdopen(c2pread, 'r', bufsize)
if capturestderr:
os.close(errin)
self.childerr = os.fdopen(errout, 'r')
self.childerr = os.fdopen(errout, 'r', bufsize)
else:
self.childerr = None
self.sts = -1 # Child not completed yet
@ -68,14 +68,14 @@ class Popen3:
_active.remove(self)
return self.sts
def popen2(cmd):
def popen2(cmd, bufsize=-1):
_cleanup()
inst = Popen3(cmd, 0)
inst = Popen3(cmd, 0, bufsize)
return inst.fromchild, inst.tochild
def popen3(cmd):
def popen3(cmd, bufsize=-1):
_cleanup()
inst = Popen3(cmd, 1)
inst = Popen3(cmd, 1, bufsize)
return inst.fromchild, inst.tochild, inst.childerr
def _test():