mirror of
https://github.com/python/cpython.git
synced 2024-11-25 01:20:47 +01:00
36 lines
743 B
Python
36 lines
743 B
Python
|
import os
|
||
|
|
import sys
|
||
|
|
import string
|
||
|
|
|
||
|
|
MAXFD = 100 # Max number of file descriptors (os.getdtablesize()???)
|
||
|
|
|
||
|
|
def popen2(cmd):
|
||
|
|
cmd = string.split(cmd)
|
||
|
|
p2cread, p2cwrite = os.pipe()
|
||
|
|
c2pread, c2pwrite = os.pipe()
|
||
|
|
pid = os.fork()
|
||
|
|
if pid == 0:
|
||
|
|
# Child
|
||
|
|
os.close(0)
|
||
|
|
os.close(1)
|
||
|
|
if os.dup(p2cread) <> 0:
|
||
|
|
sys.stderr.write('popen2: bad read dup\n')
|
||
|
|
if os.dup(c2pwrite) <> 1:
|
||
|
|
sys.stderr.write('popen2: bad write dup\n')
|
||
|
|
for i in range(3, MAXFD):
|
||
|
|
try:
|
||
|
|
os.close(i)
|
||
|
|
except:
|
||
|
|
pass
|
||
|
|
try:
|
||
|
|
os.execv(cmd[0], cmd)
|
||
|
|
finally:
|
||
|
|
os._exit(1)
|
||
|
|
# Shouldn't come here, I guess
|
||
|
|
os._exit(1)
|
||
|
|
os.close(p2cread)
|
||
|
|
tochild = os.fdopen(p2cwrite, 'w')
|
||
|
|
os.close(c2pwrite)
|
||
|
|
fromchild = os.fdopen(c2pread, 'r')
|
||
|
|
return fromchild, tochild
|