[Python-bugs-list] [ python-Bugs-602245 ] os.popen() negative error code IOError

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Bugs item #602245, was opened at 2002-08-30 06:25
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=602245&group_id=5470

Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Tim Delaney (tcdelaney)
Assigned to: Nobody/Anonymous (nobody)
Summary: os.popen() negative error code IOError

Initial Comment:
Windows 2000, Python 2.0.1, 2.1.1, 2.2.

When a negative return code is received by the os.popen
() family, an IOError is raised when the last pipe from the 
process is closed.

The following code demonstrates the problem:

import sys
import os
import traceback

if __name__ == '__main__':

    if len(sys.argv) == 1:
        
        try:
            r = os.popen('%s %s %s' % (sys.executable, 
sys.argv[0], -1,))
            r.close()
        except IOError:
            traceback.print_exc()

        try:
            w, r = os.popen2('%s %s %s' % 
(sys.executable, sys.argv[0], -1,))
            w.close()
            r.close()
        except IOError:
            traceback.print_exc()

        try:
            w, r, e = os.popen3('%s %s %s' % 
(sys.executable, sys.argv[0], -1,))
            w.close()
            r.close()
            e.close()
        except IOError:
            traceback.print_exc()

    else:
        sys.exit(int(sys.argv[1]))

---------- Run ----------
Traceback (most recent call last):
  File "Q:\Viper\src\webvis\tests\test.py", line 11, in ?
    r.close()
IOError: (0, 'Error')
Traceback (most recent call last):
  File "Q:\Viper\src\webvis\tests\test.py", line 18, in ?
    r.close()
IOError: (0, 'Error')
Traceback (most recent call last):
  File "Q:\Viper\src\webvis\tests\test.py", line 26, in ?
    e.close()
IOError: (0, 'Error')


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