diff options
Diffstat (limited to 'Lib')
| -rw-r--r-- | Lib/popen2.py | 35 |
1 files changed, 25 insertions, 10 deletions
diff --git a/Lib/popen2.py b/Lib/popen2.py index 73ff77c..c4d3e4c 100644 --- a/Lib/popen2.py +++ b/Lib/popen2.py @@ -89,9 +89,14 @@ class Popen3: _active.remove(self) return self.sts -try: - from os import popen2 -except NameError: +if hasattr(os, "popen2"): + 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.""" + w, r = os.popen2(cmd, mode, bufsize) + return r, w +else: 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 @@ -104,9 +109,14 @@ except NameError: inst = Popen3(cmd, 0, bufsize) return inst.fromchild, inst.tochild -try: - from os import popen3 -except NameError: +if hasattr(os, "popen3"): + 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.""" + w, r, e = os.popen3(cmd, mode, bufsize) + return r, w, e +else: 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 @@ -119,10 +129,15 @@ except NameError: inst = Popen3(cmd, 1, bufsize) return inst.fromchild, inst.tochild, inst.childerr -try: - from os import popen4 -except NameError: - pass # not on unix +if hasattr(os, "popen4"): + def popen4(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_stderr, child_stdin) are returned.""" + w, r = os.popen4(cmd, mode, bufsize) + return r, w +else: + pass # not yet on unix def _test(): teststr = "abc\n" |