diff options
Diffstat (limited to 'Doc/lib/libos.tex')
| -rw-r--r-- | Doc/lib/libos.tex | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/Doc/lib/libos.tex b/Doc/lib/libos.tex index 9ded3ae0ca..7844028a62 100644 --- a/Doc/lib/libos.tex +++ b/Doc/lib/libos.tex @@ -361,6 +361,10 @@ object, except that when the exit status is zero (termination without errors), \code{None} is returned. Availability: Macintosh, \UNIX, Windows. +The \module{subprocess} module provides more powerful facilities for +spawning new processes and retrieving their results; using that module +is preferable to using this function. + \versionchanged[This function worked unreliably under Windows in earlier versions of Python. This was due to the use of the \cfunction{_popen()} function from the libraries provided with @@ -375,8 +379,13 @@ deleted once there are no file descriptors for the file. Availability: Macintosh, \UNIX, Windows. \end{funcdesc} +There are a number of different \function{popen*()} functions that +provide slightly different ways to create subprocesses. Note that the +\module{subprocess} module is easier to use and more powerful; +consider using that module before writing code using the +lower-level \function{popen*()} functions. -For each of the following \function{popen()} variants, if \var{bufsize} is +For each of the \function{popen*()} variants, if \var{bufsize} is specified, it specifies the buffer size for the I/O pipes. \var{mode}, if provided, should be the string \code{'b'} or \code{'t'}; on Windows this is needed to determine whether the file @@ -1545,7 +1554,13 @@ functions are described in section \ref{os-newstreams}. \funcline{spawnve}{mode, path, args, env} \funcline{spawnvp}{mode, file, args} \funcline{spawnvpe}{mode, file, args, env} -Execute the program \var{path} in a new process. If \var{mode} is +Execute the program \var{path} in a new process. + +(Note that the \module{subprocess} module provides more powerful +facilities for spawning new processes and retrieving their results; +using that module is preferable to using these functions.) + +If \var{mode} is \constant{P_NOWAIT}, this function returns the process ID of the new process; if \var{mode} is \constant{P_WAIT}, returns the process's exit code if it exits normally, or \code{-\var{signal}}, where @@ -1682,6 +1697,10 @@ and XP) this is the exit status of the command run; on systems using a non-native shell, consult your shell documentation. Availability: Macintosh, \UNIX, Windows. + +The \module{subprocess} module provides more powerful facilities for +spawning new processes and retrieving their results; using that module +is preferable to using this function. \end{funcdesc} \begin{funcdesc}{times}{} |