diff options
Diffstat (limited to 'Doc')
| -rw-r--r-- | Doc/lib/libos.tex | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/Doc/lib/libos.tex b/Doc/lib/libos.tex index 074d332..229342f 100644 --- a/Doc/lib/libos.tex +++ b/Doc/lib/libos.tex @@ -1514,11 +1514,19 @@ Execute the command (a string) in a subshell. This is implemented by calling the Standard C function \cfunction{system()}, and has the same limitations. Changes to \code{posix.environ}, \code{sys.stdin}, etc.\ are not reflected in the environment of the executed command. -The return value is the exit status of the process encoded in the -format specified for \function{wait()}, except on Windows 95 and 98, -where it is always \code{0}. Note that \POSIX{} does not specify the -meaning of the return value of the C \cfunction{system()} function, -so the return value of the Python function is system-dependent. + +On \UNIX the return value is the exit status of the process encoded in the +format specified for \function{wait()}. Note that \POSIX{} does not +specify the meaning of the return value of the C \cfunction{system()} +function, so the return value of the Python function is system-dependent. + +On Windows the return value is that returned by the system shell after +running \var{command}, given by the Windows environment variable +\code{COMSPEC}: on \code{command.com} systems (Windows 95, 98 and ME) +this is always \code{0}; on \code{cmd.exe} systems (Windows NT, 2000 +and XP) this is the exit status of the command run; on systems using +a non-native shell, consult your shell documentation. + Availability: \UNIX, Windows. \end{funcdesc} |