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Diffstat (limited to 'Doc/lib/libos.tex')
| -rw-r--r-- | Doc/lib/libos.tex | 51 |
1 files changed, 39 insertions, 12 deletions
diff --git a/Doc/lib/libos.tex b/Doc/lib/libos.tex index 5109f5d..51442ef 100644 --- a/Doc/lib/libos.tex +++ b/Doc/lib/libos.tex @@ -26,9 +26,11 @@ In addition to whatever the correct OS dependent module exports, the following variables and functions are always exported by \code{os}: \renewcommand{\indexsubitem}{(in module os)} + \begin{datadesc}{name} -The name of the OS dependent module imported, e.g. \code{'posix'} or -\code{'mac'}. +The name of the OS dependent module imported. The following names +have currently been registered: \code{'posix'}, \code{'nt'}, +\code{'dos'}, \code{'mac'}. \end{datadesc} \begin{datadesc}{path} @@ -49,29 +51,54 @@ e.g. \code{'..'} for POSIX or \code{'::'} for the Mac. \end{datadesc} \begin{datadesc}{sep} -The character used by the OS to separate pathname components, e.g. +The character used by the OS to separate pathname components, e.g.\ \code{'/'} for POSIX or \code{':'} for the Mac. Note that knowing this is not sufficient to be able to parse or concatenate pathnames---better use \code{os.path.split()} and \code{os.path.join()}---but it is occasionally useful. \end{datadesc} +\begin{datadesc}{pathsep} +The character conventionally used by the OS to separate search patch +components (as in \code{\$PATH}), e.g.\ \code{':'} for POSIX or +\code{';'} for MS-DOS. +\end{datadesc} + +\begin{datadesc}{defpath} +The default search path used by \code{os.exec*p*()} if the environment +doesn't have a \code{'PATH'} key. +\end{datadesc} + \begin{funcdesc}{execl}{path\, arg0\, arg1\, ...} -This is equivalent to a call to \code{os.execv} with an \var{argv} -of \code{[\var{arg0}, \var{arg1}, ...]}. +This is equivalent to +\code{os.execv(\var{path}, (\var{arg0}, \var{arg1}, ...))}. \end{funcdesc} \begin{funcdesc}{execle}{path\, arg0\, arg1\, ...\, env} -This is equivalent to a call to \code{os.execve} with an \var{argv} -of \code{[\var{arg0}, \var{arg1}, ...]}. +This is equivalent to +\code{os.execve(\var{path}, (\var{arg0}, \var{arg1}, ...), \var{env})}. \end{funcdesc} \begin{funcdesc}{execlp}{path\, arg0\, arg1\, ...} -This is like \code{execl} but duplicates the shell's actions in -searching for an executable file in a list of directories. The -directory list is obtained from \code{environ['PATH']}. +This is equivalent to +\code{os.execvp(\var{path}, (\var{arg0}, \var{arg1}, ...))}. +\end{funcdesc} + +\begin{funcdesc}{execvp}{path\, args} +This is like \code{os.execv(\var{path}, \var{args})} but duplicates +the shell's actions in searching for an executable file in a list of +directories. The directory list is obtained from +\code{os.environ['PATH']}. \end{funcdesc} -\begin{funcdesc}{execvp}{path\, arg0\, arg1\, ...} -\code{execvp} is for \code{execv} what \code{execlp} is for \code{execl}. +\begin{funcdesc}{execvpe}{path\, args\, env} +This is a cross between \code{os.execve()} and \code{os.execvp()}. +The directory list is obtained from \code{\var{env}['PATH']}. \end{funcdesc} + +(The functions \code{os.execv()} and \code{execve()} are not +documented here, since they are implemented by the OS dependent +module. If the OS dependent module doesn't define either of these, +the functions that rely on it will raise an exception. They are +documented in the section on module \code{posix}, together with all +other functions that \code{os} imports from the OS dependent module.) |