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author | Guido van Rossum <guido@python.org> | 1994-01-02 01:22:07 (GMT) |
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committer | Guido van Rossum <guido@python.org> | 1994-01-02 01:22:07 (GMT) |
commit | 5fdeeeae2a12b9956cc84d62eae82f72cabc8664 (patch) | |
tree | ac0053479e10099850c8e0d06e31cb3afbf632bb /Doc/lib/libamoeba.tex | |
parent | 0b0719866e8a32d0a787e73bca9e79df1d1a74f8 (diff) | |
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Restructured library documentation
Diffstat (limited to 'Doc/lib/libamoeba.tex')
-rw-r--r-- | Doc/lib/libamoeba.tex | 128 |
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diff --git a/Doc/lib/libamoeba.tex b/Doc/lib/libamoeba.tex new file mode 100644 index 0000000..db4fefd --- /dev/null +++ b/Doc/lib/libamoeba.tex @@ -0,0 +1,128 @@ +\chapter{AMOEBA ONLY} + +\section{Built-in Module \sectcode{amoeba}} + +\bimodindex{amoeba} +This module provides some object types and operations useful for +Amoeba applications. It is only available on systems that support +Amoeba operations. RPC errors and other Amoeba errors are reported as +the exception \code{amoeba.error = 'amoeba.error'}. + +The module \code{amoeba} defines the following items: + +\renewcommand{\indexsubitem}{(in module amoeba)} +\begin{funcdesc}{name_append}{path\, cap} +Stores a capability in the Amoeba directory tree. +Arguments are the pathname (a string) and the capability (a capability +object as returned by +\code{name_lookup()}). +\end{funcdesc} + +\begin{funcdesc}{name_delete}{path} +Deletes a capability from the Amoeba directory tree. +Argument is the pathname. +\end{funcdesc} + +\begin{funcdesc}{name_lookup}{path} +Looks up a capability. +Argument is the pathname. +Returns a +\dfn{capability} +object, to which various interesting operations apply, described below. +\end{funcdesc} + +\begin{funcdesc}{name_replace}{path\, cap} +Replaces a capability in the Amoeba directory tree. +Arguments are the pathname and the new capability. +(This differs from +\code{name_append()} +in the behavior when the pathname already exists: +\code{name_append()} +finds this an error while +\code{name_replace()} +allows it, as its name suggests.) +\end{funcdesc} + +\begin{datadesc}{capv} +A table representing the capability environment at the time the +interpreter was started. +(Alas, modifying this table does not affect the capability environment +of the interpreter.) +For example, +\code{amoeba.capv['ROOT']} +is the capability of your root directory, similar to +\code{getcap("ROOT")} +in C. +\end{datadesc} + +\begin{excdesc}{error} +The exception raised when an Amoeba function returns an error. +The value accompanying this exception is a pair containing the numeric +error code and the corresponding string, as returned by the C function +\code{err_why()}. +\end{excdesc} + +\begin{funcdesc}{timeout}{msecs} +Sets the transaction timeout, in milliseconds. +Returns the previous timeout. +Initially, the timeout is set to 2 seconds by the Python interpreter. +\end{funcdesc} + +\subsection{Capability Operations} + +Capabilities are written in a convenient ASCII format, also used by the +Amoeba utilities +{\it c2a}(U) +and +{\it a2c}(U). +For example: + +\bcode\begin{verbatim} +>>> amoeba.name_lookup('/profile/cap') +aa:1c:95:52:6a:fa/14(ff)/8e:ba:5b:8:11:1a +>>> +\end{verbatim}\ecode + +The following methods are defined for capability objects. + +\renewcommand{\indexsubitem}{(capability method)} +\begin{funcdesc}{dir_list}{} +Returns a list of the names of the entries in an Amoeba directory. +\end{funcdesc} + +\begin{funcdesc}{b_read}{offset\, maxsize} +Reads (at most) +\var{maxsize} +bytes from a bullet file at offset +\var{offset.} +The data is returned as a string. +EOF is reported as an empty string. +\end{funcdesc} + +\begin{funcdesc}{b_size}{} +Returns the size of a bullet file. +\end{funcdesc} + +\begin{funcdesc}{dir_append}{} +\funcline{dir_delete}{}\ +\funcline{dir_lookup}{}\ +\funcline{dir_replace}{} +Like the corresponding +\samp{name_}* +functions, but with a path relative to the capability. +(For paths beginning with a slash the capability is ignored, since this +is the defined semantics for Amoeba.) +\end{funcdesc} + +\begin{funcdesc}{std_info}{} +Returns the standard info string of the object. +\end{funcdesc} + +\begin{funcdesc}{tod_gettime}{} +Returns the time (in seconds since the Epoch, in UCT, as for POSIX) from +a time server. +\end{funcdesc} + +\begin{funcdesc}{tod_settime}{t} +Sets the time kept by a time server. +\end{funcdesc} |