Mercurial > cpython-lru_cache-weakref

annotate Doc/lib/libamoeba.tex @ 5817:48b94de85bf3 legacy-trunk

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Extensive changes by AMK.
author Guido van Rossum <guido@python.org>
date Thu, 17 Jul 1997 16:29:42 +0000
parents 7ef72873e4d6
children 3468ea8645ca
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2609
7ef72873e4d6 restructured library manual accordiung to functional group
Guido van Rossum <guido@python.org>
parents: 2576
diff changeset
1 \chapter{Amoeba Specific Services}
1471
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
2
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
3 \section{Built-in Module \sectcode{amoeba}}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
4
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
5 \bimodindex{amoeba}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
6 This module provides some object types and operations useful for
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
7 Amoeba applications. It is only available on systems that support
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
8 Amoeba operations. RPC errors and other Amoeba errors are reported as
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
9 the exception \code{amoeba.error = 'amoeba.error'}.
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
10
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
11 The module \code{amoeba} defines the following items:
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
12
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
13 \renewcommand{\indexsubitem}{(in module amoeba)}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
14 \begin{funcdesc}{name_append}{path\, cap}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
15 Stores a capability in the Amoeba directory tree.
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
16 Arguments are the pathname (a string) and the capability (a capability
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
17 object as returned by
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
18 \code{name_lookup()}).
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
19 \end{funcdesc}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
20
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
21 \begin{funcdesc}{name_delete}{path}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
22 Deletes a capability from the Amoeba directory tree.
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
23 Argument is the pathname.
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
24 \end{funcdesc}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
25
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
26 \begin{funcdesc}{name_lookup}{path}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
27 Looks up a capability.
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
28 Argument is the pathname.
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
29 Returns a
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
30 \dfn{capability}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
31 object, to which various interesting operations apply, described below.
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
32 \end{funcdesc}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
33
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
34 \begin{funcdesc}{name_replace}{path\, cap}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
35 Replaces a capability in the Amoeba directory tree.
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
36 Arguments are the pathname and the new capability.
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
37 (This differs from
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
38 \code{name_append()}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
39 in the behavior when the pathname already exists:
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
40 \code{name_append()}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
41 finds this an error while
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
42 \code{name_replace()}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
43 allows it, as its name suggests.)
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
44 \end{funcdesc}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
45
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
46 \begin{datadesc}{capv}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
47 A table representing the capability environment at the time the
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
48 interpreter was started.
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
49 (Alas, modifying this table does not affect the capability environment
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
50 of the interpreter.)
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
51 For example,
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
52 \code{amoeba.capv['ROOT']}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
53 is the capability of your root directory, similar to
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
54 \code{getcap("ROOT")}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
55 in C.
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
56 \end{datadesc}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
57
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
58 \begin{excdesc}{error}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
59 The exception raised when an Amoeba function returns an error.
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
60 The value accompanying this exception is a pair containing the numeric
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
61 error code and the corresponding string, as returned by the C function
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
62 \code{err_why()}.
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
63 \end{excdesc}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
64
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
65 \begin{funcdesc}{timeout}{msecs}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
66 Sets the transaction timeout, in milliseconds.
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
67 Returns the previous timeout.
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
68 Initially, the timeout is set to 2 seconds by the Python interpreter.
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
69 \end{funcdesc}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
70
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
71 \subsection{Capability Operations}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
72
2576
f47bc5554418 mass changes; fix titles; add examples; correct typos; clarifications;
Guido van Rossum <guido@python.org>
parents: 1471
diff changeset
73 Capabilities are written in a convenient \ASCII{} format, also used by the
1471
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
74 Amoeba utilities
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
75 {\it c2a}(U)
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
76 and
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
77 {\it a2c}(U).
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
78 For example:
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
79
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
80 \bcode\begin{verbatim}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
81 >>> amoeba.name_lookup('/profile/cap')
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
82 aa:1c:95:52:6a:fa/14(ff)/8e:ba:5b:8:11:1a
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
83 >>>
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
84 \end{verbatim}\ecode
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
85
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
86 The following methods are defined for capability objects.
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
87
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
88 \renewcommand{\indexsubitem}{(capability method)}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
89 \begin{funcdesc}{dir_list}{}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
90 Returns a list of the names of the entries in an Amoeba directory.
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
91 \end{funcdesc}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
92
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
93 \begin{funcdesc}{b_read}{offset\, maxsize}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
94 Reads (at most)
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
95 \var{maxsize}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
96 bytes from a bullet file at offset
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
97 \var{offset.}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
98 The data is returned as a string.
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
99 EOF is reported as an empty string.
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
100 \end{funcdesc}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
101
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
102 \begin{funcdesc}{b_size}{}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
103 Returns the size of a bullet file.
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
104 \end{funcdesc}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
105
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
106 \begin{funcdesc}{dir_append}{}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
107 \funcline{dir_delete}{}\
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
108 \funcline{dir_lookup}{}\
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
109 \funcline{dir_replace}{}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
110 Like the corresponding
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
111 \samp{name_}*
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
112 functions, but with a path relative to the capability.
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
113 (For paths beginning with a slash the capability is ignored, since this
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
114 is the defined semantics for Amoeba.)
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
115 \end{funcdesc}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
116
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
117 \begin{funcdesc}{std_info}{}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
118 Returns the standard info string of the object.
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
119 \end{funcdesc}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
120
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
121 \begin{funcdesc}{tod_gettime}{}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
122 Returns the time (in seconds since the Epoch, in UCT, as for POSIX) from
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
123 a time server.
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
124 \end{funcdesc}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
125
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
126 \begin{funcdesc}{tod_settime}{t}
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
127 Sets the time kept by a time server.
2ec96140a36b Restructured library documentation
Guido van Rossum <guido@python.org>
parents:
diff changeset
128 \end{funcdesc}