1 07/30/86  Virtual entries (general information)
 2 
 3 The cv_entry_ subroutine converts a character string into a Multics
 4 entry value.  Altogether nine forms are accepted.  The command
 5 processor performs a similar transformation to the command name to
 6 derive the command's entry, but only accepts five of the forms.
 7 
 8 
 9 List of virtual entries:
10 refname$entrypoint
11    The entry at the word identified by the definition named entrypoint
12    in the object file found using search rules to find refname.  The
13    refname follows the rules for entrynames, but entrypoint can be up
14    to 254 characters in length.
15 refname
16    The same as refname$refname.
17 refname$offset
18    The entry at the word identified by octal offset in the object file
19    found using search rules to find refname.  The command processor
20    doesn't distinguish this case from refname$entrypoint.
21 refname$
22    same as ref_name$0.  The command processor also uses a zero offset.
23 
24 
25 path$entrypoint
26    The entry at the word identified by the definition named entrypoint
27    in the object file identified by path.  In this case, path is
28    distinguished from the refname case by containing less-than (<) or
29    greater-than (>) characters.
30 path
31    The same as path$entrypoint, except that the word is identified by
32    the definition named by the final entryname in the expanded form of
33    path.
34 path|entrypoint
35    The same as path$entrypoint, but in this case, the vertical-bar
36    causes the interpretatation of the preceding string as a path, so no
37    less-than or greater-than is needed as in the dollar sign case.
38    Note that the command processor does not recognize the vertical-bar
39    as a virtual entry delimiter.
40 
41 
42 path|offset
43    The entry at the word identified by the octal offset in the object
44    file identified by path.
45 path|
46    The same as path|0.
47 
48 
49 Notes: Converting a character string to a entry value will initiate the
50 object file with the refname or the final entryname of the expanded
51 path if the file was not previously initiated or the name was not a
52 refname of the segment.  This can also result in the termination of the
53 refname if it was previously associated with another segment.
54 
55 
56 For more information about entrynames, see entryname.gi.info.  For more
57 information about pathnames, see pathname.gi.info.