Guardian Procedure Calls Reference Manual (G06.25+)

File Names and Process Identifiers
Guardian Procedure Calls Reference Manual—522629-013
D-6
Process Descriptors
Process Descriptors
A process descriptor is a form of process file name that always includes the node and
seq-no sections of the name; when identifying a named process, it never includes the
optional qualifiers
qual-1 or qual-2. Guardian 90 procedures always return a
process descriptor as the external-form representation of a process or process pair.
The following are examples of process descriptors:
\node5.$zproc:1622091078
\east.$:5:131:436612
File-Name Patterns
A file-name pattern resembles a file name but designates a set of entities (that is, a set
of disk files, devices, processes, or systems) through the use of pattern-matching
characters. The pattern-matching characters are:
* An asterisk matches zero or more letters, digits, dollar signs, pound signs,
or a combination of these.
? A question mark matches exactly one letter, digit, dollar sign, or pound
sign.
The syntax for a file-name pattern is:
pattern
consists of one or more characters. Allowable characters are letters, digits, pound
signs (#), asterisks (*), and question marks (?). The maximum length of a
pattern is twice that of the corresponding portion of a file name. (For example,
16 characters is allowed for a
pattern that corresponds to a subvolume portion.
This allows you to interleave multiple asterisks with a set of fixed characters.)
The all-numeric portions of a file name (that is, the
seq-no, cpu, and pin portions
of process file names) cannot be represented by
pattern.
This syntax allows combinations of characters that are not permitted in file names,
such as the use of pound signs anywhere in any portion. However, using such a
combination of characters means that the pattern cannot designate any entity.
Note that the dollar sign is allowed only in the second form of the file-name pattern, as
shown in the diagram above. The presence or absence of the dollar sign determines
\pattern
or
[\pattern.]$pattern[.pattern[.pattern]]
or
[\pattern.][[pattern.]pattern.]pattern