Open System Services System Calls Reference Manual (G06.29+, H06.08+, J06.03+)

Miscellaneous filename(5)
• Unnamed processes
The type of object determines the syntax for the Guardian filename and which subset of the per-
mitted characters is allowed in the parts of that filename.
For a disk file, the Guardian filename consists of the following four parts, separated by periods:
node name A character string of two to eight valid characters, specifying the node within the
NonStop server Expand network. The first character must be a backslash (\).
Valid characters for the rest of the string are the letters A through Z and the
digits 0 through 9. The second character must be a letter.
volume name A character string of two to eight valid characters, specifying the disk volume
containing the file. The first character must be a dollar sign ($). Valid characters
for the rest of the string are the letters A through Z and the digits 0 through 9.
The second character must be a letter.
subvolume name
A character string of up to eight valid characters, specifying the disk subvolume
(prefix) of the file identifier. Valid characters are the letters A through Z and the
digits 0 through 9. The first character must be a letter.
file identifier A character string of up to eight valid characters, specifying the file. Valid char-
acters are the letters A through Z and the digits 0 through 9. The first character
must be a letter.
For a temporary disk file, the Guardian filename consists of the following three parts, separated
by periods:
node name A character string of two to eight valid characters, specifying the node within the
NonStop server Expand network. The first character must be a backslash (\).
Valid characters for the rest of the string are the letters A through Z and the
digits 0 through 9. The second character must be a letter.
volume name A character string of two to eight valid characters, specifying the disk volume
containing the file. The first character must be a dollar sign ($). Valid characters
for the rest of the string are the letters A through Z and the digits 0 through 9.
The second character must be a letter.
temporary file identifier
A character string of two to eight valid characters, specifying the file. The first
character must be a number sign (#). Valid characters for the rest of the string
are the digits 0 through 9.
For a nondisk device, the Guardian filename consists of the following three parts, separated by
periods:
node name A character string of two to eight valid characters, specifying the node within the
NonStop server Expand network. The first character must be a backslash (\).
Valid characters for the rest of the string are the letters A through Z and the
digits 0 through 9. The second character must be a letter.
device name A character string of two to eight valid characters, specifying the name of the
process providing the interface to the device. The first character must be a dollar
sign ($). Valid characters for the rest of the string are the letters A through Z and
the digits 0 through 9. The second character must be a letter.
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