Electric Drives
and Controls
8−7Bosch Rexroth AGRhoMotion1070072367 / 04
File management
8.3 File attributes
The attributes (eg read, write) of the files specify which actions (eg rea-
ding, writing) are permitted on the file concerned. Here a set attribute
corresponds to the ”permission” for this action. That is to say, files with
the read attribute may be read, for example. Or files without the write at-
tribute cannot be written to.
The following attributes are available:
read (R) Read authorization
write (W) Write authorization
delete (D) Delete authorization
hidden (H) Hidden files
system (S) System files
A file may have multiple attributes. When it is created a file has all attribu-
tes (RWD), i.e. everything is permitted.
The table below lists which actions demand which attribute:
read write delete
list X -- --
read X -- --
write -- X --
delete X X X
rename -- X --
copy X -- --
execute X X --
X = attribute required
-- = no effect
The system and hidden attributes are a special case. Files with one of
these attributes are not displayed by the controller, i.e. these files are
hidden. Access to these files, e.g. execution, is not, however, restricted.
The system and hidden attributes are password-protected.
The attributes are not copied when files are copied. This means that the
copy is assigned all attributes (R, W, D).
Exception: Files created by a hidden process ’inherit’ the hidden attri-
bute of this process.
Processes can modify the attributes of files with the function rFChmod().
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