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PalmBeach | ||||
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PSION Link Protocol description | ||||
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RFSV Protocol description | ||||
To change the command CHANGEDIR used around the path. By this command an implementation does not need to know, how the separator is constituted in a hierarchical file system.
It is to be noted that; all values, which are more greater than 8 bits in reverse order will transfer. The LOW byte sent as the first over the line and only then follows the HIGH byte!
The instruction CHANGEDIR has two different developments. In the first version it has a parameter fewer. The parameter "Ordnername" is "Mode" dependent on the parameter;. Is the value of "Mode" CD_SUBDIR (00 03), then the second version is used.
The first version serves to change into the ROOT directory, or into the parent list.
| Header | PLP | RFSV-CHANGEDIR version 1 | Footer | CRC | |||
|---|---|---|---|---|---|---|---|
| 16 10 02 | 32 03 02 01 | Command 26 00 |
Size 23 00 |
Mode 01 00 |
Path name "REM::M:\TEMP" |
10 03 | 12 34 |
The second version is used, if it is to be more deeply changed into a directory.
| Header | PLP | RFSV-CHANGEDIR version 2 | Footer | CRC | ||||
|---|---|---|---|---|---|---|---|---|
| 16 10 02 | 32 03 02 01 | Command 26 00 |
Size 23 00 |
Mode 03 00 |
Path name "REM::M:\TEMP" |
File name "ABD" |
10 03 | 12 34 |
A valid response takes place with the command RESPONSE and returns the delivery an error code, as well as the path, which developed from the directory change.
| Header | PLP | RFSV-RESPONSE | Footer | CRC | |||
|---|---|---|---|---|---|---|---|
| 16 10 02 | 33 02 03 01 | Command 2a 00 |
Size 25 00 |
Result 00 00 |
Path name "REM::M:\TEMP\ABD" |
10 03 | 12 34 |
| bold | Values represent fixed of values, which are used accurately in such a way! |
| italic | Values represent examples, which have a different meaning on the basis the instruction. |
The command CHANGEDIR consists of 5 information units. These have the following meanings:
| Length in byte | possible values | Meaning | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Command | 2 byte | 00 26 (fixed) | The command identifier has always the same value! | |||||||||
| Size | 2 byte | variable | Since the path name with is transmitted, the value of the length of the path name, needed here, depends! The final 0-Byte is to be considered with the length. | |||||||||
| Mode | 2 byte | variable | The mode indicates, how the new directory is to be calculated.
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| Path name | 1 byte or more | 0-terminated string | The path name is to be transmitted, from which is to be changed. | |||||||||
| File name | 1 byte or more | 0-terminated string | This parameter exists only, if it is "Mode" CD_SUBDIR. This parameter indicates the file, into which is to be changed. |
The command CHANGEDIR is answered with RESPONSE. This supplies an error code as result and in case of success a path name, which to the corresponds to target path after CHANGEDIR would have been also executed.
| Length in byte | possible values | Meaning | ||||
|---|---|---|---|---|---|---|
| Command | 2 byte | 00 2a (fixed) | The command identifier has always the same value! | |||
| Size | 2 byte | variable | The length depends on the returned the delivery path name. | |||
| Result | 2 byte | variable | The result can obtain the following values:
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| Path name | 2 byte | 0-terminated string | The path name is supplied, which would develop after the change, if it is executed as indicated in the command. This file must not exist! |
|
Michael Piepers homepage | ||||
|
BeOS Programs | ||||
|
PalmBeach | ||||
|
PSION Link Protocol description | ||||
|
RFSV Protocol description | ||||