OS_FSControl 11 (changes)
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Programmer's OS Reference SWI Manuals Calls
» Part OS_FSControl 15 – SWI Calls
» OS_FSControl 11OS
» OS_FSControl
» OS_FSControl 11
OS_ FSControl 11
(SWI &29)
| Entry | |
|---|---|
| R0 | 11 (&0B) |
| R1 | Pointer to (wildcarded) filename |
| Exit | |
|---|---|
| R0 | Preserved |
| R1 | Updated to point beyond filing system specifier |
| R2 | If -1 then no filing system specifier present (call has no effect) |
| If >= 0 then filing system number to restore | |
| R3 | Pointer to special field, 0 if not present |
Use
The purpose of this call is set the temporary filing system from the prefix string in R1.
Notes
It is used by OS_CLI to set the temporary filing system for the command’s duration. After the command the current filing system is restored with OS_FSControl 19.
Examples
| R1 Pointer to | Registers out |
|---|---|
| blah.blah vlsgf | R1 = R1 in |
| R2 = -1 | |
| R3 = 0 | |
| <FS>:blah | R1 past ‘:’ |
| R2 = <number of filing system | |
| R3 = 0 | |
| <FS>#fred:blah | R1 past ‘:’ |
| R2 = <number of filing system | |
| R3 past ‘#’ | |
| <path>:blah | R1 = R1 in |
| R2 = -1 | |
| R3 = 0 | |
| <path>#fred:blah | R1 = R1 in |
| R2 = -1 | |
| R3 past ‘#’ | |
| #fred:blah | R1 = R1 in |
| R2 = -1 | |
| R3 past ‘#’ |
See also
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