Home#include <lua/unistd.lh>
- offset = handle:seek(offset, whence)
- offset = handle:tell()
SYNOPSIS
DESCRIPTION
rawio:seek() moves the offset of the file pointer according to the directive whence as follows:
| SEEK_SET or "set" | The offset is set to offset bytes. |
| SEEK_CUR or "cur" | The offset is set to the current location plus offset bytes. |
| SEEK_END or "end" | The offset is set to the length of the file plus offset bytes. |
rawio:tell() is used to read the current file position. It is synonymous to rawio:seek(0, SEEK_CUR).
RETURN VALUE
On success, returns the file offset after the command has completed. On failure, returns
nil. In case of an error, the error can be retrieved using rawio:lastError().
EXAMPLE
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handle = rawio.open("/tmp/test.txt", rawio.rdwr | rawio.creat)
print(handle:tell())
handle:write("HUllo World!")
print(handle:seek(1, "set"))
handle:write("e")
print(handle:tell())
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