[SR-14823] macOS and Linux file length requirements differ for Data's write(to:options) method #3954
Description
| Previous ID | SR-14823 |
| Radar | rdar://problem/80384586 |
| Original Reporter | amigi (JIRA User) |
| Type | Bug |
Additional Detail from JIRA
| Votes | 0 |
| Component/s | Foundation |
| Labels | Bug |
| Assignee | @millenomi |
| Priority | Medium |
md5: 6df37eef7bfa36cca485fbbe01e38053
Issue Description:
On macOS the max filename length to pass to `Data`'s `write(to:options🙂` method is 255 bytes. However, the limit on Linux currently is 244 bytes.
Looking at https://github.com/apple/swift-corelibs-foundation/blob/main/Sources/Foundation/NSPathUtilities.swift#L738, we create the template temporary file name like so:
```swift
let template = filePath + ".tmp.XXXXXX"
```
Instead of using `filePath` directly, we should check to see if extends past a certain length, then truncate the length of the string by enough characters to fit inside the 255 byte limit. This will allow the input path be up to 255 bytes, while the temporary file is also under the 255 byte limit.