R Under development (unstable) (2024-12-05 r87423 ucrt) -- "Unsuffered Consequences"
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> message("*** backup() ...")
*** backup() ...
> 
> pathname <- tempfile()
> cat("Hello", file = pathname)
> stopifnot(file.exists(pathname))
> pathname_backup <- startup:::backup(pathname)
Backed up R startup file: 'D:\temp\2024_12_08_00_50_01_29417\RtmpOOuHgN\file203e0641060bc' (5 bytes) -> 'D:\temp\2024_12_08_00_50_01_29417\RtmpOOuHgN\file203e0641060bc.bak.20241208-005304' (5 bytes)
> print(pathname_backup)
[1] "D:\\temp\\2024_12_08_00_50_01_29417\\RtmpOOuHgN\\file203e0641060bc.bak.20241208-005304"
> stopifnot(file.exists(pathname), file.exists(pathname_backup))
> 
> message("*** backup() ... DONE")
*** backup() ... DONE
> 
> proc.time()
   user  system elapsed 
   0.10    0.06    0.15