Re^2: Yet another config file editing programme : Tell me how to make it better !

There is a very small, but finite risk of the Pi being turned off in the middle of a file write

Ha ha, I have long experience contemplating this annoying and tricky problem! The straightforward solution I concocted back in 2003 (and am still happy with) is to simply write a new file on the same file system ... and then use (atomic) rename to clobber the original file - but only after the new file has been successfully written. This is described in detail at:

Re-runnably editing a file in place (see also its References Added Later section - especially CPAN module File::Replace by haukex)

Comment on Re^2: Yet another config file editing programme : Tell me how to make it better !

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Re^3: Yet another config file editing programme : Tell me how to make it better ! by tybalt89 (Monsignor) on Sep 03, 2021 at 09:32 UTC
See ->spew (and ->edit and ->edit_lines) in Path::Tiny	[reply]
Re^4: Yet another config file editing programme : Tell me how to make it better ! by eyepopslikeamosquito (Archbishop) on Sep 03, 2021 at 10:09 UTC
From Path::Tiny's doco of its excellently named `spew` method: "The file is written to a temporary file in the same directory, then renamed over the original.". Hey, xdg stole my idea! Seriously, it looks like an excellent module, I should start using it ... especially given my old golfing buddy endorses it. :)	[reply] [d/l]
Re^4: Yet another config file editing programme : Tell me how to make it better ! by dazz (Beadle) on Sep 04, 2021 at 04:12 UTC
Hi I am going to use Path::Tiny. Dazz	[reply]