feat: add fail soft option to store valid temperature

[narugit]

About

• Add fail soft option (-f) to store valid temperature
• This option would be helpful with M2 Mac whose sensor is not stable (See also CPU Temp Shows 0.0 | 2023 14", M2 Max (12 Core), Sonoma 14.5 #32)

[narugit]

Hi @kyleyannelli
I've added fail soft option which I've described in #34 (comment)
Could you try this branch on your PC?

[kyleyannelli]

╭─kyannelli::mbp @ ~/smctemp/narugit
╰─ » ./smctemp -c -n1000 -f                                                                                                                                                                    1 ↵
35.4
Time: 0h:00m:04s

╭─kyannelli::mbp @ ~/smctemp/narugit
╰─ » cat /tmp/smctemp/cpu_temperature.txt
35.3717

LGTM

[narugit]

@kyleyannelli
Thank you for quick check!
But sorry, I've updated the code, so could you kindly test again?

[narugit]

@kyleyannelli
Is smctemp work when you could not get valid temperature value?

$ smctemp -c -n1000 -f

↓This would read last valid temperature from /tmp/ because it would fail to get valid temperature
$ smctemp -c -n1 -f 

[kyleyannelli]

@narugit Yes, it works. Thanks!