Kogasa

I can sorta see that. An exit code is an exit code. But exit codes, like words, have meanings. Sometimes that meaning is a boolean value, as is the case in e.g. GNU Coreutils conditions: https://www.gnu.org/software/coreutils/manual/coreutils.html#Conditions

Yes, it is used consistently in GNU Coreutils: https://www.gnu.org/software/coreutils/manual/coreutils.html#Conditions

• false: do nothing, unsuccessfully (returns 1)

• true: do nothing, successfully (returns 0)

• test: check file types and compare values is documented as “returns a status of 0 (true) or 1 (false)”

What you’re saying is irrelevant. In the real world, when an exit code is a boolean, 0 is true.

Every time an exit code is a boolean, 0 is true. Shell scripting would be very annoying if this were inconsistent