On Fri, 27 Jan 2023 21:35:11 -0800 (PST), Grant Edwards wrote:
> In Unix shells, a return code of 0 is true and non-0 is false.
That carries over to some C functions like strcmp() although it's more
complex. strcmp() returns the value of subtracting the nth character of
string b from string a if the value is not 0. For matching strings, the
result is 0 for all character positions.
This plays nicely with sorting functions but naive programmers assume it's
a boolean and strcmp("foo", "foo") should return 1 or true when the
strings match.
Returning 0 for success gives you much more latitude in return values.
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