getconf: Report invalid variables as errors

Printing `undefined` to stdout means that the variable is valid but not
set. Instead, report an error in this case.

linux 4.13 appends the result of `getconf LFS_CFLAGS` to HOSTCFLAGS,
even if it prints `undefined`. This is arguably a bug in the Makefile,
but even so, getconf shouldn't report that unsupported variables are
valid.
master
Michael Forney 5 years ago
parent ed78aef5b1
commit c225d88d49

@ -32,7 +32,7 @@ and limits.h (Minimum and Maximum).
.sp
If
.Ar var
is not defined or has not been found,
is not defined,
.Nm
writes "undefined" to stdout.
.Sh OPTIONS
@ -48,7 +48,7 @@ was matched and its value written successfully.
.It 1
An error occured or
.Ar var
was neither defined nor found.
was invalid.
.El
.Sh STANDARDS
The

@ -102,7 +102,5 @@ main(int argc, char *argv[])
usage();
}
puts("undefined");
return 1;
eprintf("invalid variable: %s\n", argv[0]);
}

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