make getservby*_r return error code rather than -1 (and using errno)
[musl] / src / conf /
drwxr-xr-x   ..
-rw-r--r-- 444 confstr.c
-rw-r--r-- 888 fpathconf.c
-rw-r--r-- 96 pathconf.c
-rw-r--r-- 6859 sysconf.c