identifier namespace by renaming non standard functions and variables
such that they have a leading underscore. The library will use those
names internally. Weak aliases are used to provide the original names
to the API.
This is only the first part of this change. It is most of the functions
which are implemented in C for all NetBSD ports. Subsequent changes are
to add the same support to the remaining C files, to assembly files, and
to the automagically generated assembly source used for system calls.
When all of the above is done, ports with weak alias support should add
a definition for __weak_alias to <sys/cdefs.h>.
domainname isn't RFC1035 compliant. Also ensure that the length <=
YPMAXDOMAIN (which is less than what RFC1035 allows).
* use _yp_invalid_domain in the public front-ends, instead of using
hand-rolled checks
* fix a typo
(set them to the null pointer instead).
Thus, code that doesn't specificallly attempt to clean up allocated
memory after an error result is returned from yp_...() won't have an
unexpected memory leak (i.e, most 3rd party code)
* Ensure that all 'char **outXXX' pointers aren't the null pointer before use.
* Set *outXXX=NULL before checking any other arguments.
* Document that *outXXX will always be NULL or a malloc(3)ed string
unless outXXX was NULL (in which case YPERR_BADARGS will be returned
and the caller shouldn't attempt to free(*outXXX) if *outXXX != NULL;
These changes should prevent most occurances of coredumps when a bad
argument was given to a yp client function and the caller attempts to
free an outvalue that isn't the null pointer. To be really safe, the
caller probably should set the *outvalue=NULL anyway (ref: PR [lib/3580])
jtc