make more descriptors that we open as close-on-exec

Convert to use C89 prototypes.
Remove use of __P

PR/46111: Wolfgang Stukenbrock: Add yp_setbindtries(3) so that yp operations
don't hang forever if requested.

use FD_CLOEXEC instead of 1.

#include "reentrant.h" instead of <threadlib.h>

add a simple lock in _yp_check(), to make it re-entrant.

Modify the licences of code written by Theo De Raadt from a 4-clause
to a 2-clause licence (retaining UCB clauses (1) and (2)), per PR
22409 from Joel Baker, approved by Theo de Raadt, and ratified b

Modify the licences of code written by Theo De Raadt from a 4-clause
to a 2-clause licence (retaining UCB clauses (1) and (2)), per PR
22409 from Joel Baker, approved by Theo de Raadt, and ratified by
myself - the only discrepancy being the handling of the original
clause 3 in src/usr.sbin/yppoll/yppoll.c.

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use strlcpy where it is more appropriate.

Fix signed/unsigned comparison warnings.

add explicit casts to avoid parameter conversion warnings.

Delint.
Remove trailing ; from uses of __weak_alias(). The macro inserts this if
needed.

back out the #ifdef _DIAGNOSTIC argument checks; too many people complained.
_DIAGASSERT() is still retained.

* use _DIAGASSERT() to check pointer arguments against NULL and file
descriptors against -1 (as appropriate).
* add actual checks which to detect stuff that would trigger_DIAGASSERT(),
and attemp

* use _DIAGASSERT() to check pointer arguments against NULL and file
descriptors against -1 (as appropriate).
* add actual checks which to detect stuff that would trigger_DIAGASSERT(),
and attempt to return a sane error condition.
* knf some code
* remove some `register' decls.

the first two items result in the addition of code similar to the
following in various functions:

_DIAGASSERT(path != NULL)
#ifdef _DIAGNOSTIC
if (path == NULL) {
errno = EFAULT;
return (-1);
}
#endif

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xdrproc_t casts

Remove a little lint.

Relax checks in _yp_invalid_domain(); yp domains don't have to be
RFC1035 compliant. Still ensure that the give domain isn't empty,
isn't too long, and isn't going to be a security problem.

If port provides __weak_alias(), provide an Standard C and POSIX pure
identifier namespace by renaming non standard functions and variables
such that they have a leading underscore. The library will

If port provides __weak_alias(), provide an Standard C and POSIX pure
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>.

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Fix RCSID's
printf -> warnx
Fix gcc warnings
Put locally declared functions in local.h

* implement _yp_invalid_domain, which returns non-zero if the given
domainname isn't RFC1035 compliant. Also ensure that the length <=
YPMAXDOMAIN (which is less than what RFC1035 allows).
* use

* implement _yp_invalid_domain, which returns non-zero if the given
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

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- convert unsafe strcpy(), strcat() and sprintf() to the `n' versions.
- some KNF.

Use a different timeout for the underlying RPC transmission than the
upper-level YP call. This allows the RPC code to retry the transaction,
which is helpful for busy networks.

Problem noted and su

Use a different timeout for the underlying RPC transmission than the
upper-level YP call. This allows the RPC code to retry the transaction,
which is helpful for busy networks.

Problem noted and suggested fix from Michael.Eriksson@era-t.ericsson.se,
and slightly modified by me to compute the RPC timeout one at compile-time,
rather than N times at run-time.

Fixes PR #3117.

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Report yp errors every _yplib_nerrs like the other routines.

Pull down yp/xdr fixes from release branch.

Avoid using clnt_perror() on the first rpc failure, since it is going to be
retried anyway. Only report it every _yplib_nerrs times.

Split yp_first, yp_next, yp_maplist and yperr_prot out of yplib.c.
Use a constant struct timeval for yp timeouts instead of creating
a new struct timeval in each yp function at runtime.