Catch up with all the lint warnings since exit on warning was disabled.
Disable 'missing header declaration' and 'nested extern' warnings for now.

add execvpe, execlpe (reviewed by phone)

add a comment.

undo the previous; we need alloca here, otherwise the parent will leak on
vfork.

use mmap instead of malloc because we may have vforked. pointed out by yamt.

if we are using ssp, use malloc instead of alloca.

WARNS=4

appease gcc -Wuninitialized

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

PR/13242: John Heasley: ENOTDIR is not fatal

Don't acquire __environ_lock around exec*() calls; nothing requires
that these calls be thread-safe with respect to the environment, and it
causes serious problems for threaded applications which cal

Don't acquire __environ_lock around exec*() calls; nothing requires
that these calls be thread-safe with respect to the environment, and it
causes serious problems for threaded applications which call vfork() and
exec*() (including indirectly, via popen() or system()).

Acquire and release __environ_lock in the parent in popen() and system() to
play safe and provide the child with a stable environment.

__environ_lock should also have an atfork() handler; still under development.

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Merge the nathanw_sa branch.

Use memcpy instead of memmove since no overlaps here (copy from somewhere
outside of the funciton to our stack).

Cosmetic changes (including ANSI'fy).

Remove unnecessary alloca, strcpy and strlen call.

Use alloca() instead of malloc() and strdup(). Proper fix for the find
problem posted to current-users@netbsd.org. Solution suggested by a
couple of folks on that mailing list, and Art Grabowski wh

Use alloca() instead of malloc() and strdup(). Proper fix for the find
problem posted to current-users@netbsd.org. Solution suggested by a
couple of folks on that mailing list, and Art Grabowski who pointed me
at a similar change in OpenBSD.

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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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revert previous (as per klaus). will diagassert() name == NULL check instead...

check name != NULL before checking name[0] != '\0'

Make argv construction code reentrant.

fix lint const lossage.

Add a multiple-reader/single-writer lock to protect environ.

fix bcopy->memcpy with memcpy->memmove -- not strictly needed, but...