/*
?*?Copyright?（c）?1987?Regents?of?the?University?of?California.
?*?All?rights?reserved.
?*
?*?Redistribution?and?use?in?source?and?binary?forms?are?permitted
?*?provided?that?the?above?copyright?notice?and?this?paragraph?are
?*?duplicated?in?all?such?forms?and?that?any?documentation
?*?advertising?materials?and?other?materials?related?to?such
?*?distribution?and?use?acknowledge?that?the?software?was?developed
?*?by?the?University?of?California?Berkeley.??The?name?of?the
?*?University?may?not?be?used?to?endorse?or?promote?products?derived
?*?from?this?software?without?specific?prior?written?permission.
?*?THIS?SOFTWARE?IS?PROVIDED?‘‘AS?IS‘‘?AND?WITHOUT?ANY?EXPRESS?OR
?*?IMPLIED?WARRANTIES?INCLUDING?WITHOUT?LIMITATION?THE?IMPLIED
?*?WARRANTIES?OF?MERCHANTIBILITY?AND?FITNESS?FOR?A?PARTICULAR?PURPOSE.
?*/

#if?defined（LIBC_SCCS）?&&?!defined（lint）
static?char?sccsid[]?=?“@（#）getenv.c	5.5?（Berkeley）?6/27/88“;
#endif?/*?LIBC_SCCS?and?not?lint?*/

#include?

/*
?*?getenv?--
?*	Returns?ptr?to?value?associated?with?name?if?any?else?NULL.
?*/
char?*
getenv（name）
	char?*name;
{
	int?offset;
	char?*_findenv（）;

	return（_findenv（name?&offset））;
}

/*
?*?_findenv?--
?*	Returns?pointer?to?value?associated?with?name?if?any?else?NULL.
?*	Sets?offset?to?be?the?offset?of?the?name/value?combination?in?the
?*	environmental?array?for?use?by?setenv（3）?and?unsetenv（3）.
?*	Explicitly?removes?‘=‘?in?argument?name.
?*
?*	This?routine?*should*?be?a?static;?don‘t?use?it.
?*/
char?*
_findenv（name?offset）
	register?char?*name;
	int?*offset;
{
	extern?char?**environ;
	register?int?len;
	register?char?**P?*C;

	for?（C?=?name?len?=?0;?*C?&&?*C?!=?‘=‘;?++C?++len）;
	for?（P?=?environ;?*P;?++P）
		if?（!strncmp（*P?name?len））
			if?（*（C?=?*P?+?len）?==?‘=‘）?{
				*offset?=?P?-?environ;
				return（++C）;
			}
	return（NULL）;
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件???????40960??2000-09-29?23:13??ab.out
?????文件????????1842??2000-09-29?23:13??getenv.c
?????文件????????1173??2000-09-29?23:13??getskeyprompt.c
?????文件?????????968??2000-09-29?23:13??hashes.asc
?????文件?????????160??2000-09-29?23:13??junk
?????文件??????131072??2000-09-29?23:13??key
?????文件????????1699??2000-09-29?23:13??keyaudit.sh
?????文件?????????455??2000-09-29?23:13??keyinfo
?????文件?????????149??2000-09-29?23:13??keyinit
?????文件??????237568??2000-09-29?23:13??keylogin
?????文件??????212992??2000-09-29?23:14??keysu
?????文件???????38558??2000-09-29?23:26??libskey.a
?????文件???????17986??2000-09-29?23:23??login.c
?????文件????????1865??2000-09-29?23:24??Makefile
?????文件????????9652??2000-09-29?23:24??md4.c
?????文件????????2722??2000-09-29?23:24??md4.h
?????文件????????1084??2000-09-29?23:27??My-Public-Key
?????文件???????20534??2000-09-29?23:24??put.c
?????文件?????????370??2000-09-29?23:28??README
?????文件????????2838??2000-09-29?23:24??setenv.c
?????文件????????2542??2000-09-29?23:22??skey.c
?????文件?????????946??2000-09-29?23:24??skey.h
?????文件??????188416??2000-09-29?23:30??skey.init
?????文件????????4436??2000-09-29?23:21??skeyinit.c
?????文件????????6937??2000-09-29?23:23??skeylogin.c
?????文件????????4432??2000-09-29?23:23??skeysubr.c
?????文件????????5765??2000-09-29?23:23??su.c