thread safe function

Table 6-1 Reentrant Functions

alphabetical order	gethostbyaddr_r(3n)	getrpcent_r(3n)
asctime_r(3c)	gethostbyname_r(3n)	getservbyname_r(3n)
ctermid_r(3s)	gethostent_r(3n)	getservbyport_r(3n)
ctime_r(3c)	getlogin_r(3c)	getservent_r(3n)
fgetgrent_r(3c)	getnetbyaddr_r(3n)	getspent_r(3c)
fgetpwent_r(3c)	getnetbyname_r(3n)	getspnam_r(3c)
fgetspent_r(3c)	getnetent_r(3n)	gmtime_r(3c)
gamma_r(3m)	getnetgrent_r(3n)	lgamma_r(3m)
getauclassent_r(3)	getprotobyname_r(3n)	localtime_r(3c)
getauclassnam_r(3)	getprotobynumber_r(3n)	nis_sperror_r(3n)
getauevent_r(3)	getprotoent_r(3n)	rand_r(3c)
getauevnam_r(3)	getpwent_r(3c)	readdir_r(3c)
getauevnum_r(3)	getpwnam_r(3c)	strtok_r(3c)
getgrent_r(3c)	getpwuid_r(3c)	tmpnam_r(3s)
getgrgid_r(3c)	getrpcbyname_r(3n)	ttyname_r(3c)
getgrnam_r(3c)	getrpcbynumber_r(3n)	.