tolower           163 kern/tty.c     #define	tolower(c)	((c) - 'A' + 'a')
tolower           120 lib/libsa/stand.h #define tolower(c)	(isupper(c)?((c) - 'A' + 'a'):(c))
tolower          1473 netinet6/icmp6.c #define tolower(x) (isupper(x) ? (x) + 'a' - 'A' : (x))