NULL 97 include/sys/param.h #define NULL ((void *)0) NULL 99 include/sys/param.h #define NULL 0 NULL 56 usr/include/dirent.h #define NULL 0 NULL 47 usr/include/stddef.h #define NULL ((void *)0) NULL 49 usr/include/stddef.h #define NULL 0 NULL 50 usr/include/stdio.h #define NULL ((void *)0) NULL 52 usr/include/stdio.h #define NULL 0 NULL 56 usr/include/stdlib.h #define NULL 0 NULL 41 usr/include/string.h #define NULL 0 NULL 43 usr/include/time.h #define NULL 0 NULL 43 usr/include/unistd.h #define NULL 0 /* null pointer constant */