strsplit
if ((s = strsplit(name, ' ')) != NULL) {
extern char *strsplit(char *, char);
extern char **strsplit(char *string, const char *seperators);
args = strsplit(&buf[1], "\t\n ");
if ((av = strsplit(line, " \t\n")) != NULL)
users = strsplit(optarg, ", \n");
users = strsplit(pw->pw_name, "");
list = strsplit(tmp, ",");
value = (void *)strsplit(string, ",");