scc

 1#include <stdio.h>
 2
 3#undef gets
 4
 5char *
 6gets(char *s)
 7{
 8	int ch;
 9	char *t = s;
10
11	while ((ch = getc(stdin)) != EOF && ch != '\n')
12		*t++ = ch;
13	if (ch == EOF && s == t)
14		return NULL;
15	*t = '\0';
16
17	return s;
18}