UNIX 7th Ed. - /usr/src/libc/stdio/gets.c

   1: #include    <stdio.h>
   2: 
   3: char *
   4: gets(s)
   5: char *s;
   6: {
   7:     register c;
   8:     register char *cs;
   9: 
  10:     cs = s;
  11:     while ((c = getchar()) != '\n' && c >= 0)
  12:         *cs++ = c;
  13:     if (c<0 && cs==s)
  14:         return(NULL);
  15:     *cs++ = '\0';
  16:     return(s);
  17: }

Defined functions