2.9BSD - /usr/src/cmd/echo.c

   1: #include <stdio.h>
   2: 
   3: main(argc, argv)
   4: int argc;
   5: char *argv[];
   6: {
   7:     register int i, nflg;
   8: 
   9:     nflg = 0;
  10:     if(argc > 1 && argv[1][0] == '-' && argv[1][1] == 'n') {
  11:         nflg++;
  12:         argc--;
  13:         argv++;
  14:     }
  15:     for(i=1; i<argc; i++) {
  16:         fputs(argv[i], stdout);
  17:         if (i < argc-1)
  18:             putchar(' ');
  19:     }
  20:     if(nflg == 0)
  21:         putchar('\n');
  22:     exit(0);
  23: }

Defined functions