2.9BSD - /usr/src/ucb/double.c

   1: /* Copyright (c) 1979 Regents of the University of California */
   2: #include <stdio.h>
   3: char    ibuf[BUFSIZ];
   4: 
   5: main(argc, argv)
   6:     int argc;
   7:     char *argv[];
   8: {
   9:     register char *linp;
  10:     FILE *f;
  11:     register int c;
  12:     char line[1000];
  13: 
  14:     setbuf(stdout, ibuf);
  15:     argc--;
  16:     argv++;
  17:     f = stdin;
  18:     do {
  19:         if (argc > 0) {
  20:             close(0);
  21:             if ((f=fopen(argv[0], "r")) < 0) {
  22:                 perror(argv[0]);
  23:                 exit(1);
  24:             }
  25:             argc--, argv++;
  26:         }
  27:         for (;;) {
  28:             linp = line;
  29:             for (;;) {
  30:                 c = getc(f);
  31:                 if (c == '\n' || c == -1)
  32:                     break;
  33:                 *linp++ = c;
  34:             }
  35:             if (linp == line) {
  36:                 if (c == '\n')
  37:                     printf("\n");
  38:             } else {
  39:                 *linp = 0;
  40:                 printf("%s\r%s\n", line, line);
  41:             }
  42:             if (c == -1)
  43:                 break;
  44:         }
  45:     } while (argc > 0);
  46:     fflush(stdout);
  47:     exit(0);
  48: }

Defined functions

Defined variables