share/man/tools/line.c

   1 /*      $NetBSD$        */
   2
   3 /*      @(#)line.c      1.1     */
   4 /*
   5         This program reads a single line from the standard input
   6         and writes it on the standard output. It is probably most useful
   7         in conjunction with the Bourne shell.
   8 */
   9 #define LSIZE 512
  10 int EOF;
  11 char nl = '\n';
  12 main()
  13 {
  14         register char c;
  15         char line[LSIZE];
  16         register char *linep, *linend;
  17
  18 EOF = 0;
  19 linep = line;
  20 linend = line + LSIZE;
  21
  22 while ((c = readc()) != nl)
  23         {
  24         if (linep == linend)
  25                 {
  26                 write (1, line, LSIZE);
  27                 linep = line;
  28                 }
  29         *linep++ = c;
  30         }
  31 write (1, line, linep-line);
  32 write(1,&nl,1);
  33 if (EOF == 1) exit(1);
  34 exit (0);
  35 }
  36 readc()
  37 {
  38         char c;
  39 if (read (0, &c, 1) != 1) {
  40         EOF = 1;
  41         return(nl);
  42         }
  43 else
  44         return (c);
  45 }