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line.c revision 1.2 
      1  1.2  perry /*	$NetBSD: line.c,v 1.2 1998/01/09 08:05:00 perry Exp $	*/
      2  1.2  perry 
      3  1.1    mrg /*	@(#)line.c	1.1	*/
      4  1.1    mrg /*
      5  1.1    mrg 	This program reads a single line from the standard input
      6  1.1    mrg 	and writes it on the standard output. It is probably most useful
      7  1.1    mrg 	in conjunction with the Bourne shell.
      8  1.1    mrg */
      9  1.1    mrg #define LSIZE 512
     10  1.1    mrg int EOF;
     11  1.1    mrg char nl = '\n';
     12  1.1    mrg main()
     13  1.1    mrg {
     14  1.1    mrg 	register char c;
     15  1.1    mrg 	char line[LSIZE];
     16  1.1    mrg 	register char *linep, *linend;
     17  1.1    mrg 
     18  1.1    mrg EOF = 0;
     19  1.1    mrg linep = line;
     20  1.1    mrg linend = line + LSIZE;
     21  1.1    mrg 
     22  1.1    mrg while ((c = readc()) != nl)
     23  1.1    mrg 	{
     24  1.1    mrg 	if (linep == linend)
     25  1.1    mrg 		{
     26  1.1    mrg 		write (1, line, LSIZE);
     27  1.1    mrg 		linep = line;
     28  1.1    mrg 		}
     29  1.1    mrg 	*linep++ = c;
     30  1.1    mrg 	}
     31  1.1    mrg write (1, line, linep-line);
     32  1.1    mrg write(1,&nl,1);
     33  1.1    mrg if (EOF == 1) exit(1);
     34  1.1    mrg exit (0);
     35  1.1    mrg }
     36  1.1    mrg readc()
     37  1.1    mrg {
     38  1.1    mrg 	char c;
     39  1.1    mrg if (read (0, &c, 1) != 1) {
     40  1.1    mrg 	EOF = 1;
     41  1.1    mrg 	return(nl);
     42  1.1    mrg 	}
     43  1.1    mrg else
     44  1.1    mrg 	return (c);
     45  1.1    mrg }
     46