//fifocliserv/mainclient.c
#include	"fifo.h"

int
main(int argc, char **argv)
{
	int		readfifo, writefifo;
	size_t	len;
	ssize_t	n;
	char	*ptr, fifoname[MAXLINE], buff[MAXLINE];
	pid_t	pid;

		/*  FIFO      PID */
	pid = getpid();
	snprintf(fifoname, sizeof(fifoname), "/tmp/fifo.%ld", (long) pid);
	if ((mkfifo(fifoname, FILE_MODE) < 0) && (errno != EEXIST))
		err_sys("can't create %s", fifoname);

		/*   PID   */
	snprintf(buff, sizeof(buff), "%ld ", (long) pid);
	len = strlen(buff);
	ptr = buff + len;

		/*    */
	Fgets(ptr, MAXLINE - len, stdin);
	len = strlen(buff);		/* fgets()   0 */

		/*  FIFO         PID */
	writefifo = Open(SERV_FIFO, O_WRONLY, 0);
	Write(writefifo, buff, len);

		/*   FIFO;      */
	readfifo = Open(fifoname, O_RDONLY, 0);

		/*    IPC,   stdout */
	while ( (n = Read(readfifo, buff, MAXLINE)) > 0)
		Write(STDOUT_FILENO, buff, n);

	Close(readfifo);
	Unlink(fifoname);
	exit(0);
}
