#include	<stdio.h>

#define	MAXLINE		1024

main()
{
	int	n;
	char	line[MAXLINE], command[MAXLINE + 10];
	FILE	*fp;

	/*
	 * Read the filename from standard input.
	 */

	if (fgets(line, MAXLINE, stdin) == NULL)
		err_sys("filename read error");

	/*
	 * Use popen to create a pipe and execute the command.
	 */

	sprintf(command, "cat %s", line);
	if ( (fp = popen(command, "r")) == NULL)
		err_sys("popen error");

	/*
	 * Read the data from the FILE pointer and write
	 * to standard output.
	 */

	while ((fgets(line, MAXLINE, fp)) != NULL) {
		n = strlen(line);
		if (write(1, line, n) != n)
			err_sys("data write error");
	}

	if (ferror(fp))
		err_sys("fgets error");

	pclose(fp);
	exit(0);
}