file/filetype.c

#include "apue.h"intmain(int argc, char *argv[]){	int			i;	struct stat	buf;	char		*ptr;	for (i = 1; i < argc; i++) {		printf("%s: ", argv[i]);		if (lstat(argv[i], &buf) < 0) {			err_ret("lstat error");			continue;		}		if (S_ISREG(buf.st_mode))			ptr = "regular";		else if (S_ISDIR(buf.st_mode))			ptr = "directory";		else if (S_ISCHR(buf.st_mode))			ptr = "character special";		else if (S_ISBLK(buf.st_mode))			ptr = "block special";		else if (S_ISFIFO(buf.st_mode))			ptr = "fifo";		else if (S_ISLNK(buf.st_mode))			ptr = "symbolic link";		else if (S_ISSOCK(buf.st_mode))			ptr = "socket";		else			ptr = "** unknown mode **";		printf("%s\n", ptr);	}	exit(0);}