filetype.c

#include<stdio.h>
#include<stdlib.h>

#include<unistd.h>
#include<sys/stat.h>

int main(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)
         {
            return -1;  
            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);
}