#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>

void
perror_and_exit (const char *msg)
{
    int err = errno;
    fflush (stdout);
    fprintf (stderr, "%s: %s\n", msg, strerror (err));
    exit (errno);
}

int
main (int argc, char **argv)
{
    struct stat buf;
    const char *ptr;
    for (int i = 1; i < argc; ++i)
        {
            printf ("%s ", argv[i]);
            if (lstat (argv[i], &buf) < 0)
                perror_and_exit ("lstat");
            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";
            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);
        }
}

$ /data/apue/build/apue /home /dev/fd/0 /
/home directory
/dev/fd/0 symbolic link
/ directory