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

char *FollowPath(char *path, char *output);
int main(int argc, char *argv[])
{
    char buf[4096];
    if(argc > 1)
    {
        for(int i=1;i<argc;i++)
        {
            FollowPath(argv[i], buf);
            printf("%s%s\n", argv[i], buf);
        }
        return 0;
    }

    char *line = NULL;
    size_t size = 0;
    size_t bytes = 0;
    while(bytes = getline(&line, &size, stdin) != -1) {
        line[strlen(line)-1] = '\0';
        FollowPath(line, buf);
        printf("%s%s\n", line, buf);
        buf[0] = '\0';
    }
    free(line);
}

char *FollowPath(char *path, char *output)
{
    char buf[1024];
    ssize_t len;

    if ((len = readlink(path, buf, sizeof(buf)-1)) != -1)
    {
        buf[len] = '\0';
        sprintf(output, "%s -> %s", output, buf);
        return FollowPath(buf, output);
    }

    return output;
}