main.c

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#define __STDC_WANT_LIB_EXT1__ 1
#include <errno.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/io.h>
 
int main(int argc, char** argv)
{
    if (argc < 2)
    {
        fprintf(stderr, "%s <path>\n", argv[0]);
        return EXIT_FAILURE;
    }
 
    char buffer[MAX_PATH];
    uint64_t len = readlink(argv[1], buffer, sizeof(buffer) - 1);
    if (len == ERR)
    {
        fprintf(stderr, "readlink: failed to readlink %s (%s)\n", argv[1], strerror(errno));
        return EXIT_FAILURE;
    }
    buffer[len] = '\0';
    printf("%s\n", buffer);
 
    return EXIT_SUCCESS;
}