#include <stdio.h>
#include <stdlib.h>
#include <sys/xattr.h>
#include <string.h>

void print_hex(const char *data, ssize_t len) {
    for (ssize_t i = 0; i < len; i++) {
        printf("%02X ", (unsigned char)data[i]);
    }
    printf("\n");
}

int main(int argc, char *argv[]) {
    if (argc != 2) {
        fprintf(stderr, "Usage: %s <filename>\n", argv[0]);
        return 1;
    }

    const char *filename = argv[1];
    ssize_t buffer_size = listxattr(filename, NULL, 0, XATTR_SHOWCOMPRESSION);

    if (buffer_size < 0) {
        perror("Failed to get size of xattr");
        return 2;
    }

    if (buffer_size == 0) {
        printf("No extended attributes found.\n");
        return 0;
    }

    char *buffer = malloc(buffer_size);
    if (buffer == NULL) {
        perror("Failed to allocate memory for xattr names");
        return 3;
    }

    ssize_t ret = listxattr(filename, buffer, buffer_size, XATTR_SHOWCOMPRESSION);
    if (ret < 0) {
        perror("Failed to list xattrs");
        free(buffer);
        return 4;
    }

    char *name = buffer;
    while (name < buffer + buffer_size) {
        ssize_t size = getxattr(filename, name, NULL, 0, 0, XATTR_SHOWCOMPRESSION);
        char *value = malloc(size + 1);
        if (value == NULL) {
            perror("Failed to allocate memory for xattr value");
            continue; // Skip this attribute if allocation fails
        }

        if (getxattr(filename, name, value, size, 0, XATTR_SHOWCOMPRESSION) < 0) {
            perror("Failed to get xattr value");
        } else {
            printf("Attribute: %s, Hex Value: ", name);
            print_hex(value, size);
        }
        free(value);
        name += strlen(name) + 1;
    }

    free(buffer);
    return 0;
}