xar-bug.c

#include <stdio.h>
#include <archive.h>
#include <archive_entry.h>

#define LOG(...) { printf(__VA_ARGS__); puts(""); }

int main() {
    const char* file_name = "test.pkg";
    struct archive* a = archive_read_new();
    archive_read_support_filter_gzip(a);
    archive_read_support_filter_bzip2(a);
    archive_read_support_format_xar(a);

    if(ARCHIVE_OK != archive_read_open_filename(a, file_name, 10240)) {
        LOG("can't open file %s", file_name);
        return 1;
    }

    struct archive_entry* entry = NULL;
    int ret;

    for(;;) {
        ret = archive_read_next_header(a, &entry);
        if(ret == ARCHIVE_EOF) {
            LOG("encountered EOF");
            break;
        } else if(ret != ARCHIVE_OK) {
            LOG("archive_read_next_header() failed");
            return 1;
        }

        LOG("- %s", archive_entry_pathname(entry));

        la_int64_t size = archive_entry_size(entry);
        uint8_t *buff = (uint8_t*) malloc(size);

        ssize_t r = archive_read_data(a, buff, size);
        free(buff);

        if(r < 0) {
            LOG("archive_read_data() error: %d", (int) r);
            return 1;
        } else {
            LOG("read %zu bytes", r);
        }
    }

    if(ARCHIVE_OK != archive_read_close(a)) {
        LOG("error while closing archive");
        return 1;
    }

    return 0;
}